Printing plate with communicating printing elements and method of printing with this plate

FIELD: polygraphy.

SUBSTANCE: invention can be used for making various printed products, in particular, securities paper money, bank checks, obligations, lottery tickets etc. The printing plate has a printing surface, in operation, coming in contact under pressure with taking up surface to transfer an ink layer kept in printing elements on the latter. At least, two printing elements are intercommunicated above the printing surface via an ink distribution appliance. The said appliance serves to distribute ink between the printing elements by taking up surface pressure on the printing layer when it gets deformed into the printing elements under printing pressure. The printing method consists in that the ink is redistributed between communicated printing elements after they get filled with ink in the contact between the printing plate working surface and taking up surface, the redistribution being initiated by the pressure of taking up surface onto the printing layer.

EFFECT: higher printing quality, higher protection of imprints against imitation, higher-quality color imprint.

28 cl, 12 dwg

 

The invention relates to printing processes in which the dye image is transferred by the printing form on the printing material directly or by offset forms due to mechanical pressure. The invention can be used for production of various printed products with getting the impression high quality media of various types and, in particular, for printing securities, such as banknotes, bonds, cheques, lottery tickets, etc.

In known printing processes carried out with the use of printed forms with advanced printing elements, one of the problems is that under the influence of pressure in the printing process is "dot gain" colorful image due to the ingress of excess paint from the crowded printed elements on whitespace areas of the form. Insufficient filling paint any printed elements may nephropathie the relevant sections of colorful images.

At low pressures, characteristic, for example, for screen printing using printing plates with end-to-end or in-depth printing elements, a substantial thickness of a layer of paint limits allow the characteristics of the image. To obtain a qualitative impression of the necessary special the paint and methods of fixing the image on the sheet, that significantly reduces productivity and increases costs.

Screen printing because of the specific characteristics and, in particular, because of the low pressure when printing cannot be used to obtain a seal with the characteristic features inherent in the prints obtained, for example, metallographic printing, when printing of securities.

When metallographic printing ink filled only deepening, performed on the surface of the printing plate by etching or engraving, for which after the application of ink to the printing plate, the excess is removed by means Vechernij devices - erasing roller or squeegee (EN 2249639, WM 3/14, 10.04.2005 - /1/, WO 00/20216, WM 3/00, 13.04.2000 - /2/).

In the printing process in /1/ and /2/ printed material with high pressure on the pressure cylinder with an elastic surface to printed form. With a basis of printing material, for example paper, is pressed into the filled paint deepening of the printing form.

Received the imprint consists of spaced apart printed lines or areas (dice), which, depending on the depth of the engraving of the printing form is covered with a colored layer of different thickness.

Under high pressure the printed material is additionally subjected to embossing, and the reverse side of the media bought etait relief structure. In the printing method of metallographic print-based media as a result of its stamping and transfer it paints the result is a print with a distinct touch of a relief structure.

These are the features obtained by the method of metallographic printing impressions allow us to distinguish them from the impressions obtained by other methods. However, metallographic printing as varieties of gravure printing inherent problems of "dot gain" colorful image, nephropathia and non-uniform thickness of the paint layer in areas with different optical density of the print.

To obtain relief print of an image with a sufficient thickness of the layer of paint and high-definition applied combination printing, in which a screen printing form with continuous printing elements is placed between the form of letterpress printing and the printing material (patent RU 2191700, then /3/). In the form of a high printing a layer of paint, with the transfer of ink to the printing material is carried out by pressing the Dekel printing material by a screen printing form, and the latter to the form of letterpress printing and create a tight contact between them. The resultant impression is typical for prints securities clarity, relief and structure.

A disadvantage of this known technical solved the I /3/ include low productivity and complexity of automation of the printing process for large print runs.

From the patent RU 2225291 (hereinafter - /4/) known printing form with an in-depth print raster elements formed by the intersecting grid of raster lines, which raster printing element is connected with a connecting through a gap in the raster line. To obtain a print raster elements are filled with paint, the surplus is removed by the squeegee, while the raster line are the backbone of the paper, in which the printing process is in direct contact with the raster. The presence of gaps leads to the fact that the amount of ink transferred to the printing material, increases. Sealed surfaces become more homogeneous and have no traces of raster lines.

However, the print process /4/ requires the use of special colors with certain rheological characteristics, properties which should ensure the diffusion of ink in places of contact between the raster lines and paper. The use of this printing process is also limited by the requirements of the printed materials, mainly paper, which must have the appropriate properties.

From patent document JP 2000-335124 And (hereinafter - /5/) known printing method and printing plate deep (metallographic) printing, which contains a means for regulating the level of ink in the printing element made in the form of the Porsche is avago device, which raises the ink in printing element, thereby eliminating the possibility of nephropathia. However, the printing form /5/ has a complex structure due to the presence of piston devices, each printing element.

In known printing processes the print quality is also determined by the features of the process of transfer of ink from the plate to the printing material, which determines the quality of the structures formed by splitting colors, which create the impression of uneven sealing surface of the paper.

In printed form elements based paint is not as smooth layer, and has a more or less uneven granular structure. The transfer of excessive amounts of paint leads to the formation of too rough structure on the surface of the transferred after splitting layer. In the process of separation of the paper from the form is mostly formed one big colorful cord, which in the end is broken in the middle.

A small number of colorful threads per unit area leads to the formation of a rough surface structure splitting, which on paper has the appearance of orange peel skin. Fine structure of the surface of rupture leads to greater uniformity of the imprint.

It is known that the uniformity of the imprint can be achieved with the exception of the factors complicating the case is the paint on the stage of the gap, such as high viscosity, high speed printing and low thickness of the paint layer.

However, this limits the variety of colorful and printed materials that can be used to achieve certain effects, providing a high degree of protection of the valuable document from forgery, and reduces the productivity of printing.

The basis of the invention is the creation of printing plates, ensuring the achievement of the technical result consists in increasing the print quality by reducing the likelihood of "dot gain" paint on space stations, receiving impressions with a high degree of protection against forgery, similar prints metallographic printing, and improving the quality of the impression due to the formation of fine patterns of colorful imprint.

In addition, the technical result consists in expanding the technological capabilities of the printing process by providing a supply of paint from the side of the working surface of the printing form similar to the ink in gravure printing, and on the reverse side of the working surface similarly to the ink in screen printing.

In addition, the basis of the invention was based on the goal of improving the performance of the printing process and expanding the range used is krasochnyh and printed materials.

This problem is solved by using objects presented in the independent claims. Preferred embodiments of the invention are given in the respective dependent claims.

According to the first invention of the technical result is achieved due to the fact that the printed form containing the working surface, the contact pressure in the printing process with the receptive surface for transfer to it of the paint layer, which is located in the printed elements, characterized by the fact that at least two of the printing element communicated among themselves under the work surface by means of redistribution of paint between them due to the pressure of the receptive surface on the paint layer when the deformation in the print elements under the pressure of printing.

This ensures the exclusion or reduce the likelihood of "dot gain" paint on space stations by moving excess paint from one of the printing elements by means of redistribution of paint in the other printed items. Under the receptive surface here and below, refers to any surface of the printed material with the transfer to it of the paint from the form, or offset surface, which after applying the paint, the image is transferred to sepecat the excavated material.

To improve the quality of fingerprint patterns, at least one of the communicated printing elements has a means to break the paint layer, made in the form of at least one element that separates the cavity of this printing element, at least two parts and designed to interact with the receptive surface when it is deformed under the pressure of printing.

In the deformation process of the receptive surface up to possible contact with the separating cavity element rupture of the paint layer in the printed item. Due to this, on the receiving surface after its separation remains the imprint formed in the process of transfer of ink to the large number of short fibers, which reduces the effect of "orange peel".

Means for redistribution of paint can be made in the form of at least one channel, informing the cavity of the printing elements.

To fill the print element ink printing form can have channels, lead paint from the system inking means for the redistribution of paint, which are cylindrical and/or slit-like.

Channels, lead paint, can be combined into groups by color inks supplied from the ink, in accordance with the color image.

In order to simplify the technology is the production technology of channels and elements of the gap of the printing form can contain, at least two functional layers, of which the first printed layer is performed with the working surface and through the printing elements, and a second support layer on its inner side adjacent to the first layer, is exposed through the printing elements of the bottom areas of the printing elements.

The first and second functional layers can be performed respectively in the form of printed and supporting plates of metal.

As one of the variants of the structural design tool for the redistribution of paint can be made in the form of a guaranteed backlash between the first and second layers.

Channels, lead paint, and means for redistribution of paint should be designed to ensure that the outlet pressure of the supply canals paint in the deformation process of the receptive surface is greater than the pressure at the entrance of this channel.

This ensures the redistribution of paint between the printing elements and prevents reverse movement of the ink supply channels in the deformation process of receptor surface.

As one of the variants of the structural design tool for the redistribution of paint can be made in the form of forming the channel grooves on one or both adjacent or located with a gap to each other is of nutrena sides of the functional layers.

Most preferably, the execution means to redistribute the ink channels are formed by grooves on the inner side of the second functional layer.

To ensure redistribution of paint between the printing elements and the exclusion of its reverse movement in the inlet channels when the total hydraulic redistribution (hydrodynamic) resistance channels, lead paint, must exceed the total hydraulic resistance of the channel means.

Tool to break the paint layer and a tool for the redistribution of ink in the printed items can be made in the form of a grid, placed between the first and second layers.

In this case, the spaces between the weaves threads of the grid and the adjacent surfaces of the functional layers play the role of channels for redistribution paint between the printing elements and located in the region of the printing elements are lots of threads are elements to break the paint layer in the cavities of the printing elements during deformation perceiving the paint surface.

To exclude the migration of the ink in the channels, lead paint, these channels and the grid should have geometrical parameters, in which the output pressure of the supply canals paint in the deformation process of receptor surface before Iset pressure at the entrance of this channel.

To increase the run length of the printing form channels, lead paint, and mesh are geometrical parameters, in which the deformation process of receptor surface the difference between the pressure unit and the output pressure of the supply canals paint, provides pressure in the contact area of the grid with the layers not exceeding the yield strength of the material of the grid and layers.

The mesh may be made of metal or polymer, the thickness of the grid defined twice the diameter of the threads of the weave, shall be not less than 0.08 mm, which, considering the rheological properties of paints is the minimum value to ensure redistribution of paint in between the weave of the mesh.

Tool to break the paint layer and a tool for the redistribution of ink in the printed items can be made in the form of ribbed patterns on one or both adjacent to each side of the functional layer.

In this case, the intervals between the projections and the adjacent surfaces of the layers function as channels for the redistribution of paint between the printing elements and located in the region of the printing elements of the crests of the projections are elements to break the paint layer in the cavities of the printing elements during deformation perceiving the paint surface is.

Channels, lead paint, and geometric parameters of the ribbed structure must be designed to ensure that the outlet pressure of the supply canals paint in the deformation process of printing material exceeds the inlet pressure of these channels to avoid moving the ink in the supply canals paint.

For this geometric parameters of the channels, lead paint, and ribbed patterns are selected from the conditions under which the total hydraulic resistance of the channel, lead paint, exceeds the total hydraulic resistance of the channels formed ribbed structure.

The technical result is also achieved by a method of printing in which the working surface of the printing form under pressure in the printing process in contact with the receptive surface of the transfer to it of the paint layer, which is located in the printed items, including the completion of the printed elements paint, characterized in that the printing is carried out in block form, of which at least two printing element communicated among themselves under the work surface, after filling of the printing elements of the paint in the process of contact of the working surface of the printing form with the receptive surface redistribute paint communicated between the printed ale is nami due to the pressure of the receptive surface on the paint layer during its deformation printed items under the pressure of printing.

This ensures the exclusion or reduce the likelihood of "dot gain" paint on space stations by moving excess paint in some printed items by means of redistribution of paint in the other print elements.

The printing method is characterized by the fact that at least one of the communicated printed elements break the paint layer due to the interaction of receptor surface at its deformation with at least one element dividing the cavity and, accordingly, the paint layer of the printing element on the at least two parts.

This ensures that the imprint on the receiving surface formed in the process of transfer of ink to the large number of short fibers that eliminate the visual effect of "orange peel".

The method is characterized also by the fact that pressure when printing provides elastic and/or plastic deformation of the receptive surface, necessary for the redistribution of paint and tear of the paint layer.

As a receptive surface can be a surface of printing material, which is deformed elastically and/or plastically than provide typical metallographic printing impression and processing the printing material.

This is pic is b print direct transfer colorful image from the plate to the printing material.

In addition, as a receptive surface can be selected offset surface from which the paint layer is transferred onto the surface of printing material. Offset surface is deformed only elastically to ensure that it is reusable.

The completion of the printed elements of the paint carried out by the working surface of the mold or from the side, the back side of the working surface of the mold. In the first case, the filling of the printing elements of the paint by using means and methods that are used to do this in a deep and, in particular, metallographic printing, and the second screen printing.

Described printing method can be used to print a variety of printed products and, in particular, for printing securities, and documents.

Figure 1 schematically shows a printing form to the printing elements, a transverse incision;

figure 2 - the printed form of the two functional layers indicated by the printing elements, and means for breaking the paint layer in the cavity of the printing element;

figure 3 - printed form of two layers with channels for feeding ink to the printing elements, and means for breaking the paint layer in the cavity of the printing element in cooperation with the printing material in the printing process;

figure 4 - view And on Fig;

figure 5 - section b-B in figure 4;

figure 6 - shows the printed form of two layers with channels for feeding ink to the printing elements, and means for breaking the paint layer and the redistribution of paint in the form of a ribbed structure in the printing process in cooperation with the printing material;

7 - multilayer printed form with galvanic grid and the grid formed by the weave, as a means to break the paint layer and the redistribution of ink in the printed items;

on Fig - printed form, in which the means for breaking the paint layer and the redistribution of ink in the printed elements are in the form of a mesh weave between layers with slit-like channels for supplying ink to the printing elements, type in the plan;

figure 9 is presented to the printing form, in which the means for remapping colors in the printed elements are in the form of channels between the layers with cylindrical channels for supplying ink to the printing elements, type in the plan;

figure 10 is a printed form with mesh weave, located between layers, the first layer is a sublayer;

on 11, 12 shows diagrams illustrating possible embodiments of a rotary printing with ink from the working surface of the form.

Printing form 1, presented in figure 1 is made solid and contains a working surface, contacting under pressure in the printing process with the receptive surface for transfer to it of the paint layer.

The receptive surface may be the surface of printing material, in particular paper, and offset surface from which the dye image is transferred to the printing material.

Form 1 has a printed items 2, of which at least two reported among themselves under the working surface with at least one channel 3. Channel 3 is one of the easiest design tools for redistribution paint communicated between the print elements 2 through the pressure receptive surface for the paint layer when the deformation in the print elements under the pressure of printing.

Print elements 2 can be performed bitmap, dashed, dotted with a minimum size of "a" in the plan or a spot with a big "b" of the cavity.

The dimensions and configuration of the printing elements may be different depending on the nature, purpose and process of the portable colorful image.

At least one of the indicated print elements 2 has a means to break the paint layer, made in the form of at least one element 4, which separates the cavity of this print element 2, at least two hours the STI (Figure 2).

Printed form for ease of manufacture can be carried out at least two functional layers - printed 5 and the base 6 from which the first printed layer 5 is made with the working surface and through the print elements 2, in the cavity formed by 4 elements.

Support layer 6 adjacent to the layer 5, with the open end-to-end print elements 2 in the layer 5, the portions of the inner side layer 6 is formed by bottom areas of the printing elements 2.

Direct transfer color images, in which the receptive surface is the surface of printing material, in particular paper 7 is carried out due to pressure on the paper in the print area, for example, by means of a clamping plate 8 (figure 3).

To obtain the effect printing, typical metallographic printing important documents (embossed structure of the paper, the print with discernible to the touch relief structure, sealing and smoothing the surface of the valuable document), the pressure is selected in the range of 3-8 kg/mm

Element 4 to break the paint layer may be in the form of baffles or dams separating the cavity of the printing element.

Such partition or jumper has a working surface 9 to communicate with the colored layer and the receptive surface when the Def is rmacie under pressure printing in the print element (4, 5).

The working surface 9 facing the receptive surface. In cross section it may have a rounded shape. The working surface 9 performs the function of the blade when the separation of the paint layer in the deformation process of receptor surface.

Wall or lintel can be, for example, the areas of the projections of a ridge structure 10 on the inner side of the layer 6, in which the intervals between the projections can serve as channels 11 for the redistribution of paint between the printing elements (6).

Filling paint printed elements 2 can be carried out by the working surface "C" shape, and on the opposite side of the channels 12, lead paint from the system inking means for the redistribution of paint.

The channels 12 may be made cylindrical and/or slit-like and grouped by color inks supplied from the ink, in accordance with the color image (figure 3, 6-10).

The most preferred possibilities of color are cylindrical channels 12 (Fig.9), but these channels are more difficult to perform technically. More simple to manufacture slit-like channels (Fig).

Element 4 can also be a lots of threads weave mesh 13 located in the region of the printing element between the layers (7, 8, 10).

unctionally layers 5 and 6 can be performed respectively in the form of printed and base plate made of metal, the tool for the redistribution of paint can be made in the form of a guaranteed gap between the plates. Such a gap can be provided, for example, strips of the desired thickness between the layers along the perimeter of the plates and/or free from printing elements zones.

The channels 12, lead paint, and means for redistribution of paint should be designed to ensure that the outlet pressure of the supply canals paint in the deformation process of the receptive surface is greater than the pressure at the inlet of these channels. This condition is necessary to first of all carried out a redistribution of paint between the printing elements and the paint was not moved in the inlet channels

Means for redistribution of paint can be made in the form of forming the channels 11 of the grooves on one or both adjacent or located with a gap to each other, the inner sides of the functional layers 5 and 6 or in the form of channels formed by grooves on the inner side of the second functional layer 6 (6). Such grooves can be formed, for example, the ribbed structure 10.

In order to secure the movement of the ink channels means redistribution of the total hydraulic resistance of the channel 12, lead paint should be more than su the total hydraulic resistance of the channels 11 or 3 tools for redistribution paint.

In case of implementation tools to break the paint layer and means for redistribution of paint in the form of a grid 13 (7, 10) channels 12, lead paint, and the grid 13 in order to secure the movement of the ink channels funds reallocation must have geometrical parameters, in which the output pressure of the supply canals paint in the deformation process of the receptive surface is greater than the pressure at the entrance of this channel.

Step weave 14 mesh 13 largest is selected smaller than the minimum size, "and" print element 2, to ensure that in the process of printing a guaranteed gap layer of paint in any printed item.

When using the grid as a means to break the paint layer and the redistribution of paint should also take into account the following circumstances.

In the printing process under the pressure of printing on a printing plate, a grid and the base plate are a variety of loads that cause different types of stress on different areas depending on many factors.

The nature of the interaction of system elements "of the printing plate - grid - support plate define the circuit loading, the pressure seal, the geometry of the printing plates, grids, form channels and print elements, and so forth

Due to the fact that p is acesse printing mesh between the printing plates is under relatively high pressure, applied in the "point" of the contact areas of the grid plates, the stress state in these zones is characterized by a rather large quantities.

With regard to the scheme of loading the printing plate when the printing process can be considered that the main type of deformation, which can lead to loss of operational qualities of the printing plate is plastic deformation in these "spot" zones of contact.

Therefore, the pressure in the contact area of the grid 13 and the plates 5 and 6 should not exceed the yield strength of the material of the grid and plate.

"Weak point" in the system "printed plate - grid - support plate are also regional sites through the printing elements in the plate 5 and the peripheries of the outlet openings of the inlet the ink channels in the base plate 6, which can contact the threads of the mesh 13.

In experimental printed forms used metal printing plates of different material (steel, copper, brass) with a thickness d of 0.5-1.5 mm (tested minimum thickness of 0.1 mm), metal or polymeric grid formed by the weave, with a height (thickness)equal to twice the value of the thread diameter of 0.1 - 0.8 mm (tested minimum thickness of 0.08 mm).

Used metal base plate made of brass or steel with a thickness of 1-5 mm are arranged in parallel SEL the new channels, applying paint with a width of a gap (the minimum distance between the parallel facing to each other of the inner walls) from 0.5 mm to 3 mm and wall thickness between channels 1-3 mm

In experiments it was observed precipitate the polymer network, the thickness (height) which was decreased to about half its original thickness.

In the case of selecting the grid 13 with a minimum thickness (the minimum diameter of the threads) on the grid and on the inner surfaces of the reference and printing plates were cold working, which led to a partial rolling of the channels, making the paint system paint flow, and change the configuration of the edges of the holes of the printed elements on the inner side of the printing plate.

With a significant increase in the thickness of the grid (over 0.2 mm) hardening disappeared, but there was a slight deterioration in the quality of the imprint associated with negative migration paint with increasing gaps between the plates and weaves threads of the mesh, the diameter of which was, accordingly, large.

For optimum operation of the printing form, the grid 13 and the channels 12 should have such geometrical parameters, in which the deformation process of receptor surface pressure printing counteracts the pressure of the paint in between the strands of the mesh and plates 5 and 6.

This condition is ensured by the choice of the m certain hydraulic (hydrodynamic) resistance lead paint channels and channels, formed between the threads of the mesh and plates.

Hydraulic resistance, as is known, depends on the geometrical parameters that can be selected empirically or calculated by known methods.

Compliance with this condition in the first place, provides guaranteed redistribution of paint between the printing elements in the presence of lead paint channels, because it removes the possibility of moving the ink supply channels instead of redistribution.

Secondly, under this condition the stress state in the contact area with grid plates will be determined not fully applied pressure seal, and the difference between applied pressure and printing pressure at the outlet channels, the inlet of the paint, i.e. the pressure between the threads of the mesh and plates.

The pressure difference must be such as to provide for the expense of such back pressure (overpressure) pressure printing reducing stress in the contact area of the grid plates and the edges of the holes to the value not exceeding the yield strength of the material of the grid 13 and the layers 5 and 6.

The above analysis of loading in contact during the printing process of the form elements can be attributed to printed forms with ribbed structure.

However, the area of a "line" of contact vertices of ribbed protrusions with the touch with the inner side of the plate has a relatively large area, what "point" area, and therefore the problem of preserving the printed form with ribbed structure is not so relevant as to form meshes.

Figure 6 presents the printed form, which means to break the paint layer and a tool for the redistribution of paint made in the form of a ridge structure 10 on the inner surface of the second functional layer 6. Rib structure has a constant t1and/or variable pitch of the projections, the spaces between which are formed in the layer 6 channels 11.

Rib structure or parts of such structures can be performed on the inner sides of both layers in different directions, which provides a better redistribution of paint, as the paint can be distributed in two different directions at intervals between the projections ribbed patterns of the first and second layers 5 and 6.

In order to secure the redistribution of paint between the printing elements of the channels 12, lead paint, and geometrical parameters of a ridge structure 10 is made so that the pressure at the outlet of the channels 12 in the deformation process of printing material exceeds the pressure at the entrance of this channel.

For this purpose, the total hydraulic (hydrodynamic resistance of the channel 12 should exceed the total hydraulic resistance of the channels 11 formed sub is kami between the projections ribbed structure 10.

The distance t1between vertices of adjacent protrusions or projections ribbed structure preferably is less than the minimum size, "and" dashed and/or dotted print element 2, which provides for printing a guaranteed break the paint layer, at least one area of the working surface 9 of the projection ribbed patterns in the printed item 2.

Rib structure 10 may have a systematic structure or parts of different systematic structure in the sense that the location and geometry of the protrusions may be subject to certain dependencies.

In particular, the rib structure 10, open in the area, for example, spot printing elements can have a bitmap structure. This allows more image effects imprint spot elements.

The protrusions 9 a ribbed structure 10 can be oriented in the direction of the greatest length of the area occupied by the printing element or group of printing elements forming a complete semantic fragment.

The depth h of the gaps between the protrusions is preferably larger than the distance between them or step ledges that provides the best conditions for the rupture of the paint layer.

Rib structure or, at least, the plot ribbed structure can be SF is mirovni on the inner surface of the first layer 5, and on the inner surface of the second layer 6 in the areas that are open, for example, circuit elements 2 formed raster structure or surface.

Such embodiment few impairs the ability of the printing form to reduce the graininess of paint in the process, but provides additional image effects imprint spot elements to protect the printed image from a fake.

7 shows another variant of embodiment of the printing form 1 with the grid 13 of the weave. The first layer 5 of this form consists of electroplating (Nickel) grid 16 with cells 17 on which irrigation applied polymeric material 18.

The printed form may contain on the first functional layer 5 sublayer 19, for example, in the form of precipitated Nickel to increase the run length of the printing form (figure 10).

Through the above-described printing forms implemented method of printing in which the working surface of the printing form under pressure in the printing process in contact with the receptive surface of the transfer to it of the paint layer, which is located in the printed elements.

Before creating a printed contact the working surface "C" of the printing form 1 with the receptive surface of the cavity of the printing elements 2 are filled with paint from the side of the working surface Il is on the opposite side.

In the case of applying the paint to the work surface (roller or other appropriate means) the excess paint is removed from the space of sections of the form using Vechernij devices.

When filling out the printed elements 2 paint from the opposite side it is served by the supply channels 12 from the supply system of the ink (not shown).

In the process of printing pressure, printing provides elastic and/or plastic deformation of the receptive surface, which selects the surface of printing material or offset surface from which the paint layer is transferred onto the surface of printing material.

When direct transfer ink layer directly on the printed material one chooses the value of the pressure at which it can receive elastic and/or plastic deformation.

Plastic deformation, which is obviously invalid offset transfer, which is selected in such a pressure that provides for a given offset material only elastic deformation.

In the process of contact of the working surface "C" of the printing form 1 with the receptive surface redistribute paint communicated between the printing elements by the pressure receptive surface for the paint layer when the deformation in the print elements under pressure is the group of printing.

While the paint layer, which is in the cavity of each printed item 2 with item 4, is broken by the working surface 9 of the element 4, at least two parts.

When direct transfer of the paint layer from the printing plate to the paper last under the pressure of the printing partially pressed into the filled ink printing elements 2. Paint, located in between the element 4 and pressed in the print element of the paper is compressed with changing patterns of paint on a less grainy due to the rupture of the paint layer on the working surface 9.

Along with the rupture of the paint layer is a redistribution of ink between adjacent print elements 2 through the channels funds to redistribute paint.

Subsequent separation of the paper from the printing form was up to this point in the printed elements 2 form the ink remains on the paper surface. The resulting print has a colorful layer formed by "short string", and includes spaced apart printed dots and/or lines and/or areas (die).

Under the action of pressure, as with metallographic printing paper 5 is additionally subjected to embossing, and its reverse side gets relief structure.

When a sufficient depth of printing elements 2 depending on the thickness of the "a" layer 5 on a paper cut is ltate her stamping and transfer it paints the result is a print with a distinct touch of a relief structure. Available from image areas of the paper are in the process of printing, sealing, and anti-aliasing.

As the printed material can be any suitable for the manufacture of securities of the material.

Similarly, the printing process can be carried out using the grid 13 or ribbed structure 10 as a means to break the paint layer and the redistribution of ink in the printed elements 2.

In this case, the paint is pressed in the printed item paper by pressure, for example, the elastic presser plate 8, is compressed with changing patterns of paint on a less grainy due to the rupture of the paint layer on the filaments 14 of the grid or on the ledges of a ridge structure 10.

Along with the rupture of the paint layer on the threads of the mesh or ledges ribbed patterns, there is a transfer of ink between adjacent print elements 2 through the channels formed by the weave 14 or between the projections ribbed structure 10.

Printed forms containing layers of mesh or honeycomb structure can be manufactured, for example, according to the traditional technology of production of screen printing forms of solid materials with attached mesh. The form can be obtained on the metal cut-out basis, or in a similar way, while the first and W is Roy functional layers are attached to the grid or mesh layer on both sides, providing necessary strength.

Such printing plates can be obtained by electrolytic deposition of metals on the galvanic grids made with engraved matrices, and galvanic increasing metal, such as Nickel, on the parts of the mesh or porous layer with the formation of end-to-end printing elements and the subsequent attachment of such a "sandwich" to the material of the second functional layer mesh or mesh layer or in another convenient technological sequence.

The device, which can be implemented with application of the described printing forms, presented on 11 and 12.

Printed form 20 (11), manufactured according to the above-described structural performances, mounted on the plate cylinder 21. Applying ink to the printing plate 20 is colorful roller 22, and the excess paint is removed using vechernego device, such as a squeegee 24.

Direct transfer plate image from the plate cylinder 21 to the paper 7, located on a printing cylinder 23 may be accomplished in one cycle. In the process of printing pressure of the printing cylinder onto the paper in the printing elements of the printing form 20 is a redistribution of paint and changing its structure as described above.

On Fig the circuit device is TBA for offset transfer colorful image.

To the printing plate 20 located on the plate cylinder 21, the paint is applied using colorful roller 22, the excess paint is removed by the squeegee 24. From the printing plate 20 colorful image is transferred to the offset surface 26 of the offset cylinder 25 and then to the paper 7, located on a printing cylinder 23.

The variant of the device, in which the ink is first applied to the pattern for sample submission to the printed form 20.

The ink in the printing elements of the printing plate 20 can be made from the opposite working surface shaped side channels, lead paint to print items from the supply system of the ink (not shown).

1. Printed form containing the working surface, the contact pressure in the printing process with the receptive surface for transfer to it of the paint layer, which is located in the printing elements, wherein at least two of the printing element communicated among themselves under the work surface by means of redistribution of paint between them due to the pressure of the receptive surface on the paint layer when the deformation in the print elements under the pressure of printing.

2. Printing form according to claim 1, characterized in that at least one of the communicated printing elements has the facility for breaking KRA the internal layer, made in the form of at least one element that separates the cavity of this printing element, at least two parts and designed to interact with the receptive surface when it is deformed under the pressure of printing.

3. Printing form according to claim 1, characterized in that the means for the redistribution of paint made in the form of at least one channel, informing the cavity of the printing elements.

4. Printing form according to claim 1, characterized in that it has channels, lead paint from the system inking means for the redistribution of paint.

5. Printing form according to claim 4, characterized in that the channels that lead paint is made cylindrical and/or slit-like.

6. Printing form according to claim 4, characterized in that the supply canals paint, grouped by the color of the paint supplied from the paint flow, in accordance with the color image.

7. Printing form according to claim 1, characterized in that it has at least two functional layers, of which the first printed layer is made with the working surface and through the printing elements, and a second support layer on its inner side adjacent to the first layer, is exposed through the printing elements of the bottom areas of the printing elements.

8. Printing form according to claim 7, characterized in that the first and the second function is based layers are made respectively in the form of printed and base plate made of metal.

9. Printing form according to claim 1 or 7, characterized in that the means for the redistribution of paint made in the form of a guaranteed backlash between the first and second layers.

10. Printing form according to any one of claims 1 to 4, characterized in that the channels, lead paint, and means for redistribution paints are designed to ensure that the outlet pressure of the supply canals paint in the deformation process of the receptive surface is greater than the pressure at the entrance of this channel.

11. Printing form according to claim 1 or 7, characterized in that the means for the redistribution of paint made in the form of forming the channel grooves on one or both adjacent or located with a gap to each other, the inner sides of the functional layers

12. Printing form according to claim 1 or 7, characterized in that the means for the redistribution of paint made in the form of channels formed by grooves on the inner side of the second functional layer.

13. Printing form according to claim 1 or 4, characterized in that the total hydraulic resistance of the channel, lead paint, exceeds the total hydraulic resistance of the channel means to redistribute paint.

14 Printing form according to any one of claims 1, 2, 4-7, characterized in that the means for breaking the paint layer and a means for redistribution to the ASCI in the printed elements are in the form formed by the weave of the mesh, placed between the first and second layers.

15. Printing form according to 14, characterized in that the channels, lead paint, and mesh are geometrical parameters, in which the output pressure of the supply canals paint in the deformation process of the receptive surface is greater than the pressure at the entrance of this channel.

16. Printing form according to 14, characterized in that the channels, lead paint, and mesh are geometrical parameters, in which the deformation process of receptor surface the difference between the pressure unit and the output pressure of the supply canals paint, provides pressure in the contact area of the grid with the layers not exceeding the yield strength of the material of the grid and layers.

17. Printing form according to 14, wherein the mesh is made of metal or polymer.

18. Printing form according to 17, characterized in that the thickness of the grid defined twice the diameter of the threads of the weave, is not less than 0.08 mm

19. Printing form according to any one of claims 1, 24-7, characterized in that the means for breaking the paint layer and a tool for the redistribution of ink in the printed elements are in the form of a ridge structure on one or both adjacent to each side of the functional layer.

20. Printing form according to claim 19, characterized in that the channels, lead paint, and ribbed article is ucture have geometrical parameters, when the output pressure of the supply canals paint in the deformation process of printing material exceeds the pressure at the entrance of this channel.

21. Printing form according to claim 19, characterized in that the channels, lead paint, and rib structure are geometric parameters, at which the total hydraulic resistance of the channel, lead paint, exceeds the total hydraulic resistance of the channels formed by the spaces between the tabs of the ribbed structure.

22. Method of printing in which the working surface of the printing plate in the printing process is in contact under pressure with the receptive surface of the transfer to it of the paint layer, which is located in the printed items, including the completion of the printed elements paint, characterized in that at least two of the printing element of the printing form to report each other under the work surface, after filling of the printing elements of the paint in the process of contact of the working surface of the printing form with the receptive surface redistribute paint communicated between the printing elements by the pressure receptive surface for the paint layer when the deformation in the print elements under the pressure of printing.

23. A printing method according to item 22, wherein at least one of the reported icatibant tear the paint layer due to the interaction of receptor surface during its deformation, at least one element dividing the cavity and, accordingly, the paint layer of the printing element on the at least two parts.

24. A printing method according to item 22, wherein the pressure value when printing choose from a condition of providing the elastic and/or plastic deformation of the receptive surface.

25. A printing method according to item 22, wherein as a receptive surface select the surface of the printing material.

26. A printing method according to item 22, wherein as the receptive surface is chosen offset surface from which the paint layer is transferred onto the surface of printing material.

27. A printing method according to item 22, wherein the filling of the printing elements of the paint carried out by the working surface of the form.

28. A printing method according to item 22, wherein the filling of the printing elements of the paint carried out from the side, the back side of the working surface of the form.



 

Same patents:

FIELD: machine building.

SUBSTANCE: invention pertains to a protective element for different products, including bank notes, security papers, credit cards, documents, certificates and similar products, to the method of making it, as well as to protective elements from counterfeit material and valuable documents, equipped with a protective element. The protective element has several layers, each of which has defined, but different for each layer, optical properties such as colour, reflection properties, transparency, and density. At least one external layer is made with projections, located in a defined and/or arbitrary order. The lower layer is solid, and all layers together form a multilayer structure with a volumetric netlike and/or chess and/or honeycomb and/or cellular and/or linear configuration in form of patterns, symbols, drawings, marks and codes. The construction forms at least one effect yielding a visual and/or automatic control.

EFFECT: making of a simple and accessible protective element with optimised protective properties.

39 cl, 3 dwg, 4ex

FIELD: printing.

SUBSTANCE: invention pertains to the method of printing a protective element from counterfeiting, the protective element and to valuable documents with the above mentioned protective element. The method of printing the protective element from counterfeiting of security papers, for example, banknotes and other similar document on a substrate lies in that, a certain background is printed on the substrate. A certain figure is printed, at least partially covering the above mentioned background, using an opaque optically changing printing dye. The above mentioned figure is made with using the screen printing process, or flexographic method or photoengraving using the corresponding sieve, anilox roller or printing form. The fineness of the given structure or lieature is chosen in such a way that, the printed figure is semitransparent, while the background can be seen through this figure.

EFFECT: higher degree of protection from counterfeiting and copying the protective element, and consequently the security papers.

10 cl, 4 dwg

FIELD: information carriers, and methods for manufacture thereof.

SUBSTANCE: falsification-protected information carrier has at least one section, imprinted using metallographic printing method, consisting of profiled lines, which constitute an image. Given profiled lines have colored layer on part of their length and are made with production of non-imprinted continuation, while a smooth color transition is formed at the boundary between imprinted and non-imprinted section of line.

EFFECT: ensured high degree of protection of polygraphic products from falsification, with simple technology for manufacturing it.

2 cl, 1 dwg

FIELD: polygraphic products, in particular, methods for its manufacture, possible use for manufacturing various types of securities.

SUBSTANCE: falsification-protected information carrier has at least one section imprinted using metallographic printing method, which consists of profiled lines which constitute an image. The imprinted section is made of profiled lines, colored along whole length, alternating with profiled lines, having colored and non-colored profiled sections along their length.

EFFECT: ensured production of falsification-protected information carrier with an image, which is used for visual or machine-readable control of authenticity.

4 cl, 4 dwg

FIELD: polygraphy, method for manufacturing polygraphic product which requires identification and confirmation of authenticity, for example, during manufacture of securities and valuable documents.

SUBSTANCE: method for determining authenticity of polygraphic product on basis of concealed information in printed image includes marking, encoding of input image using a program in computer system, decoding of printed image. Marking and encoding of input image are performed by changing optical density of internal areas of input image and following reflection of that change through printing elements of printing form in printed images in accordance to resolution of printing process. Alteration of optical density of internal areas of input image is performed according to given program with placement of changed areas across whole internal field of input image using doubled marks and encoded information on various internal sections of input image. During the check, reading of encoded information from printed image is performed, information is decoded and authenticity of polygraphic product is determined.

EFFECT: increased degree of protection of polygraphic product from forgery due to creation of concealed information, reproduction of which is difficult.

FIELD: printing technologies.

SUBSTANCE: steel printing form for deep printing contains on its surface at least one first section with printing structures, meant for producing an imprint by deep printing method, and at least one second section with structures intended for stamping, size of which is less than 100 micrometers. Parts of structures which are closest to the surface of printing form are positioned at a distance from 20 to 100 micrometers below level of printing form surface.

EFFECT: ensured stamping of securities and their simultaneous printing with usage of a single steel printing form for deep printing, and also high protection of securities from forgery is ensured.

9 cl, 15 dwg

FIELD: printing engineering.

SUBSTANCE: invention, in particular, relates to a method of printing allowing protection of printing materials against counterfeit reprints, for instance in fabrication of banknotes, shares, checks, and other valuable paper documents. Invention provides printing liquid for printing through narrow nozzles onto objects, in particular when fabricating banknotes, shares, and checks, which liquid comprises carrying medium and nanoparticles of metal salts in the form of crystalline solid particles having average diameter less than 300 nm, which fluorescent and phosphorescent when excited by UV emission of the A, B, or C band, or visual light, while emitted fluorescent and phosphorescent waves do not lie in the visual light frequency region and excitation frequency region and emission frequency region are shifted in frequency scale. Nanoparticles contain enhancing additives of at least one type having excitation and emission frequency ranges corresponding to fluorescence and phosphorescence. Provided is also printing method including injecting of above-described liquid(s) through one or several narrow nozzles, which are regulated individually or by groups in relation to availability or lack of printing liquid and in relation to duration or intensity of flowing of printing liquid. Printing method is either piezoelectric method or jet printing one. Employment of proposed liquid for ink-pots and object marking, in particular when fabricating banknotes, shares, and checks involving printing equipment provided with one or several narrow nozzles is also described.

EFFECT: increased reliability of protection.

15 cl, 2 dwg

FIELD: valuable paper securities and method for manufacturing of valuable paper securities protected from counterfeit.

SUBSTANCE: method involves introducing protective member formed as figured metallized polymeric thread onto net of netted cylinder of papermaking machine; dehydrating while forming face layer from pulp; pressing. Thread has central core and wing-shaped side members. During pressing, protrusion of thread wing ends above net surface onto paper surface, along at least one edge of figured thread by means of said members is provided, so that intermittent line is formed with constant or varying intervals between ends of thread wings.

EFFECT: enhanced protection of valuable paper securities from counterfeit.

6 cl, 13 dwg

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

FIELD: protective elements for documents.

SUBSTANCE: protective element contains at least two adjacently positioned zones without metallic materials. One of aforementioned zones has a layer of material, light refraction of which changes with change of light falling angle. Another zone has a layer of material with constant reflection. At least one of aforementioned zones forms sections without material for forming graphic markings and signs, which may be visually detected.

EFFECT: high degree of protection of securities from forgery with low costs of manufacture of protective element.

2 cl, 4 dwg

FIELD: technological processes.

SUBSTANCE: method of printing press cylinder cleaning, on which a layer of paint is deposited, which is transferred on printed material, such as paper, plastic film, etc., in which supply of cleaning liquid medium in the form of steam that is able to remove contamination from the corresponding area is provided to the surface of cleaned cylinder, and suction of mentioned contamination is provided from the cylinder surface. Mentioned steam is supplied under pressure in slightly inclined direction in respect to perpendicular to the cylinder surface via tip that is installed in the cavity of cleaning head, at that mentioned suction is carried out directly behind steam jet through the slot in mentioned cleaning head, which partially surrounds the tip and is installed on the external side of mentioned cavity. Device for printing press cylinder cleaning, in particular, flexographic printing press, contains head, which is installed along cylinder length and arranged with the possibility of movement along its axis, tip for supply of washing liquid medium in the form of steam to the area of cleaned cylinder surface, and suction facilities for removal of contamination that has been separated from the cylinder. Steam to tip is supplied under pressure from steam source, which is installed in cavity of mentioned cleaning head and which is oriented with provision of steam jet direction in slightly inclined direction in respect to perpendicular to the surface of cylinder, at that suction facilities represent suction slot, which is installed directly behind the tip, partially surrounding it from the external side of mentioned cavity.

EFFECT: perfect cleaning of cylinder surface without leaving traces of washing liquid remains; cheap and simple in design and may be used with paints of different type.

14 cl, 7 dwg

Painting apparatus // 2317896

FIELD: the invention refers to a painting apparatus transferring paint to a forming cylinder with the aid of a duction shaft.

SUBSTANCE: the painting apparatus has a duction shaft, a scraper, pair of the walls of the paint box and a gear for displacing in the direction to external surface of the duction shaft, a gear for moving the duction shaft. The duction shaft is supported with an eccentric support with possibility of rotation. The scraper is located near the duction shaft. The distal end of the scraper forms a clearance relatively to the external surface of the duction shaft where paint must be fed. The pair of walls of the paint box is located in essence perpendicularly to the scraper and opposite to each other with a clearance in the axial direction of the duction shaft and is supported with possibility of moving in the direction to the external surface of the duction shaft and from it. The gear for moving the duction shaft turns the eccentric support for moving the duction shaft. The pair of walls of the paint box is displaced in the direction perpendicular to the line connecting the axis of the duction shaft and the turning center of the eccentric support.

EFFECT: reduces wastes of paper.

11 cl, 9 dwg

FIELD: polygraphic industry, possible use for controlling technological parameters of paper flat of input roll on printing factories, which is formed in advance at paper factory.

SUBSTANCE: in the method, length of flat part of input roll, which includes control marks, is selected as controlled parameter. Marks are positioned with constant value step, which is selected depending on technologically acceptable error relatively to length of roll flat, regulated by its tensioning during technological cycle of creation of this roll at paper factory. Detection, recognition and registration of informative signs of controlled parameter is performed twice. Namely: during insertion of a roll into technological zone of roll printing machine and during removal from it. Recording of read and transformed information in memory block of electronic computing device is performed with ensured storage of that information and its possible output to information carriers, which are functionally a "roll report" with given database, based on "roll passport" information. Particularities of the system are as follows. It is provided with second block of optic-electronic devices, functionally and structurally identical to first block. One block is mounted at the point of insertion of a flat into technological zone of roll printing machine, second one - at exit point of same. Each block has commutated connection to its own electronic computing device. In front of each block, flat speed sensor is mounted, in commutated connection with corresponding electronic computing device. Software of one of the blocks is created with possible creation of database of input roll flat, and of another block - of output roll flat, and with possible storage of that information in memory blocks and its output to information carriers, which functionally act as "roll reports".

EFFECT: possible control of technological parameters of flat at input and output of roll printing machine, resulting in increased precision of control.

2 cl, 5 dwg

FIELD: method and device for colored flexography.

SUBSTANCE: method for applying multiple paint layers onto a substrate includes following stages: application onto a substrate of at least one painting layer of energy-hardened liquid paint with viscosity less than approximately 4000 centipoises, and including reaction-incapable paint thinner, where applied layer of energy-hardened paint has first viscosity; evaporation of at least a part of reaction-incapable paint thinner from applied paint layer for increasing viscosity of applied layer of energy-hardened paint; application onto substrate and applied layer of energy-hardened paint with increased viscosity of at least one layer of non energy-hardened liquid paint, viscosity of which is less than increased viscosity of previously applied layer of energy-hardened paint; and drying of both paint layers on the substrate. Another variant of method for applying multiple paint layers onto a substrate is differentiated by applied layer of energy-hardened paint having to be of increased viscosity compared to following layer of energy-hardened liquid paint with viscosity less than approximately 4000 centipoises, and containing reaction-incapable paint thinner, where viscosity of following layer is less than increased viscosity of energy-hardened paint layer applied beforehand. Also a method is suggested for printing multiple paint layers on a substrate, which includes stage of selection of first and second energy-hardened liquid flexography paint, where each paint contains viscosity controlling reaction-incapable paint thinner, consisting of water in amount of from 5% to 50% of thinner weight, where each paint has viscosity approximately ranging from 30 to 70 centipoises, and stage of serial application of first and second energy-hardened liquid flexography paint onto a substrate to create first and second paint layers, having overlapping parts, where second paint is applied only after at least a part of paint thinner is evaporated in first paint layer. Device for serial application of multiple overlapping paint layers onto a substrate contains substrate route and substrate drive for moving the substrate along a route, where paint application sections are adapted for applying paint onto substrate, which paint includes reaction-incapable paint thinner and has viscosity less than 4000 centipoises, and also management system, which manages transportation of substrate along a route. Viscosity of first layer of liquid paint, applied onto a substrate in one of paint sections, is increased due to evaporation of at least a part of paint thinner from first paint layer to higher viscosity compared to viscosity of second paint, applied on top of first paint layer in next paint section, located at a certain distance from first paint section, up to viscosity, sufficient for "crude" application of second liquid paint layer during transportation of substrate between paint sections.

EFFECT: in suggested methods, relief printing is achieved without insignificant modifications of printing equipment.

4 cl, 2 dwg

FIELD: printing form for printing of, in particular, securities and documents, and a printing method.

SUBSTANCE: printing form contains, at least, two functional layers 1 and 2, first one of which is made with through printing elements 3 and 4 for transferring painted image directly onto carrier material 5. Printing form has means 8 for tearing paint layer and redistributing paint in printing elements between layers, which means may be made in form of a mesh or honeycombed structure between layers 1 and 2. In accordance to invention, printing method includes transferring form pattern onto carrier material by means of described printing form, while during printing pressure is created in printing zone, value of which exceeds the yield point value of the carrier material.

EFFECT: possible creation of imprints, analogical to metallographic printing imprints, with more complicated structure and increased degree of protection from forgery; improved quality of imprints due to decreased probability of spraying of paint across space sections of form during printing, and also due to fine-grain structure of imprint surface with high productivity and possible use of broad assortment of painting materials.

4 cl, 12 dwg

FIELD: engineering of blanket units for offset cylinder of rotation printing machine and method for manufacturing the same.

SUBSTANCE: blanket unit has carrying plate (02) and blanket sheet (03) clamped on external side of carrying plate. Head and/or tail end of carrying plate may be held on the cylinder by bent side (04; 06), free of blanket surface, on offset cylinder. Filling mass (13; 14) is positioned between inclined edge and internal side of blanket surface. Filling mass may be applied onto carrying plate with following clamping of blanket surface. Filling mass may also be injected between the plate and blanket surface clamped on it.

EFFECT: ensured transfer of printing paint onto imprinted material with good quality in zone of gap between ends of blanket sheet enveloping the cylinder.

3 cl, 12 dwg

FIELD: polygraphic industry, in particular, technique for processing of perfected paper sheets, in particular, bonds.

SUBSTANCE: apparatus has device for sequential feeding of sheets, transportation means, means for processing of said sheets, and means for sorting out of sheets into at least two paper sheet stacks. Indicated parts of apparatus are sequentially arranged in direction of advancement of said paper sheets. Means for processing of sheets has first print quality controlling device, device for applying series numbers and/or additional members onto sheets, second print quality controlling device adapted for controlling of applied numbers and/or images of additional members, and sheet marking device actuated in response to data generated by first and second print quality controlling devices for marking of sheets rejected by said first and second print quality controlling devices.

EFFECT: increased efficiency in carrying out of complex or part of said operations and provision for high-degree controlling of print quality.

12 cl, 5 dwg

FIELD: operative color control in printing presses for used primary and auxiliary colors by continuous conducting of spectral measurements in conjunction with linear equations for determining the required correction of printing ink feed for conservation of color precision in printing.

SUBSTANCE: when the color anomaly is exceeded, the measured values of the spectral reflectivity of the tested area are compared with the respective preset values, and the anomaly of the reflection spectrum is determined. The linear equations are used for correlation of the reflection spectrum anomalies with varieties of the solid ink density or thickness of the ink layer for ink feed control with the use of an operatively empitically produced corrective matrix, such that the reflection spectrum is minimized.

EFFECT: provided color control during printing with the use of spectral measurements.

65 cl, 4 dwg

FIELD: equipment for applying concealed marks.

SUBSTANCE: paint mixer 1 is held and guided by stationary means under supports 2 and 3 above paint box, containing paint for applying concealed marks. Paint mixer is driven by changing direction on guiding means meant for it, and its end is dipped in paint. Into aperture 11 detector head is inserted in form of transformer with primary winding, meant to generate zero magnetic field, with adjustable ferrite core, mounted so that zero magnetic field is received for standard magnetic characteristic of printing paint for applying concealed marks, and with secondary winding, quitting balanced state and outputting a signal, if magnetic characteristic of printing paint, into which paint mixer end moves, changes. Output signal is sent to line 4 for transferring signal via sliding contact 6, while grounded pole is connected by means of wire 5 and sliding contact 7.

EFFECT: higher efficiency.

2 cl, 10 dwg

Holding device // 2262450

FIELD: mechanical engineering.

SUBSTANCE: device is used for holding device with two construction elements moved relatively to one another in at least one direction, while at least one portion of holding device is connected to first element and at least another portion is connected to second element while portions of holding device are made with possible engagement under effect from friction locking. Holding device has at least three serially placed plated elements, which are connected in series to one portion or other portion of holding device. Each plated element by at least one friction surface is positioned with possible abutment to friction surface of adjacent plated element and plated elements for holding are made with possible pressing relatively to each other by pressing means. Plated elements are made with possible progressive motion relatively to one another in plane predetermined by friction surfaces.

EFFECT: decreased dimensions.

9 cl, 6 dwg

FIELD: dosage system for paint rolling on printing rollers.

SUBSTANCE: the system has at least one chain of shafts leading to the form cylinder. The shaft is made for application of paint or varnish on it from the paint reservoir. A smoothing out device (12) for provision of approximately flat structure of the surface of the remaining amount of paint or varnish for parallel delivery of the side surface of the paint varnish or a break of paint/varnish occurs in the direction of rotation of shaft (1-6) carrying the paint (varnish) or for delivery of the parallel side surface of this shaft (1-6) of the leveling out device (12).

EFFECT: provided uniform, stable conducting of paint onto the shaft surface, and improved quantity of printing.

14 cl, 5 dwg

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