Control system for sheet printing machine for double-sided printing

FIELD: printing industry.

SUBSTANCE: invention relates to the field of printing. Described system of sheets control, intended for sheet machine for double-sided printing of such type, comprises two printing cylinders, intended to do simultaneous double-sided printing of sheets, at the same time specified system of sheets control comprises at least the first control device to produce image of the first side of printed sheets. The first control device comprises the first linear shaper of image signals, intended to produce image of the first side of printed sheets by means of linear scanning. At the same time the first control device is arranged so that the first linear shaper of image signal visually produces image of printed sheet, while specified printed sheet still sticks to surface of the first of two printing cylinders of printing machine, and directly prior to displacement of specified printed sheet into chain system with grips provided in printing machine. Also printing machine equipped with control system is described.

EFFECT: invention makes it possible to provide for efficient prevention of sheets smudging in process of control.

12 cl, 3 dwg

 

The technical field to which the invention relates.

The present invention generally relates to a control system for a sheet-fed printing machine for duplex printing. More precisely, the present invention relates to such a control system for sheet-fed offset printing machine for duplex printing.

Background of invention

Sheet-fed printing machine for double-sided printing is known in the art, in particular, to perform simultaneous two-sided printing on sheets or canvases.

In the patent Switzerland CH 502897 disclosed printing machine for multi-color two-sided printing, designed for simultaneous bilateral offset printing. The machine has two offset cylinder in contact with each other for the formation of contact areas of the print, which is printed on paper, with each offset cylinder carries make sure that rolled paint patterns to be applied to the paper. Make sure that rolled paint patterns are formed on the surface of the offset cylinder by means of two groups of devices to roll the paint and plate cylinder. The leaves, which should be printed, serves to place the seal located between the two offset cylinders, and move, and when printed to Listvyanka system, as a rule, to the so-called zany listovidnyh systems with grippers, contains many posted rods with clamps, containing a series of grippers for holding the front edges of the sheets. Another example of a similar printing machines can be found in the application for the European patent EP 0949069 A1.

In order to ensure a sufficient level of print quality, it is often desirable to perform the control of the freshly printed sheets to the printing machine. As a rule, in this case we speak of internal control in contrast to Autonomous control, in which the sheets are controlled separately from the printing machine or machines on which they were printed. Embedded control systems are described, for example, in applications to the European patent EP 0527453 and EP 0576824. Application EP 0576824, in particular, describes the built-in control system that is designed to perform control on the machine for two-sided printing. In this example, control is performed in the path of the moving sheets between the printing section and Listvyanka section of the printing machine.

The implementation of built-in control on the machines for two-sided printing is quite difficult, because the fresh paint is applied when printing on both sides of the printed sheets. Indeed, to perform control necessary to ensure that during the control printed sheet is subject to the control, or, at least, part of it was(and the corresponding clicks the zoom is(-a) relative to the base reference. When using the machine for single-sided printing side of the sheet, which was not applied fresh paint, can be attached to the base surface, usually by suction means, and the control of the other side of the sheet is performed while the sheet is held at the base surface. A similar solution is described in the aforementioned application for the European patent EP 0527453. When using machines for duplex printing, this solution can be provided only if the side of the sheet, which is pressed against the base surface was pre-dried. Otherwise, the contact of the freshly printed side of the sheet with the base surface would cause blurring and therefore unrecoverable deterioration of the print quality on this side of the sheet.

The solutions proposed up to the present time to perform built-in test on the machines for two-sided printing, as a rule, lie in the placement of the control system on the trajectory of output sheets in the printing machine, as proposed in the application for the European patent EP 0576824. Additional examples [implement] a similar principle can be found in the applications to the European patent EP 1142712, EP 1167034 and EP 1323529. However, the problem with such solutions is the increased complexity of the printing machine. This is especially valid is Ivo for solutions, described in documents EP 1142712, EP 1167034 and EP 1323529 that require two separate systems of transportation of the sheets, and it is the first system designed to move the sheets from the printing section to the control system of the sheet, and the second system designed to move the sheets from the control system to Listvyanka section.

Another problem associated with solutions of prior art, lies in the increased length listvintage way, due to the presence of the control system of the sheet, which results in increasing the area occupied by the printing machine as a whole.

Therefore, there is a need for a less complex and more compact solution.

The invention

Thus, the purpose of the invention is to improve the known systems of control sheets for machines for duplex printing.

More precisely, the present invention is to develop a solution that does not cause a substantial increase in the complexity of the printing machine and which, moreover, can be implemented in existing presses without significant modifications.

Another objective of the present invention is to develop a solution that is not necessary to increase the length of the path of movement of the sheets between the printing section and Listvyanka section.

Another objective of the present invention is to develop solutions that can provide effective prevention lubrication sheets during the control.

These objectives are achieved through the control system and the printing machine defined in the claims.

In accordance with the invention is designed more compact solution which does not require any increase in the area occupied by the printing machine, in comparison with the machine without supervision. In addition, the control is in place, directly following the printing operation, and at a time when the printed sheets still stick to the surface of one of the printing cylinders. Thus, the acuteness of the problems of lubrication is reduced to a minimum.

Preferred embodiments of the invention are subject of the dependent claims.

Brief description of drawings

Other characteristics and advantages of the present invention will become more apparent when reading the following detailed description of embodiments of the invention, which are presented only as non-limiting examples and illustrated by the attached drawings, on which:

figa and 1B are views of a side sheet printing machine for double-sided printing, designed to perform simultaneously the constant two-sided printing of sheets, while specified printing machine is equipped with an integrated control system in accordance with the first embodiment of the invention;

figure 2 is a side view of a sheet printing machine for double-sided printing, a similar machine according figa and 1, showing the first configuration of the machine in accordance with an additional embodiment of the invention; and

figure 3 is a side view of a sheet printing machine for double-sided printing according to figure 2, showing a second configuration of the machine.

Embodiments of the inventions

The invention will be described below in connection with sheet fed offset printing machine for printing securities, in particular banknote. As will be evident from the following, different ways of implementation, illustrated in the drawings, based on the total configuration of the machine with the same printing group, adapted for simultaneous bilateral offset printing plates. This print group is essentially the same as printing group, as described in the application for the European patent EP 0949069, which is incorporated in this application by reference. However, it should be understood that the printing group can be adapted to perform printing in accordance with other printing methods.

Figa and 1B are views of a side sheet of the CFC is Noah printing machine control system in accordance with the first embodiment of the invention. The printing machine group, which in this case is made with the ability to perform simultaneous bilateral offset printing sheets, contains the usual two offset cylinder (or printing cylinder) 10, 20, which rotate in the direction of the arrows, and between which are served in order to obtain the multi-color prints. In this example, the offset cylinders 10, 20 are cylinders with three segments, i.e., the cylinders having a length of sweep, approximately three times the length of the image on the print on the sheets. Offset cylinders 10, 20 receive different make sure that rolled paint pictures with their corresponding colors with the plate cylinder 15 and 25 (four on each side), which are distributed around the circumferential periphery of the blanket cylinders 10, 20. Data plate cylinder 15 and 25, each of which carries the appropriate printed form, are covered with paint by appropriate colorful devices 13 and 23, respectively, known in the art by the way. Two groups of colourful devices 13 and 23 preferably are located in two carriages colorful devices that can move to a centrally located plate cylinder 15, 25 and blanket cylinders 10, 20 or from them.

The sheets fed from the feeder 1, which is located on the right side of the printing group, n is an invoice table 2 and then to sequence the transfer cylinders 3 cylinders in this example), located in front of the blanket cylinders 10, 20 in the direction of travel of the sheets. During transport through the transfer cylinder 3 sheets, if necessary, you can apply the first imprint on one side of the sheets through the use of an additional printing group (not illustrated), as described in document EP 0949069, one of the transfer cylinders 3 (namely, a cylinder with two segments on figa) performs an additional function of the printing cylinder. In that case, when the printing sheets is made possible through the additional printing group, they are first dried before moving to the offset cylinders 10, 20 for simultaneous double-sided printing. In the example according figa and 1 In the leaves move on the surface of the first printing cylinder 10, where the leading edge of each sheet is held corresponding gripping means located in recesses in the cylinder between each of the segments of the offset cylinder. Thus, each sheet is moved through the first offset cylinder 10 to the printed area of contact between the blanket cylinders 10 and 20, where there is a simultaneous two-sided printing. Being printed on both sides, the printed sheets are then moved, as is known in the art, to a chain system with 5 grabs for o in s is a s 6 of the receiving sheet, containing a host of stocks (three in this example).

Chain system 5 with seizures, usually contains two chains, holding many posted rods with hooks (not shown), each of which is provided with a series of grippers for holding the leading edge of the sheets. In the example according figa chain system with grippers passes from the areas under the two blanket cylinders 10, 20 through the outdoor part of the printing machine and to zone over three foster stocks section 6 acceptance sheets. Bars with grips are moved along the path in a clockwise direction, while the trajectory of the chain 5 with clamps passes from the printing group to section 6 of the receiving sheet while it passes under the trajectory of the return chain system 5 with seizures. Drying means 7 are located along the path of the chain system with hooks for drying both sides of the leaves, and the drying is performed through the use of infrared lamps and/or lamp ultraviolet radiation depending on the type of paint. In this example, the drying means 7 are located at the vertical part of the chain 5 with grippers, where bars with grips are sent from the outdoor part of the printing machine to the upper part of the section 6 acceptance of leaves.

The two ends of the chain system 5 clamps, and they are the NGOs under the blanket cylinders 10, 20 and most distant from the centre, the left-hand part of the section 6 acceptance sheets, provided by a pair of sprockets 51 and 52.

In the example according figa and 1B two sprockets 51 are located in the immediate vicinity of the first offset cylinder 10 so that the printed sheets can be removed from the surface of the first printing cylinder 10 and moved directly into the chain system 5 with seizures. As will be explained below, in accordance with the preferred embodiment of the invention, two asterisks 51 can be located in a place where they are not located next to the first blanket cylinder 10 to provide space for one or more transfer cylinders between the offset cylinder 10 and the chain system 5 with seizures.

If we turn now to the control system, you can specify that the printing machine shown in figa 1, further provided with a first control device 100 to obtain an image of the first side of the printed sheets. As illustrated in more detail In figure 1, this control device 100 includes the first linear driver 110 signals of the image (line image sensor)designed for receiving the image of the first side of the printed sheets by linear scanning. "Retrieving images by linear scan ("lin-scanning image acquisition") should be understood as the process of retrieving images, upon the surface or object is scanned line by line, and the full image of the surface or object is reconstructed from a set of scanned sections of the lines. It should be understood that the images by linear scanning provides the relative offset of the linear imager relative to the surface or object whose image is to be obtained. In this example, the relative offset is achieved by rotation of the offset cylinder 10, the moving sheets to control.

More precisely, the first control device 100 is located so that the first linear driver 110 of the image signals visually receives the printed sheet at a time when the printed sheet still sticks to the surface of the first offset cylinder 10 of the printing machine and directly before moving printed sheet to the chain system 5 with seizures. In the embodiment, according figa and 1 In the first control device 100 further comprises a mirror 120 to reject the light flux of the linear driver 110 of the image signals on the surface of the printing cylinder. This mirror 120 preferably provides an opportunity for the placement and orientation of the first control device 100 is very compact in pechatnymi. More precisely, as in this embodiment, the sprocket chain 51 of 5 with seizures are a significant part of the available space directly beneath the blanket cylinders 10, 20, the mirror 120 provides the ability to "crawl" sprockets 51 and gain access to a part of a circumferential periphery of the printing cylinder 10 between the printed area of contact and transfer the sheets where the sheets are moved in a chain system 5 with seizures.

It turned out that the performance of monitoring at this location is preferred because the freshly printed sheet still sticks to the surface of the offset cylinder 10. Thus, use of the inherent offset cylinder ability to function as a base surface for execution control. In addition, fresh paint has the effect of adhesion, which prevents too easy separation of the sheets from the surface of the offset cylinder 10. Accordingly, there can be no problems with lubrication, since the sheet is still in contact with the printed form. In addition, since the distance between the printed area of contact and the point of transfer sheets is less than the length of the sheet, the control is performed at the time when the sheet is still held between the blanket cylinders 10, 20 at their contact areas of the print and/or perestaralsa sheet is held chain system 5 with seizures.

As shown in figa and 1B, the linear driver 110 of the image signals and the mirror 120 is located under the second offset cylinder 20 and are oriented so that the first area of the light flux of the linear driver 110 of the image signals passing between the first linear driver 110 of the image signals and the mirror 120, is approximately tangent to a circumferential periphery of the second printing cylinder 20, and that the second section of the light flux of the linear driver 110 of the image signals passing between the mirror 120 and the surface of the first printing cylinder 10 is approximately perpendicular to a circumferential periphery of the printing cylinder 10. The source 130 of lights additionally is located directly under the printed area of contact in order to cover the controlled area on the sheet transported offset cylinder 10.

Figure 2 is a side view of the sheet machine for double-sided printing, a similar machine according figa and 1B, in accordance with an additional embodiment of the invention, and this view shows only the printing group of the printing machine with its control system. The elements that are common with the design according figa and 1B are denoted by the same reference position. The only difference with respect to the version of the implementation according to the about figa and 1 is the implementation of additional support structures to provide support for the sprocket chain 51 of 5 with grippers, as well as additional gear cylinder (not shown in figure 2). In figure 2 there are four pillars, which are indicated respectively by the reference positions 301, 302, 303, 304. In figure 2 only supports 302 are used to provide support for two sprockets 51, similar to that shown in the embodiment according figa and 1 C. Other supports 301, 303 and 304 are used when the machine and the control system is transformed into the configuration shown in figure 3.

Figure 3 is a side view of the sheet machine for double-sided printing according to figure 2 with the following modifications:

- instead of placing it next to the offset cylinder 10 sprocket 51 is located in a place farther in the downward direction to provide space between the offset cylinder 10 and removal of leaves chain system 5 with seizures. In this case, the sprocket 51 is held between the supports 304;

the first transfer cylinder 60 is held between the supports 301 so that it was located next to the offset cylinder 10. This first transfer cylinder 60, which is located on the path between the offset cylinder 10 and the chain system 5 with grips made with the possibility of removing the printed sheets from the surface of the first printing cylinder 10 and placing the other side of the printed sheets at the position at which it converts to the WTO the WMD control device 200 to monitor; and

the second transfer cylinder 65 is held between the supports 303 so that it was positioned as close to the first transfer cylinder 60, and next to the sprocket chain 51 of 5 with seizures. This second transfer cylinder 65 ensures that the printed sheets are moved in a chain system with 5 clamps the same as in figure 2, that is, to move them in a clockwise direction by a chain system 5 with seizures. Essentially the second transfer cylinder 5 can be excluded, but in this case, the direction of the transportation chain system with grippers must be reversed.

As mentioned above, the configuration of the machine, illustrated in figure 3, is designed to provide two-way control of printed sheets. The first side of the sheets is controlled by the first control device 100 (as in other variants of implementation), while the other side of the sheets is controlled by the second control device 200.

The second control unit 200 also contains a line driver 210 of the image signals, intended for realization of obtaining images of the other side of the printed sheets by linear scanning. In this example, no mirrors, because the first choice of the transfer cylinder 60 provides the ability to host other side of the printed sheets in a position directly in front of the line driver 210 of the image signals. The source of light 230 is also located so as to properly illuminate the monitored area on the sheet transported by the transfer cylinder 60.

The transfer cylinder 60 (as well as the transfer cylinder 65) preferably is a cylinder with one segment that is designed to move the one sheet at a time, and preferably not processed receptive to the paint coating, or contains not receptive to the paint coating to prevent smudging of the printed sheets. Preferably, the transfer cylinders 60, 65 made in the form of a vacuum drum with built-in means for suction of the transported sheet to the surface of the cylinder. The problems associated with lubrication, essentially are not important in the example in figure 3, since the printed sheets directly transferred from the printing cylinder 10 to the transfer cylinder 60 and the transfer cylinder 60 to the other transfer cylinder 65. Problems with blur, sharpen, when the printed sheets are transferred from the conveying devices of the same type to the transporting device of another type, for example from the chain system with grippers to the cylinder, as proposed in the documents EP 1142712, EP 1167034 and EP 1323529, due to the necessarily existing differences speeds and inaccuracies speeds between the two systems is I.

It should be understood that according to embodiments of figure 2 and 3 show how the printing machine can be moved from one configuration to another without significant modifications.

In addition, it should be understood that various modifications and/or improvements obvious to those skilled in the art, can be made to the embodiments described above without departing from the scope of the invention defined by the attached claims. For example, although embodiments of show that freshly printed sheets are transported first offset cylinder 10, other decisions within the scope of the present invention may provide for the transportation of printed sheets by the second offset cylinder 20, which in this case will require minor modifications chain system 5 with grippers, namely modifications relating to the location of the two stars and the direction of transportation, provide chain system with grippers, which will be a counterclockwise direction, not clockwise. Thus, it should be understood that within the scope of claims the claims the expression "first printing cylinder and a second printing cylinder" may denote any of the two print what's cylinders. In addition, although the invention has been described in connection with a printing machine to perform simultaneous bilateral offset printing, the machine can perform simultaneous printing in accordance with other printing methods.

1. The control system leaves intended for sheet-fed printing machine for duplex containing two printing cylinder (10, 20)for performing simultaneous two-sided printing of sheets, with said system control sheet contains at least a first control device (100) for receiving an image of the first side of the printed sheets,
when specified, the first control device (100) includes a first linear driver (110) of the image signals designed for receiving the image of the specified first side of the printed sheets by a linear scan, and
when specified, the first control device (100) is located so that said first linear driver (110) of the image signals visually receives the printed sheet at the time when the printed sheet still sticks to the surface of the first (10) of these two printing cylinders (10, 20) of the printing machine and immediately before the movement specified printed sheet in the chain system is mu (5) with grippers, provided in the printing machine.

2. The control system of the sheet according to claim 1, in which the specified first control device (100) further comprises a mirror (120) for the deviation of the luminous flux specified first linear driver (110) of the image signals on a specified surface of the first printing cylinder (10).

3. The control system of the sheet according to claim 2, in which said first linear driver (110) of the image signals and the mirror (120) are located under the second (20) of these two printing cylinders (10, 20), and the first linear driver (110) of the image signals and the mirror (120) are oriented so that the first area of the light flux of the first linear driver (110) of the image signal passing between the first linear driver (110) of the image signals and mirror (120), is approximately tangent to a circumferential periphery of the second printing cylinder (20), and the second section of the light flux of the first linear driver (110) of the image signals passing between the mirror (120) and the surface of the first printing cylinder (10), approximately perpendicular to the circumferential periphery of the first printing cylinder (10).

4. The control system of the sheet according to any one of claims 1 to 3, in which the luminous flux of the first linear driver (110) of the image signals direction is to place on a circumferential periphery of the first printing cylinder (10), which is located just before the point of transfer sheets in which the printed sheets are removed from the surface of the first printing cylinder (10).

5. The control system of the sheet according to claim 4, in which the distance between the printed area of contact between two printing cylinders (10, 20) and the transfer sheet is less than the length of printed sheets.

6. The control system of the sheet according to any one of claims 1 to 3, further containing a second control device (200) to obtain images of the other side of the printed sheets, with the specified second control device (200) includes a second linear driver (210) image signals designed for receiving the image specified other side of the printed sheets by a linear scan, and the system control sheet contains at least one transfer cylinder (60; 65), located between the first printing cylinder (10) and chain system (5) with seizures and is designed for removing the printed sheets from surface of the first printing cylinder (10) and placing the specified other side of the printed sheets in a position where it will be converted to the specified second control device (200) for monitoring.

7. The control system of the sheet according to claim 6, in which indicated at least one transfer cylinder (60; 65) p is ecstasy a cylinder with one segment, designed to move the one sheet at a time.

8. The control system of the sheet according to claim 6, in which the surface of the specified at least one transfer cylinder (60; 65) are not processed receptive to the paint coating to prevent smudging of the printed sheets.

9. The control system of the sheet according to claim 6, in which the first and second transfer cylinders (60, 65) are located between the first printing cylinder (10) and chain system (5) with the clamps provided in the printing machine.

10. The control system of claim 6 sheets, in which indicated at least one transfer cylinder (60; 65) is made in the form of the vacuum drum.

11. Printing machine for double-sided printing, designed for simultaneous two-sided printing of sheets containing:
print group(10, 13, 15, 20, 23, 25) with the first and second contact printing cylinders (10, 20)designed for simultaneous printing on both sides of leaves, served in the printed area of contact between the first and second printing cylinders (10, 20);
chain system (5, 51, 52) with grippers, designed to move the sheets printed by the specified print group(10, 13, 15, 20, 23, 25), section (6) acceptance of leaves; and
the system (100; 200) of the control that is designed to run the built-in control of printed sheets,
if this is specified the system (100; 200) control is a system according to any one of the preceding paragraphs.

12. Printing machine for double-sided printing according to claim 11, in which the chain system (5) with grips contains two asterisks (51), located near the printing group(10, 13, 15, 20, 23, 25) to enable movement of the printed sheets from the printing group(10, 13, 15, 20, 23, 25) to chain the system (5) with grippers, and the specified printing machine contains two separate supports (302, 304), designed to provide support for these two stars (51), namely, the first support (302) to provide support for the two stars (51) in place of the asterisk (51) are located next to the first printing cylinder (10), so that the printed sheets can be removed from the surface of the first printing cylinder (10) and moved directly into the chain system (5) with grippers, and the second support (304) to provide support for the two stars (51) in place of the asterisk (51) are not located next to the first printing cylinder (10) to provide space for the two transfer cylinders (60, 65), which are arranged in series between the first printing cylinder (10) and chain system (5) with seizures.



 

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The invention relates to a set, designed for printing machines, in particular to Listvyanka device for time-lapse calculations sheets in printing machines

FIELD: printing industry.

SUBSTANCE: invention relates to the field of printing. Described system of sheets control, intended for sheet machine for double-sided printing of such type, comprises two printing cylinders, intended to do simultaneous double-sided printing of sheets, at the same time specified system of sheets control comprises at least the first control device to produce image of the first side of printed sheets. The first control device comprises the first linear shaper of image signals, intended to produce image of the first side of printed sheets by means of linear scanning. At the same time the first control device is arranged so that the first linear shaper of image signal visually produces image of printed sheet, while specified printed sheet still sticks to surface of the first of two printing cylinders of printing machine, and directly prior to displacement of specified printed sheet into chain system with grips provided in printing machine. Also printing machine equipped with control system is described.

EFFECT: invention makes it possible to provide for efficient prevention of sheets smudging in process of control.

12 cl, 3 dwg

FIELD: printing industry.

SUBSTANCE: invention relates to the field of printing. Described system of sheets control intended for sheet printing machine for double-sided printing of such type comprises two printing cylinders intended to do simultaneous double-sided printing of sheets. At the same time specified system comprises at least one control device to produce images of one side of printed sheets. System of sheets control comprises the first and second transmission cylinders arranged between the first of specified two printing cylinders and chain system with grips provided in printing machine. At the same time printed sheets are moved serially from the first printing cylinder to the first transmission cylinder, to the second transmission cylinder and chain system with grips. Control device comprises linear shaper of image signals intended to produce image of one side of printed sheets by means of linear scanning, at the same time this linear shaper of image signals visually produces image of printed sheet, while printed sheet moves on the first or second transmission cylinder.

EFFECT: invention makes it possible to provide for efficient prevention of sheets smudging in process of control.

6 cl, 3 dwg

FIELD: polygraphic engineering.

SUBSTANCE: method for printing of protected documents, in which the latters are printed on sheets, each containing a great number of protected documents. Each sheet has a unique type-readable identifier. In the process of production the lots are processed with the aid of several printing presses. On each printing press the identifiers are read off with the aid of a local computer separated for the given printing press. The results are transmitted by inquiry in the form of poles of data to the central data base. Each pile contains information on several sheets, which eliminates the necessity of transmission of the respective data in the conditions of real time through the network. To enhance the safety of reduction of dependence from operation, each local computer has a means of automatic checkup of the state of the lot processing.

EFFECT: checkout of printing production at a large enterprise at low requirements to hardware, software and computer circuit.

10 cl, 3 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: 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: 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: 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

Sensor device // 2335403

FIELD: physics.

SUBSTANCE: invention refers to fluorescing or phosphorescing print check and detection on sheets fed to printing press for securities printing. Luminescent sensor device contains set of subunits, optical sensitive elements, at that each subunit contains ultra-violet lighters for sample illumination, digital camera system containing front element, mirror assembly tracking light radiated from the specified sample to front element of digital camera system; and digital signal processor providing processing of signals, generated by the specified front element of digital camera system. Thus fluorescing or phosphorescing print check and detection system on security sheets contains luminescent sensor device.

EFFECT: improved control quality.

10 cl, 6 dwg

FIELD: printing industry.

SUBSTANCE: method for adjustment of inking apparatus (16) of printing machine consists in the fact that in phase of preparation of printing machine for printing the first measuring accessory (22) is used to identify at least one first measuring value versus the one adjusted on inking apparatus (16) of printing machine, applied at least on one material for printing (21) of ink application, besides based on this first actual value inking apparatus applying ink onto material is adjusted for printing (21). In phase of printing machine run printing the second measuring accessory (23), which varies from the first measuring accessory (22) is used to identify several second actual values related to imprint applied onto material for printing (21) and to deliver to the adjustment device (26) that adjusts inking apparatus (16). One of second actual values detected by the second measuring accessory (23) is used in adjustment device (26) as a specified value, at the same time adjustment device (26) detects deviation of other second actual values identified in phase of printing machine run printing from applied specified value, and this deviation is minimised by new adjustment of inking apparatus that applies ink onto material for printing (21).

EFFECT: invention makes it possible to improve quality of printing.

16 cl, 2 dwg

FIELD: printing industry.

SUBSTANCE: invention relates to the field of printing. Described system of sheets control, intended for sheet machine for double-sided printing of such type, comprises two printing cylinders, intended to do simultaneous double-sided printing of sheets, at the same time specified system of sheets control comprises at least the first control device to produce image of the first side of printed sheets. The first control device comprises the first linear shaper of image signals, intended to produce image of the first side of printed sheets by means of linear scanning. At the same time the first control device is arranged so that the first linear shaper of image signal visually produces image of printed sheet, while specified printed sheet still sticks to surface of the first of two printing cylinders of printing machine, and directly prior to displacement of specified printed sheet into chain system with grips provided in printing machine. Also printing machine equipped with control system is described.

EFFECT: invention makes it possible to provide for efficient prevention of sheets smudging in process of control.

12 cl, 3 dwg

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