Printing deckle with bulging makeup layer

FIELD: mechanics.

SUBSTANCE: invention is referred to offset printing industry. The printing deckle includes makeup bush layer (22) with at least one axially convex surface and another layer (26) being laid on top of the makeup bush layer. In addition, the outer layer surface for printing has bulging axial profile when deckle is on offset cylinder and pressure is missing. The offset printing machine contains cylinder for imaging, offset cylinder and printing deckle. In addition, the printing deckle is above the offset cylinder.

EFFECT: compensation of low pressure and prevention of inwardly directed folding.

19 cl, 13 dwg

 

The technical field to which the invention relates.

The present invention relates primarily to offset printing, and more specifically to printed Dekel for offset printing machine.

The level of technology

In U.S. patent No. 6283027 and 6105498 described the deckles AC profile, including printed deckles with convex and concave profiles. Also described convex offset cylinder.

In U.S. patent No. 5522315 and 5863367 described printed Dekel with convex compressible layer for distribution of rolled material and prevent inward folds. The mounting layer for this deckle flat.

Disclosure of inventions

The present invention is to compensate for the low pressure printing often found in the center of the offset cylinder while preventing inward folds.

In the present invention is proposed printed Dekel, containing

mounting the stub layer having at least one axially convex surface, when it is located on the offset cylinder; and

layer for printing, located on top of the mounting stub layer.

Through convex inside the mounting sleeve layer with the convex surface can increase the pressure of the printing in the axial center of the offset cylinder.

Convexo the TB mounting stub layer can be provided for example, by mounting the stub layer having a constant inner diameter and outer diameter, causing a bulge. Thus, the mounting stub layer in the axial mid thicker than at the ends.

In a preferred embodiment, a mounting sleeve may have a constant thickness and convexity of the surface can be provided with the offset cylinder or laying on it.

Layer for printing may have a constant thickness or a variable thickness. In the most preferred embodiment, the outer surface layer for printing has a concave axial profile when Dekel is located on the offset cylinder, although this is optional.

At the location of the deckle on the offset cylinder, it preferably provides a uniform axial pressure printing or pressure in the gap width mentioned deckle.

In a preferred embodiment of the invention between the mounting stub layer and a layer for printing is compressible layer. This compressible layer may have a constant thickness or a variable thickness.

Dekel is preferably in the form of a gapless tubular deckle.

Over the compressible layer and the under layer for printing can be provided inextensible layer, for example formed from intertwined fibers or textile fabrics.

The present invention also proposed offset printing machine containing cylinder for imaging, offset cylinder having axially convex outer surface, and a printed Dekel, located on this axially convex outer surface.

Also proposed axially profiled gasket for placement between the offset cylinder and Dekel, and this gasket is axially convex outer surface. The inner surface preferably has a constant diameter. The gasket preferably is tubular and solid.

The combination of the offset cylinder and deckle most preferred in the case of a narrow offset cylinder with a large axial length, because they are most susceptible to bending. So, Dekel preferably carries at least two images along the axis, and can carry at least three images in the axial direction, whereas in the circumferential direction, there is a possibility to carry only one image. The most preferred may be the option with four axial images.

Brief description of drawings

Further description of the present invention is given with reference to the drawings, which represent:

figa and 1B - embodiments of the convex offset cylinder with Dekel equal the RNA mounting the stub layer with the convex surface, schematically;

figa, 2B, 2C, 2D, 2E, 2F and 2G preferred embodiments of the deckle with a convex mounting stub layer, schematically;

figa and 3B - preferred embodiments of the combination of the offset cylinder, gaskets and deckle according to the present invention, schematically;

figa and 4B - medically clearance for preferred embodiments according figa and 2B, respectively.

The implementation of the invention

On figa schematically illustrates the offset cylinder 10, having a convex outer surface 11. This offset cylinder 10 may be made of metal, for example, of flat-rolled steel. The curvature of the outer surface 11 of the drawings excessively enlarged for clarity. On top of the offset cylinder 10 is Dekel 20, for example, by axial sliding, if this Dekel gapless and tubular, with the offset cylinder 10 may be provided with holes for the passage of air, providing the injection pressure for this purpose.

Dekel 20 includes a mounting stub layer 22, which may be formed, for example, of fiberglass sleeve provided on an industrial scale company Rotex GmbH & CO. KG, Ahaus-Ottenstein, Germany. Mounting the stub layer 22 is preferably sufficiently strong and rigid to support a tubular shape, allowing for the expansion that is needed on what I am planting deckle on top of the cylinder 10.

Therefore, mounting the stub layer 22 has a convex outer surface 23, when located on the offset cylinder 10. Over the outer surface 23 is compressible layer 24, which may also be wider at the axial Central part than at the axial ends of the deckle 20. Compressible layer 24 may be made for example of rubber prisoners in her bubbles or micro-pores to provide compressibility.

Over the compressible layer 24 can be located inextensible layer 25, for example a layer of threads or fibers. Inextensible layer 25 can help maintain the shape of the compressible layer 24.

Layer 26 for printing forms the outer layer and may be formed, for example, of hard rubber. In a preferred embodiment, according figa, layer 26 for printing is formed so that the outer surface 27 for printing is perfectly cylindrical, when Dekel 20 is offset cylinder 10 and to this Dekel 20 is not applied pressure.

The surface 27 for printing coat through cylinder 5 for forming images, such as the plate cylinder. The cylinder 5 to form the image may be, for example, four zones 5A, 5B, 5C, 5D image in the axial direction, and each image area covers the circumference of the cylinder 5 for forming images in so-called single ring configuration. However, the cylinder 5 to form the image may have two (or more) images, separated from each other in the circumferential direction with the so-called dual (or more) ring configuration.

In a preferred embodiment of the invention, the number of axial images at least twice the number of district images, and can be three, four or more times greater than the number of district images, since the present invention has great advantages in the case of the deckles small diameter and a large width.

On FIGU shows another preferred embodiment of the deckle, in which the compressible layer 34 has a constant thickness, and the layer 36 for printing has a concave outer surface for printing.

On figa shown Dekel 120 on the offset cylinder 110 with the outer surface in the form of a right circular cylinder. Dekel 120 has a mounting stub layer 122 with the outer convex surface 123 and the inner surface 121 in the form of a right circular cylinder, when the Dekel 120 is not applied pressure. Compressible layer 124 in the middle of the deckle 120 is thicker than at the axial ends. Layer 126 for printing is formed so that the outer surface for printing is perfectly cylindrical, when Dekel 120 is offset cylinder 110 and to this Dekel 120 not the app. what about the pressure.

On FIGU shown the preferred embodiment of the invention with a mounting stub layer 122, similar to figa, this compressible layer 134 has a constant thickness, and the layer 136 for printing - concave external surface when the Dekel not applied the pressure.

On figs shown the preferred embodiment of the invention, in which the compressible layer 134 has a constant thickness, and the layer 146 for printing - external surface in the form of a right circular cylinder, when the Dekel not applied the pressure.

On fig.2D shown compressible layer 124 in the axial middle of which thickness is greater, and the layer 156 for printing has a constant thickness, resulting formed convex outer surface for printing, when the Dekel not applied the pressure.

On file shown compressible layer 134, which has a constant thickness and layer 166 for printing, which has a constant thickness, resulting formed convex outer surface for printing, when the Dekel not applied the pressure.

On fig.2F shown compressible layer 134, which has the same thickness, and the layer 176 for printing has a thicker axial ends, forming a convex outer surface for printing, when the Dekel not applied the pressure.

On fig.2G shown compressible layer 144, which has a thicker axial end is, as the layer 186 for printing, while the outer surface for printing is formed in the shape of a straight circular cylinder, when the Dekel not applied the pressure.

On figa shown the preferred embodiment of the invention, similar figa, except that the offset cylinder 110 may have an outer surface in the form of a right circular cylinder. Provided by the spacer 150 is formed, for example, sheets of Mylar (MYLAR), which can be affixed to the cylinder 110 or made in the form of the insertion tube, reusable, which is placed within the mounting sleeve.

On FIGU shown the preferred embodiment of the invention, similar figv, except that the offset cylinder 110 may have an outer surface in the form of a right circular cylinder. To give a convex shape, you can use the gasket 150, similar to that shown in figa.

On figa shows a simplified diagram of the bending blanket cylinders 110 and 210 in the case where each offset cylinder 110, 210 has Dekel, same as option, which appear on figa. As you can see, the inner surface 121 becomes convex and the convex inner surface 121 and the layer 122 may contribute to the compensation of low pressure printing in the axial mid-on paper or in the first substrate 100 for printing.

On FIGU shows a simplified diagram of the offset cylinder 110, 210 with the deckles, similar file.

The present invention has advantages, in particular, when printing on roll materials and offset printing machine is mainly lithographic rotary printing machine.

Offset cylinder, described herein, may contain a combination of strip and body offset cylinder, and Dekel, described herein, may contain a combination of housing and deckle strip.

1. Printed Dekel, containing mounting socket layer (22)having at least one axially convex surface, and a layer (26) for printing, located on top of the mounting stub layer, and the outer surface layer for printing has a concave axial profile when Dekel is located on the offset cylinder in the absence of pressure.

2. Printed Dekel according to claim 1, in which the mounting stub layer in the axial mid thicker than at the axial ends.

3. Printed Dekel of claim 1, wherein the mounting sleeve has a constant thickness.

4. Printed Dekel according to any claims 1 to 3, in which the layer for printing has a constant thickness.

5. Printed Dekel according to claim 1, in which the layer for printing made a solid and tubular.

6. Printed Dekel according to claim 1, in which the mounting socket layer (22) in the designs are solid and hard to maintain the tubular form.

7. Printed Dekel according to claim 1, which is made with the possibility of a uniform axial pressure printing or pressure in the gap width mentioned deckle.

8. Printed Dekel according to claim 1, which further comprises a compressible layer positioned between the mounting stub layer and a layer for printing.

9. Printed Dekel of claim 8, which further comprises inextensible layer above the compressible layer and the under layer for printing.

10. Printed Dekel according to claim 1, which contains at least two axial zone of the image.

11. Printed Dekel of claim 10, which contains at least three axial zone of the image.

12. Printed Dekel according to claim 11, which includes four axial zone of the image.

13. Printed Dekel according to claim 1, which contains one image in the circumferential direction.

14. Printed Dekel according to claim 1, in which the mounting stub layer formed of fiberglass.

15. Offset printing machine containing cylinder for imaging, offset cylinder and printed Dekel, made according to any one of claims 1 to 14, the printing Dekel is located on top of the offset cylinder.

16. Offset printing machine according to 15, which is made in the form of a rotary lithographic printing machine.

17. Offset printing machine according to item 15 or 16, in which a cylinder for forming an image is to be placed contains, at least two axial zone of the image.

18. Offset printing machine according to 15, in which the offset cylinder includes a housing with axially convex outer surface, and a printed Dekel, located over the said axially convex outer surface.

19. Offset printing machine according to 15, containing an axially profiled gasket located between the offset cylinder and Dekel, and which is axially convex outer surface.



 

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