DE8107484U1 - "COLLECTIVE PRINTING MACHINE PRINTER FOR SECURITIES PRINTING" - Google Patents

Description

Collective printing rotary machine printing unit for security printing

Sammeiaruck-Rotationsjnaschindruckwerk for security printing in indirect letterpress, with a rubber cylinder and a forme cylinder covered with printing forms, whereby a plurality of so-called cut-out cylinders per form cylinder
Stencil rollers are arranged, and each stencil roller is assigned an inking unit. The collective printing rotary machine printing unit for security printing can be used in both sheet-fed and web-fed rotary printing machines,

The invention relates to a collective printing rotary machine printing unit for security printing in indirect letterpress according to the preamble of claim 1.

Collective rotary printing machines for indirect letterpress printing have become known. In such machines, however, there are several letterpress printing plates around a blanket cylinder
supporting forme cylinder arranged. Each plate cylinder has an inking unit assigned to it. The blanket cylinder receives a multicolored application of paint from the plate cylinders. A multi-colored ink film is created on the blanket cylinder, which is applied by the letterpress plates.

From US-PS 3,390,631 are so-called cut,
elastic stencil rollers become known.

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Koenig & Bauer - 2 - 1981-03-03 Public company P1.561DB Wuerzburg / Germany

The invention is based on the object of providing a printing unit for indirect collective printing vSri "letterpress forms create that is suitable for printing one or more lines in multiple colors as a security background for securities, with the lines to be printed uninterrupted in the

Color changes and can be printed without displacement.

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The task is characterized by the subject matter of the Part of claim 1 solved.

The advantages that can be achieved with the invention are in particular that lines or areas in uninterrupted Color changes can be printed in indirect letterpress collective printing without any offset. There is no need to arrange the color saramel cylinder, which is the colors first collects and then releases it onto the printing plate. On the other hand, several plate cylinders are not needed to make one To be able to print line background. This results in a labor-intensive adjustment and register-keeping fit the individual printing plates avoided to each other. High-pressure plates ^ can be used with which one in the Quality print image to be equated with dry offset printing can be reached. The line width of the line on the printing form remains when it is transferred to the printing medium approximately received. The outer contours of the lines and colored areas are sharply delimited and are uniform Color coverage on. In the case of direct letterpress printing, they are transferred from a hard form to a print carrier

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Koenig & Bauer - 3 - 1981-03-03 Public company P1.561DE Wuerzburg / Germany

unavoidable crushing edges and uneven color coverage of the lines or areas avoided. It is also advantageous that a plate cylinder is assigned to the blanket cylinder acting as an impression cylinder can be, the z. B. carries several printing plates that are colored by stencil rollers, so that at the same time Perfecting can be produced.

An embodiment of the invention is shown in the drawing and is described in more detail below. the Figure shows

a sheet-fed collective printing rotary printing press with a printing unit according to the invention in cooperation with an offset printing unit, in a schematic representation in side view.

From a stream feeder 1, sheets 2 to be printed arrive in a known manner by means of conveyor belts (not shown) via a stop drum 3, an overhead drum 4 in not shown, but known gripper of a rubber cylinder 8 (only for sheets as print media).

With the blanket cylinder 8, but also with a single one can be covered with rubber blankets 19, 21, 22 about the length of a printing plate on its circumference, a plate cylinder acts together. The plate cylinder 23 carries one or more high-pressure plates 24, 26, 27 around its circumference. The high-pressure plates 24, 26, 27 are designed by means of elastic, sectoral

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Koenig & Bauer - 4 - 1981-03-03 Public company P1.561DE Wuerzburg / Germany

cut, known stencil rollers 28, 29, 30, 31 colored. Inking units 33, 34, 36, 37 are provided for inking the stencil rollers 28, 29, 3O _{r 31, each stencil roller 28;} 29; 30; 31 an inking unit 33; 34; 36; 37 is assigned. The circumference of the blanket cylinder 8 and plate cylinder 23 are the same and are an integral multiple of the circumference of the stencil rollers 28, 29, 30, 31. The stencil rollers 28, 29, 30, 31 all have the same circumference.

All cylinders 8, 13, 23, 14, 16, 17, 18, rollers 28, 29, 30, 31, inking units 33, 34, 36, 37 and drums 3, 4 are driven by a main motor 32 via a common gear wheel train known per se.

The print medium to be printed, e.g. B. sheet 2, can under pressure between the rubber cylinder 8 and a Gummiyzlinder 13 z. B. printed simultaneously in face and reverse printing will. In this case, the blanket cylinder 13, which is covered with one or more blankets 9, 11, 12, of Offset printing plates 38, 39, 41, 42 of the offset plate cylinder 14, 16, 17, 18 can be colored. The offset printing plates 38, 39, 41, 42 are assigned by one of them Inking unit 43, 44, 46, 47 colored. Blanket cylinders 8 and 13 have the same scope, also the offset plate cylinders 14, 16, 17, 18 below each other. The circumference of the blanket cylinder 8, 13 is an integral multiple of the scope of the Offset plate cylinders 14, 16, 17, 18.

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Koenig & Bauer - 5 - 1981-03-03 Public company P1.561DE Wuerzburg / Germany

Bs would also be a mirror image of the cylinders 8 and 23 with the stencil rollers 28, 29, 30, 31 and the inking units 33, 34, 36, 37 still initially the cylinders 8 and 23 (however without gripper) with the template rollers 28, 29, 30, 31 and the inking units 33, 34, 36, 37 to be arranged. With this arrangement of the cylinders, the printing medium, e.g. B. a sheet 2, between the blanket cylinders 8, 8 at the same time in the beautiful and Can be printed on reverse printing.

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Koenig & Bauer Aktiengesellschaft Wuerzburg / Germany

1981-03-03 PI, 561DE

Parts list

1 Shed feeder 28 Stencil roller 2 arc 29 Stencil roller 3 Stop drum 30th Stencil roller 4th Transfer drum 31 Stencil roller 5 -.,. . .. '- 32 main engine 6th -. '' ■ "- 33 Inking unit 7th ΣΓ. * " 34 Inking unit 8th Rubber cylinder 35 9 Rubber blanket (13) 36 Inking unit 10 - 37 Inking unit 11th Rubber blanket (13) 38 Offset printing plate 12th Rubber blanket (13) 39 Offset printing plate 13th Rubber cylinder 40 14th Offset plate cylinder 41 Offset printing plate 15th 42 Offset printing plate 16 Offset plate cylinder 43 Inking unit 17th Offset plate cylinder 44 Inking unit 18th Offset plate cylinder 45 19th Rubber blanket 46 Inking unit 20th 47 Inking unit 21 Rubber blanket 22nd Rubber blanket 23 Forme cylinder / Claims 24 High pressure plate 25th 26th High pressure plate 27 High pressure plate

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Claims (5)

Koenig & Bauer - 7 - 1983-07-07 Aktiengesellschaft P1,561Dfi Wuerzburg / Germany Protection claims 1. Collective printing rotary machine printing unit for security printing in indirect letterpress with a plate cylinder covered with letterpress forms, with several around the Plate cylinders arranged, driven, sectorally cut out, inking the letterpress forms Stencil rollers, an inking unit being arranged on each stencil roller, characterized in that with a blanket cylinder (8) is in contact with the sectorally colored plate cylinder (23). 2. Sainmeldruck rotary press printing unit according to claim 1, characterized in that an impression cylinder (13) cooperating with the blanket cylinder (8) is arranged. 3. collective printing rotary machine printing unit according to claim 1 and 2, characterized in that the impression cylinder (13) is designed as a blanket cylinder (13) that the blanket cylinder (13) with an approximately over the entire Circumference of the rubber cylinder (13) extending rubber blanket, or several each over part of the circumference extending rubber blankets (9; 11; 12) is provided. 4. Sarameldruck Rotationsmascnindruckwerk according to claim 1 to 3, characterized in that the rubber cylinder (13) carries a number of offset printing plates (38, 39, 41, 42) Offset plate cylinders (14, 16, 17, 18) are in contact with the associated inking units (43, 44, 46, 47). Koenig & Bauer - 8 - 1983-07-07 Public company P1.561DR Wuerzburg / Germany 5. collective printing rotary machine printing unit according to claim 1, characterized in that the Gurami cylinder (8) is assigned a second rubber cylinder (8) that with the second blanket cylinder (8) with high-pressure plates (24, 26, 27) covered, sectorally colored second JPiatte cylinder (23) is in contact so that each stencil roller (28, 29, 30, 31) has an inking unit (33, 34, 36, 37) having.