DE3109977A1 - "COLLECTIVE PRINTING MACHINE PRINTER FOR SECURITIES PRINTING" - Google Patents

Description

Koenig & Bauer - «♦ - 1982-O2-O5

Public limited company P1.564DE

Wuerzburg / Germany 326 / Ru / er

Collective printing rotary machine printing unit for security printing

The invention relates to a collective printing rotary press printing unit for securities printing in offset printing according to Preamble of claim 1.

Collective rotary printing machines for indirect letterpress printing have become known. With machines like this however, several forme cylinders carrying high pressure plates are arranged around a blanket cylinder. Every form cylinder has an inking unit assigned to it. The blanket cylinder receives a multicolored application of paint from the plate cylinders. It a multicolored 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-out, elastic stencil rollers become known.

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Koenig & Bauer - * - 1981-03-13

Public limited company P1.564DE

Wuerzburg / Germany

The invention is based on the object of creating a printing unit for collective printing in offset printing, which is suitable for printing one or more lines in multiple colors as a security background for securities, whereby the lines to be printed can be printed continuously in color change and without offset.

The object is achieved by the subject matter of the characterizing part of claim 1.

The advantages that can be achieved with the invention are in particular that lines or areas in uninterrupted Color changes can be printed in offset collective printing without any offset. There is no need for an ink collecting cylinder to be arranged, which first collects the colors and then releases them onto the printing plate. On the other hand, neither will several forme cylinders are required to be able to print a line background. This makes a laborious one Adjustment and registration of the individual printing plates to one another avoided. It can be offset plates can be used with which an excellent print image can be achieved. The line width of the line remains on the printing form when it is transferred to the printing medium. The outer contours of the lines and colored areas are sharply delimited and show an even color coverage. There are those with direct high pressure from a hard one Form on a print carrier to be printed, unavoidable crushed edges and uneven ink coverage of the

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I · · · ■ ■

Koenig & Bauer - 15 "- 1981-03-13

Aktiengesellschaft Pi.564DE

Wuerzburg / Germany

Lines or areas avoided.

Another advantage is that it is used as an impression cylinder acting blanket cylinder can be assigned a forme cylinder z. B. carries several printing plates by Stencil rollers are colored so that front and back printing can be produced at the same time.

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 machine in cooperation with a printing unit according to the invention with another 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, transferring drum 4 in not shown, but known gripper of a rubber cylinder 8 (only for sheets as print media).

A forme cylinder 23 cooperates with the blanket cylinder 8, which can be covered on its circumference with a single blanket 19, 21, 22 which is approximately the length of a printing plate. The plate cylinder 23 carries about its periphery one or more offset printing plates 24, 26, 27, the offset plates 24, 26, 27 by means of elastic, sectoral cut-out, known per se Schablorienwalzen 28

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Koenig S, Bauer - * - 1981-03-13

Corporation. Pt.564DE

Wuerzburg / Germany

29, 30/31 colored. For inking the stencil rollers 28, 29, 3O _f 31 are offset printing units 33, 34, 36, 37 are provided, each of stencil roller 28, 29, 30, 31, an offset inking unit 33, 34, 36, 37, each with a dampening unit 5, 6 , 7, 10 is assigned. The circumference of the blanket cylinder 8 and forme cylinder 23 are the same and 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 via a common gear train that is known per se driven by a main motor 32. The dampening units 5, 6, 7, 10 are in a known manner by a separate electric motor driven.

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

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Koenig & Bauer - * - 1981-03-13

Joint stock company PI.564DE

Wuerzburg / Germany

It would also be possible to mirror the cylinders 8 and 23 with the stencil rollers 28, 29, 30, 31 and the inking units 33, 34, 36, 37 again the cylinders 8 and 23 (but without the gripper) with the stencil 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 Gumraizylindem 8, 8 simultaneously in the beautiful and Can be printed on reverse printing.

The printed sheets 2 are z. B. fed via chain boom to a sheet delivery device. Using a paper web as a print carrier is the printed paper web ζ in a known manner. Β. fed to a cross cutter, there cut into sheets and stored in a sheet delivery device.

/ Parts list

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Koenig & Bauer Aktiengesellschaft Wuerzburg / Germany

1981-03-13 PI.564DE

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 Dampening system 32 main engine 6th Dampening system 33 Inking unit 7th Dampening system 34 Inking unit 8th Rubber cylinder 35 9 Rubber blanket (13) 36 Inking unit 10 Dampening system 37 Inking unit 11 Rubber blanket (13) 38 Offset printing plate 12th Rubber blanket (13) 39 Offset printing plate 13th Rubber cylinder 40 14th Offset form cylinder 41 Offset printing plate 15th 42 Offset printing plate 16 Offset form cylinder 43 Inking unit 17th Offset form cylinder 44 Inking unit 18th Offset form cylinder 45 19th Rubber blanket 46 Inking unit 20th 47 Inking unit 21st Rubber blanket 22nd Rubber blanket 23 Forme cylinder / Claims 24 Offset printing plate 25th 26th Offset printing plate 27 Offset printing plate

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Claims (5)

• · ·· ·· ■■ ·· ι •••••• a · ··· · a Koeniq & Bauer - * - 1981-03-13 Aktiengesellschaft PI.564DE Wuerzburg / Germany Patent claims 1.) Collective printing rotary machine printing unit for securities ^ - ^ printing in offset printing, characterized in that a forme cylinder (23) occupied by offset printing plates (38, 39, 41, 42) is provided that several arranged around the forme cylinder (23), driven, sector-cut, the offset printing plates (38, 39, 41, 42) inking stencil rollers (28, 29, 30, 31) are arranged, each stencil roller (28, 29, 30, 31) is assigned an inking unit that the sectoral The inked forme cylinder (23) is assigned a rubber cylinder (8) which transfers the multicolored print images collected on its rubber blanket or blankets (19, 21, 22) to a printing medium (2). 2. collective printing rotary machine printing unit according to claim 1, characterized in that one with the rubber cylinder (8) cooperating impression cylinder (13) is provided. 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 a part of the circumference extending rubber blankets (19; 21; 22) is provided. /8th Kooniq & Bauer - «r - 1981-03-13 Corporation. P1.564DE Wuerzburg / Germany 4. collective printing rotary machine printing unit according to claim 1 to 3, characterized in that the rubber cylinder (13) a number of uffset printing plates (38, 39, 41, 42) bearing offset forme cylinders (14, 16, 17, 18) with associated inking units (43, 44, 46, 47) are assigned. 5. collective printing rotary machine printing unit according to claim 1, characterized in that the rubber cylinder (8) is a second blanket cylinder (8) is assigned that one with the second blanket cylinder (8) cooperating with offset printing plates (24, 26, 27) occupied, sectorally colored second forme cylinder (23) is provided, the Offset printing plates (24, 26, 27) from sectorally cut out, elastic stencil rollers (28, 29, 30, 31) are oiled, and each stencil roller (28, 29, 30, 31) an inking unit (33, 34, 36, 37) and a dampening unit (5, 6, 7, 10) are assigned.