DE3113407A1 - "COLLECTIVE PRINTING MACHINE PRINTER FOR SECURITIES PRINTING" - Google Patents

Description

SUBSEQUENTLY REACHED

Koenig & Bauer -% - 1982-02-05

Public limited company P1.566DE

Würzburg / Germany 325 / Ru / er

Collective printing rotary machine printing unit for security printing

The invention relates to a collective printing rotary press printing unit for security printing according to the 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. The blanket cylinder receives a multicolored imprint from the plate cylinders. So a multi-colored ink film is created on the blanket cylinder, which is applied by the letterpress plates.

From US Pat. No. 3,390,631, so-called cutouts are known elastic stencil rollers become known.

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k · · I

Koenig & Bauer - \ - 1981-03-27

Public limited company P1.566DE

Wuerzburg / Germany

The invention is based on the object of a rotary press printing unit for creating a collective print that is suitable for one or more lines in multiple colors than To print security background for securities, with the lines to be printed uninterrupted in color change and without Offset can be printed, the stencil rollers should not have a soft surface, and the Color film is to be split several times on the printing form.

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

The advantages that can be achieved with the invention are insbe- ^ special in the fact that lines or areas in uninterrupted color change without any offset in direct or indirect Letterpress or offset collective printing can be printed. There is no need to arrange an ink collecting cylinder, who first collects the colors and then the hardest. printing form or offset form (offset plate). on the other hand Several forme cylinders with letterpress or offset printing forms are also not required to create a multi-colored line background to be able to print. This is a labor-intensive adjustment and. register fitting of the individual letterpress or offset printing forms to each other avoided. It is also possible to use letterpress plates with which a print image that can be compared to dry offset in terms of quality can be achieved. The line width remains on the printing form when it is transferred to the printing medium

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Koenig & Bauer - \ - 1981-03-27

Joint stock company PI.566DE

Wuerzburg / Germany

approximately received. The outer contours of the lines and printing areas are sharply delimited and show an even pattern Parc cover on. The uneven color coverage that is otherwise unavoidable when printing a hard form avoided. Another advantage is that hard for the sectoral coloring in register with the stencil rollers Color contour plates made of e.g. plastic or metal can be used, which have a long service life. The production In contrast to soft color contour plates, register color contour plates are very easy. The production of soft rubber color contour plates, as previously had to be used for collective printing, is very expensive and nevertheless imprecise with regard to the register accuracy. It is also through the use of hard color contour plates possible to color free-standing smallest colored areas in a different colored field, as in contrast to the rubber colored contour plates Smallest free-standing colored areas can be created, which are not like when using rubber colored contour plates shift when they meet the hard printing form.

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

a Samiaeldruck rotary printing machine with a printing unit according to the invention, in a schematic representation in side view.

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Koenig & Bauer - * - 1981-03-27

Public limited company P1.566DE

Wuerzburg / Germany

The printing unit according to the invention is based on a sheet-fed rotary printing press explained. Of course, the printing unit according to the invention can also be used in a web-fed rotary printing press can be used.

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 to an impression cylinder 6. Stop drum 3 and impression cylinder 6 are in one Sheet-fed rotary printing machine provided in a known manner with controlled sheet grippers. The impression cylinder 6 carries around its circumference a rubber blanket 7 is therefore soft.

A forme cylinder 9 interacts with the impression cylinder 6 under pressure. The printing medium to be printed, for example a sheet 2 _{f, is} printed between the impression cylinder 6 and the forme cylinder 9. The forme cylinder 9 carries one or more hard letterpress forms or offset printing forms 10 around its circumference, which are designed according to the pattern to be printed. The letterpress form or forms or offset printing form / forms 10 of the forme cylinder 9 is / are sectorally colored multicolored by sectorally colored rubber blankets 15; 20; 25; 30 small rubber cylinder 5; 11; 12; 13. Each blanket 15; 20; 25; 30 receives its sectoral paint application from one of it, ie the respective rubber cylinder 5; 11; 12; 13 associated stencil roller 14; 16; 17; 18; each stencil roller 14; 16; 17; 18 with a color contour plate 19; 21; 22; 23 is occupied. The color contour plates 19;

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Koenig & Bauer - S - 1981-03-27

Public company P1.566DB

Wuerzburg / Germany

21; 22; 23 are made of a hard material, e.g. NyIoprint or metal, and, like the well-known soft color contour plates, are worked out in sectors, so that only the in each case remaining sectors from an inking unit 24; 26; 27; 28 are colored and this color application on the Rubber blankets 15; 20; 25; 30 of the blanket cylinder 5; 11; 12; 13th hand over. Each stencil roller 14; 16; 17; 18 is a own inking unit 24; 26; 27; 28 assigned.

The stencil rollers 14; 16; 17; 18 have the same diameter or circumference as those downstream Blanket cylinder 5; 11; 12; 13. The forme cylinder 9 and the impression cylinder 6 have a multiple diameter one of the rollers and cylinders just mentioned. In the exemplary embodiment, they have three times the diameter a stencil roller 14; 16; 17; 18th

According to the invention obtained by the arrangement of the blanket cylinder 5; 11; 12; 13 with their rubber blankets 15; 20; 25; 30 the color application of the letterpress or offset printing forme 10 des Form cylinder 9 multiple color splitting, since the printing form 10 on the form cylinder 9 of all blanket cylinders 5; 11; 12; 13 is rolled over one after the other.

All cylinders and rollers and inking units are synchronized in a known manner via a common gear train driven by a main motor.

Koenig Se Bauer - S - 1981-03-27

Public limited company P1.566DE

Wuerzburg / Germany

Of course, the printing unit according to the invention can also be used for offset printing or indirect letterpress printing will. In this case, a blanket covered with a rubber blanket is between the forme cylinder 9 and the impression cylinder 6 additional "large" rubber cylinder arranged. It preferably has the same diameter as the forme cylinder 9. The printing on the sheet-like or web-shaped printing medium 2 is then carried out between the blanket cylinder and the impression cylinder 6 in a known manner.

Of course, can also take place within the scope of the invention the dry offset process the wet offset process can be used in the known manner or each inking unit a known dampening system is assigned to the forme cylinder.

The printed sheets are fed to a delivery by means of known gripper systems and placed there on a stack. When using the printing unit according to the invention in a web-fed rotary printing press, the printed paper web is e.g. fed to a cross cutter, which cuts the web into sheets and then feeds it to a pile delivery.

/ Parts list

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Koenig & Bauer Aktiengesellschaft Würzburg / Germany 1981-03-27 P1.566DE

Parts list

1 Shed feeder 2 arc 3 Stop drum 1
5 Rubber cylinder 6th Impression cylinder * 7 Rubber blanket 8th 9 Forme cylinder 10 Printing form 11 Rubber cylinder 12th Rubber cylinder 13th Rubber cylinder 14th Stencil roller 15th Rubber blanket 16 Stencil roller 17th Stencil roller 18th Stencil roller 19th Color contour plate 20th Rubber blanket 21st Color contour plate 22nd Color contour plate 23 Color contour plate 24 Inking unit 25th Rubber blanket

26 inking unit

27 inking unit

28 inking unit 29

30 blanket

/ Claims

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Claims (6)

Koenig & Bauer - JS - 1981-03-27 Public limited company PU 566DE Wuerzburg / Germany Claims Collective printing rotary machine printing unit for security printing with a forme cylinder covered with printing forms, an impression cylinder and several stencil rollers cut out in sectors, each stencil roller an inking unit is assigned, characterized in that between the with a color contour plate (19-21; 22; 23) coated stencil roller (14; 16; 17; 18) and the forme cylinder (9) each with a rubber blanket (15; 20; 25; 30) occupied, driven rubber cylinder (5; 11; 12; 13) is provided, the color contour plate (19; 21; 22; 23) releases its sectoral application of color to the rubber blanket (15; 20; 25; 30), and the rubber blanket (15; 20; 25; 30) inks the printing formes (10) on the forme cylinder (9) with the ink application obtained. 2. collective printing rotary machine printing unit according to claim 1, characterized in that a rubber cylinder is provided between the forme cylinder (9) and the impression cylinder (6). 3. collective printing rotary machine printing unit according to claim 1 to 2, characterized in that the forme cylinder (9) is arranged so that it can be covered with hard letterpress forms (10). 4. collective printing rotary machine printing unit according to claim 1 to 2, characterized in that the forme cylinder (9) is arranged so that it can be covered with offset printing plates (10). Koenig & Bauer - * - 1981-03-27 Joint stock company PI.566DE Wuerzburg / Germany 5. collective printing rotary machine printing unit according to claims 1 _f 2 and 4, characterized in that a dampening unit is provided for die.Farbwerke (24; 26; 27; 28). 6. collective printing rotary machine printing unit according to claims 1, 2, 4 and 5, characterized in that forme cylinder (9), impression cylinder (6) and large blanket cylinder den have the same diameter.