FI77816B - ROTATIONSTRYCKMASKIN MED SAMMELTRYCK FOER TRYCKNING AV VAERDEPAPPER. - Google Patents

Description

1 77816

Aggregate frame press rotary press for securities printing support

The invention relates to a printing device for an aggregate frame printing rotary machine according to the type definition of claim 1 for security printing in the form of indirect letterpress printing.

Assembly frame rotary printing machines for indirect embossing are already known. However, in such machines, several frame cylinders carrying embossing plates are arranged around one rubber cylinder. Each plate cylinder has a color device arranged for this purpose. The rubber cylinder gets a multi-colored color coating from the plate cylinders. A multicolor color film is thus formed on the rubber cylinder, which is transferred from the embossing plates.

U.S. Pat. No. 3,390,631 discloses so-called cut, elastic template rollers.

The present invention starts from the object of creating a printing device for indirect aggregate frame printing from embossing frames suitable for multicolor printing of one or more lines as a security area for securities, whereby the printed lines can be printed changing color continuously and without transition.

The problem to be solved by the invention is in which each pressure plate must print several similar patterns next to each other and one after the other, each of which shows one or more thin lines. These lines are more colored. In other words, they have several colors as a continuation of each other. When using several printing plates for printing a multicolored line, as disclosed in the previous publications DE-ΘΘΘ 247, CH-502 897 and US-4,056,056, it is by no means a problem to print the beginning of the sheet so that the colors are exactly in place, but as the sheet approaches the end end becomes increasingly difficult to keep the colors exactly in place and results in dashed lines. Such sheets are not acceptable.

This object is solved as defined in the characterizing part of claim 1.

The advantages achieved by the invention are based in particular on the fact that the lines and surfaces can be printed with an indirect letterpress-assembly weight with uninterrupted color changes and without displacements. No color size cylinder is needed to first assemble the colors and then deliver them to the platen. On the other hand no need for multiple plate cylinders, in order to press the start-line. This avoids laborious adjustment of the private pressure plates and their precise installation as a continuation of each other. Embossing plates can be used to achieve a print image equivalent to dry offset printing quality. The width of the lines of the printing frame remains approximately the same as they are transferred to the printing substrate. The outlines of the lines and color surfaces are sharply demarcated and have a uniform color coverage. In direct letterpress printing, avoid inevitable messy edges and uneven color coverage of lines or surfaces on a hard-to-print substrate. A further advantage is that for the rubber cylinder acting as a back pressure cylinder, a plate cylinder can be provided which carries, for example, several printing plates which are dyed from stencil rolls, so that a double-sided printing can be produced at the same time.

In the accompanying drawing, one embodiment of the invention is described, which will be explained in more detail below. The drawing shows a schematic side view of a sheet-assembly frame rotary printing machine with a printing device according to the invention.

The printable sheets 2 arrive from the cascade feeder 1 in a known manner on conveyor belts (not shown) via the stop drum 3 and the transfer drum 4 and end up in non-shown but known rubber cylinder Θ grippers (only when the sheets are in the printing area). The plate cylinder 23 cooperates with a rubber cylinder 8, the circumference of which may be coated with one but also with rubber fabrics 19, 21, 22 about the length of the printing plate. The circumference of the plate cylinder 23 has one or more embossing plates 24, 26, 27. The embossing plates 24, 26, 27 are dyed elastic. with eectorally cut template rollers 28, 20, 30, 31 known per se. Coloring devices 33, 34, 36, 37 are used for coloring the template rollers 28, 29, 30, 31, each of which is provided for each eablon roller 28, 29, 30, 31. color device 33, 34, 36, 37. The circumferences of the rubber cylinder 8 and the plate cylinder 23 are the same and an integer multiple of the circumference of the template rollers 28, 29, 30, 31. All template rollers 28, 29, 30, 31 have the same circumference.

All cylinders 8, 13, 23, 14, 16, 17, 18, rollers 28, 29, 30, 31, coloring devices 33, 34, 36, 37 and drums 3, 4 are driven via a common gear drive known per se from the main motor 32.

The printable printing medium, e.g. sheet 2, can be pressed half-compressed between the rubber cylinder 8 and the rubber cylinder 13. In this case, the rubber cylinder 13 coated with one or more rubber fabrics 9, 11, 12 may be discolored by the offset pressure plates 38, 39, 41, 42 of the offset plate cylinders 14, 16, 17, 18. The offset pressure plates 38, 39, 41, 42 is dyed with a color device 43, 44, 46, 47 provided for each of them. The rubber cylinders 8 and 13 have the same circumference, as do the offset plate cylinders 14, 16, 17, 18. The circumference of the rubber cylinders 8, 13 is an integer multiple of the circumference of the offset plate cylinders 14, 16, 17, 18.

It would also be possible to mirror-form the cylinders 8 and 23 by means of the template rollers 28, 29, 30/31 and the color devices 33, 4 77816 34, 36, 37 to arrange the cylinders β and 23 once again (but without grippers) of the template rollers 28, 29, 30, 31 and in connection with the color devices 33, 34, 36, 37. With this arrangement of cylinders, a printing substrate, for example a sheet 2, between the rubber cylinders 8, 8 would be printed simultaneously on both sides.

The novelty liquids DE-PS 888 247 and CH-PS 502 897 disclose the printing of multicolored patterns on letterpress plates using rubber cylinders. It requires one letterpress plate for each color to be printed. Each color must match every other color, which is why each letterpress plate must be precisely aligned with each other plate. In the printing apparatus according to the invention, only a single of fset printing plate is required to achieve a multicolor printing image in the wet-offset method. This of fset printing plate 24, 26, 27 has a multicolored pattern and is colored by means of template rollers 28-31. Dyeing an intaglio plate with stencil rollers is known, for example, from U.S. Pat. No. 3,390,631. way. In this way, for example, in connection with a multicolored line weight, no undesired openings or lateral transitions can be formed between the individual, differently colored line parts.

In the printing apparatus according to the invention, only a single of fset printing plate is required to achieve a multicolor printing image in the wet-offset method. This of fset printing plate 24, 26, 27 has a multicolored pattern and is colored by means of template rollers 28-31. Since the entire multicolor pattern occurs on a single of the fset printing plate, it is necessary to align the template rolls 28-31 only so that the coloring portions color the feet of the printing plate 24, 26, 27 in a manner similar to that. Thus, for example, in the case of a multicolored line weight, undesired s 77816 gaps or non-curved gaps cannot be formed between individual, differently colored line prints,

Namely, the eector-dyed offset printing plates 24, 26, 27 are transferred to the printing fabrics 22, 21 and 19 of the rubber cylinder 13 by means of the template valances 28-31. It should be noted that the same offset printing material interacts with the same printing fabric, i.e. the offset printing plate 24 with the printing fabric 19, of the fset printing plate 26 with the printing fabric 21 and of the fset printing plate 27 with the printing fabric 22. The printable sheet 2 is placed in the printing point formed by the rubber cylinder 8 and the rubber cylinder 13. Here, the rubber sy 1 interi 8 and / or 13 hands over its multicolored image on sheet 2. The different stages of the cylinders and rollers on the right side of the printing machine are the same as on the left side of the printing machine.

Claims (5)

6 77816 Pä fr.gnfr fr iyaafr-imaJs a? t A printing apparatus for an assembly frame rotary printing machine for a security printing support with indirect letterpress printing, the apparatus having a plate cylinder <23> coated with embossing frames <24, 26, 27), a plurality of used, sector-wide, 29, 28 , which color embossing frames, in which case a coloring device <33, 34, 36, 37) is provided for each stencil roll, characterized in that a rubber cylinder (8) is provided for the sector-colored plate cylinder (23), which transfers to its rubber cloth or rubber cloth <19, 21, 22) transferred multicolor prints to the printing substrate (2). Printing device according to Claim 1, characterized in that it is provided with a back pressure cylinder (13) which cooperates with the rubber cylinder. Printing device according to Claims 1 and 2, characterized in that the back pressure cylinder (13) is designed as a rubber cylinder, that rubber cylinder <13) is provided with a rubber fabric or several rubber fabrics <9, 11, 12) extending over its entire circumference, each of which extends over a portion of the cylinder liner. Printing device according to Claims 1 to 3, characterized in that a plurality of offset plate cylinders <14, 16, 17, 18) carrying fset printing plates <38, 39, 41, 42) are arranged for the rubber cylinder (13). with color devices <43, 44, 46, 47). Printing device according to Claim 1, characterized in that a second rubber cylinder <8) is provided for the rubber cylinder (8), a sectorally dyed second plate cylinder <23 coated with embossing plates <24, 26, 27) and provided with a second rubber cylinder <8). ), in which case the embossing plates <24, 26, 27) are dyed by sector 7727 6 ries & flake-cut, elaetiet eablon valances (28, 29, 30, 31) and a dye device (33) is provided for each stencil valence (26, 29, 30, 31). , 34, 36, 37).