CS215005B2 - Dying appliance of the numbering cylinder on the offset rotary printing machine - Google Patents

Abstract

The printing unit, originally conceived as an offset printing unit, has a numbering cylinder (6) instead of the rubber-covered cylinder; a plate cylinder (7) is not arranged in the printing unit. Two application rollers (20, 21) are provided for inking the numbering cylinder (6); they are connected to the ink duct (9), using roller bearings belonging to the inking and damping units and provided in the original offset printing unit. Serially produced parts of the offset printing unit can be used in the manufacture of the printing unit. <IMAGE>

Description

The invention relates to a numbering roller dyeing apparatus on an offset rotary printing press of a series construction, wherein the numbering roller is arranged in an offset printing apparatus with two applicator rollers.

With multi-color offset rotary printing machines, there is sometimes a need to provide the machine with its own numbering device. If such a need is frequent, it would be desirable to provide a special printing device. However, this would be associated with additional acquisition costs, for example, for new side stands and the like.

Therefore, it was attempted to replace the plate cylinder with a rubber dyeing roller and to place a numbering roller instead of a conventional rubber roller. In this case, the wetting device is rendered inoperative and the dyeing device paints a rubber coloring roller which transfers color to the numbering roller. If the rubber coloring roller and the numbering roller are of the same diameter, the numbers of the numbering roller always lie in the same place of the coloring roller. This, on the one hand, damages the rubber coating of the inking roller, and on the other hand, the quality of the coloring of the numbers suffers. This does not guarantee pure coloring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple and inexpensive arrangement of dyeing rollers for uniformly and accurately coloring a numbering roller which is embedded in an offset rotary printing press in place of a rubber roller.

SUMMARY OF THE INVENTION The problem is solved by providing a numbering roller dyeing apparatus on an offset rotary printing press of series construction, wherein the numbering roller is arranged in an offset printing apparatus with two applicator rollers which differ from the known embodiment according to the invention. the end of the ink roller chain.

In an arrangement that makes the most of the original machine elements, in accordance with the invention, in a series of ink rollers, the original first application roller is used as a transfer inking roller and three transfer inking rollers out of four are mounted in roller bearings of the dampening device.

In an arrangement that is suitable for any design of inking unit, according to the invention, both the original transfer rollers are used as inking transfer rollers, and the second transfer inking roller of the other two is in contact with both numbering roll application rollers.

215085

The numbering roll dyeing apparatus of the offset rotary printing press produced in accordance with the invention has the advantage of employing mass-produced parts, thus saving on acquisition costs and maintaining a uniform appearance of the machine. The solution saves on expensive rubber inking rollers and ensures even coloring of numbers and thus high print quality.

Another advantage of the first configuration is that parts adapted to drive the rollers as well as sidewalls, wheel guards and pressure adjusting devices are used without modification.

In the second variant, the advantage is the independence of the existing dampening device and the adaptability to any dyeing device design ·

Embodiments of the numbering roller dyeing apparatus on an offset rotary printing press made according to the invention are shown in the accompanying drawings, in which Fig. 1 shows a side view of a dyeing apparatus using predetermined dampening roller bearings and Fig. 2 a side view of a dyeing apparatus with the roll arrangement independently of a predetermined damping roll arrangement.

Between the side stands 1 of the offset rotary printing press, which is arranged in a row between the other printing machines, the sheet is fed to the printing roll 4 by means of the first feeding roll 2 and the second transfer roll 3, where it is printed. or out.

The usual rubber cylinder is

Claims (3)

A numbering roller dyeing apparatus on an offset rotary machine of series construction, wherein the numbering roller is arranged in an offset printing apparatus with two spreading rollers, characterized in that the numbering roller (6) is arranged in place of the rubber roller at the end of the ink roller chain. 2. The dyeing device according to claim 1, characterized in that in a row of ink rollers, the original first application roller (15) is used as a transfer inking roller for the numbering roller 6. The original plate roller 7 is removed and remains in place on the outside of the side stand. 1 only the intermediate wheel. The numbers are printed on the sheet immediately by the numbering roller 6. The color is transferred from the inking unit 9 through the inking roller 8 by means of a transfer roller 10 to the spreading rollers 11, 12, 13, between which the coloring rollers 14 are arranged. So far the arrangement of the two alternatives is identical, but differs in the other. In the first embodiment shown in FIG. 1, the spreading roller 13 is in contact with the original first coating roller 15, which in this case is used as a transfer inking roller, to which four transfer inking rollers 16, 17, 18, 19 are connected. the last of which is in contact with two application rollers 20, 21. The three transfer inking rollers 17, 18, 19 are housed in the bearings of the original moistening rollers. One inking transfer roller 16 and both application rollers 20, 21 are mounted in bearings between the side stands 1. The rollers 22 of the original dyeing device as well as the dampening rollers 23 are removed. In the second exemplary embodiment shown in FIG. 2, both the original application rollers 15, 15 &apos; which are in contact with the transfer inking roller 24 and the other transfer inking roll 25, which are preferably located approximately on the axis of the original plate roll 7, are retained. the inking roller 25 contacts the two application rollers 26, 27 of the numbering roller 6. BACKGROUND OF THE INVENTION and three transfer inking rollers (17, 18, 19) of the four transfer inking rollers (16, 17, 18, 19) are mounted in the roller bearings of the original dampening device. 3. The dyeing device according to claim 1, characterized in that in the ink roller chain the two original application rollers (15, 15 ') are used as ink transfer rollers and the second transfer ink transfer roller (25) is in contact with the two application rollers (26, 15, 15'). 27) the numbering roller (6).