DE959369C - Cleaning device for the ink rollers of printing machines - Google Patents

Description

ISSUED MARCH 7, 1957

R 14387 XII / i5d

Rotaprint Limited, London

The invention relates to a cleaning device for cleaning contaminated with paint Printing press rollers.

The usual cleaning devices contain a trough-like container made of metal with a Scraper that, as soon as the device is in working position, over the rotating inking roller brush away so that the paint is removed and directed into the trough. It is known, ίο such devices under spring pressure elastic to be attached to the inking roller so that it can be adjusted.

For effective cleaning, it is necessary that the cleaning device is cleaned before it is put into operation, since otherwise dirt or paint from the previous cleaning cycle will be transferred back to the new roller to be cleaned; can. In the known devices, the trough is made of metal and ¹ is usually provided with a wiper made of leather or rubber, the cleaning of which is uncomfortable and time-consuming, especially when cleaning takes place some time after use and the paint has dried . In the device according to the invention, this cleaning is not necessary.

The cleaning device according to the invention for ink rollers has a trough-shaped part, which can be adjusted to the roller to be cleaned, so-

like inside the trogartigea container an exchangeable, Trough-shaped Eineatz with at least one side over the upper edge of the Container protruding edge, which acts as a scraper to remove the paint from the roller and to Discharge into the gutter is used and is to be eliminated with the collected paint. In the drawings means Fig. Ι a partial view of a lithographic ίο offset printing machine with an inventive Cleaning device in operating position;

Fig. 2 is a side view of the shown in Fig. Ι Contraption;

Fig. 3 shows the same view as Fig. Ι, but shows the cleaning device in the rest position;

FIG. 4 is a partial plan view of that shown in FIG Cleaning device;

Fig. 5 shows a partial plan view of a blank from which an insert according to the invention is produced is adjustable.

As shown in the corresponding figures, the cleaning device has a trough-shaped part i, one side wall i _{a of which is} slightly higher than the opposite, I ₆ . The trough ι is closed and held by end plates 2, which have angled parts with hooks 3 which engage in the pins 4 attached to the machine frame. A leaf spring 5 is rotatably attached on both sides to an extension 7, which is located at the two opposite ends of the plates 2, by a rivet connection or by screws and nuts at 6.

In the trough ι there is an exchangeable, channel-shaped insert. It consists of the bottom 8 and two opposing side walls 9 and 10, which over the upper edges of the walls i _a and i _{& of} the trough below have protruding edges 11 and 12 to hold the insert in its position. The wall 9 of the insert is deeper than the wall 10. The edge 11 serves as a scraper to wipe the paint off the roller to be cleaned and to guide it into the channel-shaped insert.

As indicated in the drawings, the cleaning device is attached to an offset printing machine having a cylinder A to which a plurality of rollers, as indicated at B, are usually provided with ink. During the printing process, the container with the moistening liquid is in the position assumed here by the trough 1, so that the roller B ^{1 of} the roller arrangement B is immersed in the container and absorbs the moistening liquid.

If the rollers of the machine are to be cleaned, this container is removed and the trough 1 is fastened by inserting the hooks 3 into the pins 4; When inserting the cleaning device, the springs 5 are rotated about their pivot points 6 into the positions shown in FIGS. 3 and 4. If the device is then hooked into the pin 4, the spring 5 is rotated into the position indicated in FIGS Rotate axis 15. Handles are provided for the cams. If the device is attached as described, the end plates 2 are inclined in such a way that the edge 11 of the insert lies against the roller B ^1. The desired pressure contact to be exerted by the edge 11 is produced by turning the cams 13 counterclockwise, whereby the pressure is transmitted to the springs 5.

At the beginning of the cleaning process, a suitable paint dissolving liquid is poured over the cylinder A and roller assembly B. The machine is then put into operation for a short time, the edge 11 of the insert taking the paint off the surface of the roller 2? ¹ strips off. The paint on the cylinder B is transferred to the roller B ¹ via the roller assembly during the operation of the machine, as a result of which all of the paint on the roller assembly B and the cylinder A is removed. As soon as the cleaning process is finished, the device is released from the hook 4 and the paint container is returned to the normal operating position of the machine. The paint wiped off by the rollers flows from the scraper edge 11 into the channel-shaped insert, whereupon the entire insert can be easily removed from the trough 1.

The insert is made of relatively stiff paper or paperboard ¹ or other inexpensive material and is thrown away with the accumulated therein color and replaced by a new one. The opposite ends of the insert extend longitudinally beyond the ends of the roller B ¹ to allow the operator to hold these protruding ends with his hands to lock the insert and thus retain the paint therein when the insert is removed from the trough 1 will.

Fig. 5 shows the partial plan of a blank from which an insert can be made. The sheet-like blank consists of stiff paper, n ₀ cardboard od. The like., And, as shown, vorgierillt in the longitudinal direction several times so that it can be folded · can, that the strips on the floor 8, the strips ac and bd the opposite Side walls 9 and 10 and the lines c, d the inner sides of the edges. 11, 12 result. The paper or cardboard from which the insert is made is preferably as absorbent as possible in order to soak up at least some of the paint that has accumulated thereon. iao

If necessary, the insert can be designed so that a channel or a suitable material trough-shaped structure for insertion into the trough 1 of the cleaning device is formed, with at least one of the side walls has a border 1 * 5 can be seen as cleaning «- or wiping edge

serves. Such an insert can be made from pulp or the like. Be made. A shaped insert should preferably be designed in the shape of a channel, roughly similar to the inserts shown in the examples; but it can also be trough-shaped be, d. H. consist of a longer channel with end walls at the ends.

Claims (3)

PATENT CLAIMS: i. Cleaning device for the ink rollers in printing machines, whose collecting trough with a scraper edge can be placed against the inking rollers to be cleaned, characterized by an insert made of cardboard or the like, which covers the spacing edge and can be inserted into the trough, which is to be eliminated with the trapped paint. 2. Cleaning device according to claim i, diadiurch marked that the insert with ao Edges (ii, 12) protruding over the upper edges on both sides made of a pre-creased cardboard strip, is foldable. 3. Cleaning device according to claim 1, characterized in that the insert consists of a $ paper pulp or a similar absorbent mass. Considered publications:
German patent specification No. 608 745. 1 sheet of drawings © «09 616/12 8.56 (609 833 2.57)