DE1761111A1 - Washing device for cleaning a printing machine cylinder - Google Patents

Description

AB Akeaiund & Ra us ing Fack Lund! / Sweden

Washing device for cleaning a printing machine cylinder

Priority: based on Swedish patent application 5518/67

dated April 20, 1967

The present invention relates to a washing device for Cleaning of a cylinder in a printing press, preferably the blanket cylinder of an off-get printing machine

The washing device according to the invention is characterized by a washing roller that is in contact with that to be washed Cylinder can be brought, devices for supplying washing liquid to the washing roller, one below the washing « roller arranged collecting container for the washing liquid and by devices at the point of contact between the washing roller and the cylinder to be washed to limit the washing liquid levy

Up to now, it was necessary in known off-the-shelf printing machines to use Cloth and suitable washing liquid manually the blanket cylinders

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to be cleaned at regular intervals This process is very time-consuming Therefore, attempts have been made to to run this cleaning process mechanically · In however, practice has found that this invention does not successfully carry out these attempts could·

The present invention has been made as follows to be applied with an offset printing press, however As can be seen from the following, it is of course possible to use the new construction for cleaning others To use cylinders in a printing machine

The invention is described in detail below with reference on the drawings, which schematically represent a preferred embodiment of the invention, described

In the drawing, the reference line 1 indicates a rubber cylinder in an offset printing machine 2 and 3 respectively designate the application cylinder and the Impression cylinder of the machine

The washing device according to the invention, which is provided for cleaning the cylinder 1 provided with a rubber blanket, consists of a vaching roller k, a collecting container for contaminated cleaning fluid, devices consisting of an outflow 6 for supplying the washing fluid to the washing roller and a pressure roller 7. Dl · Vasoh roller

is with felt «the e ^ Qe ^ ä ^ bm ^ i ^ hej ^ generous mn * moist ig-

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provided with a weight-absorbing coating.

The opening 6 is provided to wash liquid obliquely downwards at a small angle with respect to the tangent to spray on the washing roller. As a result, the liquid that is not directly absorbed by the felt cover can be drained into the collection tank 5. The recorded However, liquid is carried up to the pressure roller 7, where a large part of it is pushed out of the felt will. To prevent dirty cleaning fluid mixes with the newly supplied cleaning fluid, a baffle 8 is provided. This baffle directs the contaminated liquid over the opening 6 directly nachuiten in the collection tank 5 · all of the above Plant is received in a bearing block 9, which with the help of a hydraulic cylinder 10 in contact with the provided with a rubber blanket cylinder 1 can be brought. In the same way, the pressure roller 7 is on a ScIi wing arm 11 mounted so that they can be with the help of a hydraulic Cylinder 12 can be brought into and out of contact with the washing roller

The washing roller is arranged so that it cannot come into contact with the dirty cleaning liquid in the collecting tank 5. For this purpose, the collecting tank 13 is provided with a relatively large-area outlet channel 13 which guides the contaminated liquid to a larger SänneItank 14. In this tank, “larger impurities are deposited than sediments. The liquid is sucked off from this tank Ik with the aid of a pump 15.

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forced to go through a large filter 16. After leaving the pump, the cleaning fluid is passed through a finer filter 17, which removes small impurities, pushed through. From the filter 17 is the clean liquid directed back to opening 6.

If the cylinder is to be cleaned with a rubber blanket, the application cylinder 2 and the impression cylinder 3 are moved away from the cylinder 1. The washing roller k is brought into contact with the cylinder 1 provided with a rubber blanket with the aid of the hydraulic cylinder 10. The cylinder 1 is rotated and at the same time washing liquid is applied to the washing roller k through the opening 6. The cylinder provided with a rubber blanket can rotate at its normal speed during this working sequence, but this speed can preferably be reduced considerably Bring the impression cylinder into the working position and immediately introduce sheets to be printed into the machine, in which case the first sheet already has a satisfactory print quality. The fact is that almost no washing liquid remains on provided with a blanket cylinder, as all excess liquid from the washing roller - "is removed before the point of contact between the roller and provided with a • ° blanket cylinder. If a sol-Z \ rather remain surplus, the result would be that the liquid ο it quickly moves into the clamping device for the rubber blanket

on accumulates, and it would be necessary, but difficult, to manage these flUs must be removed before a sufficiently good print can be obtained katftn »- 5» ♦

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It is obvious that the invention is not limited to the embodiment described, but within the Range of claims can be changed · Therefore, different construction details can be changed in many ways · Instead of an elongated outlet opening 6, it is possible, for example, to use a large number of outlet openings which are arranged parallel to one another.

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Claims (8)

Ί761111 PATENT CLAIMS 1 device for small bottles in a cylinder la of a printing machine, preferably the rubber cylinder in an offset printing machine, characterized by a washing roller (4) which can be brought into contact with a cylinder, an opening (6) which supplies the washing roller (A) with the cleaning fluid ) _f a tank (5) which collects the washing liquid and which is arranged below the washing roller (k) and a pressure roller (7) which limits the amount of washing liquid and is located at the point of contact between the washing roller (4) and the cylinder 1 to be cleaned. 2. Apparatus according to claim 1 »characterized in that the washing roller (<}) is provided with felt or a similar resilient moisture-absorbent coating, a pressure roller (7) which expresses the excess liquid from the cover of the washing roller (k) is provided. 3. Device according to claim 1, characterized in that) The washing fluid is supplied from one or more, THE WASHER FLUID CLOSURE, along the entire length the washing roller (4) distributing openings (7) consists 4. Apparatus according to claim), characterized in that the sprinklers (6) are arranged in such a way that the cleaning liquid flows downwards at a small angle in 109Ü 15/0052 BAD OWGiNAL - 7 - train on the tangent to the washing roller (k) is sprayed. 5. Device according to one of the preceding claims, characterized in that the washing roller (4) is above and at a distance from the contaminated liquid in the collecting tank (5) is arranged. 6. Apparatus according to claim 5 »characterized in that that the contaminated washing liquid through cleaning filters (16,17) is fed back to the spray openings (6). ^ 7. Device according to one of claims 2 and 31 thereby characterized in that one is the mixing of the contaminated Liquid with the baffle plate (8) preventing the washing liquid supplied through the spray openings (6) for discharge the greater part of the liquid squeezed out of the felt is provided from the express location to the collection tank (5). 8. Device according to one of claims 2 to 7, characterized in that the pressure roller (7) is out of engagement with * the. Washing roller (4) can be brought, which is received in a bearing bracket (9) which can be swiveled away from the cylinder to be washed 9. Device according to claim 6, characterized in that the re-supply circuit in addition to the filters (16, 17) and a pump (15) has a collection tank (14) which allows large impurities to be deposited as sediments, and a pump with the washing liquid to the openings (ü) 109816/0052 such force promotes that the surface of the Waechwalze (4) flushing under pressure BAD ORIGINAL 10981R / 0052