DE2344029A1 - DEVICE FOR CLEANING SINGLE ROLLERS OF PRINTING MACHINES - Google Patents

Description

Patent attorneys

DipL-lnp.R.BEETZ sen.
Dipl.-Sr.c ,. ; ί. LAMP LAW

Dr.-lng.R.BEETZ jr. Munich 22, Steinsdorfstr. 10

August 197 ;;

N.V. TOOLS LIMITED, Brentwood, Essex (Great Britain)

Device for cleaning inking rollers of printing machines

The invention relates to printing machines and, more particularly, to devices for cleaning inking rollers that are used in printing machines to transfer printing ink from an ink tray to a plate cylinder or a transfer cylinder is needed.

For the sake of good and clean printing, the cylindrical surfaces of inking rollers must often be cleaned, e.g. when changing from To remove paint residues from one color to another, or to remove paper dust stains or dried paint.

67- (22 074) -Bgn-r (8)

409810/0506

It is an object of the invention to provide an improved device to create by means of which such cleaning of inking rollers quickly and can be carried out effectively.

The invention relates to a device for cleaning inking rollers of printing machines and consists in the fact that a doctor blade can be displaced in the longitudinal direction on a carriage relative to the roller and is held against the cylindrical surface of the roller. The knife is preferably pneumatic on the roller pressed, and the knife can be adjusted to the cylinder axis and can be set parallel or at an angle.

In the drawing shows

1 shows an embodiment of the cleaning device according to the invention in side view,

Fig. 2 the same in plan view.

In this embodiment, the cleaning device includes a scraper 1, which is in a knife holder 2 with a knife clamp 3 is attached. This whole is held at its ends by piston rods 11, which consist of pneumatic actuating cylinders 4 protrude and by means of which the knife 1 is withdrawn from the inking roller 12 or pressed against it, with variable contact pressure can be pressed.

409810/0506

In order to ensure the best cleaning effect, the knife can by means of an adjusting screw 5 and a pivot pin 13 on the knife holder 2 can be adjusted. The length of the knife 1 can be chosen depending on the design conditions, but should be less than the axial length of the inking roller 12 with which the knife is intended to work together.

The scraper as a whole and its pneumatic actuating cylinder are attached to a slide 7 by means of fastening pieces 6, which is mounted on a tube 8 in a longitudinally displaceable manner. Of the Carriage 7 and pipe 8 are keyed and keyway so that the carriage cannot rotate about the pipe.

Inside the tube 8, a magnetic bolt is arranged, which by means of compressed air at a controlled speed from one to the the other end of the tube can be moved and thereby the carriage and the knife in the longitudinal direction along the inking roller 12 moves.

The angle of the doctor blade 1 can vary from the horizontal, i.e. H. from the parallel to the axis of the roller 12, in both directions by pivoting one or each cylinder 4 about its pivot pin 13 - the fastening pieces 6 have longitudinal holes which these Allow adjustment - be tilted. This is supposed to be the drain facilitate the paint to be removed from the roller in a waste trough 9; this trough 9 is held by a holder 10, which is also used for fastening the entire device in the printing machine

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serves. The waste trough 9 can easily be removed for emptying and cleaning or it can be permanently attached and then provided with flushing and draining lines.

When cleaning, a solvent must be applied to the roller 12 to make the paint fluid and to facilitate its removal.

The solvent is preferably sprayed on _y, for example, by hand from a spray bottle or automatically either from a number of nozzles fixedly attached along the roller or from a movable nozzle that moves with the carriage 7.

Of course , within the scope of the invention, a variety of "waste water treatments" are possible. For example, other means can also be provided for driving the carriage and thus the knife over the length of the roller.

Such a means can be a pneumatic servomotor that drives a tickle along a rack, which can be brought about more quickly by a spring or by weights at the end of a rope attached to the slide. Adjustable release mechanism. what the limits of the middle movement, certain limits, can be provided.

As further substitute options can be electric or pnetinaatiselier Drive of the slide by means of Ketteritrielbes or by means of

40981 * 0/0508

two-start Archimedean screw can be provided.

If the inking roller 12 is very long, it may be advisable to have two or more doctor blade devices along it the roller, each device with its own movable carriage to be provided.

AO 9 810/0506

Claims (14)

Expectations ( 1. \ Before device for cleaning inking rollers of printing machines, characterized in that a doctor blade (1) can be moved in the longitudinal direction on a carriage (7) relative to the roller (12) and is held against the cylindrical surface of the roller. 2. Apparatus according to claim 1, characterized in that the knife (1) to the roller (12) by a pneumatic device (4) is pressed. 3. Device according to claim 2, characterized in that the knife (l) is held in a component group (2-6) which in turn is held on the slide (7) by the pneumatic device in the form of actuating piston-cylinder units (4). 4. Apparatus according to claim 3, characterized in that the component group holding the knife contains a device (5) through which the position of the knife (l) relative to the roller (12) can be adjusted. 5. Apparatus according to claim. 3 or 4, characterized in that the knife (1) can be adjusted skewed to the axis of the roller (12). 40981 0/0506 6. Apparatus according to claim 5, characterized in that the knife (l) can be adjusted crookedly by moving one of the two actuating piston-cylinder units (4) relative to the other of these adjusted in both units. 7. Device according to any one of claims 1 to 6, characterized characterized in that the carriage (7) is longitudinally displaceable eimeff guideway (tube 8) is attached, which is parallel to Axis dear "roller (12) extends. 8 * Execution according to claim 7, characterized in that the slide (7) on the guide track (8) takes place by means of an imtaigpetiscöeEE bolt which is inside the guide bate; (This! obres §0 is arranged displaceably and can be moved by a • msm aaadtares Endie of the guide track (8) with controlled speed at least *. 9- device according to claim 8, characterized in that the YerscMebumg of the magnetic bolt is done by compressed air. 10- VorrieMumg according to claim 7, characterized in that the slide is moved on the guideway by a motor-driven gear that meshes with a rack. 11. The device according to claim 10, characterized in that 409S10 / 0508 the slide is only in one direction due to the pinion and rack is moved in the other direction by means of a quick return device by weight or by spring force. 12. Apparatus according to claim 7, characterized in that the slide is moved along the guideway by means of a motor-driven chain drive. 13. Apparatus according to claim 7, characterized in that the slide is moved on the guideway by means of a two-start Archimedean screw. 14. Device according to one of the preceding claims, characterized through a spray nozzle that moves with or on the carriage (7) and sprays solvent onto the roller (12). 0 9 810/0506 Blank page