US 5,174,209 AGranted

Method of washing a printing press with a washing apparatus

AssigneeHeidelberger Druckmaschinen AG

InventorsAnton Rodi, Hermann Beisel, Bernd Muller

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Abstract

A method of washing an offset printing press having a plate cylinder, a rubber blanket cylinder, an impression cylinder, an inking unit a paper thickness compensator and a damping unit. The inking unit and the damping unit include, respectively, inking rollers and damping solution applicator rollers. The offset printing press also includes a washing apparatus. The washing apparatus, when in the wash mode, is placed in engagement with the rubber blanket cylinder of the printing press by control apparatus. Also, in the wash mode, the impression cylinder is engaged with or disengaged from the rubber blanket cylinder by a paper thickness compensator. The usual purpose of the paper thickness compensator is to compensate for the thickness of the stock in running-on mode but is employed herein also to effectuate washing of various rollers and/or cylinders of the printing press.

Claims20

Dependent claims

A method for washing the cylinders and the rollers of an offset printing press, the offset printing press having an inking unit, a damping unit, a washing unit for supplying a washing solution, a blanket cylinder, a plate cylinder, an impression cylinder a paper thickness compensator, and a washing control circuit for controlling the flow of the washing solution through the printing press said method comprising the steps of:

actuating the washing control circuit to engage the washing unit with the blank cylinder;
selectively engaging or disengaging the impression cylinder with the blanket cylinder by means of the paper thickness compensator;
transferring washing solution from the washing unit to the blanket cylinder;
transferring washing solution from the blanket cylinder to the impression cylinder, whenever the impression cylinder is selectively engaged with the blanket cylinder by means of the paper thickness compensator;
and
washing with the washing solution the blanket cylinder and the impression cylinder, whenever the impression cylinder is selectively engaged with the blanket cylinder by means of the paper thickness compensator.

3 more elements

Dependencies are inferred from the claim text.