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US 5,842,419 AGranted
Plate end ejector for plate cylinder
AssigneeKoenig & Bauer-Albert Aktiengesellschaft
InventorHelmut Puschnerat
Life of this patent
Estimating the term…
Abstract
A flexible plate is removed from the surface of a cylinder in a rotary printing press by supplying a fluid under pressure to a chamber into which the plate ends have been inserted. The fluid under pressure creates a positive pressure in the chamber which is sufficient to push at least one of the plate ends out of the chamber.
Claims6
A plate end ejector for a plate cylinder in a rotary printing press comprising:
- a plate cylinder having a plate cylinder body;
- a peripheral surface on said plate cylinder body;
- a bore formed within said plate cylinder, said bore being defined by a face portion of said plate cylinder body;
- said bore being capable of receiving a rotatable pivot shaft;
- a flexible plate end receiving slit in said plate cylinder body, said flexible plate end receiving slit extending generally radially inwardly into said plate cylinder body from said peripheral surface and defining a plate end receiving chamber in said plate cylinder body;
- a pressure fluid supply line in said plate cylinder body and in fluid communication with said plate end receiving chamber;
- and
- at least one pressure fluid outlet opening extending within said plate cylinder body between said pressure fluid supply line and said plate end receiving chamber defined in said plate cylinder body by said flexible plate end receiving slit.
5 more elements
A method for ejecting a plate end from a jacket surface of a cylinder in a rotary printing press including:
- providing a cylinder having a cylinder body;
- providing a peripheral surface on said cylinder body;
- providing a bore formed within said cylinder, and defining said bore by a face portion of said cylinder body and further adapting said bore to receive a rotatable pivot shaft;
- providing a plate end receiving slit in said cylinder body extending generally radially inwardly into said cylinder body from said peripheral surface;
- defining a plate end receiving chamber in said cylinder body including said plate end receiving slit;
- providing a pressure fluid supply line in said cylinder body;
- providing at least one pressure fluid supply opening extending within said cylinder body between said pressure fluid supply line and said plate end receiving chamber;
- supplying fluid under pressure to said plate end receiving chamber from said pressure fluid supply line through said at least one pressure fluid supply opening;
- generating a positive pressure in said plate end receiving chamber;
- and
- causing ejection of said plate end from said plate end receiving slit by said positive pressure generated in said plate end receiving chamber.
8 more elements
Dependencies are inferred from the claim text.