Hickey removal system
AssigneeDahlgren USA, Inc.
InventorNorman H. Kemp
Life of this patent
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Abstract
Foreign particles are removed from the plate cylinder of an offset press by interconnecting two ink form rollers friction driven by the plate roller and/or a vibrating roller to rotate in unison at different surface velocities. The connection between the form rollers maintains a fixed ratio between the surface velocities of the rollers which is other than 1:1 and causes the surface of at least one of the form rollers to wipe the surface of the plate.
Claims2
A method of removing foreign particles from the surface of the plate cylinder in a lithographic press having at least two ink rollers in surface contact therewith comprising the steps of:
- (a) directly interconnecting two ink rollers which are in surface contact with the plate cylinder in a lithographic press so that the ratio of the surface velocities of said ink rollers is fixed and is other than 1:1;
- and
- (b) rotating said ink rollers only by friction contact with the surfaces of said ink rollers.
Dependencies are inferred from the claim text.