The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1998
Filed:
Jun. 20, 1997
Peter Hummel, Offenbach, DE;
Robert Ortner, Alzenau, DE;
MAN Roland Druckmaschinen AG, , DE;
Abstract
An offset printing system includes an improved inking unit for applying ink to a rotatable plate cylinder, wherein the inking unit appreciably reduces the production of contaminants. In particular, the inking unit one or more ink application rollers that adjacently contact the plate cylinder. A series of rollers are in ink communication with these application rollers, including at least one inking roller in direct contact with the ink application rollers, and at least one inking roller in indirect inking communication with the ink application rollers. The inking rollers are driven in a positively locking manner and which are drivable at a peripheral speed that differs from the peripheral speed of the plate cylinder, and the inking roller furthest from the plate cylinder is driven with the greatest peripheral speed differential relative to the plate cylinder. This peripheral speed differential between rollers results in a relative slippage and wiping effect which advantageously reduces the effect of contaminants.