Patent · US Expired

Offset printing device for a rotary printing machine

US6006664A · kind A · utility

8Cited by

4References

7Claims

0Family size

Assignee

MAN Roland Druckmaschinen AG · DE

Inventors

Peter Hummel · Offenbach, DE
Robert Ortner · Alzenau, DE

Key dates

Filing date	Jun 20, 1997
Grant date	Dec 28, 1999
Priority date	—
Expiry date	Jun 20, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41P2200/21
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An offset printing device is provided for a rotary printing machine having a plate cylinder carrying a dry flatbed printing plate, the printing device having an improved inking unit which reduces the occurrence and effect of contaminants. In the inking unit, at least one ink application roller, which is frictionally engaged against the plate cylinder during printing, is drivable by at least one positively driven inking roller at a peripheral speed which is different from the peripheral speed of the plate cylinder. In an embodiment, a plurality of ink application rollers contact the plate cylinder and are respectively driven at successively differing peripheral speeds.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.