Patent · US Expired

Auxiliary drive for the ductor roller of a sheet-fed offset press

US5136940A · kind A · utility

2Cited by

8References

10Claims

0Family size

Assignee

MAN Roland Druckmaschinen AG · DE

Inventors

Joachim Olek · Obertshausen, DE
Heinrich Ochs · Koblenzer Straße, DE
Kurt Difflipp · Dietzenbach, DE

Key dates

Filing date	Apr 26, 1991
Grant date	Aug 11, 1992
Priority date	—
Expiry date	Apr 26, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41F31/10
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An auxiliary drive for the ductor roller of a sheet-fed offset press continues to advance the ductor roller in small angular steps during press stoppages. The damping unit drive which continues to run during press stoppages drives the ductor roller stepwise by way of an eccentric drive linkage and a ratchet wheel disposed on the ductor roller journal. When the press is running, a rocker lever in the drive linkage can be pivoted away from the throw zone of the eccentric for example, by a piston actuated by oil pressure of the press's oil supply system. In alternative embodiments, the lever arm can be pivoted away by a compressed air cylinder or a suction cylinder which become operative when the press is running.

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