Patent · US Expired

Ribbon lift mechanism for typewriters and the like machines

US4460287A · kind A · utility

5Cited by

4References

4Claims

0Family size

Assignee

Triumph-Adler A.G. fur Buro- und Informationstechnik · DE

Inventors

Rolf Theilen · Fürth, DE
Manfred Kleinhanns · Feucht, DE

Key dates

Filing date	Mar 16, 1983
Grant date	Jul 17, 1984
Priority date	—
Expiry date	Mar 16, 2003

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J35/10
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An improved ribbon lift mechanism for alternately raising a ribbon from a lowered position to first and second elevations relative to a print line. A ribbon lift lever is raised by a cam ring having alternating high and low lift cams separated by valleys for acting on a cam follower directly connected to the ribbon lift lever. The cam ring is indexable by a cyclically movable powered lever which acts to control a locking lever to lock the raised ribbon lift lever at said first and second elevations and to release it for return to lowered position incident to a cycle of the powered lever. The arrangement allows an economy of parts and operation by a relatively weak power source.

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