Patent · US Expired

System to detect abnormal paper feed in printers

US3949856A · kind A · utility

49Cited by

9References

1Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Armin Ulber · Selters (Westerwald), DE
Gerhard Muller · Grafing, DE

Key dates

Filing date	Nov 16, 1973
Grant date	Apr 13, 1976
Priority date	—
Expiry date	Nov 16, 1993

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J11/28
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A system for monitoring the paper feed in printing mechanisms and the like, in which reference signals are derived in response to actuation of the feeding means for the paper web and in synchronism with the feed movement thereof, which signals may be compared with supervisory signals generated in response to advancing movement of the paper web, whereby predetermined abnormal relation between the reference and supervisory signals forms a criterion of improper paper advance conditions.

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