Patent · US Expired

Method of and apparatus for locating the ends of webs

US5292397A · kind A · utility

5Cited by

3References

18Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Bernhard Lorenz · Marzling, DE
Christian Richter · Dublin, IE
Rainer Tuercke · Taufkirchen, DE

Key dates

Filing date	Nov 18, 1992
Grant date	Mar 8, 1994
Priority date	—
Expiry date	Nov 18, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG03B1/60
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

The trailing end of a web of photosensitive material which is being unwound from a core in a cassette is connected to the core by an elongated strip. A monitoring device is placed adjacent the path of movement of the web from the core to the nip of two advancing rolls, and the monitoring device is activated as soon as it detects the strip. The motor for the advancing rolls is driven for an interval of time and at a speed such that, when the monitoring device detects the trailing end of the strip, the web is advanced through a predetermined distance to locate its trailing end at a splicing station where the trailing end of the web is to be spliced with the leader of a next-following web.

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