Web breakage detector

Details Web breakage detector Web breakage detector

1992-09-24

1994-04-12

Burr, Edgar S.

Advancing material of indeterminate length

With material-responsive control means

Responsive to break or depletion

400708, 1014241, 101484, 226 45, 226196, B65H 2604

Patent

active

053018664

ABSTRACT:
In the case of a web breakage detector for web processing machines and more particularly for web feed printing machines, comprising a device for monitoring the web tension and adapted to produce a signal in the event of the web tension decreasing, a high degree of reliability and ease of operation are possible if said monitoring device is designed in the form of a pressure measuring device, which comprises a web pressure sensor for detecting the pressure in a gap delimited during normal operation on the one hand by the web and on the other hand by a stationary cover passed by the web, such sensor being adapted to produce a signal in the event of a pressure drop occurring in the gap.

REFERENCES:
patent: 4667946 (1987-05-01), Taguchi et al.
patent: 4838498 (1989-06-01), Huth
patent: 4968386 (1990-11-01), Nguyen
patent: 5052233 (1991-10-01), Rantala
patent: 5190201 (1993-03-01), Briggs

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