Web tension and break sensor system for photosensitive web proce

Details Web tension and break sensor system for photosensitive web proce Web tension and break sensor system for photosensitive web proce

1982-09-02

1985-07-30

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

226 11, 226 25, 242 57, 354321, 340668, G08B 1900

Patent

active

045325006

ABSTRACT:
A sensing system senses web movement and web tension of a photosensitive web moving through a processor. The system includes a sensing arm pivotally attached about a pivot to the processor and a transport roller rotatably attached to one end of the sensing arm. The photosensitive web engages the transport roller such that the roller rotates. The other end of the sensing arm, on an opposite side of the pivot point, is biased in a direction opposing the web tension of the photosensitive web. A tension detecting mechanism detects the movement of the sensing arm when the web tension overcomes the biasing force and transmits an alarm signal indicating that the web tension has increased beyond a predetermined value. A web break detecting mechanism is preferably included and detects the rotation of the transport roller and transmits a signal when the transport roller stops rotating indicating that a web break has occurred.

REFERENCES:
patent: 2048182 (1936-07-01), Ybarrondo
patent: 2555949 (1951-06-01), Wilson
patent: 2688125 (1954-08-01), Mills
patent: 2727226 (1955-12-01), Giskes et al.
patent: 4067035 (1978-01-01), Plursch et al.
patent: 4099193 (1978-07-01), Leuchter et al.

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