Automatic flat width control

Details Automatic flat width control Automatic flat width control

1975-08-27

1976-11-16

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

250560, 356167, G01B 1104, G01B 1102

Patent

active

039921077

ABSTRACT:
The width of a continuously moving flat material, such as a web, or a film sheet, or a flattened tubular plastic film, in manufacture or in process, is continuously monitored by non contacting sensor means which scan the material by oscillating transversely across its moving edges. Departures from a preselected desired width are detected and signals are developed corresponding to the magnitude of a departure, and to whether it constitutes an increase or a decrease from the preselected width. The signals thus developed may be translated into visual or other sensible indicia and may also be applied to make appropriate changes in process control to reattain the set point width of the material being monitored.

REFERENCES:
patent: 3365699 (1968-01-01), Foster
patent: 3549890 (1970-12-01), Keller

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