Strip length monitoring apparatus

Details Strip length monitoring apparatus Strip length monitoring apparatus

1976-09-15

1977-11-15

Christian, Leonard D.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

33127, B65H 7500, B65H 6100, G01B 504

Patent

active

040582663

ABSTRACT:
An apparatus for monitoring the length of a continuous strip of material, such as film, is disclosed. The apparatus includes an alternating current actuated supply motor which drives a rotatable shaft which retains and dispenses a roll of the strip. A capstan drive system receives the dispensed portion of the film from the shaft and a capstan drive shaft incrementally moves the film a predetermined length in steps. An alternating current actuated take-up motor drives a take-up member to take up the film from the capstan drive system. The output from two pairs of sensors operatively connected to the capstan drive system, a signal indicating the incremental movement of the film and the sinusoidal actuating signals are fed into an electronic circuit for monitoring the length of the film remaining on the shaft after a particular rotation and the length of the film on the take-up member.

REFERENCES:
patent: 3497957 (1970-03-01), Jorgensen
patent: 3921220 (1975-11-01), Primosch et al.
patent: 3980246 (1976-09-01), Deletzke, Jr.

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