Method for controlling the speed of horizontally rotatable suppl

Details Method for controlling the speed of horizontally rotatable suppl Method for controlling the speed of horizontally rotatable suppl

1998-03-19

1999-11-30

Jillions, John M.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Unwinding from coil center

2423342, 2423346, 352180, G11B 2506, B65H 5938, G03B 2148

Patent

active

059927801

ABSTRACT:
Method for controlling the speed of horizontally rotatable supply turntables for tape material. In such a method for controlling the speed by measurement on a moving tape, especially on a film tape (3) in cinema show operation by removal from the inside convolution (4) of a reel (2) resting horizontally thereupon, the lead-in angle in front of a lead-in point (6) fixed in location is contactlessly measured by reflection of infrared light on both sides of the film strip (5) fed in. In case of deviations of the measurement signal from a nominal value, the reel drive is corrected. A dual infrared LED with reflection light barriers (11, 12) arranged offset in angle and height and approximately focused on the lead-in point (6) is used.

REFERENCES:
patent: 2875667 (1959-03-01), Chedister
patent: 3248029 (1966-04-01), Money
patent: 3780959 (1973-12-01), Burth
patent: 3823890 (1974-07-01), Potts
patent: 4169566 (1979-10-01), Boudouris et al.
patent: 4996541 (1991-02-01), Mori et al.
patent: 5648834 (1997-07-01), Kitchen

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