Method and apparatus for inspecting resistance to film draw-out

Details Method and apparatus for inspecting resistance to film draw-out Method and apparatus for inspecting resistance to film draw-out

1989-05-18

1990-05-15

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

340675, B65H 1810

Patent

active

049251198

ABSTRACT:
A method for inspecting resistance to film draw-out comprises the steps of holding a magazine in which photographic film wound around a spool is accommodated, rotating the spool in the direction that winds up the film around the spool, detecting the movement of a film leader, which has been drawn out from the magazine, to the magazine, and measuring the force required to rotate the spool when the movement of the film leader is detected. An apparatus for inspecting resistance to film draw-out comprises a magazine holder, and a spool rotation device for rotating the spool in the direction that winds up the film around the spool. A rotating force measurement device measures the force required for the spool rotation device to rotate the spool, and a film movement detector detects the movement of a film leader, which has been drawn out from the magazine, to the magazine. A device receives the output of the film movement detector and samples the output of the rotating force measurement device when the movement of the film leader is detected by the film movement detector.

REFERENCES:
patent: 3823895 (1974-07-01), Jones et al.
patent: 3999197 (1976-12-01), Iwashita et al.
patent: 4483492 (1984-11-01), Tokuda
patent: 4696440 (1987-09-01), Harigaya et al.
patent: 4726542 (1988-02-01), Nakayama et al.

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