Method of forming a film end in a reverse curl to facilitate its

Details Method of forming a film end in a reverse curl to facilitate its Method of forming a film end in a reverse curl to facilitate its

1995-02-21

1996-04-09

Hayes, Monroe H.

354275, G03B 100

Patent

active

055066496

ABSTRACT:
A method of forming a reverse curl or similar crimp in a leading film end of a filmstrip to facilitate extraction of the leading film end from a film cartridge, comprises several steps. First, the leading film end is secured to a film take-up spool in a reverse curl or similar crimp which is opposite to an inherent curl of the filmstrip, to cause the leading film end to be set in the reverse curl. Then, the filmstrip is wound in conformity with its inherent curl into a film roll on the film take-up spool. And finally, the filmstrip is wound in conformity with its inherent curl into a film roll on a cartridge spool inside the film cartridge. As a result, the leading film end will be situated inside the film cartridge in the reverse curl to cause the leading film end to separate from the film roll inside the film cartridge in order to facilitate extraction of the leading film end from the film cartridge. Separating the leading film end from the film roll inside the film cartridge allows a manual film extractor to be slipped beneath the leading film end to engage the leading film end and pull it out of the film cartridge.

REFERENCES:
patent: 3195828 (1965-07-01), Kuckhoff et al.
patent: 3578258 (1971-05-01), Gronton et al.
patent: 3622099 (1971-11-01), Bishop
patent: 3944155 (1976-03-01), Wilczewski et al.
patent: 4213578 (1980-07-01), Katata
patent: 4880181 (1989-11-01), Drahanowsky
patent: 4974788 (1990-12-01), Covington
patent: 5452033 (1995-09-01), Balling et al.

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