Patent
1993-12-09
1994-12-13
Gray, David M.
354298, 354314, G03B 100, G03D 1300
Patent
active
053733371
ABSTRACT:
A method, and apparatus for performing the method, of detecting excessive core set film curl of a filmstrip wound within a film cartridge of the type having a light trapping film slit through which the leading end of the filmstrip may be advanced or retracted, whereby excessively curled filmstrips may be pre-sorted prior to photofinishing operations. The method and apparatus comprises the steps of and means for positioning the film cartridge with the light trapping slit thereof oriented in a predetermined position, unwinding the leading end of the filmstrip a predetermined distance out of the light trapping slit of the film cartridge, whereby the unwound leading end of the filmstrip may freely curl back in the direction in which the filmstrip is wound within the film cartridge to the extent that the filmstrip exhibits core set film curl, and detecting an excessive degree of core set film curl by the amount to which the unwound leading end of the filmstrip curls back toward the film cartridge. Thereafter, the leading end may be rewound into the cartridge and cartridges found to contain excessively curled filmstrips may be separated from those containing filmstrips exhibiting a normal range of core set film curl.
REFERENCES:
patent: 3552563 (1971-01-01), Smith
patent: 4632533 (1986-12-01), Young
patent: 4933693 (1990-06-01), Beach
Eastman Kodak Company
Gray David M.
Pincelli Frank
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