Photographic film cassette

Details Photographic film cassette Photographic film cassette

1992-06-11

1993-06-15

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, G03B 1726

Patent

active

052191281

ABSTRACT:
A photographic film cassette has light-trapping members attached to a film passage mouth in order to close the film passage mouth. The inner end portions of the light-trapping members are spaced apart from each other so as to enable easy entrance of a leading end of a photographic film in between the light-trapping members. A frictional coefficient of the light-trapping member against the photographic film is 0.25 or less. The light-trapping member satisfies a following formula: 0.6 mm<T.sub.2 -T.sub.1 <4.0 mm, wherein T.sub.2 is the thickness of each light-trapping member under a load of 20 g/cm.sup.2 and T.sub.1 is the thickness of each light-trapping member under a load of 100 g/cm.sup.2.

REFERENCES:
patent: 3404613 (1968-10-01), MacGregor et al.
patent: 3537376 (1970-11-01), Fleming et al.
patent: 4034929 (1977-07-01), Ebner, Jr.
patent: 4074870 (1978-02-01), Kaufman

Affiliated with

Also associated with

Rating

Photographic film cassette does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic film cassette, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic film cassette will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1037897