Photographic film cassette with a moveable closing structure, ca

Details Photographic film cassette with a moveable closing structure, ca Photographic film cassette with a moveable closing structure, ca

1993-06-29

1995-12-19

Gellner, Michael L.

G03B 1726

Patent

active

054772990

ABSTRACT:
A photographic film cassette has a cassette shell, a spool contained in the cassette shell, and photographic film wound on the spool in a form of a roll. A leader of the photographic film is exited from the cassette shell through a passage mouth when the spool is rotated in the unwinding direction. A passageway is formed between the passage mouth and a roll chamber and has first and second inside faces which face respectively the emulsion and back surfaces of the photographic film. A first pair of ridges are formed on the first inside face, and contact on the emulsion surface in an area outside of exposure-designated image areas relative to a width of the strip of the photographic film. A second pair of ridges are formed on the second inside face, and contact on the back surface in an area outside of exposure-designated image area relative to the strip width. The two pairs ridges regulate a tendency of the photographic film to curl. In a preferred embodiment, a photographic film receiving gate of a camera is provided with a pair of ridges and pair of steps for regulation of the curl.

REFERENCES:
patent: 4221479 (1980-09-01), Harvey
patent: 4834306 (1989-05-01), Robertson et al.
patent: 4848693 (1989-07-01), Robertson
patent: 4880179 (1989-11-01), Beach
patent: 4948063 (1990-08-01), Niedospial, Jr.
patent: 4980713 (1990-12-01), Fujita et al.
patent: 5112003 (1992-05-01), Covington et al.
patent: 5174519 (1992-12-01), Oi et al.
patent: 5200777 (1993-04-01), Zander

Affiliated with

Also associated with

Rating

Photographic film cassette with a moveable closing structure, ca 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 with a moveable closing structure, ca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic film cassette with a moveable closing structure, ca will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-995185