Patent
1988-10-07
1989-10-31
Gellner, Michael L.
354106, G03B 112, G03B 1724
Patent
active
048780758
ABSTRACT:
In a photographic camera, a motorized film transport is operated in a prewind mode to continuously advance successive unexposed frames of a filmstrip from a light-tight cassette to a film take-up, without exposing any of the film frames at the focal plane of an objective lens, and is operated in a rewind mode to position respective unexposed frames for exposure at the focal plane and to return them individually to the cassette following each exposure. Before an exposed frame is returned to the cassette, a double exposure prevention (DEP) encodement is applied to the filmstrip at a predetermined location proximate the exposed frame. If the filmstrip is rewound into the cassette prematurely, i.e. without it being completely exposed, and at a later time the cassette is re-loaded into the camera, the film transport will be operated in the pre-wind mode only until a DEP encodement is sensed. Then, the film transport will be operated in the rewind mode to return the exposed frame corresponding to the sensed encodement to the cassette and to position the next-available unexposed frame for exposure at the focal plane.
REFERENCES:
patent: 2674009 (1954-04-01), Williams
patent: 3999842 (1976-12-01), Niederhauser et al.
patent: 4146312 (1979-03-01), Amikura et al.
patent: 4198136 (1980-04-01), Staudacher et al.
patent: 4340286 (1982-07-01), Carr
Eastman Kodak Company
Fields Roger A.
Gellner Michael L.
LandOfFree
Camera apparatus for preventing double exposure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Camera apparatus for preventing double exposure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Camera apparatus for preventing double exposure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-628468