The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 1989
Filed:
Oct. 07, 1988
James W Cannon, Penfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
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.