Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1982-08-02
1984-10-16
Mathews, A. A.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
354212, 242 716, 226 84, G03B 124
Patent
active
044771622
ABSTRACT:
A camera includes an internal cover plate which is supported independently of a camera back cover for movement between covering and uncovering positions where it covers and uncovers a film take-up chamber respectively. When the internal cover plate is in the covering position, its inner surface contacts a leader portion of a film pulled out of a film cartridge received in a film cartridge chamber, for preventing a sprocket hole of the leader portion of the film having engaged one of sprocket pawls of a sprocket from being disengaged therefrom. The sprocket is provided at a position past an exposure station for transportation of the film toward the film take-up chamber. When the camera back cover is held in an open position, the film transportation by the sprocket is automatically effected by an electric motor in response to the movement of the internal cover plate from the uncovering position to the covering position and the leader portion of the film transported into the film take-up chamber is automatically wound around a spool by engagement of one of the sprocket holes with one of spool pawls of the spool. The film transportation in this case is automatically interrupted when an initial frame of the film comes in alignment with an exposure aperture at the exposure station. The internal cover plate is releasably locked in the covering position by a detent member.
REFERENCES:
patent: 3377936 (1968-04-01), Goshima et al.
patent: 3384319 (1968-05-01), Saito et al.
patent: 3387546 (1968-06-01), Winkler et al.
patent: 4239362 (1980-12-01), Katayama et al.
Research Disclosure, Eastman Kodak, No. 20404, "Film Take-Up Reel for Photographic Camera" p. 152, Klaus Sitzler.
Mathews A. A.
Minolta Camera Kabushiki Kaisha
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