Photography – Camera detail – Detachable or removable film holder unit
Reexamination Certificate
1994-10-26
2001-04-24
Adams, Russell (Department: 2851)
Photography
Camera detail
Detachable or removable film holder unit
C396S538000
Reexamination Certificate
active
06220770
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an improvement in a camera adapted to use a film cartridge having a movable light shield door.
2. Related Background Art
Cameras each having a movable light shield door opening/closing device for opening/closing a movable light shield door formed on a film cartridge are disclosed in Japanese Laid-Open Patent Application Nos. 1-191836 and 1-191837. In these prior arts, when a switch for detecting if a cartridge chamber cover is closed detects that the cartridge chamber cover is closed, a movable light shield door is opened, and a film is extracted via the movable light shield door to prevent film exposure. After a predetermined period of time has elapsed from the end of the rewind operation of a film, if the movable light shield door remains open, an alarm is generated. Furthermore, the prior art describes an embodiment which prevents inadvertent exposure of a film by inhibiting the cartridge chamber cover from being opened when the movable light shield door is open.
A movable light shield door is also disclosed in U.S. Pat. No. 4,938,429. In this reference, a light shield door is opened/closed by pivoting a rotatable shaft.
In the above-mentioned prior arts, an operation member for opening/closing the cartridge chamber cover of a camera is locked while the movable light shield door is open. A lock member for locking the operation member is operated integrally with the movable light shield door by the driving force from a motor. In this arrangement, if the movable light shield door cannot be mechanically closed due to some accident (for example, the motor is locked or a film portion is extracted from a cartridge), the lock member cannot be operated even if the lock member can be forcibly externally operated.
Therefore, in the above-mentioned prior art, when the movable light shield door cannot be closed due to some accident, the cartridge chamber cover of the camera can never be opened, and the film cartridge cannot be unloaded.
SUMMARY OF THE INVENTION
One aspect of the present invention is to provide a camera or apparatus adapted to use an image recording medium cartridge having a cover for allowing an image recording medium to exit from or withdraw into the image recording medium cartridge, or a device adapted in the camera or apparatus, which camera or apparatus comprises inhibition means for inhibiting the cartridge from being unloaded from the camera or apparatus cartridge loaded in the camera or apparatus is open, and disabling means for disabling an operation of the inhibition means when the cover of the cartridge loaded in the camera or apparatus is open, which camera or apparatus allows the cartridge to be unloaded from the camera or apparatus even when the cover of the cartridge loaded in the camera or apparatus is kept open and cannot be closed due to some accident.
Other aspects of the present invention will become apparent from the following description of the preferred embodiments.
REFERENCES:
patent: 4339193 (1982-07-01), Harvey
patent: 4938429 (1990-07-01), Robertson et al.
patent: 5231438 (1993-07-01), Smart
patent: 5432575 (1995-07-01), Funahashi
patent: 5473401 (1995-12-01), Tsunefuji
patent: 5495310 (1996-02-01), Takatori
patent: 5565951 (1996-10-01), Tokui
patent: 5754904 (1998-05-01), Izukawa
patent: 0 545 098 (1993-06-01), None
patent: 1-191836 (1989-08-01), None
patent: 1-191837 (1989-08-01), None
patent: 5-150344 (1993-06-01), None
Official Communication dated Jan. 29, 1999.
Patent Abstract of Japan, vol. 13, No. 482; (P-953) Nov. 2, 1989.
Patent Abstract of Japan. vol. 17, No. 539; (P-1621) Sep. 28, 1993, Same As Abstract for Doc. 5-150344 Listed Above.
Adams Russell
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Mahoney Christopher E.
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