Photography – Having camera indicator – Film condition indicator
Reexamination Certificate
2000-05-04
2001-03-20
Gray, David M. (Department: 2851)
Photography
Having camera indicator
Film condition indicator
C396S411000, C396S538000
Reexamination Certificate
active
06205295
ABSTRACT:
FIELD OF THE INVENTION
The invention relates generally to the field of photography, and in particular to cameras. More specifically, the invention relates to a camera with a film-door-lock indicator.
BACKGROUND OF THE INVENTION
It is well known for a camera to have a cartridge receiving chamber for a film cartridge with a film leader that can be advanced from the film cartridge in preparation for film exposure and can be wound into the film cartridge after film exposure. Typically, a film door is movable open to open the chamber and is movable closed to close the chamber, and a door lock is movable to lock the film door closed and is movable to release the film door.
SUMMARY OF THE INVENTION
A camera comprising a cartridge receiving chamber for a film cartridge with a film leader that can be advanced from the film cartridge in preparation for film exposure and can be wound into the film cartridge after film exposure, a film door movable open to open the chamber and movable closed to close the chamber, and a door lock movable to lock the film door closed and movable to release the film door, is characterized in that:
a film sensor is originally positioned to be moved by the film leader as the film leader is advanced from the film cartridge; and
a dual purpose indicator and blocker is connected to the film sensor to be moved to block the door lock from being moved to release the film door and to provide a visible indication when the film sensor is moved by the film leader, whereby the dual purpose indicator and blocker prevents the film door from being opened and warns that the film leader has been advanced from the film cartridge in preparation for film exposure.
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patent: 5565951 (1996-10-01), Tokui
patent: 5600393 (1997-02-01), Funahashi
patent: 5625432 (1997-04-01), Omi
Williams Patricia L.
Zander Dennis R.
Eastman Kodak Company
Fields Roger A.
Gray David M.
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