Photography – With film drive – Mechanical detail
Reexamination Certificate
2000-01-06
2001-08-21
Perkey, W. B. (Department: 2851)
Photography
With film drive
Mechanical detail
C396S440000, C396S536000, C396S538000
Reexamination Certificate
active
06276846
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 having a film platen that is at least partially retracted from over a backframe opening to provide a film entry zone for a film leader into the backframe opening and having a film support that is deployed to the film entry zone to prevent the film leader from becoming jammed in the backframe opening.
BACKGROUND OF THE INVENTION
Commonly assigned U.S. Pat. No. 5,909,601 issued Jun. 1, 1999 discloses a camera comprising a cartridge receiving chamber for a film cartridge with a filmstrip having a protruding film leader, a film take-up chamber, a film door that opens and closes to uncover and re-cover the cartridge receiving chamber, a rearwardly open backframe opening between the cartridge receiving and film take-up chambers for exposing successive sections of the filmstrip, a rear film platen positioned over the backframe opening to support each section of the filmstrip at the backframe opening, a light-trapping film entry slot between the cartridge receiving chamber and the backframe opening, and a film support positioned within the backframe opening proximate the exposed film take-up chamber to prevent the film leader from becoming jammed in the backframe opening when the film cartridge is placed in the cartridge receiving chamber and the protruding film leader is longitudinally advanced through the film entry slot and along the backframe opening to the exposed film take-up chamber. When the film door is opened, it pulls the film platen toward the cartridge receiving chamber without uncovering the backframe opening, and the film platen in turn pivots the film support to a leader supporting position in the backframe opening.
Conversely, when the film door is closed, it pushes the film platen back from the cartridge receiving chamber without uncovering the backframe opening, and the film platen in turn pivots the film support out of the leader supporting position.
SUMMARY OF THE INVENTION
According to one aspect of the invention, a camera comprising a cartridge receiving chamber for a film cartridge with a filmstrip having a protruding film leader, a film door that opens and closes to uncover and re-cover the chamber, a backframe opening for exposing successive sections of the filmstrip, a film platen positioned over the backframe opening to support each section of the filmstrip at the backframe opening, and a film support positioned within the backframe opening to prevent the film leader from becoming jammed in the backframe opening when the film cartridge is placed in the chamber, is characterized in that:
the film platen is movable to at least partially uncover the backframe opening in order to provide a film entry zone for the film leader into the backframe opening when the film door is opened; and
the film support is coupled with the film platen for movement to the film entry zone to be positioned to prevent the film leader from becoming jammed in the backframe opening when the film platen is moved to partially uncover the backframe opening.
According to another aspect of the invention, a camera comprising a main body part including a cartridge receiving chamber for a film cartridge with a filmstrip having a protruding film leader and a backframe opening for exposing successive sections of the filmstrip, a film door that opens and closes to uncover and re-cover the chamber, a rear cover part, and a film platen between the backframe opening the rear cover part for supporting each section of the filmstrip at the backframe opening, is characterized in that:
the rear cover part has a rear opening opposite a defined region of the backframe opening which is proximate the chamber; and
the film platen is movable to uncover the defined region of the backframe opening in order to permit the defined region to serve as a film entry zone for the film leader into the backframe opening when the film door is opened.
According to another aspect of the invention, a camera comprising a cartridge receiving chamber for a film cartridge with a filmstrip having a protruding film leader, a backframe opening for exposing successive sections of the filmstrip, and a film support movable to a leader supporting position within the backframe opening to prevent the film leader from becoming jammed in the backframe opening when the film cartridge is placed in the chamber and reversible to be retracted from the leader supporting position, is characterized in that:
the film support is a flexible support strip having a pair of ends; and
a fixed support is positioned between the ends of the flexible support strip for the flexible support strip to continuously bend about the fixed support as the flexible support strip is moved to the leader supporting position and is reversed.
REFERENCES:
patent: 3479938 (1969-11-01), Winkler et al.
patent: 4482229 (1984-11-01), Sugiura
patent: 4530582 (1985-07-01), Hara et al.
patent: 4974787 (1990-12-01), Arai et al.
patent: 5546148 (1996-08-01), Janson, Jr.
patent: 5903789 (1999-05-01), Zander et al.
patent: 5909601 (1999-06-01), Zander
patent: 5940643 (1999-08-01), Fuss
patent: 5988894 (1999-11-01), Zander
Williams Patricia L.
Zander Dennis R.
Eastman Kodak Company
Fields Roger A.
Perkey W. B.
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