Photocopying – Contact printing – Light boxes
Patent
1987-06-23
1989-05-09
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355210, G03G 2100
Patent
active
048293350
ABSTRACT:
A process cartridge containing as a unit a photosensitive drum and processing elements for repetitive image formation on the photosensitive drum. The process cartridge is mountable into an image forming machine. The process cartridge is provided with a helical gear for driving the photosensitive drum. The helical gear is engaged with another helical gear in the image forming machine, when it is mounted into the image forming machine. The helical gears are twisted in such directions that when the photosensitive drum is driven, the photosensitive drum is urged toward a rear side of the apparatus, whereby during an image forming operation, the process cartridge and/or the photosensitive member is correctly positioned. More particularly, the helical gear of the process cartridge is twisted in a direction which is the same as the direction of rotation of the photosensitive drum during the image forming operation.
REFERENCES:
patent: 3966316 (1976-06-01), Pfeifer et al.
patent: 4425036 (1984-01-01), Kameyama et al.
patent: 4552030 (1985-11-01), Szecsei
patent: 4575221 (1986-03-01), Onoda et al.
patent: 4588280 (1986-05-01), Ogawa et al.
patent: 4591258 (1986-05-01), Nishino et al.
Ebata Tokihide
Kanemitsu Shinji
Braun Fred L.
Canon Kabushiki Kaisha
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