Photocopying – Contact printing – Light boxes
Patent
1989-10-25
1990-06-05
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355296, G03G 1500, G03G 2100
Patent
active
049318349
ABSTRACT:
An image forming apparatus includes a rotatable image carrier, a motor for rotating the carrier forwardly and reversely, and transmission mechanisms for transmitting the drive force of the motor to a driven portion other than the image carrier when the carrier is being rotated forwardly and for cutting off the driving force from the driven portion when the carrier is being rotated reversely. Each transmission mechanism has a first gear rotated forwardly and reversely in synchronism with the image carrier by the motor, a second gear engaging with the driven portion, an intermediate gear in mesh with the first gear and capable of meshing with the second gear, and an arm for supporting the intermediated gear. While first gear is forwardly rotated, the intermediate gear is subjected a force in the direction for engagement with the second gear. While the first gear is rotated reversely, the intermediate gear is subjected a force in the direction for disengagement from the second gear.
REFERENCES:
patent: 4401385 (1983-08-01), Katayama et al.
patent: 4555173 (1985-11-01), Iseki et al.
patent: 4769669 (1988-09-01), Watanabe
patent: 4806968 (1989-02-01), Watanabe et al.
Grimley A. T.
Kabushiki Kaisha Toshiba
Royer William J.
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