Photocopying – Contact printing – Light boxes
Patent
1990-06-20
1992-11-17
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355246, 355261, 355264, 355265, G03G 1506
Patent
active
051647737
ABSTRACT:
A developing device using a one-component developer composed of toner particles includes a developing roller rotatably provided within the vessel, a portion of the developing roller being exposed therefrom and resiliently pressed against a surface of a photosensitive drum. The toner particles are entrained by the roller surface to form a developer layer therearound and are carried to the drum surface for the development of an electrostatic latent image formed thereon, and a blade member is engaged with the roller for regulating a thickness of the developer layer. A voltage is supplied to the roller to electrostatically move the toner particles from the roller to the latent image, and a voltage is applied to the blade member to inject an electrical charge to the developer layer. When an operation of the device is started, a supply of the voltages to the roller and blade member is carried out after the roller is rotated. When the operation is interrupted or stopped, the supply of the voltage to the blade member is prematurely stopped before the supply of the voltage to the roller and the rotation thereof are stopped.
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Hirose Kazunori
Kera Hiroshi
Nishio Yukio
Tonomoto Yoshihiro
Fujitsu Limited
Grimley A. T.
Smith Matthew S.
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