Photocopying – Contact printing – Light boxes
Patent
1989-05-24
1990-12-11
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118653, 310198, 318685, 355208, 355246, G03G 1506
Patent
active
049774280
ABSTRACT:
In an image-forming apparatus (1), such as an electro-graphic printer, in which an electro-static latent image formed on an photoconductive drum (5) is reproduced by a toner (15), having a pulse motor (M) for driving an agitator (13) built-in to a developer unit (8), the agitator (13) is controlled during an initialization process of the apparatus (1) by setting the rotational speed of the motor (M) at a lower level (P) upon a start-up thereof, and converting the same to a higher level (N) corresponding to the normal operational speed after a predetermined period (T1) has passed from the start-up, whereby a larger torque is generated from the motor (M) at the start-up stage of the initialization so that the agitator (13) can be smoothly rotated even if the toner (15) has solidified in the developer unit (8).
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patent: 4839691 (1989-06-01), Tagawa et al.
Hayashida Nobuyuki
Sakakura Shigeki
Dang Thu A.
Fujitsu Limited
Grimley A. T.
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