Original scanning apparatus and image forming apparatus

Details Original scanning apparatus and image forming apparatus Original scanning apparatus and image forming apparatus

1990-08-22

1992-06-23

Hix, L. T.

Photocopying

Projection printing and copying cameras

Original moves continuously

355 56, G03B 2752, G03B 2750

Patent

active

051247445

ABSTRACT:
An image forming apparatus employs a control means for controlling a driving means such that the current supplied to the driving means is varied between the interval from the end of the acceleration of a scanning means in the advancing direction to the start of the returning of the scanning means and the interval from the start of the returning of the scanning means to the end of the acceleration of the scanning means in the advancing direction. Due to the employment of this control means, a large torque is produced by a moving means for the scanning means during the interval from the start of the returning of the scanning means to the end of the acceleration of the scanning means in the advancing direction. Accordingly, vibrations are suppressed at the end of the returning movement of the scanning means. Since a scan motor is prevented from becoming out of step and since the stator and rotor are prevented from being shifted in position with reference to each other, it is possible to produce an image free from a blur.

REFERENCES:
patent: 3877807 (1975-04-01), Kurita
patent: 4254371 (1981-03-01), Scholten
patent: 4586808 (1986-05-01), Tanimoto et al.
patent: 4748555 (1988-05-01), Miyake et al.
patent: 4870448 (1989-09-01), Miyake et al.

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