Image forming apparatus

Details Image forming apparatus Image forming apparatus

1986-03-21

1987-04-07

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 7, 355 14R, 355 59, G03B 2752

Patent

active

046555854

ABSTRACT:
An image forming apparatus is provided with a pair of pointers for indicating a range for image formation on an original table. The pointers, which are driven by a pulse motor, can move in a direction perpendicular to the moving direction of an optical system for optically scanning the original. A stopper is attached to at least one end portion of a minimum range for image formation indicated by the pointers. The stopper serves to stop the pointer at position indicating the minimum range. In setting the initial positions of the pointers, pulse output means supplies the pulse motor with a necessary number of pulses for the movement of the indicating means from the minimum-range position to the maximum-range position, thereby causing the pointers to move to a position abutting the stopper.

REFERENCES:
patent: 4105327 (1978-08-01), Gibson et al.
patent: 4303332 (1981-12-01), Sakai
patent: 4340295 (1982-07-01), Nakamura
patent: 4371898 (1983-02-01), Nakamura
patent: 4505579 (1985-03-01), Furuichi
patent: 4586808 (1986-05-01), Tanimoto et al.
patent: 4597663 (1986-07-01), Yoshiura et al.

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