Method and apparatus for detecting a width of a printing medium

Details Method and apparatus for detecting a width of a printing medium Method and apparatus for detecting a width of a printing medium

1995-12-18

1997-08-26

Moses, R. L.

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

25055924, G03G 1500

Patent

active

056615507

ABSTRACT:
A printing medium width detecting device an image forming apparatus, which has a plurality of sensors for detecting the width of the printing medium at a manual printing medium feeding unit. Unnecessary exposure, developing and transfer can be avoided outside a region where the printing is required by controlling exposure in accordance with the sensed width, thereby reducing toner consumption. The printing medium width detecting device utilizes a plurality of sensors disposed perpendicular to a printing medium feeding direction in the path of manually fed printing medium of an image forming apparatus, for generating a sensing signal recognized by a control unit as the width of the printing medium to control the exposure of a photosensitive drum.

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