Aperture-controlling device in a variable-scale photocopying...

Details Aperture-controlling device in a variable-scale photocopying... Aperture-controlling device in a variable-scale photocopying...

G - Physics

03

B

95/25

G03B 27/00 (2006.01) G03G 15/04 (2006.01) G03G 15/30 (2006.01)

Patent

CA 1127438

ABSTRACT In a variable-scale photocopying machine having a photosensitive medium, a light source, an optical system for projecting light from the source as an exposure light beam onto the medium, and a scale-varying mechanism, the width of the light beam is adjustable by an adjusting mechanism, which is actuated by a tensioned cord connected thereto when the cord is deflected by an adjusting member in response to movement of the scale-varying mechanism thereby to adjust the quantity of the exposure light to suit each scale of photocopying.

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