G - Physics – 03 – B
Patent
G - Physics
03
B
314/27, 95/33
G03B 27/32 (2006.01) G03B 27/72 (2006.01) G03G 15/041 (2006.01)
Patent
CA 1106671
ABSTRACT OF THE DISCLOSURE An aperture-controlling device in a variable- scale photocopying machine having an optical system unit which is movable to vary the scale of the photo- copy relative to the original comprises an aperture- adjusting member for adjusting the width of an ex- posure light beam projected on a photosensitive drum, a tensioned, flexible cord connected at one end to the aperture-adjusting member, and a member following movements of the optical system unit to displace the cord at a point thereof substantially perpendicularly to its longitudinal direction thereby to actuate the aperture-adjusting member and adjust the exposure light beam width. The other end of the cord is connect- ed to an exposure member which is adjustably movable to move the cord in forward and return movements sub- stantially in the longitudinal direction thereof thereby to adjust the exposure light beam width in- dependently of the adjustment thereof due to scale- varying movement of the optical system unit.
330429
Borden Ladner Gervais Llp
Ricoh Co. Ltd.
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