Variable magnification copying apparatus

Details Variable magnification copying apparatus Variable magnification copying apparatus

1977-12-09

1979-09-25

Hix, L. T.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 8, G03B 2770, G03B 1528

Patent

active

041689054

ABSTRACT:
This specification discloses a copying apparatus in which a first and a second reflector are movable at a velocity ratio of 1:1/2 to scan an image original and the first reflector is displaced by magnification change operation. A movable pulley is provided to a support member for the second reflector. A wire having one end secured in place within the apparatus is passed over the movable pulley and the other end portion thereof is wound on a drive pulley. A support member for the first reflector is secured to the wire between the movable pulley and the drive pulley. The wire is passed over a first pulley displaceable by magnification change operation, between that end of the wire secured in place and the securing point of the wire to the first reflector supporting member. The wire is also passed over a second pulley displaceable by magnification change operation, between the securing point of the wire to the first reflector supporting member and the drive pulley. The first and second pulleys are integrally displaceable.

REFERENCES:
patent: 3614222 (1971-10-01), Post et al.
patent: 3884574 (1975-05-01), Doi et al.
patent: 3914044 (1975-10-01), Ogawa
patent: 3918806 (1975-11-01), Cook
patent: 3990792 (1976-11-01), Kono et al.
patent: 4073584 (1978-02-01), Kitajima

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