Magnification varying device for copying machine

Details Magnification varying device for copying machine Magnification varying device for copying machine

1984-08-21

1985-12-10

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 66, G03B 2736, G03B 2738

Patent

active

045575940

ABSTRACT:
A magnification varying device for a copying machine in which a variable magnification zoom lens is arranged between an original surface and a photosensitive surface and the copying magnification is varied by moving the movable lens groups, both with respect to the original and photosensitive surfaces and also with respect to one another. One of the movable lens groups is fixed to a slide plate which is movably supported to be slidable in a direction parallel to the optical axis of the zoom lens. The other lens group is slidable on the slide plate relative to the first lens group. A cam plate having a cam surface is arranged along the line of movement of the slide plate. A cam lever is pivotally mounted on the slide plate and has one arm acting as a cam follower engaged with the cam surface and the other end engaged with a pin coupling it to the second lens group.

REFERENCES:
patent: 4107714 (1978-08-01), Raab
patent: 4397544 (1983-08-01), Yajima et al.

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