Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1982-05-26
1983-12-20
Moses, R. L.
Photocopying
Projection printing and copying cameras
Focus or magnification control
355 8, 355 11, 355 60, G03B 2736
Patent
active
044214057
ABSTRACT:
A multiple mode copying apparatus including a drive for moving a lens in the direction of a principal light beam, a conversion cam for converting the distance covered by the movement of a lens into a rotational angle, and a mirror moving device for moving mirrors in accordance with the rotational angle. The conversion cam is formed with a first cam surface for deciding the distance to be covered by the movement of the mirrors and a second cam surface for following up the distance covered by the movement of the lens. The second cam surface is profiled such that it is in the form of an arc such that when a cam follower moves past a point of contact of the cam follower for effecting copying without magnification and reduction, the direction movement of the cam member is reversed by starting at the point of contact thereof. By selecting a suitable profile for the second cam surface, it is possible to have the first cam surface profiled to be in the form of a straight line.
REFERENCES:
patent: 4077715 (1978-03-01), Greene
patent: 4093374 (1978-06-01), Zucker et al.
patent: 4099866 (1978-07-01), Jones et al.
patent: 4142793 (1979-03-01), Schilling
patent: 4209248 (1980-06-01), Gibson et al.
Moses R. L.
Ricoh & Company, Ltd.
Shoup Guy W.
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