Multiple range variable magnification reproduction machine using

Details Multiple range variable magnification reproduction machine using Multiple range variable magnification reproduction machine using

1976-05-03

1977-06-28

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

G03B 2754

Patent

active

040322319

ABSTRACT:
A document reproduction machine having a multiple range of magnifications employs a scanning optical system which is controlled as to scanning speed and distance of travel by the selected magnification using a three-dimensional cam mechanism. In the higher reduction copying ranges the speed of the scanning optical system is automatically increased in proportion to the selected magnification reduction, and the increase in scanning distance is tailored to match expected document size to achieve a minimum amount of scanning distance.

REFERENCES:
patent: 3542467 (1970-11-01), Ferguson et al.
patent: 3614222 (1971-10-01), Post et al.
patent: 3687544 (1972-08-01), Muller
patent: 3778147 (1973-12-01), Reehil et al.
patent: 3884574 (1975-05-01), Dol et al.
patent: 3897148 (1975-07-01), Ritchie et al.
patent: 3963343 (1976-06-01), DE Keyzer

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