Variable magnification and reciprocal exposure copying method

Details Variable magnification and reciprocal exposure copying method Variable magnification and reciprocal exposure copying method

1981-08-19

1983-11-15

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 8, 355 55, 355 60, G03G 1500

Patent

active

044152590

ABSTRACT:
A variable magnification and reciprocal exposure copying method in which the image of an original is introduced onto a photoconductor which is moved in a predetermined direction by reciprocating mirrors relative to the original, so that the photoconductor is exposed to the light image of the original during the forward movement and backward movement, and an auxiliary lens for variable magnification is disposed in such a manner that it can be shifted from or into the optical path in front of or behind an inverted optical system for use in the forward movement or an erecting optical system for use in the backward movement, so that reciprocal, variable magnification copying can be performed. The inverted optical system can be shifted in such a direction as to cross the optical axis thereof, and by the shifting of the inverted optical system, even if a copy sheet smaller than the maximum copying size is used and copying is performed under reciprocal exposure copying or reciprocal magnification copying or both at the same time, images to be copied can be copied within the small copy sheet.

REFERENCES:
patent: 3994580 (1976-11-01), Hoffman
patent: 4116561 (1978-09-01), Knechtel et al.
patent: 4118118 (1978-10-01), Barto
patent: 4139298 (1979-02-01), Tani
patent: 4279497 (1981-07-01), Satomi

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