Variable magnification optical system for use in electrophotogra

Details Variable magnification optical system for use in electrophotogra Variable magnification optical system for use in electrophotogra

1981-02-23

1982-09-28

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 55, G03G 1500

Patent

active

043516068

ABSTRACT:
An electrophotographic printing method and apparatus in which a variable magnification optical system adjusts the size of indicia being reproduced on a copy sheet from a document. The size of the surface area of the copy sheet is compared with the surface area of the document being reproduced to generate a signal indicative of the difference therebetween. Responsive to this signal, the platens supporting the document and a lens are moved in synchronism relative to the photoconductive member to adjust the magnification of the indicia being reproduced.

REFERENCES:
patent: 3944356 (1976-03-01), Hayne
patent: 4211482 (1980-07-01), Arai et al.
patent: 4272187 (1981-06-01), Birdsall et al.
patent: 4277163 (1981-07-01), Ikesue et al.

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