Multiple reduction indicators for continuously variable reductio

Details Multiple reduction indicators for continuously variable reductio Multiple reduction indicators for continuously variable reductio

1976-12-09

1978-08-08

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 61, 355 75, G03B 2736, G03B 2738

Patent

active

041053273

ABSTRACT:
A continuously variable reduction optical system for document copiers wherein a plurality of sets of reduction indicators are provided, each set corresponding to a particular size copy paper. Each set of indicators can be moved by the operator to frame the document to be copied and simultaneously the reduction optical system is set to provide proper adjustment for all system parameters. The indicators are continuously viewable by the operator. An embodiment is disclosed wherein each indicator is positioned so that reduction ratio is maintained whatever the copy paper size.

REFERENCES:
patent: 2256397 (1941-09-01), Luboshez
patent: 2927503 (1960-03-01), Zollinger
patent: 3288022 (1966-11-01), Swanson
patent: 3897148 (1975-07-01), Ritchie et al.

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