Document size reading device for continuously variable magnifica

Details Document size reading device for continuously variable magnifica Document size reading device for continuously variable magnifica

1984-09-27

1986-05-13

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 61, G03B 2734, G03B 2740, G03B 2770

Patent

active

045882894

ABSTRACT:
An original's size reading device for use in a continuously variable magnification type copying machine which automatically reads the size of an original placed on an original platen so that it is unnecessary to perform manual operations or calculations to adjust the magnification setting or copy size. A first mirror receiving a light beam from the original is provided below the stationary original platen with the first mirror being movable parallel to the platen. A light beam reflected from the first mirror is applied through a second mirror and a magnification varying optical system to the photosensitive element of the copying machine. The original's size reading device employed in this copying machine includes an original's edge detector for detecting the size of the original in association with the movement of a moving unit on which the first mirror is fixedly installed.

REFERENCES:
patent: 4338020 (1982-07-01), Yukawa et al.

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