Reader-printer

Details Reader-printer Reader-printer

1999-11-01

1991-11-26

Hix, L. T.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355355, 355 68, 355218, G03B 2758, G03B 1328

Patent

active

050686879

ABSTRACT:
A reader-printer for copying on a recording paper an image recorded in a microfilm is disclosed, which reader-printer is provided with shutter members capable of intercepting the projected light passing through the part of margin bordering the image. The size of the image in the microfilm is memorized in a memory. The size of the image to be copied and the size of the recording paper on which this image is to be formed are compared based on the ratio of magnification of projection of a projection lens to be used for projecting light through the image on a photosensitive member. The shutter members are driven based on a result of the comparison so that, of the path of the projected light directed to the photosensitive member, the part corresponding to the margin is automatically intercepted by the shutter members.

REFERENCES:
patent: 3901593 (1975-08-01), Kogiso et al.
patent: 4239371 (1980-12-01), Igarashi et al.
patent: 4708464 (1987-11-01), Otsuki et al.
patent: 4739368 (1988-04-01), Lachut et al.
patent: 4750021 (1988-06-01), Holroyd et al.

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