Microfilm reader-printer

Details Microfilm reader-printer Microfilm reader-printer

1990-12-18

1991-11-12

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

G03B 1328

Patent

active

050651790

ABSTRACT:
A microfilm reader-printer having a reader mode for projecting an image of a microfilm onto a screen and a printer mode for printing the image on a copy paper. The screen is provided with indexes indicative of a plurality of sizes of a copy paper. For a copy paper of a size larger than a certain size, the index indicates a smaller size than the size of the copy paper. A lens of variable magnification type is used so that the magnification of the projection lens for the reader mode is made smaller than the magnification for printer mode when a copy paper of a size larger than the certain size is selected. The magnifications for the reader mode and printer mode are made equal to each other when a copy paper of a size smaller than or equal to the certain size is selected.

REFERENCES:
patent: 3733128 (1973-05-01), Naumann et al.
patent: 4278346 (1981-07-01), Toriumi et al.
patent: 4603966 (1986-08-01), Brownstein
patent: 4825243 (1989-04-01), Ito et al.
patent: 4873552 (1989-10-01), Otsuki
patent: 4958186 (1990-09-01), Sashida
patent: 4989033 (1991-01-01), Yamashita
U.S. patent application Ser. No. 542,268 (filed Jun. 22, 1990) (Pending).

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