Device for erasing unnecessary images for use in reader-printers

Details Device for erasing unnecessary images for use in reader-printers Device for erasing unnecessary images for use in reader-printers

1986-11-07

1987-11-24

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 7, 355 71, 355 74, G03B 1328

Patent

active

047084642

ABSTRACT:
Disclosed is a reader-printer being capable of erasing a frame surrounding margin of a microfilm and unnecessary image portion in the frame. The reader-printer comprises first flap member, second flap member which are disposed adjacent to a slit and movable in and out of a light path directing toward a photosensitive drum and a lamp to illuminate those flap members when they are moved into the light path. The first flap member is movable in the longitudinal direction along the slit for varying a shading area.

REFERENCES:
patent: 3627411 (1971-12-01), Nagel
patent: 3724940 (1973-04-01), Koizumi
patent: 3792913 (1974-02-01), Simmons
patent: 3807855 (1974-04-01), Zajac
patent: 3827799 (1974-08-01), Koizumi
patent: 3967896 (1976-07-01), Looney et al.
patent: 4023896 (1977-05-01), Koch
patent: 4133609 (1979-01-01), Arai
patent: 4215929 (1980-08-01), Sato et al.
patent: 4256400 (1981-03-01), Komori et al.

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