Image mask for microfiche

Details Image mask for microfiche Image mask for microfiche

1986-07-31

1987-08-25

Haroian, Harry N.

Optics: image projectors

Light shield, mask, hood, or diaphragm

353 88, G03B 2114

Patent

active

046889116

ABSTRACT:
An image masking device for a microfilm reader and/or reader-printer is formed to slide longitudinally of a microfiche handler and comprises a thin opaque mask adapted to ride on the film handler adjacent a film to cover the film and define a clear line of demarcation between visible image portions and obscured portions.

REFERENCES:
patent: 3269261 (1966-08-01), Porter
patent: 3342101 (1967-09-01), Zollner
patent: 3531193 (1970-09-01), Diehl
patent: 3661449 (1972-05-01), Wright

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