Photographic printing and print identifying apparatus

Details Photographic printing and print identifying apparatus Photographic printing and print identifying apparatus

1978-05-12

1980-03-18

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

354105, G03B 2752, G03B 1724

Patent

active

041936841

ABSTRACT:
Photographic negatives or prints marked for identification purposes by exposure of the photographic record medium to a light image at a desired location by use of a contact printer having an opaque housing within which light is produced for a timed interval and projected through spaced diffuser elements, a masking element and an exposure window of the housing to form the light image.

REFERENCES:
patent: 1238504 (1917-08-01), Gaisman
patent: 1622925 (1927-03-01), Ross
patent: 1897908 (1933-02-01), Leavitt
patent: 1974174 (1934-09-01), Chamberlain
patent: 2127601 (1938-08-01), Jaffe
patent: 2188843 (1940-01-01), Pappajion
patent: 3356000 (1967-12-01), Marion

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