Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1979-01-22
1981-04-07
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
355 64, G03B 1500, G03B 2732
Patent
active
042602459
ABSTRACT:
Apparatus for exposing a gray sample onto the unexposed perforated marginal portion of a web of photographic film has a drum over which the web is trained while moving lengthwise, and a device which monitors the web and generates a signal on detection of successive or selected perforations. Such signals are delayed for an interval of time which insures that a field which is to be provided with a test exposure and is located at a predetermined distance from the perforation which has caused the generation of a signal is located in the range of an imaging system operating with a flash unit to expose the sample onto the aforementioned field. The delay can be effected by a computer which receives the aforementioned signals and which further receives signals denoting incremental advances of the web through distances of selected unit length. The test exposures are used in the copying machine for comparison with a color chart to insure proper selection of intervals during which the film frames are exposed to light of various colors.
REFERENCES:
patent: 1431893 (1922-10-01), Jones
patent: 2753757 (1956-07-01), Roth
patent: 3354777 (1967-11-01), Normandy et al.
patent: 3645619 (1972-02-01), Burton et al.
patent: 3718074 (1973-02-01), Davis
patent: 3898002 (1975-08-01), Kinder et al.
patent: 4079388 (1978-03-01), Takahama et al.
patent: 4089018 (1978-05-01), Asano
Agfa-Gevaert Aktiengesellschaft
Griffin Donald A.
Kontler Peter K.
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