Photocopying – Contact printing – Light boxes
Patent
1980-09-18
1982-08-17
Griffin, Donald A.
Photocopying
Contact printing
Light boxes
355 40, 355 77, G03B 2752, G03B 2732, G03B 1724
Patent
active
043446833
ABSTRACT:
A test pattern in form of a raster or the like is imaged in a camera onto a margin of a film frame. When the film frame is subsequently converted into a negative which is thereafter printed as a positive, the test pattern is printed in the margin of the photographic image on the positive. Should the image be blurred, it is possible to determine whether the cause of blurring occurred in the camera or during printing, by examining the test pattern which, if blurring occurred in the camera, will be sharp but will itself be blurred if the blurring of the image occurred during printing. The pattern can also be applied to the film frame by the film manufacturer or else in a pre-splicer prior to developing of the exposed film. A method, an apparatus and a pattern carrier are disclosed.
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patent: 2273876 (1942-02-01), Lutz et al.
patent: 3242801 (1966-03-01), Shay et al.
patent: 3618495 (1971-11-01), Kuhns
patent: 3718074 (1973-02-01), Davis
patent: 3736856 (1973-06-01), Grossmann et al.
patent: 4025932 (1977-05-01), Miyagawa
patent: 4123767 (1978-10-01), Halpern
patent: 4183659 (1980-01-01), Brunner
patent: 4211558 (1980-07-01), Oguchi et al.
Agfa-Gevaert Aktiengesellschaft
Griffin Donald A.
Striker Michael J.
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