G - Physics – 03 – B
Patent
G - Physics
03
B
95/31, 95/32
G03B 27/32 (2006.01) G03F 5/00 (2006.01)
Patent
CA 1153234
ABSTRACT OF THE DISCLOSURE A photographic direct-print system for pro- ducing a screened print from a continuous tone nega- tive. Fundamentally, the invention includes an enlar- ger having a main lamp associated therewith for receiv- ing a negative and casting an image thereof upon an easel. Flashlamps are maintained in juxtaposition to the easel for further illuminating the same. A density read-out circuit, comprising a photodiode presenting an output to a digital volt meter, is included for measuring the light intensity of various areas of the image, such read-out determining the lens setting of the enlarger and the intensity of the flashlamps, as regulated by a power phase control circuit. A timer is included for controlling a period of simultaneous energization of the enlarger and flashlamps, the timer being controlled by a clock hav- ing a frequency which is dependent upon the intensity of the main lamp of the enlarger.
370629
Portage Newspaper Supply Company
Ridout & Maybee Llp
LandOfFree
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