The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 1991
Filed:
Oct. 02, 1990
Applicant:
Inventor:
Jean Burtin, Mol, BE;
Assignee:
AGFA-Gevaert, N.V., Mortsel, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
355 69 ; 355 83 ;
Abstract
A photographic exposure apparatus includes a lamp housing for a metal-halide discharge lamp for exposing a light-sensitive film to an image-bearing sheet when the lamp is energized to full power, a shutter for closing the lamp housing while the lamp remains energized at a lower power level in stand-by condition, and a control unit for energizing of the lamp in standby condition in such a way that, while being maintained at reduced power, the lamp is intermittently energized at high power during short intervals, e.g. in pulses, to thereby substantially prolong the working life of the lamp.