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:
Feb. 12, 1980
Filed:
Sep. 15, 1978
Roger L Marvin, Wichita, KS (US);
Kreonite, Inc., Wichita, KS (US);
Abstract
An additive tri-color lamp house having three lamps for conveying filtered light into a mixing chamber and illuminating a photographic image contained on a photographic film. The illuminated image is then projected onto a photosensitive paper for the purpose of making photographic prints and copies. The lamp house is characterized by having a combination of additive primary color filters and subtractive primary color filters positioned in front of the lamps and the amount of each additive primary color (i.e. red, green and blue) conveyed through the filters is controlled. By the proper positioning of the color filters in front of the lamps, the time required for proper exposure of the three separate emulsion layers on conventional color print paper is approximately equal.