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:
Jan. 30, 1990
Filed:
Sep. 30, 1988
Kanji Tokuda, Kanagawa, JP;
Osamu Fukushima, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A photographic printing apparatus is provided with at least two illumination lamps selectively placed in a printing path for printing an image of an original on a photographic material and a lamp detector for detecting which illumination lamp is in the printing path, and then sending a signal to a controller. The controller excites the lamp detected in the printing path and designates a data channel of a memory corresponding to the detected lamp in order to read out lamp data such as a lamp slope coefficient and lamp balance therefrom and then determine an exposure time. The lamp detector effects the detection of the lamp and generates a signal when the lamp in use is broken and is replaced with a spare.