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. 15, 2002
Filed:
Dec. 09, 1999
Kiyoshi Kondou, Kanagawa, JP;
Seiichi Inoue, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
There is provided a dustproof structure of an optical box in which intrusion of dust into the optical box can be prevented. Laser beams deflected by a polygon mirror of an optical box are transmitted through an optical system and exit from an opening outside the optical box, and reach a photographic printing paper. In this case, when dust and the like adhere to the polygon mirror or the optical box, the function of such an optical element deteriorates. Therefore, a dustproofing effect is required by the optical box. Accordingly, by supplying air into the optical box using a fan to thereby pressurize an interior of the optical box, the intrusion of dust from outside of the optical box into the optical box can be prevented, thereby making it possible to prevent dust or the like from adhering to the polygon mirror or the optical system.