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:
Oct. 06, 1998
Filed:
Jul. 14, 1995
Youji Hirose, Ibaraki, JP;
Yasuyuki Tsuji, Ibaraki, JP;
Shuuho Yokokawa, Ibaraki, JP;
Kunitomo Takahashi, Ibaraki, JP;
Isao Nakajima, Ibaraki, JP;
Muneyoshi Akai, Ibaraki, JP;
Satoshi Aita, Ibaraki, JP;
Sho Sawahata, Ibaraki, JP;
Shigeo Nemoto, Ibaraki, JP;
Yukio Otome, Ibaraki, JP;
Katsuhito Komoda, Ibaraki, JP;
Keiji Kataoka, Ibaraki, JP;
Kazuhiro Akatsu, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
An exposure device of an electrophotographic apparatus which includes a rotary polyhedral mirror for scanning a plurality of laser beams on a photosensitive body, a beam interval adjusting member for adjusting an interval between the laser beams, a rotating mechanism for rotating the beam interval adjusting member, and an optical path position deciding device disposed on the side of the rotary polyhedral mirror in a laser beam advancing direction at the time of adjustment of the laser beam interval, the beam interval adjusting member being rotated so that the optical paths of the laser beams are decided by the optical path position deciding device. The optical path position deciding device may include a plate-like member with boresights or a CCD sensor and a CRT display.