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. 28, 1989
Filed:
Jun. 29, 1987
Applicant:
Inventor:
Yoshifumi Homma, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355-8 ; 355 / ; 346 / ;
Abstract
A laser beam printer, in which a laser beam outputted by a laser diode pulse-modulated and controlled is deviated to be swept by means of a polygon mirror and folded by a reflecting mirror, after having passed through an F.theta. lens including two single lenses, so that it traverses the space between the two single lenses and reaches a light sensitive drum in order to expose it thereto.