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, 1984
Filed:
Jun. 10, 1981
Applicant:
Inventors:
Assignee:
Fuji Xerox Co., Ltd., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346154 ; 346160 ; 358298 ;
Abstract
A multilevel image printing device in which a laser beam is scanned onto the surface of a photoconductive drum with plural intensity levels without the use of a modulator. A multilevel image outputting circuit produces a multilevel signal which is applied to a multilevel image signal to laser beam conversion circuit which converts it into an intensity value for operating a semiconductor laser beam source. The multilevel image signal to laser beam conversion circuit includes plural switches which are operated in response to the multilevel image signal coupled through resistors of different values which determine the voltage applied to the semiconductor laser beam source.