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:
Sep. 29, 1981
Filed:
Dec. 19, 1978
Applicant:
Inventors:
Yuochi Kobayashi, Yokohama, JP;
Shinichi Kamiyama, Kawasaki, JP;
Assignee:
Ricoh Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B05C / ; G03G / ;
U.S. Cl.
CPC ...
118669 ; 118647 ; 118672 ; 355 10 ;
Abstract
An apparatus for the development of an electrostatic latent image in a magnification-variable copier which is capable of preventing the development of black frames on the outer circumference of copying portion when the reproduction is to be performed on a reduced scale. For this purpose, the apparatus includes a developing electrode which is divided into a plurality of units, such that a proper biasing potential is applied to the copying portion, and a high biasing potential is applied to other portions, whereby the developing is not effected for the unnecessary portions.