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:
Jul. 07, 1992
Filed:
Dec. 18, 1989
Applicant:
Inventors:
Mitsuo Hayashi, Hamura, JP;
Noriki Ono, Higashiyamato, JP;
Takao Yorifuji, Higashiyamato, JP;
Masatoshi Maruyama, Tachikawa, JP;
Assignees:
Casio Computer Co., Ltd., Tokyo, JP;
Casio Electronics Manufacturing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355298 ; 355245 ;
Abstract
A developer circular unit is detachably set in a copier or a copier type printer which print on images on a paper sheet with toner. The unit includes at least a developing device, a cleaner, and a developer conveying device having a pipe communicated with both the cleaner and the developing device and a toner flowing-back preventing mechanism. The action of the mechanism is automatically released by the first set of the unit in the copier or printer and/or the first use of the copier or printer after that first set.