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. 27, 1981
Filed:
Jun. 23, 1980
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
427 141 ; 118648 ; 118653 ; 118661 ; 430103 ; 430120 ;
Abstract
In an electrostatic apparatus using a toner layer carried by a developing roller for developing a latent image, a doctor blade applied with a voltage of the same polarity as that of the toner is used for partly scraping the toner layer. The toner scraped off is sucked by a suction means. An additional doctor blade is preferably used together with the main doctor blade to make rough and fine control of the thickness of the toner layer.