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. 23, 1993
Filed:
Sep. 17, 1990
Masaaki Ishikawa, Hino, JP;
Michihisa Iguchi, Hachioji, JP;
Hiroshi Hashizume, Hino, JP;
Yasuo Fujii, Hachioji, JP;
Tetsuya Nakamura, Hino, JP;
Hirotaka Fukuyama, Hino, JP;
Seiji Arai, Hachioji, JP;
Koichiro Sato, Hino, JP;
Toshio Takagi, Higashihiroshima, JP;
Shuji Nishina, Kofu, JP;
Jiro Hukasawa, Shirane, JP;
Masatoshi Maruta, Yamanashi, JP;
Seiichi Koizumi, Yamanashi, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Shindengen Electric Manufacturing Co., Ltd., Tokyo, JP;
Yamanashi Electronics Co., Ltd., Yamanashi, JP;
Abstract
A developing apparatus including a hopper storing toner and carrier and a roller disposed in an opening of the hopper. A carrier stopper is provided on a front wall of the hopper proximate the opening having an arced surface concentrically opposing an upper portion of the roller. Thus, a blend layer volume is formed in a first space between the carrier stopper and the roller for storing a blended layer of carrier and toner such that the carrier stopper prevents carrier from scattering outside the blend layer volume and the conjunctional effect of rotating the roller and of the magnetic force of the rotary magnets in the roller blends the carrier and toner stored in the blended layer. A sub-hopper, proximate the blend layer volume, is also formed by a second space between the carrier stopper and a lateral bottom wall of the hopper for storing toner to be provided to the blended layer.