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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.:

US 6049687 B1

PDFFull Text
Date of Patent:
Apr. 11, 2000

Filed:

Oct. 28, 1998

Developing apparatus

Applicant:
Inventors:

Masaru Hibino, Minami Ashigara, JP;

Yoshiaki Kobayashi, Numazu, JP;

Masanori Shida, Shizuoka-ken, JP;

Ichiro Ozawa, Susono, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Fitzpatrick, Cella, Harper & Scinto

Primary Examiner:

Matthew S Smith

Assistant Examiner:

Hoang Ngo

Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
399270 ; 430122 ;
Abstract

A developing apparatus has a developer bearing member disposed in opposed relationship with an image bearing member bearing an electrostatic image thereon with a gap of 6.times.10.sup.-4 m or less with respect to the image bearing member, and bearing and conveying a developer thereon. The developer bearing member is moved in a direction opposite to the direction of movement of the image bearing member in the portion opposed to the image bearing member, and the developer has a non-magnetic toner and a carrier of which the magnetization rate in a magnetic field of 1000 gauss is equal to or greater than 30 emu/cm.sup.3 and equal to or less than 200 emu/cm.sup.3 and the specific resistance at electric field intensity of 5.times.10.sup.4 V/m is 10.sup.12 .OMEGA.cm or greater. The developing apparatus further has applying means for applying a bias voltage having a vibration component to the developer bearing member. The bias voltage applied to the developer bearing member and the gap between the image bearing member and the developer carrying member satisfy the following relation:

Find Patent Forward Citations

Hibino, Masaru. (2000). Developing apparatus (U.S. Patent No. 6049687). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6049687

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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