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:
Nov. 12, 1991
Filed:
Feb. 08, 1990
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
In a method of developing a electrostatic charge pattern in which a magnetic brush is formed by supplying a developer consisting of a magnetic carrier and a magnetic toner onto a non-magnetic sleeve disposed so as to face an image carrier surface and incorporating a magnetic field producing member, the magnetic toner contains 25 to 60% by weight of a magnetic powder and the coercive force of the magnetic toner is not greater than 60 Oe. Preferably, the coercive force of the magnetic toner is not smaller than 15 Oe. The magnetic toner is composed, of, for example, styrene.sub.n -butylacrylate copolymer, magnetite and a charge control agent.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile