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. 19, 1996
Filed:
Jul. 13, 1995
Yoshinobu Baba, Yokohama, JP;
Takeshi Ikeda, Yokohama, JP;
Yasuko Amano, Ebina, JP;
Hitoshi Itabashi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 30 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, a magnetization (residual magnetization .sigma..sub.r) of at least 25 emu/cm.sup.3 under a magnetic field strength of zero oersted, a coercive force of less than 300 oersted, and a relationship of: