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. 07, 1989
Filed:
Oct. 23, 1986
Applicant:
Inventors:
Seiichi Takagi, Yokohama, JP;
Hiroshi Fukumoto, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
4301066 ;
Abstract
A magnetic toner for developing characteristic latent images is disclosed. The magnetic toner has a magnetic material content W (wt. %) of 20-60 wt. %, a saturation magnetization .sigma..sub.s of W emu/g or higher as measured at a magnetic field of 10 k Oe, and a bulk resistivity of 10.sup.13 .OMEGA..cm or higher. Because of the combination of a high .sigma..sub.s and a high resistivity, the magnetic toner has good image forming characteristics including image density, reproducibility of thin lines and transferability under various environmental conditions and for a long period of image formation.