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:
Jul. 28, 1998
Filed:
Sep. 22, 1997
Applicant:
Inventors:
Masumi Asanae, Kumagaya, JP;
Masahisa Ochiai, Fukaya, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
4301066 ; 430108 ; 430137 ;
Abstract
A two-component magnetic developer containing a magnetic iron carrier and a non-magnetic or magnetic toner. The magnetic iron carrier is non-spherical in its shape and has an average particle size of 5-100 .mu.m. The non-magnetic or magnetic toner has an average particle size of 2-9 .mu.m and is produced by polymerizing a monomer for a binder resin. The toner concentration in the developer is 2-70 weight % in case of containing the non-magnetic toner and 10-90 weight % for the developer containing the magnetic toner.