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:
May. 12, 1981
Filed:
May. 10, 1979
Applicant:
Inventors:
Assignee:
Hitachi Metals, Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
B21B / ; G03G / ;
U.S. Cl.
CPC ...
2911 / ; 118658 ; 355 / ;
Abstract
A core assembly for magnetizing a columnar permanent magnet, especially a columnar ceramic permanent magnet and a developing roll magnetized by the core assembly, adapted for use in an electrostatic developing apparatus of magnetic-brush developing type. The magnetizing iron core assembly has a specific arrangement of magnetic poles and magnetizing coil windings for providing a specific pattern of magnetic flux distribution which would provide the most efficient development.
Harada, Hideki. (1981). Developing roll for use in electrostatic developing apparatus employing (U.S. Patent No. 4266328). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4266328
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile