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:
Apr. 01, 1986
Filed:
Jan. 30, 1984
Toshiyuki Ogawa, Kawasaki, JP;
Ricoh Company, Ltd., , JP;
Abstract
A magnet roll for use in a developing device for developing an electrostatic latent image in an electrophotographic copier is provided. The magnet roll may be rotatably disposed inside of a developing sleeve so that magnetic toner may be transported along the circumference of the sleeve as magnetically attracted to the peripheral surface of the sleeve. The present magnet roll includes an impeller-shaped support and a plurality of magnet members provided as mounted on the support only at desired locations. The magnet member contains a matrix component, such as nitrile-butadiene rubber, and a magnetic component, such as ferrite powder. Therefore, the present magnet roll is light in weight and sturdy in structure.