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. 30, 1995
Filed:
Jun. 28, 1993
Bruce E Hyllberg, Gurnee, IL (US);
Robert G Langley, Burlington, WI (US);
American Roller Company, Bannockburn, IL (US);
Abstract
A thermal conductive roller for use in copying machines, steam-heated and induction-heated applications includes a ceramic heating layer formed by plasma spraying a ceramic material. Conductive bands are provided for supplying electrical current to portions of the ceramic heating layer. In one embodiment, heat is generated by passing current through a length of the roller between two narrow bands. In a second embodiment, heat is generated by directing current radially from the core of the roller to an outer ground layer through wide bands corresponding to heating zones for the roller. In a third embodiment, the ceramic layer is inside the steel core.