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:
Oct. 02, 1984
Filed:
Dec. 20, 1982
Ricoh Company, Ltd., , JP;
Abstract
A heat-fixing device includes a heat plate along which a transfer medium bearing thereon a toner image is advanced during which the toner image becomes fixed to the transfer medium by fusing, the heat plate including a plurality of heating sections arranged along the direction of advancement of said transfer medium each of the heating sections being provided with at least one electrical heater. The device also includes a control circuit for controlling the operation of the heaters such that, under a non-steady-condition, only selected ones of the heaters are set in operation thereby only the corresponding heating sections are positively heated; whereas, under a steady-state condition, all of the heaters are operated at the same time thereby maintaining all of the heating sections at a predetermined temperature.