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:
Nov. 05, 2002
Filed:
Nov. 30, 2001
Applicant:
Inventors:
Toru Kasai, Tokyo, JP;
Shuntaro Kuriyama, Tokyo, JP;
Assignee:
Jamco Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/28 ; H05B 3/32 ; A47J 3/624 ;
U.S. Cl.
CPC ...
H05B 3/28 ; H05B 3/32 ; A47J 3/624 ;
Abstract
A heater unit mounted on a tray utilizes a PTC heater having a positive temperature coefficient (PTC), and a sheet heater superposed thereto. The PTC heater includes PTC members buried within an insulating substrate and on both sides of the PTC members are placed copper foils functioning as electrodes. When the PTC heater is heated up to a preset temperature, the electric resistance of the heater is increased greatly, and the heating is stopped, maintaining the preset temperature. The sheet heater contributes to reduce the time the heater needs to rise to the preset temperature during initial startup.