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:
Sep. 22, 1998
Filed:
Dec. 23, 1996
Takeshi Nakagawa, Takatsuki, JP;
Kosaku Mitani, Kaizuka, JP;
Osaka Nishikawa Co., Ltd., Osaka-fu, JP;
Abstract
A heater includes a first heat-generating conductor, a second heat-generating conductor and a shield conductor. The first heat-generating conductor and the second heat-generating conductor are integrally covered with the shield conductor. One end of the first heat-generating conductor and one end of the second heat-generating conductor are electrically connected to each other. When a current is applied from the other end of the first heat-generating conductor, the current flows in the first heat-generating conductor and the second heat-generating conductor in opposite directions. A negative potential -Vn is applied to the shield conductor from a negative potential generating circuit. A positive potential terminal connecting circuit is composed of two diodes. One of the diodes has its anode connected to the positive potential terminal of the negative potential generating circuit and its cathode connected to a first line. The other diode has its anode connected to the positive potential terminal and its cathode connected to a second line. The negative potential terminal of the negative potential generating circuit is connected to the shield conductor of the heater and a shield conductor of a temperature sensor.