Title:
PLANAR HEATING ELEMENT
Document Type and Number:
WIPO Patent Application WO/1998/031196
Kind Code:
A1
Abstract:
A planar heating element in which a plurality of electrode coating members (4) respectively coating electrodes (3) are attached to a planar heating resistor sheet (2) at prescribed intervals. In each electrode coating member (4), at least the vicinity of the electrode (3) is constituted of a PTC layer having a positive temperature coefficient characteristic that the electrical resistance value of the PTC layer increases as the temperature rises. The sheet (2) does not have a positive temperature coefficient characteristic or has a positive temperature coefficient characteristic that the rise magnification of the sheet (2) is smaller than that of the PTC layer or the rise temperature of the sheet (2) is higher than that of the PTC layer at temperatures lower than the temperature at which the PTC layer exhibits the maximum rise magnification.
Inventors:
SHITAMORI EIICHI (JP)
Application Number:
PCT/JP1997/000052
Publication Date:
July 16, 1998
Filing Date:
January 13, 1997
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
SHITAMORI EIICHI (JP)
SHITAMORI EIICHI (JP)
International Classes:
H05B3/12; H05B3/14; H05B3/20; H05B3/24; H05B3/28; (IPC1-7): H05B3/20; H05B3/03; H05B3/14; H05B3/26
Foreign References:
| JPH0353486A | 1991-03-07 | |||
| JPH08106971A | 1996-04-23 | |||
| JPS59203390A | 1984-11-17 | |||
| JPS5437080Y2 | 1979-11-07 |
Attorney, Agent or Firm:
Kinoshita, Jitsuzo (3rd floor 26-13, Ogikubo 5-chom, Suginami-ku Tokyo 167, JP)
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