EP 0320862 A2 19890621 - Positive temperature coefficient thermistor heating pad.
Title (en)
Positive temperature coefficient thermistor heating pad.
Title (de)
Thermistorheizeinheit mit positivem Temperaturkoeffizienten.
Title (fr)
Support pour thermistance chauffante àcoéfficient de température positif.
Publication
Application
Priority
US 13247987 A 19871214
Abstract (en)
A heating pad using positive temperature coefficient thermistors as a primary heat source with the thermistors being electrically and mechanically connected to electrically conductive sheets, preferably woven, with dielectric material preferably separating the conductive sheets. A covering of dielectric material preferably is used to electrically separate the heating pad from the environment. The heating pad construction uses the conductive sheets as the primary heat transfer means from the thermistors, resulting in a relatively even heat distribution over the heating pad. The heating pad is preferably made of materials that are flexible so as to enable the pad to flex to adapt to items of different shapes to be heated by the pad.
IPC 1-7
IPC 8 full level
H05B 3/00 (2006.01); H05B 3/14 (2006.01); H05B 3/34 (2006.01); H05B 3/84 (2006.01)
CPC (source: EP)
H05B 3/141 (2013.01); H05B 3/34 (2013.01); H05B 2203/005 (2013.01); H05B 2203/009 (2013.01); H05B 2203/013 (2013.01); H05B 2203/017 (2013.01); H05B 2203/02 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0320862 A2 19890621; EP 0320862 A3 19900613; EP 0320862 B1 19950215; AT E118664 T1 19950315; AU 2680988 A 19890615; AU 611237 B2 19910606; CA 1298338 C 19920331; DE 3853056 D1 19950323; DE 3853056 T2 19950727; IN 171935 B 19930213; JP H025390 A 19900110; MX 170020 B 19930804
DOCDB simple family (application)
EP 88120760 A 19881213; AT 88120760 T 19881213; AU 2680988 A 19881213; CA 585815 A 19881213; DE 3853056 T 19881213; IN 6MA1989 A 19890103; JP 31307488 A 19881213; MX 1414788 A 19881213