EP 1001655 A2 20000517 - Heater with PTC and fixed resistance elements
Title (en)
Heater with PTC and fixed resistance elements
Title (de)
Heizelement versehen mit PTC und feststehenden Widerstandelemente
Title (fr)
Elément de chauffage constitué d'éléments PTC et résistifs fixés
Publication
Application
Priority
US 18938298 A 19981109
Abstract (en)
A heater (10) includes a relatively fixed resistance heating element (14) for providing a greater heating rate at lower ambient temperatures and/or high heat transfer environments. The heater further includes a relatively variable resistance heating PTC (positive temperature coefficient) element (23, 25) which has a resistance which increases in response to increased temperature, thereby providing self-regulation by way of reduced heat at increased temperatures. The relatively fixed (14) and variable resistance heating elements (23, 25) are typically provided on opposite sides of a heating pad (12), but may be separated by a dielectric layer (26) and both formed on a single side of the heating pad (12). <IMAGE>
IPC 1-7
IPC 8 full level
H01C 7/02 (2006.01); H05B 3/00 (2006.01); H05B 3/14 (2006.01); H05B 3/34 (2006.01); H05B 3/84 (2006.01)
CPC (source: EP KR)
H05B 3/00 (2013.01 - KR); H05B 3/14 (2013.01 - EP); H05B 3/146 (2013.01 - EP); H05B 3/34 (2013.01 - EP); H05B 3/845 (2013.01 - EP); H05B 2203/003 (2013.01 - EP); H05B 2203/006 (2013.01 - EP); H05B 2203/011 (2013.01 - EP); H05B 2203/013 (2013.01 - EP); H05B 2203/02 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1001655 A2 20000517; AU 5832199 A 20000525; BR 9907538 A 20000822; CA 2289142 A1 20000509; JP 2000150114 A 20000530; KR 20000035181 A 20000626
DOCDB simple family (application)
EP 99308933 A 19991109; AU 5832199 A 19991105; BR 9907538 A 19991109; CA 2289142 A 19991108; JP 31657699 A 19991108; KR 19990048284 A 19991103