EP 0277905 A2 19880810 - Heating method for heating a calender roll.
Title (en)
Heating method for heating a calender roll.
Title (de)
Heizmethode zum Heizen einer Kalanderrolle.
Title (fr)
Méthode de chauffage pour le chauffage d'un rouleau de calandre.
Publication
Application
Priority
US 1035787 A 19870203
Abstract (en)
A heating apparatus (10) is disclosed for heating a calender roll (12). The heating apparatus (10) utilizes heat supplied by induction heating and from a heat transfer medium. The heating apparatus (10) includes heating channels defined by the roll (12). The channels extend through the roll (12) such that the heat transfer medium is permitted to flow through the channels so that heat is transferred from the transfer medium to the roll (12). An induction heater (14) is disposed adjacent to the external surface (24) of the roll (12) and extends along substantially the entire length of the roll (12) such that when the induction heater (14) is energized, heat is induced in the region of the external surface (24) of the roll (12) for supplementing the amount of heat transferred from the heating medium so that the temperature of the external surface (24) of the roll (12) is increased to a level which, in the absence of the induction heater (14), would cause excessive shell stress. Furthermore, the temperature level is attainable without the hazards associated with the use of a heat transfer medium operating at least at such temperature level.
IPC 1-7
IPC 8 full level
D21F 5/02 (2006.01); D21G 1/00 (2006.01); D21G 1/02 (2006.01); H05B 6/14 (2006.01)
CPC (source: EP)
D21F 5/022 (2013.01); D21F 5/024 (2013.01); D21G 1/0266 (2013.01); D21G 1/028 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0277905 A2 19880810; EP 0277905 A3 19890222; EP 0277905 B1 19920325; CA 1290818 C 19911015; DE 3869440 D1 19920430; ES 2030527 T3 19921101; JP H0372758 B2 19911119; JP S63256791 A 19881024
DOCDB simple family (application)
EP 88630014 A 19880201; CA 556941 A 19880120; DE 3869440 T 19880201; ES 88630014 T 19880201; JP 1970588 A 19880201