Heat device for heating portions of shoe uppers

Details Heat device for heating portions of shoe uppers Heat device for heating portions of shoe uppers

1982-08-30

1985-04-02

Schroeder, Werner H.

Electric heating

Heating devices

Combined with diverse-type art device

12 541, A43D 2520, H05B 102

Patent

active

045089566

ABSTRACT:
A clamp-type heater for heating shoe upper portions prior to molding them comprises an inner metal form (18) and a co-operating outer band (26) of silicone rubber material. The form (18) is heated e.g. by a cartridge heater while the band (26) is heated by a radiant heater (36) arranged about its outer surface. When the inner form (18) carries a shoe upper portion into the band (26), the latter wraps round the portion and clamps it about the form to ensure efficient heat transfer. The temperature of the outer band (26) is sensed by a thermistor (46) which is accommodated in a tube (48) secured by adhesive to the outer surface of the outer band. More particularly, the tube (48) is secured to the band (26) by a line contact and its longitudinal axis extends perpendicular to the direction in which the band is stretched during the operation of the device. The thermistor (46) co-operates with an electronic controller (56) to maintain the band at the control temperature set, without any wide fluctuations which are characteristic of e.g. thermostatic control means. The tube (48) is of a silicone rubber material having similar heat-conductive properties to those of the band (26).

REFERENCES:
patent: 3418449 (1968-12-01), Cleversly
patent: 4284874 (1981-08-01), Prichard

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