Clamp type heater for back-part molding shoe machines

Details Clamp type heater for back-part molding shoe machines Clamp type heater for back-part molding shoe machines

A - Human Necessities

43

D

12/81

A43D 11/12 (2006.01)

Patent

CA 1110020

16 ABSTRACT OF THE INVENTION A clamp heater for heating shoe upper portions prior to molding them comprises an inner metal form and a cooperating outer band constructed of silicone rubber. The inner metal form has a cartridge heater accommodated therein. The outer band is heated by a radiant heater arranged about its outer surface. When the inner form carries a shoe upper portion into the outer band, the outer band wraps around the shoe upper portion and clamps it about the inner form, to emsure efficient heat transfer. To protect the outer band from heat damage, a temperature control device in the form of a thermostat is provided. The inner form also has a temperature control device therein. To ensure adequate heat is available in the operation of the clamp, when the inner form is moved to carry the shoe upper portion into the outer band, the temperature controls are both overridden and the heaters are rendered operative.

336041

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