Clamp type heater for back-part molding shoe machines

A heater device for heating portions of show uppers prior to molding such portions to a desired shape, the device comprising:

• an inner form and a cooperating outer band;
• a motor means for effecting relative movement between said inner form and said outer band whereby a shoe upper portion placed therebetween can be clamped therebetween;
• a first heating means for heating said inner form and a second heating means for heating said outer band, said second heating means comprising radiant heater means to which the outer surface of the band is exposed, wherein said second heating means is connected to a first circuit, which also incorporates thermostatic control means for limiting the temperature to which said outer band is heated by said second heating means and further to a second circuit, which also incorporates a switch which is operated when the motor means is actuated, the heating device being such that the temperature to which said outer band is heated is controlled by said thermostatic control means when the device is in a rest condition, but said second heating means is rendered operative by said switch when said motor means is activated, regardless of said thermostatic control means;
• and
• wherein said second heating means is accommodated in a chamber which is open at the bottom, through which said band extends thereinto, and further wherein said theremostatic control means is responsive to change in the temperature of the air in the chamber.