Heater device for heating portions of shoe uppers

Abstract From the Canadian patent

A clamp-type heater for heating shoe upper portions prior to molding them comprises an inner metal form and a cooperating outer band of silicone rubber material. The form is heated e.g. by a cartridge heater while the band is heated by a radiant heater arranged about its outer surface. When the inner form carries a shoe upper portion into the band, the 1atter wraps around the portion and clamps it about the form to ensure efficient heat transfer. The temperature of the outer band is sensed by a thermistor which is accommodated in a tube secured by adhesive to the outer surface of the outer band. More particularly the tube, is secured to the band by a line contact and its longitudinal axis …