Clamp type heater for back-part molding shoe machines
Patent 4284874 Issued on August 18, 1981. Estimated Expiration Date: 
September 17, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 17, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2694131 3517160 Method of using a temperature controller for a fixing device of a copying machine Patent #: 4140894 InventorsAssigneeApplicationNo. 06/075905 filed on 09/17/1979US Classes:219/215, Shoe machinery219/251, Thermally responsive219/509, Automatically operated392/418, With support for workpiece392/422With reflectorExaminersPrimary: Grimley, Arthur T.Assistant: Roskoski, Bernard Attorney, Agent or FirmInternational ClassesA43D 11/00 (20060101)A43D 11/12 (20060101) Foreign Application Priority Data1978-10-05 GBAbstractA 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 ensure 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.Field of SearchShoe machineryAutomatically operated With power supply, voltage or current-control means Thermally responsive Adjustable Comprising fusible metal, expansible liquid, or bar means With electrical circuit completion or terminal structure Automatically operated Combined with pressure application means | |
