Patents by Inventor John E. Aldridge

John E. Aldridge has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4465448
    Abstract: A method and apparatus for making shoes of the type comprising an injection molded sole which is bonded to a marginal edge portion of a string lasting preferably made of a thermoplastic material. The lasting is held on a last. A radiant heater is automatically positioned below the lasting to preheat the marginal edge portion of the lasting until it is tacky, at about 150.degree.-200.degree. F., after which the heater is withdrawn and the last and the lasting are positioned at the top of a sole mold. Injection molding apparatus injects a molten thermoplastic sole material, such as polyvinyl chloride, at high temperatures of about 300.degree.-380.degree. F. into a sole cavity formed in the sole mold were the molten material bonds to the marginal edge portion of the lasting to form a completed shoe. The completed shoe is cooled by transferring it from the last which was employed during the molding operation to a cooling last separate from the machine. The completed shoe is rapidly cooled to down below 45.degree.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: August 14, 1984
    Assignee: Norwich Shoe Co., Inc.
    Inventor: John E. Aldridge