Patents by Inventor Jack Doleman

Jack Doleman 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: 3945781
    Abstract: Continuous production of a molded three-dimensional product employs an indexing rotatable drum having along its periphery a plurality of mold cavities into which molten thermoplastic material is introduced, and a web of material permeable to the molten thermoplastic material and which is guided along the drum periphery. In one embodiment the thermoplastic material enters the cavities through the web to which the thermoplastic is subsequently bonded. The thermoplastic material in the cavities is then shaped and cooled before it is removed from the cavities by dissociating the web from the drum periphery. In a second embodiment the molten thermoplastic material is introduced into the cavities before the web is associated onto the drum periphery. After cooling the thermoplastic to bond it to the web, the web is dissociated from the drum and removes the molded thermoplastic from the cavities.
    Type: Grant
    Filed: December 21, 1972
    Date of Patent: March 23, 1976
    Inventor: Jack Doleman