Patents by Inventor Frank W. Delfer

Frank W. Delfer 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).

  • Apparatus for producing hollow plastic articles
    Patent number: 4721452
    Abstract: The apparatus includes a carrier plate cooperating with an injection molding machine and having at least two sets of cavities therein for cooling the hollow plastic articles, with the number of cavities corresponding to a multiple of at least two times the number of hollow plastic articles produced in an injection molding cycle. The apparatus also includes means for aligning one set at a time of said carrier plate cavities to juxtapose said set of cavities with the hollow plastic articles formed in an injection molding cycle, and means for transferring said hollow plastic articles to said juxtaposed cavities.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: January 26, 1988
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Frank W. Delfer, III