Patents by Inventor John T. MacMillan

John T. MacMillan 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 and method for covering primer flash holes
    Patent number: 4383469
    Abstract: Apparatus and method for covering the flash holes in a primer battery cup, particularly where the anvil is formed integrally with the battery cup. Tooling apparatus is provided which includes a spring-loaded punch positioned and slideable axially within an outer punch. A covering medium such as paper is delivered to the tooling station as a strip where it is pierced and slit by the spring-loaded inner punch and blanked by the outer punch. The blanked portion is inserted into the battery cup and seated over the flash holes at the bottom of the cup around the anvil.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: May 17, 1983
    Assignee: Remington Arms Company, Inc.
    Inventor: John T. MacMillan