Patents by Inventor Bruce R. MacDonald

Bruce R. MacDonald 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).

  • Press apparatus with dynamic counterbalance and feed mechanism
    Patent number: 6082255
    Abstract: A form, loop and trim system is provided with a toggle mechanism for dynamic counterbalancing. The system operates at high speed with reduced vibration. The system may be conveniently adjusted to handle products of different sizes, shapes and materials. An improved feed apparatus for indexing a sheet of thermoformed articles is also disclosed.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: July 4, 2000
    Assignee: Sencorp Systems, Inc.
    Inventors: Peter H. Gundal, Bruce R. MacDonald