Patents by Inventor Thomas K. Bunnell

Thomas K. Bunnell 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).

  • Rotary die cutters having magnetically-attracted waste ejector
    Patent number: 4369682
    Abstract: A rotary die cutter comprises a rotary soft anvil coacting with a rotary hard anvil mounting one or more cutting rules, or forms. Each cutting rule has within the area defined by the rule a metal or metal-containing pusher adapted to be moved radially outwardly of the rule at a predetermined location by a magnetic source to eject from the rule any cut waste board contained therein.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: January 25, 1983
    Assignee: Dolan Corrugated Containers Limited
    Inventor: Thomas K. Bunnell