Patents by Inventor Douglas F. Koch

Douglas F. Koch 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).

  • Self-opening can lid with improved contour of score and means for making
    Patent number: 5219257
    Abstract: An easy-open container end includes a displacable panel defined by a score line having curved tails which is in parallel relationship with adjacent means for reinforcing, thereby reducing opening failures, while controlling tearing. A score die and anvil is further provided wherein a four bolt pattern provides greater resistance to distortion and more even mounting stress distribution, resulting in more even score line residuals and reduced opening failures.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: June 15, 1993
    Assignee: Koch Systems Incorporated
    Inventor: Douglas F. Koch
  • Self-opening can lid with improved contour of score
    Patent number: 5064087
    Abstract: An easy-open container end includes a displaceable panel defined by a score line having curved tails which is in parallel relationship with adjacent means for reinforcing, thereby reducing opening failures, while controlling tearing. A score die and anvil is further provided wherein a four bolt pattern provides greater resistance to distortion and more even mounting stress distribution, resulting in more even score line residuals and reduced opening failures.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: November 12, 1991
    Assignee: Koch Systems Incorporated
    Inventor: Douglas F. Koch