Patents by Inventor Richard L. Witcraft

Richard L. Witcraft 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).

  • Braking system for roll-cutting knife
    Patent number: 4103573
    Abstract: In apparatus for converting tape roll stock into narrower roll segments, and which includes a rotatable cutting blade and means for automatically advancing the blade to engage and cut a revolving roll of tape and means for retracting the blade between sequential cutting operations in a repetitive process, a clutch mechanism for locking the blade on its shaft against rotation during initiation of entry of the blade into the roll stock, thereby to avoid adverse effects such as nicking and double cutting due to lateral runout of the cutting blade edge during blade rotation.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: August 1, 1978
    Assignee: Unipat Corporation of America II
    Inventor: Richard L. Witcraft