Patents by Inventor David E. Rutherford

David E. Rutherford 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).

  • Patent number: 5505551
    Abstract: A device for separating individual items from a continuous perforated sheet includes a longitudinal burster for separating longitudinal lines of weakening on a perforated sheet, and a transverse burster for separating transverse lines of weakening on a perforated sheet. The longitudinal burster operates by employing a pair of rollers linked to a pulley device, with belts, the belts causing edge strips on a perforated sheet to diverge, and separate, from the perforated sheet, along its longitudinal lines of weakening. The transverse burster separates transverse lines of weakening by causing a perforated sheet tensioned against the surface of the transverse burster to begin to separate, the separation being completed as the perforated sheet continues to move across the transverse burster.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: April 9, 1996
    Inventor: David E. Rutherford