Patents Assigned to PNC Corporation
  • Process for producing a balanced nonwoven fibrous network by radial extrusion and fibrillation
    Patent number: 4085175
    Abstract: Self-bonded, balanced nonwoven fibrous fabrics having fibers uniaxially oriented and junction points of biaxially oriented film tissue and fibers in the plane of the fabric, the fibers being primarily oriented in the machine direction with the biaxially oriented film tissue being oriented in the cross direction. The nonwoven fabrics are produced by extruding a molten polymer radially from a circular die, quenching and then drawing the extrudate.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: April 18, 1978
    Assignee: PNC Corporation
    Inventor: Herbert W. Keuchel
  • Fibrillator
    Patent number: 4009812
    Abstract: A mechanical fibrillator for use with a split film tape extrusion system which comprises means for guiding the tape through the fibrillator, rotating cutter means in the fibrillator, means for forcing the tape into contact with the rotating cutter means, and means adjacent the cutter for collecting dust created during fibrillation.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: March 1, 1977
    Assignee: PNC Corporation
    Inventors: Herbert W. Keuchel, George A. Farris