Patents Assigned to Knytex Proform
  • Biased multi-layer structural fabric composites stitched in a vertical direction
    Patent number: 4550045
    Abstract: Non-woven, multi-layer biased structural fabric is disclosed, which is comprised of at least three layers of parallel structural fibers, with no secondary yarns or fibers in the plane of the layers to hold said fibers in parallel relationship. Both the vertical relationship of the layers and the parallelity of the fibers within each layer is maintained by vertical stitching. The fabric may be made into a structural composite by saturation and subsequent curing with a curable, crosslinking resin. An apparatus and method for forming that fabric and composite is also disclosed, which is comprised of aligned weft lay down carriages arranged sequentially and further aligned with a stitching machine. A means for advancing the fibers from each weft lay down carriage into the stitching machine passes along the weft carriages. As each layer is laid down on top of the previous layer, it is engaged by the advancing means and so brought into the stitching machine, where the layers are vertically stitched through.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: October 29, 1985
    Assignee: Knytex Proform
    Inventor: Harold K. Hutson
  • Biased multi-layer structural fabric composites stitched in a vertical direction and process and apparatus for making same
    Patent number: 4484459
    Abstract: Non-woven, multi-layer biased structural fabric is disclosed, which is comprised of at least three layers of parallel structural fibers, with no secondary yarns or fibers in the plane of the layers to hold said fibers in parallel relationship. Both the vertical relationship of the layers and the parallelity of the fibers within each layer is maintained by vertical stitching. The fabric may be made into a structural composite by saturation and subsequent curing with a curable, crosslinking resin. An apparatus and method for forming that fabric and composite is also disclosed, which is comprised of aligned weft lay down carriages arranged sequentially and further aligned with a stitching machine. A means for advancing the fibers from each weft lay down carriage into the stitching machine passes along the weft carriages. As each layer is laid down on top of the previous layer, it is engaged by the advancing means and so brought into the stitching machine, where the layers are vertically stitched through.
    Type: Grant
    Filed: September 28, 1983
    Date of Patent: November 27, 1984
    Assignee: Knytex Proform
    Inventor: Harold K. Hutson