Patents Assigned to Levi Strauss & Company
  • Patent number: 4968021
    Abstract: An apparatus is disclosed for flipping over flexible and limp planar workpieces such as fabric. The apparatus includes a primary workpiece propeller having a cylindrical means for contacting the workpiece about a central rotating axis. A slot of sufficient size to receive the workpiece is positioned in a vertical orientation beneath the primary propeller. The slot preferably has a flared upper end positioned directly beneath and in contact or near contact with the propeller. The fabric is drawn into the slot by the rotation of the propeller and follows the contour of the flared open end of the slot. The fabric enters into the slot until the trailing edge of the fabric is in contact with the primary propeller. The trailing edge of the fabric is gripped by the propeller and thereby drawn to the opposite side of the flared opening of the slot and is subsequently pulled out of the slot. The fabric has thereby been inverted so that the top of the fabric is now on the bottom.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: November 6, 1990
    Assignee: Levi Strauss & Company
    Inventors: Lawrence Wafford, Richard L. Harrington, Hubert Blessing
  • Patent number: 4143871
    Abstract: Alternate facing plies in a single stack are separated by this apparatus into two separate piles. The apparatus of the invention includes means for differentiating each top layer from the feed stack and means for transporting the differentiated top layers alternately to a first location and to a second location. The differentiating means includes movable, rotating elements for curling back one or more of the edges of the top layer from the edges of the next underlying layer in the stack and thereafter lifting the layer with the curled edges away from the stack.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: March 13, 1979
    Assignee: Levi Strauss & Company
    Inventor: Hubert Blessing
  • Patent number: 4138957
    Abstract: A cutter for severing work pieces chained together and for removing thread in close proximity to the work piece, such as on leading and trailing edges. The cutter of the invention permits close proximity of adjacent work pieces during the process of sewing but is still able to cut and remove free thread without necessitating undue slack as normally required with a shear type cutter (unlike a guillotine type cutter), or similarly can remove trailing thread between the work piece and the sewing machine.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: February 13, 1979
    Assignee: Levi Strauss & Company
    Inventors: Hubert Blessing, Ted M. Ray