Patents Assigned to Katana Corporation
  • Method for forming angular seals in side-gussetted bags
    Patent number: 4986804
    Abstract: Seals are formed in bags made from a flexible web. The sealing element is a heated wire. The thermal conductivity of the wire is selected in reference to the melt and tack characteristics of the film being sealed such that when the film is placed in heat-exchange relationship with the wire, the film is sealed. Further, at least a portion of the film travels on the sealing element. The resistance across the sealing element remains constant during sealing and while the web travels sequentially.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: January 22, 1991
    Assignee: Katana Corporation
    Inventor: Harold A. Jensen
  • Apparatus for the manufacture of block-sealed side-gussetted bags
    Patent number: 4946431
    Abstract: A method for making block of side-gussetted, bottom-weld bags. Each bag has an opening on one side to fascilitate the removal of individual bags from the block.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: August 7, 1990
    Assignee: Katana Corporation
    Inventor: Harold A. Jensen