Patents by Inventor Alvin E. Ericson

Alvin E. Ericson 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).

  • Tear resistant separable end-connected bags
    Patent number: 4285681
    Abstract: Continuous strip closed-bottom open-mouthed packaging bags are produced by continually making, at spaced intervals in a continuous flattened tubular oriented plastic film supply, a transversely extending heat seal to define a bag bottom, and, adjacent each heat seal, perforating the two plies of the film supply with a blade heated to effect annealing of the edges of the perforations and having a serrated cutting edge with spaced deep recesses to define connecting tabs between perforations.
    Type: Grant
    Filed: August 29, 1979
    Date of Patent: August 25, 1981
    Assignee: Union Carbide Corporation
    Inventors: Charles R. Walitalo, Alvin E. Ericson
  • Apparatus for making tear resistant separable end-connected bags
    Patent number: 4064776
    Abstract: Continuous strip closed-bottom open-mouthed packaging bags are produced by continually making, at spaced intervals in a continuous flattened tubular oriented plastic film supply, a transversely extending heat seal to define a bag bottom, and, adjacent each heat seal, perforating the two plies of the film supply with a blade heated to effect annealing of the edges of the perforations and having a serrated cutting edge with spaced deep recesses to define connecting tabs between perforations.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: December 27, 1977
    Assignee: Union Carbide Corporation
    Inventors: Charles R. Walitalo, Alvin E. Ericson
  • Apparatus for making reinforced wicket hole directionally tear prone
    Patent number: 4015917
    Abstract: A plastic film packaging bag is fabricated with directionally tear-prone wicket mounting holes having a hole edge reinforcing bead of plastic selectively thinner in the desired tearing direction formed by a hot gas stream directed through shaped templates holding the bag.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: April 5, 1977
    Assignee: Union Carbide Corporation
    Inventor: Alvin E. Ericson
  • Method of perforating thermoplastic film
    Patent number: 3979494
    Abstract: A plastic film packaging bag is fabricated with directionally tear-prone wicket mounting holes having a hole edge reinforcing bead of plastic selectively thinner in the desired tearing direction formed by a hot gas stream directed through shaped templates holding the bag.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: September 7, 1976
    Assignee: Union Carbide Corporation
    Inventor: Alvin E. Ericson