Patents by Inventor Malcolm R. Mackinnon

Malcolm R. Mackinnon 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).

  • Corrugated thermoplastic blank for a container
    Patent number: 5597111
    Abstract: This invention relates to a corrugated thermoplastic blank for a container. The blank (20) has a base panel (24) with wall panels (26, 28, 30, 32) connected to the base panel (24) by fold lines (38). The fold lines (38) comprise weld lines which destroy the original memory of the thermoplastic material. The free edges of the blank are sealed by seals (38) which prevent water from entering the blank. The sealed free edges and/or the weld lines or line (38) surround and reinforce each panel (26, 28, 30, 32) and increase the strength of each panel and thereby the strength of a container erected from the blank.
    Type: Grant
    Filed: May 20, 1995
    Date of Patent: January 28, 1997
    Assignee: Korpak Limited
    Inventors: Malcolm R. Mackinnon, Ronald Grobler