Patents by Inventor John Lindstrom

John Lindstrom 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).

  • Checkweigher having variable weigh platform
    Patent number: 5576520
    Abstract: A method and apparatus is disclosed for use in weighing products having circular or oval footprint configurations. A conveyor having a pair of parallel conveyor elements arranged to underengage the footprint only adjacent the periphery thereof transports the products one at a time across a planar surface of a weigh pan or scale device. The surface of the weigh pan is shaped and the transverse spacing between the conveyor elements is adjustable in order to permit lengths of the surface of the weigh pan engaged by the conveyor elements to be selected to correspond essentially to dimensions of differently sized products to be weighed.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: November 19, 1996
    Assignee: Hi-Speed Checkweigher Co., Inc.
    Inventors: David Waterman, John Lindstrom