Patents by Inventor Knud E. Christensen

Knud E. Christensen 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).

  • Heat-shrinkable tubular film material
    Patent number: 5605502
    Abstract: In the manufacture and use of tubular casing material, a starting material having heat-shrinkable properties is partially shrunk to a controlled reduced calibre and then is further shrunk during use. The shrinking may either take place during use, for example by partially shrinking tubular film material over a stuffing horn 2 in a shrinker 6 (FIG. 1) or may be carried out during manufacture by partially shrinking a length of tubular film material to a controlled reduced calibre before sale (FIGS. 2 and 3).
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: February 25, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Knud E. Christensen