Patents by Inventor Krzystjan P. Sladowski

Krzystjan P. Sladowski 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).

  • Hang bags having hanger portion of reinforcing member of non-shrink film laminated between two layers of shrink film
    Patent number: 4764028
    Abstract: A hang bag comprises a body portion 1 and a hanger portion 2. The body portion 1 is formed of face and rear panels 3 and 4 of shrinkable film sealingly joined together at the end 6, for instance by folding. It may be a double-side weld bag. The hanger portion 2 comprises (a) face and rear layers 10 and 11 of heat shrinkable film laminated or otherwise securely extending from, respectively, the face and rear panels 3 and 4 and (b) non-shrink film reinforcing material laminated between the layers 10 and 11, and the hanger portion (2) is provided, or capable of being provided, with a perforation 13 by which the bag may be hung from a peg. Generally all laminated surfaces are corona treated in order to improve lamination.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: August 16, 1988
    Assignee: W. R. Grace & Co.
    Inventors: John C. Wood, Krzystjan P. Sladowski