Patents by Inventor Thomas D. Huempfner

Thomas D. Huempfner 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).

  • Stack formed from connected groups of interfolded sheets
    Patent number: 6286712
    Abstract: A stack of interfolded sheets is formed from a plurality of groups of interfolded sheets. Adjacent groups are secured or bonded together so that the bottom sheet of each group pulls the top sheet of the next group. In one embodiment of the invention, the strength of the bond is such that when the bottom sheet of a group is withdrawn through an opening in a package for the stack, the bond releases the top sheet of the next group after the top sheet is partially withdrawn through the opening. In another embodiment of the invention, the strength of the bond is such that the top sheet remains secured to the bottom sheet and is completely withdrawn through the opening. The sheets can be secured by an adhesive bond or by a non-adhesive bond.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: September 11, 2001
    Assignee: Paper Converting Machine Co
    Inventors: Grantland A. Craig, James E. Hertel, Gary E. Johnson, Wayne W. Luebke, Peter A. Heath, Thomas D. Huempfner, John H. Wunderlich