Patents by Inventor Karl-Heinz Hofrichter

Karl-Heinz Hofrichter 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).

  • Patent number: 6286680
    Abstract: A pack of bags and a method for producing the bags made of thermoplastic foil, wherein the bags are interlocked into a pack at least in an area of an edge strip and have a perforated tear-off line formed below the interlocked area for separating the bags from the interlocked edge strip. A bag bottom is formed by a weld seam in the area opposite the edge strip wherein, for the purpose of reducing the bag width, each bag of a pack is folded around folding edges extending in a longitudinal extension of the bag and in the folded position is interlocked in an edge area with the pack. The tear line of the folded bags stamped into the pack of bags is designed in a form of sickle-shaped incisions, wherein the sickle-shaped incisions extend as far as the longitudinal sides of the pack of bags and are cut through the bags, so that the folded bags are separated at their outer lateral edges from the interlocked edge strip and connecting strips are formed between the sickle-shaped incisions.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: September 11, 2001
    Inventor: Karl-Heinz Hofrichter