Patents by Inventor Helmut Wleklinski

Helmut Wleklinski 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: 5775501
    Abstract: Daylight loading packaging for photographic paper in the form of rolls comprising lateral, annular flanges and a casing lengthening piece welded to the flanges, which casing lengthening piece is connected at one end to the start of the paper roll and is free at the other end, the flanges presenting a concentric annular hole the edge of which is welded to the edge of the roll tube and which on one side of a paper base has at least one blackened layer forming a light barrier, at least one aluminium layer forming a vapour barrier, at least one layer which increases resistance to puncture, and furthest away from the paper base a layer which permits welding to the casing lengthening piece and the roll tube, and which has on the other side of the paper base a layer of a synthetic polymer applied by extrusion which imparts a tension to the material which prevents an inward collapse of the flange (seen from the roll).
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: July 7, 1998
    Assignee: AFGA-Gevaert Aktiengesellschaft
    Inventors: Helmut Wleklinski, Georg Fryda, Rene Degroeve