Patents by Inventor Erhard E. Loewe

Erhard E. Loewe 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).

  • Lighttight cassette
    Patent number: 5222681
    Abstract: A lighttight cassette for supporting a roll of web material has a housing that includes a variable width dispensing slot formed by two sections of the housing and running substantially parallel to the axis of the supported roll. Both housing sections are positioned with respect to each other under preloaded tension so that the slot assumes its greatest width A. A tensioning device opposes the preloaded tension and is capable of externally adjusting the width of the dispensing slot.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: June 29, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Erhard E. Loewe, Otfried Urban