Patents by Inventor August Liepold

August Liepold 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: 4473198
    Abstract: This invention relates to a spool for video cassettes comprising at least one flange which is raised from or deposited onto the base of the cassette against the force of a spring. The spool has a hollow-cylindrical projection (11) which is open to the outside, in the center of the top of the spool hub, in which projection (11) a spherical body (12) of abrasion-proof plastics material is clamped, for example, polyoxymethylene. The spherical cap protruding from the projection protrudes beyond other pins (10) which are optionally moulded on the surface. The spool itself is made of a different, plastics material of less hardness compared with that of the spherical body.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: September 25, 1984
    Assignee: Agfa-Gevaert AG
    Inventors: Albert Pertzsch, August Liepold, Hubert Brunner
  • Patent number: 4114833
    Abstract: In order to avoid blocking of the tape travel in a compact cassette deriving from loop formation, an oblique rib is provided between tape cavity and idler roller. The rib ends in close vicinity of the side walls of the cassette leaving only a narrow passage between its free end and the side wall for the tape travel.
    Type: Grant
    Filed: April 19, 1977
    Date of Patent: September 19, 1978
    Assignee: AGFA-Gevaert AG
    Inventor: August Liepold