Patents by Inventor Friedrich Letschnig

Friedrich Letschnig 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).

  • Device for dosed application of flowable media on a web or cylinder
    Patent number: 4848269
    Abstract: In order to apply a product to a support (10) a transfer cylinder (1) with a checkered surface is used with an applicator cylinder (3). The applicator cylinder (3) consists at least in part of a magnetizable material, is not mounted on an axle, rotates on the transfer cylinder (1) and can move in relation to the point of application.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: July 18, 1989
    Assignee: Johannes Zimmer
    Inventors: Johannes Zimmer, Friedrich Letschnig
  • Device for separating cylindrical screen stencil from an ink tube and washing the stencil
    Patent number: 3987511
    Abstract: A frame has an inclined surface over which slides a carriage having a pair of screen mounting elements for supporting opposite screen ends of a stencil. A washing tube having spray nozzles and a brush is fixedly positioned such that movement of the carriage brings a stencil carried thereby to a position over the washing tube. An ink tube has one end supported by the washing tube and another end supported by the frame, such that movement of the carriage separates the stencil from the ink tube.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: October 26, 1976
    Inventors: Karl Mayer, Friedrich Kampitsch, Helmut Frey, Friedrich Letschnig