Patents by Inventor Eugen Zwahlen

Eugen Zwahlen 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: 5850788
    Abstract: A metering strip for an ink fountain of a printing press for metering printing ink, especially a doctor blade, is fastened in a pivoting mount and has a cylindrically shaped edge with a radius in the range between 0.3 and 1.5 mm. The edge is pressed against an inking roller and forms a metering nip with this roller for the printing ink to be metered. Axial recesses merge on both sides of the metering strip with the cylindrically shaped, wear-resistant edge that covers an angular range of more than 180.degree..
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: December 22, 1998
    Assignee: Maschinenfabrik WIFAG
    Inventors: Herbert Janser, Eugen Zwahlen, Peter Gertsch, Robert Imhof
  • Patent number: 4917012
    Abstract: The inking device of a printing machine is composed of an inking roller, providing an elastic surface, the inking roller producing a pre-dosed ink layer on the inking rollers. A dosing strip wipes off the pre-dosed ink layer and leaves the quantity necessary for the transfer onto a stereo cylinder, the wiped off excess ink running off freely. For self-cleaning purposes, the dosing strip carries out a movement preferably in the direction of the circumference of the inking roller, so that the area forming the dosing slot which is in contact with the inking roller is continuously modified.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: April 17, 1990
    Assignee: Maschinenfabrik Wifag
    Inventors: Peter Gertsch, Robert Imhof, Eugen Zwahlen