Patents by Inventor Franz Arendt

Franz Arendt 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).

  • Method and device for in-register exposing and in-register printing of a flexible letterpress form
    Patent number: 5094164
    Abstract: A method of in-register exposing and printing of a flexible letterpress form for spot varnishing, which comprises fixing on a copying cylinder in-register a flexible letterpress form having a register system in a region of the leading edge of the form, and exposing the form, then clamping the flexible letterpress form on a rubber-blanket cylinder having a greater diameter than that of the copying cylinder so as to compensate for distortion of a subject in circumferential direction during circular exposure.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: March 10, 1992
    Assignee: Heidelberger Druckmaschinen Ag
    Inventors: Karl Kowalczyk, Franz Arendt
  • Copying frame for producing offset plates
    Patent number: 4626098
    Abstract: A copying frame machine for producing offset plates includes a rubber cover, a copying frame having a glass plate superimposable on the rubber cover so as to sandwich and lock therebetween an offset printing plate, a film and a sheet of copying material, means for applying a vacuum between the rubber cover and the glass plate, and vibration-generating means for applying vibration to at least one of the glass plate and the rubber cover.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: December 2, 1986
    Assignee: Heidelberger Druckmaschinen AG
    Inventor: Franz Arendt
  • Device for film-mounting print control strips at a precise level and in registry
    Patent number: 4469025
    Abstract: A device for film-mounting print control strips at a precise level and in registry including a foil forming a template for a mounting foil when mounting a print control strip, the foil template containing ink and measuring-field information necessary for the film mounting at a precise level and in registry, and further containing a characteristic of printing plate centers.
    Type: Grant
    Filed: May 26, 1983
    Date of Patent: September 4, 1984
    Assignee: Heidelberger Druckmaschinen
    Inventors: Gerhard Loffler, Franz Arendt
  • Sheet-guiding foil as a covering for impression cylinders
    Patent number: 4327135
    Abstract: A sheet-guiding foil as a sheath for an impression cylinder in rotary offset perfecting presses, one surface of the foil being smooth while the opposite surface thereof is formed with spherical calottes of equal height and of statistically uniform distribution, including a chemically resistant, wear-resistant and rigid backing layer with good ink transfer behavior and a textured surface, and a thin chromium layer applied thereto for evening out microroughness, and the method of production.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: April 27, 1982
    Assignee: Heidelberger Druckmaschinen Aktiengesellschaft
    Inventors: Arno Wirz, Peter Sobotta, Franz Arendt, Otto K. Gramlich