Patents by Inventor Gerhard Petersdorf

Gerhard Petersdorf 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: 4685664
    Abstract: This specification discloses a sheet conveying device for correcting oblique feeding of sheets and conveying the sheets in a predetermined direction of conveyance. The sheet conveying device has first sheet conveying apparatus for conveying sheets, second sheet conveying apparatus provided downstream of the first sheet conveying apparatus with respect to the direction of conveyance, and apparatus for forming a loop between the first and the second sheet conveying apparatus by the conveying force of the first sheet conveying apparatus and thereafter displacing the second sheet conveying apparatus holding a sheet thereon in a direction perpendicular to the predetermined direction of conveyance.
    Type: Grant
    Filed: March 11, 1986
    Date of Patent: August 11, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventor: Gerhard Petersdorf
  • Patent number: 3991483
    Abstract: A photographic copying apparatus of the type in which a copy is guided through a hermetically sealed drying chamber disposed behind a developing liquid tank so that the copy may be dried by heat produced in the drying chamber is improved in that at least one heating plate is provided for guiding the copy thereon.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: November 16, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wilhelm Knechtel, Gerhard Petersdorf, Winfried Sandner
  • Patent number: RE29187
    Abstract: A copying apparatus in which thin or thick originals such as individual sheets or thick books are selectively driven over an illumination slit aperture, characterized by a transparent book support such as a glass plate connected to a known transport mechanism for individual sheets such as a pair of transport rolls. The book support is located on the extension of the transport mechanism, and the transport mechanism and the book support are selectively movable together.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: April 19, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wilhelm Knechtel, Gerhard Petersdorf, Winfried Sandner