Patents by Inventor Gabor Forgo

Gabor Forgo 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).

  • Process for electrographic image production and an apparatus for carrying out this process
    Patent number: 4240723
    Abstract: A process for a latent electrostatic image or a conductivity image on a photoconductor, a single-component magnetic toner being used for development and a magnetic brush being used not only for application of the toner to the image, but also for removal of residual toner. The brush may be one and the same brush for both tasks or separate brushes identical in structure may be used for each of the two tasks.
    Type: Grant
    Filed: May 16, 1975
    Date of Patent: December 23, 1980
    Assignee: Elfotec A.G.
    Inventor: Gabor Forgo
  • Process for electrophotographic image formation and transfer
    Patent number: 4210448
    Abstract: Sharp, high-resolution copies of electrostatc images developed with a one-component magnetic toner can be obtained by corona transfer to a copy sheet if toner resistivity is at least 10.sup.13 ohm-cms. Such resistivity is attainable by incorporating carbon within the toner particles in an amount preferably about 1 to 1.3 per cent by weight, the surface of the toner particles either not having any carbon thereon or it being present in amounts of at most 0.7 per cent by weight.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: July 1, 1980
    Assignee: Elfotec A.G.
    Inventor: Gabor Forgo
  • Process and apparatus for developing and cleaning a charge image carrier
    Patent number: 4181422
    Abstract: A process for developing a latent charge image on a repeatedly usable charge image carrier and for cleaning the carrier after transfer of the developed charge image by means of a single magnetic brush having a layer of magnetic one-component toner and a thickening of the layer of toner in the region of contact of the magnetic brush with the charge image carrier.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: January 1, 1980
    Assignee: Elfotec A.G.
    Inventors: Gabor Forgo, Karl Moser