Patents Assigned to Agfa-Gevaert Aktiengesellschaft AG
  • Device and method for reproducing originals onto light-sensitive material
    Patent number: 6037109
    Abstract: A method and a device for reproducing originals onto light-sensitive materials is described where unsharp masks for changing the reproduction process or the density values to be reproduced are determined from the density values of the original and from pre-specified gradation factors. Several different gradation factors are used to determine the mask of an original.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: March 14, 2000
    Assignee: AGFA-Gevaert Aktiengesellschaft AG
    Inventors: Markus Fuessel, Friedrich Jacob, Manfred Fuersich, Gudrun Taresch
  • Method of and device for testing a photographic film
    Patent number: 6000861
    Abstract: The invention concerns a method of testing the state of development of a photographic film in a light-proof cartridge. According to the invention, the leading edge of the film is pulled out of the cartridge, the film is positioned between a light source and a photosensor, and the amount of light passing between the light source and photosensor is measured. The state of the film is recognized as being undeveloped if a small amount of light passes therebetween.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: December 14, 1999
    Assignee: AGFA-Gevaert Aktiengesellschaft, AG
    Inventors: Helmut Zangenfeind, Reinhart Wuerfel
  • Method of and device for positioning an X-ray cassette
    Patent number: 5517546
    Abstract: A method of, and a device for positioning an X-ray cassette (5 or 10) in relation to a source (1) of X-rays that emits radiation in a specific preferred direction (A). Another beam of radiation is emitted parallel to that direction at a specific distance (d) therefrom. The other beam is intercepted by a positioning device (20) secured to the cassette. The device produces a signal as long as the angle of incidence of the other beam does not exceed a specific threshold angle (.theta.) with respect to the normal to the cassette.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: May 14, 1996
    Assignee: Agfa-Gevaert Aktiengesellschaft, AG
    Inventor: Manfred Schmidt
  • Process for the production of photographic images
    Patent number: 4348475
    Abstract: In a process for the production of photographic images exposed photographic materials are treated with a developer having an enhanced bromide ion concentration which is kept constant for the duration of the use of the developer. The advantage of the process is based on the technically uncomplicated regenerability of the developer.
    Type: Grant
    Filed: April 23, 1980
    Date of Patent: September 7, 1982
    Assignee: Agfa-Gevaert Aktiengesellschaft AG
    Inventors: Ubbo Wernicke, Heinz Meckl