Patents Assigned to Vyskumny ustav papieru a celulosy of Bratislava
  • Apparatus for deinking printed wastepapers
    Patent number: 4147616
    Abstract: An apparatus for deinking printed wastepapers in a system of separators through which printed wastepapers, previously impregnated with surface-active agents and alkalis, and repulped in the presence of an organic hydrocarbon compound and high-adsorptive flakes obtained by precipitating solutions of metal soaps of fatty or bituminous acids with solutions of salts of alkaline earths, are forced. The adsorptive flakes containing printing ink are separated from the repulped paper stock by latent vortex action.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: April 3, 1979
    Assignee: Vyskumny ustav papieru a celulosy of Bratislava
    Inventors: Cestmir Balcar, Antonin Kostka, Jaroslav Havranek, Marcel Lalak