Patents by Inventor Luigi Silveri

Luigi Silveri 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).

  • Multiple filter dynamic washer
    Patent number: 5538632
    Abstract: A pressurized dynamic pulp washer including an annular hollow housing in which the stock is driven axially along a plurality of stationary, annular, coaxial wash filters in axially reversible directions, with an annular rotatable shell between the wash filters to urge liquid through openings in the filters, to generate axial, radial and circumferential velocities in the slurry to create localized pulses in the slurry to urge liquid through the filters with wash liquid being introduced to replace liquid filtered from the fibers in the slurry.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: July 23, 1996
    Assignee: Beloit Technologies, Inc.
    Inventors: William A. Gero, Goda Rangamannar, Luigi Silveri
  • Apparatus for secondary fibre processing
    Patent number: 4891099
    Abstract: A system of processing baled secondary fibre furnish is provided. The system includes the steps of breaking the baled furnish, dry screening the furnish to remove abrasive contaminants, and then repulping the dry screened furnish.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: January 2, 1990
    Assignee: Beloit Corporation
    Inventors: Luigi Silveri, Stavros Paraskevas
  • Process for secondary fibre processing
    Patent number: 4812205
    Abstract: A method of processing baled secondary fibre furnish is provided. The method includes the steps of breaking the baled furnish, dry screening the furnish to remove abrasive contaminants, and then repulping the dry screened furnish.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: March 14, 1989
    Assignee: Beloit Corporation
    Inventors: Luigi Silveri, Stavros Paraskevas
  • Method and apparatus for deinking
    Patent number: 4548673
    Abstract: A method and apparatus for deinking a fibre stock or slurry. In order to optimize the separation process the invention proposes to independently control the air injection phase, the mixing phase, and the separation phase by splitting them into separate steps.Thus, there is provided a separation cell which is fed with slurry from an inlet. Air is introduced into the slurry before entry into the separation cell and before entering a mixing section which mixes the air and slurry before entering the separation cell. The air is introduced under pressure by way of a porous sintered sleeve, while the mixing is achieved by the provision of three turbulence discs in the preferred embodiment. Alternative turbulent generating means may be employed.The mixing ensures contact of the ink with the air bubbles which separate out in the separation cell and rise to the surface as a foam. The foam is removed by suction, while the deinked fibre slurry is drawn off from the tank by means of a weir or stand pipe.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: October 22, 1985
    Assignee: Beloit Corporation
    Inventors: Ashok K. Nanda, Luigi Silveri, Michael A. McCool