Paper Treatment Patents (Class 492/20)
  • Patent number: 5286245
    Abstract: A flexure compensated roll comprising a rotatable roll shell around a longitudinally extending support therethrough. A longitudinally extending press shoe supported on the support. A piston movably supported on the support above a sealed pressure space. The piston has a saddle toward the interior of the roll casing. The shoe has a middle pressure chamber fluid connected with the pressure space of the piston. The shoe also has rows of hydrostatic pockets on both circumferential sides of the middle chamber. These are supplied by narrowed choke passages with hydraulic fluid. The supply of hydraulic fluid to the hydrostatic pockets bypasses the piston pressure space and/or the middle chamber and is from a pressure source to the hydrostatic pockets without pressure regulation. A regulating valve controls the force between the longitudinal support and the casing of the roll by setting the pressure in the middle chamber and by setting the pressure in the piston pressure space.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: February 15, 1994
    Assignee: J.M. Voith GmbH
    Inventor: Christian Schiel
  • Patent number: 5267932
    Abstract: A top roll for use in drafting textile fibers includes a disposable cartridge C at each end each containing sealed ball bearings and a spacer between the bearings so as to be maintained in an assembled relation and positioned upon reduced end portions of a top roll shaft by the end screw D.
    Type: Grant
    Filed: December 1, 1992
    Date of Patent: December 7, 1993
    Assignee: Progressive Equipment, Inc.
    Inventor: Kenneth R. Grant
  • Patent number: 5242361
    Abstract: A self-loading controlled deflection roll for forming a controlled pressure nip with another roll along a nip line with a hollow rotatable roll shell rotatable on an axis and a roll shaft extending through the shell and radially supporting the shell along the nip line with axially facing surfaces on the shaft and rollers rolling on said surfaces supported on the rotating roll shell accommodating bending of the roll shaft relative to the roll shell fixing their relative axial positions. One roller is axially fixed and the other roller is mounted on a rocker arm loaded with the piston and cylinder.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: September 7, 1993
    Assignee: Beloit Technologies, Inc.
    Inventors: Dale A. Brown, Arnold J. Roerig