Patents by Inventor Borendra K. Biswas

Borendra K. Biswas 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).

  • Control system for web slitting machine
    Patent number: 5083489
    Abstract: A web slitting machine for cutting a web or roll of material includes an upper carriage assembly joined to a lower blade holder assembly by a selectively removable guide key which is milled to provide a predetermined cant angle for the blade. The blade is lowered into position by a piston which is rectangular and includes a torsion-resisting sleeve to prevent rotation of the piston about its vertical axis. A pneumatic control provides a plurality of control modes whereby the blade may be raised and lowered with or without locking the upper carriage assesmbly to its transverse bar and vice-versa. A unique side shift adjustment is provided whereby the blade may be shifted to a half-stroke position and the upper carriage locked when the blade is positioned against a lower knife. This ensures that the pressure of the blade against the knife is the pressure exerted at the mid point of the stroke.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: January 28, 1992
    Assignee: Tidland Corporation
    Inventors: John W. Tidland, Reinhold A. Schable, Casey M. Vander Bom, Borendra K. Biswas, William R. Miller
  • Cant angle adjustment for a web slitting machine
    Patent number: 5058475
    Abstract: A web slitting machine for cutting a web or roll of material includes an upper carriage assembly joined to a lower blade holder assembly by a selectively removable guide key which is milled to provide a predetermined cant angle for the blade. The blade is lowered into position by a piston which is rectangular and includes a torsion-resisting sleeve to prevent rotation of the piston about its vertical axis. A pneumatic control provides a plurality of control modes whereby the blade may be raised and lowered with or without locking the upper carriage assembly to its transverse bar and vice-versa. A unique side shift adjustment is provided whereby the blade may be shifted to a half-stroke position and the upper carriage locked when the blade is positioned against a lower knife. This ensures that the pressure of the blade against the knife is the pressure exerted at the mid point of the stroke.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: October 22, 1991
    Assignee: Tidland Corporation
    Inventors: John W. Tidland, Reinhold A. Schable, Casey M. Vander Bom, Borendra K. Biswas, William R. Miller
  • Side shifting apparatus for cutting blade in a web slitting machine
    Patent number: 5025693
    Abstract: A web slitting machine for cutting a web or roll of material includes an upper carriage assembly joined to a lower blade holder assembly by a selectively removable guide key which is milled to provide a predetermined cant angle for the blade. The blade is lowered into position by a piston which is rectangular and includes a torsion-resisting sleeve to prevent rotation of the piston about its vertical axis. A pneumatic control provides a plurality of control modes whereby the blade may be raised and lowered with or without locking the upper carriage assembly to its transverse bar and vice-versa. A unique side shift adjustment is provided whereby the blade may be shifted to a half-stroke position and the upper carriage locked when the blade is positioned against a lower knife. This ensures that the pressure of the blade against the knife is the pressure exerted at the mid point of the stroke.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: June 25, 1991
    Assignee: Tidland Corporation, a Washington Corp.
    Inventors: John W. Tidland, Reinhold A. Schable, Casey M. Vander Bom, Borendra K. Biswas, William R. Miller