Patents Assigned to Hi-Control Limited
  • Abrasive sheet with the surface of the abrasive particles cleaned and method of making
    Patent number: 4835052
    Abstract: A process for preparing an abrasive sheet comprising(a) mixing abrasive particles with an adhesive resin to form a slurry, and stirring the slurry(b) painting the slurry uniformly on a base sheet(c) permitting the slurry to dry and harden(d) spraying the abrasive sheet with an organic solvent(e) immediately thereafter spraying the surface of the abrasive sheet with compressed air of nitrogen gas.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: May 30, 1989
    Assignee: Hi-Control Limited
    Inventor: Motokazu Yamamoto
  • Abrasive sheet and method of preparation
    Patent number: 4751797
    Abstract: An abrasive sheet or polishing sheet containing an abrasive layer divided into discrete blocks by a network of grooves. The polishing sheet is prepared by making a slurry of abrasive particles and a resin adhesive agent of low density and viscosity, spreading it on a base and heating the resulting sheet from below the base.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: June 21, 1988
    Assignee: Hi-Control Limited
    Inventor: Akira Fujimori