Discontinuous Or Differential Coating Impregnation Or Bond Patents (Class 451/534)
  • Patent number: 5489235
    Abstract: The invention provides an abrasive article having a surface having a machine direction axis and opposite side edges, each side edge being parallel to the machine direction axis and a plurality of parallel rows of abrasive composites in fixed position on the surface, each row being aligned at an angle with a side edge which is neither 0.degree. nor 90.degree., and methods for making such an abrasive article. The abrasive article of this invention also can be used in any convenient form including an endless belt. The resulting abrasive article provides a high rate of cut, long belt life, and a relatively fine surface finish on the workpiece being abraded.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: February 6, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John J. Gagliardi, Roger C. Lokken
  • Patent number: 5454844
    Abstract: An abrasive article having a sheet-like structure having a major surface and having deployed in a fixed position thereon a plurality of abutting abrasive composites in an area spacing of at least 1,200 composites/cm.sup.2, each of the composites comprising a plurality of abrasive particles dispersed in a binder. The invention also relates to a method for reducing a surface finish of a workpiece surface using the abrasive article and a process for making the abrasive article of the invention.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: October 3, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Louis D. Hibbard, Stanley B. Collins, John D. Haas
  • Patent number: 5370718
    Abstract: A method of producing an abrasive tape by preparing an abrasive paint containing abrasive grains having a grain size of 0.05 to 10 .mu.m and containing air bubbles which, upon coating of a flexible substrate, form an abrasive layer having pores in content of 10 to 60% by volume based on a volume of said abrasive layer.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: December 6, 1994
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Masatoshi Terazawa, Toshisada Inoue