Patents Represented by Attorney Thomas M. Speilbauer
  • Patent number: 7384437
    Abstract: The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a temporary layer comprising said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; embossing the layer comprising softened particulate curable binder material and abrasive particles to provide a pattern of raised areas and depressed areas and curing the softened particulate curable binder material to convert the embossed layer into a permanent embossed layer comprised of cured particulate binder material and abrasive particles and cure the at least partially cured primer coati
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: June 10, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis G. Welygan, Jason A. Chesley, Louis S. Moren