Inventors:
Timothy L. Hoopman - River Falls WI
Stanley B. Collins - White Bear Lake MN
James A. Servatius - Inver Grove Heights MN
Assignee:
3M Innovative Properties Company - St. Paul MN
International Classification:
B24B 100
B24D 1100
Abstract:
A method and apparatus for knurling a workpiece in which the knurl pattern has an oblique helix angle relative to the longitudinal axis of the cylindrical workpiece. Also disclosed is a method of molding a molded article with the knurled workpiece to impart the inverse of the knurl pattern onto the molded article, such a molded article, a method of forming a structured abrasive article with the molded article, and such an abrasive article.