Patents Represented by Attorney Dirk J. Campbell Raymond W. Veneman

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  • Long life refiner disc
    Patent number: 5467931
    Abstract: A refiner disc employing sharply tapered refiner bars wherein the upper portion of at least one side tapers inward at thirty to sixty degrees from the vertical. The tapered refiner bars tend to wear sharp. A further embodiment employs refiner disc bars which have a substantially narrower bar forming the upper portion of a standard, substantially rectangular bar.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: November 21, 1995
    Assignee: Beloit Technologies, Inc.
    Inventor: John Dodd