Patents by Inventor Martin J. Sferrazza

Martin J. Sferrazza has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Controlled intensity high speed double disc refiner
    Patent number: 5167373
    Abstract: A double disc refiner apparatus (10) and associated method, in which two counter-rotating refiner discs (26,28) which define a refining zone (58) therebetween, are counter-rotated at different steady-state speeds, such as 1800 rpm and 1200 rpm. For energy-efficiency, the feed end disc (26) is rotated at a faster speed than the control end disc (28), but in some instances, desired refiner output quality can be achieved by rotating the control end disc faster than the feed end disc.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: December 1, 1992
    Assignee: ABB Sprout-Bauer, Inc.
    Inventors: William L. Bohn, Gary L. Jackson, Martin J. Sferrazza