Patents by Inventor Steven K. Siu

Steven K. Siu 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).

  • Booklet maker with crease rolls having a slip clutch
    Patent number: 6981938
    Abstract: In a booklet maker or sheet folder wherein one or more sheets are pushed through a nip formed by a pair of crease rolls, and wherein the crease rolls are driven by gears, a slip clutch is operatively disposed between one of the crease rolls and the gear driving the crease roll. The slip clutch compensates for the abrupt change in frictional coefficient experienced by the crease rolls when one or more sheets enter the nip.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: January 3, 2006
    Assignee: Xerox Corporation
    Inventors: Raymond M. Ruthenberg, Joseph M. McNamara, David C. Van Wyngaarden, Steven K. Siu