Patents Represented by Attorney William F. Porter

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  • Adjustable and self-holding supply roll system for plotting devices
    Patent number: 5458310
    Abstract: This is a system for holding a supply roll of media in a plotter or the like. One support bar is of fixed length and has a sliding lockable collar for use with different widths of media. Another support bar is of adjustable length for use in plotters employing different widths of media. The end holder for the support bar includes a biased member holding the end in a U-shaped slot to resist lifting from forces on the supply roll as the media is removed.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: October 17, 1995
    Assignee: Calcomp Inc.
    Inventor: Dave W. Johnson