Patents Represented by Attorney Robert M. M. Sperry

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  • Die lifting mechanism
    Patent number: 5915515
    Abstract: An improved die lifting device comprising a plurality of roller-carrying cam mechanisms, actuable by a common hydraulic ram located externally of the die area, to provide strong, rapid, reliable operation, while occupying a minimum of space within the die area.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: June 29, 1999
    Inventor: Rodney L. Blair