Patents by Inventor Sheldon D. Roberts

Sheldon D. Roberts 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).

  • Food pan configured for nested stacking
    Patent number: 6557720
    Abstract: A pan for use with a well for receiving the pan is disclosed herein. The pan includes a bottom panel, a plurality of walls, and a ramp. The plurality of walls extend upwardly from the bottom panel and define a cavity. The plurality of walls also have an upper end which defines a top opening. The upper end has an extension away from the cavity which defines a rim. The ramp is proximate the rim and exterior to the cavity, whereby the pan rides up on the ramp when the pan is drawn up against the well.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: May 6, 2003
    Assignee: The Vollrath Company, L.L.C.
    Inventors: David R. Tosdale, Mark L. Baumann, Victor M. Frauenfeld, William C. Heimerl, Ronald J. McGettrick, Richard E. Velten, Jeffrey T. Zank, Cory R. Boudreau, William C. Lindeman, Sheldon D. Roberts
  • Food pan configured for nested stacking
    Publication number: 20010035418
    Abstract: A pan for use with a well for receiving the pan is disclosed herein. The pan includes a bottom panel, a plurality of walls, and a ramp. The plurality of walls extend upwardly from the bottom panel and define a cavity. The plurality of walls also have an upper end which defines a top opening. The upper end has an extension away from the cavity which defines a rim. The ramp is proximate the rim and exterior to the cavity, whereby the pan rides up on the ramp when the pan is drawn up against the well.
    Type: Application
    Filed: January 19, 2001
    Publication date: November 1, 2001
    Inventors: David R. Tosdale, Mark L. Baumann, Victor M. Frauenfeld, William C. Heimerl, Ronald J. McGettrick, Richard E. Velten, Jeffrey T. Zank, Cory R. Boudreau, William C. Lindeman, Sheldon D. Roberts
  • Stuffed chamber ribbon cartridge
    Patent number: 4840503
    Abstract: A fabric ribbon (13) is stuffed in a cartridge chamber (11). Two pinch rollers (35 and 39) are driven by a third roller (29). The direction for forces from the pinch rollers is toward a wall portion (9a), which is near an opening having a dam (ridge 67) which leads to chamber (74) have an exit slot (71) located near the wall portion (9a). The drive roller (29) is positioned to be located where the drive roller of an existing cartridge was located, making this cartridge interchangeable with a cartridge for a spool-to-spool ribbon.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: June 20, 1989
    Assignee: International Business Machine Corporation
    Inventors: Sheldon D. Roberts, Louann B. Samuels, David T. Shadwick