Patents by Inventor Roger D. Welch

Roger D. Welch 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).

  • Patent number: 6311745
    Abstract: A dispensing system for containing and dispensing powders, such as toner and developers, includes a dispensing container having an outlet and a chamber that contains powder. A fluidizing system introduces a gas into the chamber to increase the fluidity of the powder. The dispensing system includes a valve having a first portion attached to the dispensing container, and a second portion that attaches to a receiving container that receives the powder dispensed from the dispensing container. The valve is operable to dispense the powder from the dispensing container to the receiving container. The fluidizing system includes a porous member in the chamber and a gas source that flows a gas into the chamber through the porous member to fluidize the powder and enhance dispensing of the powder.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: November 6, 2001
    Assignee: Xerox Corporation
    Inventors: Roger D. Welch, Roman S. Kulik