Patents by Inventor George Patrick Preston

George Patrick Preston 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).

  • Apparatus for the distribution of loose fibrous material
    Patent number: 3989309
    Abstract: Loose fibrous material, e.g. cut tobacco, is distributed via a horizontal rotor drum in a housing; the drum having external rakes for picking up tobacco deposited on an ascending portion of the drum and presenting it to suction-operated, draw-off pipes in a top portion of the housing. Tobacco which is not drawn-off is carried around on the rotating drum for re-presentation to the pipes. This re-cycling avoids an external return system and degradation of the tobacco.
    Type: Grant
    Filed: November 11, 1975
    Date of Patent: November 2, 1976
    Assignee: Imperial Group Limited
    Inventor: George Patrick Preston