Patents by Inventor Geoffrey D. Marsh

Geoffrey D. Marsh 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).

  • Drying wood pulp
    Patent number: 4253822
    Abstract: Wood pulp is dried by contacting it with heated air and subjecting the air and pulp to turbulence in a dryer comprising relatively contrarotating members which intermesh on rotation so that dried wood pulp fibres are suspended in the air issuing from the dryer. The heated air is produced by heating air in a burner to a temperature of from 300.degree. to 600.degree. C. by burning a fuel in the air.The dried wood pulp fibres are separated from the air and a portion of the air thus separated is recycled to the burner. The air admitted to the burner comprises fresh air and recycled air, the proportion of fresh air being such that the heated air contacting the pulp has an oxygen content of less than 10 percent by volume. The use of recycled air reduces the risk of fire when drying the wood pulp.
    Type: Grant
    Filed: September 28, 1978
    Date of Patent: March 3, 1981
    Assignee: Courtaulds Limited
    Inventor: Geoffrey D. Marsh