Patents by Inventor Donald G. MacBean

Donald G. MacBean 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: 4438789
    Abstract: The invention relates to a woven all-synthetic monofilament dryer fabric for use in a paper-making machine. The fabric is constituted by a belt woven with warp and weft strands with the warp strands extending in the machine direction. The belt is interconnected at opposed ends by a woven single pintle pin seam to form an endless belt. The warp strands in at least rewoven end portions of the belt are flattened strands.
    Type: Grant
    Filed: June 8, 1983
    Date of Patent: March 27, 1984
    Assignee: JWI Ltd.
    Inventor: Donald G. MacBean
  • Patent number: 4379735
    Abstract: A single ply forming fabric for use on a twin wire paper making machine wherein a flat jet stream of pulp is injected between an inner, conveying fabric and an outer, backing fabric converging towards each other for applying opposed pressure to the pulp for removing water therefrom to form a sheet of pulp. The single ply forming fabric of the present invention constitutes the outer, backing fabric and is interwoven with a plurality of monofilament polymeric warp strands with approximately 100% warp fill and monofilament polymeric weft strands extending in the cross-machine direction and disposed in vertically aligned groups of at least three to obtain greater stiffness in the cross-machine direction whereby to substantially redistribute pulp widthwise of the sheet when supported on the conveying fabric.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: April 12, 1983
    Assignee: JWI Ltd.
    Inventor: Donald G. MacBean
  • Patent number: 4314589
    Abstract: A paper forming fabric having two layers of synthetic weft strands with interwoven synthetic warp strands and approximately 100% warp fill. The upper layer of the fabric comprises a regular array of mesh openings in which the distance between consecutive openings measured in the weft direction is never greater than the thickness of a single warp strand and measured in the warp direction is never greater than the thickness of a single weft strand.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: February 9, 1982
    Assignee: JWI Ltd.
    Inventors: John G. Buchanan, Donald G. MacBean
  • Patent number: 4290209
    Abstract: An improved dryer fabric, woven entirely from monofilament plastic polymeric warp and weft strands, having a lower permeability to air flow and lower modulus of elasticity than normal fabrics, wherein at least the warp strands are flattened in cross-section, with the long axis of the flattened section extending parallel to the plane of the fabric and wherein the weft strands may be shaped so as to more or less conform to the horizontally directed passages of the mesh naturally formed by the woven warp strands and may also be relatively more malleable than the warp strands so that under stress they can adapt to conform to the shape of mesh interstices thereby to restrict these and still further reduce the permeability.
    Type: Grant
    Filed: April 15, 1980
    Date of Patent: September 22, 1981
    Assignee: Jwi Ltd.
    Inventors: John G. Buchanan, Donald G. MacBean