Patents Assigned to Dawson International Limited
  • Patent number: 4304048
    Abstract: Textile material to be dried is mounted in an apparatus on a plurality of supports (1). The supports are moved along a predetermined path, and suction and radio frequency energy are applied to the material, to dry it.A pump (10a) which can pump both liquid and vapor draws air through the material to remove water. A valve (12) is associated with the suction duct (2) leading to each support, and these valves are adjusted as the supports move along the path, so that a maximum amount of suction is applied to the wet material and a lesser amount of suction to the drier material.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: December 8, 1981
    Assignee: Dawson International Limited
    Inventors: Geoffrey A. Smith, Thomas F. McAuley
  • Patent number: 4104019
    Abstract: For the fixation of dyes and other chemicals in textile fibres, however formed or combined, such fibres are conveyed through a closely confining tube located between electrodes by which a radio frequency energy field is created in the tube, the packing of the tube with such fibres being sufficiently dense to ensure that, when heated by the energy field, the tube and its contents form a partially self-sealing pressure chamber whereby the rate of reaction of the dye or chemical on the fibres is accelerated. Various embodiments of apparatus for the performance of such a fixation process on fibres of different forms and combinations are also shown.
    Type: Grant
    Filed: May 18, 1976
    Date of Patent: August 1, 1978
    Assignee: Dawson International Limited
    Inventor: Geoffrey Allan Smith