Patents Assigned to John Heathcoat & Company Ltd.
  • Process for the production of bulked and crimped yarn
    Patent number: 3961402
    Abstract: Bulked and crimped yarn is produced by a process comprising driving heated yarn forward to form an elongated package of compressed yarn, to which yarn is continually added at one end and withdrawn from the other end. The magnitude of the deviation of the position of the take-off end from a predetermined position is measured and used as a control parameter to control the temperature of the heated yarn.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: June 8, 1976
    Assignee: John Heathcoat & Company Ltd.
    Inventors: Duncan Cameron Ferrier, Thomas Berry, Karel Murenbeeld