Patents Represented by Attorney Herbert M. Adrian, Jr.

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  • Polyamides having improved dyeability and thermal stability
    Patent number: 3944518
    Abstract: A method for improving the polymerization of polyamide compositions and the improved compositions formed thereby by polymerizing the polyamide in the presence of a small molar percent of a phosphonic acid salt of an organic diamine. The phosphonic acid salt increases the polymerization rate and results in a polymer of improved whiteness.
    Type: Grant
    Filed: June 15, 1966
    Date of Patent: March 16, 1976
    Assignee: Imperial Chemical Industries, Ltd.
    Inventors: Harold George Burrows, Stephen John Hepworth
  • Process for uniformly drawing polyethylene terephthalate filaments to form high shrinkage fibers
    Patent number: 3943138
    Abstract: A process for uniformly drawing tows of poly(ethylene terephthalate) to produce high shrinkage fibres wherein the drawing is effected with the tow in a hot water saturated condition at a controlled birefringence, temperature and draw ratio. The product has initial shrinkages (as defined) of at least 5% and a high uniformity.
    Type: Grant
    Filed: September 11, 1972
    Date of Patent: March 9, 1976
    Assignee: Imperial Chemicl Industries, Ltd.
    Inventors: Geoffrey Marshall, Eric Ivan Riseley
  • Process for the production of effect yarns
    Patent number: 3939632
    Abstract: Producing effect yarns using the false twist principle by varying the twist density in the heater zone to alter the degree of bulk and thus the texture along the length of the finished yarn.
    Type: Grant
    Filed: May 14, 1973
    Date of Patent: February 24, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Werner Doschko, Hans Pscheidl
  • Method and apparatus for production of false twist textured composite yarn
    Patent number: 3936996
    Abstract: A cellulose acetate yarn and a nylon or polyester yarn are independently false twist textured in opposite directions on the same machine using different false twisters to impart to each its optimum level of false twist and the yarns are collected side-by-side on a package. The composite balanced, substantially zero-torque yarn is autoclaved, twisted in the course of coning and circular knit into fabrics with no stripping back of the acetate over the nylon or polyester.
    Type: Grant
    Filed: November 8, 1973
    Date of Patent: February 10, 1976
    Assignee: Amcel Europe, S.A.
    Inventor: Heinz Schiffer
  • Apparatus for the detection of breaks in moving threadlines
    Patent number: 3932854
    Abstract: An apparatus and method for detecting breaks in a travelling threadline of a synthetic filament is described. The motion of the threadline is monitored for speed by means of generating an electrical current by passage of the threadline across an idler roll. Increases or decreases in the speed of the threadline change the frequency of the electrical current generated, thereby providing means for signaling threadline speed changes such as occur in breaks and wrapping of the threadline.
    Type: Grant
    Filed: May 8, 1972
    Date of Patent: January 13, 1976
    Assignee: Imperial Chemical Ind. (Europa) Fibres
    Inventors: Wolfgang Wetzel, Manfred Muller