Open-end spinning device
AssigneeSchubert & Salzer
InventorHans Landwehrkamp
Life of this patent
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Abstract
An open-end spinning machine including a spinning rotor having walls which converge together at an angle of at least 40.degree. to define a collecting channel at the junction therebetween. A thread draw-off nozzle projects into the spinning rotor and has a curved thread contact surface. The radius of curvature of the thread contact surface is between 7.5 and 8.5 mm. Such enables yarn to be produced with a rotor speed of between 50,000 and 70,000 revolutions per minute.
Claims3
A spinning rotor for use in an open-end spinning device for producing twisted open-end yarns while said spinning rotor is driven at speeds of between 50,000 and 70,000 revolutions per minute, said spinning rotor comprising:
- a. upper and lower walls converging together at an angle of between 40.degree. and 60.degree. defining a collecting channel for yarn being produced at the junction of said upper and lower wall,
- b. a thread draw-off nozzle extending into said rotor,
- c. a bore extending through said thread draw-off nozzle, and
- d. a thread contact surface surrounding a lower end of said bore over which yarn being produced in said rotor passes to exit through said draw-off nozzle,
- e. said thread contact surface having a radius of curvature between 7.5 and 8.5 mm.
Dependencies are inferred from the claim text.