Textiles: spinning – twisting – and twining – Apparatus and processes – Unitary multiple twist devices
Patent
1978-02-22
1979-09-18
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Unitary multiple twist devices
148145, 148150, D01H 112, C21D 900
Patent
active
041678460
ABSTRACT:
Disclosed is a method of manufacture of a rotor for the open end spinning of staple fibres into yarn which is formed of a steel and has hardened surfaces at its fiber contacting and collecting surfaces, wherein the rotor may be fashioned by machining from a block of steel or formed from sheet steel, then hardening its internal fiber contacting surfaces by induction heating or carburizing or nitriding or carbonitriding at least in the region of the rotor's maximum diameter, then quenching and thereafter stress-relieving the entire rotor. Such method provides a rotor with exceptional properties of wear resistance in the area most prone to abrasive wear which latter otherwise reduces the rotor's useful service life and substantially increases yarn processing costs.
REFERENCES:
patent: 2380385 (1945-07-01), Buffum
patent: 3439487 (1969-04-01), Landwehrkamp et al.
patent: 3532333 (1970-10-01), Dehn
patent: 3875732 (1975-04-01), Ellingham
patent: 3943691 (1976-03-01), Mizon et al.
patent: 4008561 (1977-02-01), Grau
patent: 4043847 (1977-08-01), Just
patent: 4070814 (1978-01-01), Goldammer et al.
patent: 4078370 (1978-03-01), Dreger
Mechanical Engineers Handbook, Lionel Marks, Fifth Edition, 1951 (pp. 559-562).
Martin Stephen
Shaw Jack
Whiteley John
Feldman Donald H.
Platt Saco Lowell Limited
Watkins Donald
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