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US3689620A Expired / Lapsed US ⏱️ 0.0 years remaining

High speed wet spinning technique

Assignee: Asahi Kasei Corp
•
Filing: 1970-12-02
•
Granted: 1972-09-05
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Expires: 1990-12-02
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Abstract

Abstract In the spinning process the filaments leaving the spinnaret in a vertically downward direction pass through a first coagulating bath and the fluid entrained by the filaments is decelerated by means of concentric angularly directed jets of fluid prior to passage through a second coagulating bath. The filament may then pass-over a bar which changes the direction of the filament and removes entrained fluid. Further coagulating bath treatment may be provided by passage through the trough of a saddle guide prior to passage between a pair of vane type rolls for shaking the remaining bath fluid from the filaments. The filaments are then loosely deposited on a travelling web for further treatment. Specific apparatus for carrying out the process is provided including elastic covered vanes on the rolls as well as several embodiments for the decelerating fluid jet arrangement.

Inventors

  • 👤 Toshio Miyazaki
  • 👤 Etuzou Omura
  • 👤 Kyoku Katakabe
  • 👤 Minoru Makita
  • 👤 Enji Iwase
  • 👤 Hideo Tsutsumiuti
  • 👤 Takashi Yotsumoto
  • 👤 Fumiaki Ikeda
  • 👤 Yoshiro Takashima
  • 👤 Hiromu Sueyoshi
  • 👤 Tomio Maesaka

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 12:47
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/02; D01F2/04; D01D; D01D5/00; D01D5/06

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 59 words
A process as set forth in claim 1 wherein said filaments are guided through the axial center of said liquid brake unit while directing a plurality of liquid jets arranged concentrically about said multifilaments downwardly and angularly against said filaments to retard the velocity of the entrained bath liquid and thereby prevent agitation of a second coagulating bath liquid.
Claim 2
Dependent Claim 48 words
A process as set forth in claim 1 comprising removing bath liquid deposited on said vaned rolls by the passage and vibration of said filaments therebetween by centrifugal force due to the rotation of said rolls to prevent the wet attachment of said filaments onto said vaned rolls.

References Cited (Backward Citations)

US2046575A Cited
US1828497A Cited
DE559093C Cited
DE651171C Cited
US2399258A Cited
US2467541A Cited
US2457350A Cited
US2730757A Cited
US3333040A Cited
FR1469243A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-09-05 1976-03-06 1976-09-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-05 1980-03-06 1980-09-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-05 1984-03-06 1984-09-05 $7700.00 Window Closed / Lapsed

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