US3604194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber supply method and apparatus in an open-end spinning system utilizing airflow and centrifugal force
Assignee: Toray Industries Inc
•
Filing: 1969-01-27
•
Granted: 1971-09-14
•
Expires: 1989-01-27
Abstract
Abstract Disclosed herein is a method and apparatus for use with yarnspinning equipment wherein individual fibers are extracted from a bundle of fibers delivered from a supply source at a position in a fiber supply device where the fluid speed of the airstream for conveying the fibers is maximum, while the bundle of fibers is still gripped by the supply source. In the present invention, a distance between the nip point of the supply source and the above-mentioned position is particularly defined with respect to the staple length of the spinning material. Furthermore, preferable shapes are illustrated for the fiber guide conduit, the fiber-separating passage, and the fiber supply conduit of the fiber supply device for producing a high quality yarn.
Inventors
- 👤 Hiroshi Edagawa
- 👤 Keiichi Minami
- 👤 Kozo Susami
- 👤 Masakazu Hirota
- 👤 Masaaki Tabata
- 👤 Toshimoto Matsubara
- 👤 Kunio Shinkai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/30; D01H4/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
In an open-end spinning system wherein fibers are supplied from a source consisting of a bundle of fibers which are separated and carried by pneumatic flow into a spinning rotor for producing yarn: a method comprising controlling the flow speed of said pneumatic flow to be a maximum at a distance L downstream of a nip point of said bundle of fibers, said distance L being defined as 2/3 1 L l wherein l is the average length of said fibers, whereby said fibers are extracted from said bundle of fibers at said point of maximum flow speed, thereby decreasing breakage and unevenness of the yarn.
Claim 2
Dependent Claim
106 words
In an open-end spinning system wherein fibers are supplied from a source consisting of a bundle of fibers which are separated and carried by pneumatic flow into a spinning rotor for producing yarn: a method comprising controlling the flow speed of said pneumatic flow to be a maximum at a distance L downstream of a nip point of said bundle of fibers, said distance L being defined as 2/3 1 L l wherein l is the average length of said fibers, whereby said fibers are extracted from said bundle of fibers at said point of maximum flow speed, thereby decreasing breakage and unevenness of the yarn.
Claim 3
Dependent Claim
195 words
In open-end spinning apparatus having a spinning rotor, a fiber-supply device for supplying separated fibers from a bundle of fiBers and for transporting said fibers by a pneumatic flow to said spinning rotor, and means for withdrawing said fibers from said rotor to produce a twisted yarn; an improvement wherein said fiber supply device comprises elements including a fiber guide conduit for receiving said bundle of fibers therethrough, fiber-separating means disposed downstream of said fiber guide conduit for receiving said fibers from said guide conduit, and a fiber supply conduit disposed downstream of said fiber-separating means and in communication with a fiber input to said rotor for coupling said fibers from said separating means to said rotor, said elements being arranged so that the speed of said pneumatic flow is a maximum within said fiber supply device at a distance L downstream of a nip point of said bundle of fibers, said distance L being defined as 2/3 l L l wherein l is the average length of said fibers, whereby said fibers are extracted from said bundle of fibers at said point of maximum flow speed, thereby decreasing breakage and unevenness of the yarn.
Claim 4
Dependent Claim
195 words
In open-end spinning apparatus having a spinning rotor, a fiber-supply device for supplying separated fibers from a bundle of fiBers and for transporting said fibers by a pneumatic flow to said spinning rotor, and means for withdrawing said fibers from said rotor to produce a twisted yarn; an improvement wherein said fiber supply device comprises elements including a fiber guide conduit for receiving said bundle of fibers therethrough, fiber-separating means disposed downstream of said fiber guide conduit for receiving said fibers from said guide conduit, and a fiber supply conduit disposed downstream of said fiber-separating means and in communication with a fiber input to said rotor for coupling said fibers from said separating means to said rotor, said elements being arranged so that the speed of said pneumatic flow is a maximum within said fiber supply device at a distance L downstream of a nip point of said bundle of fibers, said distance L being defined as 2/3 l L l wherein l is the average length of said fibers, whereby said fibers are extracted from said bundle of fibers at said point of maximum flow speed, thereby decreasing breakage and unevenness of the yarn.
Claim 5
Dependent Claim
95 words
Spinning apparatus as set forth in claim 2, in which said fiber guide conduit is provided with an upstream opening for receiving said bundle of fibers, said opening having a trumpet shape spreading out in the upstream direction and defined by the expressions m 2d, and D 1.5d, wherein, D represents the inside diameter of the upstream extremity portion of said trumpet shape opening in said guide conduit, d represents the inside diameter of the downstream extremity of said trumpet-shape opening in said guide conduit, and m represents the axial length of said trumpet-shape opening.
Claim 6
Dependent Claim
218 words
In a spinning apparatus comprising a fiber supply device utilizing an airstream for conveying a bundle of fibers supplied from a supply source, while shredding said bundle of fibers into individual fibers; a spinning rotor for accumulating said individual fibers supplied from said fiber supply device upon an inside wall of said rotor while rotating at high speed, said rotor provided with an aperture for taking out yarn produced therein, means for stripping said accumulated fibers from said inside wall of said rotor while rotating said rotor and taking up produced yarn from said rotating rotor through said aperture; an improvement wherein said fiber supply device comprises a fiber guide conduit disposed adjacent to said supply source said fiber guide conduit having a flattened cross section in its upstream portion, fiber-separating means having an upstream inlet disposed to receive fibers from a downstream outlet of said fiber guide conduit, a fiber supply conduit disposed between said fiber-separating means and the inside of said rotor, and means for controlling the speed of said airstream to be at a maximum at a position within said fiber-separating means, said position being spaced downstream from a nip point of said fiber supply device at a distance L defined as l L l wherein, l represents the average fiber length of said fibers.
Claim 7
Dependent Claim
218 words
In a spinning apparatus comprising a fiber supply device utilizing an airstream for conveying a bundle of fibers supplied from a supply source, while shredding said bundle of fibers into individual fibers; a spinning rotor for accumulating said individual fibers supplied from said fiber supply device upon an inside wall of said rotor while rotating at high speed, said rotor provided with an aperture for taking out yarn produced therein, means for stripping said accumulated fibers from said inside wall of said rotor while rotating said rotor and taking up produced yarn from said rotating rotor through said aperture; an improvement wherein said fiber supply device comprises a fiber guide conduit disposed adjacent to said supply source said fiber guide conduit having a flattened cross section in its upstream portion, fiber-separating means having an upstream inlet disposed to receive fibers from a downstream outlet of said fiber guide conduit, a fiber supply conduit disposed between said fiber-separating means and the inside of said rotor, and means for controlling the speed of said airstream to be at a maximum at a position within said fiber-separating means, said position being spaced downstream from a nip point of said fiber supply device at a distance L defined as l L l wherein, l represents the average fiber length of said fibers.
Claim 8
Dependent Claim
242 words
In a spinning apparatus comprising a fiber supply device utilizing an airstream for conveying a bundle of fibers supplied from a supply source, while shredding said bundle of fibers into individual fibers; a spinning rotor for accumulating said individual fibers supplied from said fiber supply device upon an inside wall of said rotor while rotating at high speed, said rotor provided with an aperture for taking out yarn produced therein, means for stripping said accumulated fibers from said inside wall of said rotor while rotating said rotor and taking up produced yarn from said rotating rotor through said aperture; an improvement wherein said fiber supply device comprises a fiber guide conduit disposed adjacent to said supply source, fiber-separating means having an upstream inlet disposed to receive fibers from a downstream outlet Of said fiber guide conduit, wherein a portion of either of said fiber guide conduit and said fiber-separating means is provided with at least a portion having a flattened cross section in the path of said fibers conveyed by said airstream, a fiber supply conduit disposed between said fiber-separating means and the inside of said rotor, and means for controlling the speed of said airstream to be at a maximum at a position within said fiber-separating means, said position being spaced downstream from a nip point of said fiber supply device at a distance L defined as 2/3 1 L l wherein l represents the average fiber length of said fibers.
Claim 9
Dependent Claim
242 words
In a spinning apparatus comprising a fiber supply device utilizing an airstream for conveying a bundle of fibers supplied from a supply source, while shredding said bundle of fibers into individual fibers; a spinning rotor for accumulating said individual fibers supplied from said fiber supply device upon an inside wall of said rotor while rotating at high speed, said rotor provided with an aperture for taking out yarn produced therein, means for stripping said accumulated fibers from said inside wall of said rotor while rotating said rotor and taking up produced yarn from said rotating rotor through said aperture; an improvement wherein said fiber supply device comprises a fiber guide conduit disposed adjacent to said supply source, fiber-separating means having an upstream inlet disposed to receive fibers from a downstream outlet Of said fiber guide conduit, wherein a portion of either of said fiber guide conduit and said fiber-separating means is provided with at least a portion having a flattened cross section in the path of said fibers conveyed by said airstream, a fiber supply conduit disposed between said fiber-separating means and the inside of said rotor, and means for controlling the speed of said airstream to be at a maximum at a position within said fiber-separating means, said position being spaced downstream from a nip point of said fiber supply device at a distance L defined as 2/3 1 L l wherein l represents the average fiber length of said fibers.
Claim 10
Dependent Claim
219 words
In a spinning apparatus comprising a fiber supply device utilizing an airstream for conveying a bundle of fibers supplied from a supply source, while shredding said bundle of fibers into individual fibers; a spinning rotor for accumulating said individual fibers supplied from said fiber supply device upon an inside wall of said rotor while rotating at high speed, said rotor provided with an aperture for taking out yarn produced therein, means for stripping said accumulated fibers from said inside wall of said rotor while rotating said rotor and taking up produced yarn from said rotating rotor through said aperture; an improvement wherein said fiber-supply device comprises a fiber guide conduit disposed adjacent to said supply source, fiber-separating means having an upstream inlet disposed to receive fibers from a downstream outlet of said fiber guide conduit, a fiber-supply conduit disposed between said fiber-separating means and the inside of said rotor wherein an inside wall of said fiber supply device is coated with polytetrafluoroethylene resin, and means for controlling the speed of said airstream to be at a maximum at a position within said fiber separating means, said position being spaced downstream from a nip point of said fiber supply device at a distance L defined as 2/3 l L l wherein, l represents the average fiber length of said fibers.
Claim 11
Dependent Claim
219 words
In a spinning apparatus comprising a fiber supply device utilizing an airstream for conveying a bundle of fibers supplied from a supply source, while shredding said bundle of fibers into individual fibers; a spinning rotor for accumulating said individual fibers supplied from said fiber supply device upon an inside wall of said rotor while rotating at high speed, said rotor provided with an aperture for taking out yarn produced therein, means for stripping said accumulated fibers from said inside wall of said rotor while rotating said rotor and taking up produced yarn from said rotating rotor through said aperture; an improvement wherein said fiber-supply device comprises a fiber guide conduit disposed adjacent to said supply source, fiber-separating means having an upstream inlet disposed to receive fibers from a downstream outlet of said fiber guide conduit, a fiber-supply conduit disposed between said fiber-separating means and the inside of said rotor wherein an inside wall of said fiber supply device is coated with polytetrafluoroethylene resin, and means for controlling the speed of said airstream to be at a maximum at a position within said fiber separating means, said position being spaced downstream from a nip point of said fiber supply device at a distance L defined as 2/3 l L l wherein, l represents the average fiber length of said fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |