Patent US4846154A successfully refreshed from Google Patents.
Patent US4077197A successfully refreshed from Google Patents.
US4077197A
Expired / Lapsed
US
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Open end spinning
Assignee: Monsanto Co
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Filing: 1976-07-09
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Granted: 1978-03-07
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Expires: 1996-07-09
Abstract
Abstract In an open-end spinning process wherein staple fibers are continuously fed to an air vortex and wherein a yarn tail extends into the vortex whereby the fibers affix themselves to and lengthen the tail, the yarn tail is driven at a faster revolution rate than the tail would be driven by the vortex alone by means of a rotary driven member.
Inventors
- 👤 Woodrow Raleigh Bowden
- 👤 William H. Hills
- 👤 Frank Edward Winner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:56
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A process for forming a yarn, comprising a. forming an air axially stationary vortex spaced from and rotating about an axis; b. continuously feeding staple fibers into said vortex; c. driving a yarn tail in said vortex at a faster revolution rate than said tail would be driven by said vortex alone whereby said fibers affix themselves to and lengthen said yarn tail; and d. continuously withdrawing said yarn from said vortex.
Claim 2
Dependent Claim
72 words
A process for forming a yarn, comprising a. forming an air axially stationary vortex spaced from and rotating about an axis; b. continuously feeding staple fibers into said vortex; c. driving a yarn tail in said vortex at a faster revolution rate than said tail would be driven by said vortex alone whereby said fibers affix themselves to and lengthen said yarn tail; and d. continuously withdrawing said yarn from said vortex.
Claim 3
Dependent Claim
26 words
The process defined in claim 1, wherein said step of driving comprises passing said yarn through a hollow tube rotating about the axis of said vortex.
Claim 4
Dependent Claim
17 words
The process defined in claim 2, wherein said hollow tube comprises an abutment for driving said yarn.
Claim 5
Dependent Claim
18 words
The process defined in claim 2, wherein said hollow tube comprises a frictional surface for driving said yarn.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |