Patent US3768355A successfully refreshed from Google Patents.
US3768355A
Expired / Lapsed
US
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Apparatus for cutting tow into staple fiber
Assignee: MINIFIBERS Inc
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Filing: 1969-02-20
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Granted: 1973-10-30
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Expires: 1989-02-20
Abstract
Abstract An apparatus for cutting staple fibers to predetermine accurate lengths from tow or ropes comprising a power operated rotatable hollow shaft providing a passageway for the tow or rope, an exit opening for the tow, plurality of stationary knives positioned adjacent said exit opening whereby to impinge the front end of the tow against the knives to thereby cut the tow into fibers of uniform length.
Inventors
- 👤 E Farmer
- 👤 G Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:57
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/02; D01G1/04; Y; Y10; Y10S; Y10S83/00; Y10S83/913; Y10T; Y10T83/00; Y10T83/647; Y10T83/6473; Y10T83/788
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
An apparatus for cutting staple fibers, comprising a power operated rotatable shaft, a passageway formed in said shaft, said passageway having its inlet at one end of the shaft and having its outlet extending through the circumference of said shaft, means for passing tow through said passageway and out of the outlet, a plurality of stationary knives axially supported about said rotating shaft with the sharp edges of said knives closely adjacent said outlet end of the passageway, said shaft having a raised land therein through which the outlet passageway extends, said land having side surfaces thereon, a pair of journals surrounding said shaft on each side of said raised land, the inward ends of said journals bearing against said side surfaces of the land, said journals having slots formed therein through which the sharp edges of the knives extend, and means for holding said knives in said slots.
Claim 2
Independent Claim
149 words
An apparatus for cutting staple fibers, comprising a power operated rotatable shaft, a passageway formed in said shaft, said passageway having its inlet at one end of the shaft and having its outlet extending through the circumference of said shaft, means for passing tow through said passageway and out of the outlet, a plurality of stationary knives axially supported about said rotating shaft with the sharp edges of said knives closely adjacent said outlet end of the passageway, said shaft having a raised land therein through which the outlet passageway extends, said land having side surfaces thereon, a pair of journals surrounding said shaft on each side of said raised land, the inward ends of said journals bearing against said side surfaces of the land, said journals having slots formed therein through which the sharp edges of the knives extend, and means for holding said knives in said slots.
Claim 3
Dependent Claim
18 words
An apparatus as defined in claim 1, said knives being longitudinally adjustable with respect to the outlet passage.
Claim 4
Dependent Claim
31 words
An apparatus as defined in claim 1, lubricant reservoirs adjacent the outer ends of the journals, and seals for preventing the escape of lubricant at the outer ends of the journals.
Claim 5
Dependent Claim
15 words
An apparatus as defined in claim 1, said slots in said journals being angularly disposed.
References Cited (Backward Citations)
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Cited
US2278662A
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US2296253A
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US2381240A
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US2607418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |