Patent US4068460A successfully refreshed from Google Patents.
US4068460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn process
Assignee: Celanese Corp
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Filing: 1976-10-04
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Granted: 1978-01-17
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Expires: 1996-10-04
Abstract
Abstract A process for disc type friction false twisting, the disc having an inorganic yarn-engaging surface, with a critical surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch and a hardness greater than 975 on the Knoop 100 scale. Preferably, the apparatus is an intermeshing disc friction false twist apparatus.
Inventors
- 👤 Melvyn Robert Fischbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:24
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/082
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
87 words
In a process for producing false twist crimped multifilament yarn, wherein yarn is fed over the outer periphery of a rotating disc, the improvement comprising causing said yarn traveling at running speeds of at least 1000 feet per minute to pass over a disc, the yarn contacting surface of which is inorganic with a hardness of greater than 975 on the Knoop 100 scale, and a surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch.
Claim 2
Dependent Claim
87 words
In a process for producing false twist crimped multifilament yarn, wherein yarn is fed over the outer periphery of a rotating disc, the improvement comprising causing said yarn traveling at running speeds of at least 1000 feet per minute to pass over a disc, the yarn contacting surface of which is inorganic with a hardness of greater than 975 on the Knoop 100 scale, and a surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch.
Claim 3
Dependent Claim
40 words
The process of claim 1 wherein said yarn is fed between a plurality of said discs arranged so as to intermesh and be disposed in coaxial groups of three on three shaft members, said shaft members being in parallel alignment.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein said surface texture is more than 175 and less than 350 peaks of at least 50 microinches in height per linear inch.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said surface is a refractory surface.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein said surface is a refractory surface disposed on a metal disc.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein said surface is a Cr 2 O 3 surface.
Claim 8
Dependent Claim
98 words
In a process for producing false twist crimped multifilament yarn wherein yarn is fed over the outer periphery of a rotating disc, the improvement comprising causing said yarn traveling at running speeds of at least 1000 feet per minute to pass over a disc, the yarn contacting surface of which is inorganic with a hardness of greater than 975 on the Knoop 100 scale, a coefficient of friction sufficient to grip and torque said yarn and a surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch.
Claim 9
Dependent Claim
98 words
In a process for producing false twist crimped multifilament yarn wherein yarn is fed over the outer periphery of a rotating disc, the improvement comprising causing said yarn traveling at running speeds of at least 1000 feet per minute to pass over a disc, the yarn contacting surface of which is inorganic with a hardness of greater than 975 on the Knoop 100 scale, a coefficient of friction sufficient to grip and torque said yarn and a surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch.
Claim 10
Dependent Claim
39 words
The process of claim 7 wherein said yarn is fed between a plurality of discs arranged so as to intermesh and be disposed in coaxial groups of three on three shaft members, said shaft members being in parallel alignment.
Claim 11
Dependent Claim
28 words
The process of claim 7 wherein said surface texture is more than 175 and less than 350 peaks of at least 50 microinches in height per linear inch.
Claim 12
Dependent Claim
12 words
The process of claim 7 wherein said surface is a refractory surface.
Claim 13
Dependent Claim
17 words
The process of claim 7 wherein said surface is a refractory surface disposed on a metal disc.
Claim 14
Dependent Claim
15 words
The process of claim 7 wherein said surface is a Cr 2 O 3 surface.
Claim 15
Dependent Claim
96 words
In a process for producing false twist crimped multifilament yarn, wherein yarn is fed over the outer periphery of a rotating disc, the improvement comprising causing said yarn traveling at running speeds of at least 1000 feet per minute to pass over a disc, the yarn contacting surface of which is inorganic with a hardness of greater than 975 on the Knoop 100 scale, a coefficient of friction of not less than 0.28 and a surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch.
Claim 16
Dependent Claim
96 words
In a process for producing false twist crimped multifilament yarn, wherein yarn is fed over the outer periphery of a rotating disc, the improvement comprising causing said yarn traveling at running speeds of at least 1000 feet per minute to pass over a disc, the yarn contacting surface of which is inorganic with a hardness of greater than 975 on the Knoop 100 scale, a coefficient of friction of not less than 0.28 and a surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch.
Claim 17
Dependent Claim
15 words
The process of claim 8 wherein said coefficient of friction is not less than 0.31.
Claim 18
Dependent Claim
40 words
The process of claim 8 wherein said yarn is fed between a plurality of said discs arranged so as to intermesh and be disposed in coaxial groups of three on three shaft members, said shaft members being in parallel alignment.
Claim 19
Dependent Claim
28 words
The process of claim 13 wherein said surface texture is more than 175 and less than 350 peaks of at least 50 microinches in height per linear inch.
Claim 20
Dependent Claim
12 words
The process of claim 13 wherein said surface is a refractory surface.
Claim 21
Dependent Claim
17 words
The process of claim 13 wherein said surface is a refractory surface disposed on a metal disc.
Claim 22
Dependent Claim
15 words
The process of claim 13 wherein said surface is a Cr 2 O 3 surface.
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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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |