Patent US3905076A successfully refreshed from Google Patents.
US3905076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing apparatus
Assignee: Celanese Corp
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Filing: 1973-02-16
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Granted: 1975-09-16
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Expires: 1993-02-16
Abstract
Abstract An apparatus and method is disclosed and claimed for increasing the capability of a standard draw frame comprised of at least two rolls, by utilizing at least one other adjacent draw frame in conjunction with the first draw frame to effect a greater number of stretch and/or relax stages than there are rolls in the individual draw frame. The product produced by this method and apparatus is a heat stable uniform filament yarn of uniform shrinkage for use as sewing thread and the like.
Inventors
- 👤 Dennis K Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:34
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
180 words
In a multiple yarn drawing apparatus comprising a plurality of adjacent draw frames of at least two rolls, said two rolls being a feed roll and a draw roll, said apparatus having means for separately feeding individual yarns to said feed rolls of the separate rdraw frames, said draw frames having means for directing said separately fed individual yarns to said draw rolls of said separate draw frames and having means for collecting the drawn yarns, the improvement comprising utilizing said rolls to effect a draw frame of n rolls + x rolls, wherein n is an integer of from two to about four and represents the actual number of rolls in each draw frame and x is an integer having a value of from one to about four, said improvement providing means for directing at least two yarns, being fed to separate adjacent draw frames, from separate feed rolls to a single draw roll, means for directing said separate yarns from said single draw roll to at least one other single draw roll located in a second draw frame.
Claim 2
Dependent Claim
180 words
In a multiple yarn drawing apparatus comprising a plurality of adjacent draw frames of at least two rolls, said two rolls being a feed roll and a draw roll, said apparatus having means for separately feeding individual yarns to said feed rolls of the separate rdraw frames, said draw frames having means for directing said separately fed individual yarns to said draw rolls of said separate draw frames and having means for collecting the drawn yarns, the improvement comprising utilizing said rolls to effect a draw frame of n rolls + x rolls, wherein n is an integer of from two to about four and represents the actual number of rolls in each draw frame and x is an integer having a value of from one to about four, said improvement providing means for directing at least two yarns, being fed to separate adjacent draw frames, from separate feed rolls to a single draw roll, means for directing said separate yarns from said single draw roll to at least one other single draw roll located in a second draw frame.
Claim 3
Dependent Claim
11 words
The apparatus of claim 1 wherein said rolls are roll sets.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 Wherein n has a value of two and x has a value of from one to two.
Claim 5
Dependent Claim
30 words
The apparatus of claim 3 wherein said other single draw roll is operated at a lower linear velocity than said single draw roll so as to effect a controlled relaxation.
Claim 6
Dependent Claim
23 words
The apparatus of claim 4 wherein said other single draw roll is of smaller diameter than the diameter of said single draw roll.
Claim 7
Dependent Claim
17 words
The apparatus of claim 4 wherein a gearing arrangement is employed on said other single draw rolls.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |