Patent US4235574A successfully refreshed from Google Patents.
US4235574A
Expired / Lapsed
US
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Spinneret orifice cross-section
Assignee: Eastman Chemical Co
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Filing: 1979-01-17
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Granted: 1980-11-25
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Expires: 1999-01-17
Abstract
Abstract A novel spinneret orifice defines in the plane of a spinneret face an elongated slot formed by a series of repeating parallelograms connected in end-to-end relation together and alternating in off-set relation along the major axis of the elongated slot, each parallelogram having a pair of opposite side walls "a" substantially parallel to the minor axis of the elongated slot and a pair of opposite side walls "b" substantially parallel to the major axis, and wherein a side wall "a" of one parallelogram and the side wall "a" of the adjacent off-set parallelogram lie on a common line and define the angle of the minor axis relative to the major axis of the elongated slot.
Inventors
- 👤 Bobby M. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:52
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A spinneret having formed within and extending through the plane of its face at least one spinneret orifice through which a fiber having an undulating cross-section may be spun, said spinneret orifice defining in said spinneret face plane an elongated slot formed by a series of repeating parallelograms connected in end-to-end relation together and alternating in offset relation along the major axis of said elongated slot, each parallelogram having a pair of opposite side walls "a" substantially parallel to the minor axis of said elongated slot and a pair of opposite side walls "b" substantially parallel to said major axis of said elongated slot, and wherein a side wall "a" of one parallelogram and the side wall "a" of the adjacent off-set parallelogram lie on a common line and define the angle of the minor axis relative to the major axis of said elongated slot.
Claim 2
Dependent Claim
145 words
A spinneret having formed within and extending through the plane of its face at least one spinneret orifice through which a fiber having an undulating cross-section may be spun, said spinneret orifice defining in said spinneret face plane an elongated slot formed by a series of repeating parallelograms connected in end-to-end relation together and alternating in offset relation along the major axis of said elongated slot, each parallelogram having a pair of opposite side walls "a" substantially parallel to the minor axis of said elongated slot and a pair of opposite side walls "b" substantially parallel to said major axis of said elongated slot, and wherein a side wall "a" of one parallelogram and the side wall "a" of the adjacent off-set parallelogram lie on a common line and define the angle of the minor axis relative to the major axis of said elongated slot.
Claim 3
Dependent Claim
65 words
A spinneret as defined in claim 1 and wherein the width of the elongated slot in said spinneret orfice between and connecting adjacent parallelograms has a normalized dimension of one (1) unit, side wall "a" has a normalized dimension ranging from two (2) to four (4) units and side wall "b" has a normalized dimension ranging from one and one-half (11/2) to six (6) units.
Claim 4
Dependent Claim
27 words
A spinneret as defined in claim 1, wherein the number in said spinneret orifice of repeating parallelograms ranges from three (3) to six (6) in the series.
Claim 5
Dependent Claim
31 words
A spinneret as defined in claim 1, wherein in said spinneret face plane each parallelogram has one set of included, opposed angles α and one set of included, opposed angles 180°-α.
Claim 6
Dependent Claim
16 words
A spinneret as defined in claim 4, wherein said angle α ranges from 90° to 135°.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |