Patent US3576058A successfully refreshed from Google Patents.
US3576058A
Expired / Lapsed
US
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Process and apparatus for the continuous compression crimping and setting of a multifilament yarn
Assignee: Glanzstoff AG
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Filing: 1969-04-09
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Granted: 1971-04-27
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Expires: 1989-04-09
Abstract
Abstract Process and apparatus for continuously crimping and heat setting a multifilament yarn in which the yarn is continuously conducted through a series of interconnected and interchangeable tubular passages, first through a restricted acceleration passage by a jet of steam injected through an annular nozzle surrounding the yarn inlet, then into an expansion chamber of substantially larger diameter and having lateral openings for the discharge of the major proportion of the steam, and then into a compression chamber as a tubular extension of the expansion chamber. The improved construction and operation permits the use of saturated steam and provides a crimped yarn with a low moisture content.
Inventors
- 👤 Ernst Berg
- 👤 Rudolf Hess
- 👤 Rudi Wollbeck
- 👤 Wolfgang Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:12
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D02G1/122
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
19 words
A process as claimed in claim 1 wherein the steam jet introduced into said acceleration passageway is saturated steam.
Claim 2
Dependent Claim
23 words
A process as claimed in claim 2 wherein the saturated steam is maintained at a temperature of about 120* C. to 145* C.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1 wherein about 70 percent to 90 percent of the steam flow is withdrawn laterally from said expansion chamber.
Claim 4
Dependent Claim
34 words
A process as claimed in claim 1 wherein the minor proportion of steam flowing through said compression chamber is drawn off laterally at a short distance from the outlet end of said compression chamber.
Claim 5
Dependent Claim
35 words
A process as claimed in claim 1 wherein hot air at a temperature of about 100* C. to 150* C. is injected laterally at a short distance from the outlet end of said compression chamber.
Claim 6
Dependent Claim
174 words
Apparatus for the continuous compression crimping and heat setting of a synthetic thermoplastic multifilament yarn which comprises: an annular steam jet nozzle surrounding a tubular yarn entry passage with means to supply steam to said nozzle; an interchangeable elongated acceleration tube of substantially constant diameter arranged to receive steam and yarn from said nozzle and entry passage for propulsion longitudinally thereof; a separately interchangeable tubular expansion chamber concentrically mounted at the discharge end of said acceleration tube, said expansion chamber having a larger diameter than said acceleration tube and being provided with lateral openings for the discharge of steam therefrom, said openings being arranged at an interval spaced from the inlet side of said expansion chamber of 0.5 to 2 times the diameter of said chamber; a steam discharge line in fluid connection with said expansion chamber through said lateral openings; a tubular extension of said expansion chamber connected thereto and adapted to receive said yarn for compresSion crimping; and means to collect the crimped yarn from the discharge end of said tubular extension.
Claim 7
Dependent Claim
25 words
Apparatus as claimed in claim 7 wherein the diameter of said expansion chamber is approximately 2 to 10 times the diameter of said acceleration tube.
Claim 8
Dependent Claim
26 words
Apparatus as claimed in claim 7 wherein the diameter of said entry passage is about 1.3 to 2.3 times the diameter of the yarn entering therethrough.
Claim 9
Dependent Claim
19 words
Apparatus as claimed in claim 7 wherein the diameter of said expansion chamber is about 4.5 to 7.5 mm.
Claim 10
Dependent Claim
36 words
Apparatus as claimed in claim 7 wherein the ratio of the cross-sectional area of the acceleration tube to the total cross-sectional area of the lateral openings in said expansion chamber is from about 1:3 to 1:60.
Claim 11
Dependent Claim
31 words
Apparatus as claimed in claim 7 wherein at least one of said steam jet nozzle and said tubular extension of the expansion chamber is provided with means for heating the same.
Claim 12
Dependent Claim
38 words
Apparatus as claimed in claim 7 wherein a fluid conduit is arranged at the discharge end of said tubular extension in fluid connection with the crimping chamber formed by said extension through a second set of lateral openings.
Claim 13
Dependent Claim
25 words
Apparatus as claimed in claim 13 wherein the diameter of said expansion chamber is approximately 2 to 10 times the diameter of said acceleration tube.
Claim 14
Dependent Claim
19 words
Apparatus as claimed in claim 14 wherein the diameter of said expansion chamber is about 4.5 to 7.5 mm.
Claim 15
Dependent Claim
22 words
Apparatus as claimed in claim 13 wherein said fluid conduit is connected to means for blowing hot air into said tubular extension.
Claim 16
Dependent Claim
16 words
Apparatus as claimed in claim 13 wherein said fluid conduit is a second steam discharge line.
Claim 17
Dependent Claim
21 words
A process as claimed in claim 1 wherein the yarn being treated has a total yarn size of about 1000-4000 denier.
References Cited (Backward Citations)
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US3296677A
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US3343240A
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US3256582A
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US3303546A
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US3409956A
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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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |