US3879819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-setting means in a thermoplastic yarn rebound texturizing apparatus
Assignee: Chevron USA Inc
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Filing: 1973-12-28
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Granted: 1975-04-29
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Expires: 1993-12-28
Abstract
Abstract In a bounce crimping appartus for texturizing multi-filament thermoplastic yarn including a yarn texturizing chamber, a means for introducing heated fluid into the yarn texturizing chamber for drawing yarn into the chamber, a foraminous surface transversely positioned across a longitudinal fluid outlet of the yarn texturizing chamber, a J-tube for receiving and heat treating the crimped yarn while maintaining the yarn substantially free from longitudinal tension, the improvement comprising a member positioned between the lateral yarn outlet of the texturizing chamber and the J-tube for directing the yarn into the J-tube substantially along a central longitudinal axis thereof and a generally upright inlet portion of the J-tube cross-sectionally being dimensioned large enough to accommodate a substantial body of yarn to be heat treated and to thereby insure movement of the yarn in a loose substantially untensioned mass downwardly through the interior of the J-tube under the influence of gravity and the inlet portion of said J-tube being concomitantly small enough in cross section to dynamically constrain, against lateral tumbling, a conical pile of incoming yarn at the top of the descending mass of yarn being heat treated with the J-tube.
Inventors
- 👤 Lloyd M Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:31
CPC Classifications
D; D02; D02G; D02G1/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
359 words
In bounce crimping apparatus for texturizing multi-filament thermoplastic yarn including; a yarn texturizing chamber having an inlet, a fluid outlet longitudinally aligned with said inlet, and a lateral yarn outlet, means for introducing a heated fluid into said yarn texturizing chamber for drawing yarn into said chamber, a foraminous surface transversely positioned across said fluid outlet of said chamber, said heated fluid introduced into said chamber for drawing yarn into said chamber further serving to hurl the yarn against said foraminous surface to axially compress and crimp the yarn filaments and rebound the yarn through said lateral outlet of said yarn texturizing chamber, and means for heat treating the crimped yarn to heat set the yarn while maintaining the yarn substantially free from longitudinal tension, said means for heat treating including a J-tube into one end of which yarn is fed substantially continuously and from the other end of which yarn is withdrawn substantially continuously and within which a body of yarn moves slowly from one end to the other to permit heat treatment thereof on a continuous basis, the improvement comprising: means positioned between said lateral yarn outlet of said texturizing chamber and said J-tube for directing the yarn from said texturizing chamber into an inlet end of said Jtube substantially along a central longitudinal axis thereof; and a generally upright inlet portion of said J-tube having a defined internal cross-sectional area selected in accordance with the size of the yarn being processed such that approximately 0.5 to 0.9 square inches of tubular crosssectional area are provided for each 100 denier of yarn being texturized, wherein said inlet portion of said J-tube is large enough in cross section for accommodating a substantial body of yarn to be heat treated and thereby insure movement of the yarn in a loose substantially untensioned mass downwardly through the interior of the J-tube under the influence of gravity and wherein said inlet portion of said J-tube is concomitantly small enough in cross section so as to dynamically constrain against lateral tumbling a conical pile of incoming yarn at the top of the descending mass of yarn being heat treated with the tube.
Claim 2
Dependent Claim
359 words
In bounce crimping apparatus for texturizing multi-filament thermoplastic yarn including; a yarn texturizing chamber having an inlet, a fluid outlet longitudinally aligned with said inlet, and a lateral yarn outlet, means for introducing a heated fluid into said yarn texturizing chamber for drawing yarn into said chamber, a foraminous surface transversely positioned across said fluid outlet of said chamber, said heated fluid introduced into said chamber for drawing yarn into said chamber further serving to hurl the yarn against said foraminous surface to axially compress and crimp the yarn filaments and rebound the yarn through said lateral outlet of said yarn texturizing chamber, and means for heat treating the crimped yarn to heat set the yarn while maintaining the yarn substantially free from longitudinal tension, said means for heat treating including a J-tube into one end of which yarn is fed substantially continuously and from the other end of which yarn is withdrawn substantially continuously and within which a body of yarn moves slowly from one end to the other to permit heat treatment thereof on a continuous basis, the improvement comprising: means positioned between said lateral yarn outlet of said texturizing chamber and said J-tube for directing the yarn from said texturizing chamber into an inlet end of said Jtube substantially along a central longitudinal axis thereof; and a generally upright inlet portion of said J-tube having a defined internal cross-sectional area selected in accordance with the size of the yarn being processed such that approximately 0.5 to 0.9 square inches of tubular crosssectional area are provided for each 100 denier of yarn being texturized, wherein said inlet portion of said J-tube is large enough in cross section for accommodating a substantial body of yarn to be heat treated and thereby insure movement of the yarn in a loose substantially untensioned mass downwardly through the interior of the J-tube under the influence of gravity and wherein said inlet portion of said J-tube is concomitantly small enough in cross section so as to dynamically constrain against lateral tumbling a conical pile of incoming yarn at the top of the descending mass of yarn being heat treated with the tube.
Claim 3
Dependent Claim
106 words
A bounce crimping apparatus for texturizing multi-filament thermoplastic yarn as defined in claim 1 wherein the improvement further comprises: a first generally upright straight section of said J-tube for heating yarn passing therethrough and a second generally arcuate section of said J-tube positioned downstream of said straight section for cooling yarn passing therethrough, said first and second sections being fashioned from tubular members each having a circular cross section and wherein an outlet end of said first section is fitted into and an inlet end of said second section and the internal cross-sectional areas at the junction of said first and second sections are approximately equal.
Claim 4
Dependent Claim
245 words
In bounce crimping apparatus for texturizing multi-filament thermoplastic yarn including; a yarn texturizing chamber having an inlet, a fluid outlet longitudinally aligned with said inlet and a lateral yarn outlet, means for introducing a heated fluid into said yarn texturizing chamber for drawing yarn into said chamber, a foraminous surface transversely positioned across said fluid outlet of said chamber, said heating fluid introduced Into said yarn chamber for drawing yarn into said chamber further serving to hurl the yarn against said foraminous surface to axially compress and crimp the yarn filaments and rebound the yarn through said lateral outlet of said yarn texturizing chamber, J-tube means having an inlet end positioned beneath said yarn texturizing chamber to receive said crimped yarn for heat treating said yarn within said J-tube means while maintaining the yarn substantially free from longitudinal tension, and take-up means for withdrawing the crimped yarn from a discharge end of said J-tube means, the improvement comprising: housing means coaxially positioned about at least a portion of said J-tube means for forming a heating fluid plenum chamber between said J-tube means and said housing means, means connected to said housing means for introducing heated fluid into said plenum chamber, and aperture means fashioned through a wall portion of said J-tube means for directly introducing the heated fluid from said plenum chamber into said J-tube means to raise the temperature of crimped yarn therein without obstructing movement of the crimped yarn through said J-tube means.
Claim 5
Dependent Claim
245 words
In bounce crimping apparatus for texturizing multi-filament thermoplastic yarn including; a yarn texturizing chamber having an inlet, a fluid outlet longitudinally aligned with said inlet and a lateral yarn outlet, means for introducing a heated fluid into said yarn texturizing chamber for drawing yarn into said chamber, a foraminous surface transversely positioned across said fluid outlet of said chamber, said heating fluid introduced Into said yarn chamber for drawing yarn into said chamber further serving to hurl the yarn against said foraminous surface to axially compress and crimp the yarn filaments and rebound the yarn through said lateral outlet of said yarn texturizing chamber, J-tube means having an inlet end positioned beneath said yarn texturizing chamber to receive said crimped yarn for heat treating said yarn within said J-tube means while maintaining the yarn substantially free from longitudinal tension, and take-up means for withdrawing the crimped yarn from a discharge end of said J-tube means, the improvement comprising: housing means coaxially positioned about at least a portion of said J-tube means for forming a heating fluid plenum chamber between said J-tube means and said housing means, means connected to said housing means for introducing heated fluid into said plenum chamber, and aperture means fashioned through a wall portion of said J-tube means for directly introducing the heated fluid from said plenum chamber into said J-tube means to raise the temperature of crimped yarn therein without obstructing movement of the crimped yarn through said J-tube means.
Claim 6
Dependent Claim
110 words
A bounce crimping apparatus for texturizing mutli-filament thermoplastic yarn as defined in claim 3 wherein the improvement further comprises: second housing means connected to said J-tube means downstream from said heating fluid plenum chamber for forming a cooling fluid plenum chamber between said J-tube means and said housing means; means connected to said second housing means for introducing cooling fluid into said second housing means; and aperture means fashioned through a wall portion of said J-tube means for introducing cooling fluid from said second plenum chamber into said J-tube means for lowering the temperature of the crimped yarn therein without obstructing movement of the crimped yarn through said J-tube means.
Claim 7
Dependent Claim
126 words
A bounce crimping apparatus for texturizing multi-filament thermoplastic yarn as defined in claim 3 and including switching means for so controlling the speed of said take-up means as to dynamically maintain a predetermined desirable quantity of yarn within the J-tube, said switching means comprising: light projecting means connected to said J-tube means at the inlet end thereof for projecting a beam of light through said J-tube means, light sensitive receiving means connected to the upper end of said J-tube means in a posture opposed to said light projecting means for sensing the presence of light projected from said light projecting means through said J-tube means except when crimped yarn deposited within said receiving means piles up sufficiently to block light projected from said light projecting means.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |