Patent US3763669A successfully refreshed from Google Patents.
US3763669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for bulking yarn
Assignee: ROSENKRANZ AND CO GmbH
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Filing: 1971-08-06
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Granted: 1973-10-09
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Expires: 1991-08-06
Abstract
Abstract A system for heat-treating a filament, especially for the bulking of yarn in which a loop of the filament is suspended in a hanging condition between a feed point and a take-up point by advancing the filament at said feed point at a rate greater than that at which the filament is withdrawn at said take-up point. The loop is enclosed in a vertical tube substantially out of contact with the vertical walls thereof and the supply of filament within said tube is held substantially constant by controlling the relative speed at which the filament is fed and withdrawn at said points.
Inventors
- 👤 K Bous
- 👤 D Rosenkranz
- 👤 K Gorgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:15
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/20; D02G1/205
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
111 words
An apparatus for the continuous heat treatment of a textile filament, especially for the bulking of yarn, comprising: a feed device for advancing a filament and take-up device for withdrawing of filament spaced apart to form a downwardly hanging free loop; a vertically extending tubular treatment chamber surrounding said loop individually and receiving only a single filament loop; means for heating the single loop within said tubular chamber; means for controlling the speed of at least one of said devices for regulating the length of the single loop in said chamber; and suction means communicating with said tubular chamber at a lower end thereof for drawing fluid through said tubular chamber.
Claim 2
Independent Claim
111 words
An apparatus for the continuous heat treatment of a textile filament, especially for the bulking of yarn, comprising: a feed device for advancing a filament and take-up device for withdrawing of filament spaced apart to form a downwardly hanging free loop; a vertically extending tubular treatment chamber surrounding said loop individually and receiving only a single filament loop; means for heating the single loop within said tubular chamber; means for controlling the speed of at least one of said devices for regulating the length of the single loop in said chamber; and suction means communicating with said tubular chamber at a lower end thereof for drawing fluid through said tubular chamber.
Claim 3
Dependent Claim
28 words
The apparatus defined in claim 1 wherein the last-mentioned means is a suction box common to a plurality of such chambers each receiving a single such filament loop.
Claim 4
Dependent Claim
33 words
The apparatus defined in claim 1, further comprising a perforated support surface below said loop and traversed by said fluid whereby said fluid temporarily retains filament of said loop on said support surface.
Claim 5
Dependent Claim
15 words
The apparatus defined in claim 3 wherein said support surface is a moving perforated band.
Claim 6
Dependent Claim
30 words
The apparatus defined in claim 1 wherein the means for controlling the speed includes a sensor responsive to the bight of said loop for controlling said one of said devices.
Claim 7
Dependent Claim
15 words
The apparatus defined in claim 5 wherein said sensor is a finger engaging said loop.
Claim 8
Dependent Claim
24 words
The apparatus defined in claim 5 wherein said sensor is a photoelectric means across said chamber and generating a beam intercepted by said loop.
Claim 9
Dependent Claim
35 words
The apparatus defined in claim 5 wherein said chamber is provided with a perforated support surface collecting a portion of said loop and said sensor is responsive to suction pressure below said perforated support surface.
Claim 10
Dependent Claim
41 words
The apparatus defined in claim 5 wherein said chamber is provided with a perforated support surface collecting a portion of the filament of said loop and said sensor is a finger responsive to the accumulation of said portion of said filament.
Claim 11
Dependent Claim
22 words
The apparatus defined in claim 1, further comprising a duct extending downwardly into said tube, said filament being guided through said duct.
Claim 12
Dependent Claim
20 words
The apparatus defined in claim 10, further comprising means for introducing a heating fluid into said tube through said duct.
Claim 13
Dependent Claim
33 words
The apparatus defined in claim 10 wherein said chamber is provided with a perforated supporting surface accumulating a portion of said loop, further comprising means for oscillating said duct across said supporting surface.
Claim 14
Dependent Claim
21 words
The apparatus defined in claim 10, further comprising another duct leading from said chamber and guiding said filament from said loop.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |