US3894135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stretching a cable of polyester threads
Assignee: LL Plant Engineering AG
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Filing: 1974-08-01
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Granted: 1975-07-08
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Expires: 1994-08-01
Abstract
Abstract Improved stretching process for polyester cables wherein the penultimate roller of an inlet roller mechanism is immersed in a bath maintained at a temperature of 40*-65*C and the last roller of the mechanism is higher than the penultimate roller and is maintained at a temperature 3*-18*C higher than the immersion bath. Further the angle between vertical and the cable as it rises to the last roller is less than 55*. The resultant cables have a low percentage unstretched fibers and, as a consequence, have a low percentage dyeing defects.
Inventors
- 👤 Karlheinz Riggert
- 👤 Willy Zahn
- 👤 Bernhard Jantzen
- 👤 Rolf Sander
- 👤 Dietmar Wandel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D02J1/221; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
207 words
IN A PROCESS FOR STRETCHING A CABLE OF POLYESTER THREADS, BETWEEN AN INLET ROLLER MECHANISM COMPRISING A PLURALITY OF ROLLERS AND FIRST STRETCHING ROLLER MECHANISM, IN WHICH THE STRETCHING POINT IS FORMED AT THE LAST ROLLER OF THE INLET ROLLER MECHANISM THE IMPROVEMENT WHICH COMPRISES: A. A PASSING THE CABLE WHILE ON THE PENULTIMATE ROLLER OF THE INLET ROLLER MECHANISM THROUGH IMMERSION BATH MAINTAINED AT A TEMPERATURE OF 40* TO 65*C: B. MAINTAINING THE LAST ROLLER OF THE INLET ROLLER MECHANISM BATH: AT A TEMPERATURE 3* TO 18*C HIGHER THAN HE IMMERSION C. POSITIONING THE LAST ROLLER HIGHER THAN THE PENULTIMATE ROLLER WITH THE ANGLE BETWEEN VERTICAL AND THE CABLE AS IT PRISES FROM THE PENULTIMATE ROLLER TO THE LAST ROLLER BEING LESS THAN 55* TO REMOVE FLUID ROM THE IMMERSION BATH ON THE CABLE: D. MAINTAINING A SHORT RESIDENCE TIME OF LESS THAN 3 SECONDS FOR THE CABLE BETWEEN THE EXIT POINT OF THE CABLE FROM THE IMMERSION BATH AND THE BEGINNING OF THE STRETCHING OF THE CABLE AT THE LAST ROLLER AND E. STRETCHING THE CABLE IN A STRETCHING ZONE IN THE ABSENCE OF THE ADDITION OF WATER AT A RATIO OF 1:25 TO 1:6 TO PRODUCE A CABLE WITH A LOW PERCENTAGE UNSTRETCHED FIBRES.
Claim 2
Dependent Claim
207 words
IN A PROCESS FOR STRETCHING A CABLE OF POLYESTER THREADS, BETWEEN AN INLET ROLLER MECHANISM COMPRISING A PLURALITY OF ROLLERS AND FIRST STRETCHING ROLLER MECHANISM, IN WHICH THE STRETCHING POINT IS FORMED AT THE LAST ROLLER OF THE INLET ROLLER MECHANISM THE IMPROVEMENT WHICH COMPRISES: A. A PASSING THE CABLE WHILE ON THE PENULTIMATE ROLLER OF THE INLET ROLLER MECHANISM THROUGH IMMERSION BATH MAINTAINED AT A TEMPERATURE OF 40* TO 65*C: B. MAINTAINING THE LAST ROLLER OF THE INLET ROLLER MECHANISM BATH: AT A TEMPERATURE 3* TO 18*C HIGHER THAN HE IMMERSION C. POSITIONING THE LAST ROLLER HIGHER THAN THE PENULTIMATE ROLLER WITH THE ANGLE BETWEEN VERTICAL AND THE CABLE AS IT PRISES FROM THE PENULTIMATE ROLLER TO THE LAST ROLLER BEING LESS THAN 55* TO REMOVE FLUID ROM THE IMMERSION BATH ON THE CABLE: D. MAINTAINING A SHORT RESIDENCE TIME OF LESS THAN 3 SECONDS FOR THE CABLE BETWEEN THE EXIT POINT OF THE CABLE FROM THE IMMERSION BATH AND THE BEGINNING OF THE STRETCHING OF THE CABLE AT THE LAST ROLLER AND E. STRETCHING THE CABLE IN A STRETCHING ZONE IN THE ABSENCE OF THE ADDITION OF WATER AT A RATIO OF 1:25 TO 1:6 TO PRODUCE A CABLE WITH A LOW PERCENTAGE UNSTRETCHED FIBRES.
Claim 3
Dependent Claim
40 words
An improvement according to claim 1, wherein the cable is heated in the first stretching roller mechanism to a temperature between 30* and 85*C, and is after-stretched between the fist stretching roller mechanism and a subsequent, second stretching roller mechanism.
Claim 4
Dependent Claim
18 words
An improvement according to claim 2, wherein the cable is after-stretched at a temperature between 110* and 200*C.
Claim 5
Dependent Claim
18 words
An improvement according to claim 2, wherein the cable is heated to a temperature between 40* and 65*C.
Claim 6
Dependent Claim
64 words
An improvement according to claim 1, wherein the cable, before entering the inlet roller mechanism is passed through a moistening bath to produce a cable containing water and the water carried along with the cable from said bath is removed by squeezing, before the cable enters the immersion bath, to provide a cable having a water content of less than 40 percent by weight.
Claim 7
Dependent Claim
24 words
An improvement according to claim 1, wherein the cable is subsequently stretched in a second stretching zone in the ratio of 1:1.1 to 1:2.0.
Claim 8
Dependent Claim
12 words
An improvement according to claim 1, wherein said polyester is polyethylene terephthalate.
Claim 9
Dependent Claim
25 words
An improvement according to claim 1, wherein the temperature of the last roller is 5* to 12*C higher than the temperature of the immersion bath.
References Cited (Backward Citations)
US2734794A
Cited
US3077004A
Cited
US2918346A
Cited
US3259681A
Cited
US3557273A
Cited
US3567817A
Cited
US3739056A
Cited
US3651198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |