US3791120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating of endless filaments, yarns or the like
Assignee: Heberlein and Co AG
•
Filing: 1972-09-21
•
Granted: 1974-02-12
•
Expires: 1992-09-21
Abstract
Abstract Apparatus for heating yarns of indefinite continuous length as the yarn advances longitudinally comprises an arc discharge device positioned in the vicinity of the yarn or in contact therewith so that the arc follows the yarn or passes through same. Means may also be provided to moisten the yarn with a conductive fluid before the arc is applied.
Inventors
- 👤 L Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:12
CPC Classifications
D; D02; D02J; D02J13/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
29 words
Apparatus for heating yarns of indefinite continuous length, characterized by means for advancing the yarn longitudinally, and means for providing an arc discharge adjacent the path of the yarn.
Claim 2
Dependent Claim
29 words
Apparatus for heating yarns of indefinite continuous length, characterized by means for advancing the yarn longitudinally, and means for providing an arc discharge adjacent the path of the yarn.
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1, wherein the arc discharge is provided in advance of false-twist means whereby the yarn is heat-set in twisted condition.
Claim 4
Dependent Claim
29 words
Apparatus according to claim 1, characterized in that at least one pair of electrodes is arranged immediately adjacent the yarn, that the arc extends in parallel with the yarn.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 3, characterized in that the electrodes are so spaced from the yarn that the arc passes lengthwise through the yarn.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 3, characterized in that in the distance through which the yarn passes, and in advance of the electrodes, means are provided for moistening the yarn with a conductive liquid.
Claim 7
Dependent Claim
15 words
Apparatus according to claim 5, characterized in that the moistening means is a fog chamber.
Claim 8
Dependent Claim
26 words
Apparatus according to claim 5, characterized in that the moistening means is a rotating roller in contact with the yarn and which yields a conductive liquid.
Claim 9
Dependent Claim
22 words
Apparatus according to claim 5, characterized in that the moistening device comprises a wick transferring the liquid into contact with the yarn.
Claim 10
Dependent Claim
25 words
Apparatus according to claim 5, characterized in that the moistening device comprises capillaries in contact with the yarn for transferring the liquid to the yarn.
Claim 11
Dependent Claim
22 words
Apparatus according to claim 3, characterized in that the electrodes are in the form of rings through which the yarn is passed.
Claim 12
Dependent Claim
29 words
Apparatus according to claim 1, characterized in that the means for providing the arc discharge are so arranged that the arc extends transversely with respect to the yarn movement.
Claim 13
Dependent Claim
22 words
Apparatus according to claim 1, characterized in that control means are provided for interrupting the arc discharge in regular or irregular intervals.
Claim 14
Dependent Claim
31 words
Method of heating yarn comprising, advancing yarn longitudinally and striking an arc in the immediate vicinity of the yarn so as to heat same by the arc to a desired temperature.
Claim 15
Dependent Claim
31 words
Method of heating yarn comprising, advancing yarn longitudinally and striking an arc in the immediate vicinity of the yarn so as to heat same by the arc to a desired temperature.
Claim 16
Dependent Claim
20 words
Method according to claim 13, wherein the arc passes transversely of the yarn and the yarn passes through the arc.
Claim 17
Dependent Claim
20 words
Method according to claim 13, wherein the arc is disposed parallel to and along a length of the advancing yarn.
Claim 18
Dependent Claim
19 words
Method according to claim 13, wherein the yarn is treated with a conductive fluid before the arc is applied.
References Cited (Backward Citations)
US2993333A
Cited
US1557730A
Cited
US2956393A
Cited
US3093955A
Cited
US3343207A
Cited
US3483374A
Cited
US3400528A
Cited
US3732395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |