US3834150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming twisted filamentary material
Assignee: Dunlop Ltd
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Filing: 1973-01-30
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Granted: 1974-09-10
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Expires: 1993-01-30
Abstract
Abstract An apparatus and method of forming a twisted yarn and a doubled cord in which yarn twisting is carried out by feeding a yarn by means of a feed device into a rotating hollow member, temporarily storing the yarn and subsequently reversing the direction of the feed device to remove the yarn and give it further twist. Two or more yarns may then be folded together to form a cord and this is preferably carried out whilst passing the twisted yarns into a further rotating member, of which the following is a Specification.
Inventors
- 👤 R Ottewell
- 👤 P Moring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:31
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/08; D01H2700/00; D01H2700/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A method of forming a twisted yarn comprising drawing a yarn from a supply member by means of a feed device, feeding the yarn into an open end of a rotating hollow member, temporarily storing said yarn on an inside surface of the hollow member in a twisted condition and subsequently reversing the direction of the feed of said device whilst an end of the yarn is still connected to it so that the yarn is removed from the hollow member and is given further twist.
Claim 2
Independent Claim
86 words
A method of forming a twisted yarn comprising drawing a yarn from a supply member by means of a feed device, feeding the yarn into an open end of a rotating hollow member, temporarily storing said yarn on an inside surface of the hollow member in a twisted condition and subsequently reversing the direction of the feed of said device whilst an end of the yarn is still connected to it so that the yarn is removed from the hollow member and is given further twist.
Claim 3
Dependent Claim
74 words
A method as in claim 1 wherein the yarn is passed into the hollow member by means of a traverse tube mounted such that the end of the traverse tube from which the yarn issues is substantially at the axis of the hollow member and the end of the tube is moved in the axial direction of the hollow member so that the yarn is distributed on the inside wall of the hollow member.
Claim 4
Dependent Claim
17 words
A method as in claim 1 wherein the yarn is re-wound on to the same supply member.
Claim 5
Dependent Claim
37 words
A method as in claim 3 wherein several yarns are taken from a beam and each yarn is twisted and returned to its position on the beam by reversing the beam direction after loading the hollow member.
Claim 6
Dependent Claim
54 words
A method of forming a cord comprising taking at least two yarns from supply members, and applying the method of claim 1 to each of the said yarns to impart twist into the yarns, bringing the yarns together to cause folding thereof into a cord, and winding the cord on to a storage member.
Claim 7
Dependent Claim
83 words
A method as in claim 5 wherein the twisted yarns are passed from the traverse tube to an additional feed device which feeds the yarns into the open end of an additional rotating hollow member, temporarily storing the folded cord so formed on an inside surface of the hollow member, subsequently reversing the direction of the additional feed device so that the cord is taken from the hollow member and is given twist, and winding the twisted cord on to the storage member.
Claim 8
Dependent Claim
22 words
A method as in claim 1 wherein the yarn is subjected to at least one treatment operation before entering the feed device.
Claim 9
Dependent Claim
24 words
A method as in claim 6 wherein the yarn is subjected to a treatment operation immediately prior to winding on to the storage member.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |