US3774385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines and methods for manufacturing ropes, in particular steel cords
Assignee: Industrie Pirelli SpA
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Filing: 1971-11-19
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Granted: 1973-11-27
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Expires: 1991-11-19
Abstract
Abstract Apparatus and method of manufacturing rope or cord wherein a double-twisting device is used in conjunction with an equalizer in a single apparatus to provide rope or steel cord of the equiverse type.
Inventors
- 👤 M Maderna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:23
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/062; D07B3/00; D07B3/02; D07B3/04; D07B2207/00; D07B2207/20; D07B2207/202
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
An apparatus for making a cord of the equiverse type comprising a plurality of spools for winding a plurality of wires in parallel relationship thereabout; a cylinder disposed about said spools and adapted to be rotated thereabout; said cylinder having a separate opening in its sidewall for passage of each group of wires from each spool to the outside of the cylinder; means adjacent to each spool for looping the wires as they are unwound from the spool and means for guiding the resulting strand of twisted wires from the looping means through one of said openings; means carried externally by the cylinder for guiding the strands and orienting them into a bundle of parallel strands; a bushing having its axis parallel to that of the cylinder but which is stationary with respect to the cylinder for guiding the strands as they are twisted once about each other from the rotating cylinder, an equalizer downstream of the said bushing; and means for winding the resulting cord.
Claim 2
Independent Claim
166 words
An apparatus for making a cord of the equiverse type comprising a plurality of spools for winding a plurality of wires in parallel relationship thereabout; a cylinder disposed about said spools and adapted to be rotated thereabout; said cylinder having a separate opening in its sidewall for passage of each group of wires from each spool to the outside of the cylinder; means adjacent to each spool for looping the wires as they are unwound from the spool and means for guiding the resulting strand of twisted wires from the looping means through one of said openings; means carried externally by the cylinder for guiding the strands and orienting them into a bundle of parallel strands; a bushing having its axis parallel to that of the cylinder but which is stationary with respect to the cylinder for guiding the strands as they are twisted once about each other from the rotating cylinder, an equalizer downstream of the said bushing; and means for winding the resulting cord.
Claim 3
Dependent Claim
135 words
The apparatus of claim 1 wherein said means for guiding the wires from the looping means through one of said openings is a first bushing having its axis parallel to the longitudinal axis of the cylinder and a second bushing in the opening; the means for guiding and orienting the strands carried externally by the cylinder are a pair of circumferentially spaced bushings adjacent to one end of the cylinder, a roller carried by the cylinder at a first end thereof and disposed between the said spaced bushings having its axis perpendicular with the longitudinal axis of the cylinder; the said stationary bushing is disposed at a second end of the cylinder, an equalizer, a capstan and a drum for winding the resulting cord thereabout are disposed in that order downstream of the stationary bushing.
Claim 4
Independent Claim
101 words
A method for forming a cord having a plurality of wire twisted once to form a strand and a plurality of the strands are twisted once in the same sense as the wires are twisted which comprises unwinding a plurality of wires disposed in parallel relationship on a spool, guiding the wires through the sidewall of a cylinder rotating about the spool, disposing the resulting once twisted wires as strands in parallel relationship to form a bundle thereof and passing the strands through a guide means stationary with respect to the cylinder whereby the strands are twisted once into a cord.
Claim 5
Independent Claim
101 words
A method for forming a cord having a plurality of wire twisted once to form a strand and a plurality of the strands are twisted once in the same sense as the wires are twisted which comprises unwinding a plurality of wires disposed in parallel relationship on a spool, guiding the wires through the sidewall of a cylinder rotating about the spool, disposing the resulting once twisted wires as strands in parallel relationship to form a bundle thereof and passing the strands through a guide means stationary with respect to the cylinder whereby the strands are twisted once into a cord.
Claim 6
Dependent Claim
21 words
The method of claim 3 wherein the twisted strands are passed through an equalizer, a capstan and wound on a spool.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |