Patent US4332131A successfully refreshed from Google Patents.
US4332131A
Expired / Lapsed
US
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Apparatus and process of manufacturing a metal cord
Assignee: SODETAL
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Filing: 1981-06-10
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Granted: 1982-06-01
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Expires: 2001-06-10
Abstract
Abstract A compact single-strand cord consisting of at least nine single wires of the same diameter twisted together in the same direction and with the same pitch, characterized in that, in cross-section, the cord has the shape of a compact stack of polygonal, preferably hexagonal, contour. The cord can be used for reinforcing rubber articles or elastomeric articles, in particular for reinforcing tires. The method of manufacture of the cord includes unwinding the wires from coils each consisting of a single wire. The wires are delivered by positive slip-drive rollers to a means for regrouping and a strand-laying means. The wires are assembled in a grid and die and twisted by an assembling twister. The wires are then guided through a double twist path loop, overtwisted, straightened and collected on a capstan. The machine for performing the process includes an unwinding means in the form of a plurality of feed bobbins, a positive slip-drive roller system, means for regrouping the advanced wires including a grid and a die, a revolving assembling twister and a spindle means including a loop and stationary cradle carrying an overtwisted, straightener and capstan for collecting the cord.
Inventors
- 👤 Alain Palsky
- 👤 Guy Vella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:27
CPC Classifications
D; D07; D07B; D07B3/00; D07B3/08; D07B3/10; B; B60; B60C; B60C9/00; B60C9/0007; D07B1/00; D07B1/06; D07B1/0606; D07B1/062; D07B1/0626; D07B1/0633; D07B2201/00; D07B2201/20; D07B2201/2015; D07B2201/2016; D07B2201/2018; D07B2201/2024; D07B2201/2027; D07B2201/2028; D07B2207/00; D07B2207/20; D07B2207/204; D07B2207/205; D07B2207/209; D07B2207/40; D07B2207/4072; Y; Y10; Y10S; Y10S57/00; Y10S57/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A single strand steel cord for reinforcing rubber articles such as tires, said cord comprising from nine to 52 single steel wires of the same diameter, twisted together in the same direction and with the same pitch, said twisted wires having a cross-sectional shape of a compact stack of polygonal contour, said cross-sectional shape being uniform along the entire length of the cord, said wires being disposed in at least one concentric layer of outer wires arranged around a central basic structure of 1, 2, 3 or 4 inner wires, all of the wires of said central basic structure and of each concentric layer, except the outer most concentric layer, tangentially contacting six adjacent wires, the wires in the outer most concentric layer, between the wires forming the corners of said polygonal contour, tangentially contacting four adjacent wires, and the wires forming said corners tangentially contacting three adjacent wires, whereby the mechanical properties of said cord, including breaking load, rigidity and fatigue, are uniform in the lengthwise direction.
Claim 2
Dependent Claim
168 words
A single strand steel cord for reinforcing rubber articles such as tires, said cord comprising from nine to 52 single steel wires of the same diameter, twisted together in the same direction and with the same pitch, said twisted wires having a cross-sectional shape of a compact stack of polygonal contour, said cross-sectional shape being uniform along the entire length of the cord, said wires being disposed in at least one concentric layer of outer wires arranged around a central basic structure of 1, 2, 3 or 4 inner wires, all of the wires of said central basic structure and of each concentric layer, except the outer most concentric layer, tangentially contacting six adjacent wires, the wires in the outer most concentric layer, between the wires forming the corners of said polygonal contour, tangentially contacting four adjacent wires, and the wires forming said corners tangentially contacting three adjacent wires, whereby the mechanical properties of said cord, including breaking load, rigidity and fatigue, are uniform in the lengthwise direction.
Claim 3
Dependent Claim
14 words
The cord according to claim 1 wherein said cross-sectional shape has a hexagonal contour.
Claim 4
Dependent Claim
29 words
The cord according to claim 2 wherein the cord consists of two or three concentric layers of outer wires arranged around a central basic structure of one inner wire.
Claim 5
Dependent Claim
30 words
The cord according to claim 2 wherein said cord consists of one, two or three concentric layers of outer wires arranged around a central basic structure of two inner wires.
Claim 6
Dependent Claim
30 words
The cord according to claim 2 wherein said cord consists of one, two or three concentric layers of outer wires arranged around a central basic structure of three inner wires.
Claim 7
Dependent Claim
30 words
The cord according to claim 2 wherein said cord consists of one, two or three concentric layers of outer wires arranged around a central basic structure of four inner wires.
Claim 8
Independent Claim
187 words
A method of making a single-strand steel cord comprising a central basic structure of inner steel wires and at least one concentric layer of outer steel wires arranged around the central basic structure, said cord being formed from single non-twisted steel wires in a single stage, said method comprising the steps of: (a) unwinding without twist, the wires from coils each consisting of a single wire; (b) delivering by positive slip-drive rollers the unwound wires to a means for regrouping and then to a strand-laying device comprising a double twist spindle; (c) regrouping the delivered wires in a grid followed by a die to form an assembly of wires, said die comprising specific guiding means for the central basic structure of said cord; (d) twisting the assembled wires in an assembling twister at a speed which imparts a false twist close to a nominal twist; (e) guiding the twisted wires through a double twist path loop, the wires being drawn by a capstan; (f) overtwisting the guided wires; (g) straightening the overtwisted wires; and (h) collecting the straightened wires on a bobbin located immediately after said capstan.
Claim 9
Independent Claim
187 words
A method of making a single-strand steel cord comprising a central basic structure of inner steel wires and at least one concentric layer of outer steel wires arranged around the central basic structure, said cord being formed from single non-twisted steel wires in a single stage, said method comprising the steps of: (a) unwinding without twist, the wires from coils each consisting of a single wire; (b) delivering by positive slip-drive rollers the unwound wires to a means for regrouping and then to a strand-laying device comprising a double twist spindle; (c) regrouping the delivered wires in a grid followed by a die to form an assembly of wires, said die comprising specific guiding means for the central basic structure of said cord; (d) twisting the assembled wires in an assembling twister at a speed which imparts a false twist close to a nominal twist; (e) guiding the twisted wires through a double twist path loop, the wires being drawn by a capstan; (f) overtwisting the guided wires; (g) straightening the overtwisted wires; and (h) collecting the straightened wires on a bobbin located immediately after said capstan.
Claim 10
Dependent Claim
22 words
The process according to claim 7 wherein the positive drive of the wires is performed by an individual means for each wire.
Claim 11
Dependent Claim
24 words
The process according to claim 7 wherein the positive drive of the wires is performed by a means common to a group of wires.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |