EP3212839A1 - Steel cord without flare and corresponding method - Google Patents
Steel cord without flare and corresponding methodInfo
- Publication number
- EP3212839A1 EP3212839A1 EP15763032.8A EP15763032A EP3212839A1 EP 3212839 A1 EP3212839 A1 EP 3212839A1 EP 15763032 A EP15763032 A EP 15763032A EP 3212839 A1 EP3212839 A1 EP 3212839A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel
- cord
- filaments
- steel cord
- local region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B9/00—Binding or sealing ends, e.g. to prevent unravelling
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
- D07B2201/106—Pitch changing over length
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
- D07B2201/2026—Pitch changing over length
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2015—Killing or avoiding twist
Definitions
- the invention relates to a steel cord without flare and to a method of
- Flare is the phenomenon that after cutting of a steel cord spreading of the filament ends or strand ends is observed. Due to the springy nature of high-carbon steel filaments, residual torsions either on cord level or on filament level or on both are present and cause the spreading if no precautions are taken.
- a steel cord having two ends and comprising steel filaments. At least some of the steel filaments are twisted along the length of the steel cord - except for a local region at at least one of the two ends - with a cord lay length L c .
- the steel cord has been additionally cold twisted, i.e. cold over-twisted, in a local region at at least one of the two ends in the same twisting direction of the filaments with the cord lay length L c , so that locally the steel filaments with an original lay length L c have a lay length that is less than 60%, e.g. less than 45%, e.g. less than 30%, e.g. less than 20% of the cord lay length L c in order to avoid flare.
- a local region at at least one of the two ends means that the local region comprises the end of the steel cord or is very close to the steel cord end.
- the invention has the advantage that no other material needs to be added and that welding and any other heat treatment is be avoided.
- the invention is a simple measure.
- the over-twisted steel cord end according to the invention has also shown to be more robust than a welded or burnt steel cord end. Indeed, in case the welded or burnt steel cord end hits a hard material or a spool, one or more individual filaments may become loose due to the brittleness introduced during with welding. This is not the case with an over-twisted steel cord end.
- the local region has a length that is at least one time, preferably two or three or more times the cord lay length l_c. Usually the length of the local region corresponds to a few centimetre.
- the invention is particularly relevant for steel cords comprising filaments that have a different torsion saturation level.
- the torsion saturation level of a steel filament is the level at which the residual torsions no longer increase despite the increasing number of applied torsions.
- the torsion saturation level of a steel filament is dependent upon the filament diameter, the tensile strength and the filament material, i.e. the steel composition. These steel cords often have flare, if no appropriate measures are taken.
- tensile strength levels are normal tensile strength, high-tensile strength, super-high-tensile strength and ultra-high-tensile strength;
- - a high-tensile strength has values ranging from 2400 MPa to 3200 MPa
- a super-high-tensile strength has values ranging from 3200 MPa to 3800 MPa
- - an ultra-high-tensile strength has values ranging from 3800 MPa to 4500 MPa
- composition is different from the second steel composition; examples can be a steel composition for normal tensile strength with typically a carbon content of about 0.70 weight per cent and a steel composition for higher tensile strengths with typically a carbon content of 0.80 weight per cent and higher and possibly with micro alloying elements such as chromium in amounts greater than 0.20 weight per cent.
- the invention is particularly appropriate for small steel cords, i.e. steel cords with a limited number of steel filaments, e.g. between two and nine, e.g. between two and six and with filament diameters below 0.40 mm, e.g. below 0.30 mm.
- the invention has proved to be particularly useful for a steel cord with a core group and a sheath group.
- the core group comprises core steel filaments.
- the sheath group comprises sheath steel filaments.
- the core steel filaments are untwisted or have a lay length greater than 300 mm - except in the local region.
- the sheath group and the core group are twisted around each other with a cord lay length - except in said local region. This cord lay length is much smaller than 300 mm, e.g. smaller than 100 mm.
- the core steel filaments may have a diameter di and the sheath filaments a diameter 02, where di is substantially different from 02. For example, di is greater than 02.
- the core group may have two to four steel filaments.
- the sheath group may have one to six steel filaments.
- a spool filled with a steel cord according to the first aspect of the invention.
- the local region with the over-twisting is situated at full spool. So only one steel cord end, namely the steel cord end at full spool (not the steel cord end at empty spool) needs to be over-twisted. The reason is that the steel cord end at full spool is the one which is first unwound and led to inserts.
- a method of manufacturing a steel cord according to the first aspect comprises the following steps:
- Figure 1 illustrates the prior art practice of welding.
- Figure 2 illustrates the invention on particular steel cord.
- Figure 3 illustrates the general principle of the invention.
- Figure 1 is a longitudinal view of a steel cord 10 with a core group of three steel filaments 12 with a diameter of 0.265 mm and a sheath group of three steel filaments 14 with a diameter of 0.17 mm.
- the lay length Lc of the cord is 14 mm.
- one end 16 of the steel cord 10 has been burnt to weld the individual ends of the steel filaments 12, 14 together to avoid spread.
- Figure 2 is a longitudinal view of a steel cord 20 with a core group of three steel filaments 22 with a filament diameter of 0.265 mm and a sheath group of three steel filaments 24 with a filament diameter 0.17 mm.
- the cord lay length is 14 mm.
- one end of the steel cord 20 has been over-twisted over a local region 26 of about 3 cm to have locally a lay length of only 3.5 mm.
- Other specific examples are:
- Figure 3 illustrates the general principle of the invention.
- Figure 3 is a longitudinal view of a steel cord 30 with steel filaments 32.
- the lay length of the steel cord is L c . At one end, over a local region /, the lay length has been reduced to L e to avoid flare.
- the steel composition of steel cords adapted for the reinforcement of rubber products such as tyres is along the following lines: a carbon content (% C) ranging from 0.60% to 1 .20%, e.g. 0.80% to 1 .1 %;
- a manganese content (% Mn) ranging from 0.10% to 1 .0%, e.g. from 0.20% to 0.80%;
- a silicon content (% Si) ranging from 0.10% to 1 .50%, e.g. from 0.15% to 0.70%;
- Steel filaments adapted for the reinforcement of tyres typically have filaments with a final diameter ranging from 0.05 mm to 0.60 mm, e.g. from 0.10 mm to 0.40 mm.
- filament diameters are 0.10 mm, 0.12 mm, 0.15 mm, 0.175 mm, 0.18 mm, 0.20 mm, 0.22 mm, 0.245 mm, 0.28 mm, 0.30 mm, 0.32 mm, 0.35 mm, 0.38 mm, 0.40 mm.
- Steel cords adapted for the reinforcement of rubber usually have a coating which promotes the adhesion with rubber such as a brass coating or a ternary alloy coating.
Landscapes
- Ropes Or Cables (AREA)
- Tires In General (AREA)
Abstract
A steel cord (20, 30) has two ends and comprises steel filaments (32). At least some of the steel filaments (32) are twisted along the length of the steel cord (20, 30) - except for a local region (26, I) at at least one of the two ends - with a cord lay length Lc. The steel cord (20, 30) is additionally cold twisted in said local region (26, I) so that locally the at least some of the steel filaments (32) have a lay length that is less than 60% of the cord lay length Lc in order to avoid flare / fraying and to facilitate further processing. A corresponding method is disclosed, too.
Description
STEEL CORD WITHOUT FLARE AND CORRESPONDING METHOD
Description
Technical Field
[0001 ] The invention relates to a steel cord without flare and to a method of
making such a steel cord.
Background Art
[0002] Flare is the phenomenon that after cutting of a steel cord spreading of the filament ends or strand ends is observed. Due to the springy nature of high-carbon steel filaments, residual torsions either on cord level or on filament level or on both are present and cause the spreading if no precautions are taken.
[0003] The spreading of the filament ends or strand ends makes pulling some of the steel cords through inserts or small holes of installations difficult or even impossible. As a consequence, some cord ends require a lot manual labour before being suitable for further processing.
[0004] Applying a false twisting operation may avoid or reduce flare for some steel cord types, but not for all steel cord types.
[0005] In a lot of practices the steel cord ends are welded to assure that the
filaments or strands stick together and do not spread. This welding operation, however, sometimes results in a local thickening of the steel cord ends. And this local thickening may make the insertion of the steel cord in the inserts so difficult that the welded end must be cut away, which may lead - again - to spreading of the freed steel filaments or steel strands. The risk for local thickening is particularly high for small steel cords since the electric power exercised by the welding equipment may result in a large heat affected zone.
Disclosure of Invention
[0006] It is a general object of the invention to avoid the problems of the prior art.
[0007] It is a particular object of the invention to avoid flare at a steel cord end.
[0008] It is another object of the invention to avoid welding of the steel cord ends.
[0009] It is yet another object of the invention to provide a robust and simple solution to the flare problem.
[0010] According to a first aspect of the invention, there is provided a steel cord having two ends and comprising steel filaments. At least some of the steel filaments are twisted along the length of the steel cord - except for a local region at at least one of the two ends - with a cord lay length Lc. The steel cord has been additionally cold twisted, i.e. cold over-twisted, in a local region at at least one of the two ends in the same twisting direction of the filaments with the cord lay length Lc, so that locally the steel filaments with an original lay length Lc have a lay length that is less than 60%, e.g. less than 45%, e.g. less than 30%, e.g. less than 20% of the cord lay length Lc in order to avoid flare.
[001 1 ] The terms "a local region at at least one of the two ends" means that the local region comprises the end of the steel cord or is very close to the steel cord end.
The terms "cold twisted" or "cold over-twisted" means that the additional twisting is done at ambient temperature, without extra heat treatment such as welding, glueing, or stress-relieving.
[0012] With respect to the upper limit 60% of the range of the local lay length, it is a good practice to stop over-twisting once flare is avoided. There is no need to over-twist more.
[0013] With respect to the lower limits 20% of the cord lay length Lc, care must be taken that no cord defects occur during over-twisting and that no cord diameter increase occurs.
[0014] The invention has the advantage that no other material needs to be added and that welding and any other heat treatment is be avoided. The invention is a simple measure.
[0015] The over-twisted steel cord end according to the invention has also shown to be more robust than a welded or burnt steel cord end. Indeed, in case the welded or burnt steel cord end hits a hard material or a spool, one or more individual filaments may become loose due to the brittleness introduced during with welding. This is not the case with an over-twisted
steel cord end.
[0016] Prior art documents WO 2013/079404 A1 , WO 03/100164 and US 5 238 177 A all disclose metal ropes or cords with a local region where the lay length has been expressly decreased. However, this local decrease of lay length is always combined with a heat treatment such as welding.
[0017] According to a preferable embodiment, the local region has a length that is at least one time, preferably two or three or more times the cord lay length l_c. Usually the length of the local region corresponds to a few centimetre.
[0018] The invention is particularly relevant for steel cords comprising filaments that have a different torsion saturation level. The torsion saturation level of a steel filament is the level at which the residual torsions no longer increase despite the increasing number of applied torsions. The torsion saturation level of a steel filament is dependent upon the filament diameter, the tensile strength and the filament material, i.e. the steel composition. These steel cords often have flare, if no appropriate measures are taken.
[0019] So preferable embodiments of the invention are:
- steel cords with steel filaments with a filament diameter di and steel filaments with a filament diameter 02, where di is substantially different from 02,
- steel cords with steel filaments with a first tensile strength and steel filaments with a second tensile strength, where the first tensile strength is different from the second tensile strength; examples of tensile strength levels are normal tensile strength, high-tensile strength, super-high-tensile strength and ultra-high-tensile strength;
for a filament diameter range between 0.18 mm and 0.28 mm:
- a normal tensile strength has values up to 2400 MPa,
- a high-tensile strength has values ranging from 2400 MPa to 3200 MPa,
- a super-high-tensile strength has values ranging from 3200 MPa to 3800 MPa,
- an ultra-high-tensile strength has values ranging from 3800 MPa to 4500 MPa;
- steel cords with steel filaments with a first steel composition and steel filaments with a second steel composition, where the first steel
composition is different from the second steel composition; examples can be a steel composition for normal tensile strength with typically a carbon content of about 0.70 weight per cent and a steel composition for higher tensile strengths with typically a carbon content of 0.80 weight per cent and higher and possibly with micro alloying elements such as chromium in amounts greater than 0.20 weight per cent.
[0020] The invention is particularly appropriate for small steel cords, i.e. steel cords with a limited number of steel filaments, e.g. between two and nine, e.g. between two and six and with filament diameters below 0.40 mm, e.g. below 0.30 mm.
[0021 ] The invention has proved to be particularly useful for a steel cord with a core group and a sheath group. The core group comprises core steel filaments. The sheath group comprises sheath steel filaments. The core steel filaments are untwisted or have a lay length greater than 300 mm - except in the local region. The sheath group and the core group are twisted around each other with a cord lay length - except in said local region. This cord lay length is much smaller than 300 mm, e.g. smaller than 100 mm.
The core steel filaments may have a diameter di and the sheath filaments a diameter 02, where di is substantially different from 02. For example, di is greater than 02.
The core group may have two to four steel filaments.
The sheath group may have one to six steel filaments.
[0022] According to a second aspect of the invention, there is provided a spool filled with a steel cord according to the first aspect of the invention. The local region with the over-twisting is situated at full spool. So only one steel cord end, namely the steel cord end at full spool (not the steel cord
end at empty spool) needs to be over-twisted. The reason is that the steel cord end at full spool is the one which is first unwound and led to inserts.
[0023] According to a third aspect of the invention, there is provided a method of manufacturing a steel cord according to the first aspect. The method comprises the following steps:
- twisting at least some of the steel filaments along the length of the steel cord with a cord lay length Lc;
- determining a local region at at least one of the ends;
- additionally twisting the steel cord in said local region to further locally decrease the lay length in order to avoid flare; this additional twisting is done in a cold state, i.e. without heat treatment such as welding, stress- relieving, glueing, soldering, ...
Brief Description of Figures in the Drawings
[0024] Figure 1 illustrates the prior art practice of welding.
[0025] Figure 2 illustrates the invention on particular steel cord.
[0026] Figure 3 illustrates the general principle of the invention.
[0027] Mode(s) for Carrying Out the Invention
Figure 1 is a longitudinal view of a steel cord 10 with a core group of three steel filaments 12 with a diameter of 0.265 mm and a sheath group of three steel filaments 14 with a diameter of 0.17 mm. The lay length Lc of the cord is 14 mm. According to the prior art practice, one end 16 of the steel cord 10 has been burnt to weld the individual ends of the steel filaments 12, 14 together to avoid spread.
[0028] Figure 2 is a longitudinal view of a steel cord 20 with a core group of three steel filaments 22 with a filament diameter of 0.265 mm and a sheath group of three steel filaments 24 with a filament diameter 0.17 mm. The cord lay length is 14 mm. According to the invention, one end of the steel cord 20 has been over-twisted over a local region 26 of about 3 cm to have locally a lay length of only 3.5 mm.
Other specific examples are:
1 ) 2+2x0.32 High Tensile - lay length 16 mm
length local region 3 cm
local lay length 3.5 mm
2) 2x0.25 Ultra High Tensile - lay length 14 mm
length local region 3.2 cm
local lay length 4.8 mm
3) 3x0.30 High Tensile - lay length 16 mm
length local region 3cm
local lay length 3.5 mm
[0029] In practice and in general one tries to limit the degree of over-twisting:
Over-twisting is done until flare is no longer present thereby avoiding introducing cord defects or increase of cord diameter.
[0030] Other similar cord constructions are:
- 2x0.24 + 1 x0.20
- 4x0.20 + 6x0.16
- 2x0.22 + 3x0.16
[0031 ] Figure 3 illustrates the general principle of the invention.
[0032] Figure 3 is a longitudinal view of a steel cord 30 with steel filaments 32.
The lay length of the steel cord is Lc. At one end, over a local region /, the lay length has been reduced to Le to avoid flare.
[0033] Other steel constructions for which the invention is particularly suitable are:
- 5x0.20
- 3x0.24
- 2x0.30
- 0.22 + 6x0.20
[0034] The steel composition of steel cords adapted for the reinforcement of rubber products such as tyres is along the following lines: a carbon
content (% C) ranging from 0.60% to 1 .20%, e.g. 0.80% to 1 .1 %;
a manganese content (% Mn) ranging from 0.10% to 1 .0%, e.g. from 0.20% to 0.80%;
a silicon content (% Si) ranging from 0.10% to 1 .50%, e.g. from 0.15% to 0.70%;
a sulfur content (% S) below 0.03%, e.g. below 0.01 %;
a phosphorus content (% P) below 0.03%, e.g. below 0.01 %,
all mentioned percentages being percentages by weight. Steel filaments adapted for the reinforcement of tyres typically have filaments with a final diameter ranging from 0.05 mm to 0.60 mm, e.g. from 0.10 mm to 0.40 mm. Examples of filament diameters are 0.10 mm, 0.12 mm, 0.15 mm, 0.175 mm, 0.18 mm, 0.20 mm, 0.22 mm, 0.245 mm, 0.28 mm, 0.30 mm, 0.32 mm, 0.35 mm, 0.38 mm, 0.40 mm.
Steel cords adapted for the reinforcement of rubber usually have a coating which promotes the adhesion with rubber such as a brass coating or a ternary alloy coating.
Claims
1 . A steel cord having two ends and comprising steel filaments,
at least some of the steel filaments being twisted along the length of the steel cord - except for a local region at at least one of the two ends - with a cord lay length Lc>
said steel cord being additionally cold twisted in a local region at at least one of the two ends so that locally said at least some of the steel filaments have a lay length that is less than 60% of the cord lay length Lc in order to avoid flare.
2. A steel cord according to claim 1 ,
wherein said local region has a length that is equal to or greater than the cord lay length Lc.
3. A steel cord according to any one of the preceding claims,
said steel cord comprising steel filaments with a filament diameter di and steel filaments with a filament diameter 02, di being substantially different from 02.
4. A steel cord according to any one of the preceding claims,
said steel cord comprising steel filaments with a first tensile strength level and steel filaments with a second tensile strength level, said first tensile strength level being different from said second tensile strength level.
5. A steel cord according to any one of the preceding claims,
said steel cord comprising steel filaments with a first steel composition and steel filaments with a second steel composition, said first steel composition being different from said second steel composition.
6. A steel cord according to any one of the preceding claims,
said steel cord comprising a core group and a sheath group,
said core group comprising of core steel filaments,
said sheath group comprising sheath steel filaments,
said core steel filaments being untwisted or having a lay length greater than
300 mm - except in said local region,
said sheath group and said core group being twisted around each other with a cord lay length that is smaller than 300 mm - except in said local region.
7. A steel cord according to claim 6,
wherein said core steel filaments have a diameter di and said sheath filaments have a diameter 02.
8. A steel cord according to claim 7,
wherein di is greater than 02.
9. A steel cord according to claim 6 to 8,
wherein said core group consists of two to four steel filaments.
10. A steel cord according to claims 6 to 9,
wherein said sheath group consists of 1 to six steel filaments.
1 1 . A steel cord according to any one of claims 1 to 5,
wherein said steel cord consists of two to nine steel filaments, each of said steel filaments having a diameter which is less than 0.40 mm.
12. A spool filled with a steel cord according to any one of claims 1 to 1 1 ,
said local region being situated at full spool.
13. A method of manufacturing a steel cord according to any one of claims 1 to 1 1 , said method comprising the following steps:
- twisting at least some of the steel filaments along the length of the steel cord with a cord lay length Lc;
- determining a local region at at least one of the ends;
- additionally twisting said steel cord in said local region to further locally decrease the lay length in order to avoid flare without heat treatment.
14. A method according to claim 13, said method comprising the following
additional step:
- inserting said additionally twisted steel cord through an insert or hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14191069 | 2014-10-30 | ||
| PCT/EP2015/071205 WO2016066319A1 (en) | 2014-10-30 | 2015-09-16 | Steel cord without flare and corresponding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3212839A1 true EP3212839A1 (en) | 2017-09-06 |
Family
ID=51900107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15763032.8A Withdrawn EP3212839A1 (en) | 2014-10-30 | 2015-09-16 | Steel cord without flare and corresponding method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3212839A1 (en) |
| CN (1) | CN107002356B (en) |
| BR (1) | BR112017007522B1 (en) |
| WO (1) | WO2016066319A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074658B (en) * | 2020-01-14 | 2024-12-24 | 深圳市益联塑胶有限公司 | Automatic rope knotting device and method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2051900A (en) * | 1932-12-10 | 1936-08-25 | Bendix Brake Co | Method of making cable ends |
| CH277423A (en) * | 1949-12-05 | 1951-08-31 | Weinmann & Co | Method of fastening coupling pieces to the ends of the cable of Bowden cables |
| JPS57151403A (en) * | 1981-03-12 | 1982-09-18 | Bridgestone Corp | Pneumatic tyre |
| US5238177A (en) * | 1992-08-10 | 1993-08-24 | Flexible Steel Lacing Company | Method and apparatus for forming conveyor belt hinge pins |
| EP1365063A1 (en) * | 2002-05-23 | 2003-11-26 | N.V. Bekaert S.A. | Metal cord |
| CN101829764A (en) * | 2010-04-17 | 2010-09-15 | 贵州钢绳股份有限公司 | Molten metal casting method for cable wire end |
| FR2959517B1 (en) * | 2010-04-28 | 2012-09-21 | Michelin Soc Tech | ELASTIC MULTITOROUS METAL CABLE WITH HIGH PERMEABILITY. |
| EP2785505A1 (en) | 2011-11-28 | 2014-10-08 | NV Bekaert SA | Steel cord for extrusion process, an apparatus and method and use of said steel cord |
| CN103958154A (en) * | 2011-11-28 | 2014-07-30 | 贝卡尔特公司 | Steel cord for extrusion process and device, method and use of said steel cord |
-
2015
- 2015-09-16 EP EP15763032.8A patent/EP3212839A1/en not_active Withdrawn
- 2015-09-16 WO PCT/EP2015/071205 patent/WO2016066319A1/en not_active Ceased
- 2015-09-16 CN CN201580057795.2A patent/CN107002356B/en active Active
- 2015-09-16 BR BR112017007522-9A patent/BR112017007522B1/en not_active IP Right Cessation
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2016066319A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107002356B (en) | 2020-11-03 |
| BR112017007522B1 (en) | 2022-05-24 |
| WO2016066319A1 (en) | 2016-05-06 |
| BR112017007522A2 (en) | 2017-12-19 |
| CN107002356A (en) | 2017-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5806644B2 (en) | Hybrid heart rope | |
| EP3140452B1 (en) | Steel cord with reduced residual torsions | |
| CN101802297A (en) | Cord, process for producing the same, and composite of cord with rubber | |
| CN106574438B (en) | Steel cords for reinforcing rubber products | |
| JP2019513916A (en) | Hoist rope | |
| CN106536819A (en) | Steel cord for reinforcing rubber article | |
| JP6689747B2 (en) | Steel cord for reinforcing rubber articles | |
| JPWO2018198776A1 (en) | Steel cord for reinforcing rubber articles, method for producing the same, and tire | |
| CN106715790A (en) | Steel cord for reinforcing rubber articles and pneumatic tire using the steel cord | |
| WO2015193099A1 (en) | A 4+9+14 Steel Cord | |
| JP5625604B2 (en) | Steel cord for rubber reinforcement | |
| US12296631B2 (en) | Steel cord for rubber reinforcement | |
| KR20220098337A (en) | Steel cord and its manufacturing method | |
| JP6028508B2 (en) | Steel cord for rubber reinforcement | |
| WO2007097354A1 (en) | High-strength pc steel stranded wire, process for manufacturing the same, and concrete structure utilizing the wire | |
| WO2016066319A1 (en) | Steel cord without flare and corresponding method | |
| CN107208369A (en) | Rubber article enhancing steel cord and tire | |
| JP6717701B2 (en) | Steel cord for tire and pneumatic tire using the same | |
| JP2000192379A (en) | Steel cord for reinforcing rubber article | |
| JP4913654B2 (en) | Compressed conductor | |
| EP2807400A1 (en) | Chinese finger with flat or flattened filaments | |
| JP2011231419A (en) | Steel cord for reinforcing rubber article and tire using the same | |
| WO2014079670A1 (en) | Log bundling strand and/or swaging sleeve with roughnesses | |
| CN106049140B (en) | Skyscraper suspention composite cable steel wire rope and its manufacturing method | |
| JP2022188619A (en) | Hybrid rope and method for manufacturing hybrid rope |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20170316 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20190506 |
|
| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230619 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20231031 |