FR2361219A1 - Type bead reinforcement hoops made from aromatic polyamide cords - for less weight and easier tyre fitting than metallic bead hoops - Google Patents
Type bead reinforcement hoops made from aromatic polyamide cords - for less weight and easier tyre fitting than metallic bead hoopsInfo
- Publication number
- FR2361219A1 FR2361219A1 FR7624518A FR7624518A FR2361219A1 FR 2361219 A1 FR2361219 A1 FR 2361219A1 FR 7624518 A FR7624518 A FR 7624518A FR 7624518 A FR7624518 A FR 7624518A FR 2361219 A1 FR2361219 A1 FR 2361219A1
- Authority
- FR
- France
- Prior art keywords
- hoops
- bead
- cords
- drum
- metallic
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
Abstract
Tyre bead reinforcement made by spiral lay-up on to a drum mandrel of a rubber sheet incorporating an array of aromatic polyamide (aramide, e.g. 'KEVLAR'-RTM) cords followed by circumferential cutting of the wound sheet to obtain narrower hoops for individual bead reinforcement. The drum can be contracted radially to facilitate removal of the bead hoops after the sheet supported by the drum has been sliced circumferentially. The drum is covered with silicone rubber or other material resistant to cutting. Bead hoops of equivalent strength to hoops made of metallic cord are approx. 1/6th of the wt. of the metallic cords. The toughness of the polaramide cords and the method of cutting result in negligible damage or wear to individual cords or knives respectively. The greater extensibility of the polyamide bead hoops facilitates fitting/removal of tyres to/from a wheel rim.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7624518A FR2361219A1 (en) | 1976-08-11 | 1976-08-11 | Type bead reinforcement hoops made from aromatic polyamide cords - for less weight and easier tyre fitting than metallic bead hoops |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7624518A FR2361219A1 (en) | 1976-08-11 | 1976-08-11 | Type bead reinforcement hoops made from aromatic polyamide cords - for less weight and easier tyre fitting than metallic bead hoops |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2361219A1 true FR2361219A1 (en) | 1978-03-10 |
FR2361219B1 FR2361219B1 (en) | 1978-12-22 |
Family
ID=9176782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7624518A Granted FR2361219A1 (en) | 1976-08-11 | 1976-08-11 | Type bead reinforcement hoops made from aromatic polyamide cords - for less weight and easier tyre fitting than metallic bead hoops |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2361219A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998051483A1 (en) * | 1997-05-12 | 1998-11-19 | A.R.T. | A method of and apparatus for producing single wire beads for tyres |
WO2001043957A1 (en) * | 1999-12-15 | 2001-06-21 | Pirelli Pneumatici S.P.A. | A method for manufacturing reinforcing annular elements for vehicle tyres, and a tyre incorporating inextensible annular inserts manufactured by such a method |
-
1976
- 1976-08-11 FR FR7624518A patent/FR2361219A1/en active Granted
Non-Patent Citations (1)
Title |
---|
NEANT * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998051483A1 (en) * | 1997-05-12 | 1998-11-19 | A.R.T. | A method of and apparatus for producing single wire beads for tyres |
US6228198B1 (en) | 1997-05-12 | 2001-05-08 | A.R.T. | Method of and apparatus for producing single wire beads for tires |
WO2001043957A1 (en) * | 1999-12-15 | 2001-06-21 | Pirelli Pneumatici S.P.A. | A method for manufacturing reinforcing annular elements for vehicle tyres, and a tyre incorporating inextensible annular inserts manufactured by such a method |
Also Published As
Publication number | Publication date |
---|---|
FR2361219B1 (en) | 1978-12-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |