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 hoops

Info

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
Application number
FR7624518A
Other languages
French (fr)
Other versions
FR2361219B1 (en
Inventor
Henri Jean Mirtain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uniroyal SA
Original Assignee
Uniroyal SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uniroyal SA filed Critical Uniroyal SA
Priority to FR7624518A priority Critical patent/FR2361219A1/en
Publication of FR2361219A1 publication Critical patent/FR2361219A1/en
Application granted granted Critical
Publication of FR2361219B1 publication Critical patent/FR2361219B1/fr
Granted legal-status Critical Current

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.
FR7624518A 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 Granted FR2361219A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (3)

* Cited by examiner, † Cited by third party
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