US3654007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of folding fabric about a tire bead
Assignee: Dunlop Holdings Ltd
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Filing: 1968-11-22
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Granted: 1972-04-04
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Expires: 1988-11-22
Abstract
Abstract A method of reducing distortion of the steel cords of a radial ply carcass of a pneumatic tire provided with a bias laid filler strip in the bead region of the tire, during the turn-up of the carcass and the filler strip about the tire bead comprising lubricating the tire elements in the bead region of the tire.
Inventors
- 👤 Roy D J Winstanley
- 👤 Alfred H Grossett
- 👤 Wilfred H Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:37
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/32; B60; B60C; B60C15/00; B60C15/06; B60C15/0603; B60C15/0607
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A method according to claim 1 wherein at least one marginal circumferential region of a superimposed portion of said first reinforcing layer with respect to said second reinforcing layer is devoid of lubricant to enable adhesion to take place between said first and second layers.
Claim 2
Dependent Claim
25 words
A method according to claim 1 including coating the bead core with a layer of lubricant further to assist relative movement between the tire elements.
Claim 3
Dependent Claim
22 words
A method according to claim 3 including wrapping the bead core with a spiral wrapping of fabric to enclOse said lubricant layer.
Claim 4
Dependent Claim
24 words
A method according to claim 3 wherein said bead core is constructed by enclosing an assembly of bead wires in a sheath of rubber.
Claim 5
Dependent Claim
18 words
A method according to claim 5 including molding said sheath of rubber onto the assembly of bead wires.
Claim 6
Dependent Claim
21 words
A method according to claim 1 including the use of a solution of zinc stearate in industrial alcohol as said lubricant.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |