US4830693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a tire around a bead
Assignee: Bridgestone Corp
•
Filing: 1986-11-07
•
Granted: 1989-05-16
•
Expires: 2006-11-07
Abstract
Abstract A method and apparatus for forming a tire in which an inner circumference of a tire carcass is wrapped around a tire bead by being grasped by an expanding air bladder against a stopper plate. The stopper plate, with the bladder still inflated is raised relative to the bead and main tire carcass and then moved into the annular portion of the tire carcass to encase the bead.
Inventors
- 👤 Yukitaka Okafuji
- 👤 Kunio Tajima
- 👤 Masaharu Sumiuchi
- 👤 Masami Adachi
- 👤 Shoji Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:04
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/32; B29D2030/3221; B29D2030/3242; B29D2030/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A method of forming a tire comprising in sequence, the steps of: pushing and spreading bending-over portions of a tire member wound on a tire forming drum by bladders to pinch the outer ends of said portions between said bladders and cylindrical bodies; moving said bodies axially toward the middle part of said drum to bend over said portions around wire beads; moving said bladders out from between said member and said bodies; and reducing diameters of said bodies to hold the already bent-over tire member on the peripheral surface of said drum and axially moving said bodies to convey said member axially from said drum.
Claim 2
Independent Claim
106 words
A method of forming a tire comprising in sequence, the steps of: pushing and spreading bending-over portions of a tire member wound on a tire forming drum by bladders to pinch the outer ends of said portions between said bladders and cylindrical bodies; moving said bodies axially toward the middle part of said drum to bend over said portions around wire beads; moving said bladders out from between said member and said bodies; and reducing diameters of said bodies to hold the already bent-over tire member on the peripheral surface of said drum and axially moving said bodies to convey said member axially from said drum.
References Cited (Backward Citations)
US3490980A
Cited
US3616059A
Cited
US3839115A
Cited
US4145238A
Cited
US4199393A
Cited
US4302274A
Cited
US4584038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |