Patent US4252589A successfully refreshed from Google Patents.
US4252589A
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US
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Method for forming a mark indication on a tire side wall
Assignee: Bridgestone Corp
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Filing: 1978-10-20
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Granted: 1981-02-24
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Expires: 1998-10-20
Abstract
Abstract A mark indication is formed on the tire side wall by sticking partially vulcanized thin rubber sheets provided with mark indications on one side of said sheets along the circumferential direction of the green case at the outer surface corresponding to the side wall of the green case formed on a former and tightly adhering the rubber sheet integrally to the side wall through molding the green case into a toroidal form and vulcanizing said green case.
Inventors
- 👤 Toshio Hayakawa
- 👤 Shoji Yoshida
- 👤 Katsuyuki Harakon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:47
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0633; B60; B60C; B60C13/00; B60C13/001; B29C; B29C37/00; B29C2037/80; B29D30/72; B29D2030/726; Y; Y10; Y10S; Y10S152/00; Y10S152/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
A method for forming a mark indication on a tire side wall, which comprises sticking a thin rubber sheet which is provided with mark indications, such as letters, symbols and drawings on one side and have been partially vulcanized to a vulcanization degree of 50-80%, along the circumferential direction of the green case at the outer surface corresponding to the side wall of the green case cylindrically formed on a cylindrical former and tightly adhering the rubber sheet integrally to the side wall, through molding the green case into a toroidal form and vulcanizing the toroidally formed green case.
Claim 2
Independent Claim
99 words
A method for forming a mark indication on a tire side wall, which comprises sticking a thin rubber sheet which is provided with mark indications, such as letters, symbols and drawings on one side and have been partially vulcanized to a vulcanization degree of 50-80%, along the circumferential direction of the green case at the outer surface corresponding to the side wall of the green case cylindrically formed on a cylindrical former and tightly adhering the rubber sheet integrally to the side wall, through molding the green case into a toroidal form and vulcanizing the toroidally formed green case.
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1, wherein the partially vulcanized rubber sheet has a modulus at 300% of 40-50 kg/cm 3 and a Shore A hardness of 40°-50°.
Claim 4
Dependent Claim
18 words
A method as claimed in claim 1, wherein said thin rubber sheet has a thickness of 0.3-0.6 mm.
Claim 5
Dependent Claim
23 words
A method as claimed in claim 1, wherein the rubber sheet is printed with a mark indication on one side of said sheet.
References Cited (Backward Citations)
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Cited
US3382120A
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US3427215A
Cited
US3443619A
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US3648748A
Cited
US3663328A
Cited
US4019945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |