Patent US3833437A successfully refreshed from Google Patents.
US3833437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire building method
Assignee: Goodyear Tire and Rubber Co
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Filing: 1972-10-10
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Granted: 1974-09-03
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Expires: 1992-10-10
Abstract
Abstract A mill for forming a thin sheet of a curable elastomer and a tire carcass receiving drum are combined in apparatus including a conveyor spaced from the mill and engageable with a tire carcass on the drum so as to rotate the drum and wind thereon a continuous plurality of convolutions of the sheet. Slitters located in a space traversed by the sheet between the mill and the conveyor and controlled by a profiling device to be movable in timed relation to the rotation of the carcass vary the width or widths of the sheet portion applied while a second conveyor diverts remaining portions of the sheet from the first conveyor for return to the mill. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawings and the following detailed description.
Inventors
- 👤 P Appleby
- 👤 C Christie
- 👤 E Woodhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:02
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
A method of building a tire comprising forming a carcass of at least one ply of tire reinforcing fabric in generally cylindrical form, attaching to said ply a pair of parallel coaxial spaced apart tire beads and turning respective end portions of said cylindrically formed ply about each of said beads, applying circumferentially about said cylindrically formed ply circumferential bands of sidewall material to cover and secure said ply ends axially inwardly of said beads and then removing said carcass including said sidewall portion into engagement with drum means capable of change of form between cylindrical and toroidal form, shaping carcass thereon into a toroidal form, and applying to at least the crown portion of said carcass, a continuous plurality of convolutions of thin rubber material of continuously varying width to build upon said carcass a predetermined thickness and cross-section of tread portion of said tire.
Claim 2
Independent Claim
146 words
A method of building a tire comprising forming a carcass of at least one ply of tire reinforcing fabric in generally cylindrical form, attaching to said ply a pair of parallel coaxial spaced apart tire beads and turning respective end portions of said cylindrically formed ply about each of said beads, applying circumferentially about said cylindrically formed ply circumferential bands of sidewall material to cover and secure said ply ends axially inwardly of said beads and then removing said carcass including said sidewall portion into engagement with drum means capable of change of form between cylindrical and toroidal form, shaping carcass thereon into a toroidal form, and applying to at least the crown portion of said carcass, a continuous plurality of convolutions of thin rubber material of continuously varying width to build upon said carcass a predetermined thickness and cross-section of tread portion of said tire.
Claim 3
Dependent Claim
50 words
The method as claimed in claim 1, including urging the respective bead portions of said carcass axially outwardly onto axially spaced apart coned rigid bead seat means by extending a tubular membrane from cylindrical to toric within said carcass while moving said bead seat means axially inwardly toward one another.
Claim 4
Independent Claim
129 words
A method of building a tire comprising assembling at least one reinforcing cord ply and two spaced apart parallel coaxial inextensible endless bead cores to form a unitary integral uncured cylindrical tire carcass, mounting said carcass on rotatable drum means capable of change from a cylindrical form to a toroidal form and shaping said cylindrical carcass thereon to a toroidal shape, forming continuously a thin sheet of rubber material while moving the same continuously first over at least one unsupported reach and subsequently on and with an endless flat belt support into wrapping engagement with said carcass while the carcass is in its toroidal shape and while maintaining a difference in the surface speed of said thin sheet between the forming thereof and the wrapping thereof about said carcass.
Claim 5
Independent Claim
129 words
A method of building a tire comprising assembling at least one reinforcing cord ply and two spaced apart parallel coaxial inextensible endless bead cores to form a unitary integral uncured cylindrical tire carcass, mounting said carcass on rotatable drum means capable of change from a cylindrical form to a toroidal form and shaping said cylindrical carcass thereon to a toroidal shape, forming continuously a thin sheet of rubber material while moving the same continuously first over at least one unsupported reach and subsequently on and with an endless flat belt support into wrapping engagement with said carcass while the carcass is in its toroidal shape and while maintaining a difference in the surface speed of said thin sheet between the forming thereof and the wrapping thereof about said carcass.
Claim 6
Dependent Claim
23 words
A method as claimed in claim 3, including changing progressively the width of said sheet in response to the rotation of said carcass.
Claim 7
Dependent Claim
25 words
A method as claimed in claim 4, including slitting a longitudinal portion of said sheet to form a parallel pair of sheets of lesser width.
Claim 8
Dependent Claim
32 words
A method as claimed in claim 3, including urging the belt with said sheet thereon against said carcass to rotate the carcass while transferring said sheet from said belt to said carcass.
Claim 9
Dependent Claim
25 words
A method as claimed in claim 6, said urging being sufficient to deflect said carcass to engage at least approximately said width of said sheet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |