US3772125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire building drum having a carcass ply support and foldover mechanism
Assignee: PNEU UNIROYAL ENGLEBERT
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Filing: 1971-09-07
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Granted: 1973-11-13
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Expires: 1991-09-07
Abstract
Abstract A rotatable and axially movable carcass ply support associated with a pneumatic tire building machine or a collapsible rotating tire building drum. The support comprises a ferrule affixed to a ferrule-holder ring wich is able to rotate and slide axially with respect to the ends of the building drum by means of a plurality of roller bearings disposed within the ring. The ferrule-holder ring includes a drive element which cooperates with a servo means to allow axial movement of the ring and the ferrule with respect to the ends of the building drum. Cooperating with the ferrule and ferrule-holder ring is a bead-setting ring and a plurality of carcass ply foldover fingers. The ferrule supports the marginal edges of the carcass ply which may be wider than the building drum. The ferrule is able to rotate with the drum thereby preventing the distortion or twisting of the marginal edges.
Inventors
- 👤 J Leblond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:30
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/24; B29D30/244; B29D30/248; B29D30/26; B29D30/32
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
148 words
A carcass layer support mechanism, for use with a tire building drum rotating about its axis, comprising: a support means having an extension coaxial with the axis of said building drum, said support means movable axially of said drum; an annular support coaxial with the extension of the support means; roller means disposed between and in surface contact with the exteNsion of the support means and the annular support, said roller means for supporting the annular support in rotation about the drum axis and said roller means allowing the annular support to move axially of said drum; and a cylindrical ferrule coaxially affixed to the annular support and extending from the annular support in a direction parallel to the drum axis so as to provide an extension of the drum surface to support a portion of a carcass layer being wound about the drum as the drum rotates.
Claim 2
Dependent Claim
148 words
A carcass layer support mechanism, for use with a tire building drum rotating about its axis, comprising: a support means having an extension coaxial with the axis of said building drum, said support means movable axially of said drum; an annular support coaxial with the extension of the support means; roller means disposed between and in surface contact with the exteNsion of the support means and the annular support, said roller means for supporting the annular support in rotation about the drum axis and said roller means allowing the annular support to move axially of said drum; and a cylindrical ferrule coaxially affixed to the annular support and extending from the annular support in a direction parallel to the drum axis so as to provide an extension of the drum surface to support a portion of a carcass layer being wound about the drum as the drum rotates.
Claim 3
Dependent Claim
19 words
A mechanism according to claim 1 wherein the annular support and the extension of the support means are concentric.
Claim 4
Dependent Claim
18 words
A mechanism according to claim 1 wherein the roller means comprise a plurality of coaxially spaced rotating rings.
Claim 5
Dependent Claim
21 words
A mechanism according to claim 1 wherein the roller means comprises at least two axially spaced, circumferentially arranged rows of rollers.
Claim 6
Dependent Claim
33 words
A mechanism according to claim 4 wherein the rollers are mounted in coaxial pairs on a plurality of guide rods, the axis of each guide rod being parallel to the drum rotation axis.
Claim 7
Dependent Claim
29 words
A mechanism according to claim 4 wherein the rollers in the same circumferential row are recessed in an annular groove located on an internal wall of the annular support.
Claim 8
Dependent Claim
31 words
A mechanism according to claim 1 wherein a drive means is disposed between the support means and the annular support for the axial movement of the ferrule and the annular support.
Claim 9
Dependent Claim
31 words
A mechanism according to claim 7 wherein the drive means comprises an element concentric with the annular support, the axis of the annular support being coaxial with the drum rotation axis.
Claim 10
Dependent Claim
16 words
A mechanism according to claim 7 wherein the drive means is a plurality of circular sections.
Claim 11
Dependent Claim
25 words
A mechanism according to claim 7 wherein the drive means is disposed in an annular groove located on an internal wall of the annular support.
Claim 12
Dependent Claim
25 words
A mechanism according to claim 7 wherein the drive means is operated in a direction parallel to the drum rotation axis by a control means.
Claim 13
Dependent Claim
22 words
A mechanism according to claim 1 wherein the extension of the support means has a peripherial edge having a bead setting means.
Claim 14
Dependent Claim
25 words
A mechanism according to claim 12 wherein the peripheral edge includes means for controlling the radial movement of a plurality of carcass ply foldover fingers.
Claim 15
Dependent Claim
35 words
A mechanism according to claim 1 comprising a carcass ply folding means mounted on a hub, said hub supported by said support means, and the axis of said hub being coaxial with the drum axis.
Claim 16
Dependent Claim
22 words
A mechanism according to claim 14 comprising connecting means for selectively restraining the axial separation of the hub and the support means.
Claim 17
Dependent Claim
27 words
A mechanism according to claim 12 wherein the support means includes a centering means coaxial with the drum axis for the positioning of the bead setting means.
Claim 18
Dependent Claim
22 words
A mechanism according to claim 14 wherein the hub and the support means are urged into axial separation by a spring means.
Claim 19
Dependent Claim
26 words
A mechanism according to claim 9 wherein the plurality of circular sections are connected to each other so as to form a rigid annular drive ring.
Claim 20
Dependent Claim
15 words
A mechanism according to claim 7 wherein the drive means is a continuous annular ring.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |