Belt building drum
Abstract
Abstract A segmented collapsible drum for building an endless inextensible belt assembly, optionally including a tread, for a tire. The drum features edge guides mounted in pairs on each segment of the drum. Pairs of the guides for a plurality of plies are disposed in alternating sequences about the drum and at differing radial heights above the drum surface to locate plies of differing widths as they are wrapped successively about the drum. Pairs of guides spaced radially outwardly from the drum surface are movable axially to overlie a wider inner ply and to locate a narrower outer ply. These latter pairs can then be moved axially outward to allow collapse of the drum and removal of the completed belt assembly.
Inventors
- 👤 R Riggs
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |