Patent US3580781A successfully refreshed from Google Patents.
US3580781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for building up tread material on a tire carcass
Assignee: Bridgestone Firestone Inc
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Filing: 1968-05-20
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Granted: 1971-05-25
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Expires: 1988-05-20
Abstract
Abstract A TIRE CARCASS SUPPORTED IN ROTATING CONTACT WITH A ROLL PICKS UP RUBBER TREAD MATERIAL FROM THE ROLL TO BUILD UP THE DESIRED CONTOUR OF TREAD MATERIAL ON THE CARCASS. CUTTERS ON THE ROLL SEPARATE A SHEET OF TREAD MATERIAL INTO A PLURALITY OF RIBBONS, AT LEAST ONE OF WHICH IS REMOVED FROM THE ROLL BEFORE THE ROLL CONTACTS THE TIRE CARCASS. THE CUTTERS ARE POSITIONED TO VARY THEIR SPACING AND THUS CHANGE THE RIBBON WIDTHS. BY REMOVING THE CENTER STRIP, TREAD MATERIAL IN THE SHOULDER AREAS CAN BUILT UP AS DESIRED. D R A W I N G
Inventors
- 👤 Jack Lyndon Hollis
- 👤 Ray Douglas Shockey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:27
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/58; B29D30/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |