Method for detection of blown beads in pneumatic tires
Abstract
Abstract Areas (49) of improper cure in the vicinity of a bead (46, 47, 52, 53) in a pneumatic tire (11) are nondestructively detected by first generating a holographic interference pattern of the interior of the tire (11) in the region of the bead (46, 47, 52, 53). The resulting holographic interference pattern has an ordered pattern of fringe lines (60) produced by the bead (46, 47, 52, 53). A determination is made if there exists a band (64) of fringe lines (60) at the edge of and separated from the ordered pattern of fringe lines (60) produced by the bead (46, 47, 52, 53), and, if so, the number of fringe lines in the band (64) are counted. If the band (64) contains three or four fringe lines the tire (11) contains areas (49) of improper cure in the vicinity of a bead (46, 47, 52, 53).
Inventors
- 👤 Charles M. Hoff, Jr.
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |