Reinforced plastic cushioning material
Abstract
Abstract Cushioning material is formed of plural plies of thermoplastic sheet material heat bonded together in a particular manner to provide the material useful under moderate and high pressures. A first ply has cellular protrusions extending from one side. The second side carries a second sheet heat bonded to land areas of a grid bordering the openings of the protrusions. The second sheet has a pattern of a heat resistant lacquer on the side fronting the first sheet to prevent overall heat bonding of the land areas with the second sheet. The pattern is such as to provide that some land area surrounding each protrusion opening will be heat bonded while the remaining land area defining the protrusion opening will be free of bond with the second sheet so that air flow may occur between protrusions within the sheet structure.
Inventors
- 👤 J Gresham
- 👤 L Juracek
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |