Method and apparatus for bending glass sheets
Abstract
Abstract METHOD AND APPARATUS FOR BENDING GLASS SHEETS IN WHICH A FLAT SHEET OF GLASS, HEATED TO BENDING TEMPERATURE, IS SUPPORTED HORIZONTALLY ABOVE A PRIMARY MOLD MEMBER HAVING A SHAPING SURFACE OF THE CURVATURE CORRESPONDING TO THE SHEET WHEN BENT. THE MOLD MEMBER IS MOVED UPWARDLY TO LIFT THE SHEET, WHEREUPON THE SHEET WILL SETTLE INTO CONTACT WITH THE SHAPING SURFACE OF THE MOLD UNDER THE INFLUENCE OF FORCES RESULTING FROM THE INERTIA OF THE SHEET AND FROM GRAVITY. A SECONDARY MOLD MEMBER, MOUNTED ABOVE THE PRIMARY MOLD MEMBER, IS PROVIDED TO ENGAGE CERTAIN SPACED PORTIONS ONLY ON THE EDGES OF THE SHEET WHICH TEND TO CURL UPWARD AS INERTIAL FORCES CAUSE THE CENTER OF THE SHEET TO INSURE THAT THESE PORTIONS WILL BE PRESSED INTO CONFORMITY WITH THE PRIMARY MOLD MEMBER.
Inventors
- 👤 George F Ritter Jr
- 👤 Frank J Hymore
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |