US3077753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bending glass
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1955-07-01
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Granted: 1963-02-19
•
Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Dammers August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:38
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/031
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
BENDING APPARATUS FOR GLASS SHEET COMPRISING A CONVEX, RIGID, BENDING FORM AND A FLEXIBLE BENDING FORM MOUNTED IN COOPERATING POSITION, MEANS TO SUSPEND A GLASS SHEET BETWEEN THE FORMS, MEANS TO MOVE AT LEAST ONE FORM TO PRESS AND BEND THE SHEET BETWEEN THE FORMS, SAID FLEXIBLE FORM COMPRISING A FLEXIBLE FABRIC SUPPORTED AT ITS ENDS ON ROLLERS, SAID ROLLERS BEING LOADED TO TENSION THE FLEXIBLE FABRIC, SAID ROLLERS HAVING AN OUTER LAYER OF THICK, FLEXIBLE RUBBER.
Claim 2
Dependent Claim
77 words
BENDING APPARATUS FOR GLASS SHEET COMPRISING A CONVEX, RIGID, BENDING FORM AND A FLEXIBLE BENDING FORM MOUNTED IN COOPERATING POSITION, MEANS TO SUSPEND A GLASS SHEET BETWEEN THE FORMS, MEANS TO MOVE AT LEAST ONE FORM TO PRESS AND BEND THE SHEET BETWEEN THE FORMS, SAID FLEXIBLE FORM COMPRISING A FLEXIBLE FABRIC SUPPORTED AT ITS ENDS ON ROLLERS, SAID ROLLERS BEING LOADED TO TENSION THE FLEXIBLE FABRIC, SAID ROLLERS HAVING AN OUTER LAYER OF THICK, FLEXIBLE RUBBER.
Claim 3
Independent Claim
94 words
A METHOD OF BENDING A GLASS SHEET WHICH COMPRISES FREELY SUSPENDING SAID GLASS SHEET IN A VERTICAL POSITION, HEATING THE SHEET TO BENDING TEMPERATURE WHILE THE SHEET IS FREE FROM ANY SUBSTANTIAL BENDING PRESSURE, THEREAFTER CLAMPING AND BENDING A PORTION OF THE GLASS SHEET BETWEEN A RIGID CONVEX DIE AND A FLEXIBLE SHEET YIELDINGLY MAINTAINED UNDER TENSION, AND MOVING AT LEAST ONE OF THE DIE AND FLEXIBLE SHEET TOWARD THE OTHER TO EXTEND THE AREA OF CLAMPING OF THE GLASS SHEET AND PROGRESSIVELY TO BEND THE GLASS SHEET INTO CONFORMITY WITH THE CONVEX DIE.
Claim 4
Independent Claim
94 words
A METHOD OF BENDING A GLASS SHEET WHICH COMPRISES FREELY SUSPENDING SAID GLASS SHEET IN A VERTICAL POSITION, HEATING THE SHEET TO BENDING TEMPERATURE WHILE THE SHEET IS FREE FROM ANY SUBSTANTIAL BENDING PRESSURE, THEREAFTER CLAMPING AND BENDING A PORTION OF THE GLASS SHEET BETWEEN A RIGID CONVEX DIE AND A FLEXIBLE SHEET YIELDINGLY MAINTAINED UNDER TENSION, AND MOVING AT LEAST ONE OF THE DIE AND FLEXIBLE SHEET TOWARD THE OTHER TO EXTEND THE AREA OF CLAMPING OF THE GLASS SHEET AND PROGRESSIVELY TO BEND THE GLASS SHEET INTO CONFORMITY WITH THE CONVEX DIE.
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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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |