US3136619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bending glass
Assignee: PPG Industries Inc
•
Filing: 1960-10-25
•
Granted: 1964-06-09
•
Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Grace D Mcroberts
- 👤 Golightly James Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:53
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0256
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
IN APPARATUS FOR GRAVITY BENDING OF GLASS SHEETS WHILE HEATED, A SUBSTANTIALLY HORIZONTALLY DISPOSED MOLD HAVING AN END PORTION THAT CONFORMS TO AN END PORTION OF A CURVED GLASS SHEET, SAID MOLD END PORTION BEING PROVIDED WITH A FACE THAT ENGAGES THE UNDERSIDE OF A BENT GLASS SHEET, A GLASS RETAINING MEMBER MOUNTED ON SAID MOLD END PORTION FOR MOVEMENT TOWARD AND AWAY FROM THE GLASS ENGAGING FACE OF SAID MOLD END PORTION, WEIGHT MEANS MOUNTED ON SAID MOLD END PORTION, AND MEANS FOR CONNECTING SAID WEIGHT MEANS TO SAID GLASS RETAINING MEMBER AND FOR POSITIONING THE WEIGHT MEANS TO APPLY A THRUST OPPOSING THE FORCE SAID GLASS RETAINING MEMBER APPLIES TOWARD THE GLASS ENGAGING FACE OF SAID MOLD END PORTION WHEN THE GLASS RETAINING MEMBER CONTACTS THE UPPER SURFACE OF A HORIZONTALLY DISPOSED FLAT GLASS SHEET MOUNTED ON SAID MOLD FOR BENDING AND TO REVERSE THE THRUST OF SAID MOLD FOR BENDING AND TO REVERSE THE THRUST OF SAID WEIGHT MEANS TO URGE SAID GLASS RETAINING MEMBER TOWARD SAID GLASS ENGAGING FACE OF SAID MOLD END PORTION TO CLAMP THE END PORTION OF THE CURVED GLASS SHEET BETWEEN SAID GLASS RETAINING MEMBER AND SAID GLASS ENGAGING FACE OF SAID MOLD END PORTION IN RESPONSE TO THE BENDING OF SAID END PORTION OF SAID GLASS SHEET.
Claim 2
Dependent Claim
216 words
IN APPARATUS FOR GRAVITY BENDING OF GLASS SHEETS WHILE HEATED, A SUBSTANTIALLY HORIZONTALLY DISPOSED MOLD HAVING AN END PORTION THAT CONFORMS TO AN END PORTION OF A CURVED GLASS SHEET, SAID MOLD END PORTION BEING PROVIDED WITH A FACE THAT ENGAGES THE UNDERSIDE OF A BENT GLASS SHEET, A GLASS RETAINING MEMBER MOUNTED ON SAID MOLD END PORTION FOR MOVEMENT TOWARD AND AWAY FROM THE GLASS ENGAGING FACE OF SAID MOLD END PORTION, WEIGHT MEANS MOUNTED ON SAID MOLD END PORTION, AND MEANS FOR CONNECTING SAID WEIGHT MEANS TO SAID GLASS RETAINING MEMBER AND FOR POSITIONING THE WEIGHT MEANS TO APPLY A THRUST OPPOSING THE FORCE SAID GLASS RETAINING MEMBER APPLIES TOWARD THE GLASS ENGAGING FACE OF SAID MOLD END PORTION WHEN THE GLASS RETAINING MEMBER CONTACTS THE UPPER SURFACE OF A HORIZONTALLY DISPOSED FLAT GLASS SHEET MOUNTED ON SAID MOLD FOR BENDING AND TO REVERSE THE THRUST OF SAID MOLD FOR BENDING AND TO REVERSE THE THRUST OF SAID WEIGHT MEANS TO URGE SAID GLASS RETAINING MEMBER TOWARD SAID GLASS ENGAGING FACE OF SAID MOLD END PORTION TO CLAMP THE END PORTION OF THE CURVED GLASS SHEET BETWEEN SAID GLASS RETAINING MEMBER AND SAID GLASS ENGAGING FACE OF SAID MOLD END PORTION IN RESPONSE TO THE BENDING OF SAID END PORTION OF SAID GLASS SHEET.
Claim 3
Dependent Claim
124 words
IN THE ART OF BENDING GLASS SHEETS WHEREIN GLASS SHEET IS SOFTENED BY THE APPLICATION OF HEAT THERETO INTO CONFORMANCE WITH A CURVED SHAPING SURFACE, AND WHEREIN AN EXTREMITY PORTION OF HTE GLASS SHEET AFTER BENDING IS SANDWICHED IN PRESSURE ENGAGEMENT BETWEEN AN EXTREMITY PORTION OF THE SHAPING SURFACE ENGAGING ONE SURFACE THEREOF AND A MEMBER ENGAGING THE OTHER SURFACE THEREOF, THE IMPROVEMENT COMPRISING APPLYING A FORCE TO SAID MEMBER IN A GIVEN DIRECTION DURING THE EARLY STAGES OF SAID BENDING, REVERSING THE DIRECTION OF SAID FORCE APPLIED TO SAID MEMBER SO AS TO AUGMENT THE PRESSURE ENGAGING FORCE SAID MEMBER APPLIES AGAINST SAID OTHER SURFACE, AND MAINTAINING THE REVERSED DIRECTION OF SAID APPLIED FORCE ON SAID MEMBER DURING THE FINAL STAGES OF BENDING.
Claim 4
Dependent Claim
124 words
IN THE ART OF BENDING GLASS SHEETS WHEREIN GLASS SHEET IS SOFTENED BY THE APPLICATION OF HEAT THERETO INTO CONFORMANCE WITH A CURVED SHAPING SURFACE, AND WHEREIN AN EXTREMITY PORTION OF HTE GLASS SHEET AFTER BENDING IS SANDWICHED IN PRESSURE ENGAGEMENT BETWEEN AN EXTREMITY PORTION OF THE SHAPING SURFACE ENGAGING ONE SURFACE THEREOF AND A MEMBER ENGAGING THE OTHER SURFACE THEREOF, THE IMPROVEMENT COMPRISING APPLYING A FORCE TO SAID MEMBER IN A GIVEN DIRECTION DURING THE EARLY STAGES OF SAID BENDING, REVERSING THE DIRECTION OF SAID FORCE APPLIED TO SAID MEMBER SO AS TO AUGMENT THE PRESSURE ENGAGING FORCE SAID MEMBER APPLIES AGAINST SAID OTHER SURFACE, AND MAINTAINING THE REVERSED DIRECTION OF SAID APPLIED FORCE ON SAID MEMBER DURING THE FINAL STAGES OF BENDING.
Claim 5
Dependent Claim
107 words
IN THE ART OF BENDING GLASS SHEETS WHEREIN A GLASS SHEET IS SOFTENED BY THE APPLICATION OF HEAT THERETO INTO CONFORMANCE WITH A CURVED SHAPING SURFACE, AND WHEREIN SAID GLASS SHEET IS SANDWICHED BETWEEN OPPOSING MEMBERS HAVING SHAPES CONFORMING TO THAT DESIRED FOR THE BENT GLASS SHEET, THE IMPROVEMENT COMPRISING ENGAGING ONE OF THE OPPOSITE SIDE OF THE GLASS SHEET AT ITS PERIPHERY ALONG IT ENTIRE LENGTH AND THE OTHER SIDE AT SPACED PORTIONS ONLY OF ITS PERIPHERY ADJACENT THE LONGITUDINAL EXTREMITIES THEREOF THROUGHOUT THE BENDIGN CYCLE WITH RIGID MEMBERS AND ENGAGING SAID ONE SIDE OF THE GLASS INWARDLY OF SAID RIGID MEMBERS WITH A RESILIENT MEMBER.
Claim 6
Dependent Claim
107 words
IN THE ART OF BENDING GLASS SHEETS WHEREIN A GLASS SHEET IS SOFTENED BY THE APPLICATION OF HEAT THERETO INTO CONFORMANCE WITH A CURVED SHAPING SURFACE, AND WHEREIN SAID GLASS SHEET IS SANDWICHED BETWEEN OPPOSING MEMBERS HAVING SHAPES CONFORMING TO THAT DESIRED FOR THE BENT GLASS SHEET, THE IMPROVEMENT COMPRISING ENGAGING ONE OF THE OPPOSITE SIDE OF THE GLASS SHEET AT ITS PERIPHERY ALONG IT ENTIRE LENGTH AND THE OTHER SIDE AT SPACED PORTIONS ONLY OF ITS PERIPHERY ADJACENT THE LONGITUDINAL EXTREMITIES THEREOF THROUGHOUT THE BENDIGN CYCLE WITH RIGID MEMBERS AND ENGAGING SAID ONE SIDE OF THE GLASS INWARDLY OF SAID RIGID MEMBERS WITH A RESILIENT MEMBER.
References Cited (Backward Citations)
US760959A
Cited
US1889881A
Cited
US2167318A
Cited
US2003383A
Cited
US2189006A
Cited
US2251159A
Cited
US2213406A
Cited
US2348279A
Cited
US2560599A
Cited
US2518896A
Cited
US2663974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |