US3158904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-forming machines
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1963-01-29
•
Granted: 1964-12-01
•
Expires: 1983-01-29
Abstract
No abstract record available.
Inventors
- 👤 Gray Thomas Edward Horace
- 👤 Jones-Hinton James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/261; B29C51/262
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A VACUUM FORMING MACHINE FOR FORMING SHEETS OF THERMOPLASTIC MATERIAL COMPRISING A MACHINE MEMBER HAVING A SHEET CLAMPING SURFACE, A CLAMPING FRAME MOVABLE TOWARDS AND AWAY FROM THE CLAMPING SURFACE DURING A CLAMPING OPERATION, A CLAMP BAR ENGAGEABLE WITH THE CLAMPING FRAME, A PLURALITY OF BOLTS ATTACHED TO AND SPACED ALONG THE LENGTH OF THE CLAMP BAR, A PLURALITY OF LOCKNUTS ATTACHED ONE TO EACH BOLT, AND MEANS OPERABLY CONNECTED TO THE CLAMP BAR TO MOVE THE CLAMP BAR INTO AND OUT OF ENGAGEMENT WITH THE CLAMPING FRAME AND TO APPLY CLAMPING PRESSURE, THROUGH THE BOLTS, TO THE CLAMPING FRAME.
Claim 2
Dependent Claim
100 words
A VACUUM FORMING MACHINE FOR FORMING SHEETS OF THERMOPLASTIC MATERIAL COMPRISING A MACHINE MEMBER HAVING A SHEET CLAMPING SURFACE, A CLAMPING FRAME MOVABLE TOWARDS AND AWAY FROM THE CLAMPING SURFACE DURING A CLAMPING OPERATION, A CLAMP BAR ENGAGEABLE WITH THE CLAMPING FRAME, A PLURALITY OF BOLTS ATTACHED TO AND SPACED ALONG THE LENGTH OF THE CLAMP BAR, A PLURALITY OF LOCKNUTS ATTACHED ONE TO EACH BOLT, AND MEANS OPERABLY CONNECTED TO THE CLAMP BAR TO MOVE THE CLAMP BAR INTO AND OUT OF ENGAGEMENT WITH THE CLAMPING FRAME AND TO APPLY CLAMPING PRESSURE, THROUGH THE BOLTS, TO THE CLAMPING FRAME.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |