US3551956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection mold having preform securing means
Assignee: Individual
•
Filing: 1968-04-10
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Granted: 1971-01-05
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Expires: 1988-04-10
Abstract
Abstract A MOULD IS PROVIDED FOR CASTING AN ELEMENT ONTO A SHEET AND THE MOULD HAS TWO ELEMENTS JOINED ALONG A JOINT PLANE AND DEFINING A MOULD CAVITY. A SHEET IS CLAMPED BETWEEN THE MOULD ELEMENTS AND IS POSITIONED IN THE MOULD CAVITY ALONG THE JOINT PLANE. A PLASTIC MATERIAL IS INJECTED THROUGH AN INLET ORIFICE AND IS JOINED WITH THE SHEET. THE MOULD ELEMENTS ARE PROVIDED WITH RESPECTIVE PROJECTIONS EXTENDING INTO THE MOULD CAVITY IN OPPOSITE DIRECTIONS BEYOND THE JOINT PLANE TO CONTACT THE SHEET AND PRODUCE UNDULATIONS THEREIN IN ORDER TO TENSION THE SHEET DURING THE MOULDING PROCESS. THE PROJECTIONS ARE ARRANGED IN ALTERNATING RELATION EITHER IN LINEAR OR ANNULAR ARRAY.
Inventors
- 👤 Jean-Jacques Rosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:12
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14065; B29C2045/14122
Claims Analysis
Total Claims: 0
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References 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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |