Molding machines
Abstract
Abstract A MOLDING MACHINE HAVING COOPERATING SHIFTABLE LOWER AND UPPER DIE FRAMES, THE UPPER HAVING CAVITIES AND LOWER HAVING PLUG ASSISTS FOR URGING A THERMOPLASTIC WEB INTO THE CAVITIES BY THE PLUG ASSISTS RESPONSIVE TO SHIFTING OF THE FRAMES. A WATER COOLED STRIPPLING PLATE IS SHIFTABLE ON THE UNDERSIDE OF THE UPPER FRAME AND STRIPS THE WEB FROM THE UPPER FRAME. A WEB CLAMPING FRAME IS SHIFTABLE WITH RESPECT TO THE LOWER FRAME AND HAS AN INDIVIDUAL CLAMPING RING AROUND EACH PLUG ASSIST AND A PERIPHERAL CLAMPING RIM FOR ENGAGING THE WEB. A PRESSURE APPLICATOR IS ALSO DISPOSED AROUND EACH PLUG ASSIST ENABLING POSITIVE PRESSURE INJECTION AROUND THE PLUG ASSIST. A VACUUM IS CREATED AROUND THE INSIDE OF EACH OF THE CAVITIES. A VACUUM IS CREATED BETWEEN THE UPPER DIE FRAME ASSEMBLY AND THE WEB WHEN THE CLAMPING FRAME IS SHIFTED UPWARDLY.
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Bibliographic Details
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |