Plugging device for extrusion container
Abstract
Abstract A DEVICE FOR PLUGGING EXTRUSION CONTAINERS AND COMPRISING A DIE, A CYLINDRICAL DIE CAVITY CONTAINING THE BILLET TO BE EXTRUDED AND AN EXTRUSION RAM ASSOCIATED WITH A SLIDABLE PLUGGING BLOCK WHICH IS ADAPTED TO CLOSE OFF THE REAR END OF THE EXTRUSION CONTAINER AS CONSIDERED IN THE DIRECTION OF EXTRUSION. THE RELATIVE MOTION OF THE RAM ROD AND THE PLUGGING BLOCK CAUSES THE LUBRICANT TO BE INJECTED INTO THE EXTRUSION CONTAINER UNDER VERY HIGH PRESSURE, THE LUBRICANT BEING MAINTAINED PREFERABLY IN THE PLASTIC STATE AND AT A SUITABLE TEMPERATURE INSIDE AN ANNULAR FEED RESERVOIR WHICH IS FORMED BETWEEN THE RAM ROD AND THE PLUGGING BLOCK. ESSENTIALLY, SAID ANNULAR RESERVOIR COMMUNICATES THROUGH THE PLUGGING BLOCK WITH A COMPRESSION CHAMBER WHICH IS FILLED WITH LUBRICANT AND INTO WHICH THE ROD OF A PISTON IS ADAPTED TO PENETRATE IN LEAK-TIGHT MANNER, SAID PISTON BEING IN TURN INTENDED TO CARRY OUT A MOVEMENT OF DISPLACEMENT WITHIN A SEPARATE CYLINDER UNDER THE ACTION OF AN AUXILIARY DRIVING FLUID.
Inventors
- 👤 Charles Sauve
Bibliographic Details
Claims Analysis
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |