Device for extruding plastic material
Abstract
Abstract A DEVICE FOR EXTRUDING PLASTIC MATERIAL COMPRISES AN INTERMEDIATE ZONE INCLUDING A GEAR PUMP AND TWO OUTER FEEDING ZONES DISPOSED ON OPPOSITE SIDES OF THE INTERMEDIATE ZONE AND EACH INCLUDING CONVEYOR SCREWS CONVEYING THE MATERIAL TOWARD THE INTERMEDIATE ZONE. THE OUTER ZONES ARE SEPARATED FROM THE INTERMEDIATE ZONE BY PARTITION WALLS COMMUNICATION BETWEEN THE OUTER ZONES AND THE INTERMEDIATE ZONE IS EFFECTED ONLY THROUGH A RECESS IN EACH PARTITION WALL. THE RECESSES LEAD INTO A SPACE OF THE INTERMEDIATE ZONE DEFINED THEREIN BY TEETH OF THE GEARS OF THE PUMP WHEN APPROACHING THE MESHING POSITION. AN EXTRUSION PORT COMMUNICATES WITH A FURTHER SPACE IN THE INTERMEDIATE ZONE DEFINED THEREIN BY TEETH OF THE PUMP GEARS WHEN DEPARTING FROM THE MESHING ZONE.
Inventors
- 👤 Rudolf Paul Fritsch
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |