Apparatus for forming parisons and control means therefor
Abstract
Abstract AN APPARATUS FOR CONTROLLING THE WALL THICKNESS AND WEIGHT OF A PAIR OF SIMULTANEOUSLY EXTRUDED PLASTIC TUBINGS. THE APPARATUS INCLUDES A PROGRAMMER FOR CONTROLLING THE WEIGHT AND WALL THICKNESS OF EACH OF A PAIR OF SIMULTANEOUSLY EXTRUDED TUBINGS, SAID PROGRAMMER BEING CONSTRUCTED FOR USE WITH AN EXTRUDER HEAD HAVING A PAIR OF OUTLET ORIFICES, EACH ORIFICE BEING FORMED BY FIRST AND SECOND MEMBERS, ONE OF SAID MEMBERS BEING MOUNTED FOR RELATIVE MOVEMENT WITH RESPECT TO THE OTHER MEMBER, THE PROGRAMMER COMPRISES MEANS FOR PROGRAMMING THE WALL THICKNESS AND WEIGHT OF THE PLASTIC TUBINGS TO BE FORMED, MEANS CONTROLLED BY SAID PROGRAMMING MEANS AND CONSTRUCTED FOR EFFECTING, DURING THE EXTRUDING OF PLASTIC TUBINGS, SIMULTANEOUS MOVEMENT OF BOTH OF THE FIRST MEMBERS OF THE EXTRUDER RELATIVE TO THE SECOND MEMBERS IN THE SAME DIRECTION BY THE SAME AMOUNT TO VARY THE WALL THICKNESS AND WEIGHT OF BOTH OF THE PLASTIC TUBINGS TO BE EXTRUDED, AND MEANS CONSTRUCTED FOR POSITIONING THE FIRST MEMBER OF ONE OF THE ORIFICES OF THE EXTRUDER IN A PREDETERMINED MANNER WITH RESPECT TO THE POSITION OF THE FIRST MEMBER OF THE OTHER ORIFICE.
Inventors
- 👤 Roger C Marolf
- 👤 Clement V Fogelberg
- 👤 William D Hough
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |