Apparatus for and method of gauge distribution in plastic tubing
Abstract
Abstract METHOD OF PRODUCING THERMOPLASTIC FILM INCLUDING THE STEPS OF EXTRUDING THERMOPLASTIC MATERIAL FROM AN ANNULAR DIE IN THE FORM OF A TUBE; TRANSPORTING THE TUBE IN A FIRST DIRECTION AWAY FROM THE ANNULAR DIE; FLATTENING THE TUBE BY PASSING IT BETWEEN A PAIR OF NIP ROLLS; CHANGING THE PATH OF TRAVEL OF THE FLATTENED TUBE FROM THE FIRST DIRECTION TO A DIRECTION OF 90* TO THE FIRST DIRECTION; TURNING THE FLATTENED TUBE ABOUT A LINE WHICH IS COAXIAL WITH THE ANNULAR DIE, THE NIP ROLLS BEING OSCILLATED RELATIVE TO THE ANNULAR DIE; AND, PASSING THE FLATTENED TUBE INTO CONTACT WITH A TAKEOFF WHICH IS FIXED REALTIVE TO THE ANNULAR DIE, THE DISTANCE BETWEEN THE TAKEOFF ROLL AND THE LINE ABOUT WHICH THE FLATTENED TUBE IS TURNED REMAINING CONSTANT DURING THE OSCILLATING MOTION. APPARATUS IS PROVIDED FOR PERFORMING THE ABOVE METHOD.
Inventors
- 👤 Gerald Benjamin Dyer
- 👤 Peter H Gray
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |