Drawing of thermoplastic synthetic linear polymeric thread and localizing the neck portion of the thread
Abstract
Abstract A process for drawing a thermoplastic synthetic linear polymeric thread which comprises feeding the thread to a drawing zone; subjecting the thread to an axial load in the drawing zone whereby the thread necks down and is permanently deformed to form a neck portion therein; localizing the neck portion of the thread in the drawing zone and discharging the thread from the drawing zone. The neck portion in the thread is localized by measuring the temperature of the thread at the point where the neck portion is desired to be positioned, and when the neck portion moves away from its desired position, by changing at least one process parameter that affects the position of the neck in response to the temperature measurement so that the neck portion is caused to return to its desired position. Also an apparatus for carrying out this process and the resulting drawn thread are disclosed.
Inventors
- 👤 Hendrinus Sempel
Bibliographic Details
Claims Analysis
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |