Aspirator jet for drawing-off filaments
Abstract
Abstract In an aspirator jet for drawing-off thermoplastic filaments having a nozzle and a throat, the primary aspirating air is smoothly expanded to supersonic velocities through a throat into an outwardly diverging expansion chamber which is preferably dome-shaped. A guide tube for the filaments and secondary air extends centrally through the throat and through the expansion chamber to the draw-off tube, which has a constant diameter. The design is such that the aspirating air flows parallel to the filaments issuing from the guide tube and goes not impinge thereon as is the case with the jet designs of the prior art. This design permits draw-off of filaments at high speeds, in excess of 2,000 meters/min., with good separation and substantially complete parallelism between the filaments and without intermingling or twisting and interlocking of the filaments.
Inventors
- 👤 Oskar Dorschner
- 👤 Franz Josef Carduck
- 👤 Christoph Storkebaum
- 👤 Claus Rother
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |