Method for longitudinal reinforcing plastic pipes
Abstract
Abstract THE TACKING STRAND. THE BAND IS THEN PASSED AGAINST A CUTTER WHICH SEVERS THE WOUND FILAMENTS BETWEEN THE BANDS AND PERMITS THE LONGITUDINALLY EXTENDING TAPE TO BE REMOVED FROM THE BAND. THE TAPE IS USED TO PROVIDE LONGITUDINAL REINFORCEMENT OF REINFORCED PLASTIC PIPE BY WINDING THE TAPE AROUND THE MANDREL IN THE PIPE FABRICATION PROCESS. A LONGITUDINALLY EXTENDING NONWOVEN TAPE COMPRISING LONGITUDINALLY EXTENDING TACKING STRANDS SUPPORTING A MULTIPLICITY OF TRANSVERSE FILAMENT BUNDLES. THE TAPE IS MANUFACTURED BY CONTINUOUSLY DEPOSITING ADHESIVE COATED TACKING STRANDS ONTO BOTH SIDES OF CONTINUOUS MOVING DOUBLE BAND AND CONTINUOUSLY WINDING FILAMENT BUNDLES OVER SAID STRANDS AND AROUND SAID BAND. THE BAND IS PASSED BETWEEN ROLLERS AND HEATED TO BOND THE FILAMENT TO
Inventors
- 👤 James L Grosh
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |