Transverse filament reinforcing tape and methods and apparatus for the production thereof
Abstract
Abstract A longitudinally extending nonwoven tape comprising longitudinally extending tacking strands supporting a multiplicity of transverse filament bundles. The tape is manufactured by continuously depositing adhering coated tacking strands onto both sides of a 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 the tacking stand. The band is then passed against a cutter which serves 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.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |