US3271064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making indefinite length flexible conduit
Assignee: Flexible Tubing Corp
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Filing: 1962-12-05
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Granted: 1966-09-06
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Expires: 1982-12-05
Abstract
No abstract record available.
Inventors
- 👤 Marcus A Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/74; B29C48/00; B29C48/15; B29C48/151; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A METHOD OF MAKING INDEFINITE LENGTH FLEXIBLE CONDUIT ON A CONTINUOUSLY ADVANCING AND ROTATING MANDREL SURFACE, THE IMPROVEMENT WHICH COMPRISES (A) FORMING A SPACED-TURN HELIX OF WIRE ABOUT THE MANDREL SURFACE, (B) FRESHLY EXTRUDING AN UNSET THERMOPLASTIC STRIP AT A TEMPERATURE ABOVE ITS SETTING TEMPERATURE DIRECTLY ABOVE THE WIRE AT AN UNSET AND A TACKY STAGE AND AT A RATE LESS THAN THE TANGENTIAL VELOCITY OF THE MANDREL SURFACE SO THAT THE STRIP NECKS DOWN TO PRODUCE A COVERING OF OVERLAPPING TURNS AROUND THE WIRE, (C) FLUID-BLASTING THE UNSET STRIP RADIALLY INTO CORRUGATED SHAPED OVER THE WIRE TURNS AND MANDREL SURFACE, AND (D) REMOVING THE THERMOPLASTIC STRIP WITH THE WIRE TURNS OFF THE MANDREL SURFACE IN THE FORM OF A CONDUIT AFTER THE THERMOPLASTIC SETS.
Claim 2
Dependent Claim
126 words
IN A METHOD OF MAKING INDEFINITE LENGTH FLEXIBLE CONDUIT ON A CONTINUOUSLY ADVANCING AND ROTATING MANDREL SURFACE, THE IMPROVEMENT WHICH COMPRISES (A) FORMING A SPACED-TURN HELIX OF WIRE ABOUT THE MANDREL SURFACE, (B) FRESHLY EXTRUDING AN UNSET THERMOPLASTIC STRIP AT A TEMPERATURE ABOVE ITS SETTING TEMPERATURE DIRECTLY ABOVE THE WIRE AT AN UNSET AND A TACKY STAGE AND AT A RATE LESS THAN THE TANGENTIAL VELOCITY OF THE MANDREL SURFACE SO THAT THE STRIP NECKS DOWN TO PRODUCE A COVERING OF OVERLAPPING TURNS AROUND THE WIRE, (C) FLUID-BLASTING THE UNSET STRIP RADIALLY INTO CORRUGATED SHAPED OVER THE WIRE TURNS AND MANDREL SURFACE, AND (D) REMOVING THE THERMOPLASTIC STRIP WITH THE WIRE TURNS OFF THE MANDREL SURFACE IN THE FORM OF A CONDUIT AFTER THE THERMOPLASTIC SETS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |