US3296344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for expanding plastic tubing
Assignee: Radiation Dynamics Inc
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Filing: 1963-05-29
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Granted: 1967-01-03
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 Timmerman Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF EXPANDING HOLLOW PLASTIC TUBING COMPRISING FEEDING AN INDEFINITE LENGTH OF TAPE PARALLEL TO ITS LONGITUDINAL AXIS THROUGH A HOLLOW OPEN-ENDED MOLD, APPLYING THE FORCE FOR FEEDING THE TAPE ADJACENT THE EXIT END OF THE MOLD, FEEDING A HOLLOW TUBING THROUGH THE MOLD AT THE SAME RATE AT WHICH THE TAPE IS FED THERETHROUGH, APPLYING THE TUBE FEEDING FORCE TO THE TUBING BEFORE IT ENTERS THE MOLD, ENCASING THE TUBING IN THE TAPE BY FOLDING THE TAPE TO FORM A CYLINDER OF TAPE HAVINING A SINGLE LONGITUDINALLY EXTENDING SEAM, HEATING THE TUBING ABOVE ITS MELT POINT INTERIORLY OF THE MOLD, APPLYING A PRESSURE TO THE INTERIOR OF THE TUBING TO EXPAND THE TUBING AT THE TEMPERATURE EMPLOYED, COOLING THE TUBING BELOW
Claim 2
Independent Claim
123 words
A METHOD OF EXPANDING HOLLOW PLASTIC TUBING COMPRISING FEEDING AN INDEFINITE LENGTH OF TAPE PARALLEL TO ITS LONGITUDINAL AXIS THROUGH A HOLLOW OPEN-ENDED MOLD, APPLYING THE FORCE FOR FEEDING THE TAPE ADJACENT THE EXIT END OF THE MOLD, FEEDING A HOLLOW TUBING THROUGH THE MOLD AT THE SAME RATE AT WHICH THE TAPE IS FED THERETHROUGH, APPLYING THE TUBE FEEDING FORCE TO THE TUBING BEFORE IT ENTERS THE MOLD, ENCASING THE TUBING IN THE TAPE BY FOLDING THE TAPE TO FORM A CYLINDER OF TAPE HAVINING A SINGLE LONGITUDINALLY EXTENDING SEAM, HEATING THE TUBING ABOVE ITS MELT POINT INTERIORLY OF THE MOLD, APPLYING A PRESSURE TO THE INTERIOR OF THE TUBING TO EXPAND THE TUBING AT THE TEMPERATURE EMPLOYED, COOLING THE TUBING BELOW
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |