US3303247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion head for plastic tubing
Assignee: United Plastic Corp
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Filing: 1964-09-21
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Granted: 1967-02-07
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Charles E Carter
- 👤 Jr Stanley C Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:41
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN AN EXTRUSION HEAD FOR THE EXTRUSION OF PLASTIC TUBING WHICH IS PROVIDED WITH AMANDREL, A DIE, MEANS FOR INTRODUCING PLASTIC INTO THE ANNULAR SPACE BETWEEN THE MANDREL AND THE EXTRUSION HEAD AND DIE, THE IMPROVEMENT WHICH COMPRISES; (A) MEANS FOR INTRODUCING THE MATERIAL TO BE EXTRUDED IN THE FORM OF TUBING IN THE SHAPE OF A RIBBON, MEANS IN THE EXTRUSION HEAD TO DIVIDE AND TURN THE RIBBON INTO THE ANNULAR SPACE BETWEEN MANDREL AND HEAD, SAID MEANS BEING POSITIONED SO THAT THE TURN OF THE RIBBON IS ABOUT THE SHORT AXIS OF THE RIBBON WHICH IS ALONG THE LONG DIMENSION OF A CROSS-SECTION THEREOF, WHEREBY THE PLASTIC INTRODUCED INTOTHE ANNULAR SPACE WITHOUT FORMING NOUNIFORMITES ON ONE SIDE OF THE TUBE.
Claim 2
Dependent Claim
122 words
IN AN EXTRUSION HEAD FOR THE EXTRUSION OF PLASTIC TUBING WHICH IS PROVIDED WITH AMANDREL, A DIE, MEANS FOR INTRODUCING PLASTIC INTO THE ANNULAR SPACE BETWEEN THE MANDREL AND THE EXTRUSION HEAD AND DIE, THE IMPROVEMENT WHICH COMPRISES; (A) MEANS FOR INTRODUCING THE MATERIAL TO BE EXTRUDED IN THE FORM OF TUBING IN THE SHAPE OF A RIBBON, MEANS IN THE EXTRUSION HEAD TO DIVIDE AND TURN THE RIBBON INTO THE ANNULAR SPACE BETWEEN MANDREL AND HEAD, SAID MEANS BEING POSITIONED SO THAT THE TURN OF THE RIBBON IS ABOUT THE SHORT AXIS OF THE RIBBON WHICH IS ALONG THE LONG DIMENSION OF A CROSS-SECTION THEREOF, WHEREBY THE PLASTIC INTRODUCED INTOTHE ANNULAR SPACE WITHOUT FORMING NOUNIFORMITES ON ONE SIDE OF THE TUBE.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |