Patent US3284552A successfully refreshed from Google Patents.
US3284552A
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Method for making tubing
Assignee: FMC Corp
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Filing: 1964-03-17
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Granted: 1966-11-08
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Expires: 1984-03-17
Abstract
No abstract record available.
Inventors
- 👤 Harold A Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:38
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/28; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29C48/88; B29C48/885; B29C48/90; B29C48/901; B29C48/902; B29C48/908; B29C48/911; B29C48/9115; B29C48/912; B29C48/918; B29C48/001; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF FORMING AND COLLECTING THERMOPLASTIC SEAMLESS TUBING INCLUDING THE STEPS OF CONTINUOUSLY EXTRUDING A FLOWABLE FILM-FORMING MATERIAL IN THE FORM OF A SEAMLESS TUBING HAVING LONGITUDINALLY EXTENDING ELEMENTS WHICH DIFFER IN THICKNESS, CONTINUOUSLY ADVANCING THE TUBING AWAY FROM THE POINT OF EXTRUSION AND ENGAGING ITS INTERNAL SURFACE WITH A MANDREL TO EXPAND THE TUBING TO A DESIRED SIZE, SETTING THE EXTRUDED TUBING CONCOMITANTLY WITH THE ADVANCEMENT THEREOF, COLLAPSING THE TUBING AFTER IT LEAVES THE MANDREL, COLLECTING THE FLATTENED TUBING IN THE FORM OF A ROLL, AND ROTATING THE MANDREL IN OPPOSITE DIRECTIONS TO OSCILLATE THE EXPANDED PORTION OF THE TUBING RELATIVE TO THE COLLAPSED PORTION THEREOF WHEREBY SUCCESSIVE CONVOLUTES OF AN ELEMENT OF THE TUBING ARE LATERALLY OFFSET FROM EACH OTHER ON SAID ROLL.
Claim 2
Independent Claim
126 words
A METHOD OF FORMING AND COLLECTING THERMOPLASTIC SEAMLESS TUBING INCLUDING THE STEPS OF CONTINUOUSLY EXTRUDING A FLOWABLE FILM-FORMING MATERIAL IN THE FORM OF A SEAMLESS TUBING HAVING LONGITUDINALLY EXTENDING ELEMENTS WHICH DIFFER IN THICKNESS, CONTINUOUSLY ADVANCING THE TUBING AWAY FROM THE POINT OF EXTRUSION AND ENGAGING ITS INTERNAL SURFACE WITH A MANDREL TO EXPAND THE TUBING TO A DESIRED SIZE, SETTING THE EXTRUDED TUBING CONCOMITANTLY WITH THE ADVANCEMENT THEREOF, COLLAPSING THE TUBING AFTER IT LEAVES THE MANDREL, COLLECTING THE FLATTENED TUBING IN THE FORM OF A ROLL, AND ROTATING THE MANDREL IN OPPOSITE DIRECTIONS TO OSCILLATE THE EXPANDED PORTION OF THE TUBING RELATIVE TO THE COLLAPSED PORTION THEREOF WHEREBY SUCCESSIVE CONVOLUTES OF AN ELEMENT OF THE TUBING ARE LATERALLY OFFSET FROM EACH OTHER ON SAID ROLL.
References Cited (Backward Citations)
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |