US3337663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing thin walled tubings or tubular or flat films from thermoplastic materials, and an apparatus thereof
Assignee: Individual
•
Filing: 1964-10-13
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Granted: 1967-08-22
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Expires: 1984-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jun Taga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:28
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/885; B29C48/03; B29C48/09; B29C48/10; B29C48/911; B29C48/9115; B29C48/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD OF PRODUCING CRYSTAL-CLEAR THIN-WALLED TUBING OF THERMOPLASTIC MATERIAL, COMPRISING THE STEPS OF; EXTRUDING MOLTEN THERMOPLASTIC MATERIAL DOWNWARDLY THROUGH AN ANNULAR DIE ORIFICE TO FORM TUBING; DRAWING THE TUBING THROUGH AN ANNULAR QUENCHING DISK BENEATH AND SUSTANTIALLY COAXIAL WITH THE ORIFICE; NIPPING THE MATERIAL BENEATH THE QUENCHING DISK TO CLOSE THE TUBING; SUPPLYING GAS UNDER PRESSURE TO THE INTERIOR OF THE TUBING ABOVE THE NIPPED PORTION THEREOF TO EXPAND THE TUBING INTO CONTACT WITH THE QUENCHING DISK INNER PERIPHER; MAINTAINING A CONSTANT DEPTH AND CONSTANTLY OVERFLOWING ANNULAR BODY OF QUENCHING LIQUID IN CONTACT WITH THE EXTERIOR SURFACE OF THE TUBING ABOVE THE QUENCHING DISK; CONTINUOUSLY REPLENISHING THE QUENCHING LIQUID, AT A RELATIVELY LOW PRESSURE, FROM BENEATH THE UPPER SURFACE OF THE ANNULAR BODY THEREOF TO MAINTAIN THE SURFACE OF THE ANNULAR BODY SMOOTH AND NONT-TURBULENT TO PREVENT FORMATION OF WRINKLES AND STREAKS INTHE SURFACE OF THE TUBING PASSING ON CONTACT WITH SAID ANNULAR BODY OF QUENCHING LIQUID; AND DIRECTING THE QUENCHING LIQUID TO FLWO RADIALLY INWARDLY FROM THE PERIPHERY OF THE QUENCHING DISK AND SUBSTANTIALLY PARALLEL TO THE UPPER SURFACE OF THE QUENCHING DISK.
Claim 2
Independent Claim
185 words
A METHOD OF PRODUCING CRYSTAL-CLEAR THIN-WALLED TUBING OF THERMOPLASTIC MATERIAL, COMPRISING THE STEPS OF; EXTRUDING MOLTEN THERMOPLASTIC MATERIAL DOWNWARDLY THROUGH AN ANNULAR DIE ORIFICE TO FORM TUBING; DRAWING THE TUBING THROUGH AN ANNULAR QUENCHING DISK BENEATH AND SUSTANTIALLY COAXIAL WITH THE ORIFICE; NIPPING THE MATERIAL BENEATH THE QUENCHING DISK TO CLOSE THE TUBING; SUPPLYING GAS UNDER PRESSURE TO THE INTERIOR OF THE TUBING ABOVE THE NIPPED PORTION THEREOF TO EXPAND THE TUBING INTO CONTACT WITH THE QUENCHING DISK INNER PERIPHER; MAINTAINING A CONSTANT DEPTH AND CONSTANTLY OVERFLOWING ANNULAR BODY OF QUENCHING LIQUID IN CONTACT WITH THE EXTERIOR SURFACE OF THE TUBING ABOVE THE QUENCHING DISK; CONTINUOUSLY REPLENISHING THE QUENCHING LIQUID, AT A RELATIVELY LOW PRESSURE, FROM BENEATH THE UPPER SURFACE OF THE ANNULAR BODY THEREOF TO MAINTAIN THE SURFACE OF THE ANNULAR BODY SMOOTH AND NONT-TURBULENT TO PREVENT FORMATION OF WRINKLES AND STREAKS INTHE SURFACE OF THE TUBING PASSING ON CONTACT WITH SAID ANNULAR BODY OF QUENCHING LIQUID; AND DIRECTING THE QUENCHING LIQUID TO FLWO RADIALLY INWARDLY FROM THE PERIPHERY OF THE QUENCHING DISK AND SUBSTANTIALLY PARALLEL TO THE UPPER SURFACE OF THE QUENCHING DISK.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |