US3275723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for manufacturing tubular films of synthetic thermoplastic materials
Assignee: Montedison SpA
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Filing: 1964-06-09
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Granted: 1966-09-27
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Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Vittorio E Cappuccio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/28; B29C48/00; B29C48/001; B29C48/0018; B29C48/0019; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PROCESS OF MANUFACTURING A TUBULAR FILM OF A SYNTHETIC THEREMOPLASTIC MATERIAL, COMPRISING EXTRUDING A FILM TUBING OF SAID MATERIAL IN A HEAT-SOFTENED CONDITION INTO A QUENCHING LIQUID BATH AND PULLING SAID FILM THROUGH SAID BATH IN COLLAPSED CONDITION, THE IMPROVEMENT COMPRISING PULLING THE QUENCHED FILM TUBING OUTSIDE THE BATH IN AN UPWARD SUBSTANTIALLY VERTICAL DIRECTION, FORMING AND MAINTAINING A SPATIALLY STATIONARY BUBLE OF SAID TUBING EXTENDING IN AID DIRECTION, WHILE EXTRUDING AND PULLING THE TUBING, AND APPLYING TO SAID BUBBLE A VIBRATORY FIELD DIRECTED SUBSTANTIALLY TRANSVERSELY TO SAID DIRECTION TO THEREBY DISLODGE ANY DROPLETS OF LIQUID FROM THE INNER SURFACE OF THE BUBBLE AND COLLECT THEM IN A BOTTOM SECTION OF THE LATTER.
Claim 2
Dependent Claim
115 words
IN A PROCESS OF MANUFACTURING A TUBULAR FILM OF A SYNTHETIC THEREMOPLASTIC MATERIAL, COMPRISING EXTRUDING A FILM TUBING OF SAID MATERIAL IN A HEAT-SOFTENED CONDITION INTO A QUENCHING LIQUID BATH AND PULLING SAID FILM THROUGH SAID BATH IN COLLAPSED CONDITION, THE IMPROVEMENT COMPRISING PULLING THE QUENCHED FILM TUBING OUTSIDE THE BATH IN AN UPWARD SUBSTANTIALLY VERTICAL DIRECTION, FORMING AND MAINTAINING A SPATIALLY STATIONARY BUBLE OF SAID TUBING EXTENDING IN AID DIRECTION, WHILE EXTRUDING AND PULLING THE TUBING, AND APPLYING TO SAID BUBBLE A VIBRATORY FIELD DIRECTED SUBSTANTIALLY TRANSVERSELY TO SAID DIRECTION TO THEREBY DISLODGE ANY DROPLETS OF LIQUID FROM THE INNER SURFACE OF THE BUBBLE AND COLLECT THEM IN A BOTTOM SECTION OF THE LATTER.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |