US3244786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion process and apparatus therefor
Assignee: Imperial Chemical Industries Ltd
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Filing: 1963-06-24
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Granted: 1966-04-05
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Bild Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C48/00; B29C48/03; B29C48/04; B29C48/05; B29C48/07; B29C48/08; B29C48/14; B29C48/25; B29C48/88; B29C48/911; B29C48/919; B29C48/06; B29C48/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A PROCESS FOR PREVENTING CONTAMINATION OF AN EXTRUDED PROFILE OF A COMPOSITION BY A DISCOLOURED COLLAR OF THE SAID COMPOSITION TEMPORARILY ADHERENT TO THE DIE FACE IMMEDIATELY SURROUNDING THE EXTRUSION ORIFICE, WHEREIN SAID COMPOSITION CONTAINS A THERMOPLASTIC POLYMERIC MATERIAL AND GLASS FIBERS, SAID PROCESS COMPRISING THE STEPS OF, COOLING THE AREA IMMEDIATELY ADJACENT TO AND SURROUNDING THE EXTRUSION ORIFICE, BY A DIRECTED BLAST OF COOLING GAS, AND SUPPLYING THE GAS AT SUCH A RATE THAT THE SAID COMPOSITION IS MAINTAINED WHILE IT IS ADHERENT TO THE DIE FACE AT A TEMPERATURE BELOW THAT AT WHICH THERMAL DEGRADATION OR THERMALLY INDUCED REACTION WITH THE GAS CAN OCCUR.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PREVENTING CONTAMINATION OF AN EXTRUDED PROFILE OF A COMPOSITION BY A DISCOLOURED COLLAR OF THE SAID COMPOSITION TEMPORARILY ADHERENT TO THE DIE FACE IMMEDIATELY SURROUNDING THE EXTRUSION ORIFICE, WHEREIN SAID COMPOSITION CONTAINS A THERMOPLASTIC POLYMERIC MATERIAL AND GLASS FIBERS, SAID PROCESS COMPRISING THE STEPS OF, COOLING THE AREA IMMEDIATELY ADJACENT TO AND SURROUNDING THE EXTRUSION ORIFICE, BY A DIRECTED BLAST OF COOLING GAS, AND SUPPLYING THE GAS AT SUCH A RATE THAT THE SAID COMPOSITION IS MAINTAINED WHILE IT IS ADHERENT TO THE DIE FACE AT A TEMPERATURE BELOW THAT AT WHICH THERMAL DEGRADATION OR THERMALLY INDUCED REACTION WITH THE GAS CAN OCCUR.
Claim 3
Dependent Claim
85 words
APPARATUS FOR PREVENTING CONTAMINATION OF AN EXTRUDED PROFILE OF A COMPOSITION CONTAINING A THERMOPLASTIC POLYMERIC MATERIAL AND GLASS FIBERS BY A DISCOLOURED COLLAR OF SAID COMPOSITION TEMPORARILY ADHERENT TO THE DIE FACE IMMEDIATELY SURROUNDING THE EXTRUSION ORIFICE, WHICH COMPRISES MEANS FOR DIRECTING A STREAM OF GAS AT THE AREA IMMEDIATELY ADJACENT TO SAID EXTRUSION ORIFICE AND WHEREIN THE DIE IS SO SHAPED THAT AT THE POINT WHERE SAID EXTRUDED PROFILE LEAVES SAID ORIFICE, THE FACE OF SAID DIE CONTACTS SAID PROFILE AT SUBSTANTIALLY A TANGENT.
Claim 4
Dependent Claim
85 words
APPARATUS FOR PREVENTING CONTAMINATION OF AN EXTRUDED PROFILE OF A COMPOSITION CONTAINING A THERMOPLASTIC POLYMERIC MATERIAL AND GLASS FIBERS BY A DISCOLOURED COLLAR OF SAID COMPOSITION TEMPORARILY ADHERENT TO THE DIE FACE IMMEDIATELY SURROUNDING THE EXTRUSION ORIFICE, WHICH COMPRISES MEANS FOR DIRECTING A STREAM OF GAS AT THE AREA IMMEDIATELY ADJACENT TO SAID EXTRUSION ORIFICE AND WHEREIN THE DIE IS SO SHAPED THAT AT THE POINT WHERE SAID EXTRUDED PROFILE LEAVES SAID ORIFICE, THE FACE OF SAID DIE CONTACTS SAID PROFILE AT SUBSTANTIALLY A TANGENT.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |