US2747224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for continously forming elongated shapes from thermoplastic materials
Assignee: Polymer Corp
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Filing: 1952-08-06
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Granted: 1956-05-29
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Expires: 1972-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert B Koch
- 👤 Jr Ralph E James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:39
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/92; B29C48/03; B29C48/06; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/834; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92085; B29C2948/92095; B29C2948/92504; B29C2948/92514; B29C2948/92819; B29C2948/92828; B29C2948/92857; B29C2948/92904; Y; Y10; Y10S; Y10S138/00; Y10S138/03; Y10S264/00; Y10S264/56; Y10S264/61; Y10S388/00; Y10S388/923; Y10S388/929
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
EQUIPMENT FOR CONTINUOUSLY FORMING ELONGATED SHAPES FROM SOFTENED PLASTIC MATERIAL COMPRISING A SCREW FEED DEVICE FOR CONTINUOUSLY ADVANCING A STREAM OF THE SOFTENED PLASTIC MATERIAL UNDER PRESSURE, THE SCREW FEED DEVICE HAVING VARIABLE CONTROL MECHANISM FOR REGULATING THE SPEED OF THE SCREW, A HOLLOW FORMING DEVICE THROUGH WHICH SAID STREAM IS FORCED BY THE FEED DEVICE IN CONTACT WITH THE INTERIOR OF SAID FORMING DEVICE TO IMPART THE DESIRED SHAPE THERETO, A CONNECTION BETWEEN THE SCREW DEVICE AND THE FORMING DEVICE HAVING A PASSAGE FOR DELIVERING SAID STREAM FROM THE FORMER TO THE LATTER, A PRESSURE RESPONSIVE ELEMENT IN SAID PASSAGE, AND A CONTROL CONNECTION BETWEEN THE PRESSURE RESPONSIVE ELEMENT AND THE CONTROL MECHANISM OF THE SCREW FEED DEVICE ACTING TO DECREASE THE SCREW SPEED WHEN THE PRESSURE IN SAID PASSAGE EXCEEDS A MEDIAN VALUE AND TO INCREASE THE SCREW SPEED WHEN THE PRESSURE IN SAID PASSAGE FALLS BELOW SAID MEDIAN VALUE.
Claim 2
Dependent Claim
152 words
EQUIPMENT FOR CONTINUOUSLY FORMING ELONGATED SHAPES FROM SOFTENED PLASTIC MATERIAL COMPRISING A SCREW FEED DEVICE FOR CONTINUOUSLY ADVANCING A STREAM OF THE SOFTENED PLASTIC MATERIAL UNDER PRESSURE, THE SCREW FEED DEVICE HAVING VARIABLE CONTROL MECHANISM FOR REGULATING THE SPEED OF THE SCREW, A HOLLOW FORMING DEVICE THROUGH WHICH SAID STREAM IS FORCED BY THE FEED DEVICE IN CONTACT WITH THE INTERIOR OF SAID FORMING DEVICE TO IMPART THE DESIRED SHAPE THERETO, A CONNECTION BETWEEN THE SCREW DEVICE AND THE FORMING DEVICE HAVING A PASSAGE FOR DELIVERING SAID STREAM FROM THE FORMER TO THE LATTER, A PRESSURE RESPONSIVE ELEMENT IN SAID PASSAGE, AND A CONTROL CONNECTION BETWEEN THE PRESSURE RESPONSIVE ELEMENT AND THE CONTROL MECHANISM OF THE SCREW FEED DEVICE ACTING TO DECREASE THE SCREW SPEED WHEN THE PRESSURE IN SAID PASSAGE EXCEEDS A MEDIAN VALUE AND TO INCREASE THE SCREW SPEED WHEN THE PRESSURE IN SAID PASSAGE FALLS BELOW SAID MEDIAN VALUE.
Claim 3
Independent Claim
99 words
A METHOD FOR CONTINUOUSLY FORMING ELONGATED SHAPES FROM SOFTENED THERMOPLASTIC MATERIAL, COMPRISING CONTINUOUSLY FEEDING A STREAM OF SOFTENED MATERIAL UNDER PRESSURE INTO THE INLET END OF A FORMING DEVICE HAVING OPEN INLET AND DISCHARGE ENDS, COOLING THE MATERIAL TO THE POINT OF SOLIDIFICATION DURING PASSAGE THEREOF THROUGH THE FORMING DEVICE IN CONTACT WITH THE INTERIOR OF SAID FORMING DEVICE, ESTABLISHING AND MAINTAINING A SUBSTANTIALLY UNIFORM RATE OF DELIVERY OF THE SOLIDIFIED SHAPE FROM DISCHARGE END OF SAID FORMING DEVICE, AND ESTABLISHING AND MAINTAINING A SUBSTANTIALLY UNIFORM PRESSURE OF THE SOFTENED MATERIAL IN THE INLET END OF THE FORMING DEVICE.
Claim 4
Independent Claim
99 words
A METHOD FOR CONTINUOUSLY FORMING ELONGATED SHAPES FROM SOFTENED THERMOPLASTIC MATERIAL, COMPRISING CONTINUOUSLY FEEDING A STREAM OF SOFTENED MATERIAL UNDER PRESSURE INTO THE INLET END OF A FORMING DEVICE HAVING OPEN INLET AND DISCHARGE ENDS, COOLING THE MATERIAL TO THE POINT OF SOLIDIFICATION DURING PASSAGE THEREOF THROUGH THE FORMING DEVICE IN CONTACT WITH THE INTERIOR OF SAID FORMING DEVICE, ESTABLISHING AND MAINTAINING A SUBSTANTIALLY UNIFORM RATE OF DELIVERY OF THE SOLIDIFIED SHAPE FROM DISCHARGE END OF SAID FORMING DEVICE, AND ESTABLISHING AND MAINTAINING A SUBSTANTIALLY UNIFORM PRESSURE OF THE SOFTENED MATERIAL IN THE INLET END OF THE FORMING DEVICE.
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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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |