Patent US3148231A successfully refreshed from Google Patents.
US3148231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic extrusion, apparatus and control
Assignee: Eastman Kodak Co
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Filing: 1961-03-20
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Granted: 1964-09-08
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Spencer Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/38; B29C48/365; B29C48/37; B29C48/387; B29C48/395; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92314; B29C2948/92323; B29C2948/92466; B29C2948/92504; B29C2948/92542; B29C2948/9258; B29C2948/9259; B29C2948/926; B29C2948/92704; B29C2948/92809; B29C2948/92819; B29C2948/92838; B29C2948/92857; B29C2948/92876; B29C2948/92895; B29C2948/92952; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A PROCESS FOR CONTINUOUSLY ADVANCING AT A CONSTANT RATE A STREAM OF HOMOGENEOUS COMPLETELY SOFTENED PLASTIC MATERIAL ADAPTED TO BE FORMED BY SHAPING MEANS INTO AN ELONGATED SHAPE HAVING UNIFORM DIMENSIONS CONPRISING (1) PLASTICIATING SAID PLASTIC MATERIAL UNDER REGULATED HEAT AND PRESSURE WHEREBY IT IS FORMED INTO A HOMOGENEOUS AND COMPLETELY SOFTENED STREAM FLOWING AT A VARIABLE RATE, (2) TRANSFERRING SAID STREAM FLOWING AT A VARIABLE RATE, (2) TRANSFERRING SAID STREAM OF PLASTIC MATERIAL UNDER PRESSURE TO A METERING MACHINE WHICH COMPRISES A HEATREGULATED CYLINDER CONTAINING A METERING SCREW DRIVEN AT A PREDETERMINED RATE, (3) MEASURING THE PRE-METERING PRESSURE OF SAID STREAM WHILE BEING TRANSFERRED TO SAID METERING MACHINE, (4) TRANSFERRING SAID STREAM TO SHAPING MEANS, (5) MEASURING THE POST-METERING PRESSURE OF SAID STREAM WHILE BEING TRANSFERRED TO SAID SHAPING MEANS, AND (6) REGULATING THE PRE-METERING PRESSURE AND THE DIFFERENTIAL PRESSURE IN RELATIONSHIP TO SAID PLASTICIATING FLOW RATE AND SAID METERING SCREW RATE, WHEREBY SAID STREAM BEING TRANSFERRED TO SAID SHAPING MEANS FLOWS AT A CONSTANT RATE, SAID DIFFERENTIAL PRESSURFE BEING SAID PRE-METERING PRESSURE MINUS SAID POST-METERING PRESSURE.
Claim 2
Dependent Claim
178 words
A PROCESS FOR CONTINUOUSLY ADVANCING AT A CONSTANT RATE A STREAM OF HOMOGENEOUS COMPLETELY SOFTENED PLASTIC MATERIAL ADAPTED TO BE FORMED BY SHAPING MEANS INTO AN ELONGATED SHAPE HAVING UNIFORM DIMENSIONS CONPRISING (1) PLASTICIATING SAID PLASTIC MATERIAL UNDER REGULATED HEAT AND PRESSURE WHEREBY IT IS FORMED INTO A HOMOGENEOUS AND COMPLETELY SOFTENED STREAM FLOWING AT A VARIABLE RATE, (2) TRANSFERRING SAID STREAM FLOWING AT A VARIABLE RATE, (2) TRANSFERRING SAID STREAM OF PLASTIC MATERIAL UNDER PRESSURE TO A METERING MACHINE WHICH COMPRISES A HEATREGULATED CYLINDER CONTAINING A METERING SCREW DRIVEN AT A PREDETERMINED RATE, (3) MEASURING THE PRE-METERING PRESSURE OF SAID STREAM WHILE BEING TRANSFERRED TO SAID METERING MACHINE, (4) TRANSFERRING SAID STREAM TO SHAPING MEANS, (5) MEASURING THE POST-METERING PRESSURE OF SAID STREAM WHILE BEING TRANSFERRED TO SAID SHAPING MEANS, AND (6) REGULATING THE PRE-METERING PRESSURE AND THE DIFFERENTIAL PRESSURE IN RELATIONSHIP TO SAID PLASTICIATING FLOW RATE AND SAID METERING SCREW RATE, WHEREBY SAID STREAM BEING TRANSFERRED TO SAID SHAPING MEANS FLOWS AT A CONSTANT RATE, SAID DIFFERENTIAL PRESSURFE BEING SAID PRE-METERING PRESSURE MINUS SAID POST-METERING PRESSURE.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |