US3226766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizing and conveying device
Assignee: Georg Fischer AG
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Filing: 1963-02-13
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Granted: 1966-01-04
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Zelewsky Ottomar Von
- 👤 Burkert Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:20
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/395; B29C48/45; B29C48/03; B29C48/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A DEVICE FOR CONVEYING AND EXTRUDING THERMOPLASTIC SYNTHETIC MATERIALS, WHICH COMPRISES: ROTATABLE CONVEYING WORM MEANS INCREASING IN DIAMETER IN CONVEYING DIRECTION THEREOF FOR CONVEYING THE MATERIAL WHILE SIMULTANEOUSLY PLASTICIZING THE MATERIAL, HOUSING MEANS HAVING A FIRST CONICAL CAVITY RECEIVING SAID WORM MEANS AND CONFINING THEREWITH A CONVEYING PASSAGE, MEANS AT THE SMALLER END OF SAID FIRST CAVITY FOR FEEDING SAID MATERIAL THERETO, CONICAL MEANS FIXED TO SAID WORM MEANS AND HAVING ITS AXIS EXTENDING IN THE LONGITUDINAL DIRECTION OF THE AXIS OF ROTATION OF SAID WORM MEANS AND HAVING ITS LARGEST DIAMETER ADJACENT THE LARGEST DIAMETER OF SAID WORM MEANS, SAID HOUSING MEANS HAVING A SECOND CONICAL CAVITY RECEIVING SAID CONICAL MEANS AND CONFINING THEREWITH PASSAGE MEANS FOR COMMUNICATION WITH SAID CONVEYING PASSAGE, SAID CONICAL MEANS AND SAID SECOND CAVITY HAVING SMOOTH OPPOSED SURFACES, INJECTION NOZZLE MEANS MOUNTED IN SAID HOUSING MEANS SURROUNDING THE TIP PORTIONS OF SAID CONICAL MEANS AND COMMUNICATING WITH THE APEX END OF SAID SECOND CONICAL CAVITY, AND MEANS FOR ROTATING SAID WORM MEANS AND CONICAL MEANS.
Claim 2
Independent Claim
171 words
A DEVICE FOR CONVEYING AND EXTRUDING THERMOPLASTIC SYNTHETIC MATERIALS, WHICH COMPRISES: ROTATABLE CONVEYING WORM MEANS INCREASING IN DIAMETER IN CONVEYING DIRECTION THEREOF FOR CONVEYING THE MATERIAL WHILE SIMULTANEOUSLY PLASTICIZING THE MATERIAL, HOUSING MEANS HAVING A FIRST CONICAL CAVITY RECEIVING SAID WORM MEANS AND CONFINING THEREWITH A CONVEYING PASSAGE, MEANS AT THE SMALLER END OF SAID FIRST CAVITY FOR FEEDING SAID MATERIAL THERETO, CONICAL MEANS FIXED TO SAID WORM MEANS AND HAVING ITS AXIS EXTENDING IN THE LONGITUDINAL DIRECTION OF THE AXIS OF ROTATION OF SAID WORM MEANS AND HAVING ITS LARGEST DIAMETER ADJACENT THE LARGEST DIAMETER OF SAID WORM MEANS, SAID HOUSING MEANS HAVING A SECOND CONICAL CAVITY RECEIVING SAID CONICAL MEANS AND CONFINING THEREWITH PASSAGE MEANS FOR COMMUNICATION WITH SAID CONVEYING PASSAGE, SAID CONICAL MEANS AND SAID SECOND CAVITY HAVING SMOOTH OPPOSED SURFACES, INJECTION NOZZLE MEANS MOUNTED IN SAID HOUSING MEANS SURROUNDING THE TIP PORTIONS OF SAID CONICAL MEANS AND COMMUNICATING WITH THE APEX END OF SAID SECOND CONICAL CAVITY, AND MEANS FOR ROTATING SAID WORM MEANS AND CONICAL MEANS.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |