Patent US1750014A successfully refreshed from Google Patents.
US3264383A
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Extrusion methods
Assignee: KUNSTOFFWERK Gebr ANGER G
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Filing: 1963-08-28
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Granted: 1966-08-02
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Expires: 1983-08-28
Abstract
No abstract record available.
Inventors
- 👤 Niessner Rudolf
- 👤 Sonnleitner Max
- 👤 Wolf Karl Hermann
- 👤 Gutlhuber Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:41
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; B; B29; B29C; B29C57/00; B29C57/02; B29C57/04; B29C67/00; B29C67/0003; B29C67/0014; B29D; B29D23/00; B29D23/18; B29C2948/00; B29C2948/92; B29C2948/92323; B29C2948/92438; B29C2948/92504; B29C2948/9258; B29C2948/926; B29C2948/92609; B29C2948/92647; B29C48/00; B29C48/001; B29C48/0022; B29C48/03; B29C48/09; B29L; B29L2023/00; B29L2023/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PROCESS FOR THE PRODUCTION OF PLASTIC TUBES WHICH HAVE AT LEAST AT ONE END THEREOF AN INCREASED WALL THICKNESS FOR A PREDETERMINED LENGTH, SAIDROCESS COMPRISING CONTINUOUSLY ADVANCING PLASTIC MATERIAL THROUGH AN EXTRUDER TO PRODUCE A CONTINUOUS EXTRUDED CYLINDER, COOLING THE EXTRUDED CYLINDER AS IT IS DISCHARGED FROM THE EXTRUDER WHEREBY THE PLASTIC MATERIAL IS HARDENED THEREAT, ENGAGING THE THUS COOLED CYLINDER TO DRAW THE SAME THROUGH THE EXTRUDER AND PAST THE REGION WHERE THE CYLINDER IS COLLED, PERIODICALLY INCREASING THE RATIO OF THE SPEED AT WHICH THE MATERIAL IS FED TO THE EXTRUDER RELATIVE TO THE SPEED AT WHICH THE CYLINDER IS DRAWN FROM THE EXTRUDER TO UPSET THE TUBE WHERE IT IS DISCHARGED FROM THE EXTRUDER TO FORM PERIODIC INCREASES IN THICKNESS IN THE CYLINDER AND DIVIDING THE CYLINDER THUS FORMED WITH THE PERIODIC INCREASES IN THICKNESS TO PRODUCE TUBES WHICH HAVE INCREASED WALL THICKNESS AT LEAST AT ONE END THEREOF.
Claim 2
Dependent Claim
153 words
A PROCESS FOR THE PRODUCTION OF PLASTIC TUBES WHICH HAVE AT LEAST AT ONE END THEREOF AN INCREASED WALL THICKNESS FOR A PREDETERMINED LENGTH, SAIDROCESS COMPRISING CONTINUOUSLY ADVANCING PLASTIC MATERIAL THROUGH AN EXTRUDER TO PRODUCE A CONTINUOUS EXTRUDED CYLINDER, COOLING THE EXTRUDED CYLINDER AS IT IS DISCHARGED FROM THE EXTRUDER WHEREBY THE PLASTIC MATERIAL IS HARDENED THEREAT, ENGAGING THE THUS COOLED CYLINDER TO DRAW THE SAME THROUGH THE EXTRUDER AND PAST THE REGION WHERE THE CYLINDER IS COLLED, PERIODICALLY INCREASING THE RATIO OF THE SPEED AT WHICH THE MATERIAL IS FED TO THE EXTRUDER RELATIVE TO THE SPEED AT WHICH THE CYLINDER IS DRAWN FROM THE EXTRUDER TO UPSET THE TUBE WHERE IT IS DISCHARGED FROM THE EXTRUDER TO FORM PERIODIC INCREASES IN THICKNESS IN THE CYLINDER AND DIVIDING THE CYLINDER THUS FORMED WITH THE PERIODIC INCREASES IN THICKNESS TO PRODUCE TUBES WHICH HAVE INCREASED WALL THICKNESS AT LEAST AT ONE END THEREOF.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |