US3188690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of corrugated tubes
Assignee: Frankische Isolierrohr and Metallwaren Werke Gehrueder Kirchner
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Filing: 1964-08-26
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Granted: 1965-06-15
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Expires: 1984-08-26
Abstract
No abstract record available.
Inventors
- 👤 Zieg Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:32
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0015; B29C49/0021; B29L; B29L2023/00; B29L2023/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN AN APPARATUS FOR PRODUCING TUBES OF HARDENABLE PLASTIC MATERIAL, GUIDE MEANS DEFINING AN ELONGATED MOLDING ZONE; PAIRS OF COOPERATING SUBSTANTIALLY SEMITUBULAR MOLD SECTIONS ARRANGED TO MOVE THROUGH SAID MOLDING ZONE, EACH OF SAID SECTIONS HAVING SUBSTANTIALLY SEMICIRCULAR TRANSVERSE INTERNAL RIBS WHEREBY THE RIBS OF ONE SECTION OF EACH PAIR COOPERATE WITH THE RIBS OF THE OTHER SECTION OF THE SAME PAIR TO FORM ANNULAR RIBS WHILE THE SECTIONS ADVANCE IN SAID MOLDIONG ZONE; ADVANCING MEANS FOR MOVING SAID PAIRS OF SECTIONS AT IDENTICAL SPEEDS IN A DIRECTION FROM ONE END TOWARD THE OTHER END OF SAID MOLDING ZONE; AN EXTRUDING MACHINE HAVING A NOZZLE COMPRISING A TUBULAR MANTLE ADJACENT TO SAID ONE END OF THE MOLDING ZONE AND A CORE INCLUDING A FIRST PORTION SURROUNDED BY AND DEFINING WITH SAID MANTLE AN ANNULAR
Claim 2
Dependent Claim
134 words
IN AN APPARATUS FOR PRODUCING TUBES OF HARDENABLE PLASTIC MATERIAL, GUIDE MEANS DEFINING AN ELONGATED MOLDING ZONE; PAIRS OF COOPERATING SUBSTANTIALLY SEMITUBULAR MOLD SECTIONS ARRANGED TO MOVE THROUGH SAID MOLDING ZONE, EACH OF SAID SECTIONS HAVING SUBSTANTIALLY SEMICIRCULAR TRANSVERSE INTERNAL RIBS WHEREBY THE RIBS OF ONE SECTION OF EACH PAIR COOPERATE WITH THE RIBS OF THE OTHER SECTION OF THE SAME PAIR TO FORM ANNULAR RIBS WHILE THE SECTIONS ADVANCE IN SAID MOLDIONG ZONE; ADVANCING MEANS FOR MOVING SAID PAIRS OF SECTIONS AT IDENTICAL SPEEDS IN A DIRECTION FROM ONE END TOWARD THE OTHER END OF SAID MOLDING ZONE; AN EXTRUDING MACHINE HAVING A NOZZLE COMPRISING A TUBULAR MANTLE ADJACENT TO SAID ONE END OF THE MOLDING ZONE AND A CORE INCLUDING A FIRST PORTION SURROUNDED BY AND DEFINING WITH SAID MANTLE AN ANNULAR
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |