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US3243850A
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Apparatus for the production of corrugated tubes
Assignee: Frankische Isolierrohr and Metallwaren Werke Gehrueder Kirchner
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Filing: 1963-03-05
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Granted: 1966-04-05
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Expires: 1983-03-05
Abstract
No abstract record available.
Inventors
- 👤 Zieg Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:50
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/30; B29C43/00; B29C43/22; B29C43/224; B29C48/00; B29C48/03; B29C48/09; B29C48/13; B29C48/25; B29C48/30; B29C48/303; B29C49/00; B29C49/0015; B29C49/0021; B29D; B29D5/00; B29D5/10; B29C33/00; B29C33/02; B29C35/00; B29C35/16; B29L; B29L2023/00; B29L2023/18; Y; Y10; Y10S; Y10S264/00; Y10S264/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN AN APPRATUS FOR CONTINUOUSLY MOLDING OF CORRUGATED TUBES FROM HARDENABLE PLASTIC MATERIAL, INCOMBINATION, TWO SERIES OF HALF MATRICES ARRANGED END-TO-END IN EACH SERIES, EACH HALF MATRIX HAVING A MOLD CAVITY WITH CORRUGATED WALLS AND A CONTACT SURFACE SURROUNDING SAID CAVITY; MEANS SUPPORTING THE TWO SERIES OF HALF MATRICES MOVABLE ALONG TWO ENDLESS PATHS HAVING AT LEAST ONE SUBSTANTIALLY STRAIGHT ZONE IN WHICH THE HALF MATRICES IN SAID TOW SERIES ARE RESPECTIVELY ARRANGED IN PAIRS OPPOSITE TO EACH OTHER AND FOR PRESSING IN SAID STRAIGHT ZONE THE CONTACT SURFACES OF EACH PAIR OF AHLF MATRICES AGAINST EACH OTHER SO THAT THE CAVITIES IN EACH PAIR OF HALF MATRICES FORM A SINGLE CAVITY HAVING CORRUGATED WALLS AND THE CAVITIES OF THE HALF MATRICS IN SAID STRAIGHT ZONE FORM AN ELONGATED CONTINUOUS MOLD CAVITY DEFINING A CORRUGATING ZONE; EXTRUSION MEANS EXTENDING INTO ONE END OF SAID ELONGATED CONTINUOUS MOLD CAVITY FOR CONTINUOUSLY EXTRUDING PLASTIC MATERIAL IN TUBULAR FORM DIRECTLY INTO SAID ELONGATED CONTINUOUS MOLD CAVITY; DRIVE MEANS COOPERAT-
Claim 2
Dependent Claim
166 words
IN AN APPRATUS FOR CONTINUOUSLY MOLDING OF CORRUGATED TUBES FROM HARDENABLE PLASTIC MATERIAL, INCOMBINATION, TWO SERIES OF HALF MATRICES ARRANGED END-TO-END IN EACH SERIES, EACH HALF MATRIX HAVING A MOLD CAVITY WITH CORRUGATED WALLS AND A CONTACT SURFACE SURROUNDING SAID CAVITY; MEANS SUPPORTING THE TWO SERIES OF HALF MATRICES MOVABLE ALONG TWO ENDLESS PATHS HAVING AT LEAST ONE SUBSTANTIALLY STRAIGHT ZONE IN WHICH THE HALF MATRICES IN SAID TOW SERIES ARE RESPECTIVELY ARRANGED IN PAIRS OPPOSITE TO EACH OTHER AND FOR PRESSING IN SAID STRAIGHT ZONE THE CONTACT SURFACES OF EACH PAIR OF AHLF MATRICES AGAINST EACH OTHER SO THAT THE CAVITIES IN EACH PAIR OF HALF MATRICES FORM A SINGLE CAVITY HAVING CORRUGATED WALLS AND THE CAVITIES OF THE HALF MATRICS IN SAID STRAIGHT ZONE FORM AN ELONGATED CONTINUOUS MOLD CAVITY DEFINING A CORRUGATING ZONE; EXTRUSION MEANS EXTENDING INTO ONE END OF SAID ELONGATED CONTINUOUS MOLD CAVITY FOR CONTINUOUSLY EXTRUDING PLASTIC MATERIAL IN TUBULAR FORM DIRECTLY INTO SAID ELONGATED CONTINUOUS MOLD CAVITY; DRIVE MEANS COOPERAT-
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |