US3239400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a reinforced externally corrugated tube
Assignee: Techno Chemie Kessler and Co GmbH
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Filing: 1960-11-25
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Granted: 1966-03-08
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Expires: 1980-11-25
Abstract
No abstract record available.
Inventors
- 👤 Anselm Anthony Cesar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:25
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/581; B29C53/582; B29C65/00; B29C65/02; B29C65/10; B29L; B29L2023/00; B29L2023/005; B29L2023/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A METHOD OF CONTINUOUSLY MAKING A TUBE WHICH IS EXTERNALLY CORRUGATED AND HAS A SUBSTANTIALLY SMOOTH BORE, WHICH CONSISTS IN WINDING A REINFORCING HELIX WITH ADJACENT TURNS SPACED APART AROUND A CONTINUOUSLY ROTATING MANDREL, SAID REINFORCING HELIX HAVING A SURFACE OF THERMOPLASTIC MATERIAL, HELICALLY WINDING A FLAT TAPE OF A MATERIAL, HAVING AT LEAST ONE FACE THEREOF CONSTITUTED BY A THERMOPLASTIC MATERIAL, HELICALLY WINDING A FLAT TAPE OF A MATERIAL, HAVING AT LEAST ONE FACE THEREOF CONSTITUED BY A THERMOPLASTIC MATERIAL, AROUND SAID REINFORCING HELIX AND IN SUCH MANNER THAT THE EDGES OF ADJACENT TURNS OF TAPE OVERLAP, HEATING THE THERMOPLASTIC MATERIAL OF THE TAPE AND THE HELIX TO SOFTEN THE THERMOPLASTIC MATERIAL TO THE TEMPERATURE REQUIRED FOR WELDING, AND DEFORMING THE FLAT TAPE WHILE SOFTENED, BY MEANS OF FORCES ACTING RADIALLY, AROUND THE REINFORCING HELIX TO WELD THE TAPE TO THE REINFORCING HELIX AND TO WELD THE OVERLAPPING EDGES OF THE TAPE TOGETHER AND THEREBY TO FORM A CORRUGATED TUBE WITH THE PORTIONS OF THE TAPE INTERMEDIATE THE TURNS OF THE REINFORCING HELIX LYING SUBSTANTIALLY ON THE SAME DIAMETER AS THE INTERNAL DIAMETER OF THE REINFORCING HELIX.
Claim 2
Independent Claim
188 words
A METHOD OF CONTINUOUSLY MAKING A TUBE WHICH IS EXTERNALLY CORRUGATED AND HAS A SUBSTANTIALLY SMOOTH BORE, WHICH CONSISTS IN WINDING A REINFORCING HELIX WITH ADJACENT TURNS SPACED APART AROUND A CONTINUOUSLY ROTATING MANDREL, SAID REINFORCING HELIX HAVING A SURFACE OF THERMOPLASTIC MATERIAL, HELICALLY WINDING A FLAT TAPE OF A MATERIAL, HAVING AT LEAST ONE FACE THEREOF CONSTITUTED BY A THERMOPLASTIC MATERIAL, HELICALLY WINDING A FLAT TAPE OF A MATERIAL, HAVING AT LEAST ONE FACE THEREOF CONSTITUED BY A THERMOPLASTIC MATERIAL, AROUND SAID REINFORCING HELIX AND IN SUCH MANNER THAT THE EDGES OF ADJACENT TURNS OF TAPE OVERLAP, HEATING THE THERMOPLASTIC MATERIAL OF THE TAPE AND THE HELIX TO SOFTEN THE THERMOPLASTIC MATERIAL TO THE TEMPERATURE REQUIRED FOR WELDING, AND DEFORMING THE FLAT TAPE WHILE SOFTENED, BY MEANS OF FORCES ACTING RADIALLY, AROUND THE REINFORCING HELIX TO WELD THE TAPE TO THE REINFORCING HELIX AND TO WELD THE OVERLAPPING EDGES OF THE TAPE TOGETHER AND THEREBY TO FORM A CORRUGATED TUBE WITH THE PORTIONS OF THE TAPE INTERMEDIATE THE TURNS OF THE REINFORCING HELIX LYING SUBSTANTIALLY ON THE SAME DIAMETER AS THE INTERNAL DIAMETER OF THE REINFORCING HELIX.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |