Apparatus for forming curls in reinforcing material-attached profile strip, method for producing spiral pipe, and apparatus for producing spiral pipe
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United States of America Patent
Stats
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May 28, 2013
Grant Date -
Jul 22, 2010
app pub date -
Jul 11, 2008
filing date -
Jul 12, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In an embodiment, a long reinforcing material-attached profile strip (100) in which joint portions are formed at both side edge portions and to which a reinforcing material continuously formed in the longitudinal direction is attached is supplied, and mutually adjacent joint portions are joined to each other, thereby producing a spiral pipe (S). A curl-forming apparatus (3) includes a sending roller for the reinforcing material-attached profile strip (100) and a curl guide. Using the curl-forming apparatus (3), adjacent parts of the reinforcing material-attached profile strip (100) are subjected to plastic deformation to form spirals by being provided with arc-like curls having a radius of curvature substantially similar to or not greater than the radius of curvature of the spiral pipe (S). Accordingly, the spiral pipe (S) can be produced while suppressing the action of a restoring force that restores the reinforcing material-attached profile strip (100) to its original radius of curvature.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | B2 | JP5291399 | Jul 11, 2008 |
| JP | B2 | JP5155756 | Jul 11, 2008 |
| AU | B2 | AU2008273303 | Jul 11, 2008 |
| WO | A1 | WO2009008505 | Jul 11, 2008 |
| EP | A1 | EP2172327 | Jul 11, 2008 |
| US | B2 | US9248485 | Apr 26, 2013 |
International Classification(s)
- 2008 Application Filing Year
- B21C Class
- 126 Applications Filed
- 59 Patents Issued To-Date
- 46.83 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B21C Class
- 26.03 % this patent is cited more than
- 12 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 28, 2024 |
