Method and apparatus for making dripper lines
US6461468B1 · kind B1 · utility
38Cited by
1References
27Claims
0Family size
Inventor
Key dates
| Filing date | Nov 29, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Nov 29, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7004
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for making a dripper line by feeding the dripper units (DU) into the extruded tube (ET) at a linear velocity, at the instant of their initial contact with the inner surface of the tube, which is greater than the linear velocity of the inner surface of the tube where initially contacted by the dripper units. The dripper units are fed between a track (10) within the extruded tube and a moving backing surface (20) externally of the tube spaced from the track to determine the final thickness of the extruded tube and the dripper unit welded thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.