Method and apparatus for producing pipes for drip irrigation
US5271786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1097
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A technique for manufacturing extruded drip irrigation lines including drip irrigation elements having a non-circular cross section including the steps of: PA1 extruding a drip irrigation conduit; and PA1 heat welding discrete drip irrigation elements having a non-circular cross section to a portion of the interior surface of the drip irrigation conduit extending over less than the entire circumference thereof, the step of heat welding including the following steps: PA1 sequentially feeding discrete drip irrigation elements through the interior of the drip irrigation conduit; PA1 causing individual drip irrigation elements to establish initial contact with the extruded conduit as the extruded conduit is being stretched to its final cross sectional dimensions; and PA1 completing heat welding of the elements to the conduit when the conduit has substantially reached its final cross sectional dimensions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.