System for manufacturing an irrigation pipe and a device and method for detecting holes in the wall of an irrigation pipe
US9022764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2012 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | May 24, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17D5/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for manufacturing an irrigation pipe comprises an extrusion unit, a calibrator unit, a cooling unit for cooling the irrigation pipe in a cooling liquid, and a traction unit for drawing the irrigation pipe in the cooling unit. The cooling unit comprises a device for detecting holes in the wall of the irrigation pipe and arranged for being immersed in the cooling liquid. The device for detecting holes comprises at least one optical transmitter and at least one optical receiver which define an optical barrier. The device is arranged so that the holes in the irrigation pipe located below the device produce gas bubbles which modify the optical barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.