| 摘要 |
PCT No. PCT/DE91/00228 Sec. 371 Date Jan. 10, 1992 Sec. 102(e) Date Jan. 10, 1992 PCT Filed Mar. 15, 1991 PCT Pub. No. WO91/14549 PCT Pub. Date Oct. 3, 1991.A process for the continuous production of an irrigating tube having trickling elements embedded between an inner tube and an outer tube; provides that, after extrusion of an inner tube and subsequent cooling of the tube, the latter is perforated at regular intervals to produce inlet orifices, that the tube is subsequently heated up again, at least in the region of the perforations, and that thereafter a trickling element is pressed into the surface of the inner tube in each case at the heated-up perforation points and is thereby connected to the inner tube. The inner tube and trickling elements are subsequently surrounded by an outer tube, in which outer outlet orifices are made at the points of the trickling elements. |
