| 摘要 |
The invention relates to a plastic sleeve-joint tube comprising a tube element (1) of generally cylindrical shape, of specified, possibly standard, length, of constant diameter and having a ribbed outer structure with, in its outer surface (4), a succession of raised circular corrugations (5) which are separated by hollow grooves (6), one (7) of the ends of the element comprising, attached to this end and made as one part with the element, a hollow endpiece (8) which is open at its opposite portion and whose internal diameter (9) is slightly greater than the external diameter of the tube element (1), such that it can receive, by sliding or by shrink-fitting the endpiece-free end of another similar tube element (1'), thereby producing their mutual sealed sleeve-jointing. According to the invention, this tube is characterised in that the endpiece (8) is made by an additional injection-moulding operation after extrusion over the end (7) of the tube element, after forming the latter, on leaving an injection press, this hollow endpiece (8) comprising, in its internal surface (9), two projecting circular ribs or joggles (10, 11) which are spaced apart by a specified distance. <IMAGE> |
