| 摘要 |
Improved coupling joint for a couple of pipes characterised in that of realising by means of direct die-injection in plastic material on both said pipes ends: a spacing element (31) inserted on the pipes both ends (1, 2), and respective sleeves (33) which are inserted on said pipes ends (1, 2) and extend beyond said pipes end (1, 2), the extension inside diameter of said sleeves (331) being the diameter for the keying to the pipes to be jointed; at least a part of said sleeve being inserted on said pipe (332) up to coating a suitable protrusion (11) of said pipe.
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