Patent ID: 8361377

Claim:
Blowing equipment, using a pressurized fluid, of vessels using preforms made of thermoplastic material, and comprising a body and a neck, said equipment comprising a blowing mold with a molding cavity wherein is able to be placed said body of a preform, said mold having an upper surface from which is able to protrude the neck of said preform once the body of the latter is placed in said molding cavity, said equipment further comprising a nozzle with an end shaped in order to be placed in functional sealed relation with said neck of the protruding preform, said end of nozzle being attached to the means of degassing of the blowing fluid capable of bearing tightly on said upper surface of the mold by forming an inner volume wherein the blowing fluid blown under pressure in the preform is able to be discharged after the blowing operation of the preform, wherein it comprises means of degassing which consist in an arrangement making it possible to carry out an expansion of the blowing fluid around the blowing cavity, arrangement consisting in a plurality of channels arranged around said blowing cavity, channels being provided with a side opening in said inner volume of said means of degassing, and on the other side in an annular channel which allows for the discharging towards the atmosphere.