Patent ID: 8287798

Claim:
A method for blow-molding a packaging container by means of a gas in a mold starting from a preform and for recovering the blow-molding gas according to the following steps: pre-mold blowing of the gas under a first pressure (P 1 ) in a closed mold; blow-mold blowing of the gas under a second pressure (P 2 ) higher than the first pressure (P 1 ); recovery of the gas in a recovery volume until a pre-determined pressure is reached in the container; characterized by the following steps: blow-mold blowing of the gas under a third pressure (P 3 ) higher than the second pressure (P 2 ) before the step for recovering the gas in a recovery volume until a pre-determined pressure is reached in the container or for a pre-determined time and use of the recovered gas at or below the predetermined recovery volume pressure for carrying out the pre-molding and the first blow-molding step operations; release into the open air of the residual gas in the container during and after the recovery phase.