Abstract: The invention relates to a method of gas blow forming packaging in a mould using a preform and comprising recovery of the blow gas. The inventive method comprises the following steps consisting in: —) pre-blowing the gas into the preform at a first pressure (P1); —) blowing the gas into the pre-blown packaging at a second pressure (P2) which is greater than the first pressure (P1); —) blowing the gas into the partially-blown packaging at a third pressure (P3) which is greater than the second pressure (P2); —) recovering the gas in a recovery volume until a pre-determined pressure is obtained in the packaging or for a pre-determined period of time; —) using the recovered gas in order to preform pre-blowing operations and the first blowing step; and expanding the air that is free of residual gas in the packaging during and after the recovery phase. The invention also relates to a device that is used to implement said method.

Abstract: The invention concerns a device for blowing containers, in particular bottles, from a preform with a gas and recuperating said gas, comprising at least means for supplying the device with gas at a first pressure and at a second pressure, drawings means and container forming means. It comprises means for recuperating said gas until a predetermined expansion pressure is reached in the container, means for controlling said recuperating means and adjusting means for adjusting the operating conditions of said control means.