Patent ID: 7399177

Claim:
A machine for producing containers made of a thermoplastic by stretching and blow molding preforms, this machine comprising a continuously rotating turntable supporting at least one molding device comprising an openable mold and a stretch rod which can be sequentially moved, by support and driving means, along the axis of the mold so as to stretch the preform during the container production operation, wherein said means for supporting and driving the stretch rod are mechanical means which comprise: power takeoff means functionally associated with said turntable and able to generate, from the continuous unidirectional rotation of the turntable, two rotary movements of given angular amplitudes of a rocker occurring at two respective predetermined angular locations of the circular route of the turntable, and movement conversion means able to convert said two rotary movements of given angular amplitudes of the rocker into two alternately descending and ascending opposite linear movements of a drive member along a route substantially parallel to the axis of the mold, said drive member being connected to the stretch rod.