Patent ID: 6423253
Filing Date: 2002-07-23
Classification: B29C,Y02P,Y10S

Abstract:
Manufacturing procedure for containers (200, 300, 800) by blow molding using gas under pressure, in particular air, of blanks (22, 400) of thermoplastic material on the inside of molds (2, 3, 17, . . . 20) in a system containing at least two finishing molds in which the blanks are successively introduced and the containers are successively blow molded, the blow molding of each container comprising, after a step (5) of blow molding using a gas at a first pressure (P1), a step (6) of at least partial degassing, followed by a step (7) in the process of which gas at a second pressure (P2), lower than the first (P1), is introduced into the container, characterized in that the gas at the second pressure (P2) introduced into a container is made up at least in part of the product of degassing of at least one container that has been blow molded further on in the system.