Patent ID: 7905113

Claim:
An I.S. machine having a blow station at which a parison is blown into a bottle in a blow mold comprising: a guide arm including a plurality of blow heads; a cooling tube arm assembly; a corresponding number of vertical cooling tubes operatively associated with said blow heads, said corresponding number of vertical cooling tubes being coupled to said cooling tube arm assembly; a first motor for displacing said cooling tube arm assembly independently of said guide arm between a first up position and a second down position; a second motor configured to displace said guide arm; a vertical post having a vertical slot and a lead screw within the post, the lead screw coupled to the motor and including a nut coupled to the guide arm; a source of pressurized air; a conduit coupled to the source of pressurized air and to said vertical cooling tubes; a pressure regulator coupled to the conduit for defining the pressure of the air delivered to said cooling tubes; a sensor coupled to the blow head and configured to obtain the pressure of the supplied air in the blow head; and a control for operating said second motor to displace said guide arm pursuant to a selected pressure profile as a function of the air pressure sensed in the blow head, wherein the guide arm is displaced to a location where the blow head is spaced from the blow mold in response to the air pressure defined by the pressure profile to maintain an internal bottle pressure at the specified pressure profile over time.