Method of blow molding aseptic bottles

The method of blow molding a hollow sealed bottle from a prison formed of a plastic material, the material having a set temperature, including the steps of:

• a. locating a parison having a temperature above the set temperature between a pair of open mold halves;
• b. closing the mold halves to capture the parison in a mold cavity having the shape of a bottle;
• c. increasing the pressure exerted by gas in the interior of the captured parison to above atmospheric pressure to expand the parison against the mold cavity and form an expanded body conforming in shape to the shape of the mold cavity and the expanded body having a hollow interior;
• d. holding the expanded body against the mold cavity while cooling the exterior of the expanded body to form a skin on the body which is at a temperature below the set temperature;
• e. reducing the pressure exerted by gas in the interior of the body to a subatmospheric pressure;
• f. then sealing closed the body with the gas confined in the interior of the body at the subatmospheric pressure;
• g. opening the mold halves and ejecting the molded and sealed body;
• h. maintaining a first portion of the body at a temperature above the set temperature during steps d, e, f, and g;
• and
• i. lastly, cooling the body to ambient temperature thereby releasing residual heat which warms the gas sealed in the body thereby increasing the pressure exerted by the gas in the interior of the sealed body to approximately atmospheric pressure without ballooning to form a stable sealed bottle conforming to the shape of the mold cavity.