Patent ID: 6461547
Filing Date: 2002-10-08
Classification: B29C

Abstract:
In a method of stretch blow molding a plastic parison mounted to a parison engagement assembly into a container wherein a blow mold rod seal assembly defining a blow air inlet port and an interior cavity disposed in fluid connection with the blow air inlet port is connected to a source of blow air, the improvement comprising:stretching the parison by sliding a stretching rod through the interior cavity and into the parison, the stretching rod including a cooling fluid tube defining a cooling fluid inlet port and a cooling fluid outlet port; connecting the cooling fluid inlet port to a source of a cooling fluid to introduce the cooling fluid within the container through the cooling fluid outlet port; and heating the blow mold rod seal assembly to maintain at least a portion of the stretching rod at a temperature above a preselected level to prevent accumulation on at least a portion of the stretching rod of water ice sublimated from water vapor present in the blow air.