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Method and apparatus for blow molding

Image Number 5 for United States Patent #7132076.

An apparatus and method for blow molding an article having a concave base wherein a mold has a base component comprising a molding surface for forming at least a portion of the concave base and a path for conduction of heat transfer fluid through channels within the base component. Improved heat transfer is effected in the base component by locating the channels at a plurality of distinct depths therein.

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