Patent ID: 8337745

Claim:
An injection molding process, comprising steps of: injecting molten plastic through a gate to form an article; advancing the molten plastic to a remote region of the article that is intended to be hollow; filling the remote region with molten plastic; forming a further portion of the article integral with the remote region, between the remote region and the gate, the further portion not intended to be hollow; establishing an enlarged channel of molten plastic extending along the not intended to be hollow further portion of the article, the enlarged channel extending continuously from the gate to the remote region and spanning the not intended to be hollow further portion; maintaining a molten condition of the plastic in the center of the remote region and in a continuous core of the channel from the remote region to the gate; injecting a gas into the remote region and displacing the molten plastic in the center of the remote region back toward the gate through the channel; and solidifying the plastic remaining after said step of injecting a gas.