Abstract: An injection-blow molding machine is provided with non-splitting injection and blow molds mounted in stationary relationship on a first platen with the axes of the molds parallel with each other and with a spindle situated equidistant from the molds. Parison pins which cooperate with the two molds are mounted on a second movable platen connected to the end of the spindle and are inserted and withdrawn from the molds as the spindle and the second platen are reciprocated toward and away from the molds. The second platen is also rotatable about the spindle axis to permit the parison pins to be indexed between the injection and blow molds so that parisons can be formed in the injection mold and transferred to the blow mold where a final article such as a container is formed.

Abstract: In an injection blow molding machine, parisons are stretched and twisted as they are moved between the parison mold and the blow mold by extending and rotating the parison pins. The stretching and twisting of the parison prior to the blowing operation permits larger containers with smaller finishes to be produced and also permits the finished article to be stronger by regulating the molecular arrangement in the plastic material forming the article.

Abstract: A plastic injection blow molding manifold has progressively smaller passageways defined at the mating surfaces between its two primary members. The circular cross sectional inlet area is reduced by one-half in a first cross passageway, and then further reduced in two additional cross passageways in an eight nozzle version. All of these cross passageways are defined at said mating surfaces, and the respective ends of such additional cross passageways communicate with paired outlets, each of which outlets has an associated nozzle and coaxially arranged heating element.