US2854691A - Plastic extrusion machine - Google
US2854691A US577109A US57710956A US2854691A US 2854691 A US2854691 A US 2854691A US 577109 A US577109 A US 577109A US 57710956 A US57710956 A US 57710956A US 2854691 A US2854691 A US 2854691A Authority US United States Prior art keywords nozzle extrusion photo valve air Prior art date 1955-04-12 Legal status (The legal status is an assumption and is not a legal …
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