Extrusion Blow Molding (EBM) is the oldest of the various blow molding processes. It really came into being in the 1930s when a Mr. Ferngren developed plastic bottles made from cellulose acetate in an automatic process. 

This technology was later used by the PLAX Corporation in the US, a company that developed EBM as well as other plastics technologies. Glass bottle manufacturers saw the potential in plastics starting in the 1950s. Owens-Illinois had purchased part of Plax and used it to develop their own style of machines and Wheaton started the production of injection blow machines.