System for thermoforming articles such as picnic plates in a pair of simultaneously fed, continuous thermoplastic webs which subsequently move into nested relation, and then dually trimming the nested articles from the webs

Abstract From the Canadian patent

A system for producing generally concavo-convex synthetic plastic containers and like articles such as, picnic plates wherein a mold station has a stationary intermediate mold with projecting male mold parts on one side and directly opposite recessed female mold cavities in alignment therewith on the other side. A first movable mold, on the side of the intermediate mold having the male mold parts is provided with recessed mating female mold cavities of the same dimensions as the said cavities in the intermediate mold and a second movable mold on the other side of the intermediate mold has aligned projecting male mold parts mating with the cavities in the intermediate mold. A pair of heated, …