POLYGONAL SHAPED CONTAINER BODY FORMING APPARATUS

摘要

A container body forming apparatus for reshaping a tubular container body of generally circular cross-section into a polygonal cross-section. The apparatus comprises a shaping horn having inlet and discharge ends and a plurality of sides defining the polygonal shape. Moving surface means are provided on each side of the horn for engagement with the interior of the container body. Means provide continuous moving faces in substantially radial alignment with respective surface means for engaging the exterior of the container body and clasp the same with the surface means. The surface means pregressively recedes into the body toward the discharge end and recessed into respective sides. The faces converge from the inlet end toward the discharge end and are operative to deflect the container body inwardly of the sides of the horn and to continuously hold the same in the deflected condition and to concomitantly advance the body toward the discharge end. The continuous means comprise endless belts opposing each side of the horn, back up rollers behind each belt biasing a portion thereof toward the opposing moving surface means, and means for biasing associated rollers for each belt comprising a common floating bar mounting the associated rollers.