Graham Engineering Corporation

Rolf E Weingardt

John Madden Mathy, Jr

David N Fiorani

John M Brown, Jr

A method of cutting or trimming a plastic log ejected from a blow mold to form multiple open-mouthed bottles, the log having respective bottle portions on opposite ends of the log with each bottle portion having an offset neck and the bottle portions connected in neck-to-neck relationship by a neck ring having a central neck axis, that is especially suitable for high-output production lines. A log conveyor is continuously moved along a path. The body to be trimmed is placed between holders carried by the conveyor and trimmed by rotating the holders about the offset neck axis as the conveyor moves past a trim knife extending along the path.

Bottle trimmer and method

A method of cutting or trimming a plastic body ejected from a blow mold that is especially suitable for high-output production lines. A log conveyor is continuously moved along a path. The body to be trimmed is placed between holders carried by the conveyor and trimmed by rotating the holders as the conveyor moves past a trim knife extending along the path.

A method of removing flash extending in a plane from a plastic bottle forming a portion of a plastic one-bottle or multi-bottle blow molded log includes continuously moving a log holder and a punch assembly along a path. The untrimmed log is placed on the log holder. The punch assembly carries a punch that moves in a direction perpendicular to the flash to impact and remove the flash.

Apparatus for trimming plastic from blow molded one-bottle or two-bottle logs during movement of the logs on log holders moving along a conveyor path extending from an inlet end to an outlet end. The apparatus includes a frame and, connected to the frame, a log conveyor, a punch assembly, and a trim assembly. The punch assembly is located at a first portion of the conveyor path and the trim assembly is located at a different, second portion of the conveyor path. The apparatus trims neck flash and neck rings from logs moving along the path.

A rotary blow molding machine includes a horizontal main shaft with a plurality of molds spaced around the shaft and mounted on the shaft by linear bearings for movement along the shaft. A shaft drive rotates the shaft and molds around the axis of the shaft in the steps and dwells the shaft and molds between steps. Open molds are rotated from a lower container eject position up to a parison capture position and then close on a parison. The closed molds are shifted axially along the main shaft and the parison is blown. Further rotation of the shaft returns the molds to the mold eject position where the molds open and molded containers are ejected downwardly with gravity assist.

Growing community of inventors

York, PA, United States of America

Rolf E Weingardt