Hoover Universal, Inc.

Hoover University, Inc.

Thomas R Buehler

Michael Hirschberger

Thomas A Shapler

Dennis J Tate

Ronald Pieper

A multi-station injection blow molding apparatus for producing hollow plastic articles, including vertically stacked preform injection molds at a first station, vertically stacked blow molds at a second station and an indexing head assembly having upper and lower core bearing indexing heads which are rotatable in a horizontal plane when the molds are open and also are movable vertically relative to and in correspondence with movement of the molds during opening and closing of the molds. In one embodiment, the movable supports which support the mating mold portions of the upper and lower injection and blow molds are coupled to the mold clamping mechanism of the apparatus through mechanical linkage which causes the upper and lower molds to be opened and closed simultaneously. In another embodiment, the movable supports are coupled together, causing the upper and lower molds to be opened and closed sequentially.

Injection blow molding apparatus including stacked molds

Apparatus for blow molding plastic containers with a longitudinal view stripe of a transparent resin in the side wall for visually monitoring the level of the contents of the container. The apparatus includes a plurality of die heads each of which includes a mandrel sleeve having a diverter for directing the flow of a pigmented resin around the mandrel sleeve to form a tubular parison, and for inserting a longitudinal stripe of a clear resin into the pigmented resin. The container mold halves are positioned relative to the parison such that the view stripe is located on the parting line of the mold halves such that the length of the view stripe along the top and bottom walls of the container is controlled.

Growing community of inventors

Adrian, MI, United States of America

Thomas R Buehler