Hollow glass objects
AssigneeSaint-Gobain Emballage
InventorsRene M. Barbier, Michel M. Resse
Life of this patent
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Abstract
A forming process which utilize blown-blown technique has an initial phase, a transfer phase, and a finishing phase for producing a hollow glass object provided with a neck. During the initial phase all or part of the internal profile of the neck is molded by a mechanical element.
Claims12
A hollow glass object having a neck with exactly two internal profiles and formed by the steps of:
- mechanically shaping the internal profile of the neck by puncturing the neck using a movable die and a movable punch to produce a first mechanically shaped internal profile terminating in a cylindrical constriction with a substantially vertical sidewall;
- initially blow molding the object in a mold by using a compressed gas to produce a second pneumatically shaped, curved internal profile reaching the constriction, while maintaining the mechanically shaped form of the first internal profile of the neck;
- transferring the initially blow molded object to a finishing mold;
- and
- performing a finishing blow molding operation in the finishing mold.
A hollow glass object having a neck with a localized cylindrical constriction at a junction of two internal profiles for control of flow of a liquid therein, wherein a ratio of the inside diameter of the neck at the constriction to the inside diameter of the neck at a lip thereof is about 0.5, and wherein said restriction is at a seam at a terminal end of the threading.
Dependencies are inferred from the claim text.