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Blow molded plastic container and method
| Details |
Inventors: Valyi, Emery I.;
Assignee: PepsiCo., Inc. (Purchase, NY)
Primary Examiner: Shoap; Allan N.
Assistant Examiner: McDonald; Christopher J.
Attorney, Agent or Firm: Bachman & LaPointe
A plastic preform for forming blow molded containers including at least one internal wall member separately formed from the molded plastic article and extending completely across the hollow space therein, wherein the internal wall member has edge portions which engage the body portion and are joined thereto. Also discloses the blow molded plastic container and method for forming preform and container. |
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DETAILED DESCRIPTION In accordance with the present invention, the foregoing objects and advantages may be readily obtained.
The present invention includes a plastic preform for forming blow molded plastic containers.
The preform comprises: a molded plastic article having a neck portion defining an opening, a body portion depending therefrom, and an integral, closed bottom portion depending from the body portion; wherein the body portion defines a hollow space closed at the bottom portion and open at the neck portion; and at least one internal wall member separately formed from said entire article and inserted thereinto and extending completely across said hollow space, wherein said internal wall member has edge portions thereof which engage the body portion and are joined thereto as by welding, adhesive bonding, or by mechanical means.
The internal wall member may be joined to both the body and bottom portions to provide support and reinforcement for those portions of the container that are blow molded from these, or may be limited in extent so that it is welded only to the portion corresponding to locations in the container that require support and reinforcement.
The preform is preferably tube-like, with an externally threaded neck portion.
In a preferred embodiment, the internal wall member includes a solid portion extending completely across the hollow space and welded to the body portion, and a frame portion adjoining the solid portion extending to the bottom portion of the preform and welded to both the body and bottom portions, including a hollow internal space between the solid portion of the internal wall and the bottom portion of the preform.
The present invention also resides in the method of molding said preform and the blow molded container prepared from the aforesaid preform.
The container generally includes a shoulder portion between the neck and body portions, wherein solid portion of the internal member may terminate in the body portion spaced from the shoulder portion and/or the bottom portion
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Nonmetallic Processes 
