Daryl Kim Singleton

US Patent:

6551544, Apr 22, 2003

Filed:

Apr 17, 2001

Appl. No.:

09/836483

Inventors:

Daryl K. Singleton - Chelsea MI

Assignee:

Owens-Brockway Plastic Products Inc. - Toledo OH

International Classification:

B29C 4950

US Classification:

264536, 425525, 425527, 425537

Abstract:

Extrusion blow molding apparatus ( ) having a body mold ( ) for forming a body portion (B) of a blow molded container (C) from a blowable, extruded thermoplastic parison (P). The blow molding apparatus also has a neck mold ( ) for forming an annular finish portion ( ) of the container from the parison, the neck mold being removable from the body mold at the conclusion of the blowing step. A blow pin ( ), which is reciprocable relative to the body mold, introduces blowing air into the parison during the blowing cycle, and an outside diameter of the blow pin provides a surface against which an internal diameter of the finish is formed. The process also forms a moil portion (M) that extends upwardly and outwardly from a rim (R) at the top of the finish portion of the container, and an anvil ( ) with a moil retention element ( ) with an inwardly projecting flange ( ) is provided in contact with an exterior of the neck mold.