Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Reexamination Certificate
2005-08-05
2010-06-15
Griffin, Steven P (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
C264S259000, C264S299000
Reexamination Certificate
active
07736566
ABSTRACT:
A process for manufacturing a compressed gas tank that includes a combination of an injection molding process and a rotomolding process. In a first step, a boss to be positioned in the opening of an outer structural layer of the tank is provided and a thin portion of the liner is injection molded to the boss so that a channel within the boss is filled with the liner material to increase the seal integrity between the boss and the liner. Once the liner material is hardened, the surface of the injection molding liner portion is cleaned. Next, a rotomolding process is performed to mold the remaining portion of the liner to the boss. During the rotomolding process, the injection molded portion of the liner melts to be part of the liner made during the rotomolding process.
REFERENCES:
patent: 5746961 (1998-05-01), Stevenson et al.
patent: 6415941 (2002-07-01), Huse
patent: 2005/0194714 (2005-09-01), Nish et al.
Hermann Ingo
Lindner Markus
Pechtold Rainer
GM Global Technology Operations Inc.
Griffin Steven P
Huda Saeed M
Miller John A.
Miller IP Group, PLC
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