Method of manufacture of a plastic container with stretched external thread
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United States of America Patent
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Oct 20, 2009
Grant Date -
Jul 14, 2005
app pub date -
Mar 1, 2005
filing date -
Jan 24, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A method of making a plastic container having a body and a finish with at least one external thread includes injection or compression molding a plastic preform having a body and a finish with at least one external thread, blow molding the body of the preform to form the body of the container, and either prior to, subsequent to or both prior and subsequent to blow molding the container body, expanding the injection or compression molded preform finish to form a container finish having at least one injection or compression molded external thread. In the preferred embodiments of the invention, the finish is expanded after the container body is blow-molded. The invention can be implemented to expand a narrow-neck preform or container finish to a wide-mouth preform or container finish.
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