High stretch ratio preforms and related containers and methods
AssigneeDr Pepper/Seven Up, Inc.
InventorsBrandon W. Knight, Patrick T. George, David A. Brunson
Life of this patent
Estimating the term…
Abstract
A generally hollow preform for making a stretch blow-molded container may include a threaded finish portion; a neck portion depending from the finish portion; a transition portion depending from the neck portion; a main portion depending from the transition portion; and a closed, generally rounded tip portion depending from the main portion. The preform may include stretch ratios with respect to the container including an axial stretch ratio of about 3.0 to 3.5, a hoop stretch ratio of about 5.0 to 5.5, and a total stretch ratio of about 15 to 19.25. In some embodiments, high stretch ratios may be achieved with less material, yielding substantial cost savings.
Claims20
A generally hollow PET preform for making a stretch blow-molded container, comprising:
- a threaded finish portion;
- a neck portion depending from said finish portion and including substantially cylindrical walls;
- a transition portion depending from said neck portion and including a first substantially conical wall section having a first taper of wall thickness;
- a main portion depending from said transition portion and including a second substantially conical wall section having a second taper of wall thickness, the second taper of wall thickness being lesser than said first taper of wall thickness;
- and
- a closed, generally rounded tip portion depending from said main portion, said tip portion having a third taper of wall thickness;
- wherein said preform comprises stretch ratios with respect to said container including an axial stretch ratio of about 3.0 to 3.5, a hoop stretch ratio of about 5.0 to 5.5, and a total stretch ratio of about 16 to 18.
A generally hollow PET preform for making a stretch blow-molded container, comprising:
- a threaded finish portion;
- a neck portion depending from said finish portion, said neck portion including substantially cylindrical walls;
- a transition portion depending from said neck portion, said transition portion including a first substantially conical wall section and having a percentage taper of about 54% to about 58%;
- a main portion depending from said transition portion, said main portion including a second substantially conical wall section and having a percentage taper of about 2% to about 5%;
- and
- a closed, generally rounded tip portion depending from said main portion, said tip portion having a percentage taper of about 38% to about 45%;
- wherein said preform comprises stretch ratios with respect to said container including an axial stretch ratio of about 3 to 3.5, a hoop stretch ratio of about 5 to 5.5, and a total stretch ratio of about 16 to 18.
Dependencies are inferred from the claim text.