Finish and closure for plastic pasteurizable container
AssigneeGraham Packaging Company, L.P.
InventorsDavid P. Piccioli, Amit S. Agrawal, Wayne N. Collette
Life of this patent
Estimating the term…
Abstract
Plastic containers subjected to pasteurization processes with a closure having an annular finish support ring that supports an inner surface of the neck finish of the container from inward deformation during pasteurization. The finish support ring can be integral with the closure or can extend from a closure liner. Also disclosed are closures for products that require pasteurization, as well as modified finish threads to provide a surface contact between the finish and closure threads.
Claims44
A plastic closure for supporting an amorphous neck finish of a pasteurizable plastic container against deformation, comprising:
- a top wall;
- a depending annular skirt extending from the top wall;
- and
- a rigid finish support ring extending from the top wall, the finish support ring having an outer diameter sized to support an inner diameter of the amorphous container neck finish against inward deformation during pasteurization.
A plastic closure for supporting an amorphous neck finish of a pasteurizable plastic container against deformation, comprising:
- a shell comprising a top wall and a depending annular skirt extending from the top wall;
- a liner covering at least a portion of the underside of the top wall;
- and
- a rigid finish support ring extending from the liner, the finish support ring having an outer diameter sized to support an inner diameter of the amorphous container neck finish against inward deformation during pasteurization.
A pasteurizable package comprising:
- a pasteurizable plastic container having an amorphous neck finish;
- and
- a plastic closure comprising a depending annular skirt extending from a top wall and a rigid finish support ring extending from the top wall, the finish support ring having an outer diameter sized to support an inner diameter of the amorphous container neck finish against inward deformation during pasteurization.
A pasteurizable package comprising:
- a plastic pasteurizable container comprising an amorphous neck finish having a vented thread;
- and
- a plastic closure comprising a top wall and a depending annular skirt, an inner wall of the skirt having a nonvented thread that engages the vented thread of the neck finish,
- wherein a surface of the nonvented closure thread contacts a surface of the vented container thread to provide surface contact between the closure thread and the container thread and to support the container thread against deformation during pasteurization.
A pasteurizable package comprising:
- a plastic pasteurizable container comprising an amorphous neck finish having a thread;
- and
- a plastic closure comprising a top wall and a depending annular skirt, an inner wall of the skirt having a thread that engages the thread of the neck finish,
- wherein the container thread contacts the closure thread at a distance of at least 50% of the radial depth of the thread, as measured from the tip of the thread to a wall of the neck finish, to support the container thread against deformation during pasteurization.
Dependencies are inferred from the claim text.