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US 5,325,976 AGranted
Container closure assembly
OwnerEmery I. Valyi, Charles J. Bruninventors
Life of this patent
Estimating the term…
Abstract
A container closure assembly including a plastic container, a barrier layer and a closure member. The barrier layer and closure member completely cover the access opening to the container and the barrier layer includes a weakened portion thereof which is broken open on removing the closure member.
Claims14
A container closure assembly which comprises:
- a plastic container having a container neck and a rim portion defining an access opening for the container;
- a barrier layer having a rim and a central portion completely covering the access opening and with the barrier layer rim portion adhered to said container rim portion, said barrier layer including a weakened portion in said barrier layer central portion;
- a removable closure member adapted to fit over said container neck, covering said container rim and barrier layer and engaging said container neck portion, said closure member intimately contacting said barrier layer when said closure member is removed by twisting;
- wherein the closure member and barrier layer include stepped portions adjacent one another over the axis opening, said barrier layer stepped portions including corner portions thereof;
- whereby twisting the closure member places the barrier layer stepped portions under torsion breaking the barrier layer at the weakened portion and opening the container.
2 more elements
A container closure assembly which comprises:
- a plastic container having a container neck and a rim portion defining an access opening for the container;
- a barrier layer having a rim and a central portion completely covering the access opening and with the barrier layer rim portion adhered to said container rim portion, said barrier layer including a weakened portion in said barrier layer central portion;
- a removable closure member adapted to fit over said container neck, covering said container rim and barrier layer and engaging said container neck portion, said closure member intimately contacting said barrier layer when said closure member is removed by twisting;
- wherein the closure member and barrier layer include stepped portions adjacent one another over the axis opening, said barrier layer stepped portions including corner portions thereof and defining a configuration selected from the group consisting of a hexagonal configuration and a square configuration;
- whereby removal of the closure member by twisting breaks the barrier layer at the weakened portion and opens the container.
2 more elements
A container closure assembly which comprises:
- a plastic container having a container neck and a rim portion defining an access opening for the container;
- a barrier layer having a rim and a central portion completely covering the access opening and with the barrier layer rim portion adhered to said container rim portion, said barrier layer including a weakened portion in said barrier layer central portion;
- a removable closure member adapted to fit over said container neck, covering said container rim and barrier layer and engaging said container neck portion, said closure member intimately contacting said barrier layer when said closure member is removed by twisting;
- wherein the barrier layer is injection molded plastic comprising a first injection molded portion and a second injection molded portion, and including a brittle interface between the two injection molded portions defining the weakened portion;
- whereby removal of the closure member by twisting breaks the barrier layer at the weakened portion and opens the container.
2 more elements
Dependencies are inferred from the claim text.