Product container with integral selective membrane
View Patent ↗In embodiment, the present invention relates to a cap and container assembly comprising at least one selective gas permeable membrane, wherein the assembly is manufactured so that the membrane is an integral part of the assembly and wherein the membrane is composed of a material for controlling conditions of gas concentration in an internal portion of the assembly when the cap is closed. In another embodiment, the present invention relates to a method of forming a cap and container assembly comprising at least one selective gas permeable membrane that is integral with the assembly comprising: cutting the membrane to a pre-selected form, wherein the membrane is composed of a material for controlling conditions of gas concentration in an internal portion of the assembly when the cap is closed; placing the membrane into a mold by robotic means; and overmolding the assembly about the membrane to form an assembly wherein the membrane is an integral part of the assembly.
1. An integral cap and container assembly comprising:
a container having sidewalls, a closed bottom end and opening at an upper end;
a cap having a base with an inside surface and an outside surface;
a hinge attached to the container and the to the cap at a first end of the cap and a first end of the container to form the integral cap and container assembly;
a first selectively permeable membrane that is formed as an integral part of the cap for controlling conditions of gas concentration in an internal portion of the assembly when the cap is closed;
a second selectively permeable membrane that is formed as an integral part of the cap for controlling of gas concentration in an internal portion of the assembly when the cap is closed; and
a moisture tight resealable configuration formed between the cap and the sidewalls of the container;
wherein the first and second selectively permeable membranes are selectively permeable to different gases, the first selectively permeable membrane allows permeation of a first gas and not a second gas, and the second selectively permeable membrane allows permeation of the second gas and not the first gas.
2. The integral cap and container assembly of claim 1 , wherein the first gas is oxygen and the second gas is carbon dioxide.
3. The integral cap and container assembly of claim 1 , wherein the cap base defines an area, and the first and second selectively permeable membranes are located at different regions of the area.
4. The integral cap and container assembly of claim 1 , wherein the cap base defines first and second openings, the first selectively permeable membrane extends across the first opening, and the second selectively permeable membrane extends across the second opening.
5. The integral cap and container assembly of claim 1 , wherein the first and second selectively permeable membranes are each positioned to form a portion of the inside surface of the cap base.
6. The integral cap and container assembly of claim 1 , wherein the first and second selectively permeable membranes are each positioned between the inner surface and the outer surface of the cap base.
7. The integral cap and container assembly of claim 1 , wherein the cap further comprises a removable cover, positioned over the first selectively permeable membrane.