Self-closing liquid dispensing package
AssigneeThe Procter & Gamble Company
InventorJohn G. Chan
Life of this patent
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Abstract
The present invention relates to a self-closing liquid dispensing package comprising a liquid container and a self-closing flat channel valve in liquid communication with liquid container, wherein the liquid container comprises a reservoir portion for containing liquid. The reservoir portion is made of a thermoformed thermoplastic material. In one preferred embodiment of the present invention, the self-closing flat channel valve is in liquid communication with the container via a connection portion wherein the connection portion comprises a stiffening crease. The package of the present invention is useful for multiple use of various liquid products having a wide range of viscosity.
Claims5
A self-closing liquid dispensing package comprising:
- a) a liquid container, said liquid container including a reservoir portion for containing liquid;
- and
- b) a self-closing flat channel valve in liquid communication with said liquid container via a connection portion, said flat channel valve including a first sheet member and a second sheet member, said first and second sheet members being indexed face-to-face and sealed together and having an original planar position, said first and second sheet members also being sufficiently flexible to arch away from each other to form a flow channel therebetween to permit flow of liquid from said liquid container in response to external pressure applied to said liquid container, wherein at least one of said first and second sheet members has sufficient resilience to return said first and second sheet members to said original planar position when said external pressure is released, and wherein said connection portion includes a stiffening crease in at least one of said first and second sheet members to increase said resilience of said at least one of said first and second sheet members.
A self-closing liquid dispensing package comprising:
- a) a liquid container, said liquid container including a reservoir portion for containing liquid, said reservoir portion being made of a thermoformed thermoplastic material;
- and
- b) a self-closing flat channel valve in liquid communication with said liquid container via a connection portion, said flat channel valve including a first sheet member and a second sheet member, said first sheet member being a cover portion for said reservoir portion and said second sheet member having said reservoir portion thermoformed therein, said first and second sheet members being sealed together along a perimeter of said reservoir portion to form a flange, said flange having an unsealed portion which has an original planar position, said flange also being sufficiently flexible to permit said first and second sheet members arching away from each other at said unsealed portion to form a flow channel therebetween to permit flow of liquid from said liquid container in response to external pressure applied to said liquid container, wherein said flange has sufficient resilience to return to said original planar position when said external pressure is released, thereby closing said flat channel valve, and wherein said connection portion includes a stiffening crease in said second sheet member to increase said resilience of said flange.
Dependencies are inferred from the claim text.