Patent ID: 7661565
Filing Date: 2010-02-16
Classification: B65D

Abstract:
1. A leak proof pressure activated self opening closure seal for sealing over a dispensing opening of a flexible container used for containing and dispensing pourable material, said flexible container comprising: (a) a tubular body portion with a sealed bottom end, an opposite top end forming a pour spout that includes means for securing a closure cap; said pour spout ending with an exterior rim providing a surface area for bonding said closure seal over said dispensing opening of said pour spout; (b) said closure seal comprising: a first layer of frangible sheet material, a second layer of adhesive, a third layer of strengthening sheet material, a fourth layer of adhesive; (c) wherein said first layer of frangible sheet material, said second layer of adhesive, said third layer of strengthening sheet material, and said fourth layer of adhesive are permanently laminated together forming said closure seal; (d) wherein said second layer of adhesive, said third layer of strengthening sheet material and said fourth layer of adhesive each contain a duplicate cut out void configuration that are in alignment with each other; (e) wherein said duplicate cut out void configuration creates a weak area in said closure seal by leaving only said first layer of frangible sheet material covering over said duplicate cut out void configuration; (f) wherein a peripheral portion of said closure seal is bonded to said exterior rim of said flexible container by said fourth layer of adhesive sealing over said dispensing opening of said pour spout; (g) wherein said closure seal is of sufficient strength to remain intact and retain said pourable material in said flexible container when said flexible container is gripped, uncapped and inverted by a consumer; (h) wherein said closure seal is of sufficient weakness to break open only in said weak area of said duplicate cut out void configuration thereby allowing said pourable material to dispense from said pour spout when said flexible container is pressurized by said consumer squeezing or striking said flexible container.