Patent ID: 7337928
Filing Date: 2008-03-04
Classification: B05C,B65D

Abstract:
1. A leak proof pressure activated self opening closure seal for sealing over an interior nozzle opening of a cartridge type container used for dispensing flowable material when said cartridge is pressurized by an application gun; (a) said cartridge type container comprising: (b) said closure seal comprising: (c) 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; (d) 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; (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 an annular portion of said closure seal is bonded to said peripheral surface area of said dispensing nozzle of said wall end by said fourth layer of adhesive sealing over said interior opening of said dispensing nozzle of said cartridge type container; (g) wherein said closure seal is of sufficient strength to remain intact and retain said flowable material in said cartridge type container when said cartridge type container is filled with said flowable material; (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 flowable material to dispense out from said dispensing nozzle when said cartridge type container is pressurized by said application gun.