Patent ID: 6578737
Filing Date: 2003-06-17
Classification: B05C,B65D

Abstract:
A method of opening a cartridge nozzle of the type having a side wall, a bore and a base used on a cartridge containing flowable filler material, such cartridge utilized within a cartridge gun of the type having a plunger moved by trigger action that upon trigger activation pressurizes said filler material, comprising the steps of:providing a nozzle having a sharp edge fixed in position at the base of the side wall of said nozzle; providing a stretchable seal member disposed under the base of said nozzle extending under said sharp edge of the base of said side wall of said nozzle, said seal member spaced a distance away from said puncture means; pressurizing said filler material by advancing the plunger of said cartridge gun; convexly stretching and moving said seal member by the pressure on said filler material to contact said sharp lower edge of said base wall of said nozzle; and puncturing said seal member by the action of said seal member being moved and forced against said sharp lower base wall of said nozzle to allow said filler material to pass through said punctured seal member into said nozzle.