Patent ID: 6547503
Filing Date: 2003-04-15
Classification: B21D,B65D,Y10S

Abstract:
A method of manufacturing a pressurized two-chambered container and in particular a rotationally symmetrical aerosol can, comprising the steps of:forming a housing with an opening sealable tightly by a barrier in form of a spray-or-aerosol valve; forming a product chamber and a propellant chamber separated fluid-tight from each other by a flexible diaphragm or pouch in said housing; charging said product chamber with a product, said product in said can being releasable through said valve, said propellant chamber being chargeable with a compressed propellant; communicating said product chamber with the product-release opening; leaving open at least one end of a blank to constitute subsequently said housing with said propellant chamber and said product chamber; inserting said diaphragm into said blank through the open end; and forming thereafter said blank into said housing; reforming an edge of said open end of said blank to narrow it into an integral mouthpiece accommodating said product-release opening, when forming said blank into said housing; said mouthpiece being integral with said housing, said mouthpiece being formed from a cylindrical form to a conical form after insertion of said diaphragm, said diaphragm being applied at said edge; wherein said end of said blank is opposite the end left open and is formed into a base with a bore to manipulate said diaphragm therethrough, and wherein including a step of lifting said pouch by manipulating said pouch with compressed air or a tappet extending through said bore.