Filling aerosol containers

Claim 1

A METHOD OF PRODUCING A PRESSURIZED PRODUCT IN A DISPENSING CONTAINER WHICH COMPRISES APPLYING A FUSIBLE MATERIAL TO AN OUTSIDE WALL OF A WALLED METAL CONTAINER HAVING A FILLING OPENING, COATING SAID WALL ON THE OUTSIDE THEREOF WITH RESINOUS PROTECTIVE MATERIAL, LANCING THE SAID WALL AND FUSIBLE MATERIAL THEREON FROM THE INSIDE OF THE CONTAINER BEFORE PRESSURIZING TO MAKE A PRESSURIZING OPENING, THEREBY CAUSING THE EDGES OF THE OPENING MADE IN SAID METAL WALL TO PROJECT OUTWARDLY INTO SAID FUSIBLE MATERIAL AS TONGUE-LIKE SIDES, ADDING TO THE CONTAINER THROUGH THE FILLING OPENING A SEPARATORY PISTON, ADDING MATERIAL TO BE DISPENSED TO THE CONTAINER THROUGH THE FILLING OPENING, AFFIXING DISPENSING MEANS TO THE CONTAINER AND SEALING THE FILLING OPENING SO THAT THE CONTAINER IS CLOSED, WITH THE EXCEPTION OF THE LANCED OPENING THROUGH SAID WALL AND THE FUSED MATERIAL THEREON, PRESSURIZING THE CONTAINER BY FLOWING PROPELLANT MATERIAL INTO IT THROUGH THE SAID LANCED OPENING, AND MELTING SAID FUSIBLE MATERIAL, THEREBY CAUSING SAID FUSIBLE MATERIAL TO FLOW AROUND SAID TONGUE-LIKE SIDES TO HERMETICALLY SEAL THE LANCED OPENING.