Patent ID: 6443333
Filing Date: 2002-09-03
Classification: B05C,B65D

Abstract:
An improved caulking cartridge, of the type having a substantially tubular body with a wall having an inner wall surface defining an inner diameter of the tubular body, a forward dispensing opening at a forward end of the tubular body, a backwall movably disposed within the tubular body, and the tubular body defining a chamber therein bounded by the inner wall surface, the forward end and the backwall, for storing therein a composition to be dispensed through the forward dispensing opening, the improvement which comprises:said backwall having a skirt formed thereon pointing backwardly away from said backwall and being formed with a stop surface distally from said backwall; said skirt having an outer diameter less than the inner diameter of the tubular body and forming a space between said skirt and the inner wall surface; a sealing ring disposed in said space between said skirt and the inner wall surface and sealing against the inner wall surface, said sealing ring having an axial width less than a spacing distance between said stop surface and said backwall, such that said backwall together with said skirt can be axially moved through a given distance while said sealing ring remains stationary on the inner wall surface.