Method of moulding containers from at least two different plastic materials, machine for carrying out this method and containers obtained thereby

Abstract From the Canadian patent

A method of moulding containers consisting of two plastic materials compatible with and sealable to each other of, differing nature and/or colour, wherein the material is injected into a space provided between the walls of a mould and a counter-mould, and comprising defining within said space by means of removable separators a first and a second sub-space; injecting into said first sub-space a first one of said materials to fill it fully, injecting into the second subspace the second material, removing said separators and keeping injecting under pressure said second material until local interpenetration thereof.