Method of manufacturing of a barrier package

Claim 1

The method of making a barrier package containing a propellant separated from a product to be dispensed, comprising the steps of: a. forming a container having first and second walls and an intermediate wall extending therebetween; b. covering at least about one-half of the inner surface of said container, including said second wall, with a substantially impermeable continuous coating in intimate contact with said inner surface; c. adhesively bonding and sealing said coating to said inner surface, at least throughout substantially all of the area thereof covering said intermediate wall, the strength of said bond being less than the tensile strength of said coating; d. placing a charge of product, less than the internal volume of said container, through said first wall and inside said coated container; e. introducing a propellant through said second wall to separate an initial portion of said coating therefrom and push said separated coating toward said first wall, until said product and propellant substantially fill said container while leaving the remainder of said coating bonded to said container whereby permeation of product or propellant through said coating cannot occur through the bonded remainder thereof during shelf storage and whereby progressive release of product through said first wall will progressively strip said remainder of said coating from said intermediate wall and thereby control the permeability potential of said coating.

Claim 2

The method of making a barrier package containing a propellant separated from a product to be dispensed, comprising the steps of: a. forming a container having first and second walls and an intermediate wall extending therebetween; b. covering at least about one-half of the inner surface of said container, including said second wall, with a substantially impermeable continuous coating in intimate contact with said inner surface; c. adhesively bonding and sealing said coating to said inner surface, at least throughout substantially all of the area thereof covering said intermediate wall, the strength of said bond being less than the tensile strength of said coating; d. placing a charge of product, less than the internal volume of said container, through said first wall and inside said coated container; e. introducing a propellant through said second wall to separate an initial portion of said coating therefrom and push said separated coating toward said first wall, until said product and propellant substantially fill said container while leaving the remainder of said coating bonded to said container whereby permeation of product or propellant through said coating cannot occur through the bonded remainder thereof during shelf storage and whereby progressive release of product through said first wall will progressively strip said remainder of said coating from said intermediate wall and thereby control the permeability potential of said coating.