Method of manufacturing a pressurized dispensing package

Claim 2

In a method of manufacturing a pressurized dispensing package having an outer container, an inner container containing an ingredient disposed within said outer container, the ingredient being sealed from said outer container and a dispensing valve assembly secured to said outer container and in communication with said inner container which includes the steps of forming said inner container and securing said inner container to said valve assembly, wherein the improvement comprises the steps of: securing at least one end portion of a length of organic plastic tubing, of the type shrinkable from a first stable dimension to a second stable dimension upon application of heat, to a thermal isolation member, heating another portion of said tubing and disposing said another position in a mold, expanding said heated another portion of said tubing against the wall of said mold by increasing the pressure in the interior of said another portion and then cooling said expanded another portion to form an inner container having a stable thin walled tubular flexible body portion, and at least one end portion defined by the portion secured to said thermal isolation member of greater wall thickness and less flexibility than said body portion, securing said one end portion of said inner container to said valve assembly by inserting said one end portion over a portion of said valve assembly and, heating said one end portion to shrink said one end portion toward said second dimension and form a mechanical joint between said one portion and said valve assembly portion.

Claim 3

The method as claimed in claim 1 wherein said valve assembly portion includes a dip tube structure, and said improvement includes the steps of inserting said end portion over said dip tube structure and shrinking said end portion against said dip tube structure to form said mechanical joint.

Claim 4

The method as claimed in claim 1 wherein said another portion is expanded until the wall thickness of said body portion is less than 20% of the wall thickness of said end portion.

Claim 5

The method as claimed in claim 1 wherein said valve assembly includes a dip tube structure and said improvement includes the steps of inserting said dip tube structure through said one end portion into said body portion until the inner end of said dip tube is adjacent the other end portion of said tubing, and sealing the inner end of said dip tube to said other end portion, prior to shrinking said one end portion to form said mechanical joint.

Claim 6

The method as claimed in claim 4 wherein said one end portion is heat shrunk around said dip tube near the outer end of said tube so that the ingredient in said inner container exits said inner container through said dip tube.

Claim 7

The method as claimed in claim 1 wherein both end portions of said length of heat shrinkable plastic tubing are secured to thermal isolation structure while said another portion is being expanded, and said another portion is between said end portions.

Claim 8

The method as claimed in claim 1 wherein said valve assembly includes a dip tube structure, said dip tube structure is inserted completely through said plastic tubing, and one of said end portions is heat shrunk against said dip tube adjacent the inner end of said dip tube to form a mechanical seal between said end portion and the outer wall of said dip tube, providing a bottom for said inner container, while allowing the inner end of said dip tube to be open to said outer container.

Claim 9

The method as claimed in claim 7 wherein both end portions of said length of heat shrinkable plastic tubing are secured to thermal isolation structure while said another portion is being expanded, and the other end portion is heat shrunk to said valve assembly adjacent the outer end of said dip tube to seal said inner container from said outer container.

Claim 10

The method as claimed in claim 8 wherein said another portion is expanded until the wall thickness of said body portion is less than 20% of the wall thickness of said mouth portion.

Claim 11

In a method of manufacturing a pressurized dispensing package which includes the steps of forming an inner container, disposing an ingredient to be dispensed in the inner container, securing the inner container to a valve assembly, and disposing the inner container-valve assembly in an outer container, wherein the improvement comprises the steps of: securing one end portion of a length of organic plastic tubing, of the type shrinkable from a first stable dimensional state to a second stable dimensional state, upon application of heat, to a thermal isolation member, heating another portion of said tubing to reduce its diameter, forming a seal in the end of said other portion of said tubing, elongating said other portion of said tubing, disposing said elongated section of said tubing in a mold, expanding said elongated section against the cool wall of said mold by increasing the pressure in the interior of said elongated section to form an inner container having a stable thin walled tubular flexible body portion, and a mouth portion of greater wall thickness and less flexibility than said body portion defined by said end portion secured to said thermal isolation member, disposing said ingredient to be dispensed in said inner container, securing said mouth portion of said inner container to a portion of said valve assembly by inserting said mouth portion over said valve assembly portion and heating said mouth portion to shrink said mouth portion toward said second dimension and form a mechanical joint between said mouth portion and said valve assembly portion, and disposing said inner container-valve assembly in said outer container.

Claim 12

In a method of manufacturing a pressurized dispensing package which includes the steps of forming an inner container, disposing an ingredient to be dispensed in the inner container, securing the inner container to a valve assembly, and disposing the inner container-valve assembly in an outer container, wherein the improvement comprises the steps of: securing one end portion of a length of organic plastic tubing, of the type shrinkable from a first stable dimensional state to a second stable dimensional state, upon application of heat, to a thermal isolation member, heating another portion of said tubing to reduce its diameter, forming a seal in the end of said other portion of said tubing, elongating said other portion of said tubing, disposing said elongated section of said tubing in a mold, expanding said elongated section against the cool wall of said mold by increasing the pressure in the interior of said elongated section to form an inner container having a stable thin walled tubular flexible body portion, and a mouth portion of greater wall thickness and less flexibility than said body portion defined by said end portion secured to said thermal isolation member, disposing said ingredient to be dispensed in said inner container, securing said mouth portion of said inner container to a portion of said valve assembly by inserting said mouth portion over said valve assembly portion and heating said mouth portion to shrink said mouth portion toward said second dimension and form a mechanical joint between said mouth portion and said valve assembly portion, and disposing said inner container-valve assembly in said outer container.