Pressurized plural nested preform assembly and method of manufacture
AssigneeThe Procter & Gamble Company
InventorsScott Edward Smith, Larry Leroy Huston
Life of this patent
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Abstract
A plural preform assembly having nested preforms with an inner preform and an outer preform. The preforms are sealably joined together, defining a volume between the preforms. Propellant is disposed in the volume between the preforms. The preforms are later blow molded to provide a bag in bottle, bottle in bottle or similar container. The propellant charge is already present when blow molded, preventing the need for a later propellant filling step.
Claims16
A method of making a plural preform assembly for a bag in bottle, said method comprising the steps of:
- a. providing a plural preform assembly, said plural preform assembly having a longitudinal axis defining a longitudinal direction, said plural preform assembly having an outer preform having an outer preform open end and an outer preform closed end longitudinally opposed thereto, an outer preform sidewall joining said outer preform open end and said outer preform closed end, said outer preform having an outer preform inner surface and an outer preform outer surface, and an inner preform disposed in said outer preform, said inner preform having an inner preform open neck and an inner preform closed end longitudinally opposed thereto, an inner preform sidewall joining said inner preform open end and said inner preform closed end, said inner preform having an inner preform inner surface and an inner preform outer surface, said inner preform being disposed within said outer preform to define a volume therebetween,
- b. charging said volume with propellant so that said propellant is at a pressure greater than atmospheric pressure, and
- c. sealably joining said inner preform and said outer preform so that said propellant is contained in said volume, wherein said steps a, b and c are performed in sequence.
A plural preform assembly for a container, said plural preform assembly having a longitudinal axis defining a longitudinal direction, said plural preform assembly comprising:
- an outer preform having an outer preform open end and an outer preform closed end longitudinally opposed thereto, an outer preform sidewall joining said outer preform open end and said outer container closed end, said outer preform having an outer preform inner surface and an outer preform outer surface,
- an inner preform disposed in said outer preform, said inner preform having an inner preform open end and an inner preform closed end longitudinally opposed thereto, an inner preform sidewall joining said inner preform open end and said inner preform closed end, said inner preform having an inner preform inner surface and an inner preform outer surface,
- said inner preform and said outer preform being sealably joined at said respective open ends,
- an intermediate preform disposed between said inner preform and said outer preform;
- and
- propellant disposed intermediate said inner preform and said outer preform.
A plural preform assembly for an aerosol container, said plural preform assembly having a longitudinal axis defining a longitudinal direction, said plural preform assembly comprising:
- an outer preform having an outer preform neck with an open end and an outer preform closed end longitudinally opposed thereto, an outer preform sidewall joining said outer preform open end and said outer preform closed end, said outer preform having an outer preform inner surface and an outer preform outer surface,
- an inner preform disposed in said outer container, said inner preform having an inner preform neck with an open end and an inner preform closed end longitudinally opposed thereto, an inner preform sidewall joining said inner preform open end and said inner preform closed end, said inner preform having an inner preform inner surface and an inner preform outer surface, and
- ribs on one of said inner preform and said outer preform, said ribs radially extending towards the other, and further comprising complementary notches on the other of said outer preform and said inner preform, said ribs intercepting said notches when said inner preform and said outer preform are removably joined together,
- said inner preform and said outer preform being sealably joined at said respective necks and not touching the other at said respective sidewalls or respective closed ends, and defining a volume of not more than 50 ml between said inner preform and said outer preform, and propellant disposed in said volume.
Dependencies are inferred from the claim text.