Plural nested preform assembly and method of manufacture
AssigneeThe Procter & Gamble Company
InventorsDouglas Bruce ZEIK, Matthew Aaron NEUMANN, Scott Edward SMITH
Life of this patent
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Abstract
A plural preform assembly having nested preforms. The preforms are held together by an interference fit. The interference fit is provided by the friction between the preforms which occurs when the inner preform is inserted into the outer preform. At least one preform may have ribs extending radially towards the other preform. The ribs provided concentricity and interference to hold the preforms together during subsequent operations. The preforms may later be blow molded to provide a bag in bottle or similar container.
Claims20
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, and
- 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 mechanically joined at said respective open ends by a radial interference fit.
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 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 container, 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 mechanically joinable at said respective necks by a radial interference fit, and not touching the other at said respective sidewalls or respective closed ends,
- said inner preform and said outer preform being moldable to form an aerosol dispenser having a bag therein.
A method of making a bag in bottle assembly, said method comprising the steps of:
- a. providing a plural preform assembly for container, 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 container, 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 and said outer preform being joined together by an interference fit,
- b. blowmolding said plural preform assembly while said inner preform is substantially disposed in said outer preform to form a bag in bottle assembly having a collapsible blown bag within an outer container, and
- c. permanently joining said collapsible blown bag and said outer container at said respective neck,
- wherein said steps a, b and c are performed in sequence.
Dependencies are inferred from the claim text.