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.
Claims13
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 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 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, and
- an intermediate preform disposed between said inner preform and said outer preform,
- said inner preform and said outer preform being mechanically joined at said respective open ends by a radial friction 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 neck 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 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 open neck and said outer preform open neck being mechanically joinable by a radial friction 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, and
- ribs on at least one of said inner preform and said outer preform, said ribs radially extending towards the other, and 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.
Dependencies are inferred from the claim text.