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US 5,126,177 AGranted
Thermoplastic preform for blow molding a bottle with reinforcing ribs
AssigneeJohnson Enterprises, Inc.
InventorDonald R. Stenger
Life of this patent
Estimating the term…
Abstract
A preform injection molded from PET includes a frustoconical section whose outer surface is formed with a series of angularly spaced ribs. When the preform is converted into a bottle by a blow molding operation, the frustoconical section of the preform is converted to a frustoconical top breast for the bottle while the external ribs of the preform are converted into internal ribs which are spaced angularly around the inner side of the top breast to increase the column strength thereof.
Claims8
A preform for use in blow molding a container;
- said preform being made of a single piece of thermoplastic material and having a generally cylindrical neck section, having a generally cylindrical body section spaced axially from said neck section and having a generally frustoconical section located between said neck section and said body section;
- said frustoconical section having an outer surface which increases in diameter upon progressing away from said neck section and toward said body section;
- and a plurality of ribs spaced angularly around and projecting outwardly from the outer surface of said frustoconical section.
A preform for use in blow molding a container;
- said preform being made of a single piece of thermoplastic material and having a generally cylindrical neck section, having a generally cylindrical body section spaced axially from said neck section and having a generally frustoconical section located between said neck section and said body section;
- said frustoconical section having an outer surface which increases in diameter upon progressing away from said neck section and toward said body section;
- a plurality of ribs spaced equally around and projecting outwardly from the outer surface of said frustoconical section, each rib extending substantially axially along said frustoconical section and including a first end located closely adjacent the junction of said frustoconical section with said neck section, each rib including a second end located closely adjacent the junction of said frustoconical section with said body section, each rib progressively increasing in circumferential width and progressively increasing in radial thickness as such rib proceeds from its first end toward its second end.
Dependencies are inferred from the claim text.