Thermoplastic preform for blow molding a bottle with reinforcing

Details Thermoplastic preform for blow molding a bottle with reinforcing Thermoplastic preform for blow molding a bottle with reinforcing

1991-10-28

1992-06-30

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

4285428, 428 357, 215 1C, 220669, 220671, 220673, 220675, B29B 1114

Patent

active

051261774

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.

REFERENCES:
patent: 3784040 (1974-01-01), Douglas
patent: 4307137 (1981-12-01), Ota
patent: 4890757 (1990-01-01), Robbins
patent: 4977005 (1990-12-01), Krishnakumar
patent: 4997692 (1991-03-01), Yoshino

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