초록 ▼

This relates to the base configuration of a biaxially oriented blow molded thermoplastic resin container. It has been found that by assigning more space to the ribs between adjacent legs and feet, during the blow molding of a preform, there is proportionally less thinning of the material of the pref

This relates to the base configuration of a biaxially oriented blow molded thermoplastic resin container. It has been found that by assigning more space to the ribs between adjacent legs and feet, during the blow molding of a preform, there is proportionally less thinning of the material of the preform in accordance with the greater width of rib, thereby providing greater strength in the high stress area of the base structure with a resultant lesser failure due to stress cracking.

대표청구항 ▼

A base configuration for an internally pressurized container, said base configuration being generally circular in outline and comprising a maximum of five radiating legs each terminating in a foot recessed radially inwardly of the circular outline of said base configuration, and said legs being sepa

A base configuration for an internally pressurized container, said base configuration being generally circular in outline and comprising a maximum of five radiating legs each terminating in a foot recessed radially inwardly of the circular outline of said base configuration, and said legs being separated by a radially extending rib, said base configuration being improved by said legs and feet being generally of the same outline of ribs and legs in a base configuration having six legs and feet and said ribs being of a greater width than like ribs in a base configuration having six legs and feet.