초록 ▼

Biaxially oriented, hollow plastic bottle of thermoplastic material having an improved base. The base includes a plurality of circumferential rings occupying substantially the entire space between the central portion of the base and the outer supporting rim of the base. In one embodiment, the rings

Biaxially oriented, hollow plastic bottle of thermoplastic material having an improved base. The base includes a plurality of circumferential rings occupying substantially the entire space between the central portion of the base and the outer supporting rim of the base. In one embodiment, the rings form substantially uniform, continuous, uninterrupted, circumferential, pyramidal ridges and adjacent depressions. In a further embodiment, some of the rings are interrupted by flat areas.

대표청구항 ▼

1. A hollow plastic bottle, which comprises:a hollow body of thermoplastic material having a generally cylindrical side wall, an upper end with a dispensing opening therein, and a lower supporting base with an inwardly extending portion having an outside surface thereof; wherein said outside surface

1. A hollow plastic bottle, which comprises:a hollow body of thermoplastic material having a generally cylindrical side wall, an upper end with a dispensing opening therein, and a lower supporting base with an inwardly extending portion having an outside surface thereof; wherein said outside surface of said inwardly extending base includes a continuous outer supporting annular rim for supporting the bottle on a surface; a central portion of the inwardly extending portion of said base; and wherein the space between the central portion of the base and the outer supporting rim includes a plurality of substantially uniform, continuous, uninterrupted, circumferential rings forming substantially uniform, continuous, uninterrupted, circumferential, pyramidal ridges and adjacent depressions, wherein said space also includes a plurality of additional substantially uniform, circumferential rings forming pyramidal ridges and adjacent depressions, said additional rings having at least one substantially flat area thereon.