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Biaxially oriented, hollow plastic bottle of thermoplastic material having an improved base. The base includes an outer supporting annular rim for supporting the bottle on a surface and an inwardly extending portion of the base, wherein the space between the central portion of the base and the outer

Biaxially oriented, hollow plastic bottle of thermoplastic material having an improved base. The base includes an outer supporting annular rim for supporting the bottle on a surface and an inwardly extending portion of the base, wherein the space between the central portion of the base and the outer supporting rim includes a plurality of struts extending radially from the central portion of the base towards the annular rim.

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 base inclu

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 base includes a continuous outer supporting annular rim for supporting the bottle on a surface; a central portion of said base; and wherein the space between the central portion of the base and the outer supporting rim includes a plurality of struts extending radially from the central portion of the base towards the annular rim, and wherein said base includes a peripheral stepped area to facilitate stacking located between the annular rim and struts. 2. A hollow plastic bottle according to claim 1, which is blow molded. 3. A hollow plastic bottle according to claim 1, which is biaxially oriented. 4. A hollow plastic bottle according to claim 1, wherein said bottle is polyethylene terephthalate. 5. A hollow plastic bottle according to claim 1, wherein said bottle is a polyolefin. 6. A hollow plastic bottle according to claim 1, including from 6 to 10 of said struts. 7. A hollow plastic bottle according to claim 1, wherein said struts extend over a substantial portion of the base. 8. A hollow plastic bottle according to claim 1, wherein said struts extend outwardly from the plane of the base. 9. A hollow plastic bottle according to claim 1, wherein said inwardly extending portion of the base includes a substantially smooth inside surface opposed to said outside surface. 10. A hollow plastic bottle according to claim 9, wherein the central portion of the base includes a downwardly extending outside portion and a flat inside surface opposed to said downwardly extending outside portion. 11. A hollow plastic bottle according to claim 1, including a continuous curved portion extending upwardly from the annular rim to the central portion of the base. 12. A hollow plastic bottle according to claim 1, wherein said bottle includes a neck portion of reduced diameter between the upper end and side wall. 13. A hollow plastic bottle according to claim 1, wherein said annular rim includes information thereon. 14. A hollow plastic bottle according to claim 13, wherein at least three sites for said information are provided substantially uniformly spaced around said annular rim. 15. A hollow plastic bottle according to claim 14, including three of said sites which separately include one of symbols, at least one number, and at least one letter embossed thereon. 16. A hollow plastic bottle according to claim 1, wherein said struts are uniformly spaced around the central portion of the base. 17. A hollow plastic bottle according to claim 1, wherein said struts extend outwardly from the central portion of the base on the inwardly extending portion of the base.