| 摘要 |
A reinforced base 1 for a plastics bottle 8, having an annular rim upon which the bottle rests; a concave dome 3 bounded by the rim 2, with the concavity facing the outside of the bottle body. The dome comprises three regions: (i) an outer, annular region 4, adjacent the rim; (ii) an in inner, circular region 5, at the centre of said dome; and (iii) a middle, annular region 6, between the outer and inner regions. A number of spaced apart geometrical configurations 7 in the form of closed polygonal or circular formations are located on middle annular region of the dome, whereas the outer annular region, which comprises at least 7.5% of the area of the dome, is free of said geometrical configurations. Variants with concave wall portions are also included. The geometrical configurations may include tessellating regular polygons, and the polygons may be hexagonal. The wall 8 of the bottle may include circumferential reinforcements to resist deformation of the bottle under a vacuum, the reinforcement may include a grooves. |
