Container of thermoplastic material for containing liquids
AssigneeThe Procter & Gamble Company
InventorPetros Kalkanis
Life of this patent
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Abstract
A container (1) of thermoplastic material for containing liquids comprises an anti-bulging base (5) comprising a flat ring-shaped section (9) and a central dome-shaped section (11). The diameter of the central dome-shaped section (11) is relatively large and comprises at least 60% of the diameter of the container (1). The central dome-shaped section (11) consists of a lateral wall (15) of relatively large radius of curvature and a relative flat cap (17). The ring-shaped section (9) acts as a spring, giving away to internal pressure build-up in the container, which preferably is a household bleach bottle of polyethylene. Thus the pressure on the central dome-shaped part (11), which is designated for minimum thickness and maximum strength, is relieved.
Claims7
Container of thermoplastic material for containing liquids, the container having a side wall and a base connected to the side wall, the base generally extending transverse to the side wall, the base comprising:
- a curved section connected to the sidewall,
- a ring-shaped section connected to the curved section, the ring-shaped section having an inclination with respect to a plane perpendicular to a longitudinal axis of the container and
- a central dome-shaped section connected to the curved section, wherein
- the central dome-shaped section has in the plane of a cross-section perpendicular to the base, the plane comprising a central, longitudinal axis of the container, a dimension that is larger than 60% of a dimension, d.sub.c, of the container along the cross section, both dimensions being measured in a direction perpendicular to the central, longitudinal axis, the central dome-shaped section comprising a lateral wall of radius of curvature r.sub.1 such that 0.03 d.sub.c <r.sub.1 <0.22 d.sub.c and a cap of radius of curvature r.sub.2 such that 0.3 d.sub.c <r.sub.2 <1.6 d.sub.c.
Dependencies are inferred from the claim text.