초록 ▼

A bottle for carbonated beverage is moulded from polyethylene terephthalate (PET) thermoplastics resin and has a recessed base (14) formed by a standing ring (15) and an outwardly domed central panel (21). A ring member attached to the base by spin-welding receives the crest (19) of the standing rin

A bottle for carbonated beverage is moulded from polyethylene terephthalate (PET) thermoplastics resin and has a recessed base (14) formed by a standing ring (15) and an outwardly domed central panel (21). A ring member attached to the base by spin-welding receives the crest (19) of the standing ring and extends along the inner wall of the standing ring to the central panel so as to control distortion of the base when the bottle is pressurized. The ring member is made of PET so that the bottle is readily recyclable.

대표청구항 ▼

A thermoplastics container having a body with a standing base, the base being formed with a central recess and having a standing ring with a crest which defines the periphery of the recess, for controlling distortion of the base against internal pressure of the container, the container further inclu

A thermoplastics container having a body with a standing base, the base being formed with a central recess and having a standing ring with a crest which defines the periphery of the recess, for controlling distortion of the base against internal pressure of the container, the container further including a ring member which receives the crest of the standing ring in generally nested relation, the ring member being of a thermoplastics material which is mutually weldable with that of the base, and the ring member being welded to the base radially outwardly of the crest but radially inwardly of the crest being free of the base so that the base is movable relative thereto, said ring member and base comprising means whereby, radially inwardly of the crest, the base is spaced from the ring member when the container is unpressurised, but moves into abutment with the ring member and is thereby supported against further distortion when the container is pressurised.