Importance

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Abstract

A plastic refillable bottle and a plastic screw-on closure for the bottle, the bottle having a one-piece molded hollow body and integral neck, the walls of the body and neck being of generally uniform thickness, the neck having an opening through which material in the bottle passes when being dispensed and being formed with a helical thread, the closure being configured to extend across the bottle mouth and having a skirt for overlying the bottle neck, the closure skirt having a thread complementary to the thread on the neck and enabling the closure to be tightened onto the neck and effect a seal adequate to avoid excessive leakage of the contents out of the bottle through an interface between the skirt and neck, interior surfaces of the bottle and closure including the areas of the bottle and closure forming the respective threads being devoid of concave surface areas with a radius smaller than about ⅛″ at corners forming an angle of less than 135°.

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First Claim