Patent ID: 6373786
Filing Date: 2002-04-16
Classification: B65D,G01K

Abstract:
A cap for a hermetically sealed container, said cap providing a visually observable indication of elapsed time from the opening of the seal of said container, said cap including means for releasing a chemical which effects a color change which traverses a chamber formed therein, said chamber being provided with a transparent section for viewing the contents thereof and said released chemical effecting a cumulative, progressive, graphic color change of said section with time, wherein said chamber contains a porous strip for controlled migration of said chemical whereby said color change progresses over time to show elapsed time from the opening of the seal, the arrangement being such that manipulation of said cap to open said container and said seal effects activation of said releasing means, said cap comprising at least two parts movable relative to each other and having said chamber formed therebetween, at least one of said parts being provided with said transparent section for viewing said chamber and wherein one of said parts includes a recess having a fluid-containing capsule and said other part is provided with a protrusion which is brought into alignment with said recess on opening of said container and is adapted to rupture said fluid-containing capsule.