| 摘要 |
A disc-shaped, soluble, chlorine base tablet is supported in a disposable plastic container on the upper ends of a pair of spaced partitions, which extend between the sidewalls of the container adjacent its midpoint. Movably mounted between the partitions beneath the tablet is an inverted, cup-shaped member, which has a water soluble dye cast or otherwise secured in its closed, upper end. The container has therein a pair of vertically spaced ports, and is adapted to be mounted in an upright position adjacent the bottom of a conventional toilet tank so that the lower port in the container permits a limited amount of water to flow in and out of the container each time the tank is flushed. After repeated flushings the water soluble tablet dissolves to a point where it permits the inverted cup member to float upwardly in the container, and to swing towards its upright position so that water in the container flows into engagement with the dye compositions. The dye then dissolves and is dispensed with the flushing water into the toilet bowl to provide a visible indication that the container should be replaced.
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