Importance

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Abstract

Apparatus for controllably treating a liquid with a liquid treatment substance includes a body having a first portion providing a container-receiving zone and an opening leading into this zone, as well as a second portion having a liquid inlet and a liquid outlet defining a liquid flow path between them, with the zone being in communication with the liquid flow path. The apparatus also includes a container for a liquid treatment substance. The container comprises a cylindrical sleeve, an end piece closing off a first end of the cylinder sleeve, apertures in the sleeve in proximity to the first end, and seal means between the first end of the sleeve and the aperture. The container is movable from an inoperative position in which the seal means seals fluid tightly against the first portion to prevent liquid passing from the flow path into the aperture, to an operative position in which the first end of the sleeve protrudes at least partially into the flow path. The apparatus further includes bias means inside the body for biassing the first end of the sleeve out of the liquid flow path; actuating means for varying the degree to which the first end of the sleeve protrudes into the flow path; and liquid regulating means inside the body for permitting controlled passage of a slip stream of liquid from the flow passage across the seal means into and out of the inside of the sleeve via the apertures in the sleeve, when the container is in its operative position.

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First Claim