Fluid-operated dispensing device

Claim 1

A dispensing device for dispensing liquid into a flowing stream comprising: a. a support; b. a dispensing conduit comprising a straight tubular member mounted horizontally on said support and having inlet and outlet passages; c. means connecting said inlet and outlet passages to a supply line and a discharge line respectively; d. a venturi passage formed in said dispensing conduit intermediate said inlet and outlet passages; e. a dispensing opening formed in said dispensing conduit downstream of and adjacent said venturi opening; f. a metering valve formed integral with said dispensing conduit and located immediately above said dispensing opening; g. a nipple conduit means integral with said dispensing conduit, opening into said conduit upstream of said venturi and extending vertically upward, said nipple and said valve terminating at substantially the same level; h. a liquid material supply container having first and second cavity portions communicating through an opening adjacent the top of said container, said top being closed, said first cavity portion terminating in a downwardly extending reduced neck portion and said second cavity portion terminating in a downwardly extending tubular-shaped pipe means; i. means for rigidly connecting said reduced neck portion and tubular shaped pipe means to said metering valve and nipple conduit means respectively, whereby said container will be supported in fixed position on said dispensing conduit; j. an interliner in the form of a flexible container terminating in a reduced neck portion of a size corresponding to that of the neck portion of said first cavity portion and located within said last mentioned neck portion; and k. whereby liquid entering the second cavity portion through the nipple conduit means will pass upwardly through the second cavity portion and the said opening adjacent the top of the container and will exert pressure on the outside of the flexible interliner.