| 摘要 |
An improved mixing apparatus for mixing a liquid and a particulate solid material within a container such that the pigments and/or other solid particulate materials, which are initially precipitated out and usually accumulated at the bottom of the container, are rapidly and thoroughly mixed and dispersed throughout the liquid in a uniform manner such that substantially all of the particulate material is dispersed within the liquid. In one embodiment, a flow pattern in the form of an inverted vortex rising from the bottom center of the container is created by a rotating frusto-conically shaped impeller to pull the particulate material away from the bottom of the container. In another embodiment, the apparatus includes a cover mechanism, which is made to function integrally with the mixing apparatus, and which covers the container during the mixing operation to prevent the escape of fumes or spray. The cover mechanism is further provided with an access portion which is operable to allow ready access to the interior of the container without removal of the cover mechanism and which permits the taking of samples of the liquid being mixed well as convenient and ready access for other purposes during the mixing operation.
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