Importance

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Abstract

Apparatus for mixing charges of flowable material has an open-top vessel movable up and down by fluid-operated motors along vertical guides, either with or relative to a cover which can seal the open top and is provided with an inlet for admission of fresh charges. The extent to which the cover is movable along the guides is limited by followers which are provided on the cover and extend into channels of the guides. The cover carries one or more rotary agitating devices with orbiting blades which mix the contents of the vessel while the open top is sealed by the cover. The central portion of the concavo-convex bottom wall of the vessel has an outlet normally sealed by a closure which is pivotable by a fluid-operated motor. The vessel is lowered away from the cover for the purposes of cleaning. The blades of at least one agitating device are preferably hollow and are designed in such a way that they agitate the contents of the vessel in response to rotation in one direction and that they push the contents of the vessel toward the outlet in the bottom wall in response to rotation in another direction counter to the one direction.

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First Claim