Abstract: Mixing apparatus includes a container for liquid and semi-liquid materials such as paint, and a mixing device in the container, the device having a planar mixing head disposed substantially parallel to the bottom wall of the container and a limb which extends substantially perpendicularly from a peripheral edge region of the mixing head adjacent to the container side wall. A coupling, located in the container, provides releasable connection to an external handle by which the mixing device is reciprocated vertically to agitate and mix the contents of the container. The mixing head may be of triangular, square, substantially circular, with opposed flanges, Y-shaped, or cruciform configuration, and the handle may have a flattened end for use in removing a lid from the container.

Abstract: A container 1 for liquid and semi-liquid materials such as paint has a bottom wall 2 and a side wall 3. A mixing device 6 is provided in the container, the device having a planar mixing head 7 disposed substantially parallel to the bottom wall 3, and a limb 8 which extends substantially perpendicularly from a peripheral edge region of the mixing head adjacent to the side wall 2 of the container. A coupling 9 is provided in the container for releasable connection with an external handle by which the mixing device is reciprocated vertically to agitate and mix the contents of the container. The handle may have a flattened end for removing a lid 4 from the container.

Abstract: Building materials such as concrete, mortar and plaster are placed in a bag which is suspended in a bottomless drum. A handle is used to move a plunger up-and-down through the bottom of the drum such that the plunger repeatedly moves part of the bag upwardly through the materials contained in the bag to cause mixing thereof. The drum is rotationally indexed with reciprocal movements of the plunger, which also moves laterally. The plunger has an interchangeable head having a leading face which is inclined with respect to the direction of lateral movement on the upward stroke, and at least one inclined downwardly-facing facet.