Abstract: A mixing device for use atop a plurality of containers that contain constituents that are to be mixed and dispensed is described. The device includes a head having an outlet and a cartridge that has inlets for accepting constituents from each of the plurality of containers, a mixing chamber, and a nozzle for dispensing a mixed product extending through the opening in the head. The device includes a means for securing the head to the containers. A mixing system can include the device together with the containers holding the constituents to be mixed.

Abstract: A windshield wiper blade including a multi-level mount at one end and a multiple projection wiping element at the opposite end. The wiping end includes a base member extending perpendicularly on opposite sides of a center line. A projected central member extends from the base along the center line at a distance greater than the overall distance of the base member. On each side of the central projecting member, between the opposite sides of the base member, is provided an angled member which projects at a length from the intersection of the central member and the base members for a length approximately equal to the length of the base member. The angled member includes pointed elements which are formed by the angle of projection and a flat surface which is parallel to the base member and thus perpendicular to the center line. In addition, the angled member is tapered outwardly and joins an outward taper of the central projecting member.