Abstract: An apparatus for encapsulating magnetic particles by enclosure within oil drops, mixing in an aqueous solution and dispersing the oil drops with the enclosed particles by application of an alternating magnetic field. The dispersed and oil covered particles are microencapsulated with at least one type of polymer.

Abstract: A method for encapsulating magnetic particles by enclosure within oil drops, mixing in an aqueous solution and dispersing the oil drops with the enclosed particles by application of an alternating magnetic field. The dispersed and oil-covered particles are microencapsulated with at least one type of polymer.

Abstract: Apparatus and method for making small spherical particles comprising rotating a toothed disc at a constant speed. Heating means are provided to heat the spinning toothed disc so that when material from which the particles are to be made touches the toothed disc the material will melt and migrate to the teeth and form beads on the teeth. As the tooth disc rotates, centrifugal force causes the beads to be thrown off and form spheres as the falling beads cool off and re-solidify.

Abstract: A method for coating, etching, or coloring a portion of the surface of small articles wherein a plurality of the small articles are supported mainly by the surface tension of the interface between air and a liquid containing a desirable coating, etching, or coloring solution. The small articles are then removed from the solution with the result being that only the portion of the article in contact with the solution becomes treated. The size of the portion of the surface of the small article to be treated can be controlled by adding surfactants to the solution to vary the surface tension.

Abstract: A dental floss applicator for use in dispensing and supporting a strand of dental floss under tension for cleaning the teeth comprises an elongated supporting frame having on one end two spaced furcations laterally extending therefrom. Tips on the furcations are provided with floss-guiding portions by means of which a floss strand may be tensioned therebetween. A capstan device is frictionally mounted for rotation on said frame and further is provided with supply and take-up capstan portions axially spaced apart. A supply of floss strand is carried by the frame. The take-up capstan portion is of slightly larger circumference than is the supply capstan portion.