Abstract: A scroll fluid machine comprising an upper and a lower scrolls provided in and upper and a lower positions, respectively, in a casing and supported eccentrically to each other; a coupling whose central member is provided under the lower scroll and whose peripheral member is provided at the upper scroll and conjoined to the central member; and a shallow oil storage recess provided at the bottom of the inside of the casing near the central member and facing the central member.

Abstract: A method for manufacturing a plastic foam, wherein a plastic compound with chemical foaming agent is charged in molding cavity which is defined by a pair of upper and lower die cavities and wherein the plastic compound is subject to a dielectric heating, so that the chemical foaming agent decomposes. One of the cavity surfaces is movable to vary the volume of the molding cavity in accordance with the expansion of the plastic compound, so that the movable cavity surface is kept in contact with the plastic compound which expands during heating.

Abstract: A method of manufacturing a plastic molding of a foamable thermoplastic raw material blank or preform which contains a foaming agent by high frequency voltage heating in a molding die assembly defining a molding cavity, wherein gas discharging openings which extend through the thickness of the blank or preform are preformed in the raw material blank or preform.