Abstract: A mold for injection molding or diecasting machines, which comprises two closable mold parts defining a die cavity therebetween in a closed position of the mold parts, and inserts slidably movable in rectilinear guides in respective ones of the mold parts. The guides leading into the die cavity have a taper narrowing in a closing direction of the mold parts, and the inserts have guide surfaces Inning at a slant to the taper of the guides.

Abstract: A cupping instrument comprises a vacuum cup integrally comprising an outlet hole at one end thereof, an annular socket concentrically surrounding the outlet hole, and a cylindrical tubular extension extending from the one end and surrounding the outlet hole and the annular socket. A suction valve for opening and closing the outlet hole is disposed in the annular socket and comprises a sealing disk, a centrally disposed die-cut valve disk, an annular outer portion surrounding the valve disk, and at least one bridge integrally connecting the annular outer portion to the valve disk. An aspirator is connected to the vacuum cup, the aspirator comprising an aspirator cylinder detachably mounted in the cylindrical tubular extension and having a forward end wall facing the outlet hole and defining an aspirating opening concentrically surrounding the outlet hole.

Abstract: A disposable syringe comprises a syringe cylinder and a syringe piston. The syringe cylinder is open at one end and at its other end has an end wall, which is closed with the exception of a region adjacent to a needle holder. The syringe piston comprises a piston skirt, which protrudes from the syringe cylinder, and a piston head, which is disposed within the syringe cylinder and provided with an annular seal. The annular seal is connected to the piston head by an annular peripheral flange.In order to provide a syringe which can easily be actuated and is nevertheless absolutely tight, the flange is frustoconical and flares toward the piston skirt. The radial distance from the inside peripheral surface of the hollow frustoconical flange to the piston skirt increases continuously. The flange is adjoined by the annular seal, which consists of a coaxial cylinder and freely protrudes on the side of the piston head.