Apparatus for forming plastic material gaskets in stoppers comprising a cup, such as screw-on and crown caps

An apparatus for forming plastic material gaskets in stoppers comprising a cup, such as screw-on caps, crown caps, and the like, characterized in that it comprises a carousel which carries a plurality of peripherally distributed cups, a means for picking up and metering amounts of a plastic material which are supported slidably on said carousel, respectively in line with said cups, and forming a spoon member facing in the direction of rotation of said carousel, said picking up and metering means being adapted to be selectively communicated to suction and blowing pneumatic means, an extruder nozzle for said plastic material which is stationary relatively to said carousel and opens at said pick-up and metering means, there being further provided a means of sequentially driving said pick-up and metering means between a raised position whereat a metered amount of material is picked up by said spoon member and the pick-up and metering means are connected to the suction means to retain the metered amount, and a lowered position whereat said metered amount of plastic material is introduced into said metal cup and the pick-up and metering means are connected to the blowing means to eject the metered amount out of the cup.