Abstract: Apparatus for processing synthetic thermoplastic material, such as sheeting, hollow bodies, and splinters, comprises an upright receiving container, which is adapted to be charged from above, and at least one disintegrating and blending member, which is set with knives and is mounted on the container near its bottom and rotates about the axis of the container. The receiving container has in its side wall an opening which is disposed on the level of the disintegrating and blending member and leads to a screw extruder, which is tangential to the receiving container and directly connected thereto.

Abstract: An upright container having an open top end contains a rotor disc, which is mounted for rotation on a vertical axis and spaced below said open top end and has a periphery which extends close to the inside surface of said container. A plurality of cutting teeth are mounted on said disc and disposed at its periphery. At least two radial ribs are mounted on the top of said disc.

Abstract: A scraper flight conveyor for preheating thermoplastic bulk material and feeding it to a screw extruder comprises a succession of controllably heated slideways arranged in superposed series, a plurality of scraper flights in sliding contact with each slideway and spaced along a path of travel over the surface thereof, and a drive operable to move the scraper flights on each slideway along the path of travel. The scraper flights push discrete portions of the thermoplastic bulk material along the path of travel. The delivery rate of the material to the slideways is controlled.