Abstract: The invention relates to a method for recycling plastic materials which contain at least two polymers, copolymers or blends thereof based on polystyrene. The plastic material is thereby mixed with a solvent for the polymers, copolymers or blends. Subsequently a precipitation is effected by addition of a corresponding precipitant so that then the gelatinous precipitation product can be separated from the further components of the plastic material. The method is used for recycling of any plastic materials, in particular of plastic materials from electronic scrap processing and from shredder light fractions.

Abstract: The invention relates to a method for recycling polyesters or polyester mixtures from polyester-containing waste, in which the polyester or the polyester mixture is dissolved in a solvent and subsequently free-flowing particles are precipitated herefrom with a precipitant. The precipitant is thereby chosen such that subsequent separation of precipitant and solvent is made possible in a simple manner.

Abstract: The invention relates to a method for recycling plastic materials which contain at least two polymers, copolymers or blends thereof based on polystyrene. The plastic material is thereby mixed with a solvent for the polymers, copolymers or blends. Subsequently a precipitation is effected by addition of a corresponding precipitant so that then the gelatinous precipitation product can be separated from the further components of the plastic material. The method is used for recycling of any plastic materials, in particular of plastic materials from electronic scrap processing and from shredder light fractions.

Abstract: The invention relates to a method for recycling polyesters or polyester mixtures from polyester-containing waste, in which the polyester or the polyester mixture is dissolved in a solvent and subsequently free-flowing particles are precipitated herefrom with a precipitant. The precipitant is thereby chosen such that subsequent separation of precipitant and solvent is made possible in a simple manner.

Abstract: Apparatus for transversely sealing a wrapping tube includes opposed sealing tools movable in unison linearly along an operating path having a beginning and an end while sealing a wrapping tube. The tools return from the end of the operating path to the beginning thereof by moving along arcuate return paths. Crank mechanisms for so moving the tools include cam tracks and cooperating cam followers. The cam followers are urged against the cam tracks under the influence of centrifugal force during movement of the tools along the return paths.

Abstract: Device for welding and parting thermoplastic foils to form bags or the like, having a pair of heated opposing tools arranged to close against foils introduced between them. The foils are welded and parted along a compression line formed between a compression edge of one tool and a hard, wear-resistant, but resilient surface of the opposing tool.