Abstract: In a double woven fabric with an upper layer and a lower layer, provision is made that, in the area of a desired predetermined separation line, a thread system with warp threads and weft threads alternates out of the upper layer into the lower layer and a thread system alternates out of the lower into the upper layer. At both sides of the desired predetermined separation line, the threads alternating between the upper layer and the lower layer and vice versa are separated in the lower layer. Created thereby is a flat textile structure with a predetermined separation line invisible from the viewing side of the surface of the double woven fabric.

Abstract: A heat exchanger device for refrigeration driers in compressed-air installations is described. Such heat exchanger devices have an air/air heat exchanger (1) and a refrigerant/air heat exchanger (2). According to the invention, the air/air heat exchanger is produced as a plate heat exchanger and the refrigerant/air heat exchanger is produced as a combined tube/plate heat exchanger. The tube/plate heat exchanger has at least one unit containing a tube coil being coiled in a meandering manner and forming two spaced broad sides, and two plates, each plate being fastened at one of the two broad sides (FIG. 1 ).

Abstract: A double plush weaving operation is conducted to form a two-ply material with pile yarns connecting the two plies together. Each ply comprises an outer woven layer and an inner pile-carrying layer. The two layers are tied together by warp yarns but the pile yarns are tied in only to the pile-carrying layer so that the tying-in points are not visible on the outer visible surface of the woven layer. The connecting pile yarns are cut to form two lengths of double-sided fabric with the plush side having satisfactory pile strength and the woven side having the appearance of a flat weaving machine product.