A mat is provided having a cushion such as a plurality of bristles whose roots are forked. The mat having a cushion is prepared by extruding a melted synthetic resin from a plurality of orifices or a slit in a swinging nozzle onto a surface of a running sheet and adhering the forked roots of the bristles or film on the sheet and cooling it to solidify the same. The extrusion of the melted synthetic resin can be made between two sheets through the swinging nozzle and the bristles laid between the two sheets can be sliced to separate each of the sheets.
An apparatus for producing helically wound double-walled fused thermoplastic pipes, corrugated outside and smooth inside. The apparatus includes extruder means forming two bands of a thermoplastic material, a former shaping the corrugated configuration of and helically winding the first extruded band, a cooled element pressing the second band to the inside of the corrugations and having passages communicating with the second band and with a vacuum means.
Hollow chamber plates of synthetic material are produced from two thermoplastic cover layers, which preferably have been produced immediately beforehand by extrusion, which are brought into contact with a large number of previously produced webs and welded together. By setting the webs into wavy lines running against each other, a high degree of rigidity in the hollow chamber plate is attained. A device for the production of such hollow chamber plates is described.
A cutter for a non-woven carpet machine in the form of a continuous belt or band which is tensioned and moves continuously in one direction against advancing yarn strands. A sharpening mechanism can be provided to sharpen the blade while it is moving and without stopping the carpet making machine by moving the blade against the sharpening mechanism. A cooling unit can be provided for circulating cooling air against the carpet backing layers to harden adhesive in which the yarn is embedded.
A method for forming a strip material useful as part of a fastener. The method steps comprise moving two backing layers from opposite directions around guides and away from the guides in parallel paths, feeding monofilaments between the guides, pressing the monofilaments first into engagement with one and then the other of the backing layers on the guides so that lengths of the filaments extend normally between the backing layers along the parallel paths, severing those normally extending monofilaments halfway between the backing layers, and heating the newly severed terminal ends of the monofilaments to form heads.
