Abstract: In a melt spinning apparatus, cooling system with a blower nozzle with slit-shaped outlet openings is used which is directed upon the yarns emerging from the spinning nozzle. The blower nozzle is provided with a bend immediately before its outlet opening through which the air stream is directed to the output of the yarns from the spinning nozzles. The bend is designed so that a rapid and effective cooling of all the extruded filaments takes place, even with a nozzle package with a large number of perforations, without having to provide several blower nozzles. A narrowing at a given distance before the outlet opening ensures even distribution of the flow profile produced over the entire outlet cross-section of the blower nozzle. Furthermore, the spinning nozzles are assigned an induction heating system in which induction coils are placed above the area over which the spinning nozzles extend.

Abstract: In a melt spinning apparatus, cooling system with a blower nozzle with slit-shaped outlet openings is used which is directed upon the yarns emerging from the spinning nozzle. The blower nozzle is provided with a bend immediately before its outlet opening through which the air stream is directed to the output of the yarns from the spinning nozzles. The bend is designed so that a rapid and effective cooling of all the extruded filaments takes place, even with a nozzle package with a large number of perforations, without having to provide several blower nozzles. A narrowing at a given distance before the outlet opening ensures even distribution of the flow profile produced over the entire outlet cross-section of the blower nozzle. Furthermore, the spinning nozzles are assigned an induction heating system in which induction coils are placed above the area over which the spinning nozzles extend.

Abstract: In an arrangement for spinning endless threads of synthetic filaments an apparatus is provided normally comprising a winder as well as a unit comprising a roll arrangement. Owing to the application of rolls of extended length the design height level of the apparatus above the winder can be reduced substantially.

Abstract: For the cooling of melt-extruded filaments of fiber-forming polymers spun from nozzle in molten form, said filaments are exposed to a medium prepared in foam form. The filaments emerging from the spinning nozzle are taken to the cooling area through said foam before passing on to a further process. The cooling medium, consisting of a liquid, is prepared by the addition of a gas.

Abstract: A nozzle package is connected at its lower end to a heating box by means of elements which permit a good heat transfer to the nozzle plate included in the nozzle package.

Abstract: The heat transmission from the heating box of a spinning beam to the nozzle package carried therein in a nozzle throat is improved in such a way that the fixing device for the package is provided with heat receiving elements. These elements are subjected to saturated vapor in operation and are provided with condensation surfaces so as to receive heat from the saturated vapor. The heat received is transmitted to the package via at least one heat bridge.

Abstract: A plurality of separate synthetic plastic fibers are advanced through respective discrete guide passages of a housing towards a crimping chamber. The housing is provided with bores for supplying a stream of hot gas into each of the passages to thereby plasticize the fibers. Thereafter, the fibers pass into the crimping chamber, where the gas entering this chamber is withdrawn, so as to crimp the fibers. The housing is provided with another passage, which connects the opposite end of the crimping chamber with the exterior of the housing. This passage receives the fibers in crimped condition and allows them to be wound onto takeup spools individually.