Abstract: A process and apparatus for producing BCF yarns, in which a plurality of strand-like filaments are extruded, cooled, and combined into several yarns. The filaments are extruded in the form of a downwardly advancing annular filament sheet, and the filaments in the sheet are cooled by directing a cool air flow radially through the annular sheet. The sheet is divided into segments and the filaments of each segment are gathered to form a multifilament yarn, and each yarn can then be drawn and bulked, and finally wound into a package.

Abstract: A method and an apparatus for melt spinning and cooling a group of filaments, wherein the group of filaments is extruded through a plurality of spin holes of an annular spinneret to form an annular filament sheet. The group of filaments is then cooled by an inner airflow, which is generated by an air diffuser in the interior of the filament sheet. To obtain in the case of a particularly high filament density of the filament sheet a particularly uniform cooling of the inner and outer filaments of the filament group, the group of filaments is additionally cooled by a second outer cooling airflow which is generated by an additional air discharge member on the outer side of the filament sheet.

Abstract: A device for crimping synthetic bundles or slivers of yarns, the device has a stuffing box provided with an inlet for a yarn bundle or sliver and including a movable press plate and a stationary counter plate opposite to the press plate, two axially parallel rollers disposed at the inlet for the yarn bundle or sliver and forming a gap through which the yarn bundle or sliver enters the stuffing box, a pivot arm pivotally mounted on a stationary pivot bearing, one of the two axially parallel rollers being rotatably mounted at a fixed position in a machine frame, another of the two axially parallel rollers being seated on the pivot arm so as to be rotatable about a rotation axis thereof and the press plate being pivotally connected to the pivot arm by means of a rocker so as to be pivotable about the rotation axis of the roller seated on the pivot arm or another rotation axis parallel with the rotation axis of the roller seated on the pivot arm, whereby the gap between the rollers is varied, a contact pressure d