Abstract: An adaptable ceiling tile structure and a suspended ceiling system utilizing such ceiling tiles is disclosed. The basic ceiling tiles include a peripheral frame surrounding a single primary opening. A cover layer, such as a fabric or scrim may be stretched across the opening and attached to the frame with a support surface defining the primary plane of the cover layer and an offset portion defining a peripheral recess. The ceiling tile may be customized with premanufactured trim pieces that include end portions configured for insertion into the peripheral recess and an intermediate portion that can be attached to the cover layer. Once the trim piece is in place, a portion of the peripheral frame and the cover layer can be removed, typically by cutting, to complete the customized ceiling tile.

Abstract: Filament stress in a newly spun filament is reduced in that the air friction between the filament and the contiguous air layer is prevented or limited. For this purpose an air current is generated, flowing in the running direction of the yarn at a speed which is the same or approximately the same as the surface speed of the filament. The air current can be guided on to the filament surface through a tube.

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.