Abstract: An apparatus for delivering and depositing groups of continuous threads or filaments, which are conveyed by means of a gas flow and which are introduced substantially parallel into a passage having a corresponding cross-section is proposed, the gas flow accompanying the threads upon entering the upper part of the passage is accelerated to high speed and is then decelerated and the threads are deposited on a moving depositing surface. The gas flow delivering the threads flows at high speed through the passage preferably provided with parallel walls and then is decelerated by the suction of part of the gas in the lower passage area laterally through openings in the passage walls.

Abstract: A foil or film of plastic or rubber is extruded and placed upon a cooled drum for the cooling of the film or foil with the aid of an air sheet derived from a nozzle section which extends above the drum transverse to the direction of displacement of the foil or film. The nozzle has flow deflectors which are responsible from the walls to vary the deflectors. The flow deflectors are convex toward one another and have air foil configurations while being designed to deflect respective streams outwardly along the edges of the foil to resist curvature.

Abstract: To simplify the cleaning and maintenance of a meltblowing head, the lips defining with the spinneret the flowing slits adjusting the row of orifices can be swung away from the spinneret on respective lip guides pivotally connected to respective setback bars. The setback bars can be adjusted and locked in place with respect to the blowing housing and the lips can be adjusted and locked in place relative to the lip guides independently of the swinging action.

Abstract: Clogging and prolonged down times are avoided in a pelletizer for paste type materials such as sludge by providing an extruder hopper with at least one, preferably two, lower edge slide gates which can be opened to permit movement of a clogged screen zone out of alignment with the discharge opening of the hopper. The clogging material can be scraped off from the screen portion that is taken out of alignment with the hopper discharge opening. The cutting of the extruded sludge is accomplished by an oscillating lower screen section that slides back and forth below the upper screen section. The upper screen section is provided with two, preferably three zones, two of which are perforated and one of which is unperforated to form a closure for the hopper discharge opening. Screeding non-pelletizable material off the screen surface is accomplished either by a separate screeding device or by operating the slide gate or gates as screeds.

Abstract: The portion of the base fixture of the angle head which overhangs the junctures of the frames and the blades in the frames is made adjustable to slide from its in use position to a position which exposes the junctures, facilitating clearing unwanted material from the junctures. The added part fits and slides in a channel made to provide the needed access and is held in place by a thumb screw in a slot. Loosening the screw allows the part to be moved to provide access and moved back to its in use position and locked in that position by tightening the screw.

Abstract: The sheet metal clip which serves to hold the adjoining ends of the top (horizontal) scraper blades of an angle head in suitable relative positions is replaced by a clip assembly in which the sides of the clip are joined to a filler block to structurally stabilize the clip. The clip assembly is held in place by a threaded fastener.