Abstract:
A water-permeable drum assembly for the hydrodynamic needling of textile materials in order to reinforce and structure the textile materials or refine the surface thereof has an intrinsically stable sieve drum provided with apertures and an outer tubular sieve-type cloth made of intersecting wires and pulled across and fixed to an outer surface of the drum. The outer sieve-type cloth has a coating that stabilizes intersections of the wires.
Abstract:
Production of a non-woven tissue from wood pulp on a wet strip is known. The above has a cardboardy, paper-like feel to it. In order to achieve a web with sufficient resilience, the desired wood pulp fibres used to advantage in the hygiene industry for absorbing liquids are thus always mixed with chemical fibres as support fibres. According to the invention, a consolidated tissue with a soft feel and high fluid absorption is obtained by means of needling a non-woven pure wood pulp tissue with water.
Abstract:
The nozzle beam on a device for producing liquid jets in order to impinge said jets upon the fibres of a web of continuous material guided along the beam consists of a beam housing extending along the working width of the continuous web of fibre material, whereby two longitudinal bores placed on top of each other are accommodated in said housing and are separated from each other by means of an intermediate wall provided with continuous boreholes. The nozzle strip required to produce the liquid jets is mounted in a liquid-tight manner in the lower part of the housing and is cross-flown by pressurized water. In order to enable more needle water to reach the fabric than is usual with such a construction, two strips of nozzles are mounted in a housing and must be provided accordingly with pressurized water. This construction also makes it possible to arrange a larger number of nozzle strips and therefore nozzle jets on a drum, which is advantageous with respect to the various needling effects obtained with a nozzle beam.
Abstract:
The invention relates to a previously known water-permeable drum for hydrodynamically needling webs of textile materials such as nonwovens, tissue, cloth, knitted fabrics, or similar in order to reinforce and structure said textile materials and/or refine the surface thereof. Said intrinsically stable drum is provided with apertures and a tubular sieve-type cloth or knitted fabric which is made of metal wires, is pulled across the outer circumference thereof, and is fixed to the face of the drum. In order to prevent creases from forming across the area of the sieve-type cloth when the drum is used according to the specifications, the sieve-type cloth or knitted fabric is provided with a coating that stabilizes the intersections of the wires. Said coating should be a galvanically applied coating, e.g. a nickel plating.
Abstract:
In paint application devices that work on the pouring principle, it is known to collect the liquid flowing over a spillover weir in an upstream liquid reservoir. The liquid then flows over the spillover weir and over the guide surface extending downstream therefrom. When large application quantities of 50 l/m/min and more are involved, there is a risk that the liquid film may become separated from the guide surface in the area of the spillover weir. It is intended to coat this spillover weir over the entire working width thereof by using a height-adjustable diverter block with a downwardly protruding lip to regulate the volume of liquid that flows down onto the guide surface.
Abstract:
The invention concerns a method for producing three-dimensional colourless designs in a non-woven fabric or like material entirely bonded. Said method consists in subjecting the fibers to a blowing process through openings which form the design, then in optionally bonding them in the openings, since the fibers in the openings are only displaced therein with limited depth, and are subsequently needle bonded against a supplementary support.
Abstract:
The suction slit between two sliding strips for a transport device transporting the textile material is filled by a cleaning strip which has holes on one side to carry away the fluid to be drawn off and preferably on the other side as well, on the top of a separating strip, to determine the width of the suction slit. In this fashion, the fibers loosened by needling come to rest on the ribs of the holes in the cleaning strip and not on the ribs on the openings in the suction tube and thus can be removed quickly from the suction device by replacing the cleaning strip. In addition, the width of the effective suction slit can be changed quickly by replacing it by another cleaning strip in which the width of one or two separating strips is dimensioned accordingly.
Abstract:
Each screen drum design has, in front of the rotating screen drum which transports the web, a stationary screen cover whose purpose is retention of the dry air coming from the fan, uniform throughput of the air through the screen cover, and a uniform drying process over the width of the web. The screen cover has a perforation whose permeability is adapted to the degree of drying. At the beginning of the drying process, when the web is not yet very permeably, the screen cover is to be perforated provided a smaller free air throughput surface and, as the degree of dryness increases, a larger free air throughput surface by making the holes larger in diameter or provided a larger number of holes per unit surface.
Abstract:
A screen drum design is known whose drum jacket consists of sheet metal strips running axially and whose width extends in the radial direction. These sheet metal strips must be permanently connected with the endwise bottoms to produce the drum jacket. According to the invention, this connection is made movable. For this purpose, an articulated ring (32) is used that consists of a number of connecting arms (13) mounted pivotably, said arms being connected with articulation at their free ends either with sheet metal strip structure (13, 14) or with bottoms (11, 12) that are located at a distance from the ends of sheet metal strips (13). In this way, movement is always possible between the drum jacket and bottoms (11, 12) to compensate for dimensional changes as a result of temperature fluctuations.
Abstract:
The permeable drum for needling tissues, nonwovens, or other permeable materials of a certain width consists of a normally perforated sheet metal drum on which strips that are thin and extend axially over the length of the drum are arranged with small distances between them around the drum. The strips radially support a very thin sheet metal jacket with microfine perforations and produce a uniform flow of liquid through the material that rests externally against the sheet metal jacket. The strips can be joined together for example to form a honeycomb profile and thus uniformly transfer the hydrodynamic load developed during needling to the screen drum.