Abstract: A web of fibers (4) is conveyed by conveyor belts (2, 5) which pass around rollers (32 to 43, 60 to 69). Some of these rollers are carried by main carriages (10, 14) which are capable of displacement in reciprocating motion above an apron (8) which moves in a direction parallel to the axes of the rollers and collects the web (4) in the form of a lap. Auxiliary carriages (16, 18) are provided for maintaining the length of the paths of the conveyor-belts (2, 5) at a constant value in spite of the reciprocating movements of the main carriages (10, 14). Each main carriage (10, 14) is connected to an auxiliary carriage by coupling means (92, 96) which are less extensible than the conveyor-belts (2, 5) and are so arranged as to be put under tension under the action of the means (84, 88) for driving the carriages.The invention is applicable to the manufacture of nonwoven fabrics.

Abstract: It is desired to detect and to compensate position errors occurring during the manufacture of a web consisting of a multilayer non-woven fabric by means of a laying machine, in which a web consisting of a monolayer non-woven fabric is supplied to a conveyor belt transversely to the direction of travel of said belt and is laid onto said belt by a reciprocating motion to form a multilayer web. For that purpose, the measured value signal is analyzed by machine, preferably by a Fourier transformations for errors consisting of periodically occurring fluctuations of the signal amplitude and the velocity of the conveyor belt and/or the velocity at which the monolayer non-woven web is supplied and/or the width in which the monolayer non-woven web is supplied and/or the width in which the non-woven web is laid onto the delivering belt are automatically controlled to minimize the periodic fluctuations of the signal amplitude.

Abstract: A web of fibers (4) is conveyed by conveyor-belts (2, 5) which pass around rollers. A number of rollers are carried by an input carriage (10) and an output carriage (14), said carriages being capable of displacement in reciprocating motion above an apron (8) which moves in a direction parallel to the axes of the rollers and collects the web (4) in the form of a lap (6). A guide roller (34) defines for the web (4) on a first conveyor-belt (2) a section (22) which is inclined towards the pinching line and is located upstream of said line, said pinching line being defined by two adjacent rollers (35, 61). The pinching roller (35) associated with the first conveyor-belt (2) causes it to make a turn through an angle (B) within the range of 90 degrees to 180 degrees. The pinching line is located in an intermediate angular position between the beginning and the end of said turn.The invention is applicable to the manufacture of nonwoven fabrics.

Abstract: A web of fibers (4) is conveyed by conveyor-belts (2, 5) which pass around rollers (32 to 43, 60 to 69). Some of these rollers are carried by main carriages (10, 14) which are capable of displacement in reciprocating motion above an apron (8) which moves in a direction parallel to the axes of the rollers and collects the web (4) in the form of a lap. Auxiliary carriages (16, 18) are provided for maintaining the length of the paths of the conveyor-belts (2, 5) at a constant value in spite of the reciprocating movements of the main carriages (10, 14). Each auxiliary carriage (16, 18) is located within a bottom passageway (70) which extends beneath the apron (8) and is separated from the apron by at least one partition-wall (72).The invention is applicable to the manufacture of nonwoven fabrics.

Abstract: A method and a plant for making laps (FA) starting from card webs (V), particularly for making laps for felts, such as felts for paper machines, or the like. By using most of the existing machinery, the laps (FA) of any desired width dimension however greater than that of card webs (V) are simply made, with the lap fibers being substantially arranged in the longitudinal direction (D) of laps (FA). According to the invention, an intermediate ribbon lap (N) is formed from a card web (V) delivered from card (C), by causing the card web (V) to be folded in the card web longitudinal direction (A) by a first lap-laying apparatus (F1), and laid at the same time on an associated first conveyor (T1), the fibers in the intermediate ribbon lap (N) being arranged substantially in the transverse direction of the intermediate ribbon lap (N).

Abstract: Non-woven fabrics are manufactured using a carding machine with outlet comb, a blamire feed or spreader/batt-making machine with cylinders for depositing a web of fibers, and one or more needling devices. The surface weight of the web delivered by the carding machine to the blamire feed is modified by varying the speed of the comb as a function of the changing positions of the cylinders whereby a batt of variable surface weight over its width is obtained so as to counteract the distortions of surface weight distribution produced by the needling devices.

Abstract: In a method for feeding out the primary web of a mineral wool web by means of a pendulum conveyor and to an arrangement of such a pendulum conveyor, an output is fed as close to the receiving conveyor as possible for the primary web to be rapidly fixed onto the underlying web. The conducting rollers at the output end, which rotate in the output direction, have a disturbing effect on such a close output. The front conducting roller in the direction of motion rotates in a direction having a lifting effect on the underlying web, which is negative, whereas the rear conducting roller rotates in a direction pressing down the web being fed out, which is advantageous for the output. Both conveyors of the pendulum conveyor are made vertically movable with regard to each other, the front conducting roller being situated higher and the rear conducting roller lower during the pendulum swing. The reversing mainly takes place in the end position of the pendulum swing.

Abstract: A crosslapper is disclosed utilizing at least one foraminous transporting belt to permit rapid escape of entrained air during fast operation of wide-bed machinery.

Abstract: A method and an apparatus for avoiding periodic non-uniformities in papermaking felts by varying the width of the web going into a cross lapper.

Abstract: Apparatus for the manufacture of a nonwoven fabric or the like whose width exceeds the working width of a carder or the like equipped with a plurality of take-down devices, deflection arrangement connecting thereto, and with a pile transport table, characterized by a stationary bottom table arranged between the respective take-down device and the respective deflection device, this bottom table extending over the full width of the nonwoven fabric supplied from the respective take-down device and a conveyor belt which moves in take-down direction of the take-down device and which extends over the full width of the nonwoven fabric supplied by the respective take-down device being arranged above said bottom table at such a distance therefrom that its lower belt portion is in contact with the upperside of the nonwoven fabric lying on the bottom table and conveys this nonwoven fabric from the take-down device to the deflection device; and in that the contact surfaces of the bottom table on the one hand and of the c

Abstract: A non-woven fabric is produced by the transportation of a fiber flow at an angle which is less than 90.degree. to the transport direction of the non-woven fabric to be manufactured, with the feed rate of the fiber flow being controlled, the fibers which are to form a fiber layer being placed next to one another, and with the formed fiber layer being simultaneously, and in the lateral border areas of the fiber layers, being consecutively, combined with the preceding fiber layer, reinforcing the produced non-woven fabric. The angle of the fiber flow to the transport direction of the non-woven fabric to be manufactured is set between 0.degree. and 89.degree.. The controlling of the fiber flow comprises monitoring of the quantity feed rate and/or dissociation of the fiber flow and/or fiber mixing, immediately prior to the formation of a fiber layer.

Abstract: Apparatus for producing a web whose width exceeds the working width of a machine having a number of take-off units and a table for conveying the web, for the production of webs from fibrous material, more particularly cards, carding machines, or pneumatic non-woven formers, the device having deflectors (12) which are associated one each with the take-off units (10) and which, as considered in the operative direction of the machine, are spaced apart from one another by a distance corresponding to the width of the taken-off web, the deflectors (12) extending at an angle to the operative direction of the machine, such angle corresponding to half the angle between the operative direction of the take-off table (10) and that of the table (14) for conveying the textile, and a corresponding method.

Abstract: Fleece layering apparatus for forming a fibrous fabric web consisting of several layers of fleece with delivery means layering the infed fleece in a zig-zag manner, with which the infed fleece is moved by air-permeable delivery means against the surface of which the web of fleece is pressed by a controlled and regulated air flow, and with an upper fixed air-permeable delivery belt and a lower fixed air-permeable delivery belt vertically spaced beneath the upper one and parallel to it, between which a preferably air-permeable fleece transferring roll is provided which can move backwards and forwards between two end positions, and beneath the lower delivery belt, a fleece doffing and cuttling device is provided which can move backwards and forwards between two end positions.

Abstract: An apparatus for stacking a tape of indefinite length in folded condition by shaking the tape off into an accumulation box. When the height of the tape stacked goes above the top of the accumulation box, the top of the tape stack is pressed down to increase the compactness of the tape stack resulting in increase in the amount of tape stacked in the accumulation box.

Abstract: A process for feeding defibrators with sheet pulp delivered in batches. Rectangular sheets are deposited one behind another on a feed belt with their longitudinal axis offset by 45.degree. with respect to the direction of advance of the belt, whereupon two equal lateral parts from each sheet are folded back along two folding lines parallel to the direction of advance of the belt, the distance e between said lines being equal to l/.sqroot.2 and two consecutive sheets being mutually apart by x=L/.sqroot.2, L and l, respectively, being the length and the width of the pulp sheet. Feeding a machine for diapers.

Abstract: A device is disclosed for laying fiber fleeces or the like delivered from a carding machine of the like onto a withdrawal belt driven at a predetermined speed. The device comprises a feed belt driven at a predetermined speed, storage, layer and balance cars all arranged for oscillating movements, respectively, a first continuous conveyor belt extending about rollers on the storage and layer cars and a second continuous conveyor belt extending about rollers on the storage and layer cars and extending from the storage car to a roller on the balance car. One run of each of the conveyor belts extending between the storage and layer cars confront each other for receiving the fiber fleece therebetween. Common drive means connects the storage and layer cars and further drive means extends from the feed belt to the layer car.

Abstract: A high speed cross-lapping apparatus is disclosed which forms batting from a high total denier tow of continuous filament material such as polyester. The apparatus includes a reciprocating carriage having a pair of steel rolls which deliver the tow to an underlying receiving conveyor. To drive the carriage, either a unidirectionally driven belt or a reversible electric motor may be provided. Inertia reversal apparatus including a pneumatic cylinder is located at each end of the carriage stroke. To accomodate differences in tow length as the carriage reciprocates, a horizontally disposed length compensating assembly is employed.

Abstract: A device is disclosed for laying fiber fleeces or the like delivered from a carding machine of the like onto a withdrawal belt driven at a predetermined speed. The device comprises a feed belt driven at a predetermined speed, storage, layer and balance cars all arranged for oscillating movements, respectively, a first continuous conveyor belt extending about rollers on the storage and layer cars and a second continuous conveyor belt extending about rollers on the storage and layer cars and extending from the storage car to a roller on the balance car. One run of each of the conveyor belts extending between the storage and layer cars confront each other for receiving the fiber fleece therebetween. Common drive means connects the storage and layer cars and further drive means extends from the feed belt to the layer car.

Abstract: An improved method for producing and processing deregistered and disorientated synthetic tow for forming fiber filled articles in which crimped registered tow is deregistered through pairs of rolls utilizing a non-continuous groove-threaded surface. The synthetic tow is dispersed and spread, and collected for continuous distribution into and envelopment by article surface material. The automatic process and apparatus associated therewith additionally form and finish the fiber filled articles themselves for additional fabrication processes or for use as is. Vacuum suction and reciprocating distribution of the open tow web may be varied as desired to arrive at particular article thicknesses directed towards particular article uses.

Abstract: A batt is produced by cross lapping a web onto a conveyor moving laterally to the direction of web laydown to form partially overlapping folds. The length of the cross lapping motion is varied in a programmed cycle to produce a modified basis weight profile in cross sections of the batt. The conveyor speed is adjusted to provide a uniform basis weight profile along any section taken lengthwise of the batt. The process is useful for improving batt lengthwise uniformity while providing different basis weights at different distances from the sides of a batt.

Abstract: An apparatus for laying an elongate strip in substantially uniform layers and side-by-side rows includes a conveyer assembly for receiving a generally horizontally traveling material and for delivering the same to the upper end of a hollow, generally vertically extending, universally pivotable feed chute. The lower end of the feed chute is coupled to a first slider which is mounted for reciprocal sliding movement in a first horizontal direction on a second slider mounted in turn on the main frame for reciprocal sliding movement in a second horizontal direction normal to the first. A drive assembly reciprocates the first slider at a first rate of speed and simultaneously reciprocates the second slider in the second direction and at a slower speed rate for delivering the material in the desired pattern from the lower end of the feed chute. A speed matching assembly adjusts the speed of the strip laying apparatus to that of the strip received from other process machinery.

Abstract: A multi-layer web or strip is produced from a single strip, by folding this single strip on itself, forming alternate loops in zig-zag form, the second portion of a loop partially covering the first portion of the same loop and being covered in the same proportion by the first portion of the following contiguous loop. The present invention is applicable to the continuous manufacture of multi-layer sheets for cleaning, hygiene or mechanical purposes.

Abstract: In a web layering device composed of a series of conveyors disposed in sequence for conveying a web of textile fibers from a card and depositing the web in layered form on a transporting unit, at least some of the conveyors being mounted on carriages to undergo back and forth movement, the attainable web conveying speed is increased by disposing an air guidance member in the form of a plate at at least one region of transfer between two conveyors to create an air stream which travels substantially tangentially to the web travel path.

Abstract: A process of producing slivers for open-end spinning of wool or synthetic yarn and being characterized by eliminating the necessity for repeated doublings and draftings of the sliver while providing the desired uniform fiber distribution and weight in the sliver and yarn. Stock material is carded, then cross-lapped to reorient the fiber distribution, and again carded for producing a fiber web. This web is divided into relatively narrow rovings or strips of fibers and oriented into groups containing alternate strips of fibers from across the width of the fiber web. The respective strips of fibers from each such group are combined and formed into a sliver.