Abstract: Needling machine intended to consolidate, by needling, a web of fibres, in particular a sheet of non-woven fabric, comprising a series of needle-field boards, each board having at least one respective needle field projecting from one face, called the needle face, of the board, means for making the web of fibres move in front of the needles of the boards of the series of boards and means for moving the needles back and forth in a direction transverse to the movement of the web, such that they pass through the web of fibres passing in front of them in one direction and then the other, the series of needle-field boards comprising at least a first board comprising a first needle field and a second board comprising a second needle field, the first needle field being arranged on the needle face of the first board according to a first needle face pattern and the second needle field being arranged on the needle face of the second board according to a second needle face pattern, characterised in that the first needle

Abstract: Device for transferring and/or introducing a fibre web, in particular a nonwoven web, into a consolidation installation, in particular one that is mechanical or hydraulic, for example a needle loom, comprising at least one transfer element comprising at least one roller (12), at least one saber (16) and an endless belt (13) extending between an upstream end and a downstream end so as to wrap around the roller at the upstream end and the saber at the downstream end, the at least one roller being arranged so as to drive the endless belt in rotation, and the at least one saber giving the downstream end of the belt the shape of a corner or lip, the at least one endless belt (13) being modular and consisting of links in the form of transverse strips that are articulated to one another, characterised in that the endless belt (13) consists of a plurality of sub-belts extending parallel to one another.

Abstract: Apparatus for forming a fibre mat, in particular a non-woven mat, comprising a fibre web-forming device, for example a card, a cross-tapper and a device for drafting the fibre web(s) disposed between the web forming device and the cross-lapper in order to draft the fibre web(s), in particular in a time-varying, specifically periodic manner, to thereby adjust a predetermined desired profile of the fibre mat leaving the cross-lapper, the web-forming device comprising at least one output belt (1, 2) for at least one web (5, 6), and preferably two output belts (1, 2) for two webs (5, 6), an upper and lower web respectively; wherein the cross-hipper has an input belt (7) for receiving the web(s) from the output belt(s) of the web forming device, characterised in that the arrangement is such that the path of the web, or of the at least one web, and preferably of the two, upper and lower, webs, between the output belt(s) of the web-forming device, in particular the card, and the input belt of the cross-lapper includ

Abstract: A needling device to consolidate a fleece. The device including at least one needle plate with an array of needles; at least one column with its longitudinal axis rigidly connected to the at least one needle plate; drive systems; a sealed housing; and at least one guide pot. The drive systems are configured to impart to the at least one column a to and fro motion so that the needles follow an elliptical path to pass through, in one direction then the other, the fleece that passes in front of it in the machine drive direction to consolidate it. The sealed housing containing part of the column and drive systems and wherein the at least one guide pot is fitted in an opening in the sealed housing and oscillates in relation to an axis of oscillation perpendicular to the longitudinal axis and the machine drive direction.

Abstract: A needling machine to consolidate a fleece. The machine includes one or more needle plates having an array of needles; one or more columns coupled to the needle plates; and driving means configured to impart an elliptical to and fro motion to each needle plate so that the needles pass first in one direction, then the other, over the fleece passing before it in the machine. The machine further comprising a sealed housing enclosing part of each column and driving means; and one or more guide pots within the sealed housing. Each driving means including a longitudinal driving means imparting to each column a straight to and fro motion. Each needle plate oscillates in relation to each respective column. The driving means further comprise transverse driving means imparting to a point on each needle plate a to and fro motion essentially parallel to the machine direction.

Abstract: Needle machine comprising at least one needle plate, from which projects an array of needles, means for imparting an elliptical, reciprocating motion to the needles and at least one support table drilled with an array of through holes, or which it is intended to pass in a direction MD, being supported on it, a fabric or web of fibres to be consolidated by needling, the each executing an elliptical, reciprocating motion in the respective through holes, each having an upper respective opening on the fabric support side, a lower respective opening on the opposite side and an inner sidewall extending between the two upper and lower openings, characterised in that each hole is machined so that there is a longitudinal section with a greater dimension MD in which the upper respective opening of the hole has a greater dimension in the direction MD and, in this longitudinal section of greater dimension MD, the inner sidewall of the hole is defined, at least in its upper region, by two left and right lines inclined to

Abstract: An installation for consolidating a batt of fibers, for example a nonwoven web, includes a mechanical consolidation workstation using needlepunching from which the fiber batt emerges in a machine or MD direction. A device is provided downstream of the consolidation workstation for stretching in the cross or CD direction which is transverse, in particular perpendicular, to the machine direction, and parallel to the plane of the batt, particularly before it is wound onto a reel. A consolidated nonwoven that can be obtained by the installation is also provided.

Abstract: A crosslapper receives a card web and folds it into a lap intended to be needle-punched or consolidated by other ways. The web includes zones which are more condensed, having a spectrum of orientation of fibers with a component parallel to the width of the web, alternating with less condensed zones having a longitudinal unidirectional spectrum of orientations. The zones which are less condensed are used to form the edge zones of the lap. The result is that the lap has different respective spectra of orientation which pre-compensate for the unwanted changes produced by the needle-punching or other consolidation which follows. A needle-punched lap is obtained having a uniform MD/CD ratio (relationship between longitudinal and respectively transverse tensile strengths) or having a sought profile of the MD/CD ratio across the width of the lap.

Abstract: A crosslapper receives a card web and folds it into a lap intended to be needle-punched or consolidated by other means. The web comprises zones which are more condensed, having a spectrum of orientation of fibres with a component parallel to the width of the web, alternating with less condensed zones having a longitudinal unidirectional spectrum of orientations. The zones which are less condensed are used to form the edge zones of the lap. The result is that the lap has different respective spectra of orientation which pre-compensate for the unwanted changes produced by the needle-punching or other consolidation which follows. A needle-punched lap is obtained having a uniform MD/CD ratio (relationship between longitudinal and respectively transverse tensile strengths) or having a sought profile of the MD/CD ratio across the width of the lap.

Abstract: The installation includes two needling apparatuses (2, 3) which succeed each other on one side of the path (1) for the fleece to be needled. The needles (47) have an “elliptical” movement, i.e. their reciprocating movement of penetration is combined with a reciprocating movement parallel to the direction of progression. The two mechanisms are actuated at the same speed but with a phase shift of 180° between them. The installation is used for balancing horizontal vibrations.

Abstract: Needles (47) periodically penetrate into a needling path (1) between a stripper plate (26) and a needling table (24). In the process, the needles describe an elliptical movement by means of which they accompany the textile when they are in penetration phase. The elliptical movement is generated by oscillating-sliding of a rod (38) in a rotating guide (39). The rod (38) is actuated by two crank connecting-rod systems (51a, 51b), the adjustable phase shifting of which defines the horizontal amplitude of the movement of the needles. Use for simplifying elliptical guiding means, reducing plays and air turbulences.

Abstract: A needling loom comprising needles actuated in reciprocating motion between a retracted position and a maximum penetration position through a stripping plate, a textile web to be consolidated, and a needling loom table. The stripping plate and the needling loom table bear rails and elements for rapid assembling and disassembling for either pressing the rails against fixed crosspieces for the needling loom to operate, or for releasing the pressure and cause the rails to rest on rollers for extracting and inserting the stripping plate and the table by simple transverse sliding in the passage direction of the web. The invention is useful for reducing the time for assembling and disassembling machine components such as the stripping plate and a needling loom table for maintenance operations, in particular cleaning operations.

Abstract: A distributor layer moving in a reciprocating motion to deposit a web coming from a card, on an output apron to form thereon a lap designed for subsequent mechanical bonding. A front conveyor belt transporting the web up to a folding carriage and a rear conveyor belt for supporting the other surface of the web up to a depositor carriage are driven so as to have identical moving speeds in a pinching zone. In the folding carriage the web is deviated by less than 90 degrees to move in a down slope along a section, then a turning of more than 90 degrees, is first exposed, then is externally supported by a support structure. The pinching zone slopes slightly downwards. The web is likewise exposed for the turning in the folding carriage then with external support by an arrangement in a second angular surface.

Abstract: An installation includes a carding machine (1), and a distributor-layer (2) depositing the card (1) web (6) in a reciprocating motion on a delivery belt (8) moving transversely. The resulting intermediate lap (16) is conveyed to a needling loom (3) to produce a consolidated lap (24). A measuring station (28) scans the consolidated lap (24) profile and transmits it to a processing unit (32) where the profile is compared to a set reference input by a terminal (33). The variations in width cause a corresponding modification in the width deposited by the distributor-layer (2) by a link (36). The local surface weight variations cause a corresponding modification of the controls applied to the carding machine (1) capable of longitudinally profiling the web (6). The invention is useful for controlling an installation for obtaining a finished product.

Abstract: A carding machine or other web production device [(1)] supplies a crosslapper [(2)] with two elementary webs [(15a, 15b)] constituting a lappable web [(16)] which is deposited in a reciprocating manner on a transverse output belt [(26)]. In the device [(1) means of] adjustment of the speed of rotation of doffers [(13a, 13b)], of condensers [(17, 18)], of detachers [(19a, 19b)], of the drum [(4)] and/or of the feeder [(7)], and/or [means of] adjustment of the drum-doffer spacing affect the weight per unit area of the elementary web produced taking account of the weight per unit area desired at each point in the width of the fleece [(67)] to be formed on the output belt [(26)]. There is determined the delay length exhibited by each elementary web cross-section undergoing the adjustment of weight with respect to the section of lappable web in the process of being deposited.

Abstract: The invention concerns a stretcher comprising a carriage (21) subjected to a back-and-forward motion (2) for depositing in successive segments (2a . . . 2d) a web of fibres (2) on an outgoing conveyor (6) moving along a direction (9). In order to produce ranges of different plies in the transverse profile of the lap (4) formed on the outgoing conveyor (6) by the web deposited in mutually overlapping segments, the points of inversion of direction (21) in the backward and forward motion of the carriage are different. As a result the successive folds (2ab, 2cd; 2bc, 2da) of the same direction are differently positioned, and the number of web plies in the lap is not the same over the whole width of the lap. The invention is useful for streamlining the lap freely and accurately.

Abstract: A needling machine for the fabrication of non woven products includes apparatus for needling a lap passing between two perforated steel plates, and introducing mechanism for introducing the fiber lap between the two plates, an extractor for extracting the lap downstream of the needling apparatus, a drive source for driving the needling apparatus with a periodical-striking motion, and a processing and control device connected to the needling drive source. The needling machine further includes an electromechanical speed control for driving at a variable speed the extractor, controlled by the processing and control device to provide the extraction means with an extraction speed modulated to the striking frequency at about an average extraction speed.

Abstract: The needling machine includes a support and a stripper defining a path for a lap. A needle board supported by sliding rods has a reciprocating motion between the represented maximum penetration position and the withdrawal position by means of two rod-eccentric devices, each having a rod hinged to the sliding rod. Each pair of rods is hinged to a crankshaft supported by bearings and carrying an equilibration device. The bearings are supported in a crankcase by partitions in a position situated axially between the eccentrics and the equilibration device. The crankshaft extends from the crankcase through simple sealing liners. An advantage of the present needling machine is that the crankcase is stiffened and crankshaft deformations are reduced to increase the striking rate.

Abstract: A needle loom including a support and a stripper defining a path for a fiber lap. A needle board supported by sliding shanks moves back and forth between a maximum penetration position and a retracted position, by means of a connecting rod/crank assembly including a connecting rod hingedly connected to the sliding shank. The shank is guided by slide bearings secured to a mounting which is angularly adjustable about the shank axis so that the axis of ovality can be moved periodically relative to the main direction in which lateral stress is exerted on the bearings as a result of the angular displacement of the connecting rod. The service life of the bearings may thus be extended, while reducing maintenance requirements.

Abstract: An apparatus is provided for accurately guiding and treating textile strips of great width using a quasi-continuous roll which does not bend. The roll is used for guiding material presented in strip form, in particular a textile material which is in contact with a peripheral portion of the roll. The roll is sub-divided into tubular segments attached to one another by flanges supported by an inner ring of a ball bearing. An outer ring of the ball bearing is fixed in a collar integral with a support. In an angular region other than the one which is in contact with the material, the support, made from thin and flat sheet steel, extends radially outwardly to a region of attachment to the frame.