Abstract: The machine for making a non-woven material aerologically has a forming and conveying surface permeable to air, a dispersion chamber surmounting said surface and means, particularly vacuum means located under said forming and conveying surface of the non-woven material, which are capable not only of producing an air flow inside the dispersion chamber that allows the fibers inside the chamber to disperse and projects them onto the forming and conveying surface, but also create a vacuum in one zone—called the vacuum zone (9)—of the forming and conveying surface (1) of the non-woven material that extends under the dispersion chamber (2) and downstream from it, with the vacuum speed decreasing between the upstream and downstream parts of said zone (9).

Abstract: The machine for making a non-woven material aerologically has a forming and conveying surface permeable to air, a dispersion chamber surmounting said surface and means, particularly vacuum means located under said forming and conveying surface of the non-woven material, which are capable not only of producing an air flow inside the dispersion chamber that allows the fibers inside the chamber to disperse and projects them onto the forming and conveying surface, but also create a vacuum in one zone—called the vacuum zone (9)—of the forming and conveying surface (1) of the non-woven material that extends under the dispersion chamber (2) and downstream from it, with the vacuum speed decreasing between the upstream and downstream parts of said zone (9).

Abstract: A fiber web is formed by the airlay technique on a web forming and transport surface by dispersing and projecting individualized fibers onto said surface by means of a flow of air, and the fibers are subjected to a carding operation prior to being inserted into the flow of air. According to an essential characteristic of the invention, action is taken on the fiber feed rate by means of one or more regulator systems between the carding operation and the insertion of the fibers into the air flow so as to make said fiber feed rate more regular. In a preferred variant of the invention, a regulator system comprises at least a combing cylinder which is designed to be rotated to have a circumferential speed that is strictly less than that of the carding cylinder and that rotates in a direction of rotation that is opposite to that of the carding cylinder, and that is coated on its periphery with a covering whose teeth or spikes point backwards, i.e. in the opposite direction to its direction of rotation.

Abstract: Apparatus for forming a lap of stock fibers, in particular for continuously loading a textile machine such as a card, the apparatus comprising a feed chimney (4) which is open at its top and bottom ends (4a, 4b) and which is provided with an air exhaust opening (9) of given section or with a plurality of air exhaust openings distributed over a given section. The exhaust opening(s) (9) opening out directly into an expansion chamber (13). The air inside the expansion chamber is taken up by suction via a air manifold chamber (18a) which is designed to have low pressure established therein, and which communicates with the expansion chamber (13) via an air takeup slot (14) which extends substantially over the entire width l of the section of the exhaust opening(s) (9) or via a plurality of air takeup openings which are distributed substantially over the entire width l of the section of the exhaust opening(s) (9).

Abstract: The oscillating mechanical device comprises a shaft on which an oscillating member is mounted, and which is resiliently urged towards a middle angular equilibrium position, together with a single-phase induction motor whose rotor is coupled to the shaft so as to enable oscillations of the shaft to be sustained. According to the invention, the stator of the single-phase induction motor is fed with an alternating drive signal whose frequency is adjusted to the vicinity of the natural frequency of oscillation of the mechanical device. More particularly, the frequency of the drive signal of the stator is set to lie in the frequency range ?f-0.8 Hz; f+0.1 Hz!, where f represents the natural frequency of oscillation of the mechanical device, and is preferably set to the natural frequency of oscillation of the mechanical device with a tolerance of plus or minus one-tenth of one hertz. The device is applicable to card web combs used in the textile industry.

Abstract: The device for stripping the web of fibres (2) from the doffer roller (1) in a carding machine which includes a fly comb (3) on the output side of the doffer roller is characterized in that it comprises a toothed roller (5) cooperative with the doffer roller (1) for the purpose of stripping the web (2) from the latter, the fly comb being cooperative with the toothed roller when starting up the carding machine for the purpose of stripping the web from the toothed roller, whereas, at high speed, the web directly leaves the toothed roller (5) without cooperating with the fly comb.