Thibeau

Thibeau (Sa)

Asselin-Thibeau

Xavier Catry

Henri Genevray

Jean-Christophe Laune

Marc Brabant

Christian Vanbeselaere

Jean-Louis Dupont

Reinhold Doring

Didier Deldique

Marc Barbant

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&#x2014;called the vacuum zone ()&#x2014;of the forming and conveying surface () of the non-woven material that extends under the dispersion chamber () and downstream from it, with the vacuum speed decreasing between the upstream and downstream parts of said zone (). The wall downstream () from the vacuum chamber () is a plate, and the lower edge () of said downstream wall () delimits, along with the upper end () of the forming and conveying surface of the non-woven material (), a space for passage whose height is greater than the thickness of the non-woven material () coming out of the dispersion chamber ().

Machine for making a non-woven material by aerological means using a decreasing air flow

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.

Method and an installation for forming a fiber web by the airlay technique

Device for forming a sheet-lap of fibre tufts, in particular for loading

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.

Oscillating mechanical device, in particular a card web comb for a

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.

Device for stripping the web of fibres from the doffer roller in a

Growing community of inventors

Hem, France

Xavier Catry