Headbox of paper machine or such

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 1/02 (2006.01)

Patent

CA 2411355

The invention concerns a headbox (10) of a paper machine or such. It includes a bypass manifold (J1), from which the pulp is conducted by way of pipes (11a1.1, 11a1.2, ...; 11a2.1, 11a2.2, ...) of pipe rows in a set of pipes (11) and an intermediate chamber (E) into a turbulence generator (12), or from the bypass manifold (J1) directly into the turbulence generator and by way of the pipes (12a1.1, 12a1.2, ...; 12a2.1, 12a2.2, ...) of the turbulence generator's (12) pipe rows into a lip cone (K) and further out from the headbox on to a formation wire. The turbulence generator (12) of the headbox includes a fluidisation element (14), wherein fluidisation is carried out in one stage only and in which structure as little disturbance as possible is then caused to the fluidised flow.

L'invention porte sur une caisse d'arrivée (10) d'une machine à papier ou analogue qui comprend un manifold de dérivation (J¿1?) à partir duquel la pâte est acheminée par des conduits (11a¿1.1?, 11a¿1.2?... ; 11a¿2.1?, 11a¿2.2?...) se présentant sous forme de rangées formant un ensemble de conduits (11), et une chambre intermédiaire (E) d'un générateur (12) de turbulences, ou bien depuis le manifold de dérivation (J¿1?) directement dans le générateur de turbulences et par des conduits (12a¿1.1?, 12a¿1.2? ... ; 12a¿2.1?, 12a¿2.2? ... faisant partie des rangées de conduits du générateur de turbulences (12) pour aboutir dans un cône à rebord (K), et également depuis la caisse d'arrivée pour aboutir sur la table plate de fabrication. Le générateur de turbulences (12) de la caisse d'arrivée comprend un élément de fluidisation (14), la fluidisation s'effectuant en une seule étape, dans lequel une structure génère le moins de perturbations possible dans l'écoulement fluidisé.

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