D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 9/02 (2006.01) D21F 1/02 (2006.01) D21F 1/20 (2006.01) D21F 1/48 (2006.01) D21F 7/00 (2006.01) D21F 11/04 (2006.01)
Patent
CA 2189446
The present invention refers to an under felt inclined flat former for making multilayer or monolayer sheets of paper. The forming unit is supported on corresponding rigid supports and is provided with a roll system on which the forming unit rests when the supports are removed, in such a manner that the selected forming unit can be removed from the production line for cleaning or maintenance purposes, without interrupting the operation of the former equipment. The paper sheet so formed has superior characteristics to that of a sheet made in a fourdrinier manufacturing table. Unlike prior art equipment, the present invention provides controls for fiber orientation. In addition, the present invention discloses a flow head box with a step diffuser. The step diffuser maintains the fibers in a state of complete dispersion. Thus, the advantages of using a step diffuser in combination with activity induction can eliminate streaks. Further, the present invention provides for an adjustable tensile ratio. The tensile ratio can be controlled by adjusting the fiber orientation while maintaining even distribution of fiber.
L'unité comprend essentiellement: une table de formation (84) ayant une toile pour la formation de la feuille de papier, un rouleau frontal (97) qui sert également d'élément tenseur, des couteaux de formation (86), un rouleau de formation (82) qui assure l'orientation libre ou régulée des fibres selon la vitesse du rouleau, une boîte à vide (74) divisée en trois compartiments dans lesquels l'eau restant de la suspension fibreuse est drainée. Des rails et des disques sont prévus pour l'entretien de l'unité de formation afin de sortir l'unité pour en assurer son entretien sans cesser la production. Une boîte de distribution amène la suspension fibreuse vers la table de formation (84) et un tablier de succion (134). Un rouleau coucheur (25) en caoutchouc possède un mécanisme qui ajuste sa position contre l'axe du rouleau support.
Gowling Lafleur Henderson Llp
Smurfit Carton Y. Papel de Mexico S.a. de C.v.
LandOfFree
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