Forming board for papermaking machine with adjustable blades

Details Forming board for papermaking machine with adjustable blades Forming board for papermaking machine with adjustable blades

D - Textiles, Paper

21

F

D21F 1/54 (2006.01) D21F 1/00 (2006.01) D21F 1/48 (2006.01)

Patent

CA 2480948

A forming board for a papermaking machine includes: a support; a transversely- extending lead blade attached to the support, the lead blade; a plurality of transversely-extending trailing blades; a mounting unit for each of the plurality of trailing blades, the mounting unit being attached to a respective trailing blade and to the support such that the upper surfaces of the lead blade and the trailing blades are substantially coplanar and such that gaps are defined between the trailing edges and leading edges of adjacent blades, the gaps being of substantially uniform width; and a drive unit attached to the mounting unit and to the support, the drive unit being configured to drive the trailing blades simultaneously to different longitudinal positions relative to the support, wherein the gap widths vary but remain substantially uniform.

Ce marbre pour machine à papier comporte un support, un couteau d'attaque se déployant transversalement et fixé au support, plusieurs couteaux traînants se déployant transversalement, une monture pour chaque couteau traînant, fixée au couteau et au support, de sorte que la face supérieure du couteau d'attaque et des couteaux traînants soient quasiment coplanaires et qu'il existe des intervalles ayant sensiblement la même largeur entre les bords de fuite et les bords d'attaque de couteaux adjacents. Un mécanisme d'entraînement, qui est fixé à la monture et au support, est configuré pour entraîner simultanément les couteaux traînants dans différentes positions longitudinales par rapport au support, la largeur des intervalles variant mais restant sensiblement uniforme.

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