Forming board for papermaking machine

Details Forming board for papermaking machine Forming board for papermaking machine

D - Textiles, Paper

21

F

92/17

D21F 1/10 (2006.01)

Patent

CA 1289798

FORMING BOARD FOR PAPERMAKING MACHINE ABSTRACT OF THE DISCLOSURE A papermaking machine having a forming wire, a headbox and a forming board is disclosed. The headbox includes a lower slice having an apron positioned substantially in alignment with and closely adjacent the forming board such that as the forming wire travels over the the forming board the jet of paper stock leaving the headbox is laid onto the wire at the board at substantially zero angle of impingement. The forming board further includes a lead-in blade over which the wire travels. The blade acts to deflect fluid, normally pumped by the wire along its path of travel, away from the underside to the jet of paper stock prior to this jet reaching the forming board. Advantage is found with the disclosed papermaking machine in that it substantially eliminates pumping of fluid to the underside of the stock, has zero angle of impingement of the stock onto the wire and prevents drainage at the point of impingement which reduces the loss of fine fibres through the wire and minimizes the disturbance of the paper stock resulting in better paper formation and increased operating speeds.

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