Importance

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Abstract

A drainage foil apparatus for removing liquid from material carried across the foil by a moving foraminous conveyor such as the wood pulp stock in a paper making machine, is described. The drainage foil apparatus includes a foil having at least a nose portion of ceramic material formed by laterally spaced ceramic segments. The segments are mounted on a support means enabling individual replacement of such segments when they become damaged or worn. The support means includes a mounting member of metal which extends into a slot in a lower surface portion of the ceramic segment and is bonded thereto by a bonding material provided within the slot. For easy replacement of the ceramic segments, the mounting member and slot are shaped to enable each segment to be inserted and removed from such mounting member without moving other segments. In one embodiment, the ceramic nose portion is separate from the rear portion of the foil, such rear portion being made of a different material such as a synthetic plastic. In another embodiment, both the nose portion and the rear portion of the foil are made integral with the same ceramic member. In the first embodiment, the foil rear portion member may be provided with a different foil angle on its top and bottom surfaces and is mounted on the support means so that it can be inverted, to enable either surface to be the upper foil surface.

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First Claim