Dewatering table bar for the wire cloth or felt in a pulp-dewatering machine

Claim 2

In a dewatering table bar for the moving wire cloth or felt of a paper making or like pulp dewatering machine, the table bar comprising means for stationary mounting thereof on such machine transversely to the direction of motion of the wire cloth or felt, and having a surface in sliding contact with the underside thereof, including a leading edge and a trailing edge, the leading edge being formed of a harder wear resistant element embedded in a softer less wear resistant body member, the improvement wherein the softer member is formed of a steatite material having substantially the same coefficient of expansion as the harder element.

Claim 3

A table bar according to claim 1, wherein the harder element is an insert member fitted into an aperature or recess of the softer body member and the softer member forms the remainder of the sliding surface of the table bar.

Claim 4

A table bar according to claim 2, wherein the harder element is formed from a ceramic oxide.

Claim 5

A table bar according to claim 1, wherein the surface thereof in sliding contact with the wire cloth or felt slopes downwardly from the leading edge to the trailing edge thereof.

Claim 6

A table bar according to claim 4, wherein the sloping surface is curved so as to conform with the catenary formed by the wire cloth or felt.

Claim 7

A table bar according to claim 2 wherein the harder element and the softer body member each are segmented, the segments of the harder element are joined together end to end and the segments of the softer body member also are joined together end to end, the segments being joined together in the longitudinal direction of the table bar with the joints joining adjacent segments of the softer body member being offset longitudinally from the joints joining adjacent segments of the harder element.

Claim 8

A table bar according to claim 1 wherein the means for mounting thereof on such machine comprises a groove means in the side thereof opposite the side in sliding contact with the wire cloth or felt, for mounting the table bar on a mating section of the underframe of a paper making machine.

Claim 9

A table bar according to claim 6 wherein the segments of the softer body member have at least one channel extending longitudinally therethrough, through which a bar extends to form a unit of a length sufficient to extend the width of a paper making machine.

Claim 10

A table bar according to claim 3 wherein the surface thereof in sliding contact with the wire cloth or felt slopes downwardly from the leading edge to the trailing edge thereof and is curved so as to conform with the catenary formed by the wire cloth or felt, wherein the harder element and the softer body member each are segmented, the segments of the harder element are joined together end to end and the segments of the softer body member also are joined together end to end, the segments being joined together in the longitudinal direction of the table bar with the joints joining adjacent segments of the softer body member being offset longitudinally from the joints joining adjacent segments of the harder element.

Claim 11

A table bar according to claim 9 wherein the harder element is an insert member fitted into an aperature or recess of the softer body member and the softer body member forms the remainder of the sliding surface of the table bar and wherein the means for mounting thereof on such machine comprises a groove means in the side thereof opposite the side in sliding contact with the wire cloth or felt, for mounting the table bar on a mating section of the underframe of a paper making machine.