| 摘要 |
The resistance of a screen, particularly a wedge wire screen, construction to destructive twisting moments, which cause breakage of the resistance welds between the screening wires or bars and the support bars, is effected by providing a plurality of wires embedded and brazed in grooves, or weld beads, or localized cross fusions, formed in the tops of the screening wires or bars, extending substantially perpendicular to the screening wires or bars. Alternatively a coining operation may be performed on the tops of the screening wires or bars. Utilizing such techniques it is possible to reduce the harmful twisting moment induced by a cellulose pulp slurry (e.g. at a consistency between about 0.5-5 %) by at least about 10 %, preferably by about 20-300 %.
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