Patent ID: 6165324
Filing Date: 2000-12-26
Classification: D21F

Abstract:
A headbox for discharging a multi-layer jet of papermaking stock having at least two stock layers to a forming zone in a former for wet-forming a fibrous web, comprising:a slice defining a slice chamber therein and a slice opening for discharging stocks from the slice chamber;at least one separator vane in the slice chamber so as to define two stock channels on opposite sides of the separator vane;at least one elongate construction element disposed in the headbox and defining a groove extending longitudinally along the construction element for receipt of an upstream end portion of the separator vane, said groove defining at least one longitudinally extending recess forming opposing support and guide walls spaced apart in a flow direction of the slice chamber; anda plurality of engagement members mounted in the separator vane proximate the upstream end thereof, the engagement members being arranged in a row and spaced from each other, each engagement member protruding from at least one side of the separator vane to form a free engagement end portion, the free engagement end portions of the engagement members being received in the recess between the opposing support and guide walls, each of the engagement members being yieldingly connected to the separator vane so as to allow the engagement member to be displaced laterally or rotatably relative to the separator vane when influenced by forces occurring at said support and guide walls during operation of the headbox.