Patent ID: 6736938
Filing Date: 2004-05-18
Classification: D21F

Abstract:
A headbox for delivering a flow of stock to a forming zone in a former for wet-forming a fiber web, comprising:a slice defining a slice chamber and a slice opening; at least one vane arranged in the slice chamber to divide the flow of stock into at least two separate channels; a turbulence generator coupled with the slice, the turbulence generator defining a plurality of turbulence channels corresponding to the number of channels in the slice chamber, each turbulence channel feeding stock to one of the channels in the slice chamber, the turbulence generator having an anchoring element for each vane, each anchoring element being arranged between adjacent turbulence channels; and a mounting arrangement for mounting each vane to the corresponding anchoring element, the mounting arrangement comprising: a pivot member rigidly connected with an upstream end of the vane, the pivot member extending in the cross-machine direction; a continuous engagement groove defined in the anchoring element, the engagement groove extending in the cross-machine direction and being open toward the slice chamber; and an assembly bar extending along the anchoring element and having a protrusion configured to be received in the engagement groove to form a rigid joint between the assembly bar and the anchoring element, and having a continuous journaling groove configured to receive the pivot member connected with the vane to fix the vane to the assembly bar while leaving the vane free to pivot about a pivot axis that extends in the cross-machine direction.