Trailing element for a headbox

Details Trailing element for a headbox Trailing element for a headbox

1998-04-08

1998-10-13

Chin, Peter

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162336, 162344, 162374, D21F 106

Patent

active

058207341

ABSTRACT:
A graphite composite trailing element for a headbox of a paper making machine is described. A protective layer is provided at or around pondside edges of a trailing element. The protective layer reinforces the pondside edges of the element to protect the edges from damage. The protective layer can also provide a protective sheath around the edges of the element to help prevent stock from being absorbed between the composites making up the elements. With reinforced edges and a protective sheath, the bonded composite sheets of the element are less susceptible to separation and delamination thereby resulting in an improved graphite composite trailing element. The protective layer can be made from any number of woven fiber glass mesh materials and is embedded in an epoxy base. The protective layer is compatible with the bonding and curing requirements of the composite sheets making up the trailing element.

REFERENCES:
patent: 4566945 (1986-01-01), Ewald et al.
patent: 4617091 (1986-10-01), Rodal et al.
patent: 5013406 (1991-05-01), Hergert

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