Grooved and perforated layer for use in papermakers' fabric

Details Grooved and perforated layer for use in papermakers' fabric Grooved and perforated layer for use in papermakers' fabric

2007-01-23

2007-01-23

Hug, Eric (Department: 1731)

Paper making and fiber liberation

Apparatus

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

C162S900000, C428S131000, C428S137000, C428S167000, C428S169000, C442S270000, C442S286000, C442S394000

Reexamination Certificate

active

10619393

ABSTRACT:
A grooved perforated layer for use in a papermakers' fabric is provided. The grooves serve to diffuse flow at the surface of the perforated layer so as to reduce the pressure drop across the layer and thereby reduce the migration of fines. In this manner, the light/dark pattern associated with the fines is avoided and the quality of the resulting paper sheet is improved.

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