Patent ID: 6146502
Filing Date: 2000-11-14
Classification: D21F

Abstract:
In a Fourdrinier paper-making machine, the improvement comprising a pair of parallel deckle belt means defining the lateral limits of the liquid paper-making stock as it exits from the head box onto a Fourdrinier fabric and for a short distance downstream from said head box, each said deckle belt means including an endless taut loop of movable deckle belt about two spaced pulleys to provide a movable wall positioned normal to the plane of said Fourdrinier fabric supporting said paper-making stock as it leaves said head box, variable speed motor means for driving one of said two spaced pulleys of each said deckle belt means, said movable wall being flexible and substantially impermeable to said liquid paper-making stock and being driven by said motor means to travel at substantially the same linear speed as that of said Fourdrinier fabric, said deckle belt means being adjustable in position so as to be rapidly movable from an operable position where said movable wall between said pulleys only touches said Fourdrinier fabric and prevents any material leakage laterally from said liquid paper-making stock resting on said fabric to an inoperable position where said movable wall does not touch the liquid paper-making stock on said fabric nor said fabric.