Andritz Inc.

Paperchine, Inc.

Ralph Prescott

Jay Shands

A method for controlling a slice flow of a slurry having two or more component slurries through a headbox for a paper making machine includes, inputting a wire speed of the paper making machine; determining a jet velocity setpoint based on the wire speed; determining a header pressure setpoint for two or more headers to generate the jet velocity determined by the jet velocity setpoint, each header providing one of the two or more component slurries to the headbox; and controlling the slice flow by: generating a first speed command to a first slurry pump to generate a header pressure determined by the header pressure setpoint in a first header; and generating a second speed command to a second slurry pump to generate the header pressure determined by the header pressure setpoint in a second header.

Controlling the slice flow of a slurry through a headbox

A measuring device and method for simultaneously measuring both a slice lip opening and a setback of a headbox slice in a headbox of a papermaking machine are provided. The measuring device is formed by a block having a stop depending from the bottom at the back of the block that is adapted to be placed against the apron lip tip. A height measurement scale is located on a side surface and extends in a direction from the front to the back adapted for measuring the slice opening b. A setback distance measurement scale is located at the top extending from a zero position aligned in a fixed relation with the stop surface toward a front of the block for measuring the setback L. A movable sliding indicator connected to the block slides includes a slice lip locator adapted to move into sliding contact with the slice lip to indicate the setback distance L on the setback distance measuring scale while simultaneously indicating the slice opening b on the height measurement scale.

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Roscoe, IL, United States of America

Ralph Prescott