headbox

papermaking

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The Information Architects of Encyclopaedia Britannica

Last updated

June 29, 2026

Quick Summary

The headbox is a crucial component in a papermaking machine. Its primary function is to hold the paper stock (a mixture of cellulose fibers and water) and regulate its consistent flow onto the wire screen where the paper sheet is formed.12

In the papermaking process, the headbox ensures that an even distribution of stock is deposited across the width of the machine, which is essential for creating a paper sheet of uniform weight and quality. Modern headboxes are typically enclosed and maintain a constant pressure to achieve this precise control.3

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papermaking
Formation of paper sheet by machines
The function of the headbox is to distribute a continuous flow of wet stock at constant velocities, both across the width of the machine and lengthwise of the sheet, as stock is deposited on the screen. Equal quantities of properly dispersed stock should be supplied to all areas of…
Read More
The function of the headbox is to distribute a continuous flow of wet stock at constant velocities, both across the width of the machine and lengthwise of the sheet, as stock is deposited on the screen. Equal quantities of properly dispersed stock should be supplied to all areas of…
Read More