American Can Company

James River-norwalk, Inc.

James River-dixie/northern, Inc.

William C Bean

Thomas M Tao

Keith W Knudsen

Thomas J Ziolkowski

A method of producing a multi-ply paperboard comprising at least one ply high bulk fibers sandwiched between at least two plies of conventional papermaking fibers. In a preferred embodiment, high bulk fibers characterized by twists, kinks and curls are produced by mechanical deformation without substantial fibrillation or breakage of the fibers, as by dry hammermilling or wet milling of the fibers. An aqueous foam furnish is preferred for laying the ply containing high bulk fibers.

Method of manufacture of paperboard

A method of increasing the caliper and bulk of air laid dry fibrous webs, particularly such webs intended for use as napkin, tissue, and absorbent paper towel products by partially drying the loose formed fibrous webs to a degree of dryness of less than 4% prior to consolidation. In the preferred embodiment uniformity of the product web caliper in the machine direction is obtained by measuring the caliper downstream of the bond curing drier and before take-up on the parent roll, output signals therefrom being transmitted to the drier for adjustment of one or more of the drier parameters. Uniformity of caliper in the cross machine direction can be optimized by providing multisectional driers in the cross machine direction, a series of output signals from the caliper sensing means being transmitted to the respective drier sections for individual adjustment of the drier parameters.

Control of bulk in air laid fibrous webs

Method for the manufacture of a fibrous web comprises provision of a conduit having a plurality of outlets for discharging classified fibers onto a linearly movable planar section of an endless screen. The fibers pass through openings in the screen and land on an underlying planar section of a forming wire, in formation of the fibrous web, with the aid of an underlying vacuum box. Uniformity of fiber distribution is provided by parallel banks of brushes that engage the planar section of the endless screen and are rapidly oscillated in short, non-synchronous strokes transversely of the direction of screen movement.

Method for the manufacture of fibrous webs

Apparatus for the manufacture of a fibrous web comprises provision of a conduit having a plurality of outlets for discharging classified fibers onto a linearly movable planar section of an endless screen. The fibers pass through openings in the screen and land on an underlying planar section of a forming wire, in formation of the fibrous web, with the aid of an underlying vacuum box. Uniformity of fiber distribution is provided by parallel banks of brushes that engage the planar section of the endless screen and are rapidly oscillated in short, non-synchronous strokes transversely of the direction of screen movement.

Growing community of inventors

Larsen, WI, United States of America

William C Bean