APPARATUS AND METHOD FOR CONTROLLING CURLING POTENTIAL OF PAPER, PAPERBOARD, OR OTHER PRODUCT DURING MANUFACTURE

Title:

APPARATUS AND METHOD FOR CONTROLLING CURLING POTENTIAL OF PAPER, PAPERBOARD, OR OTHER PRODUCT DURING MANUFACTURE

Document Type and Number:

WIPO Patent Application WO/2011/146257

Kind Code:

A3

Abstract:

A method includes receiving a measurement associated with an anisotropy of a first surface and a measurement associated with an anisotropy of a second surface of a sheet of material (108, 215). The method also includes adjusting an operating parameter associated with a headbox (112, 240-250) based on the measurements. The headbox is associated with manufacture of the sheet. The operating parameter could include a jet speed (144), a jet impingement angle (148), a jet thickness, a slice opening, and/or a slice apron projection (142). Adjusting the operating parameter could be based on a difference between a measured anisotropy of the first surface and a measured anisotropy of the second surface. For example, the operating parameter could be adjusted to achieve a desired difference between the measured anisotropy of the first surface and the measured anisotropy of the second surface. Multiple headboxes (240-245) could be controlled, such as when different headboxes are used to produce different layers of a multi-layer sheet (215).

Inventors:

SHAKESPEARE JOHN F (US)

Application Number:

PCT/US2011/035481

Publication Date:

April 05, 2012

Filing Date:

May 06, 2011

Export Citation:

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Assignee:

HONEYWELL INT INC (US)
SHAKESPEARE JOHN F (US)

International Classes:

D21F11/00; B65H43/00; G01N21/84

Foreign References:

US5416980A	1995-05-23
US20020030319A1	2002-03-14
EP0785158A2	1997-07-23
EP1798018A1	2007-06-20

Other References: