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Magazine articles
Web lateral instability caused by nonuniform paper properties, TAPPI Journal January 2022
ABSTRACT: Lateral or cross-machine direction (CD) web movement in printing or converting can cause problems such as misregistration, wrinkles, breaks, and folder issues. The role of paper properties in this problem was studied by measuring lateral web positions on commercial printing presses and on a pilot-scale roll testing facility (RTF). The findings clearly showed that CD profiles of machine direction (MD) tension were a key factor in web stability. Uneven tension profiles cause the web to move towards the low-tension side. Although extremely nonuniform tension profiles are visible as bagginess, more often, tension profiles must be detected by precision devices such as the RTF. Once detected, the profiles may be analyzed to determine the cause of web offset and weaving problems.Causes of tension profiles can originate from nonuniform paper properties. For example, by means of case studies, we show that an uneven moisture profile entering the dryer section can lead to a nonuniform tension profile and lateral web movement. Time-varying changes in basis weight or stiffness may also lead to oscillations in the web’s lateral position. These problems were corrected by identifying the root cause and making appropriate changes. In addition, we developed a mathematical model of lateral stability that explains the underlying mechanisms and can be used to understand and correct causes of lateral web instability.
Magazine articles
The 200th anniversary of the paper machine, part ii: the second 100 years, TAPPI JOURNAL, December 1997, Vol. 80(12)
The 200th anniversary of the paper machine, part ii: the second 100 years, TAPPI JOURNAL, December 1997, Vol. 80(12)
Magazine articles
Moulin vieux maintains heritage of france's grenoble-Isere papermaking region, TAPPI JOURNAL, June 1997, Vol. 80(6)
Moulin vieux maintains heritage of france's grenoble-Isere papermaking region, TAPPI JOURNAL, June 1997, Vol. 80(6)
Magazine articles
A reliable method to improve fabric life, TAPPI JOURNAL, March 1997, Vol. 80(3)
A reliable method to improve fabric life, TAPPI JOURNAL, March 1997, Vol. 80(3)
Magazine articles
Construction project safety planning, TAPPI JOURNAL, November 1997, Vol. 80(11)
Construction project safety planning, TAPPI JOURNAL, November 1997, Vol. 80(11)
Magazine articles
Photographic life-prediction matrix for forming fabrics, TAPPI JOURNAL, November 1997, Vol. 80(11)
Photographic life-prediction matrix for forming fabrics, TAPPI JOURNAL, November 1997, Vol. 80(11)
Magazine articles
Industry leaders: mead faces 21st century with productivity, positioning as key strategies, TAPPI JOURNAL, October 1997, Vol. 80(10)
Industry leaders: mead faces 21st century with productivity, positioning as key strategies, TAPPI JOURNAL, October 1997, Vol. 80(10)
Magazine articles
Recycling 'low value' post-consumer fibers to improve quality and reduce costs, TAPPI JOURNAL, September 1997, Vol. 80(9)
Recycling 'low value' post-consumer fibers to improve quality and reduce costs, TAPPI JOURNAL, September 1997, Vol. 80(9)
Magazine articles
On management: effective scheduling: a key management tool, TAPPI JOURNAL, April 1998, Vol. 81(4)
On management: effective scheduling: a key management tool, TAPPI JOURNAL, April 1998, Vol. 81(4)
Magazine articles
Leading the giant: an interview with john t. dillon, ceo and president, international paper, TAPPI JOURNAL, June 1998, Vol. 81(6)
Leading the giant: an interview with john t. dillon, ceo and president, international paper, TAPPI JOURNAL, June 1998, Vol. 81(6)