Method to measure tension in a moving web and to control properties of the web
US6813941B2 · kind B2 · utility
8Cited by
35References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Jun 21, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for determining the tension in a moving web is provided. The process includes the step of providing a web that is moving at a determined speed. The speed has a determined basis weight. A wave is created in the moving web. The speed of the propagation of the wave is determined. Also, the tension on the moving web is determined through a mathematical relationship between the wave speed, the basis weight of the web, and the speed of the web. The instability index of the web is greater than or equal to 0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.