Back to results
US 8,060,234 B2Granted
Accurate tracking of web features through converting processes
AssigneeABB AB
InventorsAke Hellstrom, Tommi Huotilainen, Antti Saarela
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeABB AB
InventorsAke Hellstrom, Tommi Huotilainen, Antti Saarela
Estimating the term…
There is described a method and apparatus for tracking the location of web features through a converting process, one application of which can involve tracking paper defects from a paper machine as detected by a camera system, to a winder where the sheet is wound to rolls so that the web defects can be repaired in the winder before making the rolls. The method to track web features is based on pattern identification of inherent sheet variability or defects. The apparatus involves two or more sheet property or defect monitoring web sensors arranged at the same cross directional location at different stages of the converting operation, augmented by tachometers and/or roll diameter sensors. A full automation system for drive control on the winder based on this information is preferably added to make maximum advantage of this information.
A system for locating a defect of a moving sheet having naturally varying properties during first and second sheet making processes, said system comprising:
A method for tracking features of a moving sheet having naturally varying properties, the method comprising:
A computer program product stored on a non-transitory media for tracking features of a moving sheet having naturally varying properties, said computer program product comprising:
Dependencies are inferred from the claim text.