Method and apparatus for measuring web tension profile to control the reeling of a web
AssigneeMetso Paper, Inc.
InventorsMatti Innala, Teppo Kojo, Mika Tammenoja
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Abstract
A method and apparatus for reeling or winding of a web in which one or more factors affecting the web in the reeling or winding process are controlled by means of measurement data in order to affect the quality of the reel or roll formed in the reeling or winding process. The is measurement data used is the web tension profile of the web brought into the reeling. The web tension profile is measured by means of a measuring device from which the web tension profile data is transmitted to a data processing unit which adjusts the factors affecting the web during reeling or winding.
Claims17
A method for the reeling or winding of a web, in which method one or more factors or manipulated variables affecting the web in a reeling or winding process are controlled during the reeling or winding by means of measurement data in order to affect the quality of the reel or roll formed in the reeling or winding, said method comprising the steps of:
- defining a point for a web tension profile measurement;
- measuring at said point for the web tension profile measurement the web tension profile of a full width web, said full width web is reeled to provide web tension information;
- processing of said web tension profile information of said full width web to be reeled by means of a data processing unit;
- converting said web tension profile information by said data processing unit into at least one control signal for each of said factors or manipulated variables of said reeling or winding process;
- and
- profiling of said factors or manipulated variables of said reeling or winding process affecting said web at a point in a direction of travel of the web after the point of web tension profile measurement in a transverse direction to said web by means of said web tension profile information.
An apparatus in the reeling or winding of a web, comprising:
- a measuring device structured and arranged to measure a web tension profile of a full width web to be reeled;
- and
- a data processing unit connected to a reeling or winding device and arranged to process said web tension profile produced by said measuring device and to convert said profile into at least one control signal which effects a profiling of a factor or manipulated variable of the reeling or winding affecting said web in a transverse direction to said web at a point in a direction of travel of the web after said measuring device.
Dependencies are inferred from the claim text.