Influencing the profile of the properties of a web by means of at least one acoustic field

Abstract

The invention relates to a method and a device for the processing of a fiber web or a suspension layer in a paper-, cardboard- or coating-machine or a size press for influencing the profile of the properties of a web by means of at least one sectional, directed acoustic (sound) field. In other words, the acoustic field is narrower than the width of the fiber web or the suspension layer, and the acoustic field affects components of the fiber web or suspension layer at a defined angle. Profiles of the properties of a web influenced by acoustic fields are lamination, spatial orientation, fiber orientation, dry content, breaking length ratio, flocculation and color coat thickness. Furthermore, the introduction of a signature mark into the fiber web or suspension layer is possible.

1 . Method for the processing of a fiber web or a suspension layer ( 12 ) in a paper-, cardboard- or coating-machine or a size press for influencing of a profile of properties, 
 wherein,    said influencing of a profile of properties uses at least one sectional, directed sound field ( 25 ), which means that the sound field is narrower than the width of the fiber web or the suspension layer ( 12 ) and that the sound field affects, under a defined angle, the components of the fiber web or suspension layer ( 12 ).    
   
   
       2 . Method as in  claim 1 , 
 wherein,    said profile of properties is a profile—a so called Z-profile—which is perpendicular to the plane of the fiber web or suspension layer ( 12 ).    
   
   
       3 . Method as in  claim 1 , wherein, 
 said profile of properties is a cross profile, which means, that this profile is orientated crosswise to the running direction ( 15 ,  16 ) and to the plane of the fiber web or suspension layer ( 12 ).    
   
   
       4 . Method according to  claim 1 , wherein, 
 an emitter ( 22 ) generates said sound field by means of a liquid transmitting media ( 27 ).    
   
   
       5 . Method according to  claim 1 , wherein, 
 at least one further sectional, directed sound field ( 25 ) affects the components of the fiber web or suspension layer ( 12 ) of this section, wherein this further sound field ( 25 )—in view of the running direction ( 15 ,  16 )—can be offset to the first sound field ( 25 ).    
   
   
       6 . Method as in  claim 5 , 
 wherein,    the first sound field ( 25 ) and the second sound field ( 25 ) simultaneously affect the components of the fiber web or suspension layer ( 12 ) and interfere—at least partly—with each other.    
   
   
       7 . Method according to  claim 1 , wherein, 
 the second sound field ( 25 )—at least partly—will generated by the first sound field ( 25 ) by means of reflection.    
   
   
       8 . Method according to  claim 1 , wherein, 
 a standing wave ( 49 ) affects the components of the fiber web or suspension layer ( 12 ).    
   
   
       9 . Method as in  claim 8 , 
 wherein,    the standing wave ( 49 ) consists of a sound field ( 25 ) and of its—at least partly—reflection.    
   
   
       10 . Method according to  claim 1 , wherein, 
 the direction of the sound field ( 25 ) will be deflected by means of refraction at its transition from solid to liquid matter.    
   
   
       11 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ) the lamination of the fiber web or the suspension layer ( 12 ) will be influenced in its Z-direction.    
   
   
       12 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ) the orientation to the spatial axis of the components of the fiber web or suspension layer ( 12 ) will be influenced.    
   
   
       13 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ) the fiber orientation—this means the fibers in the plane of fiber web or suspension layer ( 12 )—will be influenced.    
   
   
       14 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ), the dry content of a fiber web or suspension layer ( 12 ) will be influenced.    
   
   
       15 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ), the breaking length ratio of a fiber web or suspension layer ( 12 ) will be influenced.    
   
   
       16 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ), the flocculation of a fiber web or suspension layer ( 12 ) will be influenced.    
   
   
       17 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ), the color coat thickness of a fiber web or suspension layer ( 12 ) will be influenced.    
   
   
       18 . Method according to  claim 1 , wherein, 
 by means of at least one sound field ( 25 ), the liquid thickness of a size press of a fiber web or suspension layer ( 12 ) will be influenced.    
   
   
       19 .- 22 . (canceled)  
   
   
       23 . Paper or cardboard according to  claim 1 , wherein, 
 at least one profile of properties of a web influenced by means of one sectional, directed sound field ( 25 ).    
   
   
       24 .- 27 . (canceled)  
   
   
       28 . Device for the processing of a fiber web or suspension layer ( 12 ) in a paper-, cardboard- or coating-machine or size press of influencing of a profile of properties, wherein, 
 at least one sectional emitter ( 22 ) generates a sound field ( 25 ), between the emitter ( 22 ) and the components of the fiber web or suspension layer ( 12 ) a liquid transmitting media ( 27 ) is arranged.    
   
   
       29 .- 46 . (canceled)