Device For Applying Liquid To A Running Web

Abstract

Disclosed is a device for applying liquid onto a running web (B), particularly dyeing liquid onto a textile web with a pole. The inventive device is embodied so as to be selectively operable in an injection mode in which the liquid is delivered to the volume of the web (B) at an increased pressure or in a pouring mode in which the liquid is applied to at least one surface of the web (B).

1 . A device for applying liquid to a running web (B), in particular for applying dyeing liquid to a textile web with a pile, said device comprising an application means ( 2 ) which is arranged above the web (B) and from which the liquid is delivered to the web (B), wherein the device is configured in such a way that it can be alternately operated in injection mode, in which the liquid is delivered at high pressure to the volume of the web (B), or in pouring mode, in which the liquid is applied to at least one surface of the web (B).  
   
   
       2 . The device as claimed in  claim 1 , wherein a web guide means ( 3 ) is provided with which the web (B) is guided under the application means ( 2 ).  
   
   
       3 . The device as claimed in  claim 2 , wherein the distance between the application means ( 2 ) and the web guide means ( 3 ) is variable.  
   
   
       4 . The device as claimed in  claim 1 , wherein the application means ( 2 ) extends across the entire width of the web.  
   
   
       5 . The device as claimed in  claim 2 , wherein the web guide means ( 3 ) extends across the entire width of the web.  
   
   
       6 . The device as claimed in  claim 2 , wherein the application means ( 2 ) and the web guide means ( 3 ) are arranged approximately perpendicularly one above the other.  
   
   
       7 . The device as claimed in  claim 2 , wherein the web guide means ( 3 ) is arranged such that it can be adjusted in height.  
   
   
       8 . The device as claimed in  claim 1 , wherein the application means ( 2 ) comprises a liquid chamber ( 15 ) extending transversely with respect to the running direction of the web.  
   
   
       9 . The device as claimed in  claim 8 , wherein, at its base, the liquid chamber ( 15 ) has bores ( 19 ) whose cross section is smaller than the cross section of the liquid chamber ( 15 ).  
   
   
       10 . The device as claimed in  claim 9 , wherein the bores ( 19 ) communicate with an application slit ( 39 ) that extends transversely with respect to the running direction of the web (B).  
   
   
       11 . The device as claimed in  claim 10 , wherein, between the application slit ( 39 ) and those ends of the bores ( 19 ) opening into the latter, a baffle surface ( 30 ) is provided which is oriented obliquely with respect to the direction of flow of the liquid emerging from the bores.  
   
   
       12 . The device as claimed in  claim 11 , wherein the baffle surface ( 30 ) encloses an angle of approximately 45° with the direction of flow.  
   
   
       13 . The device as claimed in  claim 11 , wherein the area of the baffle surface ( 30 ) is divided into a plurality of channels ( 32 ) by means of mutually parallel webs ( 31 ).  
   
   
       14 . The device as claimed in  claim 13 , wherein the number of channels ( 32 ) corresponds to the number of bores ( 19 ).  
   
   
       15 . The device as claimed in  claim 1 , wherein means are provided with which the effective application length of the application slit ( 39 ) can be varied.  
   
   
       16 . The device as claimed in  claim 15 , wherein the means comprise at least one shut-off slide ( 36 ) that can alternately be pushed laterally into the liquid chamber ( 15 ).  
   
   
       17 . The device as claimed in  claim 1 , wherein the application means ( 2 ) has a separate application plate ( 18 ) on the side directed toward the web (B).  
   
   
       18 . The device as claimed in  claim 17 , wherein the application plate ( 18 ) is articulated with a long edge on the application means ( 2 ) via a hinge ( 35 ) whose hinge axis (S) is oriented parallel to the longitudinal direction of the liquid chamber ( 15 ).  
   
   
       19 . The device as claimed in  claim 2 , wherein the web guide means ( 3 ) comprises a flexible pressing element over which the web (B) is guided.  
   
   
       20 . The device as claimed in  claim 19 , wherein the pressing element comprises a pneumatic support element ( 7 ).