Paste screener

Abstract

The present invention relates to a screener for removing foreign substances contained in a paste, and a method for removing foreign substances contained in paste by using a screener.

1 . A screener for removing foreign substances in a paste comprising: 
 a screen mesh which removes the foreign substances in a paste;    a squeegee which stirs the supplied paste and squeezes it onto the screen mesh; and    a tank which stores the paste passing through the screen mesh, said tank characterized in that the area of the underside of said squeegee parallel with the screen mesh is 10 or above when the rotation area of the squeegee is 100 arbitrary units.    
   
   
       2 . A screener as set forth in  claim 1 , equipped with a vacuum unit for reducing the pressure in the tank.  
   
   
       3 . A screener as set forth in  claim 1 , wherein the squeegee is off-contact with the screen mesh.  
   
   
       4 . A screener as set forth in  claim 1 , wherein the area of the underside of said squeegee is 20 or more when the rotation area of the squeegee is 100 arbitrary units.  
   
   
       5 . A screener as set forth in  claim 1 , wherein the area of the underside of said squeegee is 50 or more when the rotation area of the squeegee is 100 arbitrary units.  
   
   
       6 . A screener as set forth in  claim 1 , wherein the squeegee is bar-shaped.  
   
   
       7 . A screener as set forth in  claim 1 , wherein the squeegee is Crisscross-shaped.  
   
   
       8 . A screener as set forth in  claim 1 , wherein the squeegee is disc shaped.  
   
   
       9 . A screener as set forth in  claim 8 , wherein the paste is supplied through an opening in the underside of the squeegee.  
   
   
       10 . A screener as set forth in  claim 1 , wherein the underside of the squeegee has a tapered edge in the direction of rotation.  
   
   
       11 . A screener as set forth in  claim 1 , wherein the squeegee is made of polyacetal resin.  
   
   
       12 . A method of removing foreign substances in a paste, comprising the steps of: 
 (a) providing a screener comprising a screen mesh which removes the foreign substances in a paste,    (b) stirring the paste of (a) with a squeegee, said squeegee having a top side and an underside, and    (c) squeezing, with the squeegee, the stirred paste onto the screen mesh,    wherein the paste that passes through the screen mesh is stored in a tank and wherein the area of the underside of said squeegee parallel with the screen mesh is 10 or above when the rotation area of the squeegee is 100 arbitrary units.    
   
   
       13 . The method of  claim 12 , wherein the screener is equipped with a vacuum unit for reducing the pressure in the tank.  
   
   
       14 . The method of  claim 12 , wherein the squeegee is off-contact with the screen mesh.  
   
   
       15 . The method of  claim 12 , wherein the area of the underside of said squeegee is 20 or more when the rotation area of the squeegee is 100 arbitrary units.  
   
   
       16 . The method of  claim 12 , wherein the area of the underside of said squeegee is 50 or more when the rotation area of the squeegee is 100 arbitrary units.  
   
   
       17 . The method of  claim 12 , wherein the squeegee is bar-shaped.  
   
   
       18 . The method of  claim 12 , wherein the squeegee is Crisscross-shaped.  
   
   
       19 . The method of  claim 12 , wherein the squeegee is disc shaped.  
   
   
       20 . The method of  claim 12 , wherein the paste is supplied through an opening in the underside of the squeegee.  
   
   
       21 . The method of  claim 12 , wherein the underside of the squeegee has a tapered edge in the direction of rotation.  
   
   
       22 . The method of  claim 12 , wherein the squeegee is made of polyacetal resin.  
   
   
       23 . A paste screened by the method of  claim 12 .  
   
   
       24 . A paste passed through the screener of  claim 1.