Apparatus for Cleaning a Fiber Suspension for a Papermaking Process

Abstract

An apparatus for cleaning a fiber suspension for papermaking of foreign substances contained therein, such as sand, metal parts, glass splinters, bark fragments and the like, by using a tubular, vertically aligned housing, which is constructed with an inlet for the introduction of the fiber suspension into this housing under pressure, also provided at its lower end with an outlet for discharging the foreign substances contained in the fiber suspension and at its upper end with an outlet for leading off the fiber suspension freed of the foreign substances. In this case, at least a portion of the housing, or the lower housing parts, or at least a casing that encapsulates the lower housing parts, are produced from a transparent or a see-through material, in particular from a transparent or a see-through plastics material.

1 . An apparatus for cleaning a fiber suspension in a papermaking process of foreign substances, comprising:
 a tubular, vertically aligned housing formed of a lower housing part and an upper housing part;   said housing being formed with an inlet for introducing the fiber suspension with foreign substances into said housing under pressure;   said housing having a lower end formed with an outlet for discharging therefrom the foreign substances after removal from the fiber suspension, and an upper end formed with an outlet for discharging therefrom the fiber suspension freed of the foreign substances;   wherein said lower housing part has an exterior wall formed, in portions thereof or entirely, of a see-through material.   
   
   
       2 . The apparatus according to  claim 1 , wherein said exterior wall of said lower housing part is formed of a transparent plastics material. 
   
   
       3 . The apparatus according to  claim 1 , wherein said lower housing part is formed of a transparent plastics material. 
   
   
       4 . The apparatus according to  claim 1 , wherein said lower housing part is formed with a casing enclosing an inner housing, said casing defining said exterior wall of said lower housing part. 
   
   
       5 . The apparatus according to  claim 4 , wherein said casing is formed of a see-through material at least in portions thereof. 
   
   
       6 . The apparatus according to  claim 5 , wherein said casing is formed of transparent polyurethane. 
   
   
       7 . The apparatus according to  claim 5 , wherein said casing is formed of glass-clear polycarbonate. 
   
   
       8 . The apparatus according to  claim 5 , wherein said inner housing is formed of a see-through material. 
   
   
       9 . The apparatus according to  claim 1 , wherein said lower housing part is formed of transparent polyurethane. 
   
   
       10 . The apparatus according to  claim 1 , wherein said lower housing part is formed of glass-clear polycarbonate. 
   
   
       11 . The apparatus according to  claim 1 , wherein said housing is formed of transparent polyurethane. 
   
   
       12 . The apparatus according to  claim 1 , wherein said housing is formed of glass-clear polycarbonate.