Sheet manufacturing apparatus

Abstract

To manufacture sheets of uniform quality, a sheet manufacturing apparatus has a drum with a plurality of holes; a housing covering the drum; a conveyor on which material including fiber that has passed through the holes accumulates as a web, and which conveys the accumulated web; a first roller that is a first roller disposed to contact the web conveyed by the conveyor, and has asperities on its outside surface; and a first seal disposed to a first wall of the first housing to contact an outside surface of the first roller.

1 . A sheet manufacturing apparatus comprising:
 a drum with a plurality of holes;   a first housing covering the drum;   a conveyor on which material including fiber that has passed through the holes accumulates as a web, and which conveys the accumulated web;   a first roller that is a first roller disposed to contact the web conveyed by the conveyor, and has asperities on an outside surface; and   a first seal disposed to a first wall of the first housing to contact an outside surface of the first roller.   
     
     
         2 . The sheet manufacturing apparatus according to  claim 1 , wherein:
 the asperities are disposed to the outside surface of the first roller in an area that contacts the web.   
     
     
         3 . The sheet manufacturing apparatus according to  claim 1 , wherein:
 the surface roughness of the outside surface of the first roller is greater than or equal to 30 μm and less than or equal to 500 μm.   
     
     
         4 . The sheet manufacturing apparatus according to  claim 1 , wherein:
 the first roller has a channel formed to a depth greater than or equal to 30 μm and less than or equal to 500 μm in the outside surface in a direction intersecting a direction of rotation of the first roller.   
     
     
         5 . The sheet manufacturing apparatus according to  claim 1 , wherein:
 the asperities of the first miler are formed in a screen pattern.   
     
     
         6 . The sheet manufacturing apparatus according  claim 1 , wherein:
 the first roller has a round recess with a depth greater than or equal to 30 μm and less than or equal to 500 μm, and a width greater than or equal to 0.1 mm and less than or equal to 2 mm, in the outside surface.   
     
     
         7 . The sheet manufacturing apparatus according to  claim 6 , further comprising:
 a removal device that contacts an outside surface of the first roller, and removes material stuck to the outside surface of the first miler.   
     
     
         8 . The sheet manufacturing apparatus according to  claim 1 , wherein:
 the first seal contacts an outside surface of the first roller at an angle of greater than or equal to 45 degrees and less than or equal to 90 degrees to a virtual vertical plane tangent to an outside surface of the first miler.   
     
     
         9 . The sheet manufacturing apparatus according to  claim 1 , further comprising:
 a second roller positioned on upstream in the conveyance direction of the web from the first roller, and   a second seal disposed to a second wall opposite a first wall of the first housing to contact the second roller,   the second roller having asperities on its outside surface.   
     
     
         10 . The sheet manufacturing apparatus according to  claim 1 , wherein:
 the conveyor has a mesh member that conveys the web;   the sheet manufacturing apparatus including a suction device configured to suction material including fiber onto the mesh member, and having a second housing defining the suction area;   a third roller that is a third roller disposed to a position opposite the first roller with the mesh member therebetween, and has asperities on its outside surface; and   a third seal disposed to the second housing to contact an outside surface of the third roller.   
     
     
         11 . A sheet manufacturing apparatus comprising:
 a drum with a plurality of holes;   a housing covering the drum;   a conveyor on which material including fiber that has passed through the holes accumulates as a web, and which conveys the accumulated web;   a first roller that contacts a web conveyed by the conveyor; and   a first seal that is a first seal disposed to a first wall of the housing to contact an outside surface of the first roller, and contacts an outside surface of the first roller at an angle of greater than or equal to 45 degrees and less than or equal to 90 degrees to a virtual vertical plane tangent to an outside surface of the first roller.