Sheet processing apparatus

Abstract

A sheet processing apparatus takes out postal matters that are inserted by a take-out roller, and separates them in sheets by a feed roller and a reversing roller, and feeds into the apparatus. A cleaning roller having rubber sponges having foamed vesicles in mean diameter 50 to 500 μm is provided to the feed roller in contact with it. Paper-dusts on the surfaces of the feed roller and the reversing roller are removed by driving this cleaning roller to rotate at a velocity equal to or higher than a rotating speed of the feed roller.

1 . A sheet processing apparatus comprising: 
 conveying means for conveying sheets in contact with them;    processing means for performing a specified process of the sheets conveyed by the conveying means; and    a cleaning roller of which surface is formed of a porous material to remove paper-dust from the surface of the conveying means by rotating in contact with the conveying means.    
   
   
       2 . The sheet processing apparatus claimed in  claim 1 , wherein the conveying means includes a take-out roller to take out sheets by contacting a sheet at the most far end of plural sheets supplied, and the cleaning roller removes paper-dust from the take-out roller by contacting it.  
   
   
       3 . The sheet processing apparatus claimed in  claim 2 , wherein the conveying means includes a feed roller to feed sheets taken out by the take-out roller into the apparatus, and the cleaning roller removes paper-dust from the surface of the feed roller by rotating in contact with the feed roller.  
   
   
       4 . The sheet processing apparatus claimed in  claim 3 , wherein the conveying means includes a separation roller that is press contacted to the feed roller and is given with a rotational torque in the direction reverse to the sheet feeding direction to separate the sheets sent out by the feed roller one by one, and the cleaning roller removes paper-dust adhered on the surface of the separation roller through the feed roller.  
   
   
       5 . The sheet processing apparatus claimed in  claim 1 , wherein the conveying means includes a conveying roller and the cleaning roller removes paper-dust from the surface of the conveying roller by rotating while contacting the conveying roller.  
   
   
       6 . The sheet processing apparatus claimed in  claim 1 , wherein the conveying means includes a conveying belt and the cleaning roller removes paper-dust from the surface of the conveying belt by rotating while contacting the conveying belt.  
   
   
       7 . The sheet processing apparatus claimed in  claim 1 , wherein the porous material is a rubber sponge.  
   
   
       8 . The sheet processing apparatus claimed in  claim 7 , wherein a mean diameter of vesicles of the foamed rubber sponge is 50 to 500 μm.  
   
   
       9 . The sheet processing apparatus claimed in  claim 7 , wherein the rubber sponge is formed in a continuously foamed material.  
   
   
       10 . The sheet processing apparatus claimed in  claim 1 , wherein the cleaning roller is rotated jointly with the contacting conveying means at a velocity equal to or higher than a conveying velocity of the conveying means.  
   
   
       11 . The sheet processing apparatus claimed in  claim 1  further comprising: 
 a scraping plate provided by separating for a specified distance from the cleaning roller for limiting volume of paper-dust attached to the cleaning roller to a specified volume.