Post-processing apparatus and image forming system

Abstract

The post-processing apparatus obliquely disposed is provided with a stacker 21 to stack a recording sheet bundle S, a stopper 22 located at a lower end D of the stacker 21 and a blower section 3 disposed at the lower end D side of the stacker 21. The recording sheet bundle S is conveyed to the stacker 21 via a conveyance path a. The blower section 3 blows air towards a lower edge SD of the recording sheet sliding down on the stacking surface P of the stacker 21 from an upper end U side to the lower end D side of the stacker 21.

1 . A post-processing apparatus, comprising:
 a stacker obliquely disposed to stack a recording material bundle; and   a blower section disposed at a lower end side of the stacker to blow air from the lower end side to an upper end side of the stacker towards an edge section of a recording material being sliding down on a stacking surface of the stacker.   
     
     
         2 . The post-processing apparatus of  claim 1 , further comprising a stopper to contact with an edge section of the recording material bundle to be stacked on the stacking surface, wherein the blower section continues to blow air within a time period from when the recording material is conveyed to the stacker to at least when the edge section of the recording material comes in contact with the stopper. 
     
     
         3 . The post-processing apparatus of  claim 1 , further comprising a control section to control the blower section so as to blow air in a case when a recording material size exceeds a standard size. 
     
     
         4 . The post-processing apparatus of  claim 1 , further comprising a control section to control the blower section so as to blow air in accordance with type, basis weight, number or size of the recording material. 
     
     
         5 . The post-processing apparatus of  claim 1 , further comprising a push down member supported in a rotatable manner around an axis to push down a rear edge of the recording material to be conveyed to the stacker towards the stacking surface. 
     
     
         6 . The post-processing apparatus of  claim 1 , further comprising a post-processing section to apply post-processing to the recording material stacked on the stacker. 
     
     
         7 . An image forming system, comprising:
 an image forming apparatus to from an image on the recording material, and   the post processing apparatus of  claim 1  to convey the recording material, on which the image has been formed by the image forming apparatus, and to apply post-processing to the recording material.   
     
     
         8 . The image forming system of  claim 7 , further comprising a stopper to contact with the edge section of the recording material bundle to be stacked on the stacking surface, wherein the blower section continues to blow air within a time period from when the recording material is conveyed to the stacker to at least when the edge section of the recording material bundle comes in contact with the stopper. 
     
     
         9 . The image forming system of  claim 7 , further comprising a control section to control the blower section so as to blow air in case a recording material size exceeds a standard size. 
     
     
         10 . The image forming system of  claim 7 , further comprising a control section to control the blower section so as to blow air in accordance with type, basis weight, number or size of the recording material. 
     
     
         11 . The image forming system of  claim 7 , further comprising a push down member supported in a rotatable manner around an axis to push down a rear edge of the recording material to be conveyed to the stacker towards the stacking surface. 
     
     
         12 . The image forming system of  claim 7 , further comprising a post-processing section to apply post-processing to the recording material stacked on the stacker.