Sheet processing apparatus

Abstract

The present invention provides a sheet processing apparatus comprising a sheet holding device capable of storing supplied sheets, a first sheet stacking tray on which sheets are stacked at a downstream side of the sheet holding device in a sheet conveying direction and on which the sheets are subjected to processing, a sheet discharging device for discharging the sheets stacked on the first sheet stacking tray, a second sheet stacking tray on which the sheets discharged by the sheet discharging device are stacked, and a controller for controlling the sheet discharging device and the sheet holding device if sheet jam occurs at an upstream side of the sheet holding device, in such a manner that, after the sheets on the first sheet stacking tray are discharged onto the second sheet stacking tray, the sheets stored in the sheet holding device are discharged onto the first sheet stacking tray.

What is claimed is:  
     
         1 . A sheet processing apparatus comprising: 
 a sheet holding device capable of storing supplied sheets;    a first sheet stacking tray on which sheets are stacked at a downstream side of said sheet holding device in a sheet conveying direction and on which the sheets are subjected to processing;    a sheet discharging device for discharging the sheets stacked on said first sheet stacking tray;    a second sheet stacking tray on which the sheets discharged by said sheet discharging device are stacked; and    a controller for controlling said sheet discharging device and said sheet holding device when a succeeding sheet is not supplied to said sheet holding device for a predetermined time, in such a manner that, after the sheets on said first sheet stacking tray are discharged onto said second sheet stacking tray, the sheets stored in said sheet holding device are discharged onto said first sheet stacking tray.    
     
     
         2 . A sheet processing.apparatus comprising: 
 a sheet holding device capable of storing supplied sheets;    a first sheet stacking tray on which sheets stored by said sheet holding device or sheets passed without stopping at said sheet holding device are stacked and on which the sheets are subjected to processing;    a second sheet stacking tray on which the sheets discharged from said first sheet stacking tray are stacked;    a sheet conveying device for conveying the sheets stored in said sheet holding device and the sheets stacked on said first sheet stacking tray together and for stacking the sheets stored in said sheet holding device onto said first sheet stacking tray after the sheet stacked on said first sheet stacking tray are discharged onto said second sheet stacking tray; and    a controller for controlling said sheet conveying device when a succeeding sheet is not supplied to said sheet holding device for a predetermined time, in such a manner that the sheets stacked on said first sheet stacking tray are discharged onto said second sheet stacking tray and the sheets stored in said sheet holding device are stacked onto said first sheet stacking tray.    
     
     
         3 . A sheet processing apparatus comprising: 
 a sheet holding device capable of storing supplied sheets;    a first sheet stacking tray on which sheets stored by said sheet holding-device or sheets passed without stopping at said sheet holding device are stacked and on which the sheets are subjected to processing;    a first sheet conveying device capable of conveying the sheets stacked on said first sheet stacking tray by a predetermined amount at a downstream side of the sheets stored in said sheet holding device;    a second sheet stacking tray on which the sheets discharged from said first sheet stacking tray are stacked;    a second sheet conveying device for conveying the sheets stacked on said first sheet stacking tray and the sheets stored in said sheet holding device together after the sheets stacked on said first sheet stacking tray are conveyed by said first sheet conveying device by the predetermined amount at the downstream side and for discharging the sheets stacked on said first sheet stacking tray onto said second sheet stacking tray and for stacking the sheets stored in said sheet holding device onto said first sheet stacking tray; and    a controller for controlling said sheet holding device and said second sheet conveying device when a succeeding sheet is not supplied to said sheet holding device for a predetermined time, in such a manner that the sheets stacked on said first sheet stacking tray are discharged onto said second sheet stacking tray and the sheets stored in said sheet holding device are stacked onto said first sheet stacking tray.    
     
     
         4 . A sheet processing apparatus comprising: 
 a sheet holding device capable of storing supplied sheets;    a first sheet stacking tray on which sheets are stacked at a downstream side of said sheet holding device in a sheet conveying direction and on which the sheets are subjected to processing;    a sheet discharging device for discharging the sheets stacked on said first sheet stacking tray;    a second sheet stacking tray on which the sheets discharged by said sheet discharging device are stacked; and    a controller for controlling said sheet discharging device and said sheet holding device if sheet jam occurs at an upstream side of said sheet holding device, in such a manner that, after the sheets on said first sheet stacking tray are discharged onto said second sheet stacking tray, the sheets stored in said sheet holding device are discharged onto said first sheet stacking tray.    
     
     
         5 . A sheet processing apparatus comprising: 
 a sheet holding device capable of storing supplied sheets;    a first sheet stacking tray on which sheets stored by said sheet holding device or sheets passed without stopping at said sheet holding device are stacked and on which the sheets are subjected to processing;    a second sheet stacking tray on which the sheets discharged from said first sheet stacking tray are stacked;    a sheet conveying device for conveying the sheets stored in said sheet holding device and the sheets stacked on said first sheet stacking tray together and for stacking the sheets stored in said sheet holding device onto said first sheet stacking tray after the sheet stacked on said first sheet stacking tray are discharged onto said second sheet stacking tray; and    a controller for controlling said sheet conveying device if sheet jam occurs at an upstream side of said sheet holding device, in such a manner that the sheets stacked on said first sheet stacking tray are discharged onto said second sheet stacking tray and the sheets stored in said sheet holding device are stacked onto said first sheet stacking tray.    
     
     
         6 . A sheet processing apparatus comprising: 
 a sheet holding device capable of storing supplied sheets;    a first sheet stacking tray on which sheets stored by said sheet holding device or sheets passed without stopping at said sheet holding device are stacked and on which the sheets are subjected to processing;    a first sheet conveying device capable of conveying the sheets stacked on said first sheet stacking tray by a predetermined amount at a downstream side of the sheets stored in said sheet holding device;    a second sheet stacking tray on which the sheets discharged from said first sheet stacking tray are stacked;    a second sheet conveying device for conveying the sheets stacked on said first sheet stacking tray and the sheets stored in said sheet holding device together after the sheets stacked on said first sheet stacking tray are conveyed by said first sheet conveying device by the predetermined amount at the downstream side and for discharging the sheets stacked on said first sheet stacking tray onto said second sheet stacking tray and for stacking the sheets stored in said sheet holding device onto said first sheet stacking tray; and    a controller for controlling said sheet holding device and said second sheet conveying device if sheet jam occurs at an upstream side of said sheet holding device, in such a manner that the sheets stacked on said first sheet stacking tray are discharged onto said second sheet stacking tray and the sheets stored in said sheet holding device are stacked onto said first sheet stacking tray.