The controller judges whether or not a time interval of two sheets discharged consecutively exceeds the first time interval, and judges that the sheets loaded onto the tray up to {HEAD ~ a height} not lower than the reference position, when the time interval of the two sheets exceeds {TAIL ~ the first time interval}, and when the signal transmission mechanism continues to transmit the second signal exceeding the first time interval 
The controller judges whether or not a time interval of two sheets discharged consecutively exceeds the first time interval , and judges that the sheets loaded onto the tray up to { HEAD ~ a height } not lower than the reference position , when the time interval of the two sheets exceeds { TAIL ~ the first time interval } , and when the signal transmission mechanism continues to transmit the second signal exceeding the first time interval
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH