Epson TM-S2000 Series Technical Reference Manual page 22

When ejecting into the sub pocket (only for two-pocket models)
When the two-pocket model receives a command to eject the document into the sub pocket, the
processing slows down because it feeds the cut sheet paper backward to the pocket switching
position and ejects it into the sub pocket.
<First document>
Fed from the ASF
Check for double feeding
MICR reading
Ink jet printing
Capturing image on both sides
Stop of paper feeding*
Backward paper feeding*
Switching of the pockets
Ejection of the document
1
* Waits for a command from the
application.
2
* Occurs depending on some
conditions.
22
1
2
<Second document>
Fed from the ASF
Check for double feeding
Switching of the pockets
Ejection of the document
<Third document>
Fed from the ASF