Epson H6000III - TM Two-color Thermal Line Technical Reference Manual page 106

The direction
the paper has
been fed
(reverse).
5. Endorsement printing has been done.
The direction the paper
has been fed (forward).
40 mm or more
7. Surface printing has been done.
The area for the reverse printing is limited; therefore when
setting the print area for single-pass processing, be sure to
note that the printing on the surface cannot be done
within 40 mm (typical) from the bottom of the paper.
7-2 Application Development for Image Scanner
Endorsement
head
6. Print position for the surface printing is completed.
Print head
9. Image scanning has been done.
The direction
the paper has
been fed
(reverse).
The direction the
paper has been fed
(forward).
Print head
Image scanner
Rev. E