Intermec PB31 User Manual page 27

Chapter 1 — Using the PB21 and PB31 Mobile Receipt Printer
2 Insert a roll of media. Make sure you load the media clockwise so
that it pulls off the core from the bottom of the printer.
3 Pull out 8 cm (3 in) of the media, and then close the media cover.
4 Press the Feed button to advance the media.
PB21 and PB31 Mobile Receipt Printer User Guide 15