Provided is a wall mountable printer with a glue applicator assembly operatively applying adhesive to a vertical edge of a sheet of printed paper. The printer has a binder assembly including an enclosure chassis, and a powered spike wheel assembly configured to receive the sheet of paper from a print engine of the printer. Also included is an angled platen within the chassis on which the sheet is received from the spike wheel assembly, and a binding platen operatively actuated to bind the sheet onto a preceding sheet positioned on the angled platen. The binder assembly includes a paper sensor to sense a position of bound sheets on the angled platen to facilitate accurate binding of successive sheets.