The geometry of conventional flat printheads requires that the ribbon remain in contact with the receptor for some distance after the melt. By the time the ribbon can be pulled away from the receptor, the wax/resin will be somewhat solidified. To make sure that it transfers 100%, it is required that it be completely solidified. This essentially requires a cooling time, which limits the speed of the printer. Solid peel-off also limits the choice of receptors to those to which the wax / resin will bond more strongly than it bonds to the ribbon substrate.
With the Kyocera corner edge printhead, the ribbon substrate is immediately separated from the liquid wax / resin. The extremely fast performance of Kyocera corner edge printheads certainly comes from their high print energy, small glaze volume, history control and straight paper path. But it also comes from very quick ribbons, which are enabled by the quick peel-off geometry. Once a liquid peel-off can be assumed, a new class of resins can be used that will adhere to receptors which could not previously be thermally printed.