We just need heat and pressure. To generate pressure we can simply apply a transfer press. This only does the work for flat products like the front printed wallet cases. We attach the design to the cases and place the wallet cases, up to four cases at once, in the oven. When everything is in position, the pump starts pressing the design onto the products making the paper with the prints melt at the cases. Because of the high pressure, the design is kept in place firmly.