Faster print speed for on demand type card printing is one of the strong requirements from the printer user. And, it must include graphic quality to describe the full color photograph for ID card using dye diffusion thermal transfer method.To achieve these requirements, there are obstacles to be solved. One of those is the ribbon wrinkle. When print speed is increased, friction between heater of thermal printhead and the back coat of transfer ribbon will be bigger. As a result, ribbon wrinkles much easier compared to regular speed. To reduce it, printhead heater construction has been improved. As a result, wrinkle could be eliminated.
Hidekazu Akamatsu, Naoto Matsukubo, Daisaku Katoh, Takashi Aso, Akihiro Fukami, "Development of high speed real edge printhead for card printer" in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP24), 2008, pp 829 - 832, https://doi.org/10.2352/ISSN.2169-4451.2008.24.1.art00093_2