Trans-thermo type color printer

Abstract

Abstract PURPOSE:To develop a stable contrast without increase in dot density of a thermal head, by thermally transferring white ink to color ink thermally transferred on a printing paper to mix colors. CONSTITUTION:This color printer is provided with a color ink thermal transfer mechanism 15 and a white ink thermal transfer mechanism 16 along the circumferential surface of a platen roll 10. Thermal heads 20 and 25 are equipped with (n) pieces each of heat generating elements linearly and with one energizing operation, one line of desired dots are thermally transferred onto a printing paper 12. This energizing operation and the line feed operation for feeding the printing paper 12 by one line in the direction A1 are repeated (m) times alternately to thermally transfer desired dots among those P1,1-Pm,n onto the printing paper 12 in the range of one screen as shown by the broken line F. In this case, dot patterns in desired colors are thermally transferred with a color thermal head 20 and desired white dot patterns are thermally transferred overlapping colored dot patterns with a white color thermal head 25.

Inventors

• 👤 Takahisa Oota
• 👤 太田　尭久
• 👤 Junji Kono
• 👤 順二 河野

Bibliographic Details