Thermal transfer type color printer

Details Thermal transfer type color printer Thermal transfer type color printer

1988-12-09

1991-05-21

Fuller, Benjamin R.

Recorders

Thermal recording

226 27, 226 76, 400616, 400618, 400228, 4002403, 346136, G01D 1524, B41J 1524, G03B 124

Patent

active

050179438

ABSTRACT:
In a thermal transfer type color printer, an ink film on which plural color inks are sequentially painted in its longitudinal direction is sequentially transported forward between an ink film supply roll and winding roll, while a printing paper is repeatedly transported forward and backward in order to print out a color image by overlapping plural color inks. In color printing, the printing paper and ink film are partially overlapped and wound around a platen roller, and a thermal head is pressed against the platen roller by sandwiching the ink film and printing paper therebetween so that the thermal head transfers the color inks on the printing paper. In order to prevent wrinkles from being formed on the ink film, tension applying means applies tension force to the ink film by temporarily controlling or stopping revolution of the ink film supply roll. In addition, such tension force is also applied while the printing paper is transported backward, so that printing start position of each color ink is accurately coincided with printing position of the thermal head. Thus, a desirable color image can be printed out without color dislocation and without forming un-transferred portions thereof.

REFERENCES:
patent: 4551729 (1985-11-01), Kubo et al.
patent: 4552470 (1985-11-01), Yana et al.
patent: 4621756 (1986-11-01), Bullock et al.

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