Ink ribbon for sublimation transfer type hard copy

Details Ink ribbon for sublimation transfer type hard copy Ink ribbon for sublimation transfer type hard copy

1985-06-17

1987-05-19

Sewell, Paul T.

Typewriting machines

Including interposed inking device for record-medium

Ribbon, per se

346 76PH, 400120, B41J 3105

Patent

active

046663207

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

1. Technical Field
The present invention relates to an ink ribbon for a sublimation transfer type hard copy used to produce a hard copy of a still picture image such as a picture image taken by a video camera, a television picture image and so on.
2. Background Art
FIG. 1 shows an example of a prior art printer for a sublimation transfer type hard copy. This printer comprises a platen 2 having wound therearound a printing paper 1 and which is rotatable in the direction shown by an arrow a and a thermal print head 4 which is urged against the platen across an ink ribbon 3 for use in thermal transfer recording. On the point of the thermal print head 4, there are arranged heat generating elements 4a whose total number corresponds to the number of picture elements in one scanning line of, for example, a television picture image.
The ink ribbon 3 for use in thermal transfer recording tightly pressed between the thermal print head 4 and the printing paper 1 is formed of a film base 9 on which, for example, an yellow ink layer Y, a magenta ink layer M, a cyan ink layer C and a black ink layer B each having a configuration corresponding to a configuration of a picture screen of a television picture image are repeatedly arranged in turn. Further, ink portion position detecting marks 5Y, 5M, 5C and 5B are respectively formed on one side edge of the film base at the positions of the corresponding color ink portions so as to detect the positions of the ink portions and a block position detecting mark 6 is formed on the other side edge of the film base so as to detect each combination group of four colors of Y, M, C and B.
Under the condition that the yellow ink layer Y, for example, is urged against the printing paper 1 as described above, by an information corresponding to yellow, for example, a color signal corresponding to yellow of a television video signal, each head element 4a of the thermal print head 4 is heated with a pattern corresponding to the picture elements of one scanning line to thereby thermally transfer the yellow sublimation dye contained in the yellow ink layer Y to the printing paper 1 in accordance with the heated pattern. At every line corresponding to each scanning line, the platen 2 is intermittently rotated in the direction shown by the arrow a to thereby carry out the thermal transfer of information of each line. When the platen 2 is rotated one turn, the yellow color of one picture screen amount is transferred. Then, a similar transfer treatment is carried out with respect to the magenta color and subsequently, the cyan color and the black color are sequentially transferred repeatedly to thereby superpose the transferred picture images of the sublimation dyes of the yellow, magenta, cyan and black sublimation dyes one over another, thus a color picture image being printed on the printing paper. In this case, detecting means are provided to detect the marks 5 (5Y, 5M, 5C and 5B) and 6 in the ink layers Y, M, C and B of respective colors for the purpose of supplying the signals corresponding to the respective color signals to the head elements 4a of the thermal print head 4. This detecting means includes, for example, a light source 7 for emitting a light ray for use in detection, for example, an infrared ray emitting diode and a detecting element 8 for detecting the infrared ray in which case, both of them are disposed in opposing relation to each other at both sides of the ink ribbon 3 for use in thermal transfer recording at which the marks 5 and 6 are provided. In the detecting means, the detecting element 8 produces a detected signal dependent on the presence or absence of the marks 5 and 6 whereby to detect the positional relation of the ink ribbon 3 for use in thermal transfer recording relative to the thermal print head 4.
As the ink ribbon for such sublimation transfer type hard copy, there is used in the art one formed on a film base 9 made of a paper such as a condenser paper, which is thin, uniform and dense, and a coating layer made of an ink in which a sublimation

REFERENCES:
patent: 4269892 (1981-05-01), Shattuck
patent: 4309117 (1982-01-01), Chang
patent: 4427985 (1984-01-01), Kikuchi
patent: 4453839 (1984-06-01), Findlay
patent: 4459055 (1984-07-01), Asakura
patent: 4461586 (1984-07-01), Kawanishi
patent: 4465389 (1984-08-01), Knirsch
patent: 4527171 (1985-07-01), Takanashi
patent: 4572684 (1986-02-01), Sato

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