Recorders – Thermal recording
Patent
1984-05-07
1985-12-10
Goldberg, E. A.
Recorders
Thermal recording
250548, 400241, 4002403, 346106, B41J 3516
Patent
active
045583293
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to an ink carrier ribbon for thermal-transfer recording capable of printing as a hard copy a still picture of various images such as a picture image picked up by, for example, a video camera, a television picture image or the like and particularly to an ink carrier ribbon for sublimation transfer type hard copy which can produce, for example, a color hard copy by transferring a sublimation dye from the ink carrier ribbon to a printing paper.
2. Background Art
An outline of such a sublimation transfer type color hard copy system will be described with reference to FIG. 1. In this case, a printing paper 1 is wrapped around a platen 2 which rotates in the direction shown by an arrow a, while a thermal print head 4 is disposed so as to press an ink carrier ribbon 3 for thermal transfer printing against the platen. Heating elements 4a the number of which corresponds to the number of picture elements in one scanning line of, for example, a television picture are arrayed, on the tip end of the thermal print head 4.
The ink carrier ribbon 3 closely pressed between the thermal print head 4 and the printing paper 1 is formed of, for example, as shown in FIG. 2, a sheet-like base material 9 and ink portions each containing sublimation dyes of yellow, magenta, cyan and black, or ink portions each containing sublimation dye of yellow Y, magenta M, cyan C and black B, each ink portion having a configuration corresponding to that of a picture screen of a television picture and being repeatedly arranged in turn on the base material. In this case, ink portion position detecting marks 5Y, 5M, 5C and 5B of respective colors used for detecting the positions of the respective color ink portions are formed on one corresponding side edges of the respective ink portions and a block position detecting mark 6 is formed on the other side edge to detect the ink portions of each group, namely, a combined block of adjoining ink portions Y, M, C and B.
Under the condition that the ink portion Y, for example, is pressed against the printing paper 1, on the basis of information signal corresponding to yellow, for example, a color signal corresponding to yellow of a television video signal, respective head elements 4a of the head 4 are heated with a pattern corresponding to the picture elements of one scanning line so that the yellow sublimation dye on the ink portion Y is thermally transferred to the printing paper 1 in accordance with the heated pattern. As described above, the platen 2 is intermittently rotated along the arrow a at every line corresponding to each scanning line to thermally transfer the information of each line, and the yellow sublimation dye of one picture amount is transferred by one revolution of the platen 2. As to the magenta M, the similar transfer process is carried out and as to the cyan C and the black B the similar transfer thereof are repeatedly carried out to thereby sequentially superpose the transferred images of the sublimation dyes of yellow Y, magenta M, cyan C and black B, whereby a color image is produced on the printing paper. In this case, there are provided detecting means for detecting the marks 5(5Y, 5M, 5C and 5B) and 6 so as to allow the signals corresponding to the respective color signals in the ink portions Y, M, C and B to be supplied to the head elements 4a of the head 4. The detecting means is formed of, for example, as shown in FIG. 1 a light source 7 for detective light rays, for example, infrared light ray emission diode and a photo detector 8 for detecting the detective light rays, which are disposed on the both sides of the ink carrier ribbon 3 at which the marks 5 and 6 are formed in correspondence thereto. On the basis of the presence or absence of the marks 5 and 6, the detected signals are developed from the detector 8 whereby to detect the position of the ink carrier ribbon 3 relative to the thermal print head 4.
The marks 5 and 6 in the ink carrier ribbon 3 used in such transfer system may be formed of, for example,
REFERENCES:
patent: 4219737 (1980-08-01), Gagnon et al.
Evans A.
Goldberg E. A.
Sony Corporation
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