Incremental printing of symbolic information – Thermal marking apparatus or processes
Patent
1994-01-31
1997-01-07
Tran, Huan H.
Incremental printing of symbolic information
Thermal marking apparatus or processes
347217, 347224, B41J 2325, B41J 2435
Patent
active
055922082
ABSTRACT:
An ink sheet (3) is wound around rollers (6), and a recording sheet (4) is placed with a space (d) between the ink sheet (3) and the recording sheet (4) and is advanced. The thickness of the space (d) is a value in the range of 1 to 100 .mu.m. The ink sheet (3) is irradiated with a laser beam (L) emitted by a laser (5) to transfer the dye contained in a dye layer formed on the ink sheet (3) from the ink sheet (3) to the recording sheet (4) for printing. The dye layer of the ink sheet (3) is replenished with the dye (30, 30A) heated and fused by a heater (9) by a dye supply unit (7) at a position other than a position where the ink sheet (3) is irradiated with the laser beam (L). Since the ink sheet and the recording sheet are held with the space (d) having a thickness in the range of 1 to 100 .mu.m, the dye once transferred to the recording sheet is not transferred from the recording sheet to the ink sheet, so that a clear picture having a comparatively high density can be printed. Since the dye layer of the ink sheet is replenished with the dye, the ink sheet can be repeatedly used, so that no waste is produced.
REFERENCES:
patent: 3978247 (1976-08-01), Braudy et al.
patent: 4414555 (1983-11-01), Becker
patent: 4598302 (1986-07-01), Swidler et al.
patent: 4772582 (1988-09-01), DeBoer
patent: 4976986 (1990-12-01), Akutsu et al.
Asai Nobutoshi
Hirano Hideki
Kawasumi Koichi
Ogata Masanori
Sato Shuji
Sony Corporation
Tran Huan H.
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