Thermal transfer printing method

Details Thermal transfer printing method Thermal transfer printing method

1983-05-13

1985-01-08

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76PH, 400120, G01D 1510, G01D 1534, B41J 3518

Patent

active

044929650

ABSTRACT:
A thermal transfer printing method uses an ink donor medium sheet (12) having solid ink layers (11) whose optical reflection density is smaller than a maximum value of the optical reflection density of picture elements to be printed, and comprises the first step of printing the picture elements by moving a plain paper (4) as a record medium and the ink sheet (12) in a forward direction (FW) so that the solid ink layers are transferred onto the plain paper (4), the second step of moving the plain paper (4) in a backward direction (BW) and the third step of transferring the solid ink layers (11) in an overlapping manner onto the picture elements printed in the first step, by moving the plain paper (4) and the ink sheet (12) again in the forward direction (FW). In the first and third steps, the solid ink layers (11) are completely transferred onto the plain paper (4). The gradation of the picture elements is determined by the number of transfer times. Therefore, each picture element in the gradation can be printed in an extremely stable manner with good reproducibility.

REFERENCES:
patent: 2917996 (1959-12-01), Epstein et al.
patent: 3453648 (1969-07-01), Stegena
patent: 4365254 (1982-12-01), Ozawa et al.
patent: 4394092 (1983-07-01), Osmera et al.

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