Method and apparatus for printing an image

Details Method and apparatus for printing an image Method and apparatus for printing an image

1985-09-23

1987-01-27

Evans, Arthur G.

Recorders

Thermal recording

346106, 358298, 400120, G01D 1510

Patent

active

046397426

ABSTRACT:
A thermal printer comprises a thermal printing head to heat an ink ribbon overlapping a printing sheet. The ink ribbon is coated with thermally transferable colorants and transfer ratio regulating materials. First, the transfer ratio regulating materials are transferred onto the printing sheet by heating the ink ribbon, and then the colorants are transferred according to an image to be printed. The colorants are thus thermally transferred onto the printing sheet in accordance with the amount and range of transferred regulating materials. The material operates to reduce or promote the transfer of colorants. Thus, a multi-gradation expression of the printed image may be achieved by changing the transferred amount of the transfer rate regulating materials.

REFERENCES:
patent: 2616961 (1952-11-01), Groak
patent: 4527171 (1985-07-01), Takahashi et al.

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