Method and apparatus for printing an image

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

1985-08-28

1986-11-18

Evans, A.

Recorders

Thermal recording

346139C, 219543, 400120, 358298, G01D 1510

Patent

active

046239014

ABSTRACT:
A printing head comprises a substrate, a plurality of printing elements disposed on the substrate and adapted to print a picture element of an image, and a driving device for selectively driving the printing elements. Each of the printing elements includes a plurality of ring-shaped printing segments disposed on the substrate concentrically to each other. The printed area in the picture element is changed according to the printing segments selectively driven by the driving device and thus the gradation of the printed image is expressed by changing the printed area in a picture element.

REFERENCES:
patent: 3736406 (1973-05-01), Vossen et al.
patent: 4067017 (1978-01-01), Dertouzos et al.
patent: 4378566 (1983-03-01), Tsukamura
patent: 4427985 (1984-01-01), Kikuchi et al.

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