Method of multi-tone printing

Details Method of multi-tone printing Method of multi-tone printing

1990-10-09

1994-11-01

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 43, 347 69, B41J 2205, B41J 2045

Patent

active

053610849

ABSTRACT:
A method of multi-tone printing employs a drop-on-demand printing apparatus for depositing ink droplets on printing element areas of a substrate which is movable relatively to the apparatus. The droplets are deposited from an array of channels on the substrate which is movable relatively to the channels. The channels length and nozzle location and dimensions afford each channel with a high longitudinal resonant frequency and energy pulses are supplied to selected channels at or near the resonant frequency of the channels to deposit from each selected channel in the corresponding printing element area of the substrate a number of drops equal to the number of pulses applied thereto, the number of pulses applied being dependent on the tone of printing required. Single channel and color versions of the invention are also disclosed.

REFERENCES:
patent: 4513299 (1985-04-01), Lee et al.
patent: 4536097 (1985-08-01), Nilsson
patent: 4746935 (1988-05-01), Allen
patent: 4873535 (1989-10-01), Sasaki
patent: 4887100 (1989-12-01), Michaelis et al.
patent: 4908635 (1990-03-01), Iwasawa et al.
patent: 5016028 (1991-05-01), Temple

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