Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1990-08-03
1992-06-09
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
B41J 205
Patent
active
051211432
ABSTRACT:
This invention relates to an ink jet printing head comprising in combination: a thermal head member having at least one thermal element consisting of a plurality of thermal dot elements, a guide member having ink-supplied grooves contacting the thermal elements and being moved reciprocatingly, and a plurality of electrodes of different widths connected to each thermal element, whereby different-sized heated portions of the thermal element are obtainable, and it is possible to vary the amount of ink jetted in one dot. For a ratio of 1:3 for the widths of the electrodes (corresponding to the widths of the heated portions) in one dot, 16 printing density levels (16.times.4) can be obtained by printing four times for one dot. By combining four dots it is possible to obtain 64 printing density levels (16.times.4). The thermal dot elements can be arranged in either a zigzag pattern or in a continuous straight form.
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patent: 4558330 (1985-12-01), Iizuka
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patent: 4731621 (1988-03-01), Hayamizu
patent: 4746935 (1988-05-01), Allen
patent: 4803499 (1989-02-01), Hayamizu
patent: 4965594 (1990-10-01), Komuro
Graphtec Corp.
Hartary Joseph W.
Soartec Corp.
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