Heating device for heating the ink in the printing head of an in

Details Heating device for heating the ink in the printing head of an in Heating device for heating the ink in the printing head of an in

1991-06-14

1993-03-02

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 205

Patent

active

051913607

ABSTRACT:
A heating device for heating of ink in a print head of an ink print device comprises several ink channels ending in exit openings (10). The ink channels (8) are connected to a joint ink volume space (9), with individually controllable electrothermal converter elements (3) coordinated to each separate ink channel (8), where under the effect of the converter elements (3) a droplet-wise ejection of ink occurs from the exit openings (10). The print head is constructed in a layer structure. A further cover layer (14) is applied onto the uppermost cover layer (2, 3, 4, 5, 6) of a substrate (1), delimiting the ink volume space (9) and the ink channels (8) and containing the electrothermal converter elements (3) where the further cover layer (14) serves both as a heating layer for heating the ink and as a temperature sensor layer for determinating the temperature of the ink. The cover layer (14) is contactable from the outside and is covered by a further protective layer (13). The cover layer (14) is extending over a large area of the region of the ink volume space (9).

REFERENCES:
patent: 4719472 (1988-01-01), Arakawa
patent: 4899180 (1990-02-01), Elhatem
patent: 4910528 (1990-03-01), Firl
patent: 5095321 (1992-03-01), Saito

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