Ink jet print head having heater upper surface coplanar with a s

Details Ink jet print head having heater upper surface coplanar with a s Ink jet print head having heater upper surface coplanar with a s

1999-06-17

2000-12-12

Barlow, John

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 62, B41S 205

Patent

active

061588458

ABSTRACT:
Apparatus for controlling ink in an ink jet printer includes a print head of the type wherein ink forms a meniscus above a nozzle bore and spreads along an upper surface of the print head. The print head includes a substrate having an upper surface; an ink delivery channel below the substrate; and a nozzle bore through the substrate and opening below the substrate into the ink delivery channel to establish an ink flow path. A source of pressurized ink communicates with the ink delivery channel such that ink tends to form a meniscus on the upper surface of the heater. A resistive heater lies about at least a portion of the nozzle bore, the heater having an upper surface which is coplanar with a surrounding portion of the upper surface of the substrate, whereby the print head is flat in regions along an ink-to-solid contact line of the meniscus.

REFERENCES:
patent: 1941001 (1933-12-01), Hansell
patent: 3878519 (1975-04-01), Eaton
patent: 4490728 (1984-12-01), Vaught et al.
patent: 5726693 (1998-03-01), Sharma et al.
patent: 5812159 (1998-09-01), Anagnostopoulos et al.
patent: 5825385 (1998-10-01), Siberbrook
patent: 5880759 (1999-03-01), Silverbrook

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