Ink path geometry for high temperature operation of ink-jet prin

Details Ink path geometry for high temperature operation of ink-jet prin Ink path geometry for high temperature operation of ink-jet prin

1992-04-28

1993-12-28

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

106 20D, B41J 221, B41J 205

Patent

active

052744000

ABSTRACT:
The effects of heating on a printhead (16) used in a thermal ink-jet printer (10) provided with a heating means (30) to assist in drying ink on a print medium (12) are compensated for by making adjustments in the geometry, or architecture, of the printhead. Specifically, the dimensions of two portions of the structure for a cyan printhead are adjusted to provide more fluidic drag, first, by increasing the channel damping, and second, by increasing the shelf damping. The channel damping is increased by altering the dimensions of the ink-feed channel (48) leading towards the nozzle (42)/resistor (44) area, or firing chamber (50), specifically, by both lengthening and narrowing the ink feed channel. The shelf damping is increased by increasing that portion (52) between the edge (54a) of the ink refill slot (54) and the entrance to the ink feed channel. This increase in shelf length is most easily achieved by decreasing the width of the associated ink refill slot.

REFERENCES:
patent: 4380771 (1983-04-01), Takatori
patent: 4505749 (1985-03-01), Kanekiyo
patent: 4683481 (1987-07-01), Johnson
patent: 4882595 (1989-11-01), Trueba
patent: 4914562 (1990-04-01), Abe
patent: 5026426 (1991-06-01), Russell
patent: 5108504 (1992-04-01), Johnson

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