Ink jet recording head cartridge

Details Ink jet recording head cartridge Ink jet recording head cartridge

2006-07-04

2006-07-04

Vo, Anh T.N. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

Reexamination Certificate

active

07070266

ABSTRACT:
An ink jet recording head cartridge has a liquid container for retaining a liquid, a discharge circuit section which comprises a supply port for receiving the liquid in the liquid container, a nozzle in communication with the supply port, and a discharge energy generating element, provided in the nozzle, for discharging the liquid; and a flow path for leading the liquid from the liquid container to the discharge circuit section, wherein the flow path comprises a vertical portion extending from a portion connecting to the ink container, and a horizontal portion connecting to a lower end of the vertical portion and connecting to the supply port of the discharge circuit section, a throttle portion whose width becomes narrower in a supply direction of the liquid is formed in a portion, which connects to the vertical portion, of the horizontal portion of the flow path, and a groove shaped flow path whose width is narrower than the total width of the flow path is contiguously formed on an inner wall of the flow path from a portion connecting to the liquid container to a portion connecting to the discharge circuit section.

REFERENCES:
patent: 4368478 (1983-01-01), Koto
patent: 4998120 (1991-03-01), Koto et al.
patent: 5812165 (1998-09-01), Boyd et al.
patent: 6783220 (2004-08-01), Ujita et al.

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