Ink jet head and ink jet recording apparatus

Details Ink jet head and ink jet recording apparatus Ink jet head and ink jet recording apparatus

2007-03-20

2007-03-20

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

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S054000

Reexamination Certificate

active

10752511

ABSTRACT:
An ink jet head includes: a pressure chamber that stores an ink and has an orifice; a filter plate including a through hole portion and a filter portion, the through hold portion disposed separately from the filter portion with a certain gap; a supply unit that supplies the ink through the filter portion to the pressure chamber; and a jetting unit that jets ink droplets through the orifice from the pressure chamber. The filter portion is formed to have a first aperture ratio. At least one through hole is formed on the through hole potion so that the filter portion has a second aperture ratio. The first aperture ratio is smaller than the second aperture ratio.

REFERENCES:
patent: 4864329 (1989-09-01), Kneezel et al.
patent: 5489930 (1996-02-01), Anderson
patent: 5610645 (1997-03-01), Moore et al.
patent: 6109738 (2000-08-01), Miyata et al.
patent: 6234623 (2001-05-01), Drake
patent: 6260957 (2001-07-01), Corley et al.
patent: 11-291514 (1999-10-01), None

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