Inkjet recording head having dynamic vibration absorber

Details Inkjet recording head having dynamic vibration absorber Inkjet recording head having dynamic vibration absorber

2005-07-13

2009-02-24

Matthew, Luu (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S094000

Reexamination Certificate

active

07494210

ABSTRACT:
An inkjet recording head includes a base member, an ink channel unit, a plurality of piezoelectric elements, and a dynamic vibration absorber. The ink channel unit is formed with a plurality of nozzle holes and a plurality of ink pressure chambers. The ink channel unit includes a diaphragm that defines part of each ink pressure chamber. Each piezoelectric element has one end fixed to the base member and another end attached to the diaphragm. Each piezoelectric element generates displacement in a displacement direction for deforming the diaphragm to eject ink droplets through a corresponding one of the plurality of nozzle holes. The dynamic vibration absorber is mounted on the base member for damping vibrations of the base member due to a resonance, the resonance occurring in a frequency range less than or equal to a predetermined frequency.

REFERENCES:
patent: 3786202 (1974-01-01), Schafft
patent: 5541630 (1996-07-01), Ema et al.
patent: 6478411 (2002-11-01), Kitahara
patent: 02081637 (1990-03-01), None
patent: 06206310 (1994-07-01), None
patent: 6-270403 (1994-09-01), None
patent: 2002-361868 (2002-12-01), None

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