Ink jet recording head containing a sealed fluid for protecting

Details Ink jet recording head containing a sealed fluid for protecting Ink jet recording head containing a sealed fluid for protecting

1998-03-02

2000-08-29

Braun, Fred L.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2045

Patent

active

061097365

ABSTRACT:
An ink jet recording head is provided with a piezoelectric vibrator. The piezoelectric vibrator includes a diaphragm and a piezoelectric active part. The diaphragm includes a pressure generating chamber communicating with a nozzle aperture, at least the upper surface of which acts as a lower electrode. The piezoelectric active part includes a piezoelectric film formed on the surface of the diaphragm and an upper electrode formed on the surface of the piezoelectric film, formed in an area opposite to the pressure generating chamber. A cap member is bonded on one side of the piezoelectric film for sealing a space with a holder to the extent that the motion is secured. The piezoelectric active part is cut off from the outside of the head by sealing dry fluid in the space of the cap member.

REFERENCES:
patent: 5754205 (1998-05-01), Miyata et al.
patent: 5861902 (1999-01-01), Beerling
patent: 5912684 (1999-06-01), Fujii et al.

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