Ink-jet type recording head

Incremental printing of symbolic information – Ink jet – Ejector mechanism

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Details

347 54, B41J 2045, B41J 204

Patent

active

058961500

ABSTRACT:
In an ink-jet type recording head including a nozzle plate provided with nozzle openings, a spacer provided with partitions for partitioning pressure generating chambers, ink supply ports and reservoirs, and a plate member sandwiched and fixed together. Displacement of the plate member is produced by piezoelectric vibrators to thereby generate ink droplets. The spacer is formed by anisotropic etching of a silicon single crystal substrate so that the pressure generating chambers, the ink supply ports and the reservoirs are formed as through-holes communicated with each other. Accordingly, etching conditions for the respective through-holes are made equal to each other. In different embodiments, the spacer includes chamfered portions or a plurality of fine planes and steps along which adhesive spreads during assembly of the head. In a further embodiment, the spacer includes different length partitions are between the pressure generating chambers.

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patent: 4666823 (1987-05-01), Yokota et al.
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