Orifice plate for simplified ink jet head

Details Orifice plate for simplified ink jet head Orifice plate for simplified ink jet head

1995-06-02

1997-06-17

Hartary, Joseph W.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 214

Patent

active

056401841

ABSTRACT:
In the embodiments of the simplified ink jet head described in the specification an orifice plate has specially profiled orifice openings to assure axial projection of drops when ink is supplied from an asymmetric ink path leading to the orifice. For this purpose the orifice includes cylindrical ink inlet and outlet portions with the ink outlet portion having a smaller diameter and a shorter length than the inlet portion and a tapered conical portion joining the ink inlet portion and the ink outlet portion. Preferably, the diameter of the inlet portion is no more than about twice the diameter of the outlet portion.

REFERENCES:
patent: 4184925 (1980-01-01), Kenworthy
patent: 4209794 (1980-06-01), Kattner
patent: 4422082 (1983-12-01), Louzil
patent: 4954225 (1990-09-01), Bakewell
patent: 5087930 (1992-02-01), Roy et al.

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