Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1982-11-23
1985-07-09
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
204 11, 204 15, G01D 1518
Patent
active
045285772
ABSTRACT:
An orifice plate is provided of an electroformed material which incorporates an integral ink distribution manifold and integral hydraulic separators between orifices. The general approach to the method of making the orifice plate is to first construct a two-part mandrel made up of a "hard" mandrel which can be reused many times and a "soft" mandrel which is renewed each time the mandrel is used. Typically, the surface of the "hard" mandrel is configured by mask and etch techniques, or by mask and electroplate techniques to define the ink distribution manifold and the hydraulic separators, while the "soft" mandrel is configured by mask and develop techniques to define the orifices and edges between orifice plates. Upon completion of the mandrel, its surface is electroplated with a relatively uniform thickness of metal, and the newly electroplated surface having the orifice plates patterned therein is separated from the mandrel.
REFERENCES:
patent: 4229265 (1980-10-01), Kenworthy
patent: 4246076 (1981-01-01), Gardner
patent: 4296421 (1981-10-01), Hara
patent: 4374707 (1983-02-01), Pollack
patent: 4412224 (1983-10-01), Sugitani
Cloutier Frank L.
Low Robert N.
McClelland Paul H.
Nielsen Niels J.
Hartary Joseph W.
Hewlett-Packard Co.
MacAllister William H.
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