| 摘要 |
An orifice plate cleaning system having a source of solvent, an elongate orifice plate having a plurality of orifices therethrough and an elongate plate face composed of a solvent-wettable material and oriented to be inclined downwardly from the horizontal, and a solvent conduit for depositing solvent at an upper end of the plate face so that solvent flows downwardly by gravity to wet the plate face completely and remove dried ink deposits therefrom. The system includes a vacuum tube adjacent a lower end of the plate face to remove the solvent containing dissolved ink from it. In preferred embodiments, the plate face includes sharply-defined, opposing longitudinal edges which prevent the solvent from running off of the orifice plate, a side plate having a surface made of a solvent-wettable material which abuts an upper longitudinal edge of the plate face so that it is wetted by a solvent flowing along the orifice plate, a second side plate made of a non-solvent-wettable material abutting a lower longitudinal edge of the orifice plate, or a support plate for supporting the orifice plate and made of a non-solvent-wettable material, all acting to prevent the solvent from running off of the plate face of the orifice plate to other print head components during a cleaning operation.
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