Self-cleaning printer with reverse fluid flow and ultrasonics and method of assembling the printer. The printer comprises a print head defining a plurality of ink channels therein, each ink channel terminating in an ink ejection orifice. The print head also has a surface thereon surrounding all the orifices....http://www.google.es/patents/US6183057?utm_source=gb-gplus-sharePatente US6183057 - Self-cleaning ink jet printer having ultrasonics with reverse flow and method of assembling same
Self-cleaning ink jet printer having ultrasonics with reverse flow and ...
