Article: Japanese Inventors Develop Ink Jet Head Device

ALEXANDRIA, Va., Aug. 9 -- Yoshinori Mutoh of Yamatokoriyama, Japan and Kaoru Higuchi of Tenri, Japan have developed an ink-jet head device.

According to the U.S. Patent & Trademark Office: "In an ink-jet head device, a main tank, a sub tank and an ink-jet head are mounted in this order in a carriage, with the main tank placed at the top. The main tank, sub tank and ink-jet head are connected to one another by a three-way ink conduit. At a junction of the ink conduit is disposed a three-way switching valve, which selectively switch a path connecting the sub tank to the main tank and a path connecting the sub tank to the ink-jet head, without causing the ink-jet head and the main tank ...

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