Ink furnishing unit in an ink jet recorder

Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means

Reexamination Certificate

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Details

C347S092000, C347S017000

Reexamination Certificate

active

07824023

ABSTRACT:
It is desirable that the entire ink to be furnished to the nozzle head be deaerated efficiently, the entire ink including a portion of ink recovered from the purge section.Accordingly, an ink furnishing unit in an ink jet recorder is provided, which comprises a back pressure tank15connected to a nozzle head2via an ink supply passage, a main tank9connected to the back pressure tank via a main supply passage16provided with a main ink pump18therein, a recovery tank7connected to the main tank via a return passage provided with an ink pump22therein, and a purge cap5connected to the recovery tank via a recovery passage8provided with a purge pump6therein, the purge cap being opposed to the nozzle head when purging, wherein a deaerator17is disposed in the main supply passage connecting the main tank and the back pressure tank and the back pressure tank is connected to an upstream of the purge pump in the recovery passage via a three way directional control valve30.

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patent: WO 01/72522 (2001-10-01), None

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