Patent ID: 7488058

Claim:
A method of manufacturing an ink container for containing ink to be supplied to an ink jet type recording head that has nozzles to eject the ink, said ink container comprising a case body having an ink outlet formed through its bottom, and a top lid for closing an open top of said case body, wherein said case body is partitioned by a partition wall into a negative pressure generator chamber containing a negative pressure generator that absorbs and holds the ink by its capillary force and keeps pressure inside said nozzles negative to atmospheric pressure while said ink outlet is connected to said recording head, and a storage chamber containing an air-tight ink bag that stores the ink and has an ink spout connected to said negative pressure generator chamber through an ink port formed through said partition wall, and wherein said top lid has a first air introduction hole for introducing air into said negative pressure generator chamber, and a second air introduction hole for introducing air into said storage chamber, said manufacturing method comprising steps of: connecting said ink spout of said ink bag to said ink port, to attach said ink bag to said partition wall; mounting said partition wall with said ink bag in said case body, to partition said case body into said negative pressure generator chamber and said storage chamber; placing said negative pressure generator in said negative pressure generator chamber; fixing said top lid to said case body; and filling said negative pressure generator chamber and said ink bag with the ink.