Patent ID: 6877835
Filing Date: 2005-04-12
Classification: B41J

Abstract:
1. A method of filling a buffer portion in a print head with at least one bubble, using a print head comprising a plurality of ejection openings through which ink is ejected, a plurality of channels that are each in communication with a corresponding one of the plurality of ejection openings, a common liquid chamber for supplying ink to the plurality of channels, a buffer portion located at an end of an arrangement direction of said channels and adjoining, in the arrangement direction of said channels, at least one of said channels in communication with at least one corresponding ejection opening to restrain vibration of ink in said common liquid chamber which occurs as a result of ejection of the ink, and bubble generating means for filling the buffer portion with at least one bubble, comprising the steps of: filling said buffer portion with the at least one bubble by driving said bubble generating means; and executing a recovery process of discharging the ink through said ejection openings after said bubble filling step, wherein in said recovery process step, excess of the at least one bubble filled in said buffer portion is removed; wherein during said bubble filling step, the at least one bubble is allowed to grow up to a location immediately adjacent to said at least one channel adjoining said buffer portion by driving said bubble generating means.