Ink printing apparatus and ink jet head unit

摘要

The present invention provides an ink-jet print head (600,601,602,603) comprising a plurality of heater boards (100) as unit substrates which are connected to each other and each of which has a plurality of discharge means arranged therein so that the nonuniformity of density which is produced in portions of the image printed by the head corresponding to boundaries (B) between the respective heater boards is decreased. Since a plurality of ink-jet heads (600,601,601,603) are disposed so that the boundaries (B) between respective heater boards (100) of the heads are not overlapped one another, the nonuniformity of density at the boundaries (B) can be decreased, not increased by interrelation between the heads. <MATH>