Patent ID: 6659600
Filing Date: 2003-12-09
Classification: B41J

Abstract:
An inkjet recording head cartridge, comprising:a substrate formed to have individual flow passages each having an ink emission orifice at one end thereof and an ink inflow orifice at another end thereof; an ink supply chamber communicating with the ink inflow orifices; and a heater face provided to be orthogonal to an ink emission face on which the ink orifices are formed, the heater face being part of a side surface of the ink supply chamber, wherein the ink supply chamber is formed to have a cross-sectional area allocated in an ink flow direction so that when ink is emitted from all the ink emission orifices, a buoyancy acting on a bubble occurring in the ink supply chamber, is larger than a drag produced by a flow velocity of ink that flows into the individual flow passages from the ink supply chamber, whereby the bubble moves away from the ink inflow orifices.