US Patent 7717547 Inkjet head

An inkjet head includes a flow path unit and a reservoir unit. The reservoir unit stores ink and includes an ink flow path, a reservoir flow path and an ink drop flow path. The reservoir flow path includes a main flow path formed with plural tributary communication ports, and plural tributary flow paths. A section area of the main flow path taken along a width direction of the reservoir unit is larger than each of section areas of the tributary flow paths taken along a direction perpendicular to a flow direction of ink. The ink drop flow path drops ink onto a substantially center of the main flow path as viewed in a plan view. The tributary communication ports are substantially equal to each other in an opening area.