Patent ID: 6217158
Filing Date: 2001-04-17
Classification: B41J,H01L

Abstract:
A layered type ink jet recording head comprising:at least one actuator unit and at least one ink supply unit coupled together;said actuator unit including:an elastic plate, made of piezoelectric material, having a first common electrode formed on a first side of said elastic plate and a at least one drive electrode formed in a deformable region on a second side of said elastic plate;a spacer having a first side which is directly sealingly covered by said elastic plate; and a second covering member which sealingly covers a second side of said spacer, said spacer having a hollow interior, said spacer along with said elastic plate and said second covering member, defining a pressure generating chamber, said drive electrode being disposed within said deformable region and above said pressure generating chamber, said second covering member including a first through hole which connects said pressure generating chamber to a first portion of said ink supply unit and a second through-hole which connects said pressure generating chamber to a second portion of said ink supply unit;wherein said first portion of said ink supply unit includes a common ink chamber and an ink supply port which connects said first through hole to said common ink chamber;wherein said second portion of said ink supply unit includes a discharge orifice and an ink discharge through-hole which connects said second through-hole to said discharge orifice of said second portion which receives ink from said pressure generating chamber in order to discharge an ink droplet, said ink originating in said common ink chamber; andwherein said deformable region of said elastic plate includes at least one curved portion which faces said pressure generating chamber.