Patent ID: 6132033
Filing Date: 2000-10-17
Classification: B41J

Abstract:
An ink jet print head comprising:a substrate defining an elongated ink aperture and having a major surface;a plurality of ink energizing elements disposed on the major surface of the substrate;a barrier layer connected to the major surface, peripherally defining an elongated ink manifold, and encompassing the ink aperture;an orifice plate connected to the barrier layer, spaced apart from the substrate major surface, enclosing the ink manifold, and defining a plurality of orifices, each associated with a respective ink energizing element, the ink manifold being an elongated chamber having opposed ends defined by end wall portions of the barrier layer;the barrier end wall portions each having an intermediate end wall portion protruding into the manifold; andat least first and second columnar structures of predetermined diameters spaced apart at predetermined distances from each other, extending substantially orthogonally from said major surface of the substrate to said orifice plate.