Patent ID: 6179414
Filing Date: 2001-01-30
Classification: B41J

Abstract:
A printhead for an ink printer comprising:a nozzle member having a plurality of ink orifices formed therein, each orifice having an exit outlet with a given exit diameter D and having an ink passage with a predetermined length L, wherein a ratio of L/D is greater than unity;a substrate having a top surface and a first outer edge;a plurality of heating means formed on said top surface of said substrate, each of said heating means being located proximate to an associated one of said orifices for vaporizing a portion of ink and expelling said ink from said associated orifice through said ink passage to said exit outlet; anda fluid channel leading to each of said orifices and said heating means for communicating with an ink reservoir, said fluid channel allowing ink to flow around said first outer edge of said substrate and proximate to said orifices.