초록 ▼

This invention provides an improved ink flow path between an ink reservoir and vaporization chambers in an inkjet printhead. In the preferred embodiment, a barrier layer containing ink channels and vaporization chambers is located between a rectangular substrate and a nozzle member containing an arr

This invention provides an improved ink flow path between an ink reservoir and vaporization chambers in an inkjet printhead. In the preferred embodiment, a barrier layer containing ink channels and vaporization chambers is located between a rectangular substrate and a nozzle member containing an array of orifices. The substrate contains two linear arrays of heater elements, and each orifice in the nozzle member is associated with a vaporization chamber and heater element. The ink channels in the barrier layer have ink entrances generally running along two opposite edges of the substrate so that ink flowing around the edge of the substrate gain access to the ink channels and to the vaporization chambers.

대표청구항 ▼

[ What is claimed is:] [1.] 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 uni

[ What is claimed is:] [1.] 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 vaporizinga 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.