| 摘要 |
This invention provides a metering blade that confronts the developer roller of a toner cartridge with a working face and associated upstream corner that is accurately controlled with respect to the developer roller to achieve a desired gap therebetween. More particularly, the quality of toner metering is determined through an appropriate technique (such as analysis of print quality) and the angle of the bottom working face and working corner is varied using appropriate computer-controlled machining (or other metal-forming) techniques to adjust the location of the corner with respect to the radial center-line of the roller at all points along the axial direction. In an illustrative embodiment, the blade's working face is formed to create a setback that is compound angle in two orthogonal directions (with respect the lengthwise direction, parallel to the roller axis). This compound angle reorients the upstream corner of the working face to compensate for irregular metering and electrostatic differences across the roller surface (in the axial direction), particularly where toner is greater on one side of the roller than the other, opposing side. In production, a standard setback profile can be used for further cartridges in the production run.
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