- 专利标题： Toner level detection measuring an orientation of a rotatable magnet having a varying orientation relative to a pivot axis
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申请号： US16041075申请日： 2018-07-20
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公开(公告)号： US10451997B1公开(公告)日： 2019-10-22
- 发明人: Michael Craig Leemhuis , Gary Allen Denton
- 申请人： LEXMARK INTERNATIONAL, INC.
- 申请人地址： US KY Lexington
- 专利权人： Lexmark International, Inc.
- 当前专利权人： Lexmark International, Inc.
- 当前专利权人地址： US KY Lexington
- 主分类号： G03G15/10
- IPC分类号： G03G15/10 ; G03G15/08
摘要：
A toner level detection assembly for an electrophotographic image forming device according to one example embodiment includes a magnet connected to a rotatable shaft and rotatable with the shaft around an axis of rotation of the shaft. The magnet is pivotable independent of the shaft about a pivot axis that is spaced radially from the axis of rotation. A magnetic sensor is positioned to sense a magnetic field of the magnet at a point in a rotational path of the magnet and is configured to measure an orientation of the magnetic field of the magnet at the point in the rotational path of the magnet. Processing circuitry in communication with the magnetic sensor is configured to determine an estimate of an amount of toner in a toner reservoir correlating with the measured orientation of the magnetic field of the magnet at the point in the rotational path of the magnet.
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