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TONER LEVEL SENSOR Disclosure Number: IPCOM000024271D
Original Publication Date: 1980-Feb-29
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


The figure shows a toner level sensor which may be part of the top cover of the toner hopper and which can signal the operator when and how much toner to add to the hopper. Alternatively, the device may be used to generate an electrical signal lighting up a control panel light. The toner sensor comprises a float 1 which rides on the top of the toner level lj. in the toner hopper. The float is fixed to shaft 2 which has one spiral flute 6 in its surface which is connected to the signal wheel 3 in the top 5 of the sensor. The float rides on the toner and as the level of toner in the hopper diminishes, the float lowers and the spiral movement of the shaft to the signal wheel moves the signal wheel to tell the operator how much toner is present in the hopper.