Device for detecting the quantity of remaining developer

Details Device for detecting the quantity of remaining developer Device for detecting the quantity of remaining developer

1974-07-08

1976-04-20

Reeves, Robert B.

Dispensing

Automatic control

Material level control

200 6120, 222160, 222DIG1, 335205, B65D 8306

Patent

active

039513092

ABSTRACT:
A device for detecting the quantity of remaining developer comprises a non-magnetic container for magnetic developer formed with a lower discharge port, a magnet disposed outside and adjacent the bottom of the container for producing a magnetic attraction between the magnet and the magnetism of the developer within the container, a rotary screw roller or a rotary impeller for delivering the developer from the container through the discharge port thereof, a mechanism for causing relative movement of the magnet and the container away from each other against the magnetic attraction when the developer is below a predetermined quantity, and a switch operable by such relative movement.

REFERENCES:
patent: 1892790 (1933-01-01), Smelser
patent: 2555513 (1951-06-01), Schweitzer
patent: 2612299 (1952-09-01), McCabe

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