Self cleaning imaging material dispensing system

摘要

Described herein is a reproduction apparatus imaging material dispensing system having a replaceable and rotatable imaging material dispensing container (14) from which an at least partially magnetically attractable consumable imaging material (12) is dispensed. An optical imaging material level sensing system (20) is mounted outside of the container (14) for optically detecting the imaging material (12) inside the container (14) through translucent walls (14a) thereof and signaling an insufficient remaining quantity of imaging material. A magnetic brush cleaning system (12a, 30) internally cleans imaging material (12) from the inside of a annular translucent wall area (14a) of the container (14) to provide and maintain relatively unobstructed such optical sensing. The magnetic brush cleaning system comprises a stationary magnet (30) mounted outside of but adjacent to the container (14) to attract magnetically attractable imaging material to the inside of the container wall to form a magnetic cleaning brush (12a) to clean the translucent wall annular area (14a). This allows a light receiving sensor (24) on one side of the container (14) to detecting light from a light emitter (22) on the other side of the container through the magnetically cleaned translucent annular band (14a). The magnet (30) can extend substantially the full length of the outside of the container to clean the entire interior thereof.