| 摘要 |
PURPOSE:To secure the sufficient capacity of a recovery box equipped with a photosensor at an upper position, and prevent erroneous detection of the photosensor and recover toner with high efficiency and high reliability by providing a toner discharge port to the toner recovery box below the photosensor. CONSTITUTION:Toner recovered from the surface of a photosensitive body is sent in the recovery box 31 through the discharge port T of a screw conveyor 2. The photosensor consisting of a light emitting element 4a and a photodetecting element 4b is arranged at the upper end part of the recovery box 31 and there is no disturbance until the toner storage space of the recovery box 31 is filled with toner, so delivery and receipt of a light beam C is maintained, and the light beam C ic cut off when the space becomes full of the toner. Therefore, the capacity of the recovery box 31 is secured sufficiently, the erroneous detection of sensors 4a and 4b is evaded and toner is recovered while the efficiency and reliability are improved. |
