| 摘要 |
The device is improved so that the toner tub may be installed only when a toner color of the developing unit and the toner tub coincide in mounting the toner tub of a cartridge system into the developing unit. The device characterizes that numerous numbers of guide rails are formed on a cover inner side of a leading entrance the toner tub is mounted; a cut-off film capable of blocking the leading entrance side of the guide rail, formed so as to be removed in a necessary cut-off film according to a use; numerous of flutes are formed on a toner outlet side of a toner supplying entrance and projections of a cap are inserted into the flutes of the toner tub; and in mounting the toner tub in the leading entrance, only the toner tub the projections coincide is slid and mounted in the position the cut-off film is removed.
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