US 5,517,285 AGranted

Developing apparatus in which the developer cartridge or the toner cartridge is mountable

AssigneeKabushiki Kaisha Toshiba

InventorsSusumu Nomura, Kozo Matsuyama

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Abstract

According to an image forming apparatus of the present invention, a developer filling opening is formed in an end of a casing which is provided with a developer-filled section, a holder section is arranged round the developer filling opening to hold a developer cartridge, guides are arranged adjacent to the developer cartridge holder section to guide the developer cartridge to the developer cartridge holder section when it is inserted into a developing unit from one side thereof, and the developer cartridge is attached to the developer cartridge holder section, when the developer-filled section with developer D in the developer cartridge, said developer consisting of toner T and carrier C mixed at a predetermined rate. The filling of developer or toner can be therefore more easily and quickly achieved without detaching the developing unit from the image forming apparatus. In addition, the developer and toner cartridges can be more easily and quickly attached to the developing unit from one side thereof when viewed in the horizontal direction.

Claims7

Dependent claims

An image forming apparatus wherein a developer, including a toner and a carrier, is charged from a developer cartridge and a replenishment toner is supplied from a toner cartridge after charging of the developer, comprising:

developer receiving means for receiving the developer charged from the developer cartridge;
a first opening section, provided on the developer receiving means and having a first opening, for allowing the developer to be received into the developer receiving means from the developer cartridge;
first supporting means for detachably supporting the developer cartridge so as to set a charge port of the developer cartridge on the first opening section;
a second opening section, provided on the developer receiving means and having a second opening, for allowing the toner to be received into the developer receiving means from the toner cartridge;
second supporting means for detachably supporting the toner cartridge so as to set a supply port of the toner cartridge on the second opening section;
and
covering means, pivotally mounted on the first opening section and rotated between first and second positions, for allowing the first opening to be opened and preventing the toner cartridge from being mounted on the second supporting means when the covering means is set in the first position, and for covering the first opening and allowing the toner cartridge to be mounted on the second supporting means when the covering means is set in the second position.

4 more elements

Dependencies are inferred from the claim text.