Patent ID: 7822357

Claim:
A developing apparatus comprising: a photoconductor; a photoconductor frame part to support the photoconductor; a developing roller to develop a latent image formed on the photoconductor by supplying a developer; a developing roller frame part to support the developing roller, the developing roller frame part including a developer storing part to store the developer and provided with a supplying opening through which the developer is supplied to the developing roller, wherein the developing roller frame part is rotatably coupled to the photoconductor frame part via a hinge part; an insertion opening defined by a portion of the photoconductor frame part and a portion of the developing roller frame part; a frame insertion member removably insertable in the insertion opening; a leakage preventer removably attached to and sealing the supplying opening; and a connecting part to connect the frame insertion member with the leakage preventer, wherein the insertion opening increases in size from a smaller size, when the frame insertion member is removed from the insertion opening, to a larger size, when the frame insertion member is inserted in the insertion opening, wherein the photoconductor and the developing roller are maintained in a non- operational separated state while the frame insertion member remains in the insertion opening, wherein the frame insertion member is first removed from the insertion opening and the leakage preventer is then removed from the supplying opening while the non-operational separated state is changed to an operation state.