Abstract: A toner accommodation container includes a toner containing portion for containing toner; a toner filling opening, formed in a side surface of said toner containing portion, for filling the toner into said toner containing portion; wherein said filling opening has a non-circular configuration substantially corresponding to a configuration of the side surface.

Abstract: A method of disassembling, for reuse, a toner accommodating container, including a main body for accommodating toner, an opening for permitting filling of the toner and a cap press-fitted with an engaging portion of the opening to plug the opening, the includes a first step of partly cutting the cap without cutting the engaging portion; and a second step of removing the cap from the engaging portion while releasing engagement between the cap and the engaging portion by deforming the cap using a cut portion provided by the cuttin step.

Abstract: A sealing member for sealing a developer accommodating portion for accommodating a developer includes (a) a sealing portion for openably sealing an opening of the developer accommodating portion; (b) an extended portion extending from the sealing portion, the extended portion having a width, measured in a direction of extension, which is smaller than that of the sealing portion; (c) a connecting edge for connecting an edge of the sealing portion adjacent the extended portion and a side edge of the extended portion extending in the direction of the extension; and (d) a tearable portion capable of being torn to open the opening sealed by the sealing portion, wherein an end of the tearable portion is provided in the sealing portion, and the other end thereof continues to the connecting edge, wherein the tearable portion extends between the one end and the other end substantially parallel with the extension direction.

Abstract: A developer accommodating container and a developing device that require less force to pull out a sealing member thereby to permit easier opening of the developer accommodating container.

Abstract: The present invention provides a seal member removing tool for removing a seal member fitted in a developing agent loading opening of a developing agent container, comprising a bent body portion, and an abutment portion provided on one end of the body portion and adapted to abut against the seal member from inside of the container to remove the seal member from the container. The present invention further provides seal member removing method effected by using such a seal member removing tool.