Patent ID: 7778578

Claim:
A toner bottle rotatable along a direction of a rotation axis of the toner bottle, comprising: a bottle body elongated along the rotation axis of the toner bottle which contains toner, the bottle body having a first portion and a second portion along the rotation axis, a diameter of the second portion being smaller than a diameter of the first portion; a toner supply port provided at the second portion; a helical groove formed on a periphery of the bottle body to move toner from an end portion of the toner bottle towards the toner supply port; a shutter slidable along the rotation axis to open and close the toner supply port; a protrusion formed on a circumferential surface of the second portion; a cylindrical surface portion formed on a rear side of the protrusion and having a predetermined length along the rotational axis, wherein a diameter of the cylindrical surface portion is largest within the second portion along the rotation axis, wherein a height of the protrusion is smaller than the diameter of the first portion, a protruded member formed on an end face of the second portion for engaging with a driving device of an image forming apparatus; and a step portion provided between the protruded member and an outermost part of the second portion in diameter enveloping the protruded member, the step portion having a height that is higher than an end of the cylindrical surface and lower than the outermost part of the second portion.