Patent ID: 7711293

Claim:
A toner container comprising: a cylindrical toner storing portion to be filled with toner; a toner loading portion formed at a first end of the toner container and having a toner loading opening from which toner is loaded into the toner storing portion; a cap element which is able to hermetically close and open the toner loading opening; a toner discharge port for discharging the toner stored in the toner storing portion out of the container, wherein the toner discharge port is formed on a second end that is opposite to the first end where the toner loading portion of the toner container is formed, the toner discharge port being formed on an end wall of the cylindrical toner storing portion that is oriented substantially perpendicular to a central longitudinal axis of the cylindrical toner storing portion, and wherein the toner discharge port is sealed by a sealing element bonded from without; and a holder that encloses the outer periphery of the second end where the toner discharge port is formed and rotatably holds the toner container, wherein the holder, when it encloses the second end of the toner container, has an inner wall portion located opposing the toner discharge port, characterized in that: the cap element is constructed so as to enclose the toner loading opening, wherein the cap element includes female threads so that the cap element can be fastened by screw-fitting to the toner loading portion, and wherein the cap element includes, as an engaging portion with the toner loading portion, a first projection capable of limiting the rotation of the cap element in a loosening direction, the first projection being located adjacent a terminal end of the female threads; and wherein the toner loading portion includes male threads that engage the female threads on the cap element, and wherein the toner loading portion includes, as an engaging portion with the cap element, a second projection engaging the first projection and capable of limiting the rotation of the cap element in the loosening direction, the second projection being located adjacent a beginning end of the male threads.