| CPC G03G 21/12 (2013.01) [G03G 21/105 (2013.01); G03G 2221/1624 (2013.01)] | 16 Claims |

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1. An apparatus, comprising:
an exterior cover to open and close, the exterior cover being a mount part of the apparatus; and
a powder collection container to be attachable to and detachable from the exterior cover, to store powder, the powder collection container including:
a plurality of walls that form a storage space to store the powder, the plurality of walls including:
a first wall to face the exterior cover; and
a second wall not to face the exterior cover,
wherein a thickness of the first wall is smaller than a thickness of the second wall.
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