Patent ID: 7953330

Claim:
A cartridge comprising: an engagement gear comprising a first engaging portion and a first surface extending perpendicular to an axis of rotation of the engagement gear, wherein the engagement gear is configured to selectively rotate; a rotational body comprising a second engaging portion and a second surface which extends perpendicular to an axis of rotation of the rotational body and faces the first surface, wherein a center axis of the rotational body is aligned with a center axis of the engagement gear; and an extension portion which is positioned offset from a center of rotation of the rotational body, wherein the engagement gear and the rotational body are configured to selectively shift between a first state in which the second engaging portion and the first engaging portion are separated from each other, and a second state in which the second engaging portion engages the first engaging portion, wherein the rotational body is configured to rotate with the engagement gear when the engagement gear rotates and the engagement gear and the rotational body are in the second state, and wherein the first engaging portion is positioned on the first surface, and the second engaging portion is positioned on the second surface.