Patent ID: 8027615

Claim:
A process unit comprising: a unit frame configured to be installable to an image forming apparatus by sliding in a predetermined direction, the unit frame including: a first side plate and a second side plate, the first side plate having through-holes, and a front beam and a rear beam, the front beam having a front-side grip and the rear beam having a rear-end grip, wherein a distance from an upper end of the front beam to an upper end of the front-side grip is smaller than a distance from an upper end of the rear beam to an upper end of the rear grip; and a plurality of cartridges disposed between the first side plate and the second side plate and detachably installable to the unit frame, each of the plurality of cartridges having: a developing roller rotatable about an axis; and a coupling gear for receiving a driving force to rotate the developing roller, the coupling gear being exposed outside via the through-hole.