Patent ID: 8041256

Claim:
A tandem photosensitive-drum unit comprising: a first side plate having a first hole and a second hole; a second side plate; a front beam connecting a front end of the first side plate and a front end of the second side plate; a rear beam connecting a rear end of the first side plate and a rear end of the second side plate; a first photosensitive drum disposed between the first side plate and the second side plate; a second photosensitive drum disposed between the first side plate and the second side plate; a first developing roller and a first coupling having a first receiving portion for receiving driving force for driving the first developing roller, the first developing roller and the first coupling disposed between the first side plate and the second side plate; a second developing roller and a second coupling having a second receiving portion for receiving driving force for driving the second developing roller, the second developing roller and the second coupling disposed between the first side plate and the second side plate; a first grip part on the front beam; and a second grip part on the rear beam, wherein all of the first receiving portion is exposed via the first hole, wherein all of the second receiving portion is exposed via the second hole, and wherein the first grip part is connected to the front beam via hinge.