Patent ID: 7529502

Claim:
A cartridge that can be detachably mounted in an image-forming device, the cartridge comprising: a first wall; a second wall opposing the first wall with a gap formed therebetween, the first wall and the second wall defining therebetween a developer-accommodating section that accommodates a developer; and a reinforcing part spanning between the first wall and the second wall, wherein the developer-accommodating section has a discharge opening formed to discharge developer; the developer-accommodating section has a fill through-hole that is configured to introduce developer into the developer-accommodating section; the reinforcing part is positioned downstream from the fill through-hole and upstream from the discharge opening along a direction that developer is discharged through the discharge opening; and the reinforcing part has a guiding surface on an upstream part of the reinforcing part with respect to the direction that developer is discharged through the discharge opening to guide the developer downstream in the discharging direction.