Patent ID: 9256160
Filing Date: 2016-02-09
CPC Classification: G03G

Claim Text:
1. A developer storage container, comprising: a main body portion with a cylindrical inner peripheral surface and a pair of main body side end surfaces arranged at opposite ends of the inner peripheral surface, an internal space of the main body portion being defined by the inner peripheral surface and the pair of main body side end surfaces; a rotary cylindrical body with a side surface having a cylindrical shape, a pair of rotary body end surfaces arranged at opposite ends of the side surface, a pair of rotary shafts arranged on the rotary body end surfaces and a storage space defined by an inner surface of the side surface and the pair of rotary body end surfaces and configured to store developer; wherein: a slit extending in a circumferential direction is formed on the side surface of the rotary cylindrical body to allow communication between the internal space and the storage space, the rotary cylindrical body is so arranged in the internal space that a predetermined clearance is defined between the side surface and the inner peripheral surface of the main body portion, and rotatably supported on the pair of main body side end surfaces with the rotary shafts, a developer discharge port which communicates with the internal space and from which the developer is discharged is opened on the main body portion, the slit is inclined on the side surface from one end side of the rotary shaft in an axial direction toward the developer discharge port and a plurality of slits are arranged at intervals in the axial direction, the developer in the storage space is conveyed in a conveying direction toward the developer discharge port with the rotation of the slits about the rotary shaft, and an opening width of the slits in the axial direction is set to be smaller than a width of the side surface between adjacent slits in the axial direction.