Abstract: A developing device includes: a first transport member and a second transport member that are disposed in a first transport path and a second transport path provided at an upper side and a lower side in a gravitational direction and that transport a developer. The developing device also includes an ejecting path that is provided in the first transport path disposed at the upper side in the gravitational direction and that ejects an excess developer. The developing device includes a reverse helical section that is disposed in front of a support that supports the second transport member. The reverse helical section helically extends in a reverse direction relative to a helical section provided for circulating the developer, the developer being transported to the ejecting path by the reverse helical section.

Abstract: A developing device includes: a case in which a hollow transporting path is formed; a transporting member configured to transport a developer in the transporting path; a support portion fixed to an end portion of the case by a fastening member to support the transporting member at an end portion of the transporting path; and a cooling unit fixed by being sandwiched between the support portion and the case.

Abstract: A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path. The developing device includes a developing device body in which the first transport path and the second transport path are formed. The developing device also includes a developer discharging structure that discharges excess developer discharged from the first transport path to outside through the second transport path or through a space between an end portion of the second transport path and the developing device body.

Abstract: A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing member that is disposed to face the first transport path and that receives the developer from the first transport path; and a driving device that operates such that a relative speed ratio between a rotational speed of the developing member and a rotational speed of the second transport member is changeable.

Abstract: A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing member that is disposed to face the first transport path and that receives the developer from the first transport path; and a third transport member that is disposed in a third transport path through which the developer that has not been used by the developing member is collected and transported to the second transport path. A central shaft of the second transport member is disposed farther in a vertically upward direction than is a central shaft of the third transport member.

Abstract: Provided is a developing device having a first transport member and a second transport member that are disposed in a first transport path and a second transport path provided at an upper side and a lower side in a gravitational direction. The transport members transport a developer so as to cause the developer to circulate between the first transport path and the second transport path. A partition wall that separates the first transport path and the second transport path from each other and has an opening including an open-close member that opens and closes the opening.

Abstract: A developing device includes: a first transport member and a second transport member that are disposed in a first transport path and a second transport path provided at an upper side and a lower side in a gravitational direction and that transport a developer so as to cause the developer to circulate between the first transport path and the second transport path; an ejecting mechanism that is provided in the first transport path disposed at the upper side in the gravitational direction and that ejects an excess developer; and a reverse helical section that is disposed in front of a support that supports the second transport member disposed at the lower side in the gravitational direction, the reverse helical section helically extending in a reverse direction relative to a helical section provided for circulating the developer, the developer being transported to the ejecting mechanism by the reverse helical section.

Abstract: A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing device body in which the first transport path and the second transport path are formed; and a developer discharging structure that discharges excess developer discharged from the first transport path to outside through the second transport path or through a space between an end portion of the second transport path and the developing device body.

Abstract: A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing member that is disposed to face the first transport path and that receives the developer from the first transport path; and a third transport member that is disposed in a third transport path through which the developer that has not been used by the developing member is collected and transported to the second transport path. A central shaft of the second transport member is disposed farther in a vertically upward direction than is a central shaft of the third transport member.

Abstract: A developing device includes: a case in which a hollow transporting path is formed; a transporting member configured to transport a developer in the transporting path; a support portion fixed to an end portion of the case by a fastening member to support the transporting member at an end portion of the transporting path; and a cooling unit fixed by being sandwiched between the support portion and the case.

Abstract: Provided is a developing device having a first transport member and a second transport member that are disposed in a first transport path and a second transport path provided at an upper side and a lower side in a gravitational direction. The transport members transport a developer so as to cause the developer to circulate between the first transport path and the second transport path. A partition wall that separates the first transport path and the second transport path from each other and has an opening including an open-close member that opens and closes the opening.

Abstract: A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing member that is disposed to face the first transport path and that receives the developer from the first transport path; and a driving device that operates such that a relative speed ratio between a rotational speed of the developing member and a rotational speed of the second transport member is changeable.

Abstract: A fixing device includes: a pair of pressure members that nip and apply pressure to a recording material having an unfixed image thereon; multiple pressure mechanisms that transmit a force to at least one of the pair of pressure members to generate the pressure; and multiple elastic members that apply elastic forces to a common portion in each pressure mechanism to generate the pressure.

Abstract: A rotary member support structure includes: a rotary member including a shaft; a bearing that rotatably supports the shaft of the rotary member; a pressing member that presses the bearing in one direction; and a support that supports the bearing such that the bearing is movable in a pressing direction of the pressing member. When the rotary member is not rotating, the bearing and the pressing member are in contact with each other such that the bearing is rotatable about the shaft.

Abstract: A developer supply device includes a container body that receives and contains a developer with which a toner cartridge is filled and that has a supply port used for supplying the developer, which is contained in the container body, to a developing device, a sensing member that detects the developer contained in the container body, a first transport member that is rotatably disposed in the container body and that transports the developer at a first transport speed by rotating, and a second transport member that is rotatably disposed in the container body in such a manner as to face the sensing member and that transports the developer at a second transport speed that is higher than the first transport speed by rotating.

Abstract: A rotatable-member-supporting structure includes a first rotatable member having a shaft portion, a bearing member by which the shaft portion of the first rotatable member is rotatably supported, a pressing member that presses the bearing member in one direction, and a supporting member by which the bearing member is supported in such a manner as to be retractably movable in the direction in which the pressing member presses the bearing member. A pressing force generated by the pressing member is greatest in a portion of the bearing member that is on a downstream side in a direction of rotation of the first rotatable member with respect to an intersection between the bearing member and a first virtual line extending from a center of rotation of the first rotatable member toward the pressing member in the direction in which the supporting member is retractably movable.

Abstract: A developer supply device includes a container body that receives and contains a developer with which a toner cartridge is filled and that has a supply port used for supplying the developer, which is contained in the container body, to a developing device, a sensing member that detects the developer contained in the container body, a first transport member that is rotatably disposed in the container body and that transports the developer at a first transport speed by rotating, and a second transport member that is rotatably disposed in the container body in such a manner as to face the sensing member and that transports the developer at a second transport speed that is higher than the first transport speed by rotating.

Abstract: A powder container includes a storing chamber that stores powder, a discharge path extending through a wall of the storing chamber and from which the powder is discharged, an inner wall that forms an inner surface of the wall and has an opening communicating with the discharge path, an outer wall that forms an outer surface of the wall and has an opening communicating with the discharge path, and an opening-and-closing member provided between the inner wall and the outer wall and that opens and closes the discharge path while moving along the inner wall and the outer wall.

Abstract: A developing device includes a rotary member delivering a developer to a latent image on an image carrier while rotating, a supply member disposed in a supply path and including a supply shaft and a helical or substantially helical supply blade, the supply member supplying the developer to the rotary member while rotating, a stirring member disposed in a stirring path, which extends alongside the supply path, and including a stirring shaft and a helical or substantially helical stirring blade, the stirring member stirring and circulating the developer between the supply and stirring paths while rotating, and an ejection path connected to an upstream portion of the supply path in a transport direction of the developer to eject the developer to the outside. The stirring blade's outer diameter is 1.1 or about 1.1 times or more and 1.5 or about 1.5 times or less the supply blade's outer diameter.

Abstract: A developing device includes a rotary member delivering a developer to a latent image on an image carrier while rotating, a supply member disposed in a supply path and including a supply shaft and a helical or substantially helical supply blade, the supply member supplying the developer to the rotary member while rotating, a stirring member disposed in a stirring path, which extends alongside the supply path, and including a stirring shaft and a helical or substantially helical stirring blade, the stirring member stirring and circulating the developer between the supply and stirring paths while rotating, and an ejection path connected to an upstream portion of the supply path in a transport direction of the developer to eject the developer to the outside. The stirring blade's outer diameter is 1.1 or about 1.1 times or more and 1.5 or about 1.5 times or less the supply blade's outer diameter.