Abstract: An image forming apparatus, includes: plural image forming units each including an image holding member and configured to form an image that is to be transferred to a recording medium on the image holding member using a dry toner, the number of the plural image forming units being at least five; and plural developing devices each of which is provided in each of the plural image forming units and supplied with the dry toner and a dry carrier, each of the plural developing devices including a dry toner adhering unit that has a length equal to or longer than a length of a long side of an A3 size and to which the dry toner adheres, the dry toner adhering unit being configured to cause the dry toner adhering to the dry toner adhering unit to adhere to the image holding member.

Abstract: An image forming apparatus includes a black image carrier that holds toner images of black, a yellow image carrier that holds toner images of yellow, a magenta image carrier that holds toner images of magenta, a cyan image carrier that holds toner images of cyan, at least one spot-color image carrier, and multiple collecting units. The at least one spot-color image carrier holds toner images of a spot color other than black, yellow, magenta, and cyan. Each of the collecting units collects waste toner. The collecting units include a first collecting unit that collects waste toner removed from the black image carrier, and waste toner removed from the spot-color image carrier.

Abstract: An image forming apparatus includes a black image carrier that holds toner images of black, a yellow image carrier that holds toner images of yellow, a magenta image carrier that holds toner images of magenta, a cyan image carrier that holds toner images of cyan, at least one spot-color image carrier, and multiple collecting units. The at least one spot-color image carrier holds toner images of a spot color other than black, yellow, magenta, and cyan. Each of the collecting units collects waste toner. The collecting units include a first collecting unit that collects waste toner removed from the black image carrier, and waste toner removed from the spot-color image carrier.

Abstract: A developer supply device includes: a toner storage part that can be attached to/removed from a body of the developer supply device and stores toner therein; a toner supply part that receives the toner from the toner storage part and supplies the toner to a developing device that develops an electrostatic latent image formed on an image carrier with developer containing the toner and carrier; a carrier storage part that can be attached to/removed from the body and stores the carrier therein; and a carrier supply part that receives the carrier from the carrier storage part and supplies the carrier to the developing device, the carrier supply part having a smaller capacity than the toner supply part.

Abstract: A powder-container attachment device includes a powder container that accommodates powder, and a device body. The device body includes an attachment portion to and from which the powder container is attached and removed with a pushing operation and a pull-out operation, a receiving port, a lid that is moved in interconnection with the pushing operation and the pull-out operation to open and close the receiving port, and an engaging portion with which the lid is engaged in the state of closing the receiving port. The powder container includes a protrusion and a disengagement portion. The lid includes a holding portion that removably holds the protrusion, and an engaged portion that is engaged with the engaging portion during the pull-out operation. The powder container is movable in a direction in which the protrusion moves away from the disengagement portion during the pull-out operation.

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 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 container for powder detachably mountable to an image forming apparatus body includes a discharge channel and a wall member. The discharge channel has an upper end. Powder is discharged through the discharge channel. The wall member is disposed such that a gap is formed between the wall member and the upper end of the discharge channel. A transport part that transports the powder toward the discharge channel is provided in the container.

Abstract: A container for powder detachably mountable to an image forming apparatus body includes a discharge channel and a wall member. The discharge channel has an upper end. Powder is discharged through the discharge channel. The wall member is disposed such that a gap is formed between the wall member and the upper end of the discharge channel. A transport part that transports the powder toward the discharge channel is provided in the container.

Abstract: A developer vessel includes a container that includes a discharge port through which developer is discharged, and a transport portion that rotates to transport the developer toward the discharge port, a first protrusion that protrudes from an outer surface of the container, a second protrusion that protrudes from the outer surface at a position on an opposite side to the first protrusion with a virtual line being interposed between the first and second protrusions, the virtual line passing through a rotational axis of the transport portion and on a plane perpendicular to the rotational axis of the transport portion and being parallel to the discharge port, and an extending portion that is disposed at an outer end of each of the first and second protrusions on the plane and that extends in a direction intersecting with the respective first and second protrusions.

Abstract: A developer vessel includes a container that includes a discharge port through which developer is discharged, and a transport portion that rotates to transport the developer toward the discharge port, a first protrusion that protrudes from an outer surface of the container, a second protrusion that protrudes from the outer surface at a position on an opposite side to the first protrusion with a virtual line being interposed between the first and second protrusions, the virtual line passing through a rotational axis of the transport portion and on a plane perpendicular to the rotational axis of the transport portion and being parallel to the discharge port, and an extending portion that is disposed at an outer end of each of the first and second protrusions on the plane and that extends in a direction intersecting with the respective first and second protrusions.

Abstract: Provided is a powder containing device including a powder container that contains powder, that has a first end which is closed, that has a second end which is opened, that includes a main body section and a tapered section which is disposed on the second end side from the main body section and has a diameter reduced as close to the second end side, and that has an inner circumferential surface on which a protruding ridge is formed to convey the powder to the second end side by rotating around a rotation axis extending in a direction in which the first end and the second end is connected, and a lid member that is provided with an outlet of the powder, is maintained in a non-rotating state, and causes the powder flowing from the opening to flow out from the outlet.

Abstract: An image forming apparatus includes an accommodation container, a storage medium, and a controller. The accommodation container includes a rotational portion and outflow portion. The rotational portion accommodates a developer therein and has a helical-shaped transport section formed in an inner surface thereof. The outflow portion rotatably supports the rotational portion and has an outflow port through which the developer transported during rotation of the rotational portion flows out. The storage medium stores use state information of the developer accommodated in the rotational portion. The controller controls a driving source which drives the rotational portion. When a use state of the accommodation container for the developer is a use state which is set in advance, the controller intermittently drives the rotational portion by performing driving at a rotation angle of (n+½)?±18 degrees or less than 90 degrees and stopping.

Abstract: A container for developer detachably mountable to an image forming apparatus body includes a container body, a discharge member, a resistive member, and a resistance reduction mechanism. The container body contains developer and is rotated when drive is transmitted from the image forming apparatus body. The discharge member supports the container body rotatable relative to the discharge member and has a discharge port through which the developer is discharged. The resistive member is brought into contact with the container body so as to apply resistance to the rotation of the container body. The resistance reduction mechanism changes a contact state between the resistive member and the container body so as to reduce the resistance between the resistive member and the container body when the container is mounted to the image forming apparatus body.

Abstract: An image forming apparatus includes an accommodation container, a storage medium, and a controller. The accommodation container includes a rotational portion and outflow portion. The rotational portion accommodates a developer therein and has a helical-shaped transport section formed in an inner surface thereof. The outflow portion rotatably supports the rotational portion and has an outflow port through which the developer transported during rotation of the rotational portion flows out. The storage medium stores use state information of the developer accommodated in the rotational portion. The controller controls a driving source which drives the rotational portion. When a use state of the accommodation container for the developer is a use state which is set in advance, the controller intermittently drives the rotational portion by performing driving at a rotation angle of (n+1/2)?±18 degrees or less than 90 degrees and stopping.

Abstract: A detachable body includes an opening portion, an opening and closing member, a sealing member, a sealing member, and a protrusion portion. The opening and closing member is movable between an open position and a closed position. The opening and closing member includes a facing portion that faces the opening portion with a gap when the opening and closing member is located at the closed position. When the opening and closing member is moved to the open position, the sealing member has a thickness that is thicker than a gap between the opening portion and the facing portion. When the opening and closing member is moved to the closed position, the sealing member elastically deforms to seal the opening portion. The protrusion portion protrudes from one of a frame portion around the opening portion and the facing portion toward the other.

Abstract: Provided is a developer-containing vessel including a fixing section that includes a discharge portion through which developer is discharged, a rotation section that includes a container in which the developer is contained and a dispersion member which is supported to be integrally rotatable along with the container and disperses the developer during rotation, and that is supported to be rotatable with respect to the fixing section, and a transport portion that is formed in the container, is inclined with respect to a rotational axis direction of the rotation section, and transports the developer during the rotation of the rotation section.