Abstract: A developing device includes a rotating member that is formed in a tubular shape, that is provided to be rotatable, that includes one end portion and the other end portion, and that includes an outer peripheral surface to which a developer adheres, plural magnetic poles that are disposed inside the rotating member and that are disposed to be arranged in a rotation direction of the rotating member, a first magnetic member that is disposed outside the rotating member, that is disposed at a position facing the one end portion of the rotating member, that includes a downstream-side end portion, which is an end portion positioned on a downstream side in the rotation direction of the rotating member, and that forms a magnetic field between the first magnetic member and the magnetic poles, and a second magnetic member that is disposed outside the rotating member, that is disposed at a position facing the one end portion of the rotating member, that is disposed to be closer to the other end portion of the rotating me

Abstract: An image forming apparatus includes an image carrier; a developing device that applies a developer to the image carrier; and a supplying device that supplies a developer to the developing device, the supplying device having a developer flow path along which a developer that moves toward the developing device passes, the supplying device being configured such that a gas that has flowed from the developing device to the supplying device passes along the developer flow path toward an upstream side in a movement direction of a developer.

Abstract: An image forming apparatus includes an image carrier; a developing device that applies a developer to the image carrier; a mount portion on which a developer storage container in which a developer is stored and having a cylindrical shape is to be mounted; and a supplying device that supplies a developer from the developer storage container to the developing device, the supplying device having an opening through which an inside and an outside of the supplying device are in communication with each other, the opening being located at a position facing an outer peripheral surface of the developer storage container mounted on the mount portion.

Abstract: An image forming apparatus includes plural image holding bodies and plural developing devices that respectively develop images on the image holding bodies by using developers that are different from each other in fluidity, in which each of the developing devices includes an accommodation portion that accommodates a developer and that includes a first transport path extending in one direction, a second transport path disposed below the first transport path and extending in the one direction, a first connection portion connecting one end of the first transport path and one end of the second transport path to each other, and a second connection portion connecting the other end of the first transport path and the other end of the second transport path to each other, a first transport member that is disposed in the first transport path and that transports the developer from one end to the other end in the one direction, a second transport member that is disposed in the second transport path and that transports the

Abstract: A developing device includes: a supply and transportation unit that transports a developer containing toner and a carrier to a developer holder while supplying the developer to the developer holder, the developer holder holding the developer; an agitation and transportation unit that transports the developer while agitating the developer in a hollow transport path that is disposed to be adjacent to and below the supply and transportation unit in a vertical direction; an upward transport path that is disposed on a downstream side in a transport direction of the agitation and transportation unit and through which the developer transported from the agitation and transportation unit is sent to the supply and transportation unit on an upper side; a detection unit that detects a concentration of the toner in the developer at a position upstream of the upward transport path in the transport direction of the agitation and transportation unit; and a removal unit that removes the developer remaining on a detection surf

Abstract: A developing device includes: a supply and transportation unit that transports a developer containing toner and a carrier to a developer holder while supplying the developer to the developer holder, the developer holder holding the developer; an agitation and transportation unit that transports the developer while agitating the developer in a hollow transport path that is disposed to be adjacent to and below the supply and transportation unit in a vertical direction; an upward transport path that is disposed on a downstream side in a transport direction of the agitation and transportation unit and through which the developer transported from the agitation and transportation unit is sent to the supply and transportation unit on an upper side; and a detection unit that detects a concentration of the toner in the developer at a position upstream of the upward transport path in the transport direction of the agitation and transportation unit.

Abstract: A developing device includes: a supply and transportation unit that transports a developer containing toner and a carrier to a developer holder while supplying the developer to the developer holder, the developer holder holding the developer; an agitation and transportation unit that transports the developer while agitating the developer in a hollow transport path that is disposed to be adjacent to and below the supply and transportation unit in a vertical direction; an upward transport path that is disposed on a downstream side in a transport direction of the agitation and transportation unit and through which the developer transported from the agitation and transportation unit is sent to the supply and transportation unit on an upper side; an air flow path that is provided to be adjacent to and below the transport path in the vertical direction and through which air that is taken in through an inflow port along the transport direction of the agitation and transportation unit flows toward a discharge port; a

Abstract: A developing device includes a tubular member through which developer is to be transported, a tube supporting member that supports the tubular member, and a sensor that is positioned relative to the tube supporting member and is configured to acquire information on the developer that is present in the tubular member.

Abstract: A developing device, configured to perform development on an image carrier, includes: a loop-shaped developer movement path in which developer is to circulate, the developer movement path including an upper movement path and a lower movement path along each of which the developer is to move, the lower movement path being located lower than the upper movement path; and an inlet through which fresh developer is to be supplied to the developing device. The developer received at the inlet is caused to move along the upper movement path before moving to the lower movement path.

Abstract: A developing device includes a tubular member through which developer is to be transported, an end support that supports an end of the tubular member, and a blocking member that extends over an end face of the tubular member and the end support and that blocks the developer from entering a gap between an outer peripheral surface of the tubular member and the end support.

Abstract: An image forming apparatus, includes: an image forming unit that forms a toner image on a medium; a heating unit that is provided on a downstream side in a transport path from the image forming unit and that is configured to heat a medium being transported in a non-contact manner; a fixing unit that is provided on a downstream side in the transport path from the heating unit and fixes the toner image on the medium; a shielding unit to which force is applied so as to be inform a closed state in which the heating unit is shielded; and an open state forming unit configured to receive power supply to drive the shielding unit so as to form an open state in which the heating unit is opened, and maintain the open state while the power is being supplied.

Abstract: A fixing device includes: a heating unit configured to heat a medium to be conveyed along a conveyance path by radiation; and a shielding unit made of non-metallic material, the shielding unit being configured to form a shielding state in which radiation from the heating unit is shielded and a non-shielding state in which radiation from the heating unit is not shielded, in which the shielding unit being expanded in a direction intersecting the radiation in the shielding state and is stored in the non-shielding state.

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: 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 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 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: 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.