Abstract: An inkjet-type image forming apparatus, includes: an intermediate transfer body that has an outmost surface layer and transfers a photo-curable ink to a recording medium; a light irradiator that performs a tentative-curing treatment by photo-curing the photo-curable ink after the ink is landed on the intermediate transfer body and before the landed ink is transferred to the recording medium; a temperature controller that causes the outmost surface layer to be melted, expanded, or contracted; and a transferor that transfers the photo-curable ink landed on the intermediate transfer body to the recording medium.

Abstract: An inkjet-type image forming apparatus, includes: an intermediate transfer body that has an outmost surface layer and transfers a photo-curable ink to a recording medium; a light irradiator that performs a tentative-curing treatment by photo-curing the photo-curable ink after the ink is landed on the intermediate transfer body and before the landed ink is transferred to the recording medium; a temperature controller that causes the outmost surface layer to be melted, expanded, or contracted; and a transferor that transfers the photo-curable ink landed on the intermediate transfer body to the recording medium.

Abstract: An image forming apparatus includes: a drop applier that applies a drop to a surface of a coating layer formed on a surface of a recording medium; a viscosity improver that improves viscosity of the drop on the surface of the coating layer; and a roller that rolls the drop improved in viscosity, wherein the drop at a time of rolling has lower viscosity than the coating layer.

Abstract: An image formation apparatus includes: an image carrier having a surface on which a toner image is formed; a transfer roller cooperating with a surface of the image carrier to form a nip at a first position in a direction in which the image carrier rotates; a discharging member provided at a second position downstream of the nip in a direction in which the transfer roller rotates; a first power supply that applies a first voltage opposite in polarity to toner to the transfer roller to transfer the toner image to a recording medium when the recording medium is inserted in the nip; and a second power supply that applies a second voltage identical in polarity to the toner to the discharging member to cause an electric discharge to electrically charge the toner on the surface of the transfer roller to electrically attract the toner to the transfer roller.

Abstract: A magnet roller includes a magnet portion for generating magnetic force such that a plurality of peaks are formed in a magnetic force distribution. The magnet portion includes a plurality of magnetic poles. A cross section of the magnet portion includes a portion in which a distance from an axial center of the magnet portion to an outer edge of the magnet portion continuously changes in the circumferential direction. The magnetic force on a surface of a developing sleeve at a position corresponding to each of the plurality of magnetic poles is determined by (i) a distance from each of the plurality of magnetic poles to the developing sleeve in a radial direction of the developing sleeve and (ii) a magnitude of magnetic force in each of the plurality of magnetic poles. The distances from the plurality of magnetic poles to the developing sleeve in the radial direction are different.

Abstract: An image formation apparatus includes: an image carrier having a surface on which a toner image is formed; a transfer roller cooperating with a surface of the image carrier to form a nip at a first position in a direction in which the image carrier rotates; a discharging member provided at a second position downstream of the nip in a direction in which the transfer roller rotates; a first power supply that applies a first voltage opposite in polarity to toner to the transfer roller to transfer the toner image to a recording medium when the recording medium is inserted in the nip; and a second power supply that applies a second voltage identical in polarity to the toner to the discharging member to cause an electric discharge to electrically charge the toner on the surface of the transfer roller to electrically attract the toner to the transfer roller.

Abstract: A magnet roller includes a magnet portion for generating magnetic force such that a plurality of peaks are formed in a magnetic force distribution. The magnet portion includes a plurality of magnetic poles. A cross section of the magnet portion includes a portion in which a distance from an axial center of the magnet portion to an outer edge of the magnet portion continuously changes in the circumferential direction. The magnetic force on a surface of a developing sleeve at a position corresponding to each of the plurality of magnetic poles is determined by (i) a distance from each of the plurality of magnetic poles to the developing sleeve in a radial direction of the developing sleeve and (ii) a magnitude of magnetic force in each of the plurality of magnetic poles. The distances from the plurality of magnetic poles to the developing sleeve in the radial direction are different.

Abstract: An image forming apparatus includes an image former which forms an image on an image carrying member with toner stored in a storage, a toner supplier which supplies toner to the storage by driving a conveyance member, a density measurer which causes the image former to form an image having a predetermined density at a predetermined timing and measures density of the formed image, a corrector which corrects a driving amount of the conveyance member based on the density measured by the density measurer, and a changer which changes a timing when the density measurer measures the density in response to an event that a predetermined condition is satisfied.

Abstract: A development device includes: a developer carrier including a magnet roller and a sleeve around the magnet roller; and a restriction member provided opposed to the sleeve surface. When a region on the surface opposed to the restriction member is defined as a first region and regions adjacent to the first region are defined as second and third regions, a magnetic flux density is largest in the second region. When a position where the density is largest in the second region is defined as a reference position, a position where the density is a predetermined value in the second region is defined as a downstream position, and a position where the density is the predetermined value in the third region is defined as an upstream position, the width between the reference position and the upstream position is longer than the width between the reference position and the downstream position.

Abstract: An image forming apparatus includes an image former which forms an image on an image carrying member with toner stored in a storage, a toner supplier which supplies toner to the storage by driving a conveyance member, a density measurer which causes the image former to form an image having a predetermined density at a predetermined timing and measures density of the formed image, a corrector which corrects a driving amount of the conveyance member based on the density measured by the density measurer, and a changer which changes a timing when the density measurer measures the density in response to an event that a predetermined condition is satisfied.

Abstract: A development device includes: a developer carrier including a magnet roller and a sleeve around the magnet roller; and a restriction member provided opposed to the sleeve surface. When a region on the surface opposed to the restriction member is defined as a first region and regions adjacent to the first region are defined as second and third regions, a magnetic flux density is largest in the second region. When a position where the density is largest in the second region is defined as a reference position, a position where the density is a predetermined value in the second region is defined as a downstream position, and a position where the density is the predetermined value in the third region is defined as an upstream position, the width between the reference position and the upstream position is longer than the width between the reference position and the downstream position.