Abstract: An image forming apparatus includes a first toner image forming unit, a second toner image forming unit, and a transfer section. The first toner image forming unit forms a first toner image with use of a first toner. The first toner includes a binder resin. The binder resin has a weight-average molecular weight that falls within a range of from 12297 to 14019, both inclusive. The second toner image forming unit forms a second toner image with use of a second toner. The transfer section transfers the first toner image onto a print medium, and transfers the second toner image onto the print medium in a region that overlaps a portion or all of a region where the first toner image has been transferred. The print medium includes a polymer compound.

Abstract: A toner includes toner base particles each including a toner base particle and an external additive. The toner base particle includes a fluorescent pigment and a binder resin. The external additive is fixed on a surface of the toner base particle. The content of the fluorescent pigment in the toner base particle is equal to or greater than 0.3 weight percent and equal to or smaller than 3.0 weight percent. A ratio of a particle size distribution on a number basis of the toner particles to a particle size distribution on a volume basis of the toner particles is equal to or greater than 0.66 and equal to or smaller than 1.00.

Abstract: An image forming unit includes an image bearing body, a developer storage section that stores a developer removed from a surface of the image bearing body, a frame surrounding the developer storage section, a developer conveying member that conveys the developer in the developer storage section in a predetermined conveying direction, and a convex portion that is provided in the frame and pushes the developer conveying member toward the image bearing body.

Abstract: An information processing apparatus includes an apparatus main body, a rotating member rotatable with respect to the apparatus main body, a protective member to protect a predetermined portion of the rotating member and that includes a first engagement part, and an interlocking part that interlocks the rotating member and the protective member and including a second engagement par. The interlocking part causes the first engagement part and the second engagement part to be engaged with the protective member and the rotating member, and the interlocking part releases the engagement of the first engagement part and the second engagement part when the rotating member is in a predetermined rotation state.

Abstract: An image forming apparatus includes an apparatus main body having a rotation supporting point, a first rotating member rotatably supported by the rotation supporting point, a second rotating member arranged between the apparatus main body and the first rotating member and rotatably supported by the rotation supporting point, a photosensitive unit holding member holding a photosensitive unit and slidably supported by the second rotating member, a first engagement part that engages with the photosensitive unit holding member, and a second engagement part that engages with the apparatus main body.

Abstract: A medium feed unit in an image forming apparatus having an image forming unit and feeds a medium to the image forming unit, includes a medium introductory part that includes a first shaft and a medium feed part that includes a second shaft feeds the medium to the medium introductory part; a fixation part that includes a first holding part holding the first shaft and a second holding part holding the second shaft; and a link member that links the first shaft with the second shaft and is displaceable with respect to the fixation part. A first inclination angle of the first shaft with respect to the fixation part varies in accordance with a variation of a second inclination angle of the second shaft with respect to the fixation part.

Abstract: An image forming apparatus according to an embodiment may include: an apparatus body; a first cover attached to the apparatus body to open and close a first opening of the apparatus body; a second cover attached to the apparatus body to open and close a second opening of the apparatus body; an image forming section in the apparatus body configured to form a latent image and including a first contact part; a second contact part provided to the apparatus body and opposed to the first contact part; a withdrawing mechanism that moves along with movement of the first cover to bring the second contact part into contact with and separated away from the first contact part; and a withdrawal holding mechanism that moves along with movement of the second cover and holds the separation of the second contact part from the first contact part.

Abstract: A fixing device includes: a belt; a heating element that heats the belt; and a pressure member that faces the belt and forms a nip portion between the pressure member and the belt. A dielectric relaxation rate of the belt 10 seconds after applying a corona discharge at 7000 V to the belt is greater than or equal to 9.5% and less than or equal to 28.9%.

Abstract: An image formation apparatus according to an embodiment may include: a print unit that forms an image on a medium; and a medium conveyance unit that conveys the medium to the print unit. The medium conveyance unit may include: a medium guide that is movable in a width direction of the medium perpendicular to a conveyance direction of the medium, to guide a width end of the medium; a guide position detector that detects a position of the medium guide in the width direction of the medium; and a medium end detector that is provided at the medium guide and detects whether there is the medium with the width end guided by the medium guide. The print unit may include a determination unit that determines a set state of the medium based on a detection result by the medium end detector.

Abstract: A medium cutting device includes first and second conveying sections and a cutting section. The first conveying section conveys a continuous medium having a perforation that extends in a first direction. The first conveying section conveys the continuous medium in a second direction intersecting the first direction. The second conveying section is spaced from the first conveying section in the second direction, and conveys the continuous medium in the second direction. The cutting section includes a pressing member and a supporting member. The pressing member is movable in the first direction in a gap between the first and second conveying sections. The supporting member movably supports the pressing member in the second direction. The cutting section causes the pressing member to press the continuous medium while causing the pressing member to move in the first direction, thereby cutting the continuous medium at the perforation.

Abstract: A developer container according to an embodiment includes: a container having a space that contains a developer; an optical system includes a first optical member including first end face exposed to a containing space in the container and a second optical member including a second end face exposed to the containing space and being opposed to the first end face in a first direction, and on which the light is incident through the second end face; a shaft provided in the containing space to be rotatable about the first direction; a cleaning member provided to the shaft to be movable in the first direction to clean the first and second end faces by passing through a gap with a rotation of the shaft; and a guide member provided upstream of the optical system and that comes into contact with the cleaning member to guide the cleaning member to a gap.

Abstract: An image forming apparatus carrying a medium along a carrying path in a medium carrying direction includes a cutting part cutting the medium carried along the carrying path, a carrying part carrying and ejecting the medium cut by the cutting part, being located at downstream side from the cutting part, a medium jam detection part detecting a jamming of the medium by the carrying part, a remaining medium detection part detecting whether the medium remains in the carrying part, a recovery process selection part that selects a recovery process according to a remaining state of the medium, which is determined by the remaining medium detection part, and a controller that, when the medium jam detection part has detected the jamming of the medium, ejects the remaining medium based on the recovery process selected by the recovery process selection part.

Abstract: An aspect of one or more embodiment may be an inkjet image formation apparatus that may include: a head drive processor that drives a recording head to eject ink; a conveyance processor that drives a conveyance member to convey a recording medium; a carriage drive processor that drives a carriage with the recording head to move in a main scanning direction; a medium detector movable in the main scanning direction and configured to detect the recording medium on a platen; and a medium detection processor that obtains an output of the medium detector that detects plural points on the recording medium, and identify a type of the recording medium based on the obtained output of the medium detector at the plural points.

Abstract: An image formation apparatus according to an embodiment may include: an apparatus housing including a stacker formed on a periphery of the apparatus housing, wherein the stacker includes an opening; an image formation part provided in the apparatus housing and configured to form an image on a medium; and a fixation unit detachably attached in the apparatus housing and configured to fix the image formed by the image formation part on the medium, wherein in a state where the fixation unit is attached in the apparatus housing, a part of the fixation unit is exposed through the opening of the stacker to constitute a part of the stacker such that the opening of the stacker allows the fixation unit to be taken out from the apparatus housing therethrough.

Abstract: Provided are a lens array, a lens unit, an exposure device, an LED head, and an image forming apparatus. The lens array includes a plurality of lenses arranged so as to form an array. Each of the plurality of lenses is configured so that a contour focal length which is a focal length of a ray incident on a first position separate from an optical axis is longer than a paraxial focal length which is a focal length of a ray incident on a second position in the vicinity of the optical axis.

Abstract: A drive transmission device according to an embodiment may include: a driving shaft configured to be rotated by a driving source; a driven shaft; and a coupling device including a driving side coupling connected to the driving shaft and a driven side coupling connected to the driven shaft, and configured to selectively couple the driving shaft and the driven shaft with each other to transmit a rotation of the driving shaft to the driven shaft. The driving side coupling may include an Oldham's coupling including a driving side rotor, an intermediate rotor, and a driven side rotor and configured to absorb an eccentricity between the driving shaft and the driven shaft, wherein the driving side coupling further comprises a bias member provided inside of the driving side coupling, the bias member biasing the driven side rotor toward the driven side coupling.

Abstract: An image formation apparatus according to an embodiment may include: an apparatus housing including a stacker formed on a periphery of the apparatus housing, wherein the stacker includes an opening; an image formation part provided in the apparatus housing and configured to form an image on a medium; and a fixation unit detachably attached in the apparatus housing and configured to fix the image formed by the image formation part on the medium, wherein in a state where the fixation unit is attached in the apparatus housing, a part of the fixation unit is exposed through the opening of the stacker to constitute a part of the stacker such that the opening of the stacker allows the fixation unit to be taken out from the apparatus housing therethrough.

Abstract: An image forming unit includes an image bearing body, a developer storage section that stores a developer removed from a surface of the image bearing body, a frame surrounding the developer storage section, a developer conveying member that conveys the developer in the developer storage section in a predetermined conveying direction, and a convex portion that is provided in the frame and pushes the developer conveying member toward the image bearing body.

Abstract: An image forming apparatus includes a first toner image forming unit, a second toner image forming unit, and a transfer section. The first toner image forming unit forms a first toner image with use of a first toner. The first toner includes a binder resin. The binder resin has a weight-average molecular weight that falls within a range of from 12297 to 14019, both inclusive. The second toner image forming unit forms a second toner image with use of a second toner. The transfer section transfers the first toner image onto a print medium, and transfers the second toner image onto the print medium in a region that overlaps a portion or all of a region where the first toner image has been transferred. The print medium includes a polymer compound.

Abstract: A medium conveyance device includes a medium setting part on which a medium is set, a first roller coming in contact with the medium set on the medium setting part and sending out the medium in a conveyance direction, a second roller situated on a downstream side of the first roller in the conveyance direction and conveying the medium sent out by the first roller, and a medium contact part arranged in a conveyance path between the first roller and the second roller and coming in contact with the medium. The medium contact part has a plurality of contact surfaces switchable according to a type of the medium and differing in shape.