Abstract: An image forming apparatus and corresponding method, the image forming apparatus including a belt member supported by at least two rollers, an image forming member configured to form a patch pattern of image data on a surface of the belt member, a belt supporting member configured to support the belt member on a contact area thereof with respect to the belt member at a position higher than a tangent line of the at least two rollers, and a sensor configured to detect the patch pattern formed on the surface of the belt member at the contact area of the belt supporting member and the belt member.

Abstract: An image forming apparatus includes a toner container, an image development mechanism, and a toner container holder. The toner container has a longitudinal length with first and second longitudinal ends, is driven for rotation to move the toner. The image development mechanism develops an electrostatic latent image into a toner image. The toner container holder includes a base plate onto which the toner container is inserted in a direction perpendicular to the longitudinal direction of the toner container. The toner container holder further includes first and second supporters. The first and second supporters are mounted in traversal edge sides of the base plate and support the first and second longitudinal ends of the toner container, respectively.

Abstract: An image forming apparatus includes an image carrier, a transferor, a fixing unit, and a guide. The image carrier carries a toner image. The transferor opposes the image carrier to form a transfer nip and transfers the toner image on the image carrier onto a recording medium at the transfer nip. The fixing unit fixes the toner image on the recording medium. The guide guides the recording medium bearing the toner image from the transferor toward the fixing unit and includes a surface portion directly contacting the recording medium. The surface portion includes a material for charging the recording medium to have a polarity opposite to the polarity of a toner forming the toner image.

Abstract: Methods and apparatus are disclosed for protecting circuits from damages caused by elevated temperatures. Presented embodiments illustrate IC thermal protection circuits that shut down power delivery circuits when the circuit temperature reaches a predefined upper threshold and restart the circuit when the circuit cools down to a predefined lower threshold. Other embodiments provide soft shutdown and soft restart, where not only the temperature range between the shutdown and the restart is predetermined, but also the time between the start of a shutdown process and the complete shutdown is controllable.

Abstract: An image forming apparatus is disclosed that holds its detachably attached constituent units at predetermined positions for operations, and releases the hold when exchanging and inspecting the constituent units. The image forming apparatus includes a main body having an opened portion on one side, one or more devices detachably attached to the main body through the opened portion, and a holding unit that is capable of being opened and closed relative to the opened portion. The holding unit is engaged with the devices and holds the devices at the predetermined positions when the holding unit is closed relative to the opened portion. A fixing unit arranged on the holding unit fixes the holding unit when the holding unit is closed.

Abstract: An image forming apparatus includes a toner container, an image development mechanism, and a toner container holder. The toner container has a longitudinal length with first and second longitudinal ends, is driven for rotation to move the toner. The image development mechanism develops an electrostatic latent image into a toner image. The toner container holder includes a base plate onto which the toner container is inserted in a direction perpendicular to the longitudinal direction of the toner container. The toner container holder further includes first and second supporters. The first and second supporters are mounted in traversal edge sides of the base plate and support the first and second longitudinal ends of the toner container, respectively.

Abstract: An electrode of an image bearing unit and an electrode of a power supply are positioned in the front, rather than far inside of the main body of the image forming apparatus. A holder opposes these electrodes in an openable/closable manner. The holder includes an electric conductor that electrically connects the electrode of an image bearing unit and an electrode of a power supply when the holder is closed. The image bearing unit can be detached or attached when the holder is open.

Abstract: A neutralization unit for use in an image forming apparatus includes a support member made of an insulating material, an electric-charge removing member made of an electric conductive material, and a rib made of an insulating material. The electric-charge removing member, fixed on the support member, removes electric charge from a back face of the recording medium after a toner image is transferred to a front face of a recording medium at a transfer nip. The electric-charge removing member includes a plurality of exposed areas along a longitudinal direction of the electric-charge removing member. The rib, provided on the support member, has a curved peripheral side and protrudes from a surface of the electric-charge removing member. The back face of the recording medium is contactable at the curved peripheral side of the rib when the recording medium is transported from the transfer nip.

Abstract: An image forming apparatus includes an image forming mechanism for forming an image, at least one guide member arranged in parallel, and a belt unit to be inserted into and removed from the image forming apparatus. The belt unit includes a belt, at least two rotating supports, a supporting frame, a cover, and at least one guided member. The belt is formed in an endless belt shape and transfers the image formed by the image forming mechanism. The belt is looped over the rotating supports which are rotatably supported by the supporting frame. The cover covers an outer circumferential surface of the belt. The guided member is disposed on an outer surface of the cover, engages with the guide member, and is slidably moved along the guide member when the belt unit is inserted into and removed from the image forming apparatus.

Abstract: One end of a rotational shaft of a supporting rotational body attached with a rotational member is rotatably supported. The rotational member is sandwiched by a supporting frame that rotatably supports supporting rotational bodies spanned with an annular belt and fixing members fixed to the supporting frame. Thus, the one end of the rotational shaft is supported by the supporting frame and the fixing members at, at least two points. A mark detector is fixed to the fixing members, and the fixing members are fixed to the supporting frame at, at least two points. Accordingly, erroneous detection of a rotational angular speed or a rotational angular displacement of a supporting rotational body due to vibration of the supporting rotational body can be suppressed.

Abstract: An image forming apparatus of the present invention includes a pair of support plates supporting the rotary shaft of a photoconductive drum at axially opposite ends of the drum. One of the support plates is openable away from the body of the apparatus and loaded with a contact forming member including a current feed path for feeding a current from a high-tension power supply for charging to a charge roller, a wiring forming a current return path that allows a current to flow from the photoconductive drum to the ground of the power supply, and a plurality of contacts where the wiring and drum contact each other. A current flowing through the current return path is sensed to execute feedback control to the output of the high-tension power supply.

Abstract: An image forming apparatus is disclosed, that includes multiple imaging units, a loading unit formed on the top face of the main body of the image forming apparatus, and a discharging unit disposed at the operation side of the main body. The image forming apparatus further includes multiple developer containing members disposed in the main body for providing the corresponding imaging units with developer, the developer containing members being arranged in a direction extending from the operation side of the main body. The developer containing members are detachable from the main body of the image forming apparatus, and can be handled in a space above the image forming apparatus, the space being limited to the width of the main body.

Abstract: A toner container mounting member comprises mounted thereon a plurality of toner containers that perform supply of toner by being themselves rotated. The toner containers are laid in the same direction to be mounted/released from above; a plurality of guiding members that rotatably support the toner containers are integrally formed.

Abstract: An image forming apparatus is disclosed, that includes multiple imaging units, a loading unit formed on the top face of the main body of the image forming apparatus, and a discharging unit disposed at the operation side of the main body. The image forming apparatus further includes multiple developer containing members disposed in the main body for providing the corresponding imaging units with developer, the developer containing members being arranged in a direction extending from the operation side of the main body. The developer containing members are detachable from the main body of the image forming apparatus, and can be handled in a space above the image forming apparatus, the space being limited to the width of the main body.

Abstract: An electrode of an image bearing unit and an electrode of a power supply are positioned in the front, rather than far inside of the main body of the image forming apparatus. A holder opposes these electrodes in an openable/closable manner. The holder includes an electric conductor that electrically connects the electrode of an image bearing unit and an electrode of a power supply when the holder is closed. The image bearing unit can be detached or attached when the holder is open.

Abstract: An image forming apparatus that has improved usability, while maintaining good positional relationship of units detachably installed inside the apparatus body. The image forming apparatus comprises a plurality of rotatable image carriers, each incorporated in a respective image producing unit, and an intermediate transfer unit comprising an intermediate transfer body which is installed between a plurality of roller members and to which transfer toner images formed on each image carrier are transferred. The shaft of each image carrier and the shaft of each roller are disposed on a positioning plate, and the each image carrier and the intermediate transfer body are fixed in normal positions by applying pressure independently to each shaft.

Abstract: An electrode of an image bearing unit and an electrode of a power supply are positioned in the front, rather than far inside of the main body of the image forming apparatus. A holder opposes these electrodes in an openable/closable manner. The holder includes an electric conductor that electrically connects the electrode of an image bearing unit and an electrode of a power supply when the holder is closed. The image bearing unit can be detached or attached when the holder is open.

Abstract: An image forming apparatus includes a toner container, an image development mechanism, and a toner container holder. The toner container has a longitudinal length with first and second longitudinal ends, is driven for rotation to move the toner. The image development mechanism develops an electrostatic latent image into a toner image. The toner container holder includes a base plate onto which the toner container is inserted in a direction perpendicular to the longitudinal direction of the toner container. The toner container holder further includes first and second supporters. The first and second supporters are mounted in traversal edge sides of the base plate and support the first and second longitudinal ends of the toner container, respectively.

Abstract: The present invention relates to an electrophotographic color image forming apparatus using a tandem-drum development, an indirect image-transfer method, and a vertical sheet supply path. An intermediate image-transfer member is angled relative to a horizontal line such that a rear side of the intermediate image-transfer member away from a recording sheet is lifted and a front side of the intermediate image-transfer member closer to the recording sheet is lowered. Further, image creating mechanisms of the tandem-drum development are aligned and arranged in parallel to a moving image transfer bed of the intermediate image-transfer member, such that one of the image creating mechanisms firstly forming an image faces the rear side of the moving image transfer bed and another one of the image creating mechanisms lastly forming an image faces the front side.

Abstract: The present invention relates to an electrophotographic color image forming apparatus using a tandem-drum development, an indirect image-transfer method, and a vertical sheet supply path. An intermediate image-transfer member is angled relative to a horizontal line such that a rear side of the intermediate image-transfer member away from a recording sheet is lifted and a front side of the intermediate image-transfer member closer to the recording sheet is lowered. Further, image creating mechanisms of the tandem-drum development are aligned and arranged in parallel to a moving image transfer bed of the intermediate image-transfer member, such that one of the image creating mechanisms firstly forming an image faces the rear side of the moving image transfer bed and another one of the image creating mechanisms lastly forming an image faces the front side.