31results about How to "Degrades image formed" patented technology

An image forming apparatus includes an image forming portion which forms a toner image on a sheet; a fixing rotary member pair which fixes the toner image onto the sheet; a reversing rotary member pair capable of performing a refeeding operation in which, in order to form a toner image on another surface of the sheet having one surface on which an image has been formed, the reversing rotary member pair rotates forward and then rotates backward to refeed the sheet toward the image forming portion; and a drive portion which drives the fixing rotary member pair and the reversing rotary member pair by a common drive source, wherein the drive portion can continue to rotate the fixing rotary member pair even when the drive portion stops the refeeding operation of the reversing rotary member pair.

An image forming apparatus includes an image forming station for forming a toner image on a sheet; an image heating portion including a flexible heating roller and a pressing roller to form a nip, the image heating portion being effective to heat while feeding the sheet, by the nip; a pressing state switching portion for switching a state of the nip between a pressing state and a released state; and a sheet feeding position detector for detecting misalignment of the sheet relative to a feeding reference position with respect to a direction perpendicular to a feeding direction of the sheet; wherein when the sheet feeding position detector detects the misalignment, the pressing state switching portion permits the nip to feed at least one sheet in a state of the misalignment, and then switches the nip to the released state and then switches to the pressing state.

The liquid ejection head includes: a piezoelectric body which generates pressure for ejecting liquid; a pressure chamber which is connected to a nozzle; a common liquid chamber which is arranged across the piezoelectric body from the pressure chamber and has at least five molded walls that are integrally molded from a resin material; groove-shaped wires which include a first wire and a second wire and are formed on at least two of the molded walls of the common liquid chamber; a liquid supply flow channel which is provided in one of the molded walls that is adjacent to the pressure chamber in such a manner that the liquid supply flow channel is connected with the pressure chamber; and an electronic circuit which is arranged on one of the molded walls of the common liquid chamber, wherein the first wire is connected to the piezoelectric body and the second wire is connected to the electronic circuit.

An image forming apparatus including a main assembly; an intermediary transfer unit including an endless intermediary transfer belt, a plurality of rollers including a driving roller for applying a driving force to the intermediary transfer belt and stretching the intermediary transfer belt, and an intermediary transfer frame integrally supporting the rollers; a main assembly rail member, fixed to the main assembly, for guiding the intermediary transfer unit, the main assembly rail member regulating and positioning at least the driving roller and a roller around which the intermediary transfer belt is wound with a wrapping angle not less than 90° in a state that intermediary transfer unit is mounted in the main assembly.

A toner replenishing apparatus that allows easy removal of a toner replenishing container and make contributions to downsizing of an image forming apparatus, and an image forming apparatus having the toner replenishing apparatus are provided. A toner replenishing apparatus has a displacement mechanism for displacing a toner replenishing container from a position with the toner replenishing container held by a container holding member. The displacement mechanism includes a hook portion formed in a retaining member and an engagement portion formed in the toner replenishing container. The displacement mechanism effects displacement of the toner replenishing container in conjunction with a release of the toner replenishing container from a retaining action of the retaining member.

An image forming device in which image carrying bodies on which an electrostatic latent image is respectively formed in accordance with for each a plurality of colors are arranged in a tandem manner, in which a charging voltage in which an alternating voltage and a direct voltage are superimposed is applied to charging devices which respectively charge each image carrying body, and in which a color image is formed by sequentially overlapping a toner image of each color formed on each image carrying body on an intermediate transfer medium or a transfer material. A direct voltage power supply for applying a direct voltage to the charging device for each color is independently provided for each charging device for each color, and an alternating voltage power supply for applying an alternating voltage to the charging device for each color is commonly provided to the charging device for each color. A current detecting section for detecting a current which flows between the each image carrying body and the each charging device is provided. A control device is provided which judges that the image carrying body is damaged when a current value detected by the current detecting section is not less than a preliminarily set specified value when a direct voltage is sequentially independently applied to the charging device for each color when leakage of charging voltage is generated.

An image forming apparatus to which a cartridge including an image bearing drum and a frame supporting the image bearing member, the apparatus includes a belt member for transferring a developed image formed on the drum onto a recording material; an opening provided to permit the cartridge to enter an inside of a main assembly; a first guide portion for guiding the cartridge through the opening from a position where a bottom end portion of the drum is below a transfer position where the drum and the belt member contact with each other when the cartridge is mounted; a second guide portion provided downstream of the first guide portion with respect to a mounting direction in which the cartridge is mounted to the main assembly, the second guide portion guiding the cartridge from a position where the bottom end portion of the drum is below the transfer position to a position where the bottom end portion of the drum is above the transfer position; and a third guide portion provided downstream of the second guide portion with respect to the mounting direction, the third guide portion guiding the cartridge from the position where the bottom end portion is above the transfer position to the transfer position.

An imaging device, such as an EEM, includes an electric/magnetic lens used to focus pulsed electrons emitted from an object on to a target plane. Before a pulse of emitted electrons reaches the lens, electrons are spatially separated in dependence on their respective kinetic energies and are then subject to a time varying electric field that keeps the final focal plane constant for a wide variety of different energy electrons. The electric field compensates for variations in the image focal length caused by a spread in kinetic energies, causing the electrons to be focused proximate the target plane, reducing chromatic aberration. The varying electric field may be provided by varying an electric potential at the lens by, for example, varying a voltage supplied to an electrode at the lens. This potential effectively varies the focal strength of the lens in time, in order to compensate for variations in kinetic energies of electrons arriving at the lens, effectively keeping the image plane position constant.

Disclosed an image forming system including: an image forming apparatus to form an image on a sheet conveyed from a feeding section to eject the sheet; and a plurality of finishers each including one or a plurality of ejection trays, which finishers are connected to the image forming apparatus and perform finishing to the sheet ejected from the image forming apparatus, wherein the image forming apparatus includes a control section to determine a sheet feeding interval of the feeding section based on a position of the ejection tray to which a first sheet is ejected and a position of the ejection tray to which a second sheet is ejected, an image-forming order of the second sheet being immediately before an image-forming order of the first sheet.

The separation holding member 36 includes a grip portion 36h for detaching the separation holding member 36 from the cartridge B, the grip portion 36h being configured so as to assume a first shape of protruding in a direction of separation from a surface of the cartridge B when the cartridge B mounted with the separation holding member 36 is detached from the apparatus main body A and to assume a second shape in which a gap with the surface of the cartridge B is smaller than in the first shape when the cartridge B mounted with the separation holding member 36 is mounted to the apparatus main body A.

An image forming apparatus has a plurality of developing devices for developing an electrostatic image formed on an image bearing member, a rotary member holding the plurality of developing devices and rotated in a route including a developing position, the rotary member selectively positioning any one of the developing devices at the developing position, each of the plurality of developing devices having a first developer carrying member and a second developer carrying member for carrying a developer thereon and carrying it to the image bearing member, and a holding member holding the first developer carrying member and the second developer carrying member and pivotally movably provided.

The invention provides an image forming device, a process cartridge engaged with the same and a method for firmly positioning the process cartridge in the image forming device. The image forming device, comprising a main frame and a main frame driving gear, wherein a guide rail is respectively arranged on the left and right sides of the inside of said main frame; an installation section is arranged at the tail end of each guide rail; and said installation section and said guide rail approximately form a barb. Lugs formed at both ends of a housing of the process cartridge are driven by a radial component of driving force of the image forming device to the process cartridge to always closely lean against the walls of the installation sections at the tail ends of the guide rails when the process cartridge is in the operating state in the image forming device.

A power supply apparatus includes a transformer, an electrolytic capacitor provided in primary circuitry of the transformer, a board, and a heat sink having a protruding portion and a cover portion. The electrolytic capacitor includes an explosion-proof valve that opens to cause an electrolytic solution to be jetted from the electrolytic capacitor. The electrolytic capacitor is placed on the board so that a surface of the electrolytic capacitor opposite to a surface on which the explosion-proof valve is provided faces the board. The cover portion has a hole formed in the cover portion and, when the cover portion is viewed in a direction vertical to the surface of the electrolytic capacitor on which the explosion-proof valve is provided, at least the explosion-proof valve and the hole formed in the cover portion do not overlap each other and the cover portion encompasses the explosion-proof valve.