摘要:
An optical writing head positioning mechanism includes spacers provided between a latent image carrier for carrying an electrostatic latent image and an optical writing head for exposing the latent image carrier. The spacers each include at least one carrier contact surface that contacts the latent image carrier and at least one head contact surface that contacts the optical writing head to determine an interval between the latent image carrier and the optical writing head. The latent image carrier is in contact with a cleaning member that cleans a cleaning area on a surface of the latent image carrier. In at least one of the spacers, the at least one carrier contact surface includes plural carrier contact surfaces not disposed on edges of the cleaning area, and one of the edges of the cleaning area is located between two adjacent ones of the plural carrier contact surfaces.
摘要:
An image forming apparatus includes a latent image bearer, a charging roller, a first cleaner, a second cleaner, and a rotation controller. The latent image bearer bears a latent image on a surface thereof. The charging roller charges the latent image bearer. The first cleaner cleans the surface of the latent image bearer. The second cleaner cleans a surface of the charging roller. The rotation controller controls the latent image bearer to execute a set of backward rotation and first forward rotation at least once during a non-image formation time period, and either temporarily stop and start second forward rotation or continuously execute the second forward rotation by a rotation distance corresponding to at least one rotation of the charging roller.
摘要:
A toner collection unit, which can be included in an image forming apparatus, includes a collected toner container having an opening and storing collected toner, a flexible seal sealing the opening of the collected toner container, having a shape of a recess in an initial condition before toner is collected in the container, and being flexible to change the shape to inflate outwardly due to a pressing force exerted from the toner stored in the container, a moving unit disposed outside the flexible seal and movable both in a positive direction to approach the opening of the container and in an opposite direction to move away from the opening when contacting the flexible seal inflating outwardly, a detector detecting movement of the moving unit, and a regulator regulating the moving unit from coming into the recess of the flexible seal in the initial condition.
摘要:
An image forming apparatus includes a housing including an opening to house a plurality of latent image bearing members for bearing latent images and latent image forming devices for forming the latent images, and an openably and closable holder to hold the latent image forming devices. The holder with one end thereof pivotally supported by the housing moves the latent image forming devices from an engaged position at which the latent image forming devices form the latent images to a retracted position at which the latent image forming devices are separated from the latent image bearing members as the holder moves to an open position at which the opening of the housing is opened. As the holder is opened, at least one of the latent image forming devices, which is closest to a fulcrum of the holder, is positioned at an end of the housing pivotally supporting the holder.
摘要:
An image forming apparatus includes an image bearer, an optical writing unit to writing an electrostatic latent image on the image bearer, the optical writing unit including multiple optical writing elements arranged in a longitudinal direction of the image bearer and a frame to hold the multiple optical writing elements, a development device to develop the electrostatic latent image on the image bearer with developer, a developer container for containing the developer supplied to the development device, and a developer amount detector to detect an amount of developer contained in the developer container based on a light transmission amount between a light-emitting element and a light-receiving element. At least one of the light-emitting element and the light-receiving element of the developer amount detector is attached to the optical writing unit.
摘要:
A belt control device includes a plurality of rollers, a belt wound around the plurality of rollers and configured to rotate along with the plurality of rollers, a belt contact member that the belt contacts when the belt moves in an axial direction of the plurality of rollers, and a shaft displacement member movable in the axial direction and including an inclined face inclined with respect to a surface of the belt to control movement of the belt in the axial direction. The belt, the belt contact member, and the shaft displacement member are configured to make a frictional force between an edge of the belt and the belt contact member greater than a frictional force between the belt contact member and the shaft displacement member.
摘要:
A belt device includes: a belt that passes through a plurality of image forming units, each of the image forming units including a transfer member and an image carrier as a pair, the transfer member moves in a direction to contact with the belt and in a direction so as to be separated from the belt; a cleaning unit cleans an outer periphery of the belt after the belt passes through all the image forming units; and a pressing member is disposed between the cleaning unit and the image forming unit located on the most upstream side and that presses the outer periphery of the belt, wherein when the transfer member of at least one of the image forming units moves to be separated from the belt, the transfer member of the rest of the image forming units and the pressing member support the belt.
摘要:
The developer container includes a rotator that is rotated in the container body, a sequence of gears disposed outside the developer container that transmits a torque to the rotator, and a container guiding portion that fits with a main body side guiding portion and guides the developer container in a direction in which the developer container is attached to a mounting portion of an image forming device main body. A first gear included in the sequence of the gears is movable between an operating position where the first gear engages with a second gear and a retracted position where the first gear is retracted. On a surface on which the container guiding portion is disposed, a part of the container guiding portion is disposed within a projected area of the first gear being disposed at the operating position.
摘要:
The developer container includes a rotator that is rotated in the container body, a sequence of gears disposed outside the developer container that transmits a torque to the rotator, and a container guiding portion that fits with a main body side guiding portion and guides the developer container in a direction in which the developer container is attached to a mounting portion of an image forming device main body. A first gear included in the sequence of the gears is movable between an operating position where the first gear engages with a second gear and a retracted position where the first gear is retracted. On a surface on which the container guiding portion is disposed, a part of the container guiding portion is disposed within a projected area of the first gear being disposed at the operating position.
摘要:
An image forming apparatus includes a powder container containing powder used for image forming and including an inlet through which the powder is supplied, a powder supply unit including an outlet that is removably connected to the inlet and supplying the powder to the powder container with the outlet connected to the inlet of the powder container, a powder amount detector detecting whether a present powder level in the powder container is equal to or greater than a threshold, and a controller controlling an amount of powder supply from the powder supply unit and controlling the present powder level in the powder container after replenishment to remain in a range from the threshold and a position corresponding to an upper edge of the inlet. A powder transport unit includes a transport decelerating part to decelerate the speed of powder transport and a detection area in the image forming apparatus.