摘要:
An image forming apparatus includes an image bearer, an image forming device to form a toner image on the image bearer, a transfer device to transfer the toner image to a recording medium, a line sensor as an image density sensor to detect image density of the toner image, and a controller operatively connected to the image density sensor. The image density sensor is disposed so as to be shorter in a rotational direction of the image bearer than in a width direction of the image bearer perpendicular to the rotational direction of the image bearer. The controller forms a shading pattern image including a plurality of patches on the image bearer, and detects image density of the plurality of patches, so as to control image density. The shading pattern image is shorter in the rotational direction of the image bearer than in the width direction of the image bearer.
摘要:
An image forming apparatus includes a rotatable image bearer, a toner image forming device, an image reader, and a control unit. The toner image forming device forms a test toner image on the image bearer. The image reader reads the test toner image and a predetermined reference member. The control unit calculates an amount of toner contained in the test toner image based on image data from the test toner image. Based on image data from the reference member, the control unit selects a position of a pixel to be used for calculation of the amount of toner contained in the test toner image from pixels included in the image data from the reference member, to calculate the amount of toner contained in the test toner image from data of a pixel located at the position thus selected among pixels included in the image data from the test toner image.
摘要:
The invention provides a developer supply device, a developer container, a developer and an image forming apparatus such that the developer is discharged stably from the developer container with a stable toner concentration in the developer, without damaging the developer, and in a relatively simple and small-size device having a relatively high degree of freedom as regards layout. The developer supply device comprises a partially or wholly deformable developer container and a pump for suctioning the developer held in the developer container, together with a gas, and for discharging the developer towards a developing unit. The toner comprises an additive formed so as to have a volume average particle size of 50 to 500 nm. The carrier is formed so as to have a weight average particle size of 20 to 60 μm. The developer is formed so that the carrier concentration thereof is 1 to 30 wt %.
摘要:
A developing device is refilled with an initial developer while the developing device and a photoreceptor are maintained within an image forming apparatus in the same state as in an image forming process. When refilling the developing device, a control unit of the image forming apparatus first drives a stirring feed member (screw) to feed the initial developer into the developing device, and then drives a developer carrier (developing roller) and a latent image carrier (photoreceptor) to supply the developer onto the developer carrier.
摘要:
A developing unit includes a developer bearing member, a developer transporter, a developer conveyance system for directing the developer, including a supply path, a recovery path, and an agitation path, a developer supply opening through which the developer is supplied to the developer conveyance system, a developer supply device for supplying the developer from the developer supply opening to the developer conveyance system, a developer discharge device for discharging the developer outside the developing unit, a developer level rise detector for detecting increase in a level of the developer between the downstream end of the recovery path facing the developer bearing member in the direction of developer transport and a portion of the agitation path where the agitation path receives the collected developer from the recovery path, and a controller for controlling the developer discharge device based on the detection result provided by the developer level rise detector.
摘要:
A developing agent storage device for storing a refill developing agent includes toner particles, carrier particles, an inner layer of the developing agent storage device. The toner particles and carrier particles compose the refill developing agent. The inner layer is provided as a wall contacting the refill developing agent. An electrostatic chargeability level of the toner particles, the carrier particles, and the inner layer is set in an order of toner, inner layer, and carrier from any one of a negative charge side and a positive charge side.
摘要:
An image forming apparatus includes an image bearing member to bear an electrostatic latent image on its surface, a developing device to develop the electrostatic latent image using toner to form a toner image, a transfer device to transfer the toner image onto a recording medium, a fixing device to fix the toner image, a first detector to detect at least glossiness of a surface of the recording medium, a second detector to detect at least a space between asperities on the surface of the recording medium, and a controller to control an amount of toner when forming the toner image. The controller adjusts the amount of toner based on the glossiness of the recording medium detected by the first detector and the space between the asperities detected by the second detector.
摘要:
A method for loading a replenishment developer into a developer accommodating container such that when the replenishment of the replenishment developer inside the loaded developer accommodating container is started, the developer composed of a toner and a carrier, or a toner is discharged from a developer discharge port of the developer accommodating container, wherein when a premix toner that is a replenishment developer composed of a replenishment toner and a replenishment carrier is loaded into a toner bottle serving as the developer accommodating container, the replenishment carrier is loaded and then the replenishment toner is loaded.