Abstract: An image forming apparatus includes an image bearing member for bearing a latent image and a charger for charging the image bearing member. The charged image bearing member is exposed to form the latent image and a developing unit develops the latent image. One of an exposure amount reduction mode for executing image formation by reducing an exposure amount and a normal mode for executing image formation with a normal exposure amount is selected. A correction amount of a look-up table for gradational correction is changed when the exposure amount reduction mode is selected.

Abstract: There is herein disclosed an image forming apparatus comprising an image bearing member for bearing an electrostatic image, a developing device for developing the electrostatic image on the image bearing member, a temperature and humidity sensor for detecting temperature and humidity, a deciding device for deciding an image forming condition based on the detection output of the temperature and humidity detection sensor, and a correcting device for correcting the decision of the image forming condition by the deciding means in a low humid environment and at continuous image formation.

Abstract: An image forming apparatus includes an LED array for performing exposure according to an input image signal, a photoconductive drum on which an electrostatic latent image is formed by exposure with the LED array, a developing device for making the electrostatic image visible, a transfer charger for transferring the visible image onto a transfer material, and a fixing device for fixing the image on the transfer material. When the operating speed in an image forming process equals the image forming speed, and the image forming speed can be switched among a plurality of levels, the image forming condition is changed in accordance with the image forming speed.

Abstract: The invention provides an image forming apparatus which, in case of switching to an exposure amount reduction mode for executing the image formation with an exposure amount reduced from that in the normal image formation in order to prevent ghost image generation resulting from the exposure memory effect of the photosensitive member, corrects a look-up table for gradational correction for the intermediate density or is provided with a look-up table for the exposure amount reduction mode.

Abstract: An image forming apparatus includes an LED array for performing exposure according to an input image signal, a photoconductive drum on which an electrostatic latent image is formed by exposure with the LED array, a developing device for making the electrostatic image visible, a transfer charger for transferring the visible image onto a transfer material, and a fixing device for fixing the image on the transfer material. When the operating speed in an image forming process equals the image forming speed, and the image forming speed can be switched among a plurality of levels, the image forming condition is changed in accordance with the image forming speed.

Abstract: There is herein disclosed an image forming apparatus comprising an image bearing member for bearing an electrostatic image, a developing device for developing the electrostatic image on the image bearing member, a temperature and humidity sensor for detecting temperature and humidity, a deciding device for deciding an image forming condition based on the detection output of the temperature and humidity detection sensor, and a correcting device for correcting the decision of the image forming condition by the deciding means in a low humid environment and at continuous image formation.

Abstract: In case of a full-color image forming apparatus, Modulation Transfer Function (MTF) unevenness at an identical location in the longitudinal axis tends to be intensified.

Abstract: A latent electrostatic image developing device for use in developing a latent electrostatic image to a toner image in an image forming machine. The device includes a developing roller within a development housing for holding a developer on its surface in a developer holding zone and conveying the developer, which is held to a developing zone, in order to apply it to a latent electrostatic image. A restricting portion has a blade which includes a rigid part for acting on the surface of the developing roller in a developer restricting zone located between the developer holding zone and the developing zone in order to restrict the amount of the developer held on the surface. The blade is caused to protrude to the upstream side as viewed in the direction of movement of the developing roller, and that border of its protrusion facing the developing roller is provided with a C 0.1 to 0.6 mm chamfer (C being the JIS designation for a 45 degree chamfer).

Abstract: An apparatus for developing an electrostatic latent image includes a developing agent application device which holds the developing agent on the surface thereof in the developing agent-holding zone, and conveys the thus held developing agent into a developing zone to apply it onto the electrostatic latent image. A limiting device is included for limiting the amount of the developing agent held on the surface of the developing agent application device in a developing agent limiting zone located between the developing agent holding zone and the developing zone. The limiting device includes a blade made of a rigid member that is brought into forced contact with the surface of the developing agent application device, a blade support device for supporting the blade in a manner such that a first surface thereof is forced into contact with the surface of the developing agent application device, and a resilient urging device which is disposed on a side of a second surface of the blade.