Abstract: An image forming apparatus forms a predetermined test image, detects a spatial frequency characteristic of the test image, and determines an optimum image forming condition on the basis of the detected spatial frequency characteristic.

Abstract: A transparent laminate film, including at least a first transparent resin layer comprising a transparent resin having a heat-resistance, and a second transparent resin layer disposed thereon comprising a transparent resin, wherein the transparent resin of the second transparent resin layer has a compatibility with a binder resin of a toner to be fixed thereon, and has a large elasticity than that of the binder resin of the toner at a fixing temperature of the toner.

Abstract: An image forming system including a rotatable image bearing member, a rotatable transfer sheet bearing member for bearing a transfer sheet, and a common drive source for rotatably driving the image bearing member and the transfer sheet bearing member. An image is transferred from the image bearing member onto the transfer sheet born by the transfer sheet bearing member. The image bearing member and the transfer sheet bearing member are rotated at the same angular velocity.

Abstract: The present invention aims to improve the image forming efficiency by selecting positions where image adjusting toner images are formed to non-image areas of convey means by changing the supply timing of a transfer sheet onto the convey means, in an image forming apparatus wherein a plurality of electrophotographic photosensitive members are arranged side by side and color toner images formed on the photosensitive members are successively transferred onto a transfer sheet supplied at transfer positions for the photosensitive members thereby to form a color image on the transfer sheet.

Abstract: An image processing apparatus, which improves the image quality in gradation control, measures the density of a specified gradation pattern formed on a photosensitive drum with a photosensor and prepares a look-up table for gamma correction, based on thus measured density. Formation of a pseudo-contour is prevented by control of the inclination of the gamma correction curve represented by the data of the look-up table.

Abstract: The present invention relates to a toner image density detecting mechanism for an image forming apparatus which includes an image bearing layer supported on a rotatable cylindrical member, a device for forming a plurality of toner reference patterns on the image bearing layer at respective positions which equally divide a circumference of the cylindrical member, a detector for detecting an image density of the toner image of the reference pattern, and a controller controlling an image forming condition in accordance with an output of the detector; wherein an average of the image densities is determined for use in a control operation of the controller. Preferably, the toner used has a reflective or absorbing rate not less than 1.5 times that of the image bearing layer.

Abstract: An image forming apparatus includes an image forming device for forming images on a recording material at an image forming position, and a movable recording material carrying device for carrying and conveying the recording material to the image forming position. The recording material carrying device has a carrying sheet for carrying the recording material, and a frame for supporting the carrying sheet. The distance between a portion of the carrying sheet which is fixed to the frame and an end portion of the recording material of the maximum size carried on the carrying sheet is 20 mm or more in a direction substantially perpendicular to the direction in which the recording material carrying device is moved.

Abstract: A transparent laminate film, including at least a first transparent resin layer comprising a transparent resin having a heat-resistance, and a second transparent resin layer disposed thereon comprising a transparent resin, wherein the transparent resin of the second transparent resin layer has a compatibility with a binder resin of a toner to be fixed thereon, and has a large elasticity than that of the binder resin of the toner at a fixing temperature of the toner.

Abstract: An image forming apparatus includes an image forming device for forming an image on a recording material in an image forming position. A recording material feeder is provided for feeding the recording material to the image forming position, the recording material feeder including a recording material carrying member for carrying the recording material. A supply device is provided for supplying the recording material to the recording material carrying member at a recording material supply position, a first urging member urges a second surface of the recording material carrying member which is opposite from a first surface thereof for carrying the recording material in the recording material supply position, and a second urging member urges the second surface at the image forming position, and wherein an urging force of the second urging member is not less than an urging force of the first urging member.

Abstract: The present invention concerns output sheet having optical transparency of an image forming device which supports a toner image and then fixes the toner image by passing through a heating fixing device, and an image forming device by use of such sheet. For enabling detection of the conveying state of the sheet at high precision, a colored ink containing metallic powder is printed at a part of the sheet to provide a mark portion for recognition.

Abstract: The present invention provides a recording sheet used with an image forming apparatus comprising: an optical functional portion disposed along at least one edge of the recording sheet and arranged asymmetrically with respect to a center of the edge and having a functional feature regarding light different from that of an image forming portion of the recording sheet.

Abstract: An image forming apparatus having a photosensitive drum and a transfer drum including a transfer member carrying sheet substantially contacting the photosensitive drum. In order to enable a toner image formed on the photosensitive drum to be efficiently transferred to a transfer member, the apparatus has a pressing sheet for outwardly pressing the transfer member carrying sheet from the interior of the transfer drum and a conductive member provided on the side of the pressing sheet adjacent the transfer member carrying sheet. The conductive member serves to realize a uniform distribution of surface potential on the pressing sheet and to maintain the surface potential constant, so that the intensity of the electric field applied to the corona discharge is made constant at a low level so that a stable transfer corona is applied to the transfer member carrying sheet, thus ensuring good quality of the transferred image.

Abstract: A transparent laminate film, including at least a first transparent resin layer comprising a transparent resin having a heat-resistance, and a second transparent resin layer disposed thereon comprising a transparent resin, wherein the transparent resin of the second transparent resin layer has a compatability with a binder resin of a toner to be fixed thereon, and has a large elasticity than that of the binder resin of the toner at a fixing temperature of the toner.

Abstract: An image forming apparatus includes a movable image bearing means, an image forming device for forming an image on the image bearing member, an image receiving material bearing member for carrying and conveying an image receiving material to an image transfer station where the image formed by the image forming device is transferred from the image bearing member to the image receiving material, an image transfer device disposed at the transfer station in opposition to the image bearing device, a discharger, disposed downstream of the image transfer device with respect to the movement direction of the image receiving material and in opposition to the image receiving material carrying member, and operative when a trailing edge of the image receiving material is substantially immediately before a transfer zone by the image transfer device or when it is in the transfer zone, during the period when the image receiving material is conveyed by the image receiving material carrying member.

Abstract: An image forming apparatus includes a movable image bearing member, a device for sequentially forming on the image bearing member images corresponding to different color information, a device for transferring onto an image receiving material the images formed on the image bearing member, image receiving material carrying member for carrying and conveying the image receiving material to an image transfer station where the image bearing means and the transfer device are opposed, wherein the images formed on the image bearing member are sequentially transferred superimposedly onto the image receiving material at the transfer station, a discharging device disposed downstream of the image transfer device with respect to movement detection of the image receiving material carrying member, a detector for detecting a temperature and a humidity within the image forming apparatus, and a control device for controlling outputs of the image transfer device and the discharging device on the basis of output from the detector

Abstract: An image forming apparatus including an image bearing member, a developing device for developing a latent image formed on the image bearing member and including a developer carrying member for carrying the developer toward the image bearing member, a toner content detecting device including a reflecting member for receiving light and reflecting a quantity of light corresponding to a reference toner content, a light emitting element and a light receiving element for producing an electric signal in accordance with a quantity of light applied to and received from the reflecting member, and a toner content control device for controlling toner supply to the developing device in accordance with a signal produced by the toner content detecting device. The toner content control device includes a device for storing a ratio of a reference toner content signal to a reference reflection density signal.

Abstract: Anti-inflammatory agent comprises an active ingredient of benzoyl derivative having the formula ##STR1## WHEREIN R.sub.1 represents hydrogen, halogen, hydroxy, C.sub.1-8 alkyl or C.sub.1-8 alkoxy,R.sub.2 represents hydrogen, halogen, hydroxy, vinyl, C.sub.1-8 alkyl or C.sub.1-8 alkoxy,A represents carbonyl, methylene or a single bond, andn is an integer of 1 to 4.