Abstract: A transparent film for forming, e.g., a toner image thereon is provided as an optically transparent sheet member having an opaque part. During the image forming, the position and conveyance state of the transparent film are detected optically by utilizing the opaque part. After the image formation, the opaque part is cleared by (i) detaching the opaque part under heating, or (ii) clarifying the opaque part by heating and/or light illumination. Accordingly, the opaque part required for image forming does not adversely affect the final transparent film product, such as an overhead projection film. The clearing of the opaque part may be performed, e.g., along with the fixation of the toner image onto the transparent film.

Abstract: An ink-jet recording paper sheet for ink-jet recording with on-demand type heads having a multi-nozzle comprises a recording layer formed on one face of a base paper sheet to give a basis weight of the recording paper of from 150 to 250 g/m.sup.2 with a coating color which contains a pigment and a binder, the pigment containing synthetic silica having a BET specific surface area ranging from 250 to 500 m.sup.2 /g at a content of not less than 80% by weight of the pigment, the binder containing casein and styrene-butadiene rubber, the weight ratio of the pigment to the binder ranging from 1.8 to 2.4, the recording layer having coating solid in an amount ranging from 15 to 25 g/m.sup.2, and surface roughness by ten-point-hight of the recording layer ranging from 0.5 to 5 .mu.m, and the paper sheet being curled at a maximum curling height ranging from 0 to 20 mm in A4 paper size with the printed face upside.

Abstract: An image formation apparatus is disclosed, capable of forming an image on both surfaces of a recording medium. The image formation apparatus is provided with the latent image forming unit for forming an unfixed image on the photosensitive drum, the transfer drum for transferring the unfixed image onto the recording medium, and an oil application device for applying a release agent onto the fixing roller. The release agent applied upon fixing the first surface is different in quantity from that applied upon fixing the second surface and the releasing agent applied to the fixing rotor during single side fixing is different in quantity than when both surfaces are to be fixed. The releasing agent quantity also differs depending on whether the apparatus is in cassette feed mode or manual feed mode and is not applied when the recording medium is in contact with the fixing roller.

Abstract: An image forming apparatus comprises: an image forming unit to form an image onto a recording medium; a measuring unit to measure a density of the image formed on the recording medium; a controller to execute an image stabilizing control to decide image forming conditions of the image forming unit on the basis of the image density measured by the measuring unit; a heater to heat a load by supplying a current to the image forming apparatus; and a detector to detect a temperature of the load which is heated by the heater, wherein the controller controls the execution of the image stabilizing control in accordance with an output of the detector at the start of the power supply to the apparatus. When the detected temperature of the load is less than a predetermined value, the image stabilizing control is executed. When it is equal to or higher than the predetermined value, the image stabilizing control is not performed.

Abstract: An image light-transmitting transparent film comprises a first transparent resin layer which is a base film; and a second transparent resin layer, the surface of which is a roughened surface which can be smoothed out by heating and pressure, in which the roughened surface of the second transparent resin layer is formed of a second transparent resin and particles of a resin soluble into the second transparent resin.

Abstract: An image forming apparatus includes a manual sheet feeder for permitting a recording material to be manually fed; cassette feeder for feeding a recording material from a cassette; an image forming device for forming an image on the fed recording material; double side mode selector for selecting a double side mode in which the images are formed on both surfaces of the recording material; wherein the image forming device is conditioned for forming the images on both surfaces, when the manual feeder is in manual feeding state, and the double side mode is selected by the double side mode selecter.

Abstract: An image forming apparatus includes an image forming unit for forming an image on a recording medium, and a measurement unit which measures the density of the image formed on the recording medium. A control unit determines an operation condition of the image forming unit on the basis of the measurement result from the measurement unit. A storage unit stores the operation condition determined by the control unit, and a display unit reads out the operation condition at a predetermined time for display. The control means controls a subsequent operation of the image forming apparatus according to the stored operation condition.

Abstract: A cleaning member carrying porous particles for absorbing a parting agent is used in an electrophotographic apparatus having a fixation unit in which a developer image transferred to a transfer member is fixed by a fixation rotary member to which the parting agent is applied, and means for forming an image on two surfaces of the transfer member.

Abstract: This invention relates to a rotary member for fixing having an elastic layer; an off-set preventive layer as the rotary member surface layer; and an intermediate layer having silicone varnish provided between the elastic layer and the off-set preventive layer.

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: This invention relates to a fixing device with a heat rotatory body heated by a heating source having a surface layer of a silicone rubber; a back-up rotatory body which is in pressure contact with the heated rotatory body; an oil feeding apparatus which feeds silicone oil to the heated rotatory surface; the pair of rotatory bodies performing fixing while conveying the supporting material having unfixed images supported thereon sandwiched therebetween; and the feeding oil being a phenyl type silicone oil and the silicone rubber surface being impregnated with dimethylsilicone oil.

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: The present invention provides an image forming apparatus including an image bearing member; image forming devices for forming a toner image on the image bearing member, the average volume particle diameter of the toner being 3-10 .mu.m; a movable transfer sheet bearing member for bearing a transfer sheet; and a transfer member for transferring the toner image formed on the image bearing member onto the transfer sheet carried by the transfer sheet bearing member at a transfer station. The transfer member includes a fiber brush engageable by the transfer sheet bearing means at a side opposite to the image bearing member at the transfer station.

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: 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: A fixing device includes a fixing rotating member for grasping and conveying a recording material supporting an unfixed image, and a coating means for coating release oil on the fixing rotating member.The rotating member includes an elastic layer and an offset prevention layer provided on the elastic layer.An oil absorption rate of the elastic layer for the oil is 5-20 wt %, and an oil absorption rate of the offset prevention layer for the oil is 30-150 wt %.

Abstract: A method of and an apparatus for recording an image on a recording medium. A heat-sensitive sheet having a light-transmissive base sheet provided with a heat-fusible supercooled substance layer is made to abut a copy original such that the heat-fusible supercooled substance layer faces the original image to be copied while flashlight is projected onto the base sheet of the heat-sensitive sheet. Thus, the image portion of the copy original to be copied absorbs the light transmitted through the heat-sensitive sheet and thereby generates heat so that an adhesive area containing a pattern corresponding to the original image is formed on the supercooled substance layer. After the heat-sensitive sheet has been removed from the copy original, such an adhesive area is transferred to the recording medium owing to the adhesiveness of the adhesive area.

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.