Abstract: Example safety mechanisms for example printing apparatuses are provided. An example printing apparatus may include at least one linear guide disposed on a first surface of a back-spine section of a printer body and a top chassis portion coupled to the at least one linear guide. In some examples, the top chassis portion may include a laser safety casing. In some examples, the laser safety casing may comprise a laser module configured to emit a laser beam along a laser path and a safety cover that is moveable to a first cover position intersecting the laser path.

Abstract: A drying device includes a contact heater unit to contact and heat a medium. The contact heater unit includes a plurality of heating members each having a curved contact face to contact the medium among plural heating members of the plurality of heating members to contact a first surface of the medium opposite a second surface of the medium on which liquid is applied. The plurality of heating members includes a first heating member and a plurality of second heating members. The first heating member has a maximum contact distance to contact the medium. The plurality of second heating members is disposed upstream from the first heating member in a direction of conveyance of the medium. Two heating members of the plurality of second heating members immediately upstream from the first heating member in the direction of conveyance of the medium contact the first surface of the medium.

Abstract: A recording method includes an ink application process of applying ink to a record medium and a cover layer formation process of forming a cover layer by applying a liquid composition containing polyurethane resin particles to the record medium to which the ink is applied in such a manner as to be at least partially overlapped with a region to which the ink is applied, in which the breaking strength of the cover layer is 0.1 N or more and the breaking elongation of the cover layer is 200% or more.

Abstract: A recording medium heating apparatus includes a plurality of heat rollers disposed in a feeding path of a recording medium and having respective heating units; and a control unit controlling temperatures of the heating units so that the temperature of a first heat roller is lower than the temperature of a second heat roller. Further, the first and the second heat rollers are included in the plurality of heat rollers and the first heat roller is disposed on the upstream side of the second heat roller in the feeding path.

Abstract: A recording medium heating apparatus includes a plurality of heat rollers disposed in a feeding path of a recording medium and having respective heating units; and a control unit controlling temperatures of the heating units so that the temperature of a first heat roller is lower than the temperature of a second heat roller. Further, the first and the second heat rollers are included in the plurality of heat rollers and the first heat roller is disposed on the upstream side of the second heat roller in the feeding path.

Abstract: The invention relates to a heat exchange laminate for use as a heat exchange member in a heat exchange unit, comprising a base layer extending substantially planar, said base layer being bilaterally coated with a contact layer. The contact layer is electrical conductive and is substantially non-metallic. At least one of the contact layers has an embossed contact surface. The invention further relates to the use of the heat exchange laminate and to a heat exchange unit and a printing system comprising such a heat exchange laminate.

Abstract: An image forming apparatus is provided, which includes a displacement member disposed at a cartridge and configured to move from a position where the displacement member receives a driving force from an apparatus main body to a position where the displacement member does not receive the driving force. The apparatus also includes a movable member disposed at the apparatus main body, the movable member moving in response to movement of the displacement member, so as to move a first electrode between a position where the first electrode contacts a second electrode and a position where the first electrode is spaced apart from the second electrode. Also, the apparatus includes a detector detecting information about the cartridge attached to the apparatus main body based on a conduction state between the first electrode and the second electrode.

Abstract: There is provided an image forming apparatus including plural photosensitive members on which developer images are formed by supplying developer to electrostatic latent images, respectively, an exposure device which illuminates light beams onto surfaces of the photosensitive members to form the electrostatic latent images, respectively. The developer images on the respective photosensitive numbers are transferred to a transferred medium which is moved in a moving direction while contacting the respective photosensitive members. The exposure device is configured such that a beam diameter of light beam exposing a most-upstream photosensitive member in the moving direction on a surface of the most-upstream photosensitive member is larger than a beam diameter of light beam exposing a most-downstream photosensitive member in the moving direction on a surface of the most-downstream photosensitive member.

Abstract: A laser induced thermal imaging apparatus and a fabricating method of organic light emitting diodes using the same, which laminate an acceptor substrate and a donor film using a magnetic force in vacuum, and are used to form a pixel array on the acceptor substrate. A substrate stage includes a magnet or magnetic substance. The acceptor substrate has a pixel region for forming first, second, and third sub-pixels, and the donor film has an organic light emission layer to be transferred to the pixel region. A laser oscillator irradiates a laser to the donor film. A contact frame is adapted to be disposed between the substrate stage and the laser oscillator, and is used to form a magnetic force with the substrate stage. The contact frame includes an opening through which the laser passes. A contact frame feed mechanism moves the contact frame in a direction of the substrate stage.

Abstract: An electronic apparatus includes a main body; a maintenance member operated by an operator for maintenance; and a hand touch member disposed on the maintenance member. The hand touch member is formed of a conductive material, and is connected to a ground portion disposed in the main body.

Abstract: The image forming apparatus is provided with: an image forming unit that forms an image on a medium; a speed changing unit that changes an image forming speed of the image forming unit; a detecting unit that detects a state quantity indicating a state of the image on the medium formed by the image forming unit; and an adjusting unit that adjusts an image forming condition set by the image forming unit according to a detection result of the state quantity detected by the detecting unit and a target value for the state quantity. The adjusting unit changes the target value for the state quantity according to the state quantity detected by the detecting unit after the speed changing unit changes the image forming speed.

Abstract: A customer replaceable unit installable in a printing apparatus comprises a component requiring high voltage electric power for operation, a low voltage power input, and that cooperates with the low voltage power input in order to transform low voltage electric power from the low voltage power input into high voltage electric power for use by the component. The customer replaceable unit may also include a low voltage signal input, and the high voltage power supply unit controls output of the high voltage electric power in response to signals received at the low voltage signal input. The signals received at the low voltage signal input are independent of a type of the component in the customer replaceable unit, and the high voltage power supply unit provides an appropriate high voltage for the type of the component, thereby allowing modification of the type of component without having to provide a different low voltage signal.

Abstract: A method and apparatus usable in an image forming apparatus, comprising a photoreceptor, and a plurality of exposing devices having a plurality of light emitting elements arranged therein for exposing the photoreceptor, wherein the plurality of exposing devices include at least two exposing devices having a distribution tendency similar to the plurality of light emitting elements.

Abstract: A method of creating a digital mask in situ for use in a process of making digital flexographic printing elements. The digital mask is created by laminating the negative image that is the by-product of a thermal proofer to a photosensitive printing plate. Thereafter, the photosensitive printing element can be imaged, exposed, and developed in the usual manner.

Abstract: In a copier having an image data converter that sets the C density, the M density and the Y density to a density obtained by multiplying the density of black in the RGB system by a CMY mixture ratio and sets the K density to a density obtained by multiplying the density of black by a K mixture ratio when black in the RGB system is converted into the CMYK system, the image data converter sets the K mixture ratio to a K reference mixture ratio when TK<PHK, and sets the K mixture ratio to a K high mixture ratio that is higher than the K reference mixture ratio when TK?PHK. Here, TK is a K toner amount of consumption insufficiency which is a K toner amount to be consumed to prevent toner deterioration at the driving amount of the developing unit, and PHK is a K high predetermined value.

Abstract: A developer cartridge provided in an image-forming device has a developer side casing that includes a toner-accommodating chamber and a developing chamber; and a plate wall disposed in the developing chamber for partitioning a thickness-regulating blade from the toner-accommodating chamber. When a thickness-regulating blade scrapes excess charged toner off the developing roller, the plate wall prevents this charged toner from returning to the toner-accommodating chamber. A flexible wiper for cleaning toner detection windows is attached to an agitator for stirring toner in the toner-accommodating chamber via a fixing member. The fixing member includes a support plate and a gripping plate disposed opposite each other with a slit formed therebetween. The wiper is inserted into the slit and is fixed to the fixing member when a boss protruding from a restricting plate becomes inserted into a through-hole formed in the wiper.

Abstract: An image forming apparatus which can prevent degradation of image quality in a case where dot patterns for preventing the formation of image stripes are superimposed on respective developed images corresponding to image signals. Developed images are formed on a photosensitive drum using developers of respective different colors based on image information. The developed images formed on the photosensitive drum are transferred onto an intermediate transfer belt. For each of the developed images of the respective colors, a number of dot developed images which are minute dot-shaped images formed in a dispersed manner are transferred onto the intermediate transfer belt.

Abstract: An electrostatic latent image is formed by controlling the amount of light, the emission time, and the like, considering the spot diameters of a laser, without changing the charging bias, the developing bias, and the like so as to obtain a plurality of correlations between density patches and development contrasts faithfully representing the developing characteristics of an image forming apparatus in a short time.

Abstract: An image forming apparatus including an image bearing member, a charging unit for charging the image bearing member, and an image exposure unit including a light emitting portion for emitting light to form an electrostatic image. The image forming apparatus also includes a developing unit including a toner carrying member and a bias controlling unit for applying a bias voltage to the toner carrying member, the developing unit being effective to develop the electrostatic image with toner by a potential difference between the toner carrying member and the electrostatic image, a potential difference determining unit, and a storing unit for storing a light amount control value, corresponding to the potential difference, set on a basis of a light emission amount information inherent to the light emitting portion. The image exposure unit reads the light amount control value and controls the light amount based on the light amount control value.

Abstract: A customer replaceable unit installable in a printing apparatus comprises a component requiring high voltage electric power for operation, a low voltage power input, and that cooperates with the low voltage power input in order to transform low voltage electric power from the low voltage power input into high voltage electric power for use by the component. The customer replaceable unit may also include a low voltage signal input, and the high voltage power supply unit controls output of the high voltage electric power in response to signals received at the low voltage signal input. The signals received at the low voltage signal input are independent of a type of the component in the customer replaceable unit, and the high voltage power supply unit provides an appropriate high voltage for the type of the component, thereby allowing modification of the type of component without having to provide a different low voltage signal.

Abstract: An image forming apparatus, forming an image by two-dimensionally fast and slow-scanning and exposing with light that has been modulated in accordance with image data representing an image and visualizing an electrostatic latent image with toner, includes a calculating unit that divides an image region in a fast-scanning direction into plural regions and calculates image data amounts to be used for image formation in the image data per each of the plural regions, and a correcting unit that corrects, on the basis of the calculation result of the calculating unit, unevenness of density in the fast-scanning direction in the toner image resulting from a distance between a position where the toner is supplied to a developing roll and a position where the toner is supplied to each of the plural regions.

Abstract: A thermal development device including: a thermal development section for heating to develop a latent image formed on a light-sensitive surface of a photothermographic material; a cooling section for cooling the photothermographic material passed the thermal development section under a condition that a cooling rate for a light-insensitive surface of the photothermographic material is faster than the cooling rate for the light-sensitive surface of the photothermographic material; and a conveyance section in which the photothermographic material is conveyed via the thermal development section and the cooling section, and the length of the conveyance path that passes the cooling section is not more than 1.5 times the length of the conveyance path that passes the thermal development section.

Abstract: A set of color toners for use in an electrophotographic image forming device is disclosed. The set of color toners include a cyan toner having high cyan pigment load, a magenta toner having a high magenta pigment load, and a yellow toner having a high yellow pigment load. An electrophotographic image forming device includes the set of color high pigment load toners, a black toner, a controls system architecture for an electrophotographic process controller or image output terminal having a first setting to deliver a partial amount of color toners to a target media and having a second setting to deliver complete amount of color toners to said target media. A method of creating photographic and text images in an electrophotographic image forming device includes providing a set of color toners.

Abstract: An image processing apparatus, comprising: an exposing device for exposing an image forming material so as to form a latent image on the image forming material based on image data; a developing device for developing and visualizing the latent image on the exposed image forming material so as to form an image; a measuring device for measuring the image density of the image on the developed image forming material; a calibrating device for forming a table to define a relation between an image signal and image density on the basis of plural different test image data and measured-image densities thereof; a storing device for storing a characteristic change model indicating a characteristic change of at least one of the exposing device and the developing device with time; a difference calculating device to calculate a density difference on the basis of the characteristic change model between the time of forming the table and the time of forming an image based on image signal of diagnostic image data; and a correcti

Abstract: A heating control method of a heat development recording device includes a heating step in which after start-up of the heat development recording device, a heat development section is heated to a target temperature by a plate heater, a temperature holding step in which after the temperature of the plate heater has reached the target temperature, the target temperature is held for a prescribed time, and a step in which after the target temperature has been held for the prescribed time, the heat development section is set up in the recordable state, wherein after start-up of the heat development recording device, operation history information from the time of the last start-up is collected; and after reaching the target temperature at the time of the present start-up, a temperature holding time is determined depending upon the operation history information.

Abstract: In a thermal development method for generating a image from a latent image recorded on an image formation layer of a photosensitive photothermographic recording material, by means of heating the photosensitive photothermographic recording material, a first surface, which is one surface of the photosensitive photothermographic recording material A, and a second surface, which is the remaining surface of the same, are heated; and a total amount of heat applied to the second surface is controlled so as to fall within a range of 100±30 when a total amount of heat applied to the first surface is taken as 100 in connection with the respective total amounts of heat which are applied to the image formation layer from the first and second surfaces and equal to and higher than the development reaction temperature.

Abstract: A thermal development apparatus comprises: a photothermographic recording material feed section that contains a supply tray in the photothermographic recording material feed section, the supply tray being for containing a photothermographic recording material; an exposure section that subjects the photothermographic recording material to exposure; a first conveyance section that conveys the photothermographic recording material from the supply tray to the exposure section; a thermal development section that effects thermal development of the photothermographic recording material; a second conveyance section that conveys the photothermographic recording material from the exposure section to the thermal development section; a cassette storage section that contains a cassette, the cassette being for containing a double-sided photothermographic recording material having image forming layers on both sides of the double-sided photothermographic recording material; and a third conveyance section that conveys the dou

Abstract: In a thermal development method for generating an image from a latent image recorded on an image formation layer of a photosensitive photothermographic recording material, by means of heating the photosensitive photothermographic recording material, a first surface, which is one surface of the photosensitive photothermographic recording material, and a second surface, which is the remaining surface of the same, are heated; and wherein a second total amount of heat applied to one surface of the first and second surfaces, the one surface having a larger contact area, is controlled so as to be a value of 80 or less when a first amount of heat applied to the other surface having a smaller contact area is taken as 100, wherein the first and second amounts of heat are total amounts of heat applied to the image formation layer from the first and second surfaces, respectively.

Abstract: In a thermal development method for generating a image from a latent image recorded on an image formation layer of a photosensitive photothermographic recording material, by means of heating the recording material, a first surface, which is one surface of the recording material, and a second surface, which is the remaining surface of the same, are heated; and wherein a second total amount of heat applied to one surface of the first and second surfaces, the one surface being on the side of one unit having a higher heat conductivity of first and second heating units, is controlled so as to be a value of 80 or less when a first amount of heat applied to the other surface is taken as 100, wherein the first and second amounts of heat are total amounts of heat applied to the image formation layer from the first and second surfaces, respectively.

Abstract: A thermal development recording apparatus has a recording portion for exposing a thermal development recording material to form a latent image, a thermal-developing portion for heating the thermal development recording material to execute a thermal development, and a cooling portion for cooling the thermal development recording material after the thermal development, which further has a temperature adjusting portion for adjusting a temperature of the thermal-developing portion based on temperature of the cooling portion. Therefore, the thermal development recording apparatus can maintain a density constant independent of the number of sheets of thermal development recording materials and also maintaining a color tone, whose change cannot be suppressed by adjusting an amount of exposure, constant to thereby stabilize both the density and the color tone.

Abstract: An image-recording apparatus. In a housing of the apparatus are a casing section that encases a light and heat sensitive recording material, an optical recording section that exposes the light and heat sensitive recording material fed from the casing section to record a latent image, a thermal developing section that develops the latent image by heating, an optical fixing section that fixes the developed image by irradiating it with light, and an outlet through which the image-recorded material is taken out.

Abstract: A thermal development apparatus capable of preventing thermal development failure because of improvement on a characteristic required of a resilient member. The thermal development apparatus has: a heating section for heating thermal development photosensitive material within which a latent image is established, and maintaining temperature of the thermal development photosensitive material at thermal development temperature; and a conveyance section for conveying the thermal development photosensitive material with the heating section, wherein the heating section has a cylindrical sleeve, a heat source provided inside of the cylindrical sleeve, and a resilient member on an external surface of the cylindrical sleeve, and the resilient member has a smooth layer as an outermost layer thereof.

Abstract: An image forming apparatus includes an exposure portion having a light source, for forming a latent image on a photothermographic imaging material by exposing a light beam, a thermal development portion having a heating portion for thermally developing by heating the photothermographic imaging material on which the latent image is formed, and a cooling and conveying portion for conveying and cooling the thermally developed photothermographic imaging material, a temperature detecting member for detecting at least one of a temperature of a predetermined portion concerning the cooling and conveying portion, and a temperature in a vicinity of the exposure portion, and a control unit for controlling a factor relating to thermal development on a basis of the temperature detected by the temperature detecting member.

Abstract: There is described a thermal development apparatus, which makes it possible to prevent generation of density variations caused by changes of the processing temperature during the thermal developing operation when the thermal developing photosensitive material is continuously processed, without increasing the cost of the apparatus so much. The thermal development apparatus includes a thermal developing processor to apply a thermal development processing to the thermal developing photosensitive material, a detector to detect the thermal developing photosensitive material to be conveyed into the thermal developing processor and a controller to control the thermal developing processor in a feed forward controlling mode based on a processing condition of the thermal developing processor. The processing condition is established in advance, corresponding to a load of processing the thermal developing photosensitive material detected in advance by the detector.

Abstract: A color thermal printer includes a photo fixer, which is constituted by a Braun tube. An electron beam gun emits electron. A fluorescent screen is excited by the electron, for generating near ultraviolet rays or ultraviolet rays. An image on thermosensitive recording material is fixed by application of the near ultraviolet rays or ultraviolet rays.

Abstract: An apparatus for adapting a smaller toner cartridge for use in laser printers or copiers which otherwise accept and use only larger toner cartridges. The apparatus expands the width of the cartridge.

Abstract: Image deterioration due to contact of a cleaning roller and a photosensitive member when an image forming operation stops can be prevented. When the image forming operation stops, a photosensitive belt is stopped in a condition that a stop position of the photosensitive belt corresponds to a photosensitive belt cleaning roller. Even if a stain is caused in the stop position of the photosensitive belt by the contact with the photosensitive belt cleaning roller, an image is formed in an image region of the photosensitive belt, separate from the stop position, in the image forming operation and the image is not deteriorated by the stain.

Abstract: A thermal processor having a contaminant removal system. The system includes a heated drum for heat developing exposed heat developable media which emit airborne contaminants during the development; a plurality of rollers located about a circumferential segment of the drum to hold an exposed media in contact with the drum; an enclosure for enclosing the heated drum and plurality of rollers, the enclosure including a first upper curved member spaced from and enclosing the rollers and the upper portion of the drum and a second lower curved member spaced from and enclosing the lower portion of the drum, the first and second curved members having first ends spaced from each other and defining a film entrance region, and further having second ends spaced from each other and defining a film exit region; wherein the first upper curved member includes a curved duct having a first opening above the rollers and a second opening configured to direct gaseous fluids away from the film exit from the drum.

Abstract: An image forming device in which, even if exposure processing and developing processing are carried out simultaneously, offset at a time of scanning-exposure in an exposure section, which is caused by relatively rough conveying in a developing section, can be eliminated. Attention is focused on rigidity of a sheet-shaped recording material. A guide plate of a conveying section is bent such that elastic repulsion is generated, and a predetermined frictional force with respect to a driving roller is generated by the elastic repulsion. Thus, even if the driving roller vibrates due to an external disturbance or non-uniform driving occurs, vibration or the like can be absorbed by movement of the recording material in a thickness direction thereof. Thus, conveying of the recording material is not directly affected, and conveying can be stabilized.

Abstract: The card printing system of the present invention includes a cartridge sub-assembly and a printer sub-assembly. The cartridge sub-assembly encloses a stack of horizontally positioned cards that have each been plied with photosensitive microcapsules. The printer sub-assembly interfaced with the cartridge sub-assembly to obtain a card from the stack. The printer sub-assembly then forms a latent image upon the photosensitive microcapsules upon the obtained card and develops that image by applying a mechanical pressure to the photosensitive microcapsules with a developer array. The develop array is a block containing a number spring-loaded developer balls.

Abstract: An image forming method comprising exposing a heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide having a silver iodide content of 5 to 100 mol %, a light-insensitive organic silver salt, a heat developing agent, and a binder by means of a scanning optical system having a light source emitting a laser beam having an emission peak between 350 nm and 450 nm to form a latent image on said heat-developable light-sensitive material, heating said heat-developable light-sensitive material to about 80 to 250° C. in a heat development section, and cooling said heat-developable light-sensitive material having been heat treated in said heat development section to or below a development stopping temperature while said heat-developable light-sensitive material is transported in a cooling section.

Abstract: A heat development apparatus (21) which heats a heat-developable sheet (A) having an exposure-development latent image formed therein while being conveyed therethrough so that the latent image is developed, characterized in that a heat development section (IV) includes a heating device (37) for heating the heat-developable sheet (A), a hold-down roller (38) disposed opposed to the heating device (37) for pressing the heat-developable sheet (A) against the heating device (37), and a temperature adjusting device (39) for raising the temperature of the hold-down roller (38) to a predetermined value.

Abstract: A thermal processor having a contaminant removal system. The system includes a heated drum for heat developing exposed heat developable media which emit airborne contaminants during the development; a plurality of rollers located about a circumferential segment of the drum to hold an exposed media in contact with the drum; an enclosure for enclosing the heated drum and plurality of rollers, the enclosure including a first upper curved member spaced from and enclosing the rollers and the upper portion of the drum and a second lower curved member spaced from and enclosing the lower portion of the drum, the first and second curved members having first ends spaced from each other and defining a film entrance region, and further having second ends spaced from each other and defining a film exit region; wherein the first upper curved member includes a curved duct having a first opening above the rollers and a second opening configured to direct gaseous fluids away from the film exit from the drum.

Abstract: A heat developing apparatus for developing a heat-processable photo-sensitive material having a supply unit provided with a loading section for loading the heat-processable photo-sensitive material, an exposure unit for forming a latent image based on an image signal or on a predetermined signal for density measurement, a developing unit for heat development, a device for gaining density information of the heat-processable photo-sensitive material developed, and a controller for conducting a correction for a density of the heat-processable photo-sensitive material based on a desired density and the density information, by controlling at least one of the exposure unit and the developing unit, wherein, the controller conducts the correction according to the density information when a predetermined condition is satisfied after a new package incorporating the heat-processable photo-sensitive material has been loaded on the loading section.

Abstract: An optical scanning apparatus includes a light source unit, a deflecting unit for deflecting and scanning a light beam from the light source unit, and a scanning optical system for scanning the light beam deflected by the deflecting unit on a surface to be scanned. The scanning optical system includes a diffraction portion having an aspherical function in a sub-scanning direction.

Abstract: A laser beam isolation apparatus of a laser printer includes a blocking portion formed on the laser scanning unit to be moved between a blocking position to block a passing hole of the laser scanning unit and an open position to open the passing hole, a guide portion mounted in the laser scanning unit relative to the blocking portion, guiding the blocking portion to move between the blocking position and the open position, and an operating portion formed on the developer unit. The operating portion is operated to move the blocking portion along the guide portion. During a removal of the developer unit, the blocking portion that blocks a laser beam of a laser diode from being emitted out of the laser scanning unit is moved to the blocking position by its own weight.

Abstract: An image-recording system with a first conveying path along which a light and heat sensitive recording material is conveyed from an accommodating cassette at an accommodating section toward a pair of conveying rollers, a second conveying path along which the recording material is conveyed forward and backward through an optical recording section and a heat-developing section, and a third conveying path along which the recording material, after development of an image thereon, is conveyed to an optical fixing section.

Abstract: In a heat developing apparatus having a heat applying member to thermally developing a photothermographic element by bringing the heat applying member into contact with the photothermographic element conveyed at a predetermined processing speed, and a guide surface to guide the element to a developing section, or a guide surface to guide the element from the developing section to the downstream portion in the developing section covered by a housing, at least either one of the guide surfaces is structured by a material having a low heat conductivity such as, for example, a heat insulating material.

Abstract: An apparatus and method are provided for fusing toner to a print medium. According to one embodiment, the apparatus includes a laser source optically coupled to a predefined position in a print medium pathway. A laser beam generated by the laser source is directed to fall upon the print medium shuttled along the print medium pathway. Finally, a laser controller is coupled to the laser source to control the laser beam to generate a predefined fusing exposure of the laser beam on the print medium.

Abstract: Image deterioration due to contact of a cleaning roller and a photosensitive member when an image forming operation stops can be prevented. When the image forming operation stops, a photosensitive belt is stopped in a condition that a stop position of the photosensitive belt corresponds to a photosensitive belt cleaning roller. Even if a stain is caused in the stop position of the photosensitive belt by the contact with the photosensitive belt cleaning roller, an image is formed in an image region of the photosensitive belt, separate from the stop position, in the image forming operation and the image is not deteriorated by the stain.