Abstract: A fluid ejection and scanning system includes a fluid ejection assembly. The assembly includes a first plurality of photosensors, and a first plurality of ejection elements. Each of the ejection elements is configured to cause fluid to be ejected when the ejection element is activated. Each one of the photosensors in the first plurality is coupled to a respective one of the ejection elements for activating the ejection element. A second plurality of photosensors captures image data to generate a digital image of a media. A first light source of the system emits a light beam. A control system scans the light beam across the printhead assembly and selectively illuminates the photosensors in the first plurality, thereby activating the ejection elements coupled to the illuminated photosensors.

Abstract: An image forming apparatus having a photosensitive member, an exposure device having a laser emitting element that irradiates a laser beam, the laser beam being scanned on the photosensitive member line by line to form an electrostatic latent image on the photosensitive member, a developing device that supplies a developing agent to the electrostatic latent image to form a visible image, and a controller that controls the laser emitting element to irradiate the laser beam in a predetermined light amount. The controller further controls the laser emitting element to irradiate the laser beam in a reduced light amount every at least one line.

Abstract: An electrophotographic apparatus achieves miniaturization thereof and improvement of image quality. The shape of an optical scanning device mount frame mounting an optical scanning device is trapezoidal, and asymmetrical with respect to a center line thereof, and a short side part and a long side part are attached to a first and second frames of the apparatus, respectively. A space for attaching parts is available on the side of the first frame, and a driving device is placed inside the first frame so that the apparatus can be miniaturized. Since the optical scanning device mount frame is asymmetrical with respect to the center line thereof, as compared with one having a symmetrical shape, an eigenvalue of vibration can be shifted to a high frequency, and the mount frame is resistant to vibrate. Thus, the fluctuation of a light beam is suppressed, and the image quality can be improved.

Abstract: In a picture reading device having a light emitting element that obliquely irradiates the surface of a paper with light, an area sensor that reads its irradiated area as a picture in which information related to a paper is read on the basis of the read results, the light irradiating element is arranged with an angle so as to irradiate the light from a direction oblique to a conveying direction of the paper. As a result, the picture reading device of the present invention eliminates such a problem that the same paper surface is received as a different image depending on the incident direction of the light, and the information related to an object to be read cannot be accurately read.

Abstract: A device for holding a sheetlike article on a movable underlying surface for transporting the sheetlike article in at least one direction selected from the group consisting of a direction into and a direction out of an operating station having a printing unit, includes a member having a surface underlying the sheetlike article, the sheetlike article being retainable by pneumatic pressure on the surface, a screening device disposed locally fixedly with respect to an operating station, the screening device serving for reducing an airflow in a region of the printing unit at least with respect to adjacent regions, the reduction in the airflow resulting from the sheetlike article being held on the underlying surface.

Abstract: An image forming apparatus having a photosensitive member, an exposure device having a plurality of laser emitting elements that each irradiate a laser beam onto the photosensitive member to form an elactrostatic latent image on the photosensitive member, a developing device that supplies a developing agent to the electrostatic latent image to form a visible image, and a controller that controls the irradiation of the plurality of laser emitting elements. The controller includes a determining device that determines which laser emitting element from the plurality of laser emitting elements is closest to reaching its end of operating life and a restricting device that restricts the irradiation of the laser emitting element determined closest to reaching its end of operating life.

Abstract: An image forming method wherein a surface of a photoconductor having a photoconductive layer provided on a conductive support is scanned at least along a main scanning direction of the photoconductor with a writing light beam having a wavelength of &lgr; &mgr;m and a spot diameter &phgr; &mgr;m to form an electrostatic latent image thereon. The surface of the photoconductor has such a roughness that the sectional curve thereof along the main scanning direction is represented by a function y=f(x) when the main scanning direction and the direction of the vertical height are assumed to be the X-axis and the Y-axis, respectively. The maximum height of the sectional curve in a region from an arbitral position x on the X-axis to a position (x+&phgr;) on the X-axis is at least &lgr;/2n &mgr;m where n is a refractive index of the photoconductive layer at the wavelength of the light beam.

Abstract: An image forming apparatus includes a supporting member extended between first and second frames and supporting an exposure unit, wherein the primary resonance frequency of the supporting member is higher than that of a mirror provided in the exposure unit, whereby the supporting member is prevented from being caused to resonate by oscillation generated in the driving system of the apparatus main body to thereby prevent the mirror from oscillating.

Abstract: An electrophotographic apparatus achieves miniaturization thereof and improvement of image quality. The shape of an optical scanning device mount frame mounting an optical scanning device is trapezoidal, and asymmetrical with respect to a center line thereof, and a short side part and a long side part are attached to a first and second frames of the apparatus, respectively. A space for attaching parts is available on the side of the first frame, and a driving device is placed inside the first frame so that the apparatus can be miniaturized. Since the optical scanning device mount frame is asymmetrical with respect to the center line thereof, as compared with one having a symmetrical shape, an eigenvalue of vibration can be shifted to a high frequency, and the mount frame is resistant to vibrate. Thus, the fluctuation of a light beam is suppressed, and the image quality can be improved.

Abstract: The invention provides an image forming apparatus comprising: an electrophotographic photoreceptor having a conductive substrate and a photosensitive layer provided on the conductive substrate; a charging unit for charging the electrophotographic photoreceptor; an exposure unit for exposing the charged electrophotographic photoreceptor to light thereby forming an electrostatic latent image; a developing unit for developing the electrostatic latent image with toner thereby forming a toner image; and a transfer unit for transferring the toner image from the electrophotographic photoreceptor to a transferred image-receiving medium, wherein said exposure unit is a multi beam exposure unit which has a surface emitting laser array and which carries out the electrostatic latent image formation by scanning the electrophotographic photoreceptor with eight or more light beams; and wherein said electrophotographic photoreceptor gives a quantum efficiency of 0.

Abstract: An image forming apparatus for forming an image by irradiating a charged surface of a photosensitive member with a laser beam depending on a picture signal to form an electrostatic latent image, visualizing the latent image with a recording agent, and transferring the visualized image onto a recording medium; includes a circumferential position detection unit for detecting a circumferential position of the photosensitive member irradiated with the laser beam and an APC circuit for controlling a light quantity of the laser beam so as to provide a target light quantity varying depending on the detected circumferential position.

Abstract: An image formation method for forming an image containing an embossed portion of an expandable material on a recording medium, comprising converting height information about an embossed image which is the image of the embossed portion to the same density information as one used to indicate a density of a non-embossed image which is not raised, and controlling an amount of the expandable material formed on the recording medium according to the converted density information.

Abstract: An optical recording apparatus includes a light source, a scanner, and a phase shift controller. The light source emits a light beam controlled to be lit on and off in synchronism with a pixel clock signal according to input image data. The scanner reforms the light beam emitted by the light source into a cyclic scanning light beam scanning in a main scanning direction a photosensitive surface moving in a sub-scanning direction. The phase shift controller performs an image magnification correction by a phase change for changing a phase of the pixel clock signal in units of one nth of a cycle of the pixel clock signal at one or more positions on the photoconductive surface in the main scanning direction, in which n is an integer greater than one. A method and apparatus of optical image forming is also described.

Abstract: The image forming apparatus is provided with a driving circuit board for driving an apparatus main body, a control circuit board for controlling the apparatus main body, and an image controller board for controlling image data, in which the driving circuit substrate and the image controller board are arranged substantially vertically, and the control circuit board is arranged substantially horizontally. Consequently, a high-frequency wiring part can be shortened, and reduction of radiation field noises and costs for coping with the noises can be realized. Moreover, since heat radiation efficiency increases, deterioration of components and degradation of an image quality due to increase in temperature inside the apparatus can be prevented.

Abstract: A phase shift element having a central area (for transmitting part of an incident laser beam in the vicinity of the beam central axis) and a first area (giving the laser beam incident thereon a phase difference &pgr; relative to a beam passing through the central area) is placed on an optical path between a laser light source and a polygon mirror of a scanning optical system. The scanning optical system including such a phase shift element is installed in a printer. By the effect of the phase shift element, the intensity of side lobes (several rings of light accompanying the main beam) is prevented from exceeding a threshold value even when optical surfaces of an imaging optical system of the scanning optical system have certain microscopic undulations, by which black stripes occurring in halftone printing can be eliminated.

Abstract: An image forming apparatus, which includes a photoreceptor having a substrate whose surface having been subjected to a surface processing with a cutting tool, and a photosensitive layer formed on the substrate; an exposure device for exposing an image on the photoreceptor to form a latent image, having a light source for emitting a light beam, and carrying out exposure in a manner of dot arrangement through a main scanning by the deflection of the light beam and a sub-scanning by a movement of the photoreceptor; a developing device; and a transfer device. The apparatus is characterized in that the exposure device carries out scanning exposure with a spatial frequency of dot arrangement pitch of not less than 4 dots/mm in the main scanning direction, and surface roughness Rz of the substrate in the main scanning direction is not greater than 1.5 &mgr;m.

Abstract: The image forming device has a recording unit which records an image data line by line while scanning a recording medium with a laser; a memory circuit for storing the image data corresponding to a plurality of lines of the image data; an operation circuit for dividing the image data stored in the memory circuit per line into blocks and generating an image data block having the number of pixels corresponding to an amount of skew with respect to a main scan line direction of the laser from the recording unit; and a control circuit for selecting pixel data from the image data block in corresponding two blocks of the adjacent two lines and combining the image data block and the selected pixel data to produce a line data to be supplied to the recording unit.

Abstract: Provided is a small-sized electrophotographic apparatus for which maintenance such as disposal of a jam of sheets, replacement of consumables including toner, or replacement of components to be periodically replaced can be facilitated.

Abstract: An image forming apparatus is constructed to include an image bearing member which is rotatably supported to bear a toner image, a light beam scanning section to simultaneously scan the image bearing member by a plurality of light beams so as to form an electrostatic latent image, a developing section to develop the electrostatic latent image into the toner image, a transfer section to transfer the toner image onto a recording medium, and an ON start timing adjuster to adjust an ON start timing of one of the plurality of light beams, based on an image tone of each of a plurality of patterns of an image pattern formed by the light beam scanning section.

Abstract: This invention provides an optical writing device to be supported at a predetermined position in an image forming apparatus, as well as an image forming apparatus provided with the optical writing device. The optical writing device has a support unit supporting an optical writing head. The support unit includes a first block and a second block supporting one end and the other end of the LED writing head, respectively, and a connecting member interconnecting the first block and the second block while maintaining a positional relationship between the first block and the second block. The connecting member of the support unit is made most easily deformable among the parts constituting the optical writing device.

Abstract: A plurality of types of engine units which have nonvolatile storage units and which have different performances, respectively, can be attached to an image formation apparatus main body in a replaceable manner. A control unit which controls the performance of an overall apparatus based on information stored in the storage units provided in the engine units, respectively, which are attached to the image formation apparatus main body, is provided in the image formation apparatus main body. Therefore, even if the image formation apparatus main body is common, the performance of the overall apparatus related to recording speed or resolution can be changed only by replacing the engine units different in performance. It is also possible to easily deal with various types of apparatuses.

Abstract: An image quality detecting apparatus detects image quality based on a specified image pattern formed on an image carrier. This apparatus includes a light-emitting device that radiates a spotlight on the image carrier, a lens, a scanning unit that scans the image pattern with the spotlight, and a photoelectric conversion element that detects a quantity of light reflected from the image pattern and the image carrier or light transmitted through the image pattern and the image carrier during the scanning. The image quality is detected by setting a diameter of the spotlight at least in a scanning direction to the reciprocal number of a spatial frequency or smaller in which human eyesight is the most sensitive, for example, to 1000 &mgr;m or less.

Abstract: An optical scanning device condenses a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scans the surface to be scanned by the beam spot. At least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame, wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.

Abstract: An image forming apparatus has at least a photoconductor, a charger, and an irradiator for irradiating a light for optically writing in on the photoconductor to form a latent electrostatic image using a process for electrophotography in which a resolution of the optical writing in operation is 1200 dpi or more. Further, the optical writing operation is performed using a laser beam having a diameter of 35 &mgr;m or less. The photoconductor is provided with at least a charge generating layer containing a charge generating substance and a charge transporting layer containing a charge transporting substance. The charge transporting layer has a carrier mobility of 1×10−5 cm2·V−1·sec−1 or more under an electric field of 3×10−5 V·cm−1.

Abstract: When power is turned on in an apparatus, respective units and devices in the apparatus such as a heat roller of a fixing device are initialized and a scanning position control is performed by which positional errors in a main scanning direction and in a sub-scanning direction of a plurality of light beams are converged to respective predetermined values or less, and the apparatus is brought into a standby state. In this standby state, a control between sheets is performed every several seconds, for example. The control between sheets means a control of changing a beam position, for example, in the sub-scanning direction by a minimum amount of adjustment, if necessary. In this manner, the beam position in the sub-scanning direction is always controlled at an optimum position and when a copy start button is pressed down, a copying operation can be immediately started.

Abstract: An image forming apparatus having a photosensitive member, an exposure device having a plurality of laser emitting elements that each irradiate a laser beam onto the photosensitive member to form an elactrostatic latent image on the photosensitive member, a developing device that supplies a developing agent to the electrostatic latent image to form a visible image, and a controller that controls the irradiation of the plurality of laser emitting elements. The controller includes a determining device that determines which laser emitting element from the plurality of laser emitting elements is closest to reaching its end of operating life and a restricting device that restricts the irradiation of the laser emitting element determined closest to reaching its end of operating life.

Abstract: An image forming device that electrostatically writes directly to print media is disclosed. A printer, for example, includes an electrostatic imaging mechanism and a toner transfer mechanism. The electrostatic imaging mechanism writes an electrostatic image directly onto a print media. The toner transfer mechanism transfers toner onto the print media onto which the electrostatic image has been written.

Abstract: An image forming apparatus for forming an image by irradiating a charged surface of a photosensitive member with a laser beam depending on a picture signal to form an electrostatic latent image, visualizing the latent image with a recording agent, and transferring the visualized image onto a recording medium; includes a circumferential position detection unit for detecting a circumferential position of the photosensitive member irradiated with the laser beam and an APC circuit for controlling a light quantity of the laser beam so as to provide a target light quantity varying depending on the detected circumferential position.

Abstract: An electrophotographic photoreceptor including a photosensitive layer on an electroconductive substrate, wherein nitrate ion is present on the surface of the photosensitive layer in an amount of from 50 to 300 &mgr;g per 1 m2 of the surface of the photosensitive layer when the nitrate ion is determined by an ion chromatographic method. Preferably a material having a fluorine atom and a carbon atom or a fatty acid metal salt such as zinc stearate is further present on the surface of the photosensitive layer such that the F/C ratio is from 0.05 to 0.5 or the Zn/C ratio is from 0.001 to 0.1. An image forming apparatus using the photoreceptor is also provided.

Abstract: An image forming method including charging an upper surface of a photoconductor having a photoconductive layer with a charger located in contact with or spaced apart a distance of not greater than 100 &mgr;m from the upper surface, and scanning the charged upper surface with a light beam having a wavelength of &lgr; &mgr;m and a spot diameter &PHgr; &mgr;m to form an electrostatic latent image thereon. The upper surface of the photoconductor and a lower surface of the photoconductive layer have such roughness that the maximum heights in a unit length of &PHgr; &mgr;m give minimum values R1 and R2, respectively, satisfying the following conditions: R1≦&lgr;/2n &mgr;m, R2≦&lgr;/2n &mgr;m and (R1+R2)≧&lgr;/2n &mgr;m.

Abstract: An image forming apparatus, which includes a photoreceptor having a substrate whose surface having been subjected to a surface processing with a cutting tool, and a photosensitive layer formed on the substrate; an exposure device for exposing an image on the photoreceptor to form a latent image, having a light source for emitting a light beam, and carrying out exposure in a manner of dot arrangement through a main scanning by the deflection of the light beam and a sub-scanning by a movement of the photoreceptor; a developing device; and a transfer device. The apparatus is characterized in that the exposure device carries out scanning exposure with a spatial frequency of dot arrangement pitch of not less than 4 dots/mm in the main scanning direction, and surface roughness Rz of the substrate in the main scanning direction is not greater than 1.5 &mgr;m.

Abstract: The image forming apparatus is provided with a driving circuit board for driving an apparatus main body, a control circuit board for controlling the apparatus main body, and an image controller board for controlling image data, in which the driving circuit substrate and the image controller board are arranged substantially vertically, and the control circuit board is arranged substantially horizontally. Consequently, a high-frequency wiring part can be shortened, and reduction of radiation field noises and costs for coping with the noises can be realized. Moreover, since heat radiation efficiency increases, deterioration of components and degradation of an image quality due to increase in temperature inside the apparatus can be prevented.

Abstract: A method of manufacturing a printer with an EL pixel array as a latent image light source, comprising: forming an EL pixel array on a substrate; separating the EL pixel array from the substrate; affixing the separated EL pixel array to substantially completely surround the outside of a photoconductive drum; forming a charge generating layer above the EL pixel array; and forming a charge transfer layer above the charge generating layer.

Abstract: An image forming and apparatus is provided in which a halftone density of an image is stabilized irrespective of a timing at which writing on scanning lines is started, even when using multiple laser beams. First, it is determined whether or not a portion exposed by adjacent laser beams (i.e., exposed by both of two beams simultaneously) is present. If the result of the determination is affirmative, it is then determined whether or not a portion adjacent to the exposed portion and not exposed by a laser beam is present. If the result of this determination is affirmative, exposure by fine dots is added to the portion not exposed by a laser beam.

Abstract: An electrophotographic photoreceptor having an interlayer between the electrically conductive base body and the photosensitive layer. The electrophotographic photoreceptor an aluminum-evaporated surface and contact potential difference of said interlayer with respect to the aluminum-evaporated surface of the photoreceptor is at least +0.175 V.

Abstract: A method for setting the amount of light in an array of light-emitting thyristors, each thyristor having I-L characteristic in which a luminous efficiency is decreased in a lower current field, is provided. According to the method, the amount of light emitted from a light-emitting thyristor is set so that a predetermined exposure energy may be obtained without decreasing a luminous efficiency of a light-emitting thyristor. The density D of a current to be supplied to the light-emitting thyristor to obtain a predetermined exposure energy is selected so as to satisfy the range of 3×Dth<D<100 MA/m2, wherein Dth is a threshold current density for light emission which is defined as a current density corresponding to the value of a current at a point where a tangent drawn at the value of a current corresponding to a current density of 50 MA/m2 with respect to the curve of the I-L characteristic intersects a current axis.

Abstract: An image forming apparatus compensating for printing density of a toner image by adjusting a quantity of image light to form the toner image in accordance with a variation of a resistance of a roller includes an electrical charge roller electrically charging a photosensitive drum, a laser scan unit projecting the image light on the photosensitive drum to form an electrostatic latent image corresponding to an input image, a development roller developing the electrostatic latent image formed on the photosensitive drum with toner to form the toner image, a transfer roller rotating in contact with the photosensitive drum and transferring the toner image to a sheet of printing paper when a predetermined voltage is supplied to the transfer roller, and a controller controlling the laser scan unit and varying the quantity of the image light projected from the laser scan unit in accordance with the variation of a resistance value of the transfer roller.

Abstract: The present invention generally relates to a printing apparatus including a marking device, the marking device being capable of placing an image on a sheet fed therein, and outputting the sheet; a feed path, by which sheets are fed from a sheet supply to the marking device; a duplex path, by which sheets output from the marking device are re-fed to the marking device; a first sensor, outputting a first position signal relating to a location of a side edge as each sheet passes through the feed path; a second sensor, outputting a second position signal relating to a location of a side edge as each sheet passes through the duplex path; and an image placement controller associated with the marking device, the image placement controller retaining first position signals for a plurality of sheets passing through the feed path and second position signals for a plurality of sheets passing through the duplex path, and calculating new average paper positions for each sheet in response to at least one of the first positi

Abstract: A method of manufacturing a printer with an EL pixel array as a latent image light source, comprising: forming an EL pixel array on a substrate; separating the EL pixel array from the substrate; affixing the separated EL pixel array to substantially completely surround the outside of a photoconductive drum; forming a charge generating layer above the EL pixel array; and forming a charge transfer layer above the charge generating layer.

Abstract: Primary scanning or other operation is not required by the light source of an internal exposure method, significantly improving the positioning of each color. An EL pixel array 134 is affixed as internal light source 124 to the entire surface of a photoconductive drum 114, and pixels controllable by TFT layer 144 are allocated to the entire image formation area of the photoconductive drum 114. Unlike with a conventional internal light source using an LED, a mechanism for moving in a primary scanning direction is therefore not needed and elements whereby the position of each color image shift are completely eliminated. As a result, there is absolutely no color shifting in full color images, and high quality images can be obtained.

Abstract: An optical scanning device for optically scanning a surface of a photoconductor to form an electrostatic latent image thereupon. The scanning device includes a light source to emit a light flux and pulse modulate the light flux. A deflector deflects the light flux from the light source. A scanning image formation element condenses the light flux deflected by the deflector to form a scanning beam spot on the scanned surface. The scanning beam spot scans the scanned surface to form the electrostatic latent image on the scanned surface. A stationary beam spot, formed by stationary light flux on the scanned surface, has a stationary beam spot diameter &ohgr;m in a main scanning direction that is smaller than a stationary beam spot diameter &ohgr;s in a sub-scanning direction.

Abstract: A method of activating an electrophotographic machine includes determining at least one condition of the electrophotographic machine. Power is applied to a polygon mirror. A time period required for the polygon mirror to accelerate from a stationary condition to a target rotational velocity is measured. The measured time period and data associated with the at least one condition are stored in a memory device. The polygon mirror is decelerated back to the stationary condition. Power is reapplied to the polygon mirror at a point in time. The measured time period and the data are used to determine when to begin at least one process in the electrophotographic machine relative to the point in time.

Abstract: A plurality of types of engine units which have nonvolatile storage units and which have different performances, respectively, can be attached to an image formation apparatus main body in a replaceable manner. A control unit which controls the performance of an overall apparatus based on information stored in the storage units provided in the engine units, respectively, which are attached to the image formation apparatus main body, is provided in the image formation apparatus main body. Therefore, even if the image formation apparatus main body is common, the performance of the overall apparatus related to recording speed or resolution can be changed only by replacing the engine units different in performance. It is also possible to easily deal with various types of apparatuses.

Abstract: An image forming apparatus is provided, with which it is possible to reduce the overall size of an apparatus. The image forming apparatus includes an image bearing member including a plurality of switching elements that are arranged in a moving direction and a generatrix direction of the image bearing member, and a latent image forming unit for forming a latent image on the image bearing member, the latent image forming unit including a voltage generating unit for generating a voltage in each switching element in accordance with an image signal.

Abstract: An electrophotographic apparatus is provided having an electrophotographic photosensitive member and exposure means for forming a static latent image on the electrophotographic photosensitive member surface by scanning with an exposure beam based on an image information. The spot diameter of the exposure beam is 2.5 times or more the size of one pixel of an image picture formed by the electrophotographic apparatus. The electrophotographic photosensitive member has the Fischer hardness of 240 Ns/mm2 or more in its surface, and the NESA sensitivity of 2000 V·cm2/&mgr;J or more, and is provided with an electric charge generating layer and an electric charge transportation layer 30 &mgr;m or less thick.

Abstract: When printing is effected on an obverse surface C1 of a copying paper sheet C, a scan position of a laser beam B on a photosensitive drum 20 is shifted by a first set amount in an axial direction of the photosensitive drum relative to a predetermined reference position. The first set amount corresponds to a positional displacement amount L1 of the copying paper sheet C, which occurs when the copying paper sheet C is first fed to the photosensitive drum 20. In addition, when printing is effected on a reverse, surface C2 of a copying paper sheet C, a scan position of the laser beam B on the photosensitive drum 20 is shifted by a second set amount in the axial direction of the photosensitive drum relative to a predetermined reference position. The second set amount corresponds to a positional displacement amount L2 of the copying paper sheet C, which occurs when the copying paper sheet C, the printing on the obverse surface of which has been finished, is fed once again to the photosensitive drum 20.

Abstract: A novel system is provided for automatically generating caution labels for moisture-sensitive semiconductor devices packed in drypack bags. The system has a scanner that scans a lot number or an ID mark representing ID information of a moisture-sensitive device sealed in a drypack bag, and a computing device with a look-up table containing moisture-sensitivity levels assigned to the moisture-sensitive devices. In response to an ID signal produced by the scanner, the computing device searches the look-up table for a moisture-sensitivity level assigned to the packed moisture-sensitive device. The determined moisture-sensitivity level is supplied by the computing device to a label-formatting device for generating a caution label indicating the moisture-sensitivity level. The label-formatting device controls a printer for printing the generated caution label.

Abstract: There is provided an image forming apparatus that is provided with photosensitive drums (11M), (11C), (11Y) and (11Bk) for forming latent images by irradiation of light reflected by a polygon mirror and a fixing device (40) for fixing toner images corresponding to the latent images on a sheet material to prevent deterioration of an image to be formed if reflective surfaces of a reflective polyhedron are thinned out in reducing a process speed of image formation. This apparatus is further provided with a control unit (35) for, if the number of surfaces of the polygon mirror is m (m is an integer of three or more), performing control for selecting n such that m/(n+1) does not make an integer as a relation between m and n and performing control for making n surfaces unused as a reflective surface of light among continuous n+1 surfaces of the reflective polyhedron in the decelerating image forming process.

Abstract: An image forming apparatus for forming an image on a photoconductor by scanning light on the photoconductor includes a printer engine having a polygon motor that can be controlled to revolve at an arbitrary rate of revolution, a deflector driven by the polygon motor to be rotated to deflect the light, and a motor controller to control the revolution of the polygon motor. The apparatus further includes a controller to control the apparatus. The apparatus is connected with a host computer, and the polygon motor is controlled to stop revolving when the apparatus is in a waiting status. When the apparatus is set to form the image with a single picture element resolution, the controller outputs to the printer engine a request to revolve the polygon motor immediately after receiving a printing instruction to form the image from the host computer and a printing request to form the image after completing image processing for forming the image.

Abstract: The present invention aims at providing an exposure device, image-forming device, and manufacturing method of the exposure device that can reduce a color deviation and form a high-quality multicolor image. An interval of dots in an LED array that is most likely to undergo a thermal influence by radiant and conductive heat from a fixer is made smaller beforehand, whereby the color deviation that would otherwise be produced by the image-forming device is reduced.