Abstract: In an image forming apparatus, in the case where a time necessary for a developer bearing member to rotate from a measurement position where an attracting unit attracts the toner on the developer bearing member to a developing position at which an electrostatic latent image on the photosensitive member is developed by a toner on the developer bearing member is represented by a time Tqcm, a time necessary for the photosensitive member to rotate from an exposure position at which an exposure unit exposes the photosensitive member to the developing position is represented by a time Tetd, and a time necessary for a control unit to control an exposing condition based on a charge amount measured by a measuring unit is represented by a time Tp, the attracting unit is disposed so that Tqcm?Tedt+Tp holds true.

Abstract: A detection device configured to detect a charge amount of toner on a developer carrier includes an assembly with a quartz oscillator and having a first surface and a second surface that are provided in the quartz oscillator. The first surface has a recess and a projection formed in a direction in which the quartz oscillator vibrates. In addition, a capacitor is connected to the assembly, a first measurement unit measures a potential difference between two ends of the capacitor, and a second measurement unit measures a frequency of the quartz oscillator. In a case where an alternating-current power is applied to the assembly, the direction in which the quartz oscillator vibrates is parallel to the first surface.

Abstract: In a detection device, in a case where toner on a developing material carrier is caused to adhere to an electrode, a controller connects an assembly havin a quartz oscillator to a first capacitor using a first switch and connects the assembly to a second capacitor using a second switch; and in a case where a detection unit detects the oscillation frequency of the quartz oscillator, the controller disconnects the assembly from the first capacitor using the first switch and disconnects the assembly from the second capacitor using the second switch.

Abstract: A detection device configured to detect a charge amount of toner on a developer carrier, comprises: an assembly including a quartz oscillator and having a first surface and a second surface that are provided in the quartz oscillator, the first surface having a recess and a projection formed in a direction in which the quartz oscillator vibrates; a capacitor connected to the assembly; a first measurement unit configured to measure a potential difference between two ends of the capacitor; and a second measurement unit configured to measure a frequency of the quartz oscillator, wherein in a case where an alternating-current power is applied to the assembly, the direction in which the quartz oscillator vibrates is parallel to the first surface.

Abstract: At detection device, in the case where the toner on the developing material carrier is caused to adhere to the first electrode, the controller connects the assembly to the first capacitor using the first switch and connects the assembly to the second capacitor using the second switch; and in the case where the second detection unit detects the oscillation frequency of the quartz oscillator, the controller disconnects the assembly from the first capacitor using the first switch and disconnects the assembly from the second capacitor using the second switch.

Abstract: In an image forming apparatus, in the case where a time necessary for a developer bearing member to rotate from a measurement position where an attracting unit attracts the toner on the developer bearing member to a developing position at which an electrostatic latent image on the photosensitive member is developed by a toner on the developer bearing member is represented by a time Tqcm, a time necessary for the photosensitive member to rotate from an exposure position at which an exposure unit exposes the photosensitive member to the developing position is represented by a time Tetd, and a time necessary for a control unit to control an exposing condition based on a charge amount measured by a measuring unit is represented by a time Tp, the attracting unit is disposed so that Tqcm?Tedt+Tp holds true.

Abstract: An image forming apparatus includes a first index forming unit that forms a plurality of first electrostatic latent image indexes at positions adjacent to a toner image to be formed on a recording material in a width direction of a first image bearing member and a second index forming unit forms a plurality of second electrostatic latent image indexes at positions adjacent to a toner image to be formed on the recording material in a width direction of a second image bearing member. A control unit controls operation of at least a second image forming unit so as to maintain a set positional relationship between the first electrostatic latent image indexes transferred to an intermediate transfer member and the second electrostatic latent image indexes based on detection results by first and second detection units.

Abstract: An image forming apparatus includes movable first and second image bearing members, latent image forming units that form electrostatic latent images and latent index patterns, a movable belt member contacting the image bearing members, toner image transfer members that transfer toner images, obtained by depositing toner on the latent images, onto the belt member, latent pattern detectors that detect the latent index patterns, an adjusting portion that adjusts relative positions between the latent index patterns on the basis of detection results of the detectors, and a setting portion that sets a latent pattern transfer voltage, during image formation, on the basis of a detection result of one of the latent pattern detectors on condition that a plurality of test voltages are applied to one of the latent pattern transfer member during non-image formation.

Abstract: A first and second electrostatic image code is located outside a developing zone. A transfer belt provided with an electrostatic image recording track capable to transfer the electrostatic code between the first drum and second drum. A transferring voltage applies to a side of the transfer belt for the first drum to transfer the first electrostatic image code onto the electrostatic image recording track. An electroconductive member is in parallel with the electrostatic image code and a surface of the electrostatic image code detected within a predetermined gap. An induced current generated in the electroconductive member relative to the lines of the electrostatic image codes which control the first drum or the second drum on the basis of a detection result of the detecting means such that the toner image on the second drum transferred onto a recording material on the transfer belt and overlaid on the toner image transferred onto the recording material from the first drum.

Abstract: A rotational speed of an image bearing member on a downstream side is controlled so as to reduce a detection time difference between a leading end section of first electrostatic latent image indexes of an image bearing member and a leading end section of second electrostatic latent image indexes of a transfer medium in an area of a leading end margin preceding an effective image area.

Abstract: An image forming apparatus includes a plurality of image bearing members; an electrostatic image forming portion; a belt member; an electrostatic image transfer member for transferring an electrostatic index image, onto an electrostatic image transfer area located adjacent to an image area of a toner image with respect to a widthwise direction of the belt member, formed on the upstreammost image bearing member with respect to a rotational direction of the belt member; an antenna potential sensor for detecting an induced current of the electrostatic index image; a controller for controlling superposition of the toner images through detection of the electrostatic index image; and a setting portion on the basis of a detection result of the electrostatic index image which is formed during non image formation.

Abstract: An image forming apparatus includes a first drum; first code forming means for forming a first electrostatic image code outside a developing zone for a toner image; a second drum; second code forming means for forming a second electrostatic image code outside the developing zone for the toner image; a transfer belt provided with an electrostatic image recording track capable of holding the first electrostatic image code transferred from the first drum to the second drum; transferring means for applying a voltage to a side of the transfer belt which is opposite a side contactable to the first drum to transfer the first electrostatic image code onto the electrostatic image recording track; detecting means including an electroconductive member provided which is parallel with the electrostatic image code and which is spaced from a surface of the electrostatic image code of the electrostatic image recording track to be detected with a predetermined gap, and a detecting portion for detecting an induced current gene

Abstract: An image forming apparatus includes first and second image bearing members on which toner images are to be formed, a conveying member, and a conveying member position index detecting device for detecting a conveying member position index provided on the conveying member. The apparatus also includes an image bearing member position index detecting device for detecting image bearing member position indices provided on the second image bearing member, an adjusting device for adjusting a rotational speed of the second image bearing member, and a controller for controlling the adjusting device so as to adjust a position of an image bearing member position index correspondingly to the conveying member position index, on the basis of detection results of the conveying member position index detecting device and the image bearing member position index detecting device.

Abstract: The image forming apparatus includes a plurality of photosensitive members, a plurality of exposure portions to perform exposure on the plurality of photosensitive members, a development portion to form a toner image at the plurality of photosensitive members, a transfer medium to which the respective toner images formed on the plurality of photosensitive members are sequentially transferred so as to form an image, and a position correction portion to perform position correction by moving at least one photosensitive member among the plurality of photosensitive members, and the position correction of the photosensitive member is performed by swinging the photosensitive member by the position correction portion having a line on a circumference surface of the photosensitive member corresponding to an exposure position of the exposure portion as the center axis.

Abstract: The image forming apparatus includes a plurality of photosensitive members, a plurality of exposure portions to perform exposure on the plurality of photosensitive members, a development portion to form a toner image at the plurality of photosensitive members, a transfer medium to which the respective toner images formed on the plurality of photosensitive members are sequentially transferred so as to form an image, and a position correction portion to perform position correction by moving at least one photosensitive member among the plurality of photosensitive members, and the position correction of the photosensitive member is performed by swinging the photosensitive member by the position correction portion having a line on a circumference surface of the photosensitive member corresponding to an exposure position of the exposure portion as the center axis.

Abstract: A sheet material conveying apparatus for conveying a sheet material under attraction to a conveying belt has an attraction unit for attracting the sheet material to the conveying belt, and which exerts a attraction in succession from a front end to a rear end of the sheet material in a conveying direction thereof and from a position in the front end toward both ends in the direction of width, or in succession from an end at either side in the direction of width of the sheet material and a front end in the conveying direction thereof toward a rear end thereof, and from the either end toward an end at the other side.

Abstract: An image forming apparatus includes first and second image bearing members on which a toner images are to be formed; a conveying member onto which the toner images are to be transferred; a conveying member position index detecting device for detecting a conveying member position index provided on the conveying member along the movement direction of the conveying member; an image bearing member position index detecting device for detecting the image bearing member position indices provided on the second image bearing member along a rotational direction of the second image bearing member; an adjusting device for adjusting a rotational speed of the second image bearing member; a controller for controlling the adjusting device so as to adjust a position of an image bearing member position index correspondingly to the conveying member position index, on the basis of detection results of the conveying member position index detecting device and the image bearing member position index detecting device; and an initial

Abstract: A color filter manufacturing apparatus of this invention includes a plurality of ink-jet heads (120a, 120b, 120c) each having a first ink discharging nozzle group (108) in which the pitch of a plurality of ink discharging nozzles in the Y-axis direction is set to be equal to the pitch of pixels of the same color in the Y-axis direction, and a second ink discharging nozzle group having a nozzle pitch set to be equal to the pixel pitch in the Y-axis direction like the first ink discharging nozzle group. Control of an ink discharging operation is performed for only one of the first and second ink discharging nozzle groups which is to be used to color pixels of corresponding colors on a substrate (1).

Abstract: A liquid jet recording apparatus includes a liquid jet head including discharge ports, element substrates, a base substrate, common liquid chambers, and a head liquid chamber. The apparatus also includes a first liquid supply path that leads from a liquid reserve tank to a liquid indraft orifice provided on the base substrate via a pump, a second liquid supply path that leads from a liquid outflow orifice provided on the base substrate to a sub-tank, a third liquid supply path that leads from the sub-tank to a liquid indraft orifice provided on the head liquid chamber, a fourth liquid supply path that leads from a liquid outflow orifice provided on the head liquid chamber to the liquid reserve tank or the sub-tank, and a fifth liquid supply path that leads from the sub-tank to the liquid reserve tank to return the liquid from the sub-tank to the liquid reserve tank.

Abstract: A method of manufacturing a color filter having a plurality of colored pixels on a substrate by discharging an ink from an ink-jet head having a plurality of ink discharging nozzles while performing relative movement of the ink-jet head and the substrate, includes the step of dividing the plurality of ink discharging nozzles for discharging the ink having a same color into a plurality of nozzle groups, each nozzle group including every N nozzles, with N being a positive integer. In coloring one substrate by performing the relative movement a plurality of times, an ink discharging operation is performed such that inks are discharged by using only one nozzle group of the plurality of nozzle groups in the plural relative movements, and ink discharging nozzles which are used in a subsequent relative movement always include all of, or part of, ink discharging nozzles which have been used in a previous relative movement.