Abstract: A reader writer (communication device) executes at least one of reading identification information stored in an IC tag and writing the identification information to the IC tag. The reader writer includes: a wireless control circuit that generates output for communication; a temperature sensor (temperature detector) that detects a temperature in an environment in which an RFID chip, balun, filter circuit, power amplifier, and coupler (elements for forming the wireless control circuit) are used; a temperature judging unit that judges whether or not the environment in which the element is used falls within a usable temperature range of the element based on the temperature detected by the temperature sensor; and a wireless power supply controller that suppresses a supply of power to the wireless control circuit when the temperature judging unit judges that the element is not in the environment within the usable temperature range.

Abstract: A reader writer (a communication device) executes at least one of reading identification information of an IC tag (an identification component) and writing the identification information to the IC tag. The reader writer includes a CPU board (a control board) that includes CPU (a controller) and a wireless control circuit to output radio waves by a command from the CPU, an antenna that is spaced from the CPU board, and a connection cable that electrically connects the CPU board to the antenna. The CPU board includes a disconnection detector that detects a disconnection of the connection cable, and a transmission controller that interrupts an output from the wireless control circuit to the antenna when the disconnection detector judges that the connection cable is disconnected.

Abstract: A reader writer (communication device) executes at least one of reading identification information stored in an IC tag and writing the identification information to the IC tag. The reader writer includes: a wireless control circuit that generates output for communication; a temperature sensor (temperature detector) that detects a temperature in an environment in which an RFID chip, balun, filter circuit, power amplifier, and coupler (elements for forming the wireless control circuit) are used; a temperature judging unit that judges whether or not the environment in which the element is used falls within a usable temperature range of the element based on the temperature detected by the temperature sensor; and a wireless power supply controller that suppresses a supply of power to the wireless control circuit when the temperature judging unit judges that the element is not in the environment within the usable temperature range.

Abstract: A reader writer (a communication device) executes at least one of reading identification information of an IC tag (an identification component) and writing the identification information to the IC tag. The reader writer includes a CPU board (a control board) that includes CPU (a controller) and a wireless control circuit to output radio waves by a command from the CPU, an antenna that is spaced from the CPU board, and a connection cable that electrically connects the CPU board to the antenna. The CPU board includes a disconnection detector that detects a disconnection of the connection cable, and a transmission controller that interrupts an output from the wireless control circuit to the antenna when the disconnection detector judges that the connection cable is disconnected.

Abstract: An image forming apparatus includes a moving roller capable of axial movement; a medium end position detecting section for detection in the main scanning direction; and a control section for calculating the amount of misalignment of the medium from the detected end position; wherein the control section obtains the correction amount of the image forming position of the medium according to the amount of misalignment of the medium having been calculated, or the amount of misalignment of the medium and information of moving position of the roller, and provides control such that the medium or another medium coming later than the medium by a predetermined number of pages is moved by the moving roller by the difference between the correction amount of the image forming position and the amount of misalignment of the target medium, and the image forming position is corrected according to the correction amount.

Abstract: An image forming apparatus includes an image carrier for carrying a toner image, a drive device for driving the image carrier at a predetermined speed, a control device for giving instruction to the drive device to perform predetermined operation, and a transfer device for nipping a recording sheet with a rotary member at the position opposed to the image carrier and for transferring the toner image on the image carrier onto the recording sheet, wherein the control device gives instruction to the drive device to generate a variation having a phase which is reverse to a phase of a variation given to the predetermined speed of the image carrier by a vibration produced at the time of passage of the recording sheet between the image carrier and the transfer device.

Abstract: An image forming apparatus provided with an image forming section forming a reference mark at the position being away from the leading edge of the front surface of a sheet by a prescribed length, and forming an image for the front surface based on the forming position of the reference mark, a transfer sheet reversing section reversing the sheet, a leading edge detection sensor detecting the leading edge of the rear surface of the sheet and a mark detection sensor detecting the forming position of the reference mark on the sheet based on the leading edge of the rear surface of the transfer sheet, and the image forming section forms an image on the rear surface of the transfer sheet based on the forming position of the reference mark on the sheet whose reference point is the leading edge of the rear surface of the transfer sheet.

Abstract: An image forming apparatus for forming an image on a transfer sheet based on image data, comprises an operating section to determine a setup about a margin region on which an image is not formed at an edge portion of the transfer sheet, a control section to determine an inner region having a specified width and being adjacent to the determined margin region as a density change region in which an image density is changed, and determines a more inner region located inward more from the density change region as a regular density region in which an image is formed with a regular image density, and an image forming section to form an image in the density change region based on image data on the condition where the image density is reduced and to form an image in the regular density region based on image data without changing the image density.

Abstract: There is described a paper sheet conveyance apparatus, which makes it possible to surely separate the overlapping paper sheets from each other irrespective of a kind of paper. The apparatus includes: a thickness detecting section to detect a thickness of a paper sheet, currently conveyed in the conveyance path; a first suction device to adsorb the conveyance paper sheet currently passing through the first suction device; a second suction device to adsorb the overlap paper sheet currently passing through the second suction device; an overlapping conveyance path that is branched from the conveyance path; and a control section that activates the first suction device and the second suction device so as to separate the conveyance paper sheet from the overlap paper sheet, and to introduce the conveyance paper sheet and the overlap paper sheet into the conveyance path and the overlapping conveyance path, respectively.

Abstract: An image forming apparatus having a main body unit for forming an image on a recording medium, connectable to at least one post-processing unit for performing post-processing for the recording medium on which the image is formed, the image forming apparatus includes, a current value acquiring portion for acquiring at least one of a calculated value of a current and a measured value of the current as a value of the current flowing through the main body unit, and a control portion for selecting an operation mode from a plurality of operation modes each having a distinct value of current flowing through the main body unit.

Abstract: An image forming apparatus, comprises an image carrying member for carrying a toner image; a drive section for driving the image carrying member at a predetermined speed; a transfer section for forming a transfer region with the image carrying member therebetween in which the transfer section nips a sheet of recording paper with the image carrying member so as to transfer the toner image on the image carrying member to the sheet of recording paper; a memory section for memorizing control data to suppress speed fluctuation which is caused on the image carrying member when the sheet of recording paper passes the transfer region; and a control section to control the drive section based on the control data memorized in the memory section such that the drive section applies torque with a phase reverse to that of the speed fluctuation onto the image carrying member.

Abstract: A sheet conveying apparatus provided with the first pair of rollers and the second pair of rollers which are positioned in the same axis perpendicular to a fixed direction, and convey a sheet in the conveying direction by rotating while nipping the sheet, the first drive section which drives the first pair of rollers and the second drive section which drives the second pair of rollers, the first detection section which detects a skew angle of the sheet against the conveying direction and a position of an edge part of the sheet in a direction perpendicular to the conveying direction before the sheet is conveyed by the pairs of rollers, and the control section which changes at least one of the rotating speeds based on the detected skew angle, and controls a timing to change the rotating speed based on the detected position of an edge part.

Abstract: An image forming apparatus includes an image carrier for carrying a toner image, a drive device for driving the image carrier at a predetermined speed, a control device for giving instruction to the drive device to perform predetermined operation, and a transfer device for nipping a recording sheet with a rotary member at the position opposed to the image carrier and for transferring the toner image on the image carrier onto the recording sheet, wherein the control device gives instruction to the drive device to generate a variation having a phase which is reverse to a phase of a variation given to the predetermined speed of the image carrier by a vibration produced at the time of passage of the recording sheet between the image carrier and the transfer device.

Abstract: An image forming apparatus comprising: an image forming section to form a toner image based on print data; a transfer section to transfer the toner image onto a transfer sheet; a fixing section to fix the toner image transferred onto the transfer sheet; a cleaning section for cleaning at least one of the image forming section, the transfer section and the fixing section; and a control section to determine an existence area of a real image in a print image based on the print data, to determine a size of the transfer sheet, onto which the print image is printed and to control the cleaning device based on determinations of the image determination section and the transfer sheet size determination section.

Abstract: An image forming apparatus includes a moving roller capable of axial movement; a medium end position detecting section for detection in the main scanning direction; and a control section for calculating the amount of misalignment of the medium from the detected end position; wherein the control section obtains the correction amount of the image forming position of the medium according to the amount of misalignment of the medium having been calculated, or the amount of misalignment of the medium and information of moving position of the roller, and provides control such that the medium or another medium coming later than the medium by a predetermined number of pages is moved by the moving roller by the difference between the correction amount of the image forming position and the amount of misalignment of the target medium, and the image forming position is corrected according to the correction amount.

Abstract: In order to shorten a time for preliminary original reading which is performed prior to reading of an original image, an image reading apparatus of the present invention scans an original mounted on a platen glass by a scan optical system that moves to the original and reads a scanned image of the original by using a CCD sensor, the apparatus having a function to perform a preliminary original read operation for automatically deciding a density of the original before the reading operation of the original image, wherein the preliminary original reading is performed while the scan optical system in an idling state is moving from a read standby position to an image read operation start position; a white background level correction operation of the CDD sensor is performed after collection of original density data by the preliminary original read operation; and a result of the correction is reflected on the original density data obtained by the preliminary original reading to control the decision of the original d

Abstract: An image forming apparatus for forming an image on a transfer sheet based on image data, comprises an operating section to determine a setup about a margin region on which an image is not formed at an edge portion of the transfer sheet, a control section to determine an inner region having a specified width and being adjacent to the determined margin region as a density change region in which an image density is changed, and determines a more inner region located inward more from the density change region as a regular density region in which an image is formed with a regular image density, and an image forming section to form an image in the density change region based on image data on the condition where the image density is reduced and to form an image in the regular density region based on image data without changing the image density.

Abstract: An image forming apparatus provided with an image forming section forming a reference mark at the position being away from the leading edge of the front surface of a sheet by a prescribed length, and forming an image for the front surface based on the forming position of the reference mark, a transfer sheet reversing section reversing the sheet, a leading edge detection sensor detecting the leading edge of the rear surface of the sheet and a mark detection sensor detecting the forming position of the reference mark on the sheet based on the leading edge of the rear surface of the transfer sheet, and the image forming section forms an image on the rear surface of the transfer sheet based on the forming position of the reference mark on the sheet whose reference point is the leading edge of the rear surface of the transfer sheet.

Abstract: An image forming apparatus comprising: an image forming section to form a toner image based on print data; a transfer section to transfer the toner image onto a transfer sheet; a fixing section to fix the toner image transferred onto the transfer sheet; a cleaning section for cleaning at least one of the image forming section, the transfer section and the fixing section; and a control section to determine an existence area of a real image in a print image based on the print data, to determine a size of the transfer sheet, onto which the print image is printed and to control the cleaning device based on determinations of the image determination section and the transfer sheet size determination section.

Abstract: An image forming apparatus having a main body unit for forming an image on a recording medium, connectable to at least one post-processing unit for performing post-processing for the recording medium on which the image is formed, the image forming apparatus includes, a current value acquiring portion for acquiring at least one of a calculated value of a current and a measured value of the current as a value of the current flowing through the main body unit, and a control portion for selecting an operation mode from a plurality of operation modes each having a distinct value of current flowing through the main body unit.