Abstract: Disclosed is an image forming apparatus, which makes it possible to reduce the frequency of image defect occurrences to a level as lower as possible by detecting abnormalities generated with age on the photoreceptor member and/or in the cleaning section, so as to suppress an amount of spoiled paper sheets and material. The image forming apparatus includes: a light source that is disposed at a position located between a cleaning section and a charging section, to emit an inspection light, which is to be irradiated onto a photoreceptor member over a main-scanning direction thereof; a tight-contact type image sensor that has a line image sensor to receive the inspection light reflected from a surface of the photoreceptor member; and a control section to determine a status of a surface of the photoreceptor member, based on a result of analyzing the inspection light receive by the line image sensor.

Abstract: Disclosed is an image forming apparatus, which makes it possible to reduce the frequency of image defect occurrences to a level as lower as possible by detecting abnormalities generated with age on the photoreceptor member and/or in the cleaning section, so as to suppress an amount of spoiled paper sheets and material. The image forming apparatus includes: a light source that is disposed at a position located between a cleaning section and a charging section, to emit an inspection light, which is to be irradiated onto a photoreceptor member over a main-scanning direction thereof; a tight-contact type image sensor that has a line image sensor to receive the inspection light reflected from a surface of the photoreceptor member; and a control section to determine a status of a surface of the photoreceptor member, based on a result of analyzing the inspection light receive by the line image sensor.

Abstract: Disclosed is an image forming apparatus to form an image on a paper, comprising: a main body section including a housing to house an apparatus to perform processing for the paper, and a control circuit to control the apparatus housed in the housing; and a peripheral apparatus provided separately from the main body section, which includes a hardware module having an electric component, and is connected to the control circuit so that communication therebetween is performed, and which is detachably provided to the housing, wherein a position at which the peripheral apparatus is provided to the housing can be changed, wherein the housing and the peripheral apparatus respectively include a conductive material, and the conductive material of the housing is grounded, and wherein when the peripheral apparatus is provided to the housing, the conductive material of the housing is conductive with the conductive material of the peripheral apparatus.

Abstract: A grip includes a grip body to be fitted on a mounting portion. The grip body includes an inner piece, an outer casing mounted on the inner piece, and a resin member fitted on the inner piece so as to be exposed through an opening, such as a hole or a cutout provided in the outer casing. The resin member is inserted in the outer casing so as to be partly exposed through the opening, and the inner piece is then inserted in the resin member fitted in the outer casing.

Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.

Abstract: A grip body including a mounting portion, an inner piece supported by the mounting portion and at least a resin communication passage therebetween. The inner piece includes inner and outer surfaces, and a resin layer is integrally formed on the inner and outer surfaces of the inner piece by resin extending therebetween through the resin communication passage. The grip body also includes at least one plate having an insertion rod formed thereon, the plate being fixed to the inner piece by insertion engagement of the insertion rod into the resin communication passage. The plate is heated by providing a heating member attached at a position where the heating of temperature of a resin surface portion of the grip body is desired.

Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.

Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is representing by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted

Abstract: An image forming apparatus for forming the image based on the image information on the prescribed surface of the transfer material, having an image forming section 8 to form benchmarks for image position identification at prescribed positions on the sheet, benchmark sensors 11 and 12 to detect the position of the benchmarks formed on the sheet and to output position information, a memory section 30 to memorize the position information detected by the mark sensors 11 and 12, and a control section 15 to carry out statistical processing of the position information memorized in the memory section 30 so as to understand tendency and characteristic of displacement amounts of the benchmarks analyzed quantitatively with time.

Abstract: A color image forming apparatus for forming a color image on a recording medium, includes: an image carrier; a polygon mirror; a signal forming device for forming a pseudo main scanning reference signal having a fixed cycle; and a controller for controlling image formation on a predetermined surface of the recording medium on the basis of the pseudo main scanning reference signal formed by the signal forming device and a main scanning reference signal which is formed by detecting a light beam that is scanned by the polygon mirror.

Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.

Abstract: An image forming apparatus including: a registration section which registers information on a diagnostic mode, where an operation mode to diagnose inside the image forming apparatus based on error information is assumed to be the diagnostic mode; an error detecting section which detects an error in the apparatus and outputs error information; and a control section which, when the error detecting section outputs error information, receives the information on the diagnostic mode corresponding to the error information from the registration section, and executes problem solution and recovery of the apparatus.

Abstract: A grip body including a mounting portion, an inner piece supported by the mounting portion and at least a resin communication passage therebetween. The inner piece includes inner and outer surfaces, and a resin layer is integrally formed on the inner and outer surfaces of the inner piece by resin extending therebetween through the resin communication passage. The grip body also includes at least one plate having an insertion rod formed thereon, the plate being fixed to the inner piece by insertion engagement of the insertion rod into the resin communication passage. The plate is heated by providing a heating member attached at a position where the heating of temperature of a resin surface portion of the grip body is desired.

Abstract: A grip includes a grip body to be fitted on a mounting portion. The grip body includes an inner piece, an outer casing mounted on the inner piece, and a resin member fitted on the inner piece so as to be exposed through an opening, such as a hole or a cutout provided in the outer casing. The resin member is inserted in the outer casing so as to be partly exposed through the opening, and the inner piece is then inserted in the resin member fitted in the outer casing.

Abstract: There is provided a controller that controls and drives the polygon mirror to a target speed with keeping a predetermined phase. When the controller controls the speed of the polygon mirror along with the image magnification adjustment, the controller controls the polygon mirror with a waiting time t1 from an end of the speed control of the polygon mirror for stabilizing before the phase control and a waiting time t2 from an end of the phase control of the polygon mirror for stabilizing, the t1 and t2 being set with a relation of t1<t2.

Abstract: There is provided a controller that controls and drives the polygon mirror to a target speed with keeping a predetermined phase. When the controller controls the speed of the polygon mirror along with the image magnification adjustment, the controller controls the polygon mirror with a waiting time t1 from an end of the speed control of the polygon mirror for stabilizing before the phase control and a waiting time t2 from an end of the phase control of the polygon mirror for stabilizing, the t1 and t2 being set with a relation of t1<t2.

Abstract: A color image forming apparatus for forming a color image on a recording medium, includes: an image carrier; a polygon mirror; a signal forming device for forming a pseudo main scanning reference signal having a fixed cycle; and a controller for controlling image formation on a predetermined surface of the recording medium on the basis of the pseudo main scanning reference signal formed by the signal forming device and a main scanning reference signal which is formed by detecting a light beam that is scanned by the polygon mirror.