Fuji Xerox Co., Ltd.

Hideki Moriya

Hidehiko Yamaguchi

Tsuyoshi Sunohara

Masao Ohmori

Chikaho Ikeda

Kiyofumi Aikawa

Takashi Hiramatsu

Michio Kikuchi

Masaki Hachisuga

Takahito Chiba

Kazuya Fukunaga

Akira Ishii

Kenji Ogi

Takanori Morino

Koichiro Shinohara

Kozo Tagawa

Masahiro Takamatsu

Hiroshi Sekine

Hiroki Ando

Seigo Makida

Takao Furuya

Tomokazu Kurita

Shinya Makiura

Yoshihisa Kitano

Takuro Hagiwara

Tomohiro Ono

Kazuyasu Sasuga

Toshie Nakamoto

Akihiro Ida

A transport monitoring control device includes

Transport monitoring control device and image forming apparatus

An image forming apparatus includes: a transport unit configured to pinch and transport a recording medium at a first transport speed, a fixing unit configured to fix an image formed on the recording medium while pinching and transporting the recording medium, which is transported by the transport unit, at a second transport speed, a driving unit configured to drive the fixing unit, a detector configured to detect a load of the driving unit, and a controller configured to perform a control to adjust a speed difference between the first transport speed and the second transport speed with respect to a subsequently transported recording medium when the load becomes larger than a reference value after a peak value of the load when the recording medium enters the fixing unit is detected by the detector.

Image forming apparatus and recording medium transport apparatus

A transport monitoring control device includes a transport unit configured to transport a recording medium while nipping the recording medium, a driving unit configured to drive the transport unit, a detector configured to detect a waveform related to a load of the driving unit when the recording medium enters the transport unit or is discharged from the transport unit, and a determining unit configured to determine whether the recording medium is skewed with respect to the transport unit, based on a waveform width at a height obtained by multiplying a peak value of the waveform by a predetermined coefficient.

An image is read from a recording medium via first and second optical imaging systems disposed such that respective reading regions partially overlap each other in a principal scanning direction on a reading surface. A sum of distances over which first and second images captured by the first and second optical imaging systems, respectively, are displaced in the principal scanning direction with respect to a reference point included in a region in which the reading regions overlap each other is calculated. First and second distances, over which the first and second images are displaced in the principal scanning direction, respectively, are calculated using the sum and first and second reading angles at which the first and second optical imaging systems, respectively, read the reference point. Positions of the first image and the second image in the principal scanning direction are corrected using the first distance and the second distance, respectively.

Image reading apparatus, image reading method, and non-transitory computer readable medium

Provided is a transport device including a first transport section that is driven at a first transport speed and transports a recording medium interposed therein, a second transport section that is driven at a speed different from the first transport speed, is located at a downstream of the first transport section in a transport direction, and transports the recording medium interposed therein, a detection section that detects variations in a driving load of the second transport section before and after the recording medium is discharged from the first transport section, and a derivation section that derives a thickness of the recording medium based on the variations.

Transport device and image forming apparatus

Provided is a transport device including a transport unit that transports a recording medium by interposing the recording medium, a driving unit that drives the transport unit, a detection unit that detects a peak value of a load of the driving unit when the recording medium is discharged from the transport unit, and a derivation unit that derives a thickness of the recording medium based on the peak value detected by the detection unit.

Transport device provided with mechanism for deriving thickness of recording medium to be transported, and image forming apparatus provided with same

Provided is a transport device including a transport section by which a recording medium is interposed and is transported while rotating, a driving section that drives the transport section, a control section that performs control so that the recording medium enters a predetermined position of the transport section in a rotation direction, a detection section that detects a load of the driving section during a period of time in which the recording medium is transported by the transport section, and a derivation section that derives a thickness of the recording medium based on the load.

A transporting device includes a detecting portion that detects a load applied to a driving portion provided for transporting a medium, an identifying portion that identifies a type of the medium from a result of detection performed by the detecting portion, and a correcting portion that fits, if a predetermined instruction is made, the result of detection to a predetermined reference characteristic of the load applied to the driving portion.

Transporting device, fixing device, and image forming apparatus

Provided is an image reading device including an irradiation section that irradiates a reading position with light, a color chart that includes plural color patches, and that is provided on a curved surface of a rotatable roller, an image capturing section that captures an image of the color chart at the reading position, and that outputs image signals which express the captured image, a correction section that corrects the image signals using a correction coefficient corresponding to the curved surface, and a calibration section that performs calibration using the image signals, which are corrected by the correction section, and representative color values of the plural color patches, the representative color values being stored in advance.

Image reading device and image forming apparatus performing image correction using color patches on a curved surface

Provided is a transport device including plural rollers that are provided on a transporting path on which a sheet is transported in a transport direction and is subjected to a process at a process position, and transport the sheet which comes into contact with surfaces of the rollers in the transport direction by rotation of the rollers, among the plural rollers, first rollers that are provided closest to the process position, among the plural rollers, second rollers that are provided closest to the first rollers on an opposite side with respect to the process position, and a driving unit that drives the first rollers and the second rollers to rotate so that a speed of a surface of the first roller is faster than a speed of a surface of the second roller at least while the sheet passes through the process position.

Transport device and transport system

Provided is an image reading apparatus including a guide plate that is movable between a first position and a second position and guides a medium at one side thereof when disposed at the first position, a retention member that is rotatable about an axis intersecting a direction in which the medium is guided, that has a first side surface and a second side surface which has a curvature greater than a curvature of the first side surface, and that retains plural color samples on the second side surface, a reading unit that reads, at a reading position, an image formed on the medium guided by the guide plate, and a rotating unit that causes the retention member to rotate such that the other side of the guide plate and the first side surface face each other and the plural color samples are moved to the reading position.

Image reading apparatus

Provided is an image reading apparatus, including a reading portion which reads an image and generates gradation values of each pixel, a calculation portion which calculates a coefficient group that allows the gradation values of each pixel generated as the reading portion reads a reference image, to be close to the gradation values of the pixels which correspond to image data forming the reference image, divides plural regions including an overlapped part in which the reference images are overlapped with each other, and calculates the coefficient group in each region, and a correction portion which corrects the gradation values of each pixel generated as the reading portion reads a correction target image, and corrects the gradation values of the correction target which correspond to the gradation values of the pixels of the overlapped part using the coefficient group.

Image reading apparatus and medium

An image forming device includes an image holding member and a charging unit. In a case in which an AC current, while being increased, is supplied to the charging unit in a state in which a DC voltage value and an AC voltage value applied to the charging unit are maintained, or a case in which a DC voltage, while being increased, is supplied to the charging unit in a state in which the AC voltage value applied to the charging unit is maintained, a current detection unit detects DC current values. An inflection point derivation unit derives an inflection point of a correlation line representing an correlation between the detected DC current values and the supply amounts. An execution unit executes pre-specified processing when a characteristic value of the derived inflection point reaches a pre-specified value.

Image forming device, computer readable medium and photoreceptor deterioration condition estimation method

A total layer thickness detection apparatus for a charged body includes: a saturated charge amount detection unit that detects a saturated charge amount of a charged body having plural coating layers with mutually different relative dielectric constants; a storage unit that stores relation information indicating relation of change of the saturated charge amount of the charged body with respect to a change of layer thickness of a surface layer of the charged body; and a calculation part that calculates a total layer thickness of the plural coating layers of the charged body based on the change of the saturated charge amount detected by the saturated charge amount detection unit and the relation information stored in the storage unit.

Total layer thickness detection apparatus, charging device, image forming apparatus, total layer thickness detection method and computer readable medium storing program for total layer thickness detection

An image forming apparatus includes: an image carrier that rotates and carries a toner image by a surface layer disposed on a surface thereof; a charging roll that charges the surface layer while the image carrier completes one or more rotations; a power supply unit that supplies a current to the charging roll; a detector that samples and detects the current that the power supply unit outputs; a leak current detector that detects a leak current included in the current that the detector has detected; a layer thickness calculating unit that calculates a numerical value relating to the thickness of the surface layer on the basis of the current that the detector has detected; and a current leak state determining unit that determines a current leak state on the basis of the current that the detector has detected and the leak current that the leak current detector has detected.

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Kanagawa, Japan

Hideki Moriya