Ricoh Company, Ltd.

Yukifumi Kobayashi

Takayuki Nishimura

Tohru Matsumoto

Tetsuya Ofuchi

Hideyo Makino

Noriaki Takenaga

Yasuyuki Sekino

Yuji Karikusa

Kohtaroh Oda

Tatsuya Ishii

Tomoaki Suga

Daiki Sekita

Kohsuke Yoshida

Hiroki Terauchi

Yuusuke Kumagawa

Kohdai Kurita

A sheet remover includes a pair of insertion-part formers and a pair of through-part formers. The pair of insertion-part formers forms an insertion part between the pair of insertion-part formers into which a sheet is inserted. The pair of through-part formers forms a through part between the pair of through-part formers through which the sheet is inserted. The through part is located downstream from the insertion part in a sheet insertion direction in which the sheet is inserted.

Sheet remover, conveying device, and image forming apparatus

An image forming apparatus includes circuitry that detects a position at which a first image is formed on a first face of a recording medium between an instant when the first image is formed on the first face of the recording medium and an instant when a second image is formed on a second face of the recording medium, calculates a first adjustment value used to adjust a position at which the second image is formed on the second face of the recording medium, based on the detected position at which the first image is formed on the first face of the recording medium, adjusts the position at which the second image is formed on the second face of the recording medium, based on the first adjustment value, and detects the adjusted position at which the second image is formed on the second face of the recording medium.

Image forming apparatus and methods of operations thereof including position correction operations

An image reading device includes a first scanner, a second scanner, and circuitry. The first scanner is configured to read a first side of a recording medium. The second scanner is configured to read a second side of the recording medium. The circuitry is configured to generate a first correction value to correct misalignment between the first side and the second side. The circuitry is configured to input a second correction value. The circuitry is configured to correct an image based on the first correction value and the second correction value.

Image reading device and image forming apparatus incorporating same

An image forming apparatus includes a conveying device, an image forming device, a reading device, and control circuitry. The conveying device sequentially conveys a plurality of successive recording media that includes a preceding recording medium and a following recording medium. The image forming device forms an image on each of a front surface and a back surface of the preceding recording medium conveyed. The reading device reads an outer shape of the preceding recording medium. The control circuitry calculates an amount of deformation of the preceding recording medium based on the outer shape of the preceding recording medium read. The control circuitry corrects at least one of a front image and a back image based on the amount of deformation calculated, to cause the image forming device to form the front image and the back image on a front surface and a back surface, respectively, of the following recording medium.

Image forming apparatus having correction of following image based on deformation of preceding recording medium

An image forming apparatus, in which an image forming method is performed, includes an image forming device to form an image on a recording medium, a reading device to scan the recording medium having a mark and generate a scanned image, and circuitry to calculate a correction value to adjust a position of the image to be formed on the recording medium, based on the scanned image. The circuitry calculates the correction value to adjust a position of an image to be formed on a second face of the recording medium based on a first scanned image generated from a first face of the recording medium, within a period from when the first scanned image is generated from the first face to when the image starts to be formed on the second face.

Image forming apparatus and image forming method for adjusting position of image formed on recording medium

An image forming apparatus, in which an image forming method is performed, includes an image forming device to form an image on a recording medium, a reading device to scan the recording medium having a position detection mark and generate a scanned image, and circuitry to calculate a plurality of correction values to adjust a position of the image to be formed on the recording medium, based on the scanned image. The circuitry is configured to calculate a first correction value based on a first scanned image generated from a first face of the recording medium, calculate a second correction value based on a second scanned image generated from a second face of the recording medium, and calculate a third correction value to adjust a position of an image to be formed on the second face, based on the first scanned image using the first correction value.

Image forming apparatus including circuitry for correcting a relative positional deviation of an image to be printed on a recording medium and image forming method for the same

An image forming apparatus includes an information obtainer, a memory, a candidate determining unit, and an image forming device. The information obtainer obtains feature information from the target recording medium. The memory stores at least one set of recording medium information regarding the target recording medium associated with the feature information and at least one set of image forming condition information corresponding to the recording medium information. The recording medium information is identification information. The candidate determining unit determines a candidate recording medium information from the recording medium information stored in the memory based on the feature information of the target recording medium obtained by the information obtainer. The image forming device forms an image on the target recording medium based on the image forming condition information in the memory according to the candidate recording medium information determined by the candidate determining unit.

Image forming apparatus incorporating information detector

A sheet discriminator, which is incorporated in an image forming apparatus and an image forming system, includes a sheet loader on which a recording medium is loaded, an information detector including a light emitter to emit light to a surface of the recording medium loaded on the sheet loader and a light receiver to receive the light emitted by the light emitter and detecting information of the recording medium, a sheet distinguisher to distinguish a type of the recording medium based on the information detected by the information detector, and a light emission controller to control activation and stop of the light emitter and activate the light emitter before the information detector starts detection of the information of the recording medium.

Sheet discriminator, image forming apparatus incorporating same, and image forming system incorporating same to distinguish sheet types

A sheet discriminator, which can be included in an image forming apparatus, includes an optical information detector, a sheet distinguisher, and a sheet thickness detector. The optical information detector includes a light emitter to emit light to a recording medium and a light receiver to receive the light and detects information of the recording medium. The sheet distinguisher distinguishes a type of the recording medium based on the information detected by the optical information detector. The sheet thickness detector includes a displacement gauge to sandwich the recording medium with an opposing member disposed facing the displacement gauge and to move from an initial position thereof and a displacement detector to detect an amount of displacement of the displacement gauge. The sheet thickness detector detects a thickness of the recording medium based on detection results obtained by the displacement detector.

Sheet discriminator and image forming apparatus incorporating the sheet discriminator

An image forming apparatus includes an image forming device configured to form a first image on a first side of a recording medium and a second image on a second side of the recording medium, a position detector configured to detect respective positions of the first and second images, and a controller configured to perform, based on detection results obtained by the position detector, at least one of an image position correction by matching the first and second images and a magnification error correction by calculating and correcting a magnification error of one of the first and second images relative to the other. A program product used in the image forming apparatus includes a method of forming the first image and the second image, detecting the respective positions of the first and second images, and matching a position or a size of the first and second images.

Image forming apparatus and program product used in the image forming apparatus

A sheet discriminator, which can be included in an image forming apparatus, includes a sheet loader on which a recording medium is loaded, an information detector including a light emitter to emit light to a surface of the recording medium loaded on the sheet loader and a light receiver to receive the light emitted by the light emitter and detecting information of the recording medium, a sheet distinguisher to distinguish a type of the recording medium based on the information detected by the information detector, and a detector body encasing at least the information detector therein and having an opening formed on an opposing face facing the sheet loader. The opposing face has an opening formed thereon. The opening has at least one arc-shaped side.

A sheet discriminator includes a sheet loader on which a recording medium is loaded, an information detector to detect information of the recording medium loaded on the sheet loader, and a sheet distinguisher to distinguish a type of the recording medium based on the information detected by the information detector. The information detector detects the information of the recording medium with the recording medium being inserted between the sheet loader and the information detector. An image forming apparatus incorporates the sheet discriminator and an image forming part to form an image on the recording medium.

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Kanagawa, Japan

Yukifumi Kobayashi