Ricoh Company, Ltd.

Mamoru Yorimoto

Daisaku Horikawa

Nobuyuki Satoh

Tatsuhiko Okada

Yuichi Sakurada

Suguru Yokozawa

Masato Kobayashi

Yasuyuki Suzuki

Makoto Moriwaki

Kenji Morita

Shinichiro Naruse

Hiroshi Matsumoto

Tetsu Morino

Kenichi Kawabata

Masaya Kawarada

Ichiro Komuro

Mitsuru Yamada

Hideaki Suzuki

Masayuki Fujii

Ryusuke Mase

Soichi Saiga

Noboru Sawayama

Tetsuro Hirota

Takayuki Niihara

Yuichiro Maeyama

Satoshi Iwanami

Takeshi Watanabe

Takumi Hagiwara

Toshiaki Takahashi

Tomokazu Kanzawa

Kazuyuki Uchida

Masahiro Hiranuma

Kiyoshi Hata

Kyosuke Nakada

Kazushi Takei

Tomohiro Sasa

Ryo Honda

Satoshi Hirata

Kahei Nakamura

Isao Matsushima

Masahiro Shigemoto

Ken Onodera

Atsushi Yamazaki

Masatoshi Sakakitani

Masashi Kimijima

A heating roller unit includes a heating roller, a heat source disposed inside the heating roller, and a tubular member at an end of the heating roller. Inside the tubular member, a terminal of the heat source is disposed. The tubular member has an opening via which inside of the tubular member communicates with an outside in a direction intersecting with an axial direction of the heating roller.

Heating roller unit, drying device, and printer

An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.

Image capturing unit, color measuring device, image forming apparatus, color measuring system and color measurement method for capturing a reference chart and a subject

A feeding device includes a plurality of suction units, disposed above a conveyed medium stacked on a stacker, to attract the conveyed medium. At least one of the plurality of suction units includes a rotary fan including a board and a plurality of walls extending from the board; and a driver to rotate the rotary fan. The at least one of the plurality of suction units generates a vortex air with a side of the board with the plurality of walls directed to the conveyed medium. The at least one of the plurality of suction units being a suction unit generates a vortex air.

Feeding device, image forming system, and conveyed medium inspection system

Image capturing device and color measurement method for capturing a reference chart and a subject

A feeding device to feed a conveyed medium stacked on a stacker, includes a first suction unit, a second suction unit, and third suction units. The first suction unit includes a suction chamber; a suction fan to exhaust air from the suction chamber; and a first driver to rotate the suction fan. The suction units are disposed above the conveyed medium stacked on the stacker. The second suction unit includes a rotary fan including a board and a plurality of walls extending from the board; and a second driver to rotate the rotary fan. The second suction unit generates a vortex flow directed to the conveyed medium. The plurality of third suction units is disposed in a direction perpendicular to a conveyance direction of the conveyed medium and attracts ends of the conveyed medium in the direction perpendicular to the conveyance direction.

An image forming apparatus includes a recording head in which a plurality of nozzles for discharging liquid droplets; and a pattern forming unit configured to form a test pattern used for positional deviation adjustment including a first pattern serving as a reference pattern and a second pattern serving as an adjustment pattern. The first pattern and the second pattern each are a linear pattern that is parallel to a nozzle arrangement direction and has a disconnected portion. The disconnected portion of the first pattern and the disconnected portion of the second pattern are shifted from each other in the nozzle arrangement direction.

Image forming apparatus with improved visibility for a print test pattern

Image capturing apparatus, color measuring device, image forming apparatus, and color measuring system for capturing a reference chart and a subject

A medium identification device identifies a type of a recording medium used for image formation. The medium identification device includes: a two-dimensional image sensor that captures an image of the recording medium; and an identifying unit that obtains a glossiness evaluation value indicating glossiness of the recording medium, a surface roughness evaluation value indicating surface roughness of the recording medium, and a coloring evaluation value indicating coloring of the recording medium, using image data of a specular reflection region reflecting specular reflection light from the recording medium and image data of a diffused reflection region reflecting diffused reflection light from the recording medium, the regions being in the image of the recording medium, and identifies the type of the recording medium by combining determination using the glossiness evaluation value, determination using the surface roughness evaluation value, and determination using the coloring evaluation value.

Medium identification device, image forming apparatus, method of identifying medium, and computer program product

An apparatus includes: a light source; a two-dimensional image sensor that receives reflected light from a subject including specular light of the source and outputs an image of the subject; and an optical member arranged in an optical path of light emitted from the source to the subject. When a specular position of the source in the subject arranged apart from the two-dimensional image sensor by a certain distance is defined as a first specular position, whereas a specular position of the source in the optical member is defined as a second specular position, a relative positional relation of the optical member and the source with respect to the two-dimensional image sensor is determined so that a difference between an incident angle from the source toward the first specular position and an incident angle from the source toward the second specular position is a reference value or more.

Image capturing apparatus, medium type determining apparatus, and image forming apparatus

An imaging device including a light source; a two-dimensional image sensor that receives reflected light from a subject containing specular light of the light source and outputs an image of the subject; a light transmission member disposed in an optical path of light emitted from the light source to the subject; and a light shielding unit that, when a position on the subject at which light from the light source is regularly reflected and enters the two-dimensional image sensor is defined as a first specular position, whereas a position on the light transmission member at which light from the light source is regularly reflected and enters the two-dimensional image sensor is defined as a second specular position, shields the light directed from the light source toward the second specular position without shielding the light directed from the light source toward the first specular position.

Imaging device, medium type determining device, and image forming apparatus

An image capturing device includes: a two-dimensional image sensor that captures an image of a predetermined image capture area including a subject; a light source that illuminates the image capture area; and a light blocking member that blocks light traveling from the light source toward a specular reflection position, the specular reflection position being a position that is in the image capture area and where, if light travels from the light source, the light would be specularly reflected to the two-dimensional sensor. The light blocking member is arranged outside the image capture area.

Image capturing device, color measurement apparatus, and image forming apparatus

An imaging device comprises: a two-dimensional image sensor that includes a plurality of light receiving units capable of reading an output value individually according to a volume of received light thereof; a receiving unit that receives a control signal that specifies an operation mode of the two-dimensional image sensor that is predetermined according to a purpose of using the output value; and a sensor controller that sets, on the basis of the control signal received by the receiving unit, an imaging area representing an area of a light receiving unit that reads the output value from among the light receiving units of the two-dimensional image sensor and controls reading of the output value.

Imaging device, image forming apparatus, and method of controlling driving of two-dimensional image sensor

An image forming apparatus includes a recording-head carrier including a recording head for ejecting a liquid droplet onto a recording medium, a relative moving unit configured to relatively move the recording-head carrier and the recording medium; an image recording unit configured to drive the recording head by a driving signal having a driving waveform to eject liquid droplets toward the recording medium while relatively moving the recording-head carrier and the recording medium; a driving-waveform determining unit configured to determine the driving waveform of the driving signal based on a detected temperature near the recording head; a drive-timing determining unit configured to determine drive timing at which the recording head is driven by the driving signal, based on the detected temperature; and a drive control unit configured to set the driving waveform and the drive timing to the image recording unit to drive the recording head.

Image forming apparatus, image forming method, and computer-readable storage medium

Image capturing unit, color measuring device, image forming apparatus, color measuring system and color measurement method capturing a subject outside of the image capturing unit

An imaging device includes: a sensor unit that is arranged at a predetermined position inside a casing, and that images a subject outside the casing through an opening portion, with a part of an imaging region, while imaging a reference chart with another part of the imaging region; and a light absorption member that is arranged in an optical path of light from a illumination light source toward a specular-reflection position from which specular-reflection light of the illumination light source is entered to the sensor unit, in the imaging range. The light absorption member has at least a first surface on which light from the illumination light source toward the specular-reflection position is irradiated, and a second surface that faces to the first surface, and reflected light that has been reflected on the first surface and then on the second surface is further directed toward the first surface.

Imaging device, colorimetry device, and image forming apparatus

Growing community of inventors

Kanagawa, Japan

Mamoru Yorimoto