Ricoh Company, Ltd.

Daisuke Sawada

Masato Kobayashi

Nobuyuki Satoh

Daisaku Horikawa

Tatsuhiko Okada

Hiromichi Ninomiya

Norikazu Taki

Hajime Teraji

Kentaroh Nodera

Takeshi Kojima

Michiya Okamoto

Takuma Iwasaki

Shinya Karasawa

Masanori Moro

Yuji Arai

Yutaka Ikebuchi

Arinobu Yoshiura

Daisuke Tomita

Jun Yamane

Masahiko Shakuto

Yuichi Sakurada

Kohichi Utsunomiya

Yuta Azeyanagi

Motoyoshi Yamano

Hideo Nagafuji

Shingo Kuboki

Shohei Saito

Arata Suzuki

Qifeng Cui

Takahiro Kikuchi

Yuuki Nobuoka

Yuichi Harashima

Satoshi Endoh

Yohichi Tsukamoto

A sealing member is attached to a second member attached to and detached from a first member having a first opening through which powder passes and having a second opening that communicates with the first opening when the second member is coupled to the first member, and prevents the powder from leaking from a coupling portion between the first opening and the second opening. The sealing member includes: a first elastic member with a first surface arranged on the second member; and a second elastic member arranged on at least a part of a periphery of the first elastic member and having hardness different from that of the first elastic member.

Sealing member, toner conveying device, and image forming apparatus

A cleaning device comprises: a to-be-cleaned member; a cleaning member that cleans the surface of the to-be-cleaned member; a conveying member that conveys a substance removed from the surface of the to-be-cleaned member to outside of the device; a rotatable collecting member that conveys with its surface the substance toward the conveying member; and a partitioning member that guides the substance from the collecting member to the conveying member. The collecting member comprises a conveying portion that carries and conveys the substance; and a protrusion that protrudes toward an upstream side of the conveying portion in a rotating direction of the collecting member. One end of the partitioning member faces the rotating collecting member, and the other end faces the conveying member. The conveying portion and the protrusion are brought into contact with the partitioning member by the rotation of the collecting member.

Cleaning device and image forming apparatus

A paper conveyance device comprises: a conveyance member having a conveyance surface for conveying a recording medium, the conveyance member extending in a first direction along a front-rear direction of the image forming apparatus that has an opening member for exposing inside of the apparatus, and including a handle disposed on an exposure surface of the opening member, and a swing pivot point that is used to swing the conveyance member around the first direction to expose the conveyance surface when the handle is operated in the open state. The handle is disposed in at least one position in a range between positions near a center of the conveyance member in the first direction. The positions are a certain distance away from the center of the conveyance member along the first direction.

Paper conveyance device, fixing device, and image forming apparatus

The waste toner container includes: a waste toner detection unit configured to detect a state in which a toner surface of waste toner at that position is displaced up to a ceiling portion or near the ceiling portion. The waste toner detection unit includes: a flexibility member installed so as to cover an opening portion formed in the ceiling portion or a side wall and is configured to be deformed by a direct or indirect push by the waste toner; and a movable member formed so as to contact the flexibility member from outside of the container and so as to be displaced by the direct or indirect push by the waste toner interposing the flexibility member such that displacement thereof is detected by a detection unit. The displacement of the movable member is limited by a regulating member.

Waste toner container and image forming apparatus

An image forming apparatus includes: an image bearer on which a latent image is formed and developed into a toner image; a transfer member that is arranged so as to come in contact with or face the image bearer to form a transfer position; a cleaning unit that removes and collects untransferred toner; a guide member that guides conveyance of the recording medium; a neutralizing light source that irradiates a position downstream of the transfer position and upstream of the cleaning unit in a running direction of the image bearer with neutralizing light which is incident on and reflected by the recording medium sent out from the transfer position and/or the guide member; and a shielding member that blocks light such that the image bearer is not irradiated directly with a part or whole of neutralizing light emitted from the neutralizing light source.

Image forming apparatus

An image forming apparatus includes a photoconductor drum, a first printer head that forms a first pattern on the photoconductor drum and has a first end part, a second printer head that forms second and third patterns on the photoconductor drum and has a second end part that overlaps the first end part in a main scanning direction, a detection sensor that detects the densities of first and second test patterns formed at an area of the photoconductor drum at which the first and second end parts overlap, the first test pattern being formed by combining the first and second patterns, the second test pattern being formed by combining the first and third patterns, and a determination part that determines a deviation direction between the first and second printer heads by comparing the densities detected by the detection sensor.

Image forming apparatus and method for detecting position deviation

A recording apparatus includes a carriage having a recording head including nozzles, a moving unit moving the carriage, a platen including plate members connected in a carriage traveling direction to support a recording medium when the nozzles eject ink onto the recording medium, a transferring unit transferring the recording medium in a transferring direction perpendicular to the carriage traveling direction, a recording control unit recording patterns at predetermined positions in the carriage traveling direction while moving the carriage in forward and backward traveling directions to form a carriage traveling direction pattern array, a determination unit determining ink ejecting times at the predetermined positions in the carriage traveling direction, and a time control unit to linearly interpolate between the determined ink ejecting times at the predetermined positions in the carriage traveling direction to control ink ejecting times for intervals between the predetermined positions based on a result of the linear interpolation.

Recording apparatus and control method therefor

A movable member encoder is used to detect the position of a movable member, and a correction value calculator calculates a correction value corresponding to the amount of displacement of the movable member from a reference position and the integration of the amount of displacement. The correction value calculated by the correction value calculator is then used in correcting a voltage instruction value output from a feed motor controller to a feed motor.

Roll paper conveying apparatus, inkjet printer, and roll paper conveying method

A conveying distance control device includes a conveying roller; a first detecting unit detecting rotational positions of the conveying roller; a line sensor sequentially detecting marks arranged on a test chart; a calculation unit, and a control unit. The calculation unit calculates a skew angle between a line passing through positions of a first mark and a second mark and a conveying direction of the conveying roller. The control unit obtains conveying distance errors indicating differences between corrected conveying distances not including errors caused by the skew angle and theoretical conveying distance of the marks in association with the rotational positions of the conveying roller, calculates a correction value for correcting a conveying distance of the conveying roller based on relationships between the conveying distance errors and the rotational positions of the conveying roller, and controls the conveying distance of the conveying roller based on the correction value.

Conveying distance control device, recording apparatus, conveying distance control method, and storage medium

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Kanagawa, Japan

Daisuke Sawada