Ricoh Company, Ltd.

Mikio Ohashi

Yoichi Ito

Soyoung Park

Yoshinori Uchino

Fumitaka Kikkawa

Takashi Kimura

Toshihito Kamei

Masanori Hirano

Masakazu Yoshida

Tatsuhiko Oikawa

Naoki Saitoh

Mitsuru Shingyouchi

Sumiaki Aoki

Mitsuru Shingyohuchi

Tadayasu Enomoto

Noriyuki Sai

Taeko Takahashi

An image forming apparatus includes an apparatus body, a recording head, a maintenance unit, a cover, and a controller. The recording head has a nozzle face and nozzles in the nozzle face to eject droplets of liquid. The maintenance unit has a cap to protect the nozzle face of the recording head. The cover opens an interior of the apparatus body to an outside of the apparatus body. The controller performs a normal control to cap the nozzle face of the recording head with the cap on opening of the cover and a special control to expose the nozzle face of the recording head to an area opened by the cover on receipt of an external instruction.

Image forming apparatus configured to include nozzle face capping control

An image forming apparatus includes a recording head, a receiving face member, and a cleaner. The recording head discharges droplets. The receiving face member includes a receiving face to receive dummy discharge droplets discharged from the recording head and not contributing to image formation. With rotation of the receiving face member, the receiving face movable between a facing position at which the receiving face faces the recording head and a retracted position at which the receiving face does not face the recording head. The cleaner cleans the receiving face of the receiving face member.

Image forming apparatus

An image forming apparatus includes an image forming unit to form an image on a medium; a reciprocally moving carriage on which to mount the image forming unit; a carriage position detector to detect a position of the carriage; a conveyance unit to convey the medium; a conveyance path of the medium; a regulator to regulate a distance between the medium and the image forming unit and movable in a moving direction of the carriage; a regulator detector, mounted on the carriage, to detect the regulator; a drive unit to move the regulator; and a controller that controls a position of the regulator based on a reading from the carriage position when the regulator detector detects the regulator.

An image forming apparatus including an image forming unit, a conveyor, and a string-shaped regulation member. The image forming unit forms an image on a recording medium. The conveyor is disposed opposing the image forming unit to convey the recording medium along a conveyance passage. The string-shaped regulation member is disposed between the image forming unit and the conveyance passage to regulate a distance between the recording medium and the image forming unit within a certain range.

An image forming apparatus includes an image forming unit forming an image on a recording medium; and a feeding unit feeding the recording medium in first and second directions opposite to each other relative to the image forming unit. Further when the recording medium is supplied from a first or second side of the feeding unit, while the feeding unit feeds the recording medium in the first or second feeding direction, the image forming unit forms an image on the recording medium, and the feeding unit further feeds the recording medium to the second or first side, respectively, of the feeding unit.

Image forming apparatus configured for bi-directional feeding of medium

An image forming apparatus includes an apparatus body; an openable and closable cover provided at the apparatus body; a conveyance unit to convey a recording medium upward and downward; a recording head to eject liquid droplets to the recording medium conveyed by the conveyance unit; and an opening authorization mechanism to authorize moving of the conveyance unit from a first open position to a second open position, the conveyance unit having a greater opening amount at the second open position than at the first open position, wherein the conveyance unit is disposed between the cover and the recording head, and configured to be openable to the first open position when the cover is in the open position, and openable to the second open position when the opening authorization mechanism authorizes the moving of the conveyance unit from the first open position to the second open position.

An image formation apparatus is disclosed, wherein a time interval between a first ink drop and a second ink drop is set at 1.5&#xd7;Tc, a time interval between the second ink drop and a third ink drop is set at 1.5&#xd7;Tc, and a time interval between the third ink drop and a fourth ink drop is set at 2&#xd7;Tc, where Tc represents the specific vibration cycle of a pressurized ink chamber.

Image formation apparatus

In an ink-jet printing device which has an ink-jet recording head in which a plurality of nozzles are formed, and forms an image based on multi-level image data, a gamma correction parameter is selected according to discharging characteristics of the recording head to an input gradation level or according to lightness characteristics of a printed image to an input gradation level, and an image is formed based on the selected gamma correction parameter. For example, even when there is a variation in lightness characteristics of recording heads as in FIG., an optimal gamma correction parameter is selected for each recording head and the image is formed. Thus, a constant image quality is obtained even if the recording heads are exchanged.

Image processing method, recorder, ink jet recorder, printer driver, image processor, imaging system and imaging method

A head driving unit the generates a driving waveform, each driving waveform including a plurality of driving pulses, and selects one or more driving pulses to be applied to a liquid drop discharging head in response to data corresponding to an image. By selecting a plurality of selection signals that defines the driving pulses to be applied to the liquid discharging head, the head driving unit can change a recording density or record multiple value images.

Head driving unit and an image forming apparatus using the same

In a surface potential sensing device, a sense electrode electrically independent of an object is located at a preselected distance from the object for sensing the surface potential of the object Electrostatic capacitance between the object and the sense electrode is varied in order to detect two or more variables in a potential signal output from the sense electrode. The potential detection signal is corrected on the basis of the two or more variables.

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Kanagawa, Japan

Mikio Ohashi