Ricoh Company, Ltd.

Tohoku Ricoh Co., Ltd.

Kengo Tsubaki

Satoshi Katoh

Tatsuro Watanabe

Hiroyuki Hiratsuka

Yoshiya Itoh

Hiroyoshi Komaba

Akira Saito

Masanori Takahashi

Tomiya Mori

Haruki Saitoh

Kazuyoshi Kobayashi

Yoshiyuki Araseki

A recording-head position adjustment mechanism adjusts a position of a recording head that discharges liquid droplets. The recording-head position adjustment mechanism includes a supporting member and a discharge angle adjuster. The supporting member includes an upper support to support an upper portion of the recording head and a lower support to support a lower portion of the recording head. The discharge angle adjuster swings the lower portion around the upper portion as a fulcrum to adjust a discharge direction of the liquid droplets from the recording head.

Recording-head position adjustment mechanism, recording-head module, and image forming apparatus

A liquid discharge head angle adjuster for individually adjusting inclination angles of a plurality of liquid discharge heads includes a plurality of array members and a plurality of array supports. The plurality of array members holds the liquid discharge heads. The plurality of array supports the array members. At least one of the array supports includes a first support, a second support, and a pressing member. The first support is disposed on one side in a direction in which one of the liquid discharge heads is rotated when an inclination angle of the one of the liquid discharge heads is adjusted. The first support supports a rotation fulcrum of one of the array members. The second support is disposed on a side opposite the first support, and supports another of the array member. The pressing member presses the rotation fulcrum against the first support.

Liquid discharge head angle adjuster, liquid discharge module, and liquid discharge apparatus

A recording-head position adjustment mechanism adjusts a position of a recording head. The recording-head position adjustment mechanism includes a first support, a second support, and an adjuster. The first support supports a first end of the recording head in a longitudinal direction of the recording head. The second support supports a second end of the recording head in the longitudinal direction. The adjuster moves the second support with respect to the first support in a transverse direction intersecting the longitudinal direction to adjust an inclination of the recording head.

A liquid discharge apparatus includes a plurality of head arrays each including a plurality of liquid discharge heads to discharge a liquid from nozzles onto a medium, a drum to rotate and convey the medium to a position facing the plurality of head arrays, and a wiper to wipe the plurality of liquid discharge heads. The plurality of head arrays is inclined at different angles, and the wiper includes a plurality of wiping surfaces to wipe nozzle surfaces of the plurality of liquid discharge heads of the plurality of head arrays, respectively, the nozzles are formed on the nozzle surfaces, and the plurality of wiping surfaces is inclined at the different angles in accordance with the plurality of head arrays, respectively.

Liquid discharge apparatus and image forming apparatus

A processing target reforming apparatus includes: a conveying unit that conveys a processing target along a conveyance path; a discharge unit including a plurality of discharge electrodes aligned along the conveyance path, a counter electrode with the conveyance path interposed therebetween, and a power source that applies a voltage waveform to the discharge electrodes; and a control unit that controls the discharge unit such that a phase of the voltage waveform applied to a first discharge electrode of the discharge electrodes at a timing when a certain point of the processing target passes between the first discharge electrode and the counter electrode is shifted with respect to a phase of the voltage waveform applied by the power source to a second discharge electrode of the discharge electrodes at a timing when the certain point of the processing target passes between the second discharge electrode and the counter electrode.

Processing target reforming apparatus, printing apparatus, printing system, and method

A treated object modifying apparatus includes a plasma-treating unit that includes a first electrode unit, a second electrode unit, and a dielectric that is interposed between the first electrode unit and the second electrode unit, and that plasma-treats a treated object positioned between the first electrode unit and the dielectric; and a controlling unit that controls the plasma-treating unit so that the amount of plasma energy delivered to any one of sides of the treated object in a duplex treatment that are performed with the one side of the treated object facing the first electrode unit and with the other side of the treated object facing the first electrode unit is different from the amount of plasma energy delivered to any one of the sides of the treated object in a simplex treatment that is performed with the one side of the treated object facing the first electrode unit.

Treated object modifying apparatus, printing apparatus, printing system, and method for manufacturing printout

A modification device includes: a plasma processing unit that performs plasma processing on a processed object such that a surface of the processed object has a predetermined water contact angle; and a cooling unit that cools the surface of the processed object at least from when the plasma processing is performed to when ink is discharged such that a surface temperature of the processed object during discharge of the ink to the processed object is a temperature at which a target water contact angle range is achieved.

Modification device, modification method, computer program product, image forming apparatus, and image forming system

An inkjet recording device including a line engine including a plurality of recording heads that are aligned in a main scanning direction, in which an arbitrary one of the plurality of recording heads is replaceable. Each of the plurality of recording heads includes a head tank attached on the corresponding one of the plurality of recording heads. The head tank includes a supply port and a discharge port for ink. The head tanks that are adjacent to each other are connected by the respective discharge ports and the supply ports.

Inkjet recording device

An inkjet image forming apparatus which is provided with a line engine in which one or more recording heads are aligned in a main scanning direction and which has replacably configured an arbitrary one of the recording heads is disclosed. In the inkjet image forming apparatus, each of the recording heads includes a head tank mounted on the recording head, the head tank including a supply port and a discharge port for ink, the head tanks which are adjacent are mutually connected by a path in which the discharge port and supply port of the respective head tanks are coupled via a coupling unit, a path from the discharge port and a path to the supply port differ in an inner path diameter over the coupling unit, and the inner path diameter on the discharge port side is larger than the inner path diameter on the supply port side.

Inkjet image forming apparatus

A liquid discharge head unit includes a liquid container tank storing a liquid and a head discharging liquid droplets from its nozzles. The head includes a common channel supplying the liquid to liquid-chambers communicating with the nozzles, and the common channel includes a supply port introducing the liquid and a discharge port discharging the liquid. The liquid container tank includes a container including upstream and downstream chambers separated via a filtering member, a supply path supplying the liquid from the downstream chamber to the supply port of the head, a discharge path discharging the liquid obtained from the discharge port of the head, a communication path via which the downstream chamber communicates with the discharge path, and a communication path via which the upstream chamber communicates with the discharge path, where a fluid resistance of the second communication path is higher than that of the first communication path.

Liquid discharge head unit and image forming apparatus

In a liquid jetting head unit, a tank case in a head tank includes a first connection path connecting a downstream chamber of the tank case and a discharge path, and a second connection path connecting an upstream chamber of the tank case and the discharge path. The discharge path includes a filter member provided between a first part of the discharge path connected to the first connection path and a second part of the discharge path connected to the second connection path.

Liquid jetting head unit and image forming apparatus

An image forming apparatus includes plural heads each having a nozzle configured to discharge a droplet of a recording fluid; a distributing member to which the plural heads are attached, the distributing member having an inlet portion, a supply channel portion, and a common fluid chamber communicated with the inlet portion and configured to supply the recording fluid to the plural heads; and a fluid containing unit configured to supply the recording fluid to the distributing member via the inlet portion and the supply channel portion. The distributing member includes a flow-directing wall disposed between the supply channel portion and the common fluid chamber.

Image forming apparatus with a structure for preventing bubbles from entering recording head or remaining in a fluid supply channel

A stencil printing apparatus with a plate-making device has first control means for executing a special plate-making mode for performing a plate-making operation so that perforated holes to be formed in a film of a master by heating and driving with regard to odd bits corresponding to odd-numbered heat generators and even bits corresponding to even-numbered heat generators are formed in different lines running in the main scanning direction, and so that the perforated holes to be formed on the film by heating and driving with regard to the odd bits and the even bits adjacent to each other are not arranged adjacent to each other in the same line in the main scanning direction.

Stencil printing apparatus having controlled thermal head for perforating stencil

A stencil printer of the present invention includes a print drum for wrapping a master therearound, a master making and conveying section for perforating a stencil paid out from a stencil roll while conveying it to thereby produce the master, a master stocking section for stocking the master being conveyed by the master making and conveying section, and a roller pair for conveying the master out of the master stocking section. A movable master guide selectively guides the stencil paid out from the stencil roll to the master stocking section or the roller pair. A stretching member adjoins the print drum and is movable between a contact position where it contacts the stencil present on the print drum to thereby exert a stretching force on the master and a released position where the former is released from the latter. The stretching member and movable master guide are interlocked to each other.

Growing community of inventors

Kanagawa, Japan

Kengo Tsubaki