Roland Dg Corporation

Sii Printek Inc.

Seiko Instruments Inc

Noritake Co., Ltd.

Fumiyoshi Iwase

Masatoshi Toda

Tetsuya Murase

Kazuya Morizono

Yuzuru Kubota

Yuichi Sugiyama

Yuji Sakata

Tetsuhiro Kunifuji

Daishi Yoshikawa

Akihiro Yamamoto

A three-dimensional printing device includes a printing tank to accommodate a powder material and including an opening in at least a portion thereof, and an ejector facing the opening of the printing tank to eject a curing liquid to cure the powder material toward the opening. The ejector includes nozzle strings each including nozzles side by side in a first direction. The nozzles each eject the curing liquid and are located in each of the nozzle strings at a density of about 1200 dpi or lower in the first direction. The nozzle strings are spaced away from each other by a distance of about 5 mm or longer in a second direction perpendicular to the first direction.

Three-dimensional printing device

The present invention provides a powder for layer manufacturing including non-hydratable matrix particles, and water-soluble adhesive particles. The powder for layer manufacturing includes, as the water-soluble adhesive particles, polyvinyl alcohol resin particles with a saponification degree of 86.5 mol % to 89.0 mol %, an average degree of polymerization of 400 to 600, a viscosity of a 4 mass % aqueous solution at 20&#xb0; C. of 4.6 mPa to 5.4 mPa, and an average particle diameter of 20 &#x3bc;m to 60 &#x3bc;m.

Powder comprising PVA resin particles for layer manufacturing and layered shaped article

A three-dimensional printing data generation device includes a storage storing data of a three-dimensional target object model, a support model generation processor generating, based on the data stored in the storage, data of a three-dimensional support model including a substrate portion located below the target object model and a handle portion extending upward from the substrate portion, the substrate portion including a through-hole larger than a particle diameter of a powder material, and an output processor outputting the data of the target object model and the data of the support model as three-dimensional printing data.

Three-dimensional printing data generation device, and three-dimensional printing system including the same

An ink supply system, inkjet printer, and ink loading method are provided. The ink supply system includes an ink head comprising a nozzle; first and second ink containers; a first ink supply passage; a second ink supply passage; an ink amount detecting device configured to detect an amount of ink in the first ink container; and a notifying device to provide a notification when the detected amount of ink is less than or equal to a threshold amount.

Ink supply system, ink-jet printer, ink loading method, and method of using ink supply system

A liquid jet head has a jetting portion with nozzles for jetting a liquid that is contained in a liquid container. A liquid storing portion is disposed in a conduit that interconnects the liquid storing portion and the jetting portion and that supplies the liquid in a liquid container to the jetting portion through operation of a pump. The liquid storing portion is configured to dampen fluctuations in the pressure in the conduit. A pressure sensor is disposed in the conduit for measuring a pressure in the conduit. The operation of the pump for supplying the liquid in the liquid container to the jetting portion is controlled based on a value of the pressure measured by the pressure measuring means so that the pressure of the liquid supplied from the conduit to the jetting portion is within a predetermined pressure range.

Liquid ejection head, carriage unit, pressure control method, and liquid ejection recording apparatus

An image forming apparatus is presented. The image forming apparatus includes an ink tank configured to store ink, a recording head configured to discharge ink stored in the ink tank onto a recording medium, an adjustment device configured to adjust the flow of ink from the ink tank to the recording head, a damper configured to temporarily store ink that is output from the ink tank to the recording head, an ink condition sensor configured to detect a condition of the ink stored in the damper, and a control device configured to adjust the adjustment device according to the condition detected by the ink condition sensor.

Image forming apparatus

A liquid jet recording apparatus adjusts the pressure of liquid jetted from a jetting portion toward a recording medium. The liquid jet recording apparatus has a pressure sensor provided in a tube between a liquid storing portion and a roller tube pump. The pressure of the liquid which flows through the tube is measured, and a pressure value is sent to a control portion. The pressure value is compared with lower limit values and upper limit values stored in a definition file stored in the control portion, and a corresponding drive signal is sent to a drive portion to drive the roller tube pump in a forward or a reverse direction to adjust the pressure of the liquid in the jetting portion.

Liquid jet recording apparatus, liquid jet head unit, and liquid jet recording method

A liquid jet recording apparatus includes a liquid container that contains liquid, a jetting portion disposed at a lower level than the surface of the liquid contained in the liquid container for jetting the liquid, and a conduit for communicating the jetting portion with the liquid container. An on-off valve opens or closes the conduit to permit or block the flow of the liquid in the conduit. A liquid storing portion damps pressure fluctuations of the liquid which flows in the conduit and is disposed in the conduit between the on-off valve and the jetting portion. A pressure sensor measures the pressure of the liquid in the conduit, and a control portion controls the on-off valve to be opened or closed based on a pressure value measured by the pressure sensor.

Liquid jet recording apparatus and liquid jet recording method

A tube pump includes: an elastic tube (); a circular arc-shaped guiding member () for guiding the tube (); and at least one pressing member () for pressing the tube () against the guide member (). The tube pump is characterized by being provided with a recessed portion () in a portion of the guiding member (), in which the tube () is not pressurized by the pressing member () and can be recessed. Thus, there can be provided a tube pump in which a negative pressure inside an ink supply passage () can be eliminated and air can be readily prevented from entering the ink supply passage () when the main tank () is replaced, and an ink jet recording device using the tube pump.

Tube pump, ink jet recording device, and ink feeding method

An ink jet head of an ink jet printer comprises an ink jet nozzle ejecting ultraviolet curing ink, a pair of ultraviolet LEDs provided on both sides of the ink jet nozzle in the moving direction for emitting ultraviolet light in order to cure the ultraviolet curing ink.

Ink jet printer

An ink jet head () of an ink jet printer comprises an ink jet nozzle () outputting ultraviolet curing ink, a pair of ultraviolet LEDsandprovided on both sides of the ink jet nozzle in the moving direction for emitting ultraviolet in order to cure the ultraviolet curing ink.

An inkjet printer with a cutting head comprises a linear motion rail, and a linear motion block slidably provided on the linear motion rail. An inkjet head carriage holding an inkjet head and a cutting head carriage holding a cutting head are fixed to the linear motion block through respective mounting parts and moved along the linear motion rail.

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Hamamatsu, Japan

Fumiyoshi Iwase