Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Other

Masashi Hiroki

Satoshi Kaiho

Kazuhiko Ohtsu

Ryozo Akiyama

Toru Ushirogouchi

Masashi Takahashi

Takeshi Watanabe

Shinji Aoki

Hiroshi Kiyomoto

Takaya Kitawaki

Yoshito Endo

Chiaki Tanuma

Mitsuru Ishibashi

Hiroshi Murata

Takao Izumi

Takashi Kado

Yasushi Kuribayashi

Tadayoshi Ohno

Takeo Miki

Yoshiaki Kaneko

Atsushi Kubota

Kunihiro Shibuya

Mitsuaki Kohyama

Hiroyuki Ishikawa

Toshihiro Kasai

Hideki Nukada

Kazuhiro Hara

Takashi Hatakeyama

Kenichi Takahara

Tuyoshi Todome

Junichi Koseki

Yuka Nakamura

Yukiko Kawakami

Yoshiya Hashimoto

Toru Ushirogochi

According to one embodiment, a fixing device includes a fixing section including a fixing belt laid over a plurality of supporting rollers and an endless rotating section that forms a nip between the rotating section and the fixing belt, the fixing section being configured to nip and carry a recording medium in the nip, and a control section configured to control the fixing section at first fixing speed while a leading end of the recording medium is passing at least a part of the nip and control the fixing section at second fixing speed higher than the first fixing speed after controlling the fixing section at the first fixing speed.

Fixing device and image forming apparatus

According to one embodiment, the inkjet head of an application example includes a pressure chamber for charging the ink, an actuator for changing the volume of the pressure chamber, a nozzle for discharging the ink inside the pressure chamber when the volume of the pressure chamber is changed, and a controller that, in the formation of one pixel by discharging ink drops from the nozzle, when the elapsed interval from discharging ink drops last time by the nozzle is less than the specified interval, outputs the discharging waveform corresponding to the ink drop number determined for the formation of the pixel, and when the elapsed interval is more than the specified interval, increases the number of ink drop discharge cycles above the number determined for the formation of the pixel.

Inkjet head and an inkjet recording device

An inkjet recording device includes an inkjet head that is equipped with a nozzle to discharge ink, an ink flow path connected to this inkjet head, an adjustment unit that adjusts the pressure in the ink flow path, and a maintenance unit that wipes the nozzle of the inkjet head, and a control unit that executes a maintenance mode of the inkjet head by controlling the adjustment unit and the maintenance unit. The control unit controls the maintenance unit to wipe the nozzle after the adjustment unit adjusts the pressure inside the ink flow path to a first positive pressure, and then again, after the adjustment unit adjusts the pressure in the ink flow path to a first negative pressure. The control unit further controls the adjustment unit to adjust the pressure in the flow path to a second negative pressure that is smaller than the first negative pressure.

Inkjet device and controlling method for inkjet device

According to one embodiment, an inkjet recording apparatus includes a plurality of inkjet heads, a common supply pipe, a common collection pipe and an ink tank device. The common supply pipe includes an upper inner wall from one end side in a longitudinal direction to the other end side, which is inclined with respect to a horizontal direction from the one end side to the other end side if an ink flow direction and opposite direction of a gravitational force are defines as positive axes. The common collection pipe is supplied with the ink from the common supply pipe at one end side in the longitudinal direction. The ink tank device supplies the ink to the one end side of the common supply pipe, and collects the ink from the common collection pipe.

Ink jet recording apparatus

According to one embodiment, an ink jet head includes pressure chambers filled with liquid, nozzles discharging the liquid that is in the pressure chambers, actuators changing the capacity of the pressure chambers, and a processor. The processor repeatedly outputs a waveform voltage including an expansion pulse, a ground potential, a contraction pulse, and a ground potential in this order, as a driving voltage with respect to the actuators.

Ink jet head and method of driving the same

There is provided a photoreceptor cleanerless image forming apparatus capable of decreasing color mixture or an exposure error due to reverse transfer toner an untransferred toner. An image forming apparatusaccording to the present invention comprises four image forming units, andconfigured to be photoreceptor cleanerless in a 4-drum tandem manner. Each image forming unit includes a photoreceptor, or, a charger, or, an exposure apparatus, or, and a developing apparatus, or. When exposure intensities Iy, Ic, Im, and Ik are assumed for exposure sources of the exposure apparatuses in the image forming units which form yellow, magenta, cyan, and black images, respectively, the exposure intensities are configured to satisfy conditions of Ik&#x2267;Ic&#x2267;Im&#x2267;Iy and Ik&#x3e;Iy. This decreases an exposure error (image hysteresis) in an image formed on paper.

Image forming apparatus

According to one embodiment an ink jet apparatus includes, an ink jet head, a first tank, a second tank, a third tank, a first flow channel, a second flow channel, and a flow control mechanism. The first tank is disposed upstream of the ink jet head with respect to a flow of ink. The second tank is disposed downstream of the ink jet head with respect to the flow of ink. The third tank is disposed downstream of the ink jet head with respect to the flow of ink. The first flow channel connects the first tank to the ink jet head and connects the ink jet head to the second tank and the third tank. The second flow channel connects the second tank and the third tank with the first tank. The flow control mechanism controls a pressure state of at least one of the second tank and the third tank.

Ink jet apparatus and liquid circulating method

An image forming apparatus includes an apparatus main body, a transport mechanism that is provided in the apparatus main body and transports a sheet, a recording head to record an image by discharging ink to the sheet transported by the transport mechanism, a sheet guide that is provided to be opposite to the recording head and guides the sheet, a transport roller provided at an upstream side of the sheet guide in a sheet transport direction, an ejection roller provided at a downstream side thereof, and a transport unit that integrates the medium guide, the transport roller and the ejection roller and is provided to freely come in and out of the apparatus main body.

An image forming apparatus includes a carriage mounted with a recording head of an ink-jet system, a carriage driving mechanism, and a sheet conveying mechanism that conveys a sheet in a predetermined direction. The carriage is moved in a direction orthogonal to the conveying direction of the sheet by the carriage driving mechanism. A sheet guide member is arranged in a position below the recording head and opposed to the recording head. A sheet passes over a guide section of this sheet guide member. A heater is provided in the sheet guide member. This heater heats the guide section.

Method and apparatus for forming image

An image forming apparatus includes a sheet stacking unit that stacks and stores the sheet before printing, a first conveying path that conveys the sheet from this sheet stacking unit, a second conveying path that conveys the sheet from this first conveying path to a space between the recording head and a sheet guide member while reversing the sheet, a third conveying path that conveys the sheet from the first conveying path to a temporary storing unit in a state in which a front-to-rear direction of the sheet is maintained, a fourth conveying path that conveys the sheet from the temporary storing unit to the space in a state in which the front-to-rear direction of the sheet is maintained, a first switching mechanism that switches a conveying direction of the sheet, and a second switching mechanism that guides the sheet.

An image forming apparatus for printing on a sheet by a recording head, includes a sheet transport mechanism to transport the sheet in a specified direction; a paper loading unit to contain the stacked sheet before printing; a second transport mechanism to transport the sheet through a second transport path from the paper loading unit to a temporal containing unit a state where a front-back direction of the sheet is kept; and a third transport mechanism to transport the sheet through a third transport path from the temporal containing unit between the recording head and the sheet guide member in a state where the front-back direction of the sheet is kept.

An image forming apparatus includes an apparatus body, a conveying mechanism that is provided in this apparatus body and conveys a sheet, a recording head that moves along a moving path orthogonal to a conveying direction of the sheet, ejects an ink to the sheet to print an image on the sheet, and, after the printing is finished, stands by in a first standby position on one end side of the moving path, and a CPU that moves the recording head that is on standby in the first standby position to an arbitrary position of the moving path.

An image forming apparatus includes a conveying path that continues to a paper feeding unit and a paper discharge unit, a conveying mechanism that conveys a sheet along the conveying path, plural liquid ejecting heads that eject liquid onto the sheet conveyed on the conveying path, a sensor that is provided in a position between the plural liquid ejecting heads and the paper discharge unit and measures the glossiness of the sheet on which the liquid is ejected, and a control mechanism that compares the glossiness of the sheet immediately after the liquid is ejected and the glossiness measured by the sensor to calculate drying time of the liquid and controls conveying speed of the conveying mechanism to equalize conveying time for the sheet from the plural liquid ejecting heads to the paper discharge unit with the drying time.

Image forming apparatus and printing control method

An image forming apparatus includes an image forming unit and a supporting mechanism that supports this image forming unit. A feed tray for placing sheets thereon is provided in a rear part of the image forming unit. The supporting mechanism includes a base member and a turntable. The turntable can move along a guide section to a first position on a rear side and a second position on a front side with respect to the base member. The supporting mechanism includes a rotation stopping mechanism that prevents the turntable from rotating when the turntable is in the first position and a rotating mechanism that rotates the turntable in a horizontal plane in a state in which the turntable has moved to the second position.

An ink jet recording apparatus comprising a color ink container having a capacity Vaccommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V(VV) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, a stirring container mixing the color ink and the reaction liquid at a mixing ratio of S:S(the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.

Growing community of inventors

Yokohama, Japan

Masashi Hiroki