Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Kabushiki Toshiba

Yoshiaki Kaneko

Minoru Yoshida

Osamu Takagi

Ken Iguchi

Hiroyuki Taguchi

Takahito Kabai

Hiroyuki Ishikawa

Kazuhiro Hara

Takashi Kado

Kazuhiko Ohtsu

Hiroshi Hashidume

Takahisa Hirano

Makoto Tani

Masashi Hiroki

Takao Izumi

Takeshi Watanabe

Tetsuya Sato

Tomomi Iijima

Yasushi Kuribayashi

Atsushi Kubota

Takaya Kitawaki

Taiki Goto

Kimiaki Furukawa

Shinichiro Hida

Akimasa Toyama

Takeshi Kado

An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material that is not thermally decolorizable; a second image forming unit which forms a second image on a second recording medium with a second material that is thermally decolorizable; a fixing device which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a controller which controls the fixing device so that a temperature of the fixing device is lower than a decolorizing temperature of the second material when the second recording medium reaches the fixing device.

Image forming apparatus having fixing device that responds to request when using decolorable ink

According to one embodiment, an ink jet head includes: a cover including an opening; a flexible cable extending from the opening toward an outside of the cover and having a rigidity lower than the cover; a protection member configured to have rigidity higher than the flexible cable, arranged between the flexible cable and the opening of the cover, and protruding toward an outside of the opening of the cover, while both end portions of an outer end edge of the opening are inclined or curved in a direction in which the flexible cable extends from the opening; and a sealing arranged in the opening in which the flexible cable and the protection member are arranged.

Ink jet head and ink jet recording device

An ink circulation device for an ink jet head includes a first ink storage unit that stores ink to be supplied to an ink jet head, a second ink storage unit that stores ink to be returned from the ink jet head, a pump that operates according to an electric signal to transport the ink from the second ink storage unit to the first ink storage unit, a filter between the pump and the first ink storage unit, a first pressure sensor configured to detect an internal pressure of the first ink storage unit, a second pressure sensor configured to detect an internal pressure between the pump and the filter, and a drive circuit configured to generate the electric signal according to a pressure difference between the internal pressure detected by the second pressure sensor and the internal pressure detected by the first pressure sensor.

Ink circulation device for ink jet head

In accordance with an embodiment, an ink circulation device comprises an ink supply section, an ink return section, an ink circulation pump, a filter and a bypass section. The filter partitions an upstream side ink flow path arranged between an ejection section of the ink circulation pump and the ink supply section into a first flow path communicating with the ejection section of the ink circulation pump and a second flow path communicating with the ink supply section. The bypass section is arranged at the upper part of a vertical direction with respect to the filter, directly communicates the first flow path with a downstream side ink flow path arranged between the ink return section and a suction section of the ink circulation pump. An inkjet recording device of the present embodiment comprises the foregoing ink circulation device.

Ink circulation device and inkjet recording device

An ink jet recording apparatus includes: a first pump configured to supply ink introduced from an ink storage section to an ink jet head; a second pump configured to suck ink and discharge the sucked ink to a discharge chamber; and a control device configured to drive the first pump and the second pump with same-phase driving voltage waveforms to make discharge timing of the first pump matching with that of the second pump, wherein an ink flowing path from the discharge section of the first pump to a center part of the discharge chamber and an ink flowing path from the discharge section of the second pump to the center part of the discharge chamber have the same length as each other and have the same cross-sectional shape as each other.

Ink jet recording apparatus and ink supply device

In accordance with an embodiment, an ink circulation device comprises a pressure chamber including at least two flow holes through which ink flows; a piezoelectric vibration plate constituting a part of a wall of the pressure chamber and to be driven to increase or decrease an inner volume of the pressure chamber; a valve for opening and closing at least one of the two flow holes; a heater affixed on the piezoelectric vibration plate; and a connection section connecting the pressure chamber to an inkjet head.

Ink circulation device and printer

A liquid circulation device comprises a liquid chamber connected with a liquid discharge section that discharges liquid and able to hold the liquid; a circulation section configured to circulate the liquid in a flow path containing the liquid chamber and the liquid discharge section; a liquid replenishment section configured to replenish the liquid to the liquid chamber; a gas control section configured to be able to pressurize or decompress the liquid chamber; and a control section configured to replenish the liquid through the liquid replenishment section in a case in which pressure of the liquid discharge section is in a predetermined reference range and lower than a predetermined threshold value, pressurize the liquid discharge section by pressurizing the liquid chamber through the gas control section in a case in which the pressure is lower than the reference range.

Liquid circulation device, liquid discharge device and control method for the same

An inkjet recording apparatus according to an embodiment includes an ink jet head, a diaphragm-type first pump, a diaphragm-type second pump and a control device. The inkjet head ejects ink to an image receiving medium. The first pump supplies ink introduced from an ink storage section to the ink jet head. The second pump sucks ink that is not discharged from the ink jet head and discharges the sucked ink to a discharge chamber adjacent to a discharge section of the first pump at the upstream part of an ink supply path connected with the ink jet head. The control device drives the first pump and the second pump with same-phase driving voltage waveforms to make discharge timing of the first pump matching with that of the second pump.

Ink jet recording apparatus

An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material which is not thermally decolorized; a second image forming unit which forms a second image on a second recording medium with a second material which is thermally decolorized; a fixing unit which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a control unit which controls the fixing unit so that the temperature of the second recording medium passing through the fixing unit becomes lower than a decolorizing temperature of the second material.

Image forming apparatus and method using decolorable ink

An endless belt for an image forming device includes a base member that is shaped in a loop and is to be rotated around a center of the loop, and a reinforcement tape that is attached to a side of the base member, has two ends that are overlapped with each other, and has a bonding portion between the two ends in the overlapped portion. The bonding portion has an outer portion, an inner portion and a center portion between the inner and outer portions. A length of the center portion in a rotating direction of the base member is greater than a length of the inner portion and a length of the outer portion.

Growing community of inventors

Shizuoka, Japan

Yoshiaki Kaneko