Fujifilm Corporation

Fuji Photo Film Company, Limited

Toshiya Kojima

Gentaro Furukawa

Yasuhiko Kachi

Kenichi Kodama

Katsumi Enomoto

Seiichi Inoue

Seiichiro Oku

Kanji Nagashima

Naoki Kusunoki

Setsuji Tatsumi

Yoshiro Yamazaki

Kazuo Sanada

Hiroshi Inoue

Tsutomu Takatsuka

Tsutomu Yokouchi

Takashi Hoshino

Yuji Inoue

Shigeru Tanaka

Tadahisa Sato

Tsuyoshi Mita

Masahito Katada

Hideki Maeta

Hiroyuki Kohda

Atsuhiro Doi

Yuki Shimizu

Yasuyuki Mochizuki

Masao Nakahara

The liquid supply apparatus has: a main tank which stores liquid; a sub tank which is disposed vertically above a recording head configured to eject the liquid and which is not connected to atmosphere, the sub tank being composed of a deformable member so that a volume of the sub tank is changed depending on a volume of the liquid in the sub tank; a first flow channel which connects the main tank with the sub tank; a second flow channel which connects the sub tank with the recording head; a flow rate determination device which determines a flow rate of the liquid in the second flow channel; a first pressure control device which controls an internal pressure of the main tank according to the flow rate determined by the flow rate determination device; and a second pressure control device which controls an internal pressure of the sub tank so as to fall within a prescribed range.

Liquid supply apparatus, image forming apparatus and liquid supply method

The image forming apparatus includes: a recording head which has a plurality of recording elements; an intermediate transfer medium on which an image is recorded temporarily by the recording head while the intermediate transfer medium implements relative movement with respect to the recording head; an image defect determination device which is disposed on a downstream side of the recording head in terms of a direction of the relative movement of the intermediate transfer medium and which determines whether the image recorded on the intermediate transfer medium includes an image defect or not; a transfer device which is disposed on a downstream side of the image defect determination device in terms of the direction of the relative movement of the intermediate transfer medium and which transfers the image recorded on the intermediate transfer medium, to a recording medium; and an image correction device which creates correction data according to information about the image defect if the image defect determination device determines that the image recorded on the intermediate transfer medium includes the image defect, wherein, if the image defect determination device determines that the image recorded on the intermediate transfer medium includes the image defect, an image based on the correction data is recorded on the intermediate transfer medium by the recording head.

Image forming apparatus with correction device for defect correction

The inkjet recording apparatus includes: print heads each of which has ejection ports through which ink is ejected; main tanks each of which stores the ink; ink supply channels which respectively connect the main tanks with the print heads; subsidiary tanks which are arranged in the ink supply channels and each of which includes an external case and an ink accommodating member that is flexible and arranged in the external case, the ink being supplied from the main tanks to the print heads through the ink supply channels and the ink accommodating members in the subsidiary tanks; a pressure buffer which is connected to spaces in the subsidiary tanks between the external cases and the ink accommodating members; a pressure reducing pump which reduces a pressure Pb inside the pressure buffer; differential pressure valves which are respectively attached to the subsidiary tanks so as to connect the spaces in the subsidiary tanks with an atmosphere; a first pressure gage which measures the pressure Pb inside the pressure buffer; and a second pressure gage which measures pressures Ps inside the spaces in the subsidiary tanks, wherein an operation of the pressure reducing pump to reduce the pressure Pb inside the pressure buffer is performed and the differential pressure valves adjust the pressures Ps inside the spaces in the subsidiary tanks so that the pressure Pb inside the pressure buffer and each of the pressures Ps inside the spaces in the subsidiary tanks have a relationship of Pb&#x3c;Ps, at least while the ink is being ejected from the print heads.

Inkjet recording apparatus and ink supply method

The back pressure adjustment apparatus for a liquid ejection head has: a container having a liquid accommodating chamber which is connected to the liquid ejection head and accommodates liquid to be supplied to the liquid ejection head, and a gas accommodating chamber which accommodates gas; a movable film which separates the liquid accommodating chamber and the gas accommodating chamber, and forms a portion of whole walls of the liquid accommodating chamber; and a pressure adjustment device which causes all or a portion of the movable film to deform so as to adjust pressure of the liquid accommodated in the liquid accommodating chamber.

Back pressure adjustment apparatus for liquid ejection head

The wiring substrate having a recess section and a projecting section formed on at least one surface of the wiring substrate, and wires formed on both the recess section and the projecting section.

Wiring substrate, method of manufacturing wiring substrate, and liquid droplet ejection head

The liquid ejection apparatus includes: a recording head which includes a nozzle and an ejection device, the ejection device ejecting an ejection liquid through the nozzle by applying pressure to the ejection liquid in the recording head; a liquid accommodation unit which is in connection with the recording head and which accommodates a gas, the ejection liquid to be supplied to the recording head, and a non-volatile liquid having a permeability to the gas lower than the ejection liquid, the ejection liquid being separated from the gas by the non-volatile liquid; and a pressure control unit which controls pressure of the ejection liquid in the liquid accommodation unit by moving the gas into and out of the liquid accommodation unit.

Liquid ejection apparatus, image forming apparatus, and liquid ejection method

An ink jet printer has a carriage equipped with a recording head. The carriage is disposed downstream in a feeding direction of a recording medium. The carriage has an optical sensor for measuring dirt on a supply roller. When the supply roller is dirty, a cleaning operation is started to rotate the supply roller as being pressed onto a separation pad. The dirt on the supply roller is measured with the optical sensor, and the cleaning operation lasts until the dirt is removed from the supply roller.

Image recording apparatus

A droplet ejecting apparatus for discharging liquid from nozzles of pressure chambers by supplying liquid from a liquid tank to said pressure chambers and then contracting said pressure chambers by means of piezoelectric elements, comprising:

Droplet ejecting apparatus

An ink jet printer feeds a sheet of recording medium onto a platen, and record an image by ejecting droplets of ink from a print head attached to the platen. The ink jet printer has a media deforming section for deforming a part of the recording medium into a downward projection. The media deforming section includes a wedge above a recording media feeding path, and a wedge receiver below the feeding path to fit with the wedge. The wedge and the wedge receiver are joined together to press the recording medium from above and below, and form the downward projection. While the recording medium passes the platen, the downward projection wipes off ink stain on ribs of the platen.

Ink jet printer and method of cleaning platen

An inkjet recording apparatus that includes an intermediate transfer body that has an image forming surface including an image forming region on which an image is formed by means of the ink droplets ejected from an ink ejection head and a cleaning device which makes contact with the image forming surface of the intermediate transfer body to wipe off and remove adhering material attached to the intermediate transfer body. A second cleaning device makes contact with the first cleaning device to remove adhering material attached to the first cleaning device. An ejection control device controls ink ejection from the head and a recovery device is provided which recovers the adhering material removed by the second cleaning device.

Inkjet recording apparatus and cleaning method

The method manufactures a nozzle plate having nozzle orifices for ejecting liquid droplets. The method comprises: a hole forming step of forming holes in a nozzle forming substrate, each of the holes passing through the nozzle forming substrate and having openings on a surface of a liquid droplet ejection side and a surface of a side opposite thereto of the nozzle forming substrate, the holes having a larger diameter than the nozzle orifices; a liquid-philic film forming step of forming a liquid-philic film on inner walls of the holes, the liquid-philic film blocking at least a portion of each of the holes; a liquid-repelling film forming step of forming a liquid-repelling film on the surface of the liquid droplet ejection side of the nozzle forming substrate, after performing the liquid-philic film forming step; and a nozzle orifice forming step of forming the nozzle orifices in the holes that are filled with the liquid-repelling film, after performing the liquid-repelling film forming step.

Method of manufacturing nozzle plate

Objects of the present invention are to facilitate filling out by hand an electronic paper and to realize digitization of contents with which the electronic paper is filled out by hand with a simple structure. A read image is obtained by optically reading a reading-object of the electronic paper. Based on the document information written on the electronic paper and writing-conditions during document writing, which are represented by the document information, a display image of the document in accordance with the read image information is formed. A written image is separated and extracted by converting a density only of pixels among the respective pixels of the read image, whose densities vary in accordance with the document writing and which correspond to a portion, to which ink of a pen for the handwriting is not adhered.

Electric paper reading system

The liquid ejection head includes: a plurality of ejection ports which eject liquid; a plurality of pressure chambers which are respectively connected to the ejection ports; a plurality of piezoelectric elements which respectively deform the pressure chambers, the piezoelectric elements being arranged on sides of the pressure chambers opposite to sides thereof where the ejection ports are formed; a common liquid chamber which supplies the liquid to the pressure chambers, the common liquid chamber being arranged on the sides of the pressure chambers opposite to the sides thereof where the ejection ports are formed; a plurality of wiring members which have electrodes for driving the piezoelectric elements, respectively, each of the wiring members being formed in such a manner that at least a portion thereof rises through the common liquid chamber in a direction substantially perpendicular to a plane on which the piezoelectric elements are arranged; and a drive circuit which drives the piezoelectric elements, the drive circuit being arranged on a wall of the common liquid chamber opposite to a side thereof where the piezoelectric elements are arranged, wherein the electrodes and the drive circuit are composed and covered integrally with resin.

Liquid ejection head, image forming apparatus and method of manufacturing liquid ejection head

The liquid ejection apparatus includes: a liquid ejection head having a nozzle forming surface formed with nozzles from which a first liquid is ejected; a wiping processing device which carries out a wiping process of the nozzle forming surface of the liquid ejection head; and a movement device which causes relative movement between the liquid ejection head and the wiping processing device, wherein the wiping processing device includes: a wiping member which wipes the nozzle forming surface of the liquid ejection head; and a second liquid supply device which supplies a second liquid which has undergone a deaeration process, to a vicinity of a contact region between the wiping member and the nozzle forming surface of the liquid ejection head, on a side of forward travel of the wiping member, in the wiping process.

Liquid ejection apparatus and maintenance method for liquid ejection head

The image forming apparatus comprises: a recording head which discharges droplets of liquid onto a recording medium; a dissolved gas amount estimating device which estimates an amount of dissolved gas contained in the liquid inside the recording head; and a liquid restoring device which carries out restoration processing of the liquid inside the recording head, if an estimated value of the amount of the dissolved gas estimated by the dissolved gas amount estimating device exceeds a prescribed reference value.

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Kanagawa, Japan

Toshiya Kojima