Hitachi Koki Co., Ltd.

Ricoh Printing Systems, Ltd.

Hitachi Printing Solutions, Ltd.

Fuji Photo Film Company, Limited

Kazuo Shimizu

Kunio Satou

Takahiro Yamada

Hitoshi Kida

Shinya Kobayashi

Osamu Machida

Katsunori Kawasumi

Masao Mitani

Kenji Yamada

Yoshikane Matsumoto

Toshitaka Ogawa

Makoto Kurosawa

Takuji Torii

Shigenori Suematsu

Nobuhiro Noto

Yoshitaka Akiyama

Masatoshi Sakata

Lee Chahn

Hiroshi Sasaki

Kunihiro Tamahashi

Tomohiko Koda

Kenichi Kugai

Akemi Ouchi

Yoshinari Suzuki

Hidetoshi Fujii

Kazuaki Akimoto

Takashi Sekino

Keiji Kunimi

A substrate is provided on which wires can be formed satisfactorily using a dispersion liquid of metal microparticles without causing disconnection or short circuit. The wiring substrate comprises a substrate, an organic membrane formed on the substrate, and a metal wire formed on the organic membrane. An arithmetic mean deviation Ra of the profile of the surface of the organic membrane where the metal wire is formed is not less than 60 nm and not more than 5&#xd7;10D, where D is the width of the metal wire. The contact angle with respect to water on the surface of the organic membrane where the metal wire is formed is not less than 110&#xb0;.

Wiring substrate

To coat a solution on both surfaces continuously in such a state that an edge portion of the substrate is so constructed as to be fixed, and the substrate is attached to a substrate fixing frame having a positioning mechanism.

Apparatus for forming thin film and method for forming the same

An ink jet head includes: a chamber plate having a plurality of pressuring chambers formed therein for storing an ink; a vibrating plate bonded to the chamber plate; a housing having an ink flow path through which an ink is supplied into the pressuring chambers; an orifice through which an ink is ejected from the pressuring chambers; and a longitudinal vibration mode piezoelectric element for generating pressure under which an ink droplet is ejected through the orifice. A thickness of the vibration plate is from 5 &#x3bc;m to 10 &#x3bc;m.

Ink jet head and droplet ejection device having same mounted thereon

An ink jet head includes: a pressure chamber that stores an ink and has an orifice; a filter plate including a through hole portion and a filter portion, the through hold portion disposed separately from the filter portion with a certain gap; a supply unit that supplies the ink through the filter portion to the pressure chamber; and a jetting unit that jets ink droplets through the orifice from the pressure chamber. The filter portion is formed to have a first aperture ratio. At least one through hole is formed on the through hole potion so that the filter portion has a second aperture ratio. The first aperture ratio is smaller than the second aperture ratio.

Ink jet head and ink jet recording apparatus

A piezoelectric element is attached to a diaphragm via a relay member. A length of the relay member is shorter than the length of the piezoelectric element and longer than an active section in the piezoelectric element with respect to a direction orthogonal to a direction in which a plurality of nozzles are aligned. Also, a surface of the relay member that attached to the diaphragm has a width that is shorter than the piezoelectric element with respect to the direction in which the nozzles are aligned.

Inkjet head having relay member interposed between piezoelectric element and diaphragm

A computer portionof a printer includes a memory storing a printer driver softwareand nozzle profile data. The printer driver softwareincludes a raster image processor (RIP). When the RIPreceives document data, the RIPconverts the document datainto bitmap datawhich is one dot/one bit data for 300 data/inch. Then, the nozzle data converting portionconverts the bitmap datainto driving databased on the nozzle profile data. At this time, each bit of the bitmap datais replaced by 16 bits. That is, the data amount is increased to 16 times of the bitmap data. Accordingly, fine control of ink ejection can be achieved.

Line scanning type ink jet recording device capable of finely and individually controlling ink ejection from each nozzle

A recording headhas a plurality of nozzle orifices aligned in a row extending in a first direction. The recording headis arranged with the nozzle orifices in confrontation with a recording medium P. The recording medium P is moved in a second direction B with respect to the recording head. Also, ink droplets ejected from the nozzle orifices are charged to a charged amount that corresponds to deflection amount of the ink droplets. The charged ink droplets are deflected in a direction perpendicular to a main scanning line. The plurality of ink droplets ejected from the plurality of nozzle orifices impinge on the same pixel position or at a nearby position so that it is possible to impinge multiple droplets at the same pixel position or a nearby position. As a result, it is possible to back up broken nozzles and to reduce recording distortion.

Line scan type ink jet recording device

An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.

Inkjet recording device and ink supplying device employed thereby

An orifice electrode/ink receiving member is attached to an orifice plate that is attached to a recording head module . An ink absorbing member is embedded in a lower surface of the orifice electrode/ink receiving member . A recording ink droplet ejected through an orifice is deflected as needed by an angled electric field and then impinges on a recording sheet to form a recording dot . On the other hand, a refresh ink droplet is deflected by the angled electric field and impinges on the ink absorbing member of the orifice electrode/ink receiving member after flying in a U-turn path. In this configuration, the ink absorbing member provided to the orifice electrode/ink receiving member collects ink, so that there is no need to increase a gap between the recording head module and the recording sheet so much in order to dispose the ink absorbing member , preventing decrease in recording precision and paper jam. Also, it is possible to perform the ink refresh operation using a minimum amount of ink anytime needed without stopping recording operations.

Refresh ink ejection device and inkjet recording device including the refresh ink ejection device

When ink droplets are ejected, angled or splashed where a plurality of minute ink droplets are generated, angled or splashed ink clings on an electrode 401, 402 and increases the amount of electric current conducted therethrough. Hence, the defectiveness of ink ejection can be detected by monitoring the amount of the electric current. When the defectiveness of ink ejection is detected, ejection data D is retrieved and updates the ejection data D based on a condition register S, and set to a defect register E. When the defect register E has only one element that takes a condition value of 1 indicating defectiveness, the corresponding nozzle is identified as defective. The restoring means reallocates dots, which have been originally allocated to the defective nozzle, to neighboring nozzle.

Multinozzle ink jet recording device capable of identifying defective nozzle

When positively charged ink droplets from a defective nozzle impact a negatively charged deflector electrode , the positive charge on condenser flows to the ground via a FET of a photo-coupler . As a result, the electric discharge occurs by an amount equivalent to the charging amount of the ink droplets clinging on the electrode . Because a switching signal is &ldquo;1&rdquo;, the ON resistance of the photo-coupler is large, and the ON resistance of the FET of the photo-coupler is small. Accordingly, the discharge due to the charged ink droplets is detected as a large detection voltage and amplified by an operational amplifier . Because the charger voltage of the condenser is static and has no noise, even when the detection output is highly amplified, noise during the detection is suppressed.

Ink jet recording device capable of detecting defective nozzle with high signal-to-noise ratio

A back electrode is provided at a rear surface side of a recording sheet . An orifice electrode is attached to an orifice plate of a head module . The orifice electrode , the orifice plate , and ink filling in a nozzle element are electrically connected to the ground. The back electrode has the potential corresponding to that of a charging/deflecting signal. With this configuration, the orifice electrode , a pressure chamber , and the back electrode together generates an inclined electric field at a position a close to a center trajectory . A charged ink droplet is deflected greatly by the inclined electric field , at an early stage of the ink flight, and even greater deflection can be achieved as the flight proceeds.

Charging/deflecting device capable of effectively deflecting ink droplet

An ink jet recording device includes a plurality of head modules each formed with a plurality of nozzles. The ink jet recording device prints a test pattern using the all nozzle of the head modules . Precise positions of dots forming the test pattern are detected, based on which positional shifts of the head modules are calculated. The deflection amount and ink ejection timing for each head module are changed based on the detected positional shift. In this manner, positional shifts of the assembled head modules are electrically corrected without mechanically changing the physical positions of the head modules

Ink jet printer capable of adjusting deflection amount in accordance with positional shift of head modules

A single dot on a recording medium is formed by dots of a plurality of ink droplets ejected from different orifices of a head . For example, four dots are formed overlapping one on the other to form a single dot. In order to suppress unevenness in ink density of a recording image due to undesirably shifted impact positions of these dots, impact positions of the dots for the single dots are shifted to the right and left on purpose by &frac14;-dot-worth of distance for each, that is, &frac12;-dot-worth of distance in total. This printing method has a good effect on controlling noise element, which has a high special frequency and causes uneven ink density.

Ink jet recording device capable of controlling impact positions of ink droplets

An ink jet recording device includes a plurality of head modules each formed with a plurality of nozzles for forming dots on a recording sheet When the assembly of the head modules has any positional error, recorded dots will shift to undesirable positions. However, the ink jet recording device of the present invention adjust the dot forming positions to desirable positions in an electrical manner without actually and mechanically moving the head modules both in directions perpendicular to and parallel with a nozzle line.

Growing community of inventors

Hitachinaka, Japan

Kazuo Shimizu