Canon Kabushiki Kaisha

Yoshifumi Hattori

Hideo Saikawa

Masami Ikeda

Akio Saito

Hiroshi Sugitani

Kazuaki Masuda

Tsuyoshi Orikasa

Asao Saito

Toshio Kashino

Tsutomu Abe

Teruo Arashima

Makiko Kimura

Seiichiro Karita

Kenji Aono

Hiroshi Nakagomi

Kenji Kawano

Koichi Tanno

Masashi Kitani

Masami Kojima

Kunihiko Maeoka

Etsurou Suzuki

Nobuyuki Kuwabara

Masaaki Izumida

Takashi Ohba

Shigeaki Tanaka

Yoshihisa Takizawa

Mikio Sanada

Jun Kawai

Isao Ebisawa

Takashi Watanabe

Akira Goto

Ryuichi Ebinuma

Shinya Mishina

Mayumi Yamamoto

Hiroo Ichihashi

Koichi Sato

Hisashi Teraoka

Tsuguhiro Fukuda

Hiromitsu Hirabayashi

Shinichi Sato

Kenjiro Watanabe

Toshiaki Hirosawa

Yoshio Uchikata

Tadashi Hanabusa

Tetsuyo Ohashi

Toshihiko Bekki

Toshihide Wada

Koichi Osumi

Yoji Ara

Masaharu Ikado

Akira Nagashima

Toshiaki Nagashima

Koji Terasawa

Mineo Kaneko

Yoichi Tosaka

Akira Miyakawa

Ryuji Katsuragi

Hiroshi Iida

Shinichi Hirasawa

Norio Hikake

Akira Nagatomo

Yuko Yakushigawa

Yoshie Akiyama

Makoto Aoki

Masanori Takenouchi

Osamu Sato

Kenji Kitabatake

Yutaka Kurabayashi

Katsuhiko Takahashi

Hiroshi Koshikawa

Osamu Morita

Masashi Miyagawa

Minoru Nozawa

Genji Inada

Yasuhiro Yano

Keiichi Murai

Tsuyoshi Eida

Tadashi Yamamoto

Masashi Ogasawara

Shinichi Tochihara

Yasushi Takatori

Masasumi Nagashima

Takao Yamamoto

Kumiko Mafune

Haruyuki Matsumoto

Haruhiko Terai

Naohito Asai

Yasuhiro Unosawa

Tetsuo Kimura

Osamu Nishiwaki

Masahiko Tonogaki

Eriko Ono

Takayoshi Tsutsumi

Haruo Uehara

Etsuro Suzuki

Kou Hasegawa

Eriko Saito

Keiji Nagira

Masamichi Suzumura

To reduce a quantity of uselessly consumed ink when an ink jet head is recoverably activated, the capacity of an ink path communicated with a group of ejecting ports having a small flow rate coefficient is determined to be smaller than that of an ink path communicated with a group of ejecting ports having a large flow rate coefficient. While all of plural groups of, ejecting ports are fully covered with a common recovering cap with the aid of sucking means, ink is, sucked from the plural groups of ejecting ports. When the ink remaining in the region extending from the plural groups of ejecting ports to predetermined positions in a plurality of ink paths communicated with the plural groups of ejecting ports is discharged, ink discharging positions are dislocated to predetermined positions in a plurality of ink paths to positionally coincide with the predetermined positions in the substantially same timing relationship after ejection recovering treatment starts to be conducted.

Ink jet head, ink jet apparatus and method of recoverably activating in the apparatus

Ink tank which enables accurate detection of existence/absence of liquid even if a storage containing liquid such as ink is stored under a severe environment, and a cartridge including the ink tank, as well as a printing apparatus utilizing the cartridge. A low surface energy processing agent including alkyl polysiloxane and alcohol is coated on prism provided on the bottom portion of ink tank , thereby performing low surface energy processing on the prism

Ink tank, cartridge including the ink tank, and printing apparatus using the cartridge

Provided is a black ink capable of mitigating the dependency on image quality of recording media and giving a high quality image stably, which comprises at least one salt selected from the group consisting of (M1),SO,, CH,COO(M1), Ph_COO(M1), (M1)NO,, (M1)Cl, (M1)Br, (M1)I, (M1),SO,and (M1),CO,, where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group, and a self dispersible carbon black.

Ink, ink set, ink cartridge, recording unit, image recording apparatus and image recording method

An ink container includes a casing, an air vent which is located in the casing, an ink supply opening for supplying ink out of the casing, and an ink absorbing material that is contained in the casing. The ink absorbing material retains ink therein, and has a generally rectangular parallelopipedal shape defined by sides of the ink absorbing material, and also has an ink supply portion for supplying ink to the ink supply opening. The ink absorbing material includes corner portions which are located between adjacent sides of the ink absorbing material. A preventing means prevents complete surface contact between the casing and said ink absorbing material by providing spaces between the casing and ink absorbing material which are in fluid communication with each other with a given space that is adjacent to a particular one of the corner portions that is most remote from the ink supply portion. The air vent is in fluid communication with the spaces.

Vented ink container with internal ink absorber, and ink cartridge having such an ink container

There is disclosed a method and apparatus for recovering an ink jet head having an opening communicating with a discharge port, the opening being provided on a same planar surface on which the discharge port for discharging ink is provided. An area of the opening is larger than an area of the discharge port. The method includes the steps of forcibly introducing gas into the ink jet head simultaneously through the discharge port and the opening, and exhausting the gas introduced into the ink jet head in the introducing step with ink through the discharge port. The gas introduced into the ink jet head enables the ink to be exhausted at an increased velocity in the exhausting step.

Ink-jet recording apparatus and recovery process method of the same

The invention provides an ink comprising a coloring material, a solvent for dissolving or dispersing the coloring material, and an amphoteric polymer having both anionic and cationic groups. The invention also provides an ink-jet recording process and apparatus using such an ink.

Ink, ink-jet recording process and apparatus using the same

An ink jet head includes a first member with an energy generating element for generating energy to eject ink, a second member having an ejection outlet forming member provided with an ink ejection outlet through which the ink is ejected, the second member being affixed to the first member to form a liquid passage in fluid communication with the ejection outlet, and urging means for urging the first and second members together to substantially fix them against each other. The ejection outlet forming member has a jaw connected with a surface of the first member which has the energy generating element, the jaw being adjacent a first member side of the ejection outlet. The following relationships are satisfied, namely, b.gtoreq.5 microns, c.gtoreq.3 microns, and a+b is between 20 and 60 microns, where a is the thickness of the ejection outlet forming member, b is a depth of the jaw, and c is a distance between a connecting portion between the ejection outlet forming member and the first member and an inside end of the ejection outlet.

Ink jet recording head with ejection outlet forming member and urging

An ink jet recording apparatus includes a liquid passage for ejection of ink; a liquid chamber for supplying ink to the passage; a device for mounting the recording head on the ink jet recording apparatus at an angle not more than 45 degrees relative to the horizontal plane; wherein the chamber has an internal surface which is slanted in a direction from an ink inlet thereof toward the liquid passage at the angle of 5-40 degrees relative to an extension of the liquid passage.

Ink jet recording head with ink chamber having slanted surfaces to aid

The present invention is related to an ink jet head comprising a substrate having a support, an intermediate layer provided on said support and a lower layer provided on said intermediate layer, and a heat energy generating member which generates heat energy to be utilized for discharging ink provided on said substrate. The ink jet head is characterized in that ink channels communicated to discharge openings for discharging ink are formed corresponding to the heat generating portions of said heat energy generating member on said heat generating substrate, and the thermal conductivity of said intermediate layer is selected higher than that of said support and higher than that of said lower layer.

Ink jet head having a silicon intermediate layer

An ink jet recording apparatus comprises an ink tank containing ink; a recording head for performing recording by selectively ejecting ink; a mounting portion for mounting the ink tank and the recording head; a liquid passage coupling portion provided on either or both of the ink tank and the recording head for separating or connecting the ink passages in the ink tank and the recording head; a holding portion provided on either or both of the ink tank and recording head for guiding the ink tank to the recording head in order to hold them separably; and an electrically or mechanically connecting portion provided on either or both of the recording head and mounting portion for electrically or mechanically connecting the recording head to or separating it from the mounting portion.

Ink jet recording apparatus and a method for installing ink jet

An ink jet head includes a base member, a first member having recesses and coupled with the base member to form ink passages using the recesses and a second member integral with the first member and extending at an angle from an end of the first member, the second member having ink ejection outlets communicating with the ink passages.

Ink jet apparatus

Provided is an ink-jet recording process for forming a color image on a recording medium using a liquid formulation and a color ink in combination, wherein the liquid formulation contains a cationic polymer having a weight-average molecular weight in the range of from 400 to 1,400, and the liquid formulation and the ink are each ejected from a recording head having an ink ejection volume per dot of from 2 to 25 picolitters.

Ink-jet recording process using liquid formulation and ink in combination

Disclosed herein is a water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group directly or through another atomic group to the surface of carbon black, a humectant of the general formula

Water-based pigment ink, and ink-jet recording method and instruments

Three discharge port groups, each having a plurality of discharge ports, discharge inks of three primary colors to record swaths of the respective colors on a recording medium and repeat the discharging to complete a record. Joints of each of Y, M and C color swaths are spaced from joints of swaths of the other two colors by an equal distance, and the discharge port groups are offset from each other by 8n times of a discharge port pitch in a direction of feed of the recording medium. In a number of image buffers corresponding to the discharge ports, image data in one buffer is separated from image data in a different image buffer by an amount that is an integer multiply of one 8 bit byte.

Ink jet recording apparatus and method of recording with separated image

Growing community of inventors

Yamato, Japan

Yoshifumi Hattori