Canon Kabushiki Kaisha

Takashi Ohba

Tsutomu Abe

Tsuyoshi Orikasa

Yoshifumi Hattori

Masami Ikeda

Toshio Kashino

Akio Saito

Hiroshi Sugitani

Kazuaki Masuda

Teruo Arashima

Asao Saito

Makiko Kimura

Jun Kawai

Kunihiko Maeoka

Hiroshi Nakagomi

Seiichiro Karita

Hideo Saikawa

Hiroshi Iida

Kenjiro Watanabe

Isao Ebisawa

Masaki Inaba

Akira Nagatomo

Tsuyoshi Baba

Takashi Watanabe

Akira Goto

Nobuyuki Kuwabara

Masaaki Izumida

Kazuo Iwata

Haruyuki Matsumoto

Koichi Sato

Tsuguhiro Fukuda

Shigeaki Tanaka

Tsunenobu Satoi

Toshio Tsuda

Fumio Ichikawa

Hiroshi Haruyama

Masahiro Chiba

Tadayuki Nakousai

Hiroko Ogawa

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

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

A liquid-discharge recording apparatus such as an ink-jet printer comprises: a liquid-discharge recording unit having an emission energy generating device including an electrothermal energy converting device which can heat a recording liquid such as an ink to form liquid droplets in response to an electrical signal, in which this recording unit emits the liquid droplets and deposits them on a recording paper and thereby recording thereon; a recording unit control circuit which can set and supplies the electrical signal to form the liquid droplets to the emission energy generating device in response to a recording signal; and an emission controller for setting the electrical signal to form the liquid droplets to the recording unit control circuit when a power supply is turned on, thereby allowing the recording unit to and emit the liquid droplets in accordance with an environmental condition such as a temperature of the recording liquid. With this dedicated emission controller, the proper emission condition is set and preheating processes and preliminary emitting processes are executed prior to starting the printing after the turn-on of the power supply of the printer, so that the printing state can be promptly and easily optimized by a simple software.

Liquid discharge recording apparatus having apparatus for effecting

An ink jet head includes first and second members for constituting liquid passages by joining them together; the second member has an ejection outlet forming member having a thickness a and is provided with a jaw having a dimension b, wherein an inside end of an ejection outlet of the ejection outlet forming member is displaced by a distance c from adjacent wall of a liquid passage, with b.gtoreq.5 microns, c.gtoreq.3 microns, and 20 microns.ltoreq.a+b.ltoreq.60 microns.

Ink jet recording head and ink jet apparatus having same

An ink jet head includes first and second members for constituting liquid passages by joining them together; and a clamp for applying a line pressure to one of the members. By using such a clamp, the pressing force can be concentrated in a line to provide a uniform pressing force to ensure reliable clamping.

Ink jet recording head having constituent members clamped together

Ink jet head with contoured outlet surface

A liquid-discharge recording apparatus such as an ink-jet printer comprises: a liquid-discharge recording unit having an emission energy generating device including an electrothermal energy converting device which can heat a recording liquid such as an ink to form liquid droplets in response to an electrical signal, in which this recording unit emits the liquid droplets and deposits them on a recording paper and thereby recording thereon; a recording unit control circuit which can set and supplies the electrical signal to form the liquid droplets to the emission energy generating device in response to a recording signal; and an emission controller for setting the electrical signal to form the liquid droplets to the recording unit control circuit when a power supply is turned on, thereby allowing the recording unit to emit the liquid droplets in accordance with an environmental condition such as a temperature of the recording liquid. With this dedicated emission controller, the proper emission condition is set and the preheating processes and preliminary emitting processes are executed prior to starting the printing after the turn-on of the power supply of the printer, so that the printing state can be promptly and easily optimized by a simple software.

Disclosed in an ink-jet head assembling method for executing alignments between a top plate and a heater board. The method comprises steps of holding the top plate by fingers, moving the fingers to bring the top plate to a position above the heater board with adhesives having been applied, releasing the holding of the fingers, enabling them to engage with an ink reception port of the top plate, and moving the fingers sideways to abut against the ink reception port, and adjusting a relative position between heaters of the heater board and nozzles of the top plate.

Ink-jet head assembling method

A liquid-discharge recording apparatus includes a recording head, an emission signal generator, and a heating signal generator. The recording head includes electrothermal energy converting elements for generating energy used to emit liquid in response to an emission signal from an emission signal generated by the emission signal generator. The heating signal generator generates an electrical signal applied to the electrothermal energy converting elements of sufficient level for heating the liquid, without discharging, during a first heating mode when power is supplied to the apparatus and for generating an electrical signal during a second heating mode, subsequent to the first heating mode, when recording begins after an interruption in power supply. In addition, a controller is provided for controlling a heater such that the heater is deactivated when the discharge opening of the recording head is capped. A liquid-discharge recording method is applied to the liquid-discharge recording apparatus.

Liquid discharge recording apparatus and method for maintaining proper

An ink-jet head assembling apparatus assembles a nozzle head of an ink-jet head for discharging an ink in a predetermined pattern from a heater board having a plurality of heaters for heating the ink, and a top plate member having a plurality of discharge orifices for discharging the ink heated by the corresponding heaters in a jet-like manner. The apparatus is provided with a first position detection mechanism for measuring forming positions of the discharge orifices of said top plate member, a second position detection mechanism for detecting arranging positions of the heaters on said heater board, a position adjustment mechanism for comparing a first detection result detected by said first position detection mechanism with a second detection result detected by said second position detection mechanism, and moving said top plate member relative to said heater board by a shift amount between the two detection results so as to align the positions of the heaters with the positions of the corresponding discharge orfices, and an adhesion mechanism for adhering said top plate member and said heater board aligned by said position adjustment mechanism to each other.

Ink-jet head assembling apparatus and method

A recording liquid comprises a liquid composition containing water-soluble dyes as coloring component, characterized in that C.I. Food Black 2 and one or more dyes in different color or colors are used in combination as said coloring component.

Recording liquid

Growing community of inventors

Zama, Japan

Takashi Ohba