Canon Kabushiki Kaisha

Tsuguhiro Fukuda

Masami Ikeda

Nobuyuki Kuwabara

Asao Saito

Seiichiro Karita

Hiroyuki Ishinaga

Tsutomu Abe

Toshihiro Mori

Takashi Watanabe

Kenjiro Watanabe

Akio Saito

Hiroshi Sugitani

Kazuaki Masuda

Akira Goto

Tsuyoshi Orikasa

Yoshifumi Hattori

Masaaki Izumida

Koichi Sato

Kunihiko Maeoka

Ryoichi Koizumi

Shigeaki Tanaka

Tsutomu Katoh

Hiroshi Nakagomi

Toshio Kashino

Takahiro Mori

Hiromitsu Hirabayashi

Hiroshi Tajika

Noribumi Koitabashi

Hajime Yamamoto

Atsushi Arai

Teruo Arashima

Masashi Miyagawa

Mineo Kaneko

Hirofumi Hirano

Hideo Saikawa

Makiko Kimura

Kazuhiro Nakajima

Jun Kawai

Makoto Kashimura

Mitsuru Kurata

Haruyuki Matsumoto

Tetsuo Kimura

Takashi Ohba

Seiichirou Karita

A recording apparatus uses a liquid recording head for effecting recording by ejecting liquid through ejection outlets corresponding to heat generation elements provided in the recording head. The recording head has a heating device for heating the recording head. A controller will select a heat generating element from among the heat generating elements to correct a temperature distribution of the recording head resulting from the heating by the heating device such that the heat generating element generates heat to such an extent that liquid for recording is not ejected through the ejection outlet during the temperature correction.

Liquid jet recording head having controller for controlling temperature distribution

A recording apparatus and method of controlling the apparatus includes a recording head for ejecting liquid ink for recording by heat energization, a temperature change rate detecting device for detecting the temperature change rate of the recording head in a normal state, a storage device for storing the temperature change rate information, a determining device for determining the average ejection duty cycle from recording data, an obtaining device for obtaining information relating the temperature change rate in the normal state to the average ejection duty cycle, and a discriminating device for discriminating an abnormality of the recording head determined by the information relating the temperature change rate in the normal state to the average ejection duty cycle, and the temperature change rate detected by the temperature change rate detecting device.

Recording apparatus having abnormality determination based on temperature and average ejection duty cycle

An ink jet printing head for effecting printing by ejection of ink includes a first electrothermal transducer having a heat generating resistor with a first area and wiring electrically connected with the heat generating resistor; a second electrothermal transducer having a second heat generating resistor with an area which is different from the area of the first heat generating resistor; wherein bubbles are produced in ink materials upon application of electric signals to the electrothermal transducers, by which different volumes of ink materials are ejected; wherein the first and second electrothermal transducers have substantially the same bubble production threshold voltage.

Ink jet printing head, ink jet head cartridge and printing apparatus

The present invention involves recording apparatus having such a recording head that records using thermal energy. The recording head has a substrate which includes plural thermal energy generating elements for generating thermal energy, plural wiring lines electrically connected with associated said thermal energy generating elements, and a temperature detecting element built in the substrate. This temperature detecting element is either a diode or a transistor.

Substrate having a built-in temperature detecting element, and ink jet apparatus having the same

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

Ink jet head, ink jet apparatus and wiping method therefor

An ink jet head includes a first member provided with an ejection energy generating element for generating energy contributable to ejection of ink; a second member provided with a recess for defining an ink passage with a trapezoidal cross-section by being coupled with the first member, corresponding to the ejection energy generating element; and a third member provided with an ejection outlet which communicates with the ink passage and through which the ink is ejected.

Ink jet head having trapezoidal ink passages, ink cartridge and

An ink-jet recording head for discharging ink by imparting heat energy to the ink, wherein heaters (8a, 8b) for warming a board are provided on the board (1) provided with a discharging heater array (6) as a group of discharging warming heaters (5) for generating thermal energy at both sides of the discharging heater array (6) as well as sensors (2a, 2b) for detecting the temperature of the board are provided. Each of the sensors is disposed at the positions, at which a time required for the influence due to temperature change only when a predetermined ink discharging heater is energized, reaches said positions is substantially equal to a time required for the influence due to temperature variations when each of the warming heaters (8a, 8b) is energized, reaches said positions. Therefore, the recording head temperature control can be carried out with a high degree of accuracy and at excellent response in a stabilized mode.

Ink-jet recording head, board for said head and ink-jet recording

A liquid jet head includes a heat generating element for producing a bubble to eject liquid from the head, a heat acting zone in which heat generated by the heat generating element produces a bubble in the liquid, a liquid supply passage adjacent the heat acting zone and having a liquid supply opening, with a center, for supplying liquid to the heat acting zone, and a liquid ejection passage adjacent the heat acting zone and having an orifice, with a center, through which the liquid is ejected, the liquid ejection passage including a diverging portion extending in a direction from the heat acting zone toward the orifice. A first plane that includes a first center line passing through the center of the orifice and along a direction of liquid ejection through the orifice, and a second plane that includes a second center line passing through the center of the liquid supply opening and along a direction of the supply of liquid from the liquid supply passage to the heat acting zone, cross in the diverging portion of the liquid ejection passage. At least a portion of the liquid supply passage and at least a portion of the diverging portion have a common, collinear surface substantially parallel to the second center line.

Liquid jet head with nonlinear liquid passages having a diverging portion

An ink tank for storing recording ink comprises an ink storage section including an ink holding member for holding ink and substantially entirely occupying an ink storage space and a ventilation section having a vent hole communicating with the interior of the ink tank with atmosphere, the ventilation section including an ink-repellent member having an ink-repellent character. The ink holding member can be formed of one porous member or two porous members, one of high and one of low porosity. The member with high porosity is provided adjacent an ink supply port. An ink jet recording head also comprises the same ink tank and an ink jet recording head section including an ink discharge port for discharging ink, an ink passage communicating with the ink discharge port and an energy generation element for generating energy utilized for ink discharged. Further an ink jet recording apparatus includes the same ink jet recording head.

Ink jet recording unit having an ink tank section containing porous

A substrate for a liquid jet recording head includes a plurality of built-in energy elements forming an array for generating thermal energy for ejecting liquid, built-in electrode wiring for supplying electric signals to the energy generating elements and first and second built-in temperature sensors disposed outside the array and adjacent opposite ends of the array for detecting a temperature of the substrate. First and second built-in heaters are disposed outside the array and adjacent opposite ends of the array for heating the substrate.

Ink jet substrate including plural temperature sensors and heaters

A liquid jet recording head includes a heat generating element; a heat acting zone in which heat generated by the heat generating device acts on liquid; a liquid feeding passage adjacent to the heat acting zone having a liquid supply opening for supplying liquid to the heat acting zone; a liquid ejection passage adjacent the heat acting zone and having an orifice through which the liquid is ejected; wherein a center line passing through the center of the liquid supply opening along a direction of the liquid supply from the liquid supply passage to the heat acting zone is directly across a wall constituting the liquid ejection passage.

Liquid jet recording head with nonlinear liquid passages and liquid jet

A liquid-jet recording head comprises an ejection opening for ejecting liquid, a liquid path communicating to the ejection opening and a substrate having an energy-generating element provided in correspondence with the ejection opening. The substrate is combined with a heat-capacity member and the heat accumulated in the substrate is efficiently released through the heat-capacity member.

Recording head having cooling mechanism therefor

A thermal transfer material, comprising: a support, an intermediate layer and a heat-transferable ink layer disposed in the order named on the support. The intermediate layer comprises oxidized polyethylene having a number-average molecular weight of 1300-2500, and at least one species selected from polyoxyethylene alkylaryl ether, fatty acid, resin acid, amine and sulfuric acid ester salt. The thermal transfer material provides a transfer image of high density and clear edges without lacking even on a recording medium having poor surface smoothness.

Thermal transfer material

An erroneously recorded image among recorded images on a recording medium is corrected by a correction sheet comprising an adhesive layer on a support. The adhesive layer is heated to develop an adhesive force and caused to adhere to the error image and peel the error image when the correction sheet is separated from the recording medium. The adhesive layer comprises a laminate structure including a separation prevention layer and an upper layer, and the separation prevention layer is in charge of cohesion strength, intimate adhesion to support and flexibility under heating of the adhesive layer. Because of the laminate adhesive layer structure, the correction sheet allows for adequate correction of an error image even on a recording medium with poor surface smoothness without causing correction failure, such as reverse transfer.

Correction sheet and correction method

Growing community of inventors

Yokohama, Japan

Tsuguhiro Fukuda