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Author

Toshitami Hara

Bio: Toshitami Hara is an academic researcher from Canon Inc.. The author has contributed to research in topics: Recording head & Transducer. The author has an hindex of 2, co-authored 2 publications receiving 1378 citations.

Papers
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Patent
Toshitami Hara1
13 May 1980
TL;DR: In this article, a liquid jet recording process and liquid jet head are driven by heat energy generated by an electrothermal transducer, and the operating conditions as to heating and others are disclosed.
Abstract: A liquid jet recording process and liquid jet recording head are driven by heat energy generated by an electrothermal transducer. The operating conditions as to heating and others are disclosed and further desirable dimensions of the electrothermal transducer are determined by referring to various characteristics of the structure materials and others.

1,374 citations


Cited by
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Patent
12 Nov 2008
TL;DR: In this article, the arrangement of ejection openings is determined so that between the last scanning for completing the black image and the first scanning for printing of the color image, scanning with no performing printing exists.
Abstract: A high-quality image is printed with reduced bleeding in colors that may appear at a boundary between a black image and a color image. A head for ejecting black ink and a head for ejecting color ink perform three times of scanning while feeding is carried out therebetween for moving the printing medium by four pitches of ejection openings arranged on the heads, different ejection openings are caused to correspond to a scanning area, which corresponds to the four pitches, and multi-pass printing is performed to complete printing on the area. The black head completes printing of the black image, and then, the color head completes printing of the color image adjacent to the black image. The arrangement of ejection openings is determined so that between last scanning for completing printing of the black image and the first scanning for printing of the color image, scanning with no performing printing exists.

413 citations

Patent
07 Sep 1982
TL;DR: In this paper, a thermal ink jet printer is disclosed in which ink droplets are ejected from an orifice by the explosive formation of a vapor bubble within the ink supply due to the application of a two part electrical pulse to a resistor within the Ink supply.
Abstract: A thermal ink jet printer is disclosed in which ink droplets are ejected from an orifice by the explosive formation of a vapor bubble within the ink supply due to the application of a two part electrical pulse to a resistor within the ink supply. The electrical pulse comprises a precurser pulse and a nucleation pulse; the precurser pulse preheats the ink in the vicinity of the resistor to a temperature below the boiling temperature of the ink so as to preheat the ink while avoiding vapor bubble nucleation within the ink supply and the subsequently occuring nucleation pulse very quickly heats the resistor to near the superheat limit of the ink.

395 citations

Patent
Toshihiko Ujita1
01 Feb 1991
TL;DR: In this paper, an ink cartridge detachably mountable to an ink jet recording apparatus is presented, which includes an ink container for containing the ink and an adaptor having a receptor for detachably receiving the ink container and an information medium for storing information relating to the ink.
Abstract: An ink cartridge detachably mountable to an ink jet recording apparatus, the ink cartridge containing ink to be supplied to a recording head includes an ink container for containing the ink; and an adaptor having a receptor for detachably receiving the ink container and an information medium for storing information relating to the ink, the information being transmitted to the ink jet recording apparatus when the ink cartridge is mounted therein.

277 citations

Patent
29 Jan 1997
TL;DR: In this paper, an ink-jet recording head includes a discharge-port portion including a first dischargeport portion continuing from a discharge port, and a second dischargeport part communicating the first discharge port portion with a bubble generation chamber.
Abstract: An ink-jet recording head includes a discharge-port portion including a first discharge-port portion continuing from a discharge port, and a second discharge-port portion communicating the first discharge-port portion with a bubble generation chamber. The second discharge-port portion has an end surface that includes a border portion bordering the first discharge-port portion and is parallel to a main surface of an element substrate. The cross-sectional area of the second discharge-port portion, anywhere from an opening surface facing the bubble generation chamber to an end surface facing the first discharge-port portion, that is parallel to the main surface of the element substrate, is larger than the area of the border portion. The cross section of the opening surface of the second discharge-port portion has a length in a direction perpendicular to an arrangement direction of the discharge ports that is greater than its length in a direction parallel to the arrangement direction.

264 citations

Patent
27 Jun 1996
TL;DR: In this article, a micromachine is incorporated in a liquid jet recording head to cause recording liquid to flow compulsorily in order to remove accumulated bubbles in the liquid paths for maintaining good performance of the recording head at all times.
Abstract: A micromachine comprises at least one heat generating unit arranged on the surface of a substrate, a housing for retaining liquid having a liquid retaining portion along the heat generating unit, and a rotator rotatively supported in the liquid retaining portion of the housing for retaining liquid. This rotator is structured to rotate by way of the boiling of liquid in the liquid retaining portion by heat generated by the heat generating unit. The micromachine, such a micropump or a micromotor, is incorporated in a liquid jet recording head to cause recording liquid to flow compulsorily in order to remove accumulated bubbles in the liquid paths for maintaining good performance of the liquid jet recording head at all times.

245 citations