Patents by Inventor Masaaki Izumida
Masaaki Izumida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6231166Abstract: An ink jet head having a plurality of heat generating resistive elements arranged in an array for discharging ink, includes a base board having said heat generating resistive elements and a plurality of layers for electrical insulation or protection laminated on a substrate and liquid paths on said base board corresponding to said heat generating resistive elements. At least a part of said layers is removed between said heat generating resistive elements adjacent to each other.Type: GrantFiled: February 27, 1996Date of Patent: May 15, 2001Assignee: Canon Kabushiki KaishaInventors: Jun Kawai, Hiroshi Sugitani, Masami Kasamoto, Tsuyoshi Orikasa, Hiroyuki Ishinaga, Teruo Arashima, Masaaki Izumida
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Patent number: 6224195Abstract: A recording head records data by correcting a variation among recording elements without significantly increasing a size of a substrate of the recording head. The recording head includes a plurality of heat generating elements and a circuit for energizing the heat generating elements in accordance with record data to record data. Selection information for selecting one of a plurality of pre-heat pulse signals is non-volatilly stored in a ROM and one of the pre-heat signal pulses applied to an input terminal is selected in accordance with the selection information stored in the ROM to pre-heat the heat generating elements.Type: GrantFiled: January 23, 1996Date of Patent: May 1, 2001Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Maru, Masami Kasamoto, Fumio Murooka, Yoshiyuki Imanaka, Masaaki Izumida
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Patent number: 6116714Abstract: A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit.Type: GrantFiled: March 2, 1995Date of Patent: September 12, 2000Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Imanaka, Masaki Inaba, Masami Ikeda, Yutaka Koizumi, Tsuyoshi Orikasa, Tatsuo Furukawa, Toshio Kashino, Hideaki Kishida, Seiichiro Karita, Shuji Koyama, Haruhiko Terai, Kimiyuki Hayasaki, Shuichi Katao, Akira Goto, Kouichi Omata, Hiroyuki Maru, Masaaki Izumida, Yuji Kamiyama, Takayuki Ono
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Patent number: 6113223Abstract: 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.Type: GrantFiled: February 18, 1997Date of Patent: September 5, 2000Assignee: Canon Kabushiki KaishaInventors: Shigeaki Tanaka, Nobuyuki Kuwabara, Akira Goto, Takashi Watanabe, Kunihiko Maeoka, Masaaki Izumida, Koichi Sato, Tsuguhiro Fukuda, Hiroshi Sugitani, Yoshifumi Hattori, Masami Ikeda, Asao Saito, Kazuaki Masuda, Akio Saito, Tsuyoshi Orikasa, Takashi Ohba, Hiroshi Nakagomi, Teruo Arashima, Jun Kawai, Tsutomu Abe, Toshio Kashino, Makiko Kimura, Hideo Saikawa, Seiichiro Karita
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Patent number: 6003973Abstract: An ink jet head includes ink ejection outlet for ejecting ink, a plurality of heat generating resistors for generating thermal energy contributable to ejecting the ink, and ink flow path comprising the plurality of the heat generating resistors and being in fluid communication with the ejection outlet, the heat generating resistors generating the thermal energy upon receiving a driving signal, so that a bubble is generated in the ink within the ink flow path to eject the ink through the ink ejection outlet; wherein the plurality of the heat generating resistors are arranged in parallel, relative to the ink ejecting direction, in the ink flow path, and the distances from the heat generating centers of the heat generating resistors to the ejection outlet are different.Type: GrantFiled: June 6, 1996Date of Patent: December 21, 1999Assignee: Canon Kabushiki KaishaInventors: Yuji Kamiyama, Hiroyuki Ishinaga, Yoshiyuki Imanaka, Masaaki Izumida
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Patent number: 5992981Abstract: An ink jet head includes a heater board having a substrate on which a plurality of energy generating elements for generating energy utilized to discharge ink are provided, and a wall member joined to the heater board. The wall member has a plurality of flow passage walls which partially define flow passages, and the energy generated by the energy generating element acts through the flow passage so as to act on the ink to discharge the ink. The flow passages are fully defined when the heater board is joined to the wall member. A recessed portion provided in the heater board of the ink jet head is positioned between adjoining energy generating elements. The recessed portion has a bottom surface located at a position which is lower than a position for a heat acting surface of the heater board along which heat is transmitted to the ink. The flow passage walls of the wall member abut the heater board at the bottom surface.Type: GrantFiled: July 27, 1994Date of Patent: November 30, 1999Assignee: Canon Kabushiki KaishaInventors: Hiroshi Sugitani, Masami Kasamoto, Tsuyoshi Orikasa, Masashi Miyagawa, Jun Kawai, Teruo Arashima, Masaaki Izumida
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Patent number: 5943069Abstract: A driving voltage of a discharging heater in an ink jet recording head is set according to property of the individual recording head. More specifically, sub-heaters are formed on a board on which discharging heaters are formed, by a same process as that for the discharging heaters. Resistance values of the sub-heaters are read so that the driving voltage of the discharging heaters can be set on the basis of the read resistance values.Type: GrantFiled: July 3, 1996Date of Patent: August 24, 1999Assignee: Canon Kabushiki KaishaInventors: Yuji Kamiyama, Masaaki Izumida
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Patent number: 5943070Abstract: This invention has as its object to provide a substrate for an ink jet recording head, which is compact and can realize stable recording with high reliability, a recording head using the substrate, a recording apparatus mounting the recording head, and a method of driving the recording head.There are disclosed a substrate for a thermal recording head, having a plurality of heating resistor elements, a plurality of wiring electrodes for supplying driving signals to the heating resistor elements, a function element, electrically connected to the heating resistor elements, for selectively driving the plurality of heating resistor elements, and a measurement resistor element which is electrically independent from the heating resistor elements and the function element, and has a resistance value larger than that of each heating resistor element, an ink jet head, a head cartridge, and a recording apparatus utilizing the substrate, and a method of driving a recording head using a measurement resistor.Type: GrantFiled: September 2, 1994Date of Patent: August 24, 1999Assignee: Canon Kabushiki KaishaInventors: Yuji Kamiyama, Fumio Murooka, Tatsuo Furukawa, Shuichi Katao, Yoshiyuki Imanaka, Hiroyuki Maru, Masaaki Izumida
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Patent number: 5907337Abstract: An ink jet recording method using a number of ejection outlets for ejecting ink includes grouping a number of ejection outlets into a plurality of groups such that ejection regions are partly overlapped; and supplying driving signals in such an order that ejection regions of groups of ejection outlets are partly overlapped.Type: GrantFiled: June 23, 1994Date of Patent: May 25, 1999Assignee: Canon Kabushiki KaishaInventors: Hiroshi Tajika, Masami Ikeda, Hiromitsu Hirabayashi, Jiro Moriyama, Toshio Kashino, Noribumi Koitabashi, Yuji Akiyama, Takeshi Okazaki, Masaaki Izumida
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Patent number: 5896147Abstract: A liquid jet element substrate having a plurality of ejection energy generating elements for generating ejection energy for ejecting liquid, arranged in an array in a direction at predetermined intervals, wherein an interval between the ejection energy generating element at an end, in the direction of the array, and the ejection energy generating element adjacent thereto is smaller than an interval between adjacent central ejection energy generating elements.Type: GrantFiled: October 23, 1995Date of Patent: April 20, 1999Assignee: Canon Kabushiki KaishaInventors: Toshihiro Mori, Masami Ikeda, Masami Kasamoto, Yoshiyuki Imanaka, Teruo Ozaki, Masaaki Izumida
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Patent number: 5880762Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.Type: GrantFiled: October 15, 1997Date of Patent: March 9, 1999Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ishinaga, Kazuaki Masuda, Junji Shimoda, Masami Kasamoto, Fumio Murooka, Tatsuo Furukawa, Jun Kawai, Hiroyuki Maru, Teruo Arashima, Masaaki Izumida, Yoshinori Misumi, Yuji Kamiyama
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Patent number: 5877784Abstract: A downsized, low-cost, high-density printhead, a printing apparatus and a printing method using the printhead can be achieved. If the number of electrothermal transducers is N, a shift register is capable of storing print information corresponding to N/8 electrothermal transducers. First, print information corresponding to the capacity of the shift register is transferred to the printhead. Then, the shifting function of the shift register is stopped to hold the print information. A 3-bit selection signal is inputted from an input terminal as the print information information. The selection signal is sent to a time-divisional logical circuit, then N/8 electrothermal transducers are selected, and a printing operation based on the input data is performed. This operation is repeated eight times, to complete printing by all the N electrothermal transducers.Type: GrantFiled: June 30, 1995Date of Patent: March 2, 1999Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Maru, Junji Shimoda, Fumio Murooka, Tatsuo Furukawa, Hiroyuki Ishinaga, Masaaki Izumida, Yoshinori Misumi
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Patent number: 5841448Abstract: There is disclosed an ink-jet head for performing recording by discharging an ink, including a discharge port for discharging the ink, and an ink channel which communicates with the discharge port and is provided with a discharge energy generating element for discharging the ink. An optical element is arranged at a position, corresponding to the ink channel, of the ink-jet head. There are also disclosed an ink-jet apparatus using the ink-jet head and a substrate for the ink-jet head.Type: GrantFiled: December 28, 1994Date of Patent: November 24, 1998Assignee: Canon Kabushiki KaishiInventors: Jiro Moriyama, Sadayuki Sugama, Hiromitsu Hirabayashi, Hiroshi Tajika, Noribumi Koitabashi, Yuji Akiyama, Yoshiyuki Imanaka, Masaaki Izumida
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Patent number: 5841455Abstract: An ink container includes an ink discharging portion for discharging ink; an air vent; first liquid absorbing material for absorbing the ink therein; and a second ink absorbing material, disposed between the air vent and the first absorbing material, for absorbing the ink. The first and second absorbing materials at least partly contact each other.Type: GrantFiled: January 6, 1997Date of Patent: November 24, 1998Assignee: Canon Kabushiki KaishaInventors: Shigeaki Tanaka, Masami Ikeda, Naohito Asai, Nobuyuki Kuwabara, Makiko Kimura, Teruo Arashima, Masaaki Izumida
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Patent number: 5801737Abstract: An ink container includes an ink storing portion for storing ink; an ink supplying portion for supplying ink to a recording head portion; an air vent for taking the atmospheric air into the ink container; and a hollow tube, one end of which opens to the atmosphere at the air vent, above the liquid level of the stored ink, and the other end of which opens within the ink container adjacent to the bottom portion of the ink container.Type: GrantFiled: February 10, 1997Date of Patent: September 1, 1998Assignee: Canon Kabushiki KaishaInventors: Yohei Sato, Kazuaki Masuda, Torachika Osada, Masahiko Higuma, Jun Kawai, Masaaki Izumida, Yoichi Taneya, Masaru Iketani
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Patent number: 5754201Abstract: An ink jet head having a plurality of electrothermal transducer elements in one liquid passage is arranged so that the ratio of the areas of two of the plurality of electrothermal transducer elements is smaller than the ratio of the amounts of ink ejected by the two electrothermal transducer elements, thereby stably obtaining the desired amounts of ejected ink and achieving a high gradational effect at a high energy efficiency.Type: GrantFiled: October 18, 1995Date of Patent: May 19, 1998Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ishinaga, Masami Ikeda, Hajime Kaneko, Jun Kawai, Yasutoshi Saito, Masaaki Izumida, Masahiko Tonogaki
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Patent number: 5731828Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.Type: GrantFiled: October 20, 1995Date of Patent: March 24, 1998Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ishinaga, Kazuaki Masuda, Junji Shimoda, Masami Kasamoto, Fumio Murooka, Tatsuo Furukawa, Jun Kawai, Hiroyuki Maru, Teruo Arashima, Masaaki Izumida, Yoshinori Misumi, Yuji Kamiyama
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Patent number: 5623287Abstract: An ink container, as well as a method of making the same, which has ink absorbing material for retaining ink, a casing for holding the ink absorbing material, an ink supply port through which ink is withdrawn from the absorbing material, and an air vent. The air vent and ink supply port are each provided adjacent to different longitudinal halves of the ink absorbing material, and the casing is initially filled with an amount of ink which is larger than the quantity of ink which can be retained by the ink absorbing material. Then, ink adjacent to the air vent is removed to such an extent that the casing contains the quantity of the ink which the ink absorbing material can retain. Thus, ink is retained at a higher density adjacent to the ink supply port than adjacent to the air vent.Type: GrantFiled: May 30, 1995Date of Patent: April 22, 1997Assignee: Canon Kabushiki KaishaInventors: Hideo Saikawa, Seiichiro Karita, Toshio Kashino, Akio Saito, Hiroshi Nakagomi, Teruo Arashima, Makiko Kimura, Hiroshi Sugitani, Yoshifumi Hattori, Masami Ikeda, Masaaki Izumida, Shigeaki Tanaka, Nobuyuki Kuwabara, Asao Saito, Kazuaki Masuda, Tsuyoshi Orikasa
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Patent number: 5621446Abstract: An ink container includes an ink discharging portion for discharging ink; an air vent; first liquid absorbing material for absorbing the ink therein and; a second ink absorbing material, disposed between the air vent and the first absorbing material, for absorbing the ink. The first and second absorbing materials at least partly contacting each other.Type: GrantFiled: January 3, 1995Date of Patent: April 15, 1997Assignee: Canon Kabushiki KaishaInventors: Shigeaki Tanaka, Masami Ikeda, Naohito Asai, Nobuyuki Kuwabara, Makiko Kimura, Teruo Arashima, Masaaki Izumida
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Patent number: 5602576Abstract: A recording head comprises a liquid emission member having an orifice through which an ink is emitted, an electro-thermal converter element for generating a thermal energy which is utilized to emit the ink introduced into the liquid emission member, and a functional element disposed on a same substrate on which the electro-thermal converter element is disposed for driving and controlling the electro-thermal converter element.The functional element includes an NPN bipolar transistor for driving the electrothermal converter element and a CMOS transistor composed of an NMOS transistor and a PMOS transisfor for controlling an operation of the bipolar transistor.The NMOS transistor being formed in a P well diffusion layer in an N.sup.- type epitaxial growth layer which is grown on a surface of a P type semiconductor substrate.The PMOS transistor being formed in an N well diffusion layer in the N.sup.- type epitaxial growth layer which is grown on the surface of the P type semiconductor substrate.Type: GrantFiled: April 15, 1996Date of Patent: February 11, 1997Assignee: Canon Kabushiki KaishaInventors: Fumio Murooka, Junji Shimoda, Tatsuo Furukawa, Hiroyuki Ishinaga, Hiroyuki Maru, Masaaki Izumida, Yoshinori Misumi