Patents by Inventor Tatsuo Nanjo
Tatsuo Nanjo 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: 8646887Abstract: The liquid cartridge includes a housing configured to accommodate the liquid container for storing liquid, a groove portion formed on an outer surface of the housing, a liquid lead-out opening, formed on a bottom surface of the groove portion communicating with the liquid container and configured such that the liquid lead-out path for guiding the liquid inside the liquid container to the outside is connected to or disconnected from the liquid lead-out path, a flow path extending toward the inside of the housing from an end of the groove portion in a liquid dripping direction, and a liquid absorbing member provided at an end opposite to the groove portion of the flow path.Type: GrantFiled: May 16, 2011Date of Patent: February 11, 2014Assignee: Canon Kabushiki KaishaInventors: Hideki Ogura, Yasuo Kotaki, Tatsuo Nanjo, Takatoshi Kitagawa, Keisuke Matsuo, Norihiro Ikebe, Eiichiro Shimizu
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Publication number: 20120300003Abstract: The invention is to prevent positional deviation of a sealing valve, improve bubble releasability during atmosphere introduction, and stably supply ink to a recording head. The configuration is provided with an opening 270 on an upper portion of a cylindrical regulating body 165 of a joint base 140 in a state where an ink tank 100 is mounted on a connection unit 10 of a printer.Type: ApplicationFiled: February 16, 2011Publication date: November 29, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hitoshi Takada, Yasuo Kotaki, Koichi Kubo, Hiroki Hayashi, Tatsuo Nanjo, Takeho Miyashita
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Patent number: 8205974Abstract: An ink tank with a high volume efficiency and a printing apparatus which are capable of completely using up ink stored in the ink tank. A meniscus holding force (Pm1) of a non-compressed portion (22b) of an ink guide member (22) is set higher than an initial ink-storage-portion negative pressure (P1), and lower than a used-up ink-storage-portion negative pressure (P2). In addition, a meniscus holding force (Pm2) caused under compression is set stronger than the used-up ink-storage-portion negative pressure (P2), and weaker than a meniscus holding force (Phf) of a head filter (50).Type: GrantFiled: October 10, 2008Date of Patent: June 26, 2012Assignee: Canon Kabushiki KaishaInventors: Hideki Ogura, Yasuo Kotaki, Tetsuya Ohashi, Hitoshi Takada, Koichi Kubo, Ryoji Inoue, Tatsuo Nanjo
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Patent number: 8167416Abstract: A liquid container includes a housing having a supply port leading out liquid contained in the housing, a spring member configured to generate a negative pressure, a flexible member joined to the housing to form a liquid chamber, a plate member disposed between the flexible film and the spring member, a lid member configured to cover the flexible member and secured to the housing, and a rib member movably disposed in a space surrounded by the lid member and the flexible member and configured to regulate the shape of the flexible member and the position of the plate member.Type: GrantFiled: January 29, 2009Date of Patent: May 1, 2012Assignee: Canon Kabushiki KaishaInventors: Tetsuya Ohashi, Yasuo Kotaki, Koichi Kubo, Tatsuo Nanjo
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Publication number: 20110285797Abstract: The liquid cartridge includes a housing configured to accommodate the liquid container for storing liquid, a groove portion formed on an outer surface of the housing, a liquid lead-out opening, formed on a bottom surface of the groove portion communicating with the liquid container and configured such that the liquid lead-out path for guiding the liquid inside the liquid container to the outside is connected to or disconnected from the liquid lead-out path, a flow path extending toward the inside of the housing from an end of the groove portion in a liquid dripping direction, and a liquid absorbing member provided at an end opposite to the groove portion of the flow path.Type: ApplicationFiled: May 16, 2011Publication date: November 24, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Hideki Ogura, Yasuo Kotaki, Tatsuo Nanjo, Takatoshi Kitagawa, Keisuke Matsuo, Norihiro Ikebe, Eiichiro Shimizu
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Patent number: 8047641Abstract: This invention provides a highly reliable liquid container without degrading a liquid accommodation efficiency or increasing a substantial cost. When the liquid container is impacted, the liquid container can protect against damage the flexible film that forms the liquid accommodation chamber. The recessed portion is provided on the inner surface of the cover member facing the plate material. Provided at the opening of the recessed portion is the shock absorbing sheet that elastically deforms into the recessed portion when the plate member is impacted.Type: GrantFiled: December 30, 2008Date of Patent: November 1, 2011Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Yasuo Kotaki, Tetsuya Ohashi, Koichi Kubo
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Patent number: 7992983Abstract: A liquid container is provided with an atmospheric air communicating port communicated with atmospheric air in an upper portion thereof, and a liquid supply port for supplying ink contained in the liquid container to a recording head in a lower portion thereof. A negative pressure producing member for retaining ink and imparting a negative pressure to the recording head is contained in the liquid container. On an upper wall in the liquid container on which the atmospheric air communicating port is provided, a plurality of ribs are integrally formed to protrude to the inside of the liquid container. A space portion is formed between the upper wall of the liquid container on which the ribs are disposed and an upper surface of the negative pressure producing member. A capillary channel for generating a capillary force is provided on the upper wall and side walls of the liquid container which form the space portion.Type: GrantFiled: March 6, 2008Date of Patent: August 9, 2011Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Wataru Takahashi, Hiroki Hayashi, Yasuo Kotaki
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Publication number: 20110096128Abstract: An ink tank with a high volume efficiency and a printing apparatus which are capable of completely using up ink stored in the ink tank. A meniscus holding force (Pm1) of a non-compressed portion (22b) of an ink guide member (22) is set higher than an initial ink-storage-portion negative pressure (P1), and lower than a used-up ink-storage-portion negative pressure (P2). In addition, a meniscus holding force (Pm2) caused under compression is set stronger than the used-up ink-storage-portion negative pressure (P2), and weaker than a meniscus holding force (Phf) of a head filter (50).Type: ApplicationFiled: October 10, 2008Publication date: April 28, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Hideki Ogura, Yasuo Kotaki, Tetsuya Ohashi, Hitoshi Takada, Koichi Kubo, Ryoji Inoue, Tatsuo Nanjo
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Patent number: 7686438Abstract: A liquid tank includes a liquid chamber for holding liquid and an absorption chamber containing an absorber for absorbing and holding the liquid. The liquid chamber and the absorption chamber are separated by a partition. The partition has a communication part allowing communication between the liquid chamber and the absorption chamber. The liquid chamber is substantially sealed except at the communication part. The absorption chamber has a liquid outlet and an air inlet. A liquid-guiding path is disposed on the bottom surface of the liquid tank. The liquid-guiding path extends from the communication part to a point a predetermined distance away from the liquid outlet.Type: GrantFiled: December 20, 2007Date of Patent: March 30, 2010Assignee: Canon Kabushiki KaishaInventors: Masashi Ogawa, Wataru Takahashi, Tatsuo Nanjo, Yasuo Kotaki
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Publication number: 20090189963Abstract: A liquid container includes a housing having a supply port leading out liquid contained in the housing, a spring member configured to generate a negative pressure, a flexible member joined to the housing to form a liquid chamber, a plate member disposed between the flexible film and the spring member, a lid member configured to cover the flexible member and secured to the housing, and a rib member movably disposed in a space surrounded by the lid member and the flexible member and configured to regulate the shape of the flexible member and the position of the plate member.Type: ApplicationFiled: January 29, 2009Publication date: July 30, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Ohashi, Yasuo Kotaki, Koichi Kubo, Tatsuo Nanjo
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Publication number: 20090179979Abstract: This invention provides a highly reliable liquid container without degrading a liquid accommodation efficiency or increasing a substantial cost. When the liquid container is impacted, the liquid container can protect against damage the flexible film that forms the liquid accommodation chamber. The recessed portion is provided on the inner surface of the cover member facing the plate material. Provided at the opening of the recessed portion is the shock absorbing sheet that elastically deforms into the recessed portion when the plate member is impacted.Type: ApplicationFiled: December 30, 2008Publication date: July 16, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Tatsuo Nanjo, Yasuo Kotaki, Tetsuya Ohashi, Koichi Kubo
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Patent number: 7552837Abstract: A packaging structure for a liquid container including a liquid containing portion accommodating liquid, a liquid supply portion for supplying the liquid to an outside and an air vent for fluid communication with an ambience, the packing structure includes a covering member for covering and sealing the liquid supply portion and the air vent; the covering member including; an air vent sealing portion for sealing the air vent and a liquid supply portion sealing portion for sealing the liquid supply portion, and a connecting region for covering a connecting side of the liquid container which connects the air vent sealing portion and the liquid supply portion sealing portion, wherein the liquid supply portion sealing portion effects non-adhering sealing for the liquid supply portion, and the connecting region provides a resistance against unsealing of the liquid supply portion.Type: GrantFiled: March 17, 2003Date of Patent: June 30, 2009Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Masanori Takenouchi, Hajime Yamamoto, Eiichiro Shimizu
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Publication number: 20080239037Abstract: An ink tank includes an ink containing chamber configured to directly contain ink, a supply port configured to supply the ink from the ink containing chamber to a recording head, a capillary member disposed in the supply port to hold the ink, and a sealing member configured to cover the supply port. An air volume (V) of a space constituted by the capillary member and the sealing member, an ink volume (Vi) held by the capillary member, and a maximum volume (Vexp) when air expands in the space accompanying environmental fluctuation of the ink tank, satisfy Vi?Vexp?V.Type: ApplicationFiled: March 27, 2008Publication date: October 2, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Ryoji Inoue, Yasuo Kotaki, Tetsuya Ohashi, Hitoshi Takada, Hideki Ogura, Kouichi Kubo, Tatsuo Nanjo
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Patent number: 7396117Abstract: A side rib provided on an inner wall of a housing creates space, which extends to reach an air hole, between a second ink retainer and the inner wall of the housing. A contact area where a first ink retainer and the second ink retainer are in contact with each other is provided with grooves that communicate with the space provided on the inner wall of the housing.Type: GrantFiled: December 20, 2005Date of Patent: July 8, 2008Assignee: Canon Kabushiki KaishaInventors: Hiroki Hayashi, Tatsuo Nanjo, Wataru Takahashi
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Publication number: 20080158314Abstract: A liquid container is provided with an atmospheric air communicating port communicated with atmospheric air in an upper portion thereof, and a liquid supply port for supplying ink contained in the liquid container to a recording head in a lower portion thereof. A negative pressure producing member for retaining ink and imparting a negative pressure to the recording head is contained in the liquid container. On an upper wall in the liquid container on which the atmospheric air communicating port is provided, a plurality of ribs are integrally formed to protrude to the inside of the liquid container. A space portion is formed between the upper wall of the liquid container on which the ribs are disposed and an upper surface of the negative pressure producing member. A capillary channel for generating a capillary force is provided on the upper wall and side walls of the liquid container which form the space portion.Type: ApplicationFiled: March 6, 2008Publication date: July 3, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Tatsuo Nanjo, Wataru Takahashi, Hiroki Hayashi, Yasuo Kotaki
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Patent number: 7387379Abstract: A liquid container is provided with an atmospheric air communicating port communicated with atmospheric air in an upper portion thereof, and a liquid supply port for supplying ink contained in the liquid container to a recording head in a lower portion thereof. A negative pressure producing member for retaining ink and imparting a negative pressure to the recording head is contained in the liquid container. On an upper wall in the liquid container on which the atmospheric air communicating port is provided, a plurality of ribs are integrally formed to protrude to the inside of the liquid container. A space portion is formed between the upper wall of the liquid container on which the ribs are disposed and an upper surface of the negative pressure producing member. A capillary channel for generating a capillary force is provided on the upper wall and side walls of the liquid container which form the space portion.Type: GrantFiled: November 23, 2005Date of Patent: June 17, 2008Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Wataru Takahashi, Hiroki Hayashi, Yasuo Kotaki
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Patent number: 7380921Abstract: A liquid-feeding system efficiently transferring liquid from a liquid storage to a liquid chamber and efficiently transferring gas from the liquid chamber to the liquid storage. The liquid-feeding system includes a liquid-using unit, the liquid storage, the liquid chamber in communication with the liquid-using unit, a plurality of communication paths facilitating communication between the liquid chamber and the liquid storage, the liquid chamber having a substantially enclosed space except where the space communicates with the plurality of communication paths and with the liquid-using unit, a pressure regulator disposed in the liquid storage and regulating the internal pressure of the liquid storage, and means for changing an internal pressure of the liquid chamber relatively higher than an internal pressure of the liquid storage.Type: GrantFiled: September 24, 2004Date of Patent: June 3, 2008Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Ryoichi Matsumoto, Ryoji Inoue, Hideki Ogura, Satoshi Oikawa, Ken Hosaka
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Patent number: D611531Type: GrantFiled: June 24, 2008Date of Patent: March 9, 2010Assignee: Canon Kabushiki KaishaInventors: Nobuyuki Hatasa, Tatsuo Nanjo, Masaaki Ishibashi, Yasunori Senshiki
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Patent number: D611532Type: GrantFiled: June 24, 2008Date of Patent: March 9, 2010Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Naoki Tashiro, Yasunori Senshiki, Yasuo Kotaki, Tetsuya Ohashi, Koichi Kubo
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Patent number: D656183Type: GrantFiled: November 17, 2010Date of Patent: March 20, 2012Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nanjo, Kenta Udagawa, Eiichiro Shimizu, Hideki Ogura, Hiroki Hayashi, Masataka Isomoto, Yasunori Senshiki