Patents by Inventor Tetsuo Furukawa
Tetsuo Furukawa 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: 11543768Abstract: An image forming apparatus includes a cartridge provided with a memory. The apparatus main body includes a frame, a movable electric contact unit including an electric contact portion contacting with the memory, and a holding member holding the electric contact portion and including an urging member urging the electric contact unit toward the memory in a mounted state of the cartridge, and a positioning portion positioning the electric contact unit in an unmounted state of the cartridge.Type: GrantFiled: June 7, 2021Date of Patent: January 3, 2023Assignee: Canon Kabushiki KaishaInventors: Tetsuo Furukawa, Ryota Shibuya
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Publication number: 20210389719Abstract: An image forming apparatus includes a cartridge provided with a memory. The apparatus main body includes a frame, a movable electric contact unit including an electric contact portion contacting with the memory, and a holding member holding the electric contact portion and including an urging member urging the electric contact unit toward the memory in a mounted state of the cartridge, and a positioning portion positioning the electric contact unit in an unmounted state of the cartridge.Type: ApplicationFiled: June 7, 2021Publication date: December 16, 2021Inventors: Tetsuo Furukawa, Ryota Shibuya
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Patent number: 10996614Abstract: The present invention is a part positioning mechanism configured to insert a protruding portion constituting a part of a second sheet metal part into an opening formed in a first sheet metal part. The first contact portion which contacts the first convex portion of the first sheet metal and the second contact portion which contacts the second convex portion of the first sheet metal are disposed to be shifted in an orthogonal direction which intersects orthogonally with the plate thickness direction and an insertion direction for the protruding portion. The edge of the opening of the first sheet metal part has a first edge which is distant from the protruding portion increases from the first convex portion to the second convex portion, and a second edge which is distant from the protruding portion increases from the second convex portion to the first convex portion.Type: GrantFiled: July 5, 2018Date of Patent: May 4, 2021Assignee: Canon Kabushiki KaishaInventors: Tatsuo Nishiyama, Tetsuo Furukawa, Shigeo Murayama, Kenji Ninomiya
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Publication number: 20200183320Abstract: The present invention is a part positioning mechanism configured to insert a protruding portion constituting a part of a second sheet metal part into an opening formed in a first sheet metal part. The first contact portion which contacts the first convex portion of the first sheet metal and the second contact portion which contacts the second convex portion of the first sheet metal are disposed to be shifted in an orthogonal direction which intersects orthogonally with the plate thickness direction and an insertion direction for the protruding portion. The edge of the opening of the first sheet metal part has a first edge which is distant from the protruding portion increases from the first convex portion to the second convex portion, and a second edge which is distant from the protruding portion increases from the second convex portion to the first convex portion.Type: ApplicationFiled: July 5, 2018Publication date: June 11, 2020Inventors: Tatsuo Nishiyama, Tetsuo Furukawa, Shigeo Murayama, Kenji Ninomiya
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Patent number: 10543999Abstract: A sheet conveyance apparatus includes a conveyance portion, a reverse conveyance portion, and first and second conveyance regulating portions. An engagement portion contacts the first conveyance regulating portion so that it pivots in a first pivoting direction in an interlocked manner with the second conveyance regulating portion. The first and second conveyance regulating portions are arranged between the conveyance portion and the reverse conveyance portion in a first sheet conveyance direction, and an urging member urges the first and second conveyance regulating portions toward a position where the first and second conveyance regulating portions project to a first conveyance path through which the sheet conveyed from the conveyance portion toward the reverse conveyance portion is conveyed.Type: GrantFiled: August 27, 2018Date of Patent: January 28, 2020Assignee: Canon Kabushiki KaishaInventors: Tetsuo Furukawa, Tatsuo Nishiyama, Shigeo Murayama, Kenji Ninomiya
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Publication number: 20190071271Abstract: A sheet conveyance apparatus includes first and second conveyance regulating portions which are respectively supported pivotably at different positions in a width direction, and an engagement portion provided on one of the first and second conveyance regulating portions and configured to be engaged with the other of the first and second conveyance regulating portions. In a state where a sheet whose length in the width direction is a first width is conveyed through a conveyance path, the sheet abuts the first conveyance regulating portion and pivots only the first conveyance regulating portion. In a state where a sheet whose length in the width direction is a second width that is greater than the first width is conveyed through the conveyance path, the sheet abuts the second conveyance regulating portion and pivots the second conveyance regulating portion while also pivoting the first conveyance regulating portion through the engagement portion.Type: ApplicationFiled: August 27, 2018Publication date: March 7, 2019Inventors: Tetsuo Furukawa, Tatsuo Nishiyama, Shigeo Murayama, Kenji Ninomiya
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Patent number: 10067466Abstract: An image forming apparatus including: a plurality of cartridges; a belt configured to abut against the photosensitive drums of the plurality of cartridges; a frame configured to axially support a plurality of rollers around which the belt is extended; and a movable member configured to be movable while supporting the plurality of cartridges, the movable member being movable between a first position in which the plurality of cartridges are in an main body of the apparatus and a second position in which the plurality of cartridges are drawn out from the main body of the apparatus, wherein the frame is provided with a plurality of positioning portions configured to allow abutment of the plurality of cartridges and determine the positions of the plurality of cartridges in the main body of the apparatus.Type: GrantFiled: May 1, 2017Date of Patent: September 4, 2018Assignee: Canon Kabushiki KaishaInventors: Yasuhiro Fukase, Takeo Kawanami, Tetsuo Furukawa
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Publication number: 20170235276Abstract: An image forming apparatus including: a plurality of cartridges; a belt configured to abut against the photosensitive drums of the plurality of cartridges; a frame configured to axially support a plurality of rollers around which the belt is extended; and a movable member configured to be movable while supporting the plurality of cartridges, the movable member being movable between a first position in which the plurality of cartridges are in an main body of the apparatus and a second position in which the plurality of cartridges are drawn out from the main body of the apparatus, wherein the frame is provided with a plurality of positioning portions configured to allow abutment of the plurality of cartridges and determine the positions of the plurality of cartridges in the main body of the apparatus.Type: ApplicationFiled: May 1, 2017Publication date: August 17, 2017Inventors: Yasuhiro Fukase, Takeo Kawanami, Tetsuo Furukawa
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Patent number: 9529318Abstract: An image forming apparatus includes an opening, an openable member, and a movable member for supporting cartridges in a state in which the cartridges are arranged in an arranging direction, movable in the arranging direction while passing through the opening between an inside position and an outside position in a direction crossing the arranging direction and a longitudinal direction. When the movable member is positioned at the inside position, adjacent two cartridges of the cartridges are in an overlapping state as seen in a direction perpendicular to the arranging direction and the longitudinal direction. When the movable member is moved from the inside position to the outside position and then one of the adjacent two cartridges is dismounted from the movable member, the one of the adjacent two cartridges is moved relative to the movable member so as to be prevented from interfering with the other cartridge.Type: GrantFiled: August 8, 2014Date of Patent: December 27, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Masaki Sato, Isao Matsuoka, Osamu Sasaoka, Tetsuo Furukawa
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Patent number: 9529300Abstract: In a developing device, a rotation shaft is provided with a developer feeding member, a cleaning member, and a receiving portion. The receiving portion is provided downstream of the developer feeding member and upstream of a light transmitting member, provided to a wall surface of a developer accommodating chamber of the developing device, with respect to a rotational direction of the rotation shaft when the cleaning member has passed through the light transmitting member.Type: GrantFiled: September 14, 2015Date of Patent: December 27, 2016Assignee: Canon Kabushiki KaishaInventors: Hideki Kakuta, Tetsuo Furukawa
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Publication number: 20160070201Abstract: In a developing device, a rotation shaft is provided with a developer feeding member, a cleaning member, and a receiving portion. The receiving portion is provided downstream of the developer feeding member and upstream of a light transmitting member, provided to a wall surface of a developer accommodating chamber of the developing device, with respect to a rotational direction of the rotation shaft when the cleaning member has passed through the light transmitting member.Type: ApplicationFiled: September 14, 2015Publication date: March 10, 2016Inventors: Hideki Kakuta, Tetsuo Furukawa
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Patent number: 9158234Abstract: In a developing device, a rotation shaft is provided with a developer feeding member, a cleaning member, and a receiving portion. The receiving portion is provided downstream of the developer feeding member and upstream of a light transmitting member, provided to a wall surface of a developer accommodating chamber of the developing device, with respect to a rotational direction of the rotation shaft when the cleaning member has passed through the light transmitting member.Type: GrantFiled: January 15, 2013Date of Patent: October 13, 2015Assignee: Canon Kabushiki KaishaInventors: Hideki Kakuta, Tetsuo Furukawa
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Patent number: 9134695Abstract: An image forming apparatus for forming an image on a recording material includes a detachably mountable cartridge and a pressing member movable between a pressing position for applying a pressing force to the cartridge to fix the cartridge to an image forming position and a non-pressing position. In addition, a limiting member moves between a limiting position and a non-limiting position. In the limiting position, the limiting member is close to the cartridge placed in the image forming position, with a gap therebetween to limit movement of the cartridge if the cartridge moves against the pressing force of the pressing member. The limiting member permits the cartridge to move from the image forming position to a retracted position, by moving from the limiting position to the non-limiting position.Type: GrantFiled: September 3, 2013Date of Patent: September 15, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Tetsuo Furukawa, Kenji Watanabe, Toshiharu Kawai
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Publication number: 20150055975Abstract: An image forming apparatus includes: an opening; an openable member; and a movable member, supporting cartridges in a state in which the cartridges are arranged in an arranging direction, movable in the arranging direction while passing through the opening between an inside position and an outside position in a direction crossing the arranging direction and a longitudinal direction. When the movable member is positioned at the inside position, adjacent two cartridges of the cartridges are in an overlapping state as seen in a direction perpendicular to the arranging direction and the longitudinal direction. When the movable member is moved from the inside position to the outside position and then one of the adjacent two cartridges is dismounted from the movable member, the one of the adjacent two cartridges is moved relative to the movable member so as to be prevented from interfering with the other cartridge.Type: ApplicationFiled: August 8, 2014Publication date: February 26, 2015Inventors: Masaki Sato, Isao Matsuoka, Osamu Sasaoka, Tetsuo Furukawa
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Publication number: 20140147167Abstract: An image forming apparatus including: a plurality of cartridges; a belt configured to abut against the photosensitive drums of the plurality of cartridges; a frame configured to axially support a plurality of rollers around which the belt is extended; and a movable member configured to be movable while supporting the plurality of cartridges, the movable member being movable between a first position in which the plurality of cartridges are in an main body of the apparatus and a second position in which the plurality of cartridges are drawn out from the main body of the apparatus, wherein the frame is provided with a plurality of positioning portions configured to allow abutment of the plurality of cartridges and determine the positions of the plurality of cartridges in the main body of the apparatus.Type: ApplicationFiled: November 26, 2013Publication date: May 29, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Yasuhiro Fukase, Takeo Kawanami, Tetsuo Furukawa
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Publication number: 20140064782Abstract: An image forming apparatus includes an opening; an door; a pressing member movable between a pressing position for fixing the cartridge to an image forming position, and a non-pressing position; an interrelating member for interrelations such that (i) with movement from the close position to the open position, the pressing member moves from the pressing position to the non-pressing position, and the cartridge moves from the image forming position to a retracted position, and (ii) with the inverse movement, the cartridge and the pressing member move inversely; and a limiter movable between a position for preventing the cartridge from moving against the pressing force, and a position for permitting the cartridge to move from the image forming position to the retracted position.Type: ApplicationFiled: September 3, 2013Publication date: March 6, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuo Furukawa, Kenji Watanabe, Toshiharu Kawai
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Patent number: 8380105Abstract: In a developing device, a rotation shaft is provided with a developer feeding member, a cleaning member, and a receiving portion. The receiving portion is provided downstream of the developer feeding member and upstream of a light transmitting member, provided to a wall surface of a developer accommodating chamber of the developing device, with respect to a rotational direction of the rotation shaft when the cleaning member has passed through the light transmitting member.Type: GrantFiled: May 25, 2012Date of Patent: February 19, 2013Assignee: Canon Kabushiki KaishaInventors: Hideki Kakuta, Tetsuo Furukawa
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Publication number: 20120251159Abstract: In a developing device, a rotation shaft is provided with a developer feeding member, a cleaning member, and a receiving portion. The receiving portion is provided downstream of the developer feeding member and upstream of a light transmitting member, provided to a wall surface of a developer accommodating chamber of the developing device, with respect to a rotational direction of the rotation shaft when the cleaning member has passed through the light transmitting member.Type: ApplicationFiled: May 25, 2012Publication date: October 4, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hideki Kakuta, Tetsuo Furukawa
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Patent number: 8218999Abstract: A winding member winds a seal member that seals an opening of a developer storage unit. The winding member includes a first holding portion having a first engaging portion, and a second holding portion having a second engaging portion to be engaged with the first engaging portion, configured to hold the sealing member between the first and second holding portions, wherein an end of the first holding portion and an end of the second holding portion are connected, so that the first holding portion and the second holding portion are relatively movable, and wherein the first engaging portion is engaged with the second engaging portion while the sealing member is held between the first holding portion and the second holding portion.Type: GrantFiled: November 29, 2011Date of Patent: July 10, 2012Assignee: Canon Kabushiki KaishaInventors: Tetsuo Furukawa, Hideki Nagae
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Patent number: 8208838Abstract: In a developing device, a rotation shaft is provided with a developer feeding member, a cleaning member, and a receiving portion. The receiving portion is provided downstream of the developer feeding member and upstream of a light transmitting member, provided to a wall surface of a developer accommodating chamber of the developing device, with respect to a rotational direction of the rotation shaft when the cleaning member has passed through the light transmitting member.Type: GrantFiled: May 19, 2009Date of Patent: June 26, 2012Assignee: Canon Kabushiki KaishaInventors: Hideki Kakuta, Tetsuo Furukawa