Patents by Inventor Takashi Akutsu
Takashi Akutsu 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: 10825711Abstract: The sheet for semiconductor processing of the present invention includes a base, an unevenness-absorbing layer provided on one surface of the base, and a pressure sensitive adhesive layer provided on the unevenness-absorbing layer, wherein the pressure sensitive adhesive layer is composed of an energy ray-curable pressure sensitive adhesive, and a stress at rupture of the pressure sensitive adhesive layer after energy ray curing is 10 MPa or more.Type: GrantFiled: March 28, 2016Date of Patent: November 3, 2020Assignee: LINTEC CORPORATIONInventors: Yasuhiko Kakiuchi, Takashi Akutsu, Sayaka Bandou, Yuichiro Komasu
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Patent number: 10636691Abstract: The semiconductor processing sheet of the present invention is a semiconductor processing sheet including a base material and a pressure sensitive adhesive layer provided on one surface of the base material, wherein the pressure sensitive adhesive layer contains an acrylic polymer (A) having a molecular weight distribution of 3.0 or less and an acrylic polymer (B) having a molecular weight distribution of more than 3.0; and a gel fraction of the pressure sensitive adhesive layer is 50 to 70%, and a number average molecular weight of a sol content thereof is 60,000 or more.Type: GrantFiled: March 22, 2017Date of Patent: April 28, 2020Assignee: LINTEC CorporationInventors: Takashi Akutsu, Takuo Nishida
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Patent number: 10289058Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.Type: GrantFiled: July 10, 2018Date of Patent: May 14, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
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Publication number: 20180321631Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.Type: ApplicationFiled: July 10, 2018Publication date: November 8, 2018Inventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
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Publication number: 20180286736Abstract: The sheet for semiconductor processing of the present invention includes a base, an unevenness-absorbing layer provided on one surface of the base, and a pressure sensitive adhesive layer provided on the unevenness-absorbing layer, wherein the pressure sensitive adhesive layer is composed of an energy ray-curable pressure sensitive adhesive, and a stress at rupture of the pressure sensitive adhesive layer after energy ray curing is 10 MPa or more.Type: ApplicationFiled: March 28, 2016Publication date: October 4, 2018Applicant: LINTEC CORPORATIONInventors: Yasuhiko KAKIUCHI, Takashi AKUTSU, Sayaka BANDOU, Yuichiro KOMASU
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Patent number: 10061260Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.Type: GrantFiled: January 19, 2017Date of Patent: August 28, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
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Publication number: 20170278739Abstract: The semiconductor processing sheet of the present invention is a semiconductor processing sheet including a base material and a pressure sensitive adhesive layer provided on one surface of the base material, wherein the pressure sensitive adhesive layer contains an acrylic polymer (A) having a molecular weight distribution of 3.0 or less and an acrylic polymer (B) having a molecular weight distribution of more than 3.0; and a gel fraction of the pressure sensitive adhesive layer is 50 to 70%, and a number average molecular weight of a sol content thereof is 60,000 or more.Type: ApplicationFiled: March 22, 2017Publication date: September 28, 2017Applicant: LINTEC CorporationInventors: Takashi AKUTSU, Takuo NISHIDA
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Patent number: 9670382Abstract: The base film of the invention is a base film of a pressure-sensitive adhesive sheet for laminating onto a semiconductor wafer composed of: (A) a layer of a cured product in which a composition including a polyether polyol urethan(meth)acrylate oligomer and an energy ray curable monomer is cured by energy ray irradiation, and (B) a thermoplastic resin layer. The present invention, by using a surface protection sheet, protects a circuit side of a wafer with bumps, prevents collapse of bumps on the circuit side when grinding the back surface, and prevents generation of dimples or cracks on the grinding surface.Type: GrantFiled: March 22, 2012Date of Patent: June 6, 2017Assignees: LINTEC Corporation, Arakawa Chemical Industries, LTD.Inventors: Kazuyuki Tamura, Takashi Akutsu, Yuki Eto, Tomohide Hukuzaki
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Publication number: 20170131678Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.Type: ApplicationFiled: January 19, 2017Publication date: May 11, 2017Inventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
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Patent number: 9606501Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.Type: GrantFiled: March 4, 2016Date of Patent: March 28, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
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Patent number: 9559073Abstract: To prevent bumps on the circuit side of a bump-bearing wafer from getting crushed when grinding the back side of said wafer while protecting the circuit side with a surface-protection sheet, and also to minimize the formation of dimples and cracks on the side being ground. [Solution] This base film for a pressure-sensitive adhesive sheet bonded to a semiconductor wafer comprises: (A) a layer obtained by using energy rays to cure a formulation containing a urethane (meth)acrylate oligomer and a thiol-group-containing compound; and (B) a layer comprising a thermoplastic resin.Type: GrantFiled: March 22, 2012Date of Patent: January 31, 2017Assignees: LINTEC Corporation, Arakawa Chemical Industries, LTDInventors: Kazuyuki Tamura, Takashi Akutsu, Yuki Eto, Tomohide Hukuzaki
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Publication number: 20160259294Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.Type: ApplicationFiled: March 4, 2016Publication date: September 8, 2016Inventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
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Patent number: 9389578Abstract: An image-forming apparatus includes an apparatus main body, a cartridge, a movable member, including an attachment portion for attachment of the cartridge, configured to be movable relative to the apparatus main body in a state such that the cartridge is attached to the attachment portion, a protection member configured to protect the cartridge, an engagement member, provided in the cartridge, configured to be movable to an engagement position where an engagement state of the protection member with the cartridge is secured by the engagement member engaging with the protection member, and to a release position where engagement between the protection member and the engagement member is released and removal of the protection member from the cartridge is allowed, and a release member configured to move the engagement member from the engagement position to the release position by abutting the engagement member, when the cartridge is attached to the attachment portion.Type: GrantFiled: May 6, 2015Date of Patent: July 12, 2016Assignee: Canon Kabushiki KaishaInventors: Tadashi Horikawa, Tetsuya Numata, Noriyuki Komatsu, Osamu Anan, Yuichi Sakakibara, Ken Kikuchi, Takashi Akutsu
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Patent number: 9296925Abstract: A film is obtained by forming a film of and curing an energy ray-curable composition including a polymerizable silicone compound and an energy ray-curable resin having a viscosity at 25° C. of 100-5,000,000 mPa·S.Type: GrantFiled: August 2, 2013Date of Patent: March 29, 2016Assignee: LINTEC CorporationInventors: Yoji Wakayama, Isao Ichikawa, Takashi Akutsu
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Publication number: 20150323896Abstract: An image-forming apparatus includes an apparatus main body, a cartridge, a movable member, including an attachment portion for attachment of the cartridge, configured to be movable relative to the apparatus main body in a state such that the cartridge is attached to the attachment portion, a protection member configured to protect the cartridge, an engagement member, provided in the cartridge, configured to be movable to an engagement position where an engagement state of the protection member with the cartridge is secured by the engagement member engaging with the protection member, and to a release position where engagement between the protection member and the engagement member is released and removal of the protection member from the cartridge is allowed, and a release member configured to move the engagement member from the engagement position to the release position by abutting the engagement member, when the cartridge is attached to the attachment portion.Type: ApplicationFiled: May 6, 2015Publication date: November 12, 2015Inventors: Tadashi Horikawa, Tetsuya Numata, Noriyuki Komatsu, Osamu Anan, Yuichi Sakakibara, Ken Kikuchi, Takashi Akutsu
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Publication number: 20150225613Abstract: A film is obtained by forming a film of and curing an energy ray-curable composition including a polymerizable silicone compound and an energy ray-curable resin having a viscosity at 25° C. of 100-5,000,000 mPa·S.Type: ApplicationFiled: August 2, 2013Publication date: August 13, 2015Inventors: Yoji Wakayama, Isao Ichikawa, Takashi Akutsu
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Publication number: 20150192890Abstract: An electrophotographic image forming apparatus, in which a drawer supporting a cartridge is mounted in an apparatus main body, and an impact when a drawer is mounted into the apparatus main body may be suppressed to prevent a developer from scattering within a developer container. The drawer supporting the cartridge is movable between an inside position in the apparatus main body and a pullout position at which the cartridge is mounted and removed. On a forward side of the inside position, a force giving portion for giving a force to the drawer in a direction opposite to a mounting direction is provided. The force giving portion gives the force gradually to the drawer along with movement of the drawer in the mounting direction. With this structure, it is possible to suppress the scattering of the developer in the cartridge caused by the impact on mounting.Type: ApplicationFiled: January 9, 2014Publication date: July 9, 2015Applicant: CANON KABUSHIKI KAISHAInventors: Ken Kikuchi, Tsutomu Nishiuwatoko, Takashi Akutsu
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Patent number: 9046871Abstract: A process cartridge includes a main cartridge configured to be attachable to an apparatus body of an image forming apparatus, and a sub cartridge configured to be attachable to the main cartridge, wherein the main cartridge includes a moving member configured to be capable of moving between a first position for preventing, by the moving member contacting the apparatus body, the main cartridge from entering the inside of the apparatus body and a second position for allowing the main cartridge to enter the inside of the apparatus body, and a regulation member capable of moving between a regulation position for locking the moving member at the first position and an allowable position for allowing the moving member to move to the second position, and wherein the regulation member moves to the allowable position by attaching the sub cartridge to the main cartridge.Type: GrantFiled: December 17, 2012Date of Patent: June 2, 2015Assignee: Canon Kabushiki KaishaInventors: Kensuke Suzuki, Jun Miyamoto, Tsutomu Nishiuwatoko, Takashi Akutsu
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Patent number: 9037039Abstract: An electrophotographic image forming apparatus for forming an image on a recording material, includes an electrophotographic photosensitive drum; a cartridge including a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum, the cartridge containing a developer for effecting development and including a force receiving portion, wherein the cartridge is mounted to a main assembly of the electrophotographic image forming apparatus; and an urging member for urging the cartridge; wherein by mounting the cartridge, the force receiving portion receives a force from the urging member to urge the developing roller to the electrophotographic photosensitive drum.Type: GrantFiled: December 18, 2013Date of Patent: May 19, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Ken Kikuchi, Tsutomu Nishiuwatoko, Takashi Akutsu
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Patent number: 9026010Abstract: An image forming apparatus includes an image forming apparatus body and a cartridge attachable to and detachable from the image forming apparatus body. The cartridge includes a handle portion attached to the case body and grasped when attached to and detached from the image forming apparatus body. The handle portion can be positioned at a first position at which the handle portion protrudes beyond the case body, a second position at which the handle portion is closer to the case body than in the case where the handle portion is at the first position and the cartridge that has been attached to the image forming apparatus body comes into contact with the open-close portion when the open-close portion is closed, and a third position at which the handle portion is closer to the case body than in the case where the handle portion is at the second position.Type: GrantFiled: February 14, 2013Date of Patent: May 5, 2015Assignee: Canon Kabushiki KaishaInventors: Daisuke Hiramatsu, Takashi Akutsu, Ken Kikuchi