Patents by Inventor Isao Imamura
Isao Imamura 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: 7722917Abstract: An ink jet head has a head substrate including discharge elements for discharging ink, with an electric wiring board being electrically connected to the head substrate, in which the periphery of the head substrate is sealed with a first sealant, and an electric splice between the head substrate and the electric wiring board is sealed with a second sealant. The first and second sealants contain the same base resin and curing agent, and the second sealant shows higher hardness than the first sealant after curing. This ink jet head is free from problems such as cavities and fissures at the boundary of the two sealants caused by a difference in linear expansion coefficients.Type: GrantFiled: October 5, 2004Date of Patent: May 25, 2010Assignee: Canon Kabushiki KaishaInventors: Masako Shimomura, Tadayoshi Inamoto, Kazunari Ishizuka, Ryoichiro Kurobe, Yohei Sato, Akihiko Shimomura, Isao Imamura
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Patent number: 7709554Abstract: An epoxy resin composition, including: an epoxy resin (A) represented by Formula (1); an epoxy resin (B) having an epoxy equivalent of 220 or less and having twice or more epoxy groups in a molecule than epoxy groups of the epoxy resin (A); and a photocationic polymerization initiator (C), in which: the epoxy resins (A) and (B) constitute main components; and a weight of the epoxy resin (A) is 40% or more and a weight of the epoxy resin (B) is 30% or more with respect to a total weight of the epoxy resins (A) and (B): where: R represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, or a t-butyl group; n represents an integer of 0 or more and 4 or less; and m represents an integer of 1 or more and 3 or less.Type: GrantFiled: November 16, 2006Date of Patent: May 4, 2010Assignee: Canon Kabushiki KaishaInventors: Shimpei Otaka, Kazunari Ishizuka, Isamu Horiuchi, Isao Imamura
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Patent number: 7687552Abstract: An epoxy resin composition, including: an epoxy resin (A) represented by Formula (1); an epoxy resin (B) having an epoxy equivalent of 220 or less and having twice or more epoxy groups in a molecule than epoxy groups of the epoxy resin (A); and a photocationic polymerization initiator (C), in which: the epoxy resins (A) and (B) constitute main components; and a weight of the epoxy resin (A) is 40% or more and a weight of the epoxy resin (B) is 30% or more with respect to a total weight of the epoxy resins (A) and (B): where: R represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, or a t-butyl group; represents an integer of 0 or more and 4 or less; and m represents an integer of 1 or more and 3 or less.Type: GrantFiled: November 4, 2009Date of Patent: March 30, 2010Assignee: Canon Kabushiki KaishaInventors: Shimpei Otaka, Kazunari Ishizuka, Isamu Horiuchi, Isao Imamura
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Publication number: 20100045739Abstract: An epoxy resin composition, including: an epoxy resin (A) represented by Formula (1); an epoxy resin (B) having an epoxy equivalent of 220 or less and having twice or more epoxy groups in a molecule than epoxy groups of the epoxy resin (A); and a photocationic polymerization initiator (C), in which: the epoxy resins (A) and (B) constitute main components; and a weight of the epoxy resin (A) is 40% or more and a weight of the epoxy resin (B) is 30% or more with respect to a total weight of the epoxy resins (A) and (B): where: R represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, or a t-butyl group; n represents an integer of 0 or more and 4 or less; and m represents an integer of 1 or more and 3 or less.Type: ApplicationFiled: November 4, 2009Publication date: February 25, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Shimpei Otaka, Kazunari Ishizuka, Isamu Horiuchi, Isao Imamura
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Publication number: 20090315948Abstract: Sealants discharged from a syringe are irradiated with activation energy rays from a lamp. Thereby, it takes a predetermined time until the curing of the sealant begins after the irradiation of the activation energy rays. Therefore, the sealant can pass through between the lead wires in the meantime. As a result, a necessary amount of the sealant can enter into the lower side of the lead wire. Thereafter, the sealant begins to be cured and is gradually cured. In consequence, the sealant does not go through between the lead wires to flow into the lower side of the lead wire or flow out into locations other than the sealing location, and can gradually accumulate at the upper side of the lead wire to provide a sufficiently thick sealant.Type: ApplicationFiled: June 17, 2009Publication date: December 24, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Isao Imamura, Akihiko Shimomura
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Patent number: 7566758Abstract: An embodiment of the invention relates to a novel epoxy resin composition. The epoxy resin composition comprises (i) a first epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, and having a number average molecular weight ranging from 8,000 to 22,000 and a polydispersity ranging from 3.5 to 5.0, (ii) a second epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, having a number average molecular weight ranging from 2,500 to 8,000 and a polydispersity ranging from 1.5 to 3.0, and (iii) a cationic polymerization catalyst.Type: GrantFiled: December 1, 2005Date of Patent: July 28, 2009Assignee: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura
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Publication number: 20080317942Abstract: A sealant for an ink jet head includes at least an oxetane compound having a biphenyl skeleton, an alicyclic epoxy compound, and a cationic polymerization initiator.Type: ApplicationFiled: June 9, 2008Publication date: December 25, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Kouji Harada, Isao Imamura
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Publication number: 20080309719Abstract: A liquid discharge head comprises a discharge port forming member having formed therein a discharge port arranged correspond to an energy generating element which generates energy to eject a liquid and a flow path forming member for forming a flow path to supply ink to the discharge port. At least one of the discharge port forming member and the flow path forming member is made of a cured material of a composition containing an epoxy resin and a phenol resin having a higher oxygen equivalent than that of the epoxy resin.Type: ApplicationFiled: May 28, 2008Publication date: December 18, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Kazunari Ishizuka, Shimpei Otaka, Isao Imamura
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Patent number: 7425057Abstract: A liquid discharge head including a discharge element substrate including an orifice plate having a discharge port for discharging a liquid, and a supply port opened in the reverse side of the surface forming the discharge port for supplying a liquid into the discharge port; a support member having a supply path for supplying a liquid into the supply port; and a flexible wiring substrate having a blanking portion for transmitting a signal for discharging a liquid to the discharge element substrate. The discharge element substrate is electrically connected to the flexible wiring substrate on the surface opening the supply port, the flexible wiring substrate is bonded to both the discharge element substrate and the support member by means of an adhesive, the end face of the blanking portion is covered with the adhesive, the covered blanking portion communicates with the supply port, and the adhesive is a thermally fusible adhesive composed of denatured polyolefin, having a softening point of 80° C. or higher.Type: GrantFiled: March 28, 2006Date of Patent: September 16, 2008Assignee: Canon Kabushiki KaishaInventors: Kouji Harada, Isao Imamura, Hikaru Ueda
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Patent number: 7399502Abstract: An epoxy resin composition can be used for forming a film having excellent water-repellency on a substrate surface. The epoxy resin composition contains (a) an epoxy resin having at least two alicyclic epoxy groups, at least one perfluoroalkyl group having 6 to 12 carbon atoms, and at least one alkylsiloxane group and (b) a cationic polymerization catalyst. The alicyclic epoxy groups and the perfluoroalkyl group are present in branched chains of the epoxy resin, and the alkylsiloxane group is present in the main chain of the epoxy resin.Type: GrantFiled: June 27, 2005Date of Patent: July 15, 2008Assignee: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura
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Publication number: 20070142491Abstract: An epoxy resin composition, including: an epoxy resin (A) represented by Formula (1); an epoxy resin (B) having an epoxy equivalent of 220 or less and having twice or more epoxy groups in a molecule than epoxy groups of the epoxy resin (A); and a photocationic polymerization initiator (C), in which: the epoxy resins (A) and (B) constitute main components; and a weight of the epoxy resin (A) is 40% or more and a weight of the epoxy resin (B) is 30% or more with respect to a total weight of the epoxy resins (A) and (B): where: R represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, or a t-butyl group; n represents an integer of 0 or more and 4 or less; and m represents an integer of 1 or more and 3 or less.Type: ApplicationFiled: November 16, 2006Publication date: June 21, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Shimpei Otaka, Kazunari Ishizuka, Isamu Horiuchi, Isao Imamura
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Publication number: 20060230614Abstract: In a method for manufacturing a liquid discharge head having a support member bonded with an adhesive to a discharge element substrate forming a discharge port for discharging a liquid, the adhesive contains a multifunctional epoxy resin of epoxy equivalent of 150 or less, a curing agent, and a mercapto silane coupling agent, and the adhesive is applied to one side or both sides of junction surfaces of the both members, and the both members of the liquid discharge head are positioned, and heated and pressed, and the adhesive is cured to bond the both members.Type: ApplicationFiled: March 29, 2006Publication date: October 19, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Isao Imamura, Hikaru Ueda
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Publication number: 20060221133Abstract: A liquid discharge head comprising: a discharge element substrate including an orifice plate having a discharge port for discharging a liquid, and a supply port opened in the reverse side of the surface forming the discharge port for supplying a liquid into the discharge port; a support member having a supply path for supplying a liquid into the supply port; and a flexible wiring substrate having a blanking portion for transmitting a signal for discharging a liquid to the discharge element substrate. The discharge element substrate is electrically connected to the flexible wiring substrate on the surface opening the supply port, the flexible wiring substrate is bonded to both the discharge element substrate and the support member by means of an adhesive, and the end face of the blanking portion is covered with the adhesive, the covered blanking portion communicates with the supply port, and the adhesive is a thermally fusible adhesive composed of denatured polyolefin, having a softening point of 80° C.Type: ApplicationFiled: March 28, 2006Publication date: October 5, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Kouji Harada, Isao Imamura, Hikaru Ueda
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Patent number: 7074273Abstract: An embodiment of the invention relates to a novel epoxy resin composition. The epoxy resin composition comprises (i) a first epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, and having a number average molecular weight ranging from 8,000 to 22,000 and a polydispersity ranging from 3.5 to 5.0, (ii) a second epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, having a number average molecular weight ranging from 2,500 to 8,000 and a polydispersity ranging from 1.5 to 3.0, and (iii) a cationic polymerization catalyst.Type: GrantFiled: January 14, 2003Date of Patent: July 11, 2006Assignee: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura
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Publication number: 20060089466Abstract: An embodiment of the invention relates to a novel epoxy resin composition. The epoxy resin composition comprises (i) a first epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, and having a number average molecular weight ranging from 8,000 to 22,000 and a polydispersity ranging from 3.5 to 5.0, (ii) a second epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, having a number average molecular weight ranging from 2,500 to 8,000 and a polydispersity ranging from 1.5 to 3.0, and (iii) a cationic polymerization catalyst.Type: ApplicationFiled: December 1, 2005Publication date: April 27, 2006Applicant: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura
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Patent number: 6992117Abstract: An epoxy resin composition can be used for forming a film having excellent water-repellency on a substrate surface. The epoxy resin composition contains (a) an epoxy resin having at least two alicyclic epoxy groups, at least one perfluoroalkyl group having 6 to 12 carbon atoms, and at least one alkylsiloxane group and (b) a cationic polymerization catalyst. The alicyclic epoxy groups and the perfluoroalkyl group are present in branched chains of the epoxy resin, and the alkylsiloxane group is present in the main chain of the epoxy resin.Type: GrantFiled: January 13, 2003Date of Patent: January 31, 2006Assignee: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura
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Publication number: 20050267265Abstract: An epoxy resin composition can be used for forming a film having excellent water-repellency on a substrate surface. The epoxy resin composition contains (a) an epoxy resin having at least two alicyclic epoxy groups, at least one perfluoroalkyl group having 6 to 12 carbon atoms, and at least one alkylsiloxane group and (b) a cationic polymerization catalyst. The alicyclic epoxy groups and the perfluoroalkyl group are present in branched chains of the epoxy resin, and the alkylsiloxane group is present in the main chain of the epoxy resin.Type: ApplicationFiled: June 27, 2005Publication date: December 1, 2005Applicant: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura
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Patent number: 6895668Abstract: A manufacturing method of an ink-jet recording head includes the following steps. An ink-repellent second active energy ray setting resin is coated over a first active energy ray setting resin for forming a liquid path. The first resin is set. Both resins are exposed, and both resins are developed.Type: GrantFiled: March 15, 2000Date of Patent: May 24, 2005Assignee: Canon Kabushiki KaishaInventor: Isao Imamura
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Publication number: 20050078143Abstract: An ink jet head has a head substrate including discharge elements for discharging ink, with an electric wiring board being electrically connected to the head substrate, in which the periphery of the head substrate is sealed with a first sealant, and an electric splice between the head substrate and the electric wiring board is sealed with a second sealant. The first and second sealants contain the same base resin and curing agent, and the second sealant shows higher hardness than the first sealant after curing. This ink jet head is free from problems such as cavities and fissures at the boundary of the two sealants caused by a difference in linear expansion coefficients.Type: ApplicationFiled: October 5, 2004Publication date: April 14, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Masako Shimomura, Tadayoshi Inamoto, Kazunari Ishizuka, Ryoichiro Kurobe, Yohei Sato, Akihiko Shimomura, Isao Imamura
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Patent number: 6869541Abstract: An epoxy resin composition suitable for forming a film of excellent water repellency which comprises an epoxy resin having one or more water repellent groups and two or more cyclic aliphatic epoxy groups per molecule, a triazine-base catalyst for cationic polymerization and a non-polar solvent.Type: GrantFiled: February 21, 2003Date of Patent: March 22, 2005Assignee: Canon Kabushiki KaishaInventors: Akihiko Shimomura, Hiromichi Noguchi, Isao Imamura