Patents by Inventor Tomomi Fukaya
Tomomi Fukaya 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: 10649354Abstract: The present disclosure relates to an electrophotographic photoreceptor which can suppress occurrence of abnormalities such as peeling or falling off of a film from a substrate end portion in a film formation step of a surface layer and maintain and reproduce a stable printing quality even in a use stage after productization, and an image forming apparatus including the same. An electrophotographic photoreceptor includes a cylindrical substrate including a chamfered face located between an substrate outer circumferential surface and a substrate end face, and a surface layer located on the outer circumferential surface. The substrate outer circumferential surface includes a first uneven portion. The chamfered face includes a second uneven portion and a third uneven portion located on a surface of the second uneven portion. A surface roughness Sa of the second uneven portion is larger than a surface roughness Sa of the third uneven portion.Type: GrantFiled: December 27, 2017Date of Patent: May 12, 2020Assignee: KYOCERA CORPORATIONInventor: Tomomi Fukaya
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Publication number: 20190310563Abstract: The present disclosure relates to an electrophotographic photoreceptor which can suppress occurrence of abnormalities such as peeling or falling off of a film from a substrate end portion in a film formation step of a surface layer and maintain and reproduce a stable printing quality even in a use stage after productization, and an image forming apparatus including the same. An electrophotographic photoreceptor includes a cylindrical substrate including a chamfered face located between an substrate outer circumferential surface and a substrate end face, and a surface layer located on the outer circumferential surface. The substrate outer circumferential surface includes a first uneven portion. The chamfered face includes a second uneven portion and a third uneven portion located on a surface of the second uneven portion. A surface roughness Sa of the second uneven portion is larger than a surface roughness Sa of the third uneven portion.Type: ApplicationFiled: December 27, 2017Publication date: October 10, 2019Applicant: KYOCERA CorporationInventor: Tomomi FUKAYA
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Patent number: 10222714Abstract: An electrophotographic photoreceptor includes: a cylindrical base body having a two-step stepped chamfer between a base body outer peripheral face and a base body end face; and a surface layer located on the base body outer peripheral face. The cylindrical base body has an outer chamfered face and an inner chamfered face lying closer to an end face than the outer chamfered face. A length L2 of the inner chamfered face is larger than a length L1 of the outer chamfered face, namely L1<L2, as viewed in lateral section taken along a rotation axis of the cylindrical base body.Type: GrantFiled: March 13, 2018Date of Patent: March 5, 2019Assignee: KYOCERA CORPORATIONInventor: Tomomi Fukaya
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Publication number: 20180275536Abstract: An electrophotographic photoreceptor includes: a cylindrical base body having a two-step stepped chamfer between a base body outer peripheral face and a base body end face; and a surface layer located on the base body outer peripheral face. The cylindrical base body has an outer chamfered face and an inner chamfered face lying closer to an end face than the outer chamfered face. A length L2 of the inner chamfered face is larger than a length L1 of the outer chamfered face, namely L1<L2, as viewed in lateral section taken along a rotation axis of the cylindrical base body.Type: ApplicationFiled: March 13, 2018Publication date: September 27, 2018Inventor: Tomomi FUKAYA
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Patent number: 9695332Abstract: A release film for producing a green sheet of the present invention includes a base material and a release agent layer provided at a side of a first surface of the base material. The release agent layer includes an ultraviolet curable compound (A) having three or more reactive groups selected from the group consisting of a (meth)acryloyl group, an alkenyl group and a maleimide group in one molecule thereof, a polyorganosiloxane (B) and an ?-aminoalkylphenone based photopolymerization initiator (C). An arithmetic average roughness Ra1 of an outer surface of the release agent layer may be different than an arithmetic average roughness Ra2 of a second surface of the base material. According to the present invention, it is possible to prevent pinholes and variation in partially thickness from occurring to the green sheet.Type: GrantFiled: March 14, 2013Date of Patent: July 4, 2017Assignee: Lintec CorporationInventors: Tomomi Fukaya, Shinya Ichikawa
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Patent number: 9279065Abstract: A release sheet comprising a base material and a release agent layer formed on at least one surface of the base material by using a release agent composition; the release agent composition contains a first polydimethylsiloxane having at least two alkenyl groups in one molecule and a second polydimethylsiloxane having at least two hydrosilyl groups in one molecule; the release agent composition contains 0.40 to 5.25 mmol of the alkenyl groups and 7.00 to 120.00 mmol of the hydrosilyl groups in a total of 30 g of the first polydimethylsiloxane and the second polydimethylsiloxane; and a molar ratio (b/a) of the hydrosilyl groups (b) to the alkenyl groups (a) is 3.0 to 70.0. Consequently, it is possible to suppress the peeling force from increasing even when the release agent layer of the release sheet is exposed to the air for a long time.Type: GrantFiled: December 20, 2012Date of Patent: March 8, 2016Assignee: LINTEC CORPORATIONInventors: Keiichi Sato, Tomomi Fukaya
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Patent number: 9227382Abstract: A release sheet comprising a base material and a release agent layer formed on at least one surface of the base material, wherein: the release agent layer is formed by using a release agent composition; the release agent composition contains a first polydimethylsiloxane having at least two alkenyl groups in one molecule and a second polydimethylsiloxane having at least two hydrosilyl groups in one molecule; the release agent composition contains 10.00 to 16.00 mmol of the alkenyl groups and 40.00 to 145.00 mmol of the hydrosilyl groups in a total of 30 g of the first polydimethylsiloxane and the second polydimethylsiloxane; and a molar ratio (b/a) of the hydrosilyl groups (b) to the alkenyl groups (a) is 2.0 to 15.0. According to the release sheet, it is possible to suppress the peeling force from increasing even when the release agent layer of the release sheet is exposed to the air for a long time.Type: GrantFiled: December 20, 2012Date of Patent: January 5, 2016Assignee: LINTEC CORPORATIONInventors: Keiichi Sato, Tomomi Fukaya
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Publication number: 20150119512Abstract: A release sheet comprising a base material and a release agent layer formed on at least one surface of the base material, wherein: the release agent layer is formed by using a release agent composition; the release agent composition contains a first polydimethylsiloxane having at least two alkenyl groups in one molecule and a second polydimethylsiloxane having at least two hydrosilyl groups in one molecule; the release agent composition contains 10.00 to 16.00 mmol of the alkenyl groups and 40.00 to 145.00 mmol of the hydrosilyl groups in a total of 30 g of the first polydimethylsiloxane and the second polydimethylsiloxane; and a molar ratio (b/a) of the hydrosilyl groups (b) to the alkenyl groups (a) is 2.0 to 15.0. According to the release sheet, it is possible to suppress the peeling force from increasing even when the release agent layer of the release sheet is exposed to the air for a long time.Type: ApplicationFiled: December 20, 2012Publication date: April 30, 2015Inventors: Keiichi Sato, Tomomi Fukaya
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Publication number: 20150086749Abstract: A release film for producing a green sheet of the present invention includes a base material having a first surface and a second surface, a release agent layer formed by applying a material containing an active energy ray curable compound (a1) and a polyorganosiloxane (b1) onto a side of the first surface of the base material and curing the material, and a back coat layer formed by applying a material containing an active energy ray curable compound (a2) onto a side of the second surface of the base material and curing the material. An arithmetic average roughness Ra2 of an outer surface of the release agent layer is 8 nm or less and a maximum projection height Rp2 of the outer surface is 50 nm or lower. An arithmetic average roughness Ra3 of an outer surface of the back coat layer is in the range of 5 to 40 nm and a maximum projection height Rp3 of the outer surface of the back coat layer is in the range of 60 to 500 nm.Type: ApplicationFiled: March 14, 2013Publication date: March 26, 2015Inventors: Tomomi Fukaya, Shinya Ichikawa
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Publication number: 20150072108Abstract: A release film for producing a green sheet of the present invention includes a base material and a release agent layer provided at a side of a first surface of the base material. The release agent layer includes an ultraviolet curable compound (A) having three or more reactive groups selected from the group consisting of a (meth)acryloyl group, an alkenyl group and a maleimide group in one molecule thereof, a polyorganosiloxane (B) and an ?-aminoalkylphenone based photopolymerization initiator (C). An average thickness of the release agent layer is in the range of 0.3 to 2 ?m. An arithmetic average roughness Ra1 of an outer surface of the release agent layer is 8 nm or less and a maximum projection height Rp1 of the outer surface is 50 nm or lower. An arithmetic average roughness Ra2 of a second surface of the base material is in the range of 5 to 40 nm and a maximum projection height Rp2 of the second surface is in the range of 60 to 500 nm.Type: ApplicationFiled: March 14, 2013Publication date: March 12, 2015Inventors: Tomomi Fukaya, Shinya Ichikawa
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Publication number: 20150064402Abstract: A release film for producing a green sheet of the present invention includes a base material having a first surface and a second surface and a release agent layer formed at a side of the first surface of the base material. A maximum projection height Rp2 of the second surface of the base material is in the range of 60 to 500 nm. An area occupation ratio of projections having a height of 60 nm or higher in the second surface is 10% or less. According to the present invention, it is possible to prevent pinholes and variation in partially thickness from occurring to the green sheet.Type: ApplicationFiled: March 14, 2013Publication date: March 5, 2015Inventors: Tomomi Fukaya, Shinya Ichikawa
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Publication number: 20150050457Abstract: A release film comprises a base material and a release agent layer provided at one side of the base material. The release agent layer comprises a cured material of a release agent composition. The release agent composition contains an active energy ray curable component and a silicone-based component. A surface of the release agent layer at the opposite side to the base material has an arithmetic average roughness (Ra) of 8 nm or less and a maximum projection height (Rp) of 50 nm or less. An elastic modulus measured by a nanoindentation test of the release agent layer is 4.0 GPa or more. A surface of the base material at the opposite side to the release agent layer has an arithmetic average roughness (Ra) of 5 to 50 nm and a maximum projection height (Rp) of 30 to 500 nm.Type: ApplicationFiled: February 4, 2013Publication date: February 19, 2015Inventors: Tomomi Fukaya, Shinya Ichikawa
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Publication number: 20150045504Abstract: A release sheet comprising a base material and a release agent layer formed on at least one surface of the base material by using a release agent composition; the release agent composition contains a first polydimethylsiloxane having at least two alkenyl groups in one molecule and a second polydimethylsiloxane having at least two hydrosilyl groups in one molecule; the release agent composition contains 0.40 to 5.25 mmol of the alkenyl groups and 7.00 to 120.00 mmol of the hydrosilyl groups in a total of 30 g of the first polydimethylsiloxane and the second polydimethylsiloxane; and a molar ratio (b/a) of the hydrosilyl groups (b) to the alkenyl groups (a) is 3.0 to 70.0. Consequently, it is possible to suppress the peeling force from increasing even when the release agent layer of the release sheet is exposed to the air for a long time.Type: ApplicationFiled: December 20, 2012Publication date: February 12, 2015Inventors: Keiichi Sato, Tomomi Fukaya
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Publication number: 20150037536Abstract: A release film for a ceramic green sheet production process is provided. The release film comprises a base material and a release agent layer provided at one side of the base material. The release agent layer comprises a cured material of a release agent composition. The release agent composition contains an active energy ray curable component and a silicone-based component. A surface of the release agent layer at the opposite side to the base material has an arithmetic average roughness (Ra) of 8 nm or less and a maximum projection height (Rp) of 50 nm or less. According to the release film for a ceramic green sheet production process, it is possible to effectively prevent/suppress the occurrence of defects such as pinholes and thickness irregularity in a ceramic green sheet, and the releasability of a ceramic green sheet is also excellent.Type: ApplicationFiled: February 4, 2013Publication date: February 5, 2015Inventors: Tomomi Fukaya, Shinya Ichikawa
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Publication number: 20140050887Abstract: A releasing film for ceramic green sheet production processes a base material, a resin layer laminated on a first surface of the base material. The resin layer has a conductive polymer and with a thickness of 30-290 nm. A releasing agent layer is laminated on the resin layer, and the surface of the releasing agent layer has a maximum profile peak height of 10-100 nm. A second surface of the base material preferably has an arithmetic mean roughness of 5-50 nm and a maximum profile peak height of 40-300 nm. Such a releasing film can obtain high smoothness of the releasing agent layer and effectively suppress the electrostatic charge while suppressing the releasing agent layer from dropping off.Type: ApplicationFiled: April 9, 2012Publication date: February 20, 2014Applicant: LINTEC CORPORATIONInventors: Tomomi Fukaya, Keiichi Sato
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Patent number: 8110271Abstract: There is provided an adhesive sheet comprising an adhesive base sheet, an adhesive layer, and a release sheet laminated in sequence from the adhesive base sheet. The release sheet comprises a release agent layer and a release base material laminated in sequence from the adhesive layer. A release force between the release sheet and the adhesive layer is decreased by an external stimulus.Type: GrantFiled: March 19, 2007Date of Patent: February 7, 2012Assignee: Lintec CorporationInventors: Osamu Takeuchi, Takuo Nishida, Tomomi Fukaya
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Patent number: 8034417Abstract: There can be provided a casting film for producing a ceramic green sheet which film comprises a substrate film, an undercoat layer and a cured layer, wherein the undercoat layer is composed of a condensation polymer from a metal alkoxide and/or a partially hydrolyzed product of a metal alkoxide, and the cured layer is formed by heat treating at 40 to 120° C., an addition reaction type silicone resin composition containing a photosensitizer in a coating amount of 0.01 to 0.3 g/m2 expressed in terms of solid content, and thereafter ultraviolet irradiating the composition to cure the same.Type: GrantFiled: February 23, 2010Date of Patent: October 11, 2011Assignee: Lintec CorporationInventors: Tomomi Fukaya, Toru Nakamura
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Patent number: 7947361Abstract: A film having an antistatic releasing agent layer comprising fiber-shaped carbon and disposed on at least one of the faces of a substrate film, a release film having a releasing agent layer disposed on one face of a substrate and an antistatic layer which comprises a cured product of a resin composition of the active energy ray curing type comprising fiber-shaped carbon or a combination of fiber-shaped carbon and an electrically conductive macromolecular compound and is disposed on the other face of the substrate film, and processes for producing the films. The release films have a relatively small thickness of the antistatic layer, exhibit the stable antistatic function, are excellent in smoothness, do not adversely affect hardening of the resin releasing agent, exhibit the excellent releasing function and provide the excellent productivity.Type: GrantFiled: January 12, 2007Date of Patent: May 24, 2011Assignee: Lintec CorporationInventors: Tomomi Fukaya, Toshio Sugizaki
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Patent number: 7803452Abstract: A release film that can be used as a carrier film for a green sheet used in a laminated ceramic capacitor is provided. The release film includes a base material having both major surfaces, a releasing agent layer provided on one major surface of the base material, and an antistatic layer provided on the other major surface of the base material, wherein the releasing agent layer and the antistatic layer are mainly composed of the same material, and when the surface roughness of the outer surface of the releasing agent layer is defined as Ra1 [nm] and the surface roughness of the outer surface of the antistatic layer is defined as Ra2 [nm], the relations of Ra1?15 and Ra1?Ra2 are satisfied. The release film is capable of preventing occurrence of blocking when being wound in a rolled form for storage and generation of static electricity when being unwound.Type: GrantFiled: March 30, 2006Date of Patent: September 28, 2010Assignee: Lintec CorporationInventors: Ryo Takahashi, Tomomi Fukaya, Toshio Sugizaki
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Publication number: 20100151141Abstract: There can be provided a casting film for producing a ceramic green sheet which film comprises a substrarte film, an undercoat layer and a cured layer, wherein the undercoat layer is composed of a condensation polymer from a metal alkoxide and/or a partially hydrolyzed product of a metal alkoxide, and the cured layer is formed by heat treating at 40 to 120° C., an addition reaction type silicone resin composition containing a photosensitizer in a coating amount of 0.01 to 0.3 g/m2 expressed in terms of solid content, and thereafter ultraviolet irradiating the composition to cure the same.Type: ApplicationFiled: February 23, 2010Publication date: June 17, 2010Applicant: LINTEC CORPORATIONInventors: Tomomi FUKAYA, Toru Nakamura