Patents by Inventor Tomoko Kanazawa
Tomoko Kanazawa 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).
-
Publication number: 20170202249Abstract: A container-filled beverage for a person with swallowing difficulty, which contains a thickening agent, has a viscosity of 50 mPa·s or more, and is filled in a light-shielding container.Type: ApplicationFiled: April 3, 2017Publication date: July 20, 2017Inventors: Hiroshi BATORI, Toshiyuki AKACHI, Tomoko KANAZAWA, Keiji KUROIWA, Tomoe TAMAI, Takasuke UMETSU, Hiroshi ENDOU, Yoshinari SUGANUMA, Kazuo YAMAMOTO, Moeko KAWAMORI, Hikaru NAKAMOTO
-
Patent number: 9507282Abstract: The present invention provides an electrophotographic photoreceptor comprising a multilayered photosensitive layer or a monolayer photosensitive layer, wherein the multilayered photosensitive layer comprises at least a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material that are stacked on a conductive substrate in this order, and the monolayer photosensitive layer contains a charge generation material and a charge transport material that is stacked on a conductive substrate, wherein the electrophotographic photoreceptor contains 5 to 17 wt % of fluorine resin fine particles and their aggregates with respect to all photoreceptor components in a surface layer of the photoreceptor, wherein the fluorine resin fine particles are 0.1 to 0.Type: GrantFiled: May 18, 2015Date of Patent: November 29, 2016Assignee: Sharp Kabushiki KaishaInventors: Akiko Kihara, Kotaro Fukushima, Masaki Hashimoto, Koichi Toriyama, Takahiro Kurauchi, Rikiya Matsuo, Tomoko Kanazawa, Chikako Iibachi
-
Patent number: 9316933Abstract: An electrophotographic photoreceptor having a photosensitive layer formed on a conductive substrate, wherein the photosensitive layer contains oxygen-containing fluorinated fine particles in a surface layer thereof, and the oxygen-containing fluorinated fine particles have an oxygen composition ratio of 0.9 to 3.0% by atom based on the whole composition of the fine particles according to an X-ray fluorescence composition analysis.Type: GrantFiled: May 20, 2014Date of Patent: April 19, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Kotaro Fukushima, Kimiko Kumazawa, Koichi Toriyama, Takahiro Kurauchi, Tomoko Kanazawa, Chikako Iibachi, Rikiya Matsuo
-
Publication number: 20150346615Abstract: The present invention provides an electrophotographic photoreceptor comprising a multilayered photosensitive layer or a monolayer photosensitive layer, wherein the multilayered photosensitive layer comprises at least a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material that are stacked on a conductive substrate in this order, and the monolayer photosensitive layer contains a charge generation material and a charge transport material that is stacked on a conductive substrate, wherein the electrophotographic photoreceptor contains 5 to 17 wt % of fluorine resin fine particles and their aggregates with respect to all photoreceptor components in a surface layer of the photoreceptor, wherein the fluorine resin fine particles are 0.1 to 0.Type: ApplicationFiled: May 18, 2015Publication date: December 3, 2015Inventors: Akiko KIHARA, Kotaro FUKUSHIMA, Masaki HASHIMOTO, Koichi TORIYAMA, Takahiro KURAUCHI, Rikiya MATSUO, Tomoko KANAZAWA, Chikako IIBACHI
-
Publication number: 20150160572Abstract: The present invention provides a coating solution for forming a charge transport layer including a charge transport material, a binder resin and tetrafluoroethylene resin fine particles, wherein the binder resin exhibits a surface free energy of 25 to 35 mJ/mm2 in the charge transport layer formed with a coating solution for forming a charge transport layer without comprising the tetrafluoroethylene resin fine particles; and the tetrafluoroethylene resin fine particles (1) include primary particles having an average particle diameter of 0.1 to 0.5 ?m and secondary particles corresponding to aggregates of the primary particles; (2) account for 1 to 30% by weight of non-solvent components in the coating solution; (3) contain primary particles and secondary particles having a particle diameter of less than 1 ?m at a content of less than 80% by weight; and (4) contain secondary particles having a particle diameter of 3 ?m or more at a content of no more than 5% by weight.Type: ApplicationFiled: November 14, 2014Publication date: June 11, 2015Inventors: Kotaro FUKUSHIMA, Kouki BABA, Tomoko KANAZAWA, Takahiro KURAUCHI
-
Publication number: 20150017580Abstract: An electrophotographic photoreceptor having a photosensitive layer formed on a conductive substrate, wherein the photosensitive layer contains oxygen-containing fluorinated fine particles in a surface layer thereof, and the oxygen-containing fluorinated fine particles have an oxygen composition ratio of 0.9 to 3.0% by atom based on the whole composition of the fine particles according to an X-ray fluorescence composition analysis.Type: ApplicationFiled: May 20, 2014Publication date: January 15, 2015Inventors: Kotaro FUKUSHIMA, Kimiko KUMAZAWA, Koichi TORIYAMA, Takahiro KURAUCHI, Tomoko KANAZAWA, Chikako IIBACHI, Rikiya MATSUO
-
Patent number: 8343697Abstract: An electrophotographic photoconductor containing at least a charge generation material and a charge transport material on a conductive support, the electrophotographic photoconductor comprising a diamine compound represented by the formula (1), and also a polyarylate resin having a structural unit represented by the following formula (I).Type: GrantFiled: April 13, 2009Date of Patent: January 1, 2013Assignee: Sharp Kabushiki KaishaInventors: Tomoko Kanazawa, Hiroshi Sugimura
-
Patent number: 7803507Abstract: An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time, which electrophotographic photoreceptor excels in mechanical strength. A photosensitive layer (14) of an electrophotographic photoreceptor (1) includes a polyarylate resin having structural units, for example, those of formula (1) and an enamine compound represented by, for example, formula (2) The variables R1, R2, R3, R4, R7˜R10, X1, Ar1, Ar2, Ar3, Ar4, Ar5, R11, R12, R13, R14, a, m, and n are as defined in the specification. By virtue of these, the electrophotographic photoreceptor (1) of excellent mechanical strength and favorable electrical characteristics can be realized.Type: GrantFiled: February 6, 2004Date of Patent: September 28, 2010Assignee: Sharp Kabushiki KaishaInventors: Tatsuhiro Morita, Tomoko Kanazawa, Akihiro Kondoh, Yohichi Takesawa, Takatsugu Obata, Shinya Mimura, Hiroshi Sugimura
-
Patent number: 7638248Abstract: An electrophotographic photoconductor containing a conductive substrate and at least a charge generating layer and a charge transporting layer successively layered on the substrate, wherein the charge transporting layer contains a charge transporting material (M) and a binder resin (B) and further has a layered structure composed of a plurality of the charge transporting layers wherein the outermost layer of the charge transporting layers show 50% or higher elastic power (?Hu) and hardness (Hplast) of plastic deformation in a range from 220 N/mm2 or higher to 275 N/mm2 or lower.Type: GrantFiled: November 7, 2006Date of Patent: December 29, 2009Assignee: Sharp Kabushiki KaishaInventors: Kotaro Fukushima, Hisayuki Utsumi, Tomoko Kanazawa, Katsuya Takano
-
Patent number: 7625682Abstract: An electrophotographic photoreceptor having an organic photosensitive layer at the surface layer is provided which can improve the wear resistance, durability and operation stability of the surface layer and can form images with no injury and unevenness in the density for a long period of time. The electrophotographic photoreceptor includes a conductive substrate, an undercoat layer, and a photosensitive layer having a charge generating layer and a charge transporting layer. In the photoreceptor, the photosensitive layer has a creep value CI? of 2.70% or more and an elastic ratio ?HU of 47% or more in a case where an indentation maximum load of 5 mN is loaded on the surface under a circumstance at a temperature of 25° C. and at a relatively humidity of 50%.Type: GrantFiled: August 8, 2005Date of Patent: December 1, 2009Assignee: Sharp Kabushiki KaishaInventors: Tomoko Kanazawa, Kotaro Fukushima
-
Publication number: 20090257777Abstract: An electrophotographic photoconductor containing at least a charge generation material and a charge transport material on a conductive support, the electrophotographic photoconductor comprising a diamine compound represented by the formula (1), and also a polyarylate resin having a structural unit represented by the following formula (I).Type: ApplicationFiled: April 13, 2009Publication date: October 15, 2009Inventors: Tomoko KANAZAWA, Hiroshi Sugimura
-
Publication number: 20080138727Abstract: It is an object of the present invention to provide a highly durable electrophotographic photoreceptor which is superior in mechanical and electrical durability and does not cause abnormal images to occur for prolonged repeated use, and an image forming apparatus including the same. An electrophotographic photoreceptor comprising at least a charge generation layer and a charge transport layer in this order on a conductive substrate, wherein the outermost surface layer of the electrophotographic photoreceptor contains filler particles and the filler particles in the layer satisfy the following equation (I): 1.0×10?3?(df×b3)/(dm×a3)?2.5×10?2 , ??(I) wherein “a” is an average filler interparticle distance (nm), “b” is an average diameter (nm) of filler particles, “df” is a density (g/cm3) of the filler particles, and “dm” is an average density (g/cm3) of a solid in the outermost surface layer is provided.Type: ApplicationFiled: December 5, 2007Publication date: June 12, 2008Inventors: Kotaro FUKUSHIMA, Tomoko Kanazawa, Tomomi Nakamura
-
Publication number: 20070105031Abstract: An electrophotographic photoconductor comprising a conductive substrate and at least a charge generating layer and a charge transporting layer successively layered on the substrate, wherein the charge transporting layer comprises a charge transporting material (M) and a binder resin (B) which contains, as a main component, a compound represented by the general formula (1): in which R1, R2, R3, R4, R5, R6, R7 and R8, may be the same or different each other and each independently denote a hydrogen atom, a halogen atom, or a substituted or unsubstituted C1 to C6 alkyl group; and R9 and R10 may be the same or different each other and each independently denote a hydrogen atom, a halogen atom, a substituted or unsubstituted C1 to C6 alkyl group, a saturated cyclic C4 to C10 hydrocarbyl group, or a substituted or unsubstituted aryl group; and n denotes an integer: and further has a layered structure composed of a plurality of said charge transporting layers wherein the outermost layer of the said charge tranType: ApplicationFiled: November 7, 2006Publication date: May 10, 2007Applicant: SHARP KABUSHIKI KAISHAInventors: Kataro Fukushima, Hisayuki Utsumi, Tomoko Kanazawa, Katsuya Takano
-
Publication number: 20070026334Abstract: An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time which electrophotographic photoreceptor excels in mechanical strength. A photosensitive layer (14) of an electrophotographic photoreceptor (1) includes a polyarylate resin having structural units, for example, those of the aforementioned formula (1-3) and an enamine compound represented by, for example, aforementioned formula (2-1). By virtue of these, the electrophotographic photoreceptor (1) of excellent mechanical strength and favorable electrical characteristics can be realized.Type: ApplicationFiled: February 6, 2004Publication date: February 1, 2007Applicant: Sharp Kabushiki KaishaInventors: Tatsuhiro Morita, Tomoko Kanazawa, Akihiro Kondoh, Yohichi Takesawa, Takatsugu Obata, Shinya Mimura, Hiroshi Sugimura
-
Publication number: 20060029874Abstract: An electrophotographic photoreceptor having an organic photosensitive layer at the surface layer is provided which can improve the wear resistance, durability and operation stability of the surface layer and can form images with no injury and unevenness in the density for a long period of time. The electrophotographic photoreceptor includes a conductive substrate, an undercoat layer, and a photosensitive layer having a charge generating layer and a charge transporting layer. In the photoreceptor, the photosensitive layer has a creep value CI? of 2.70% or more and an elastic ratio ?HU of 47% or more in a case where an indentation maximum load of 5 mN is loaded on the surface under a circumstance at a temperature of 25° C. and at a relatively humidity of 50%.Type: ApplicationFiled: August 8, 2005Publication date: February 9, 2006Inventors: Tomoko Kanazawa, Kotaro Fukushima
-
Patent number: 6573105Abstract: A test method for a coating liquid for an electrophotographic photoconductor includes calculating a peak area ratio of a component to be analyzed in a coating liquid by pyrolysis gas chromatography, and comparing the peak area ratio with a pre-obtained peak area ratio of the component in a reference coating liquid having a known content of the component, to determine the ratio and/or content of the component in the coating liquid. A control method for controlling a coating liquid based on the test result as obtained is also provided.Type: GrantFiled: June 6, 2000Date of Patent: June 3, 2003Assignee: Sharp Kabushiki KaishaInventors: Tomoko Kanazawa, Yoshihide Shimoda, Sayaka Fujita, Tadashi Nakamura, Masayuki Sakamoto, Tatsuhiro Morita
-
Patent number: 6136485Abstract: The object of the invention is to provide a highly characteristic and lesser defective image using an electrophotographic photoreceptor which can be produced with a better coating property and which is highly sensitive and hardly loses the electrostatic stability during repeated use. A water-soluble or water/alcohol-soluble polyvinyl acetal and an inorganic pigment are involved in an underlayer provided between a conductive support and a photoconductive layer. Particularly, it is favorable to use titanium oxide as the inorganic pigment, make the ratio of polyvinyl acetal/titanium oxide 1/9-9/1 by weight, make the underlayer 0.5-5 .mu.Type: GrantFiled: November 9, 1998Date of Patent: October 24, 2000Assignee: Sharp Kabushiki KaishaInventors: Kazuya Ishida, Satoshi Katayama, Takahiro Teramoto, Akihiko Kawahara, Kazushige Morita, Tomoko Kanazawa
-
Patent number: 6136484Abstract: Highly sensitive and highly durable electrophotographic photoreceptors which generate faultless images can be produced by forming the under-coating layer on the conductive support and forming the photoreceptive layer on the layer. The under-coating layer contains dendritic titanium oxide. The under-coating layer contains the dendritic titanium oxide of which the surface is coated with (a) metal oxide(s) and/or (an) organic compound(s). The photoreceptive layer contains a phthalocyanine pigment, and the under-coating layer contains dendritic or needle-like titanium oxide of which the surface is coated with (a) metal oxide(s) and/or (an) organic compound(s). The photoreceptive layer contains a phthalocyanine pigment, and the under-coating layer contains dendritic or needle-like titanium oxide, of which the surface is coated with (a) metal oxide(s) and/or (an) organic compound(s), and an alcohol soluble polyamide resin.Type: GrantFiled: June 1, 1999Date of Patent: October 24, 2000Assignee: Sharp Kabushiki KaishaInventors: Satoshi Katayama, Yoshihide Shimoda, Makoto Kurokawa, Mikio Kakui, Hiroko Ishibashi, Tadashi Nakamura, Tatsuhiro Morita, Masayuki Sakamoto, Kazushige Morita, Tomoko Kanazawa, Akihiko Kawahara
-
Patent number: 5958638Abstract: An object of the invention is to provide an electrophotographic photoconductor featuring uniform chargeability to a predetermined potential, low residual potential and excellent stability in the operating environment and repeated use thereof, as well as a method of producing the same. An undercoat layer between a substrate and a photosensitive layer is formed by the use of a coating fluid for undercoat layer containing a coupling agent having an unsaturated bond, a metal oxide, a binder and a mixture solvent. The coupling agent increases affinity of the metal oxide for the binder so that the coating fluid does not suffer the aggregation of the metal oxide or gelation thereof, presenting homogeneity and excellent can-stability. Thus is obtained a uniform undercoat layer.Type: GrantFiled: June 18, 1998Date of Patent: September 28, 1999Assignee: Sharp Kabushiki KaishaInventors: Satoshi Katayama, Takahiro Teramoto, Kiyofumi Morimoto, Satoshi Machino, Tatsuhiro Morita, Tomoko Kanazawa
-
Patent number: 5952146Abstract: An object of the present invention is to improve the storage stability of a coating liquid for forming a photosensitive layer of a photosensitive member for electrophotography as well as to improve the electrophotography properties of a photosensitive member produced by applying the coating liquid. A photosensitive member for electrophotography is produced by applying a coating liquid composition for a photosensitive member for electrophotography prepared by dissolving or dispersing an organic photoconductive compound and a binder resin in a solvent, and further containing an aliphatic unsaturated hydrocarbon on an electroconductive substrate, and drying for forming a photosensitive layer on the electroconductive substrate.Type: GrantFiled: December 19, 1997Date of Patent: September 14, 1999Assignee: Sharp Kabushiki KaishaInventors: Satoshi Machino, Kazushige Morita, Kiyofumi Morimoto, Satoshi Katayama, Tomoko Kanazawa, Makoto Kurokawa