Patents by Inventor Hiroshi Onda
Hiroshi Onda 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: 10751707Abstract: The present disclosure provides a photocatalyst filter that can efficiently decompose and eliminate ozone gas or VOC and has a low ventilation resistance. The photocatalyst filter includes a sheet-like filter substrate and a photocatalyst layer supported by the filter substrate. The photocatalyst layer exhibits a photocatalytic action by receiving light having a wavelength of 400 nm or more. The photocatalyst filter has an aperture ratio of 35% or more and 80% or less.Type: GrantFiled: June 23, 2017Date of Patent: August 25, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Yasuhiro Shibai, Hiroshi Onda, Tomoya Tsutsumino
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Publication number: 20180001312Abstract: The present disclosure provides a photocatalyst filter that can efficiently decompose and eliminate ozone gas or VOC and has a low ventilation resistance. The photocatalyst filter includes a sheet-like filter substrate and a photocatalyst layer supported by the filter substrate. The photocatalyst layer exhibits a photocatalytic action by receiving light having a wavelength of 400 nm or more. The photocatalyst filter has an aperture ratio of 35% or more and 80% or less.Type: ApplicationFiled: June 23, 2017Publication date: January 4, 2018Inventors: Yasuhiro SHIBAI, Hiroshi ONDA, Tomoya TSUTSUMINO
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Patent number: 8232033Abstract: A toner, a developer, a two-component developer, a developing device and an image forming apparatus are provided. In the image forming apparatus, images are formed with a developer that fills a developing tank of the developing device. The developer includes the toner containing at least a binder resin, a colorant, and a release agent, the release agent having an acid value of less than 4 mgKOH/g and in which an amount of the release agent exposed on a surface of toner is 0.5% by weight or more and 2.5% by weight or less of a total amount of the toner.Type: GrantFiled: February 20, 2009Date of Patent: July 31, 2012Assignee: Sharp Kabushiki KaishaInventors: Yoritaka Tsubaki, Hiroshi Onda, Yasuo Imura
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Patent number: 8168363Abstract: A toner is so configured as to satisfy the following conditions: (b)/(a) is from 0.90 to 1.02, (a) is from 140 to 150 and the average value in the entire toner particles of a shape factor SF-2 of the toner particles is larger than 140, where (a) represents a shape factor SF-2 showing the degree of irregularity on the surface of toner particles having a particle size D75V or less which is a particle size at which a cumulative volume from a large particle size side in particle size distribution by volume is 75%, and (b) represents a shape factor SF-2 of toner particles having a particle size D25V or more which is a particle size at which a cumulative volume from a large particle size side in particle size distribution by volume is 25%.Type: GrantFiled: January 9, 2009Date of Patent: May 1, 2012Assignee: Sharp Kabushiki KaishaInventors: Yasuo Imura, Hiroshi Onda, Yoritaka Tsubaki, Saori Yamada
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Patent number: 8148040Abstract: In a toner at least containing a binder resin and a colorant, a value obtained by dividing a particle size D50p by a particle size D84p is 1.43 or more and 1.64 or less, wherein D50p and D84p respectively represent particle sizes at 50% and 84% of cumulative number counted from a large-size side in a cumulative number distribution. Further, in the toner, an average degree of circularity of toner particles having a volume average particle size of 1 ?m or more and 4 ?m or less is 0.940 or more and 0.960 or less. Further, in the toner, a content of toner particles having an average degree of circularity of 0.850 or less is 10% by number or less among the toner particles having a volume average particle size of 1 ?m or more and 4 ?m or less.Type: GrantFiled: June 27, 2008Date of Patent: April 3, 2012Assignee: Sharp Kabushiki KaishaInventors: Yoshinori Yamamoto, Hiroshi Onda, Saori Yamada, Yoshiaki Akazawa
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Patent number: 8129085Abstract: A toner includes toner particles containing at least binder resin and colorant. The toner particles contain a large-sized toner particle group of particles and a small-sized toner particle group of particles having a volume average particle size smaller than that of the large-sized toner particle group. In the toner, a volume average particle size D50v is 4 ?m to 8 ?m at 50% in accumulated volume counted from a large particle-side in accumulated volume distribution of entire toner particles; a content of toner particles contained in a toner particle group having a volume average particle size of 7 ?m or more is 24% to 47% by volume based on the entire toner particles; and a content of toner particles contained in a toner particle group having a number average particle size of 5 ?m or less is 10% to 50% by number or less based on the entire toner particles.Type: GrantFiled: July 23, 2008Date of Patent: March 6, 2012Assignee: Sharp Kabushiki KaishaInventors: Yoshinori Yamamoto, Hiroshi Onda, Yoshiaki Akazawa
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Patent number: 7974818Abstract: A solidification analysis method of a cast that can predict a molten temperature drop history with fine precision is disclosed. The analysis is performed by considering different latent heat emitting patterns according to the differences of the cooling speeds. An analysis model having a plurality of elements is used. A cooling speed is calculated in each element by performing a calculation of heat transfer between the elements adjacent to each other. A temperature fluctuation range is revised in each element when a temperature fluctuates from emission of solidification latent heat based on the calculated cooling speed and a predetermined fraction solid-temperature curve of a molten alloy. A solidification analysis of the analysis model is performed by using the revised temperature fluctuation range.Type: GrantFiled: January 11, 2008Date of Patent: July 5, 2011Assignee: Nissan Motor Co., Ltd.Inventors: Kazunari Sakurai, Hiroshi Onda
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Patent number: 7820351Abstract: An image forming apparatus for forming images with a toner and includes an image forming section, a paper feeding section and an image reading section, in which the non-magnetic toner is as follows: the particle size D10V and the particle size D90V of the toner satisfy the following formula (1), the particle size D50V is from 5 to 8 ?m, and the content of the toner particles having a particle size of at most 5 ?m is from 15 to 35% by number: 0.415?(D10V?D90V)/D10V?0.475??(1) wherein D10V, D50V and D90V each are a particle size where a cumulative volume from the large particle size side in the cumulative volume distribution of the toner particles reaches 10%, 50% and 90%, respectively.Type: GrantFiled: December 27, 2006Date of Patent: October 26, 2010Assignee: Sharp Kabushiki KaishaInventors: Masao Suzuki, Yoshiaki Akazawa, Hiroshi Onda, Satoshi Ogawa, Yoshinori Yamamoto
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Patent number: 7620351Abstract: A developing device comprises a stirring roller 7 having stirring blades 7a for stirring a developer, a developing roller 3 for transferring the developer to an electrostatic latent image, a control member 4 for controlling the amount of developer transferred from the developing roller 3 to the electrostatic latent image, a reflux plate 6 by which the excess developer resulting from control by the control member 4 is flowed back to the stirring roller 7, one end portion of the reflux plate 6 being disposed in the vicinity of the outer periphery of the stirring roller 7, part of the developer stirred by the stirring roller 7 flying toward the reflux plate 6, wherein said one end portion of the reflux plate 6 is disposed at a position remote from the stirring roller 7 over a distance greater then the maximum fly distance of the developer provided by rotation of the stirring roller 7.Type: GrantFiled: September 7, 2004Date of Patent: November 17, 2009Assignee: Sharp Kabushiki KaishaInventors: Hiroshi Onda, Toshio Nishino, Syohji Tomita, Takeshi Wakabayashi, Hiroshi Ishii
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Publication number: 20090214264Abstract: A toner, a developer, a two-component developer, a developing device and an image forming apparatus are provided. In the image forming apparatus, images are formed with a developer that fills a developing tank of the developing device. The developer includes the toner containing at least a binder resin, a colorant, and a release agent, the release agent having an acid value of less than 4 mgKOH/g and in which an amount of the release agent exposed on a surface of toner is 0.5% by weight or more and 2.5% by weight or less of a total amount of the toner.Type: ApplicationFiled: February 20, 2009Publication date: August 27, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Yoritaka Tsubaki, Hiroshi Onda, Yasuo Imura
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Publication number: 20090180809Abstract: A toner is so configured as to satisfy the following conditions: (b)/(a) is from 0.90 to 1.02, (a) is from 140 to 150 and the average value in the entire toner particles of a shape factor SF-2 of the toner particles is larger than 140, where (a) represents a shape factor SF-2 showing the degree of irregularity on the surface of toner particles having a particle size D75V or less which is a particle size at which a cumulative volume from a large particle size side in particle size distribution by volume is 75%, and (b) represents a shape factor SF-2 of toner particles having a particle size D25V or more which is a particle size at which a cumulative volume from a large particle size side in particle size distribution by volume is 25%.Type: ApplicationFiled: January 9, 2009Publication date: July 16, 2009Inventors: Yasuo Imura, Hiroshi Onda, Yoritaka Tsubaki, Saori Yamada
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Patent number: 7524600Abstract: Provided is a toner not undergoing the effect of change of temperature and humidity, with high charging stability and having good fixing property and releasability. This is an electrophotographic toner containing at least a binder resin, a colorant, a charge controller and a wax in which the binder resin comprises a polyester resin having an aromatic alcohol ingredient, the charge controller comprises an organic bentonite and the wax comprises a non-polar paraffin wax.Type: GrantFiled: February 7, 2006Date of Patent: April 28, 2009Assignee: Sharp Kabushiki KaishaInventors: Tomoko Toizumi, Yoshiaki Akazawa, Satoshi Ogawa, Masao Suzuki, Akio Matsumoto, Hiroshi Onda, Kiyoshi Toizumi, Toshihisa Ishida, Tadayuki Sawai, Kouji Kida, Tohru Nishikawa, Masahiko Kubo
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Publication number: 20090029280Abstract: A toner includes toner particles containing at least binder resin and colorant. The toner particles contain a large-sized toner particle group of particles and a small-sized toner particle group of particles having a volume average particle size smaller than that of the large-sized toner particle group. In the toner, a volume average particle size D50v is 4 ?m to 8 ?m at 50% in accumulated volume counted from a large particle-side in accumulated volume distribution of entire toner particles; a content of toner particles contained in a toner particle group having a volume average particle size of 7 ?m or more is 24% to 47% by volume based on the entire toner particles; and a content of toner particles contained in a toner particle group having a number average particle size of 5 ?m or less is 10% to 50% by number or less based on the entire toner particles.Type: ApplicationFiled: July 23, 2008Publication date: January 29, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Yoshinori YAMAMOTO, Hiroshi ONDA, Yoshiaki AKAZAWA
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Publication number: 20090004590Abstract: in a toner at least containing a binder resin and a colorant, a value obtained by dividing a particle size D50p by a particle size D84p is 1.43 or more and 1.64 or less, wherein D50p and D84p respectively represent particle sizes at 50% and 84% of cumulative number counted from a large-size side in a cumulative number distribution. Further, in the toner, an average degree of circularity of toner particles having a volume average particle size of 1 ?m or more and 4 ?m or less is 0.940 or more and 0.960 or less. Further, in the toner, a content of toner particles having an average degree of circularity of 0.850 or less is 10% by number or less among the toner particles having a volume average particle size of 1 ?m or more and 4 ?m or less.Type: ApplicationFiled: June 27, 2008Publication date: January 1, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Yoshinori Yamamoto, Hiroshi Onda, Saori Yamada, Yoshiaki Akazawa
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Patent number: 7421216Abstract: A target specified range of a toner density is correctly set so that a toner density is consistently appropriately controlled. If a specified range within which a measured toner density TD (%) should fall is set based on an expression (2) below using a volume average diameter Dcav_vol (?m) of a magnetic carrier and a volume average diameter Dtav_vol (?m) of a toner, the target specified range can be correctly set, thereby making it possible to consistently appropriately control the toner density.Type: GrantFiled: October 29, 2004Date of Patent: September 2, 2008Assignee: Sharp Kabushiki KaishaInventors: Hiroshi Onda, Syohji Tomita, Hiroshi Ishii
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Patent number: 7406280Abstract: A device including a developing roller having a magnet roller for transporting developer, and developing an electrostatic latent image, a regulating member regulating transportation amount of the developer transported to the electrostatic latent image with the development roller, and a reflux plate refluxing excess developer regulated by the regulating member away from the regulating member is constructed to comprise a rubbing member arranged to face the developing roller, at a second gap larger than a first gap defined by the developing roller and the regulating member, and rubbing developer transported to the first gap. The rubbing member carries out preliminary electrification on developer and then the regulating member carries out main electrification on the preliminarily electrified developer.Type: GrantFiled: September 7, 2004Date of Patent: July 29, 2008Assignee: Sharp Kabushiki KaishaInventors: Syohji Tomita, Toshio Nishino, Hiroshi Onda, Takeshi Wakabayashi, Hiroshi Ishii
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Publication number: 20080169074Abstract: A solidification analysis method of a cast that can predict a molten temperature drop history with fine precision is disclosed. The analysis is performed by considering different latent heat emitting patterns according to the differences of the cooling speeds. An analysis model having a plurality of elements is used. A cooling speed is calculated in each element by performing a calculation of heat transfer between the elements adjacent to each other. A temperature fluctuation range is revised in each element when a temperature fluctuates from emission of solidification latent heat based on the calculated cooling speed and a predetermined fraction solid-temperature curve of a molten alloy. A solidification analysis of the analysis model is performed by using the revised temperature fluctuation range.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazunari Sakurai, Hiroshi Onda
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Patent number: 7366447Abstract: Flanges are pressed into opposite ends of a photoreceptor drum. A noncontact charging roller is arranged so as to face, but have no direct contact with, the photoreceptor drum. On both end portions of the noncontact charging roller, spacers are provided for maintaing a gap between the photoreceptor drum and the noncontact charging roller. The spacers are of tape form and wound around the noncontact charging roller. Winding positions of the spacers are distant by more than an effective projection length of each of the flanges from respective opposite ends of the charging roller.Type: GrantFiled: March 10, 2004Date of Patent: April 29, 2008Assignee: Sharp Kabushiki KaishaInventors: Takashi Mukai, Syohji Tomita, Hiroshi Onda, Atsuyuki Katoh, Hiroshi Ishii, Yoshinobu Okumura
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Publication number: 20080070145Abstract: There is provided a toner which exhibits a quick rise of charging and excellent cleaning property and which can form high-quality images having high definition and high density. A toner envelope degree of the toner falls in a range of from 2.0 to 3.0, which degree is obtained by calculation of [(L1?L2)/L2]×100 wherein L1 represents a circumference length of a projection image of toner particles containing binder resin and a colorant, and L2 represents a length of envelope of the projection image of the toner particles.Type: ApplicationFiled: September 14, 2007Publication date: March 20, 2008Inventors: Hiroshi Onda, Yoshinori Yamamoto, Masao Suzuki
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Publication number: 20070148580Abstract: An image forming apparatus for forming images with a toner and includes an image forming section, a paper feeding section and an image reading section, in which the non-magnetic toner is as follows: the particle size D10V and the particle size D90V of the toner satisfy the following formula (1), the particle size D50V is from 5 to 8 ?m, and the content of the toner particles having a particle size of at most 5 ?m is from 15 to 35% by number: 0.415?(D10V?D90V)/D10V?0.475??(1) wherein D10V, D50V and D90V each are a particle size where a cumulative volume from the large particle size side in the cumulative volume distribution of the toner particles reaches 10%, 50% and 90%, respectively.Type: ApplicationFiled: December 27, 2006Publication date: June 28, 2007Applicant: SHARP KABUSHIKI KAISHAInventors: Masao Suzuki, Yoshiaki Akazawa, Hiroshi Onda, Satoshi Ogawa, Yoshinori Yamamoto