Patents by Inventor Kazuo Hokkirigawa

Kazuo Hokkirigawa 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).

  • Patent number: 11692993
    Abstract: To provide tissue paper excellent in softness and smoothness. In tissue paper that is two-ply non-moisturizing tissue paper to which no chemical solution is applied, a basis weight per sheet is 10.0 to 18.0 g/m2, the thickness of two plies is 100 to 240 ?m, a dry tensile strength in the paper horizontal direction is 70 to 180 cN/25 mm, a wet tensile strength in the paper horizontal direction is 25 to 55 cN/25 mm, and a free sensory evaluation value Ef calculated according to the following Equation 1 is 3.7 to 6.6, and a slip sensory evaluation value Es calculated according to the following Equation 2 is 5.0 to 8.2. Free sensory evaluation value Ef=?2.879×(dry tensile strength in paper horizontal direction)+6.55×(wet tensile strength in paper horizontal direction)+5.36??(Equation 1) Slip sensory evaluation value Es=?8.80×(dynamic friction coefficient)?0.41×(arithmetic mean surface roughness)+13.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: July 4, 2023
    Assignees: DAIO PAPER CORPORATION, TOHOKU UNIVERSITY
    Inventors: Shuta Yasui, Hidenori Yorozu, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata, Naoya Yamai, Risa Nakane
  • Patent number: 11384483
    Abstract: The present invention is directed to a non-moisturizing high-grade type tissue paper having excellent softness wherein the polyol applied to the two-ply tissue paper is not applied by external addition. In various embodiments, the tissue paper has a basis weight per ply of 14.0 to 17.0 g/m2, a paper thickness for two plies of 160 to 220 ?m, and a water content of 4.0 to 9.0% by mass, contains 0.15 to 0.45% by mass of an oily component to be extracted with diethyl ether, and has a bending rigidity of less than 0.006 gf·cm/cm in CD (cross direction) and a bending recovery force of less than 0.005 gf·cm/cm in CD.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: July 12, 2022
    Assignees: DAIO PAPER CORPORATION, TOHOKU UNIVERSITY
    Inventors: Sachiko Takahashi, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata
  • Publication number: 20220106740
    Abstract: To provide a non-moisturizing high-grade type tissue paper having excellent softness. The problem is solved by a 3-ply tissue paper having a basis weight of 12.0 g/m2 or more per ply, having a paper thickness of 200 to 265 ?m for three plies, having a water content of 4.0 to 9.0% by mass, containing 0.15 to 0.45% by mass of an oily component to be extracted with diethyl ether, and having a bending rigidity of less than 0.006 gf·cm/cm in CD (Cross Direction) and a bending recovery force of less than 0.005 gf·cm/cm in CD.
    Type: Application
    Filed: January 30, 2020
    Publication date: April 7, 2022
    Inventors: Noritada TOMIOKA, Minoru IWASAKI, Shuta YASUI, Sachiko TAKAHASHI, Kazuo HOKKIRIGAWA, Takeshi YAMAGUCHI, Kei SHIBATA
  • Publication number: 20210338494
    Abstract: An absorbent article includes a permeable top sheet, an impermeable back sheet, an absorbing part disposed between the top sheet and the back sheet, and a friction reducing layer disposed between the back sheet and the absorbing part. The friction between the friction reducing layer and the back sheet or the friction between the friction reducing layer and the absorbing part is less than the friction between the absorbing part and the back sheet.
    Type: Application
    Filed: July 17, 2019
    Publication date: November 4, 2021
    Inventors: Atsuko HASEZAWA, Kazuo HOKKIRIGAWA, Takeshi YAMAGUCHI, Kei SHIBATA
  • Publication number: 20210198850
    Abstract: To provide a non-moisturizing high-grade type tissue paper having excellent softness. The problem is solved by a two-ply tissue paper to which a polyol is not applied by external addition. The tissue paper has a basis weight per ply of 14.0 to 17.0 g/m2, a paper thickness for two plies of 160 to 220 ?m, and a water content of 4.0 to 9.0% by mass, contains 0.15 to 0.45% by mass of an oily component to be extracted with diethyl ether, and has a bending rigidity of less than 0.006 gf·cm/cm in CD (cross direction) and a bending recovery force of less than 0.005 gf·cm/cm in CD.
    Type: Application
    Filed: June 3, 2019
    Publication date: July 1, 2021
    Inventors: Sachiko TAKAHASHI, Kazuo HOKKIRIGAWA, Takeshi YAMAGUCHI, Kei SHIBATA
  • Publication number: 20210172925
    Abstract: To provide tissue paper excellent in softness and smoothness. In tissue paper that is two-ply non-moisturizing tissue paper to which no chemical solution is applied, a basis weight per sheet is 10.0 to 18.0 g/m2, the thickness of two plies is 100 to 240 ?m, a dry tensile strength in the paper horizontal direction is 70 to 180 cN/25 mm, a wet tensile strength in the paper horizontal direction is 25 to 55 cN/25 mm, and a free sensory evaluation value Ef calculated according to the following Equation 1 is 3.7 to 6.6, and a slip sensory evaluation value Es calculated according to the following Equation 2 is 5.0 to 8.2. Free sensory evaluation value Ef=?2.879×(dry tensile strength in paper horizontal direction)+6.55×(wet tensile strength in paper horizontal direction)+5.36??(Equation 1) Slip sensory evaluation value Es=?8.80×(dynamic friction coefficient)?0.41×(arithmetic mean surface roughness)+13.
    Type: Application
    Filed: October 29, 2018
    Publication date: June 10, 2021
    Inventors: Shuta YASUI, Hidenori YOROZU, Kazuo HOKKIRIGAWA, Takeshi YAMAGUCHI, Kei SHIBATA, Naoya YAMAI, Risa NAKANE
  • Patent number: 10570568
    Abstract: An all-purpose type tissue paper. A two-ply tissue paper that does not have moisturizer applied thereon, that has a basis weight per ply of 10.0-16.0 g/m2, a paper thickness per two-ply of 120-200 ?m, a softness of not more than 1.0, a dry tensile strength (T) in the MD direction of 240-300 cN/25 mm, and an average dynamic friction coefficient of 1.40-1.65.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: February 25, 2020
    Assignees: DAIO PAPER CORPPORATION, TOHOKU UNIVERSITY
    Inventors: Shuta Yasui, Norimitsu Hirata, Hidenori Yorozu, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata, Wataru Tanabe, Shohei Matsumura
  • Patent number: 10208833
    Abstract: [Problem] To provide a chain link which can improve wear resistance even under lubricating conditions in adhesive mode. [Solution] Steel link plates 2 for a silent chain having pinholes 22 for inserting linking pins 3 are formed. A hardened layer obtained by performing heat treatment (martempering, for example) is formed on the inner circumferential surface of the pinholes 22, and a large number of hard particles hp having the same hardness as or a greater hardness than the surface hardness of said hardened layer are dotted in a crystalline state within the martensite structure on the surface layer section of the hardened layer. The hard particles hp are an oxide, carbide or nitride of any element from Cr, V, Ti and Nb which was originally present in the steel of the link plate material.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: February 19, 2019
    Assignee: BorgWarner Inc.
    Inventors: Junichi Eda, Yasushi Miyazaki, Yukio Yoshida, Kazuo Hokkirigawa
  • Publication number: 20180258592
    Abstract: An all-purpose type tissue paper. A two-ply tissue paper that does not have moisturizer applied thereon, that has a basis weight per ply of 10.0-16.0 g/m2, a paper thickness per two-ply of 120-200 ?m, a softness of not more than 1.0, a dry tensile strength (T) in the MD direction of 240-300 cN/25 mm, and an average dynamic friction coefficient of 1.40-1.65.
    Type: Application
    Filed: August 4, 2016
    Publication date: September 13, 2018
    Applicants: DAIO PAPER CORPORATION, TOHOKU UNIVERSITY
    Inventors: Shuta YASUI, Norimitsu HIRATA, Hidenori YOROZU, Kazuo HOKKIRIGAWA, Takeshi YAMAGUCHI, Kei SHIBATA, Wataru TANABE, Shohei MATSUMURA
  • Publication number: 20170150782
    Abstract: An outsole of a shoe includes: a plurality of ridges having a tread surface to be in contact with a road surface; and at least one longitudinal groove defined between the plurality of ridges. At least in a partial area of each of a forefoot portion and a rear foot portion on a medial side of a foot, the plurality of ridges and the longitudinal groove extend in a longitudinal direction or a diagonal longitudinal direction and are set so that an angle of the ridges and that of the longitudinal groove with respect to a long axis of the outsole are in a range of 0° to 35°. A ratio of a length of the tread surface of the ridges with respect to a width of the tread surface is set to be 1.8 to 200. The width of the tread surface of the ridges is set to be greater than a width of the longitudinal groove by a factor of 2 to 100.
    Type: Application
    Filed: May 14, 2014
    Publication date: June 1, 2017
    Applicant: ASICS CORPORATION
    Inventors: Kenta Moriyasu, Tsuyoshi Nishiwaki, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata
  • Publication number: 20160153525
    Abstract: [Problem] To provide a chain link which can improve wear resistance even under lubricating conditions in adhesive mode. [Solution] Steel link plates 2 for a silent chain having pinholes 22 for inserting linking pins 3 are formed. A hardened layer obtained by performing heat treatment (martempering, for example) is formed on the inner circumferential surface of the pinholes 22, and a large number of hard particles hp having the same hardness as or a greater hardness than the surface hardness of said hardened layer are dotted in a crystalline state within the martensite structure on the surface layer section of the hardened layer. The hard particles hp are an oxide, carbide or nitride of any element from Cr, V, Ti and Nb which was originally present in the steel of the link plate material.
    Type: Application
    Filed: June 25, 2014
    Publication date: June 2, 2016
    Inventors: Junichi EDA, Yasushi MIYAZAKI, Yukio YOSHIDA, Kazuo HOKKIRIGAWA
  • Publication number: 20160083566
    Abstract: A rubber composition includes an ethylene-propylene-diene rubber, and a porous carbon particle derived from a plant material. Not less than 160 parts by mass and not more than 340 parts by mass of the porous carbon particle is included relative to 100 parts by mass of the ethylene-propylene-diene rubber. A slide member includes a cross-linked rubber body in which the rubber composition is cross-linked.
    Type: Application
    Filed: September 11, 2015
    Publication date: March 24, 2016
    Inventors: Kei TAKAHASHI, Mika HAYASHI, Kazuo HOKKIRIGAWA, Takeshi YAMAGUCHI, Kei SHIBATA
  • Patent number: 9120913
    Abstract: An elastic composite material containing a base polymer of a simple substance or a mixture of rubber or thermoplastic elastomer as a base material, and a hard porous carbon material containing carbide of defatted bran and carbide of phenolic resin. The hard porous carbon material is added in a ratio of 200 parts or more by weight relative to 100 parts by weight of the base polymer.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: September 1, 2015
    Assignee: Hitachi Metals, Ltd.
    Inventors: Kei Takahashi, Osamu Murakami, Mika Hayashi, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata
  • Publication number: 20150094399
    Abstract: An elastic composite material containing a base polymer of a simple substance or a mixture of rubber or thermoplastic elastomer as a base material, and a hard porous carbon material containing carbide of defatted bran and carbide of phenolic resin. The hard porous carbon material is added in a ratio of 200 parts or more by weight relative to 100 parts by weight of the base polymer.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Applicant: Hitachi Metals, Ltd.
    Inventors: Kei TAKAHASHI, Osamu Murakami, Mika Hayashi, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata
  • Patent number: 7306374
    Abstract: The invention provides a special type bearing device that is insusceptible to damage, is light in weight, has a long service life and excellent wear resistance, is insusceptible to the effect of change in temperature, is easy to fabricate, and has little offensiveness towards mating members. Further, the same is capable of sufficiently retaining a lubricant such as oil and grease, and retaining the lubricant for a long period of time without the need of supplying oil during operation, thereby rendering it maintenance-free. That is, the special type bearing device as described above has an axial shaft, a pair of rotating bodies fixedly attached to the shaft, and a supporting body with which the rotating bodies are in contact, wherein any one of the shift, the rotating bodies, and the supporting body is made of RB ceramic or CRB ceramic.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: December 11, 2007
    Assignee: Minebea Co., Ltd.
    Inventors: Kazuo Hokkirigawa, Rikuro Obara
  • Publication number: 20070116390
    Abstract: The invention provides a special type bearing device that is insusceptible to damage, is light in weight, has a long service life and excellent wear resistance, is insusceptible to the effect of change in temperature, is easy to fabricate, and has little offensiveness towards mating members. Further, the same is capable of sufficiently retaining a lubricant such as oil and grease, and retaining the lubricant for a long period of time without the need of supplying oil during operation, thereby rendering it maintenance-free. That is, the special type bearing device as described above has an axial shaft, a pair of rotating bodies fixedly attached to the shaft, and a supporting body with which the rotating bodies are in contact, wherein any one of the shift, the rotating bodies, and the supporting body is made of RB ceramic or CRB ceramic.
    Type: Application
    Filed: December 14, 2006
    Publication date: May 24, 2007
    Inventors: Kazuo Hokkirigawa, Rikuro Obara
  • Patent number: 7168857
    Abstract: The invention provides a special type bearing device that is insusceptible to damage, is light in weight, has a long service life and excellent wear resistance, is insusceptible to the effect of change in temperature, is easy to fabricate, and has little offensiveness towards mating members. Further, the same is capable of sufficiently retaining a lubricant such as oil and grease, and retaining the lubricant for a long period of time without the need of supplying oil during operation, thereby rendering it maintenance-free. That is, the special type bearing device as described above has an axial shaft, a pair of rotating bodies fixedly attached to the shaft, and a supporting body with which the rotating bodies are in contact, wherein any one of the shift, the rotating bodies, and the supporting body is made of RB ceramic or CRB ceramic.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: January 30, 2007
    Assignee: Minebea Co., Ltd.
    Inventors: Kazuo Hokkirigawa, Rikuro Obara
  • Patent number: 7144932
    Abstract: A synthetic resin composition includes at least one synthetic resin and RBC or CRBC particles dispersed in the resin. A method for preparing a synthetic resin composition includes mixing RBC or CRBC particles with a synthetic resin at a temperature near the melting temperature of the synthetic resin. Preferably, the method of includes the step of kneading the mixture.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: December 5, 2006
    Assignee: Minebea Co., Ltd.
    Inventors: Kazuo Hokkirigawa, Rikuro Obara
  • Patent number: 7140778
    Abstract: A resin composite for use in the manufacture of slide bearings is formed of a resin and fine particles of RBC or CRBC dispersed in the resin. The resin composite can be molded into slide bearings.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: November 28, 2006
    Assignee: Minebea Co., Ltd.
    Inventors: Kazuo Hokkirigawa, Motoharu Akiyama, Morinobu Kawamura
  • Patent number: 7132155
    Abstract: A foam-molded synthetic resin material in which a RBC or CRBC fine powder and bubbles are homogeneously dispersed. There is provided an electrically conductive molded resin material of sufficient porosity by using a fine powder of RB ceramics (RBC) or CRB ceramics (CRBC), in which a surface thereof is not covered with a skin layer while an electrically conductive material is directly bared on the surface, and a method for preparing same and uses thereof.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: November 7, 2006
    Assignee: Minebea Co., Ltd.
    Inventors: Kazuo Hokkirigawa, Motoharu Akiyama, Morinobu Kawamura