Patents Assigned to Bando Chemical Industries, Ltd.
  • HIGH LOAD TRANSMISSION V-BELT
    Publication number: 20110237377
    Abstract: In a high load transmission V-belt, a plurality of blocks 20 are attached and fixed to a tension band 10 extending in a belt length direction in a state in which each of the blocks 20 are arranged so as to sandwich an engagement section 18 of the tension band 10 in an inter-beam clearance portion 26 formed between upper and lower beam portions 23, 24. An increased amount of change ?T in dimension T of the engagement section 18 of the tension band 10 in a belt thickness direction due to thermal expansion is equal to or less than an amount of change ?G in dimension G of the inter-beam clearance portion 26 of the block 20 in the belt thickness direction while running the belt (?T??G).
    Type: Application
    Filed: November 20, 2009
    Publication date: September 29, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki Sakanaka, Mitsuhiko Takahashi
  • FRICTION DRIVE BELT
    Publication number: 20110218069
    Abstract: A friction drive belt includes: an adhesion rubber layer having a core wire embedded therein so as to form a helical pattern having a pitch in a lateral direction of the belt; a compression rubber layer provided on a surface of the adhesion rubber layer located on an inner side of the belt, and serving as a portion that is to contact pulleys, and a backing rubber layer provided on a surface of the adhesion rubber layer located on an outer side of the belt, and serving as a back portion of the belt. A ratio of tensile stress at 10% elongation of a rubber composition forming the adhesion rubber layer to that of a rubber composition forming the backing rubber layer is 1.77 or more, as measured in a longitudinal direction of the belt at an ambient temperature of 25° C. according to JIS K 6251.
    Type: Application
    Filed: October 6, 2009
    Publication date: September 8, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD
    Inventors: Eijiro Nakashima, Shigeki Okuno
  • Method for fabricating drive belt
    Patent number: 8012282
    Abstract: A method for fabricating a drive belt includes: a cylindrical rubber formation step of forming a cylindrical rubber by roundly joining an uncrosslinked rubber sheet (31); and a mold covering step of covering a cylindrical mold with the cylindrical rubber formed in the cylindrical rubber formation step. A mark hot-transfer sheet (35) is adhered by hot pressing to the juncture of the cylindrical rubber to cover the juncture on the inside of the cylindrical rubber.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: September 6, 2011
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Shinji Takahashi, Masahide Naya, Takehiro Hayashi, Kentarou Sanematsu
  • NOVEL 1,3,5-TRIS(DIARYLAMINO)BENZENE AND USE THEREOF
    Publication number: 20110186834
    Abstract: The invention provides a 1,3,5-tris(diarylamino)benzene represented by the general formula (I) in which R1 to R6 are each independently a group which is represented by the general formula (II) wherein R is independently a hydrogen atom, an alkyl group of 1 to 6 carbon atoms or a cycloalkyl group of 5 or 6 carbon atoms, m is 2, 3, 4 or 5, and n is 0, 1 or 2, provided that at least one of R1 to R6 is independently a group represented by the general formula (II) wherein R is an alkyl group of 1 to 6 carbon atoms or a cycloalkyl group of 5 or 6 carbon atoms, m is 2, 3, 4 or 5, and n is 0, 1 or 2.
    Type: Application
    Filed: August 28, 2009
    Publication date: August 4, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Masashi Ohta, Nobutaka Akashi
  • Friction drive belt and method for fabricating the same
    Patent number: 7988577
    Abstract: In a friction drive belt B, at least a contact part 13 of a belt body 10 with a pulley is made of an elastomer composition. The contact part 13 of the belt body 10 with a pulley has a large number of cellular pores 15 formed in the contact surface with the pulley.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: August 2, 2011
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Manabu Omori, Hiroyuki Shiriike, Hiroyuki Tachibana
  • METHOD AND APPARATUS FOR UPLINK SIGNAL TRANSMISSION AND CHANNEL ESTIMATION IN WIRELESS ACCESS NETWORK
    Publication number: 20110164526
    Abstract: The present invention provides a new method and apparatus, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, and the corresponding method and apparatus for channel estimation in its uplink counterpart device, wherein, a plurality of network device comprise one or more multi-antenna network devices, at least one of the multi-antenna network device transmits multipath subcarrier modulated symbols via a plurality of transmitting antennas configured for itself, wherein, at least two transmitting antennas use different subcarrier sets, but share one pilot pattern, wherein, pilot pattern used by each network device is different from the pilot pattern used by any other network device.
    Type: Application
    Filed: September 5, 2008
    Publication date: July 7, 2011
    Applicant: Bando Chemical Industries Ltd
    Inventors: Xiaolong Zhu, Yang Song
  • BELT TRANSMISSION SYSTEM AND BELT USED IN THE SYSTEM
    Publication number: 20110160014
    Abstract: In a belt transmission system A, a drive pulley 1 and at least one driven pulley 2-4 are flat pulleys, and power transmission between the pulleys is performed through a substantially flat transmission surface b1 of the power transmission belt B. This can improve transmission efficiency and durability of the power transmission belt to be comparable to those of a flat belt, while significantly reducing the cost of the system. A plurality of protrusions 82a extending in the longitudinal direction of the belt are provided on an outer surface of the belt, and are allowed to engage with circumferential grooves 5a of a restriction pulley 5, 6, thereby restricting movement of the power transmission belt in the lateral direction of the belt. This can keep the belt running stably even when rainwater etc. is adhered to the belt or the pulley.
    Type: Application
    Filed: August 26, 2009
    Publication date: June 30, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Hideaki Kawahara
  • POWER TRANSMISSION BELT
    Publication number: 20110124453
    Abstract: A power transmission belt (10) includes: a belt body (11) including a part (14) which is in contact with a flat pulley and which is made of a rubber composition containing an ethylene-?-olefin elastomer with an ethylene content of less than or equal to 60% by mass as raw rubber. The rubber composition forming the contact part (14) with the flat pulley has a storage modulus of 20-60 MPa at 25° C. and a storage modulus of 12 MPa or more at 100° C., short fibers are not blended into the rubber composition, and the grain direction of the rubber composition corresponds to a belt lengthwise direction.
    Type: Application
    Filed: July 7, 2009
    Publication date: May 26, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Eijiro Nakashima, Shigeki Okuno
  • Liquid developing electrophotographic device roller and liquid developing electrophotographic device
    Patent number: 7937026
    Abstract: An object of the present invention is to provide a liquid developing electrographic device roller suppressed in volumetric variation caused by a carrier. As a means for solving the problems, the present invention provides a liquid developing electrophotographic device roller including a shaft and an elastic material layer provided around the outer peripheral side of the shaft, wherein the elastic material layer is formed by using a polyurethane obtained by reacting a polyester polyol with a difunctional isocyanate.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: May 3, 2011
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Harushi Nagami, Hiroshi Sanda, Takayuki Nagase, Sadaharu Nakamura
  • FRICTION DRIVE BELT AND BELT TRANSMISSION SYSTEM USING THE SAME
    Publication number: 20110086735
    Abstract: A friction drive belt (B) includes a pulley contacting portion (13) which is made of a rubber composition of an ethylene-?-olefin elastomer as raw rubber in which carbon black having an iodine adsorption number of 40 mg/g or lower, and 3-10 parts by mass of short aramid fiber (14) relative to 100 parts by mass of the raw rubber are blended.
    Type: Application
    Filed: June 4, 2009
    Publication date: April 14, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Shinji Takahashi, Hisashi Matsuda
  • Power transmission belt and process for production of the same
    Patent number: 7901313
    Abstract: A power transmission belt comprises a compression rubber layer and an adhesion rubber layer both of which are formed of vulcanizate of an ethylene-a-olefin-diene rubber compound, with a preferred ethylene content of 55-85% in the compression rubber layer. A plurality of load carrying cords formed of fiber cords adhere to and embed in the adhesion rubber layer. The compression rubber layer has a modulus of elasticity in tension of a in the lengthwise direction of the belt and a modulus of elasticity in tension of b in the widthwise direction of the belt, and a and b satisfy the relationship: 0.9?a/b?1.2. The compression rubber layer may contain short fibers therein in an amount of not more than 5 parts by weight in relation to 100 parts by weight of the ethylene-a-olefin-diene rubber, used in such a manner that the fibers are oriented in the lengthwise direction of the belt.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: March 8, 2011
    Assignee: Bando Chemical Industries, Ltd.
    Inventor: Hiroyuki Shiriike
  • V-ribbed belt
    Patent number: 7896767
    Abstract: Short fibers 6a protruded from side faces 5a of rubber ribs 5 are thermal contracted by frictional heat by belt slip of the rubber rib side faces 5 on a V groove face of a pulley. This allows the short fibers 6a to be buried in rubber ribs 5.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: March 1, 2011
    Assignee: Bando Chemical Industries, Ltd.
    Inventor: Eijiro Nakashima
  • Entrance angle estimation method of V-ribbed belt, entrance angle estimation program employing the method, and pulley layout designing method
    Patent number: 7899651
    Abstract: In a method for estimating an entrance angle of a V-ribbed belt from a flat pulley to a V-ribbed pulley, the entrance angle is estimated easily at a stage of pulley layout design. The V-ribbed belt 10 forms a track which enters at an entrance angle of approximately zero degree (substantially perpendicular to a plane that includes an axis 3a of rotation) into the flat pulley 3, is wound along the outer peripheral face of the flat pulley 3 without deviating in the axial direction thereof, and extends substantially linearly from a winding end point c at the flat pulley 3 to a winding start point d at a drive pulley 1. The entrance angle ? of the V-ribbed belt 10 from the flat pulley 3 to the drive pulley 1 is obtained on the basis of the track of the V-ribbed belt by, for example, a three-dimensional CAD or the like.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: March 1, 2011
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Hiroyoshi Takahashi, Eijiro Nakashima, Hideaki Kawahara
  • HIGH LOAD DRIVE V-BELT
    Publication number: 20110028258
    Abstract: The present invention aims at improving the shock resistance of a block while reducing the noise of a belt running. A high-load drive V-belt B includes: at least one tension band 10 extending in an endless loop; and a plurality of blocks 20 engaged and secured to the tension band 10 at a predetermined pitch in a belt length direction of the tension band 10, wherein each of the plurality of blocks 20 includes a contact surface 30 to be in contact with a pulley on each of opposite end portions of the block 20 in a belt width direction, each of the plurality of blocks 20 includes a slope 31 formed so as to be continuous with a belt inner side of the contact surface 30 and inclined toward a center in the belt width direction with respect to the contact surface 30, and an angle of the slope 31 with respect to the contact surface 30 is 120 degrees or more and 140 degrees or less.
    Type: Application
    Filed: August 1, 2008
    Publication date: February 3, 2011
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Kouhei Sano, Hiroyuki Sakanaka
  • FRICTION DRIVE BELT
    Publication number: 20100331129
    Abstract: A friction drive belt for transmitting power while being wound around a pulley such that a compression rubber layer provided on an inner periphery of a belt body is in contact with the pulley enables both of noise reduction during the run of the belt and greater durability. A plurality of pores 15 having an average size of 5-120 ?m are formed in the compression rubber layer 12 such that the compression rubber layer 12 has an air content of 5-40%.
    Type: Application
    Filed: February 10, 2009
    Publication date: December 30, 2010
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Fumihiro Mukai, Tomoyuki Yamada, Hiroyuki Tachibana, Hiroyuki Shiriike
  • FRICTION TRANSMISSION BELT
    Publication number: 20100298079
    Abstract: In a friction transmission belt in which a compression rubber layer provided to an inner circumferential side of the belt body is wrapped over pulleys such that the compression rubber layer contacts the pulleys, such a configuration that both of a noise reduction and durability while the belt is running can be achieved is obtained. The compression rubber layer is configured so as not to include short fibers and so as to have a surface roughness, i.e., an Ra of at least a pulley contact surface of the compression rubber layer equal to or more than 3 ?m.
    Type: Application
    Filed: January 23, 2009
    Publication date: November 25, 2010
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki Shiriike, Tomoyuki Yamada, Hiroyuki Tachibana, Fumihiro Mukai
  • Rubber Composition and Rubber Belt
    Publication number: 20100240809
    Abstract: An object is to provide a rubber composition that is capable of significantly improving mechanical properties. Another object is to provide a rubber belt that has excellent mechanical properties. Provided are a rubber composition, and a rubber belt formed by using the rubber composition, which is incorporated with a rubber component containing an ethylene/?-olefin copolymer, and an organically treated clay mineral organically treated with an organic ammonium ion, wherein the ethylene content of the ethylene/?-olefin copolymer is in a range of 60-85% by mass, the rubber component has a Mooney viscosity of 10-55 at 125° C., and the organically treated clay mineral is incorporated in 6-30 parts by mass per 100 parts by mass of the rubber component.
    Type: Application
    Filed: October 27, 2008
    Publication date: September 23, 2010
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Tomoyuki Yamada
  • Belt drive system
    Patent number: 7780556
    Abstract: A belt drive system including an assembly of a heavy-duty drive V-belt 5 and pulleys 2 and 4 reduces noise generating owing to belt travel while ensuring the durability of the pulleys 2 and 4. The surfaces of belt grooves 6 in the V-pulleys 2 and 4 are micro-blasted or burnished so that their surface roughness satisfies the relational expression y??0.9×tp+100, where tp is the load length rate at a given position of a roughness curve indicating the surface features of the groove surfaces in the V-pulleys 2 and 4 and y is the variable (the degree of height) indicating by percentage the ratio of the height from the lowest valley having a maximum depth to the given position to a maximum height Ry.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: August 24, 2010
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Hiroyuki Sakanaka, Mitsuhiko Takahashi
  • FRICTION DRIVE BELT AND AUTOMOTIVE ACCESSORY DRIVE BELT TRANSMISSION SYSTEM USING THE SAME
    Publication number: 20100203994
    Abstract: A friction drive belt (B) includes short fibers (14) and carbon black (18) both scattered so as to be exposed at a surface of at least a contact part (13) of a rubber belt body (10) with a pulley. The short fibers (14) include short, high modulus fibers made of polymers having a main chain which does not contain an aromatic compound and having an initial tensile resistance, measured according to JIS L 1013, of equal to or greater than 100 cN/dtex, and the carbon black (18) contain large-particle-diameter carbon black having an iodine absorption, measured according to JIS K 6217-1, of equal to or less than 40 g/Kg, and/or a specific surface area, measured by nitrogen adsorption according to JIS K 6217-2, of equal to or less than 40 m2/g.
    Type: Application
    Filed: July 4, 2008
    Publication date: August 12, 2010
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Tomoyuki Fujikawa, Shigeki Okuno, Eijiro Nakashima
  • V-RIBBED BELT
    Publication number: 20100203993
    Abstract: Provided is a V-ribbed belt that can suppress generation of slippage when it is splashed with water, and generation of noise. A V-ribbed belt has a rib-forming surface with plural rows of ribs formed therein and extending in a belt longitudinal direction to allow the rib-forming surface to be brought into contact with pulleys when in use, wherein the V-ribbed belt has reentrant portions on the rib-forming surface to form a non-contact area that is held out of contact with the pulleys when the V-ribbed belt is driven, so that water is allowed to flow into the non-contact area when the V-ribbed belt is splashed with water.
    Type: Application
    Filed: February 15, 2008
    Publication date: August 12, 2010
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Hirokazu Matsukawa, Hiroyuki Shiriike