Patents Assigned to Yamauchi Corporation
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Publication number: 20130052416Abstract: A stopper for a magnetic head is capable of coming into contact with a locking portion formed on an arm having a magnetic head, has surface roughness (Rz) of at least 1 ?m and not more than 6.5 ?m, and is made of a polyurethane-based elastomer composition. This polyurethane-based elastomer preferably contains a polyurethane elastomer consisting of diisocyanate and adipate-based polyol.Type: ApplicationFiled: August 27, 2012Publication date: February 28, 2013Applicant: Yamauchi CorporationInventor: Takamitsu WADA
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Patent number: 8192584Abstract: A papermaking belt 10 includes: a base material layer 11 including longitudinal and lateral yarns; a back-surface-side resin layer 12 which is provided on a back surface side of the base material layer, and at least a part of which has impregnated into the base material layer from the back surface side of the base material layer; a first resin layer 13 which has a relatively low viscosity, and has impregnated into the base material layer 11 from a front surface side of the base material layer 11; and a second resin layer 14 which contains chopped fibers 15 in a dispersed state, has a higher viscosity than that of the first resin layer 13, and is provided on a front surface side of the first resin layer 13.Type: GrantFiled: December 12, 2007Date of Patent: June 5, 2012Assignee: Yamauchi CorporationInventor: Tetsuya Murakami
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Patent number: 8192585Abstract: A press belt 20 includes a multiplicity of drain grooves 21 extending along a belt travel direction, lands 22 located between adjacent drain grooves 21, and auxiliary grooves 23 located on the lands 22 and extending along the belt travel direction. A transverse sectional area of each auxiliary groove 23 is smaller than that of each drain groove 21.Type: GrantFiled: December 12, 2007Date of Patent: June 5, 2012Assignee: Yamauchi CorporationInventors: Keiji Nakagawa, Tetsuya Murakami
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Publication number: 20120058365Abstract: A ceramic-resin composite roll (1) comprises a metal roll core (2), a foundation layer (3) formed on the outer circumferential surface of the metal roll core (2) and a thermally sprayed ceramic film (4) formed on the outer circumferential surface of the foundation layer (3). The thermally sprayed ceramic film (4) includes a ceramic particle layer in which adjacent ceramic particles are fused and bonded to each other and a layer of a resin (6) penetrating into the spaces among the ceramic particles (5) from the surface of the ceramic particle layer to the surface of the foundation layer (3).Type: ApplicationFiled: November 16, 2011Publication date: March 8, 2012Applicant: Yamauchi CorporationInventor: Hiroya SHIMAZAKI
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Patent number: 7897527Abstract: A cushioning pad for hot press is a laminated plate body comprising a rubber layer, a high elastic modulus reinforced layer, and a low elastic modulus reinforced layer. The rubber layer is sandwiched between the high elastic modulus reinforced layer and the low elastic modulus reinforced layer positioned on its opposite side, and the laminated body has entirely no airspace.Type: GrantFiled: July 13, 2005Date of Patent: March 1, 2011Assignee: Yamauchi CorporationInventor: Akira Yoshida
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Publication number: 20100316864Abstract: A hot press cushioning pad 1 has a fiber-rubber composite material layer formed by a woven fabric and a rubber impregnated in the woven fabric. The warp of the woven fabric is a doubled and twisted yarn, and the weft thereof is a texturized yarn made of glass fibers. The fiber-rubber composite material layer has voids inside.Type: ApplicationFiled: November 22, 2007Publication date: December 16, 2010Applicant: Yamauchi CorporationInventor: Akira Yoshida
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Publication number: 20100251908Abstract: A hot-press cushioning member 11a is configured so that an amount of compressed thickness deformation (a) is obtained by subtracting a compressed thickness (H2) of the hot-press cushioning member under a predetermined press-forming pressure from an initial thickness (H1), an amount of restored thickness deformation (b) is obtained by subtracting the compressed thickness (H2) from an uncompressed thickness (H3) of the hot-press cushioning member with the press-forming pressure released, and the (a:b) ratio ranges from 1:1 to 1:0.8.Type: ApplicationFiled: December 1, 2008Publication date: October 7, 2010Applicant: Yamauchi CorporationInventor: Akira Yoshida
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Patent number: 7704350Abstract: A press belt (2) comprises both-end corresponding regions B positioned so as to correspond to both ends of a press roll (1) or a press shoe (3) in a width direction and having a small thickness and a center region A positioned between the both-end corresponding regions B and having a thickness larger than that of the both-end corresponding region B.Type: GrantFiled: September 1, 2004Date of Patent: April 27, 2010Assignee: Yamauchi CorporationInventors: Takahisa Hikita, Atsuo Watanabe
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Publication number: 20100089543Abstract: A papermaking belt 10 includes: a base material layer 11 including longitudinal and lateral yarns; a back-surface-side resin layer 12 which is provided on a back surface side of the base material layer, and at least a part of which has impregnated into the base material layer from the back surface side of the base material layer; a first resin layer 13 which has a relatively low viscosity, and has impregnated into the base material layer 11 from a front surface side of the base material layer 11; and a second resin layer 14 which contains chopped fibers 15 in a dispersed state, has a higher viscosity than that of the first resin layer 13, and is provided on a front surface side of the first resin layer 13.Type: ApplicationFiled: December 12, 2007Publication date: April 15, 2010Applicant: Yamauchi CorporationInventor: Tetsuya Murakami
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Patent number: 7671133Abstract: A vulcanized fluoro rubber is provided by vulcanizing a composition comprising 100 parts by mass of mixture in which a raw fluoro rubber (A) in which appropriate amount of vulcanizing agent has been previously compounded and a raw fluoro rubber (B) in which the vulcanizing agent is not compounded are mixed at a rate of 8/2 to 3/7, 1 to 10 parts by mass of an acid acceptor and 0 to 5 parts by mass of another compounding agent which is compounded as needed. Number average molecular weight of each of the raw fluoro rubber (A) and the raw fluoro rubber (B) is 3.5×104 to 2.0×105.Type: GrantFiled: May 20, 2004Date of Patent: March 2, 2010Assignee: Yamauchi CorporationInventor: Akira Yoshida
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Publication number: 20100032121Abstract: A press belt 20 includes a multiplicity of drain grooves 21 extending along a belt travel direction, lands 22 located between adjacent drain grooves 21, and auxiliary grooves 23 located on the lands 22 and extending along the belt travel direction. A transverse sectional area of each auxiliary groove 23 is smaller than that of each drain groove 21.Type: ApplicationFiled: December 12, 2007Publication date: February 11, 2010Applicant: Yamauchi CorporationInventors: Keiji Nakagawa, Tetsuya Murakami
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Patent number: 7611608Abstract: A press belt having superior cracking resistance, wear resistance and pressure deflection resistance and an excellent traveling property and a method of manufacturing the same as well as a shoe press employing the same are provided. A press belt in a press comprising a rotatively traveling endless press belt and pressing means, including terminal corresponding areas (B, B?) corresponding to both ends of the pressing means in the cross direction and a central area (A) located between the terminal corresponding areas and mainly composed of thermosetting polyurethane obtained from a thermosetting polyurethane material containing a phenylene isocyanate derivative having an isocyanate group (NCO) on an end and a hardener having an active hydrogen group (H) on an end with the equivalent ratio (H/NCO) between the active hydrogen group and the isocyanate group set relatively high on the terminal corresponding areas and relatively low on the central area and a method of manufacturing the same.Type: GrantFiled: August 4, 2004Date of Patent: November 3, 2009Assignee: Yamauchi CorporationInventor: Takahisa Hikida
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Patent number: 7540942Abstract: A press belt (2) comprises many drain grooves (13) extending along a belt travel direction, and many lands (14) positioned between the adjacent drain grooves and extending along the belt travel direction. The land (14) has an upper surface which is entirely curved upward as a transverse sectional configuration along a belt width direction.Type: GrantFiled: September 13, 2004Date of Patent: June 2, 2009Assignee: Yamauchi CorporationInventor: Takahisa Hikita
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Patent number: 7527583Abstract: A paper machine press roll comprises a core roll and a ceramics sprayed film formed on an outer periphery of the core roll, in which values of Rk and Vo which are characteristic evaluation parameters of a plateau-structure surface of the ceramics sprayed film are Rk?8.0 ?m and Vo?0.030 mm3/cm2. (Vo=(100?Mr2)×Rvk/2000 (mm3/cm2) where Rk, Mr2 and Rvk are a core level difference, a core load length ratio and a projecting valley depth, respectively which are defined in JIS B0671-2-2002 (ISO13565-2-1996).Type: GrantFiled: March 21, 2005Date of Patent: May 5, 2009Assignee: Yamauchi CorporationInventor: Atsuo Watanabe
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Publication number: 20090068405Abstract: A ceramic-resin composite roll (1) comprises a metal roll core (2), a foundation layer (3) formed on the outer circumferential surface of the metal roll core (2) and a thermally sprayed ceramic film (4) formed on the outer circumferential surface of the foundation layer (3). The thermally sprayed ceramic film (4) includes a ceramic particle layer in which adjacent ceramic particles are fused and bonded to each other and a layer of a resin (6) penetrating into the spaces among the ceramic particles (5) from the surface of the ceramic particle layer to the surface of the foundation layer (3).Type: ApplicationFiled: February 19, 2007Publication date: March 12, 2009Applicant: Yamauchi CorporationInventor: Hiroya Shimazaki
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Patent number: 7501044Abstract: A paper making elastic belt has a drainage channels in a surface. A surface roughness of a wall of the drainage channel is not more than 2.0 ?m in arithmetic average roughness (Ra).Type: GrantFiled: November 29, 2005Date of Patent: March 10, 2009Assignee: Yamauchi CorporationInventors: Takahisa Hikida, Keiji Nakagawa, Hiroyuki Yasukawa
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Publication number: 20090050283Abstract: A press belt 2 comprises both end corresponding regions B positioned so as to correspond to both ends of a press roll 1 or a pressing shoe 3 in the width direction and a center region A positioned between the both end corresponding regions B. The center region A has a predetermined thickness and constitutes a pressed part pressed by pressing means. The end corresponding regions B have a thickness smaller than that of the center region A to form recessed parts and constitute pressure escape parts for allowing the pressure from the pressing means to escape.Type: ApplicationFiled: February 27, 2006Publication date: February 26, 2009Applicant: Yamauchi CorporationInventor: Takahisa Hikida
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Patent number: 7384517Abstract: A press belt with occurrence of pinholes remarkably reduced as well as a manufacturing method of the press belt are provided. The press belt includes a reinforcing base material containing multifilaments that are impregnated with a bundling agent and an elastic material in which the reinforcing base material is buried. The manufacturing method is a method of manufacturing the aforementioned press belt. The reinforcing base material is preferably made of a woven fabric and the bundling agent preferably contains as its main component thermosetting resin. As the bundling agent, a bundling agent containing as its main component urethane-based resin is suitably used. For the reinforcing base material, organic fibers are preferably used. The bundling agent is preferably applied in the form of emulsion to the multifilaments or the reinforcing base material.Type: GrantFiled: December 22, 2004Date of Patent: June 10, 2008Assignee: Yamauchi CorporationInventors: Atsushi Watanabe, Takahisa Hikida
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Patent number: 7374641Abstract: A papermaking belt, used for a shoe pressing belt, a calender belt and a sheet transfer belt, is prevented from cracking and inhibited from growth of a crack, and comprises a reinforcing substrate (6) embedded in a thermosetting polyurethane layer (7) so that the said reinforcing substrate (6) and the said thermosetting polyurethane layer (7) are integrated with each other and the outer peripheral surface and the inner peripheral surface of the belt are formed by polyurethane layers, the polyurethane layer forming the outer peripheral surface is made of a composition containing a urethane prepolymer having isocyanate groups on ends and a hardener containing dimethylthiotoluenediamine.Type: GrantFiled: May 3, 2006Date of Patent: May 20, 2008Assignee: Yamauchi CorporationInventors: Atsuo Watanabe, Takahisa Hikida, Atsushi Watanabe
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Patent number: 7326321Abstract: In a shoe press belt (11; 21; 31; 41; 51; 61) endlessly formed by an elastic material, a plurality of drains (15; 25; 35; 45; 55; 65) are formed on the outer peripheral surface of the shoe press belt along the peripheral direction of the shoe press belt, and the depths of these drains are progressively increased from a central pressurizing portion (C1; C2; C3; C4; C5) toward end pressurizing portions (A1, A1?; A2, A2?; A3, A3?; A4, A4?; A5, A5?) of the shoe press belt. A shoe press employing this shoe press belt. Thus, a shoe press belt capable of uniformly dehydrating the overall wet web and a shoe press employing the same can be provided.Type: GrantFiled: April 3, 2003Date of Patent: February 5, 2008Assignee: Yamauchi CorporationInventor: Takahisa Hikida