公开(公告)号：AU2002366307A1

公开(公告)日：2003-06-30

申请号：AU2002366307

申请日：2002-12-16

Applicant: BRIDGESTONE CORP

Inventor： ISAYAMA KENICHI ,  TANAKA RYUTA

IPC: C08G18/06 ,  C08G18/48 ,  C08G18/61 ,  C08G18/76 ,  C08G18/79 ,  G03G15/02 ,  C08J9/12 ,  G03G15/00 ,  G03G15/08 ,  G03G15/16 ,  G03G21/00

Abstract: The present invention provides a method for manufacturing a polymer foam suitable for various members for image-forming devices such as copying machines, facsimile machines, and printers and also provides a member, including a polymer foam manufactured by the method, for image-forming devices and a device, including the member, for forming an image. In a step of forming the polymer foam by allowing a polymer feedstock to foam and curing the feedstock, gas of which the solubility decreases with an increase in temperature is dissolved in the polymer feedstock, which is then heated, whereby the feedstock is allowed to foam and cured. Therefore, the polymer foam has a microcellular surface structure. Furthermore, a high-quality member, having superior surface properties, for image-forming devices can be achieved, and a device for forming an image can be achieved.

公开(公告)号：JP2009093019A

公开(公告)日：2009-04-30

申请号：JP2007264831

申请日：2007-10-10

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： MACHIDA KUNIO ,  SUZUKI TAKAHIRO ,  TANAKA RYUTA

IPC: G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide a conductive endless belt, which can be manufactured without using a solvent, obtained inexpensively and has transfer performance, gloss and durability equivalent to those of the conventional polyimide belt.
SOLUTION: The conductive endless belt used for an image forming apparatus has layered structure equipped with at least a base layer 101 and a surface layer 102 successively from an inner side, and a difference between a surface resistance value measured from the surface layer 102 side and a surface resistance value measured from the base layer 101 side is within four orders of magnitude.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供可以廉价地获得并且具有与传统聚酰亚胺带的转印性能，光泽和耐用性相当的转印性能，光泽和耐久性的可以不使用溶剂制造的导电环形带。 解决方案：用于图像形成装置的导电环形带具有从内侧连续至少配置有基底层101和表面层102的层状结构，并且从表面层测量的表面电阻值之间的差异 102侧，从基底层101侧测得的表面电阻值在四个数量级以内。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2003211461A

公开(公告)日：2003-07-29

申请号：JP2002013342

申请日：2002-01-22

Applicant: BRIDGESTONE CORP

Inventor： TANAKA RYUTA ,  ISAYAMA KENICHI

IPC: G03G15/02 ,  B29C39/02 ,  B29C39/10 ,  B29K75/00 ,  B29K105/04 ,  B29L31/32 ,  C08G18/40 ,  F16C13/00 ,  G03G15/00 ,  G03G15/08 ,  G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a polyurethane foam which is free from the generation of coarse cells and has a uniform and fine surface cellulose structure and further, can be best-suitably used for various roller members of an imaging device and the like and a method for manufacturing a polyurethane foam, and a method for manufacturing a high performance roller of a polyurethane foam. SOLUTION: The device for manufacturing a polyurethane foam is of such a structure that a mechanical stirring part 2 has a stirring rotary shaft 4 installed perpendicularly and a set of inflow passages 6 and 7 are installed in the upstream of the mechanical stirring part 2 and perpendicularly to the side face of the mechanical stirring part 2 and further, a discharge aperture 3 is provided below the stirring rotary shaft 4. In addition, the device for manufacturing a polyurethane foam is of such a structure that a gas blowing port 5 for introducing a gas is opened in one or both of the inflow passages 6 and 7. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002070840A

公开(公告)日：2002-03-08

申请号：JP2000255305

申请日：2000-08-25

Applicant: BRIDGESTONE CORP

Inventor： TANAKA RYUTA ,  TAKIZAWA YOSHIO ,  INOUE SHU

IPC: G03G15/02 ,  B24B5/50 ,  F16C13/00 ,  G03G15/08 ,  G03G15/16 ,  G03G21/10

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing an elastic roller having a homogeneous and smooth surface suitable for members for an image-forming apparatus, with a short time and with high productivity. SOLUTION: In the case where a grinding process by plunge formula is applied to the outer surface of the elastic roller materials wherein an elastic body layer is formed on the outer periphery around a revolution central axis, the elastic roller with homogeneous and smooth surface is manufactured, by applying and oscillation grinding process using a polishing grind stone having a width of 0.9 to 1.3 times of the axial length of the elastic body layer.

公开(公告)号：JP2000147897A

公开(公告)日：2000-05-26

申请号：JP32417598

申请日：1998-11-13

Applicant: BRIDGESTONE CORP

Inventor： TANAKA RYUTA ,  TAKIZAWA YOSHIO

IPC: G03G15/08 ,  F16C13/00

Abstract: PROBLEM TO BE SOLVED: To provide a toner carrier with excellent toner followup ability, being free from lowering of an image density regardless of adopting over a long period, and to provide an image forming device adopting this toner carrier. SOLUTION: This toner carrier is, allowed to form the visual image by carrying the toner on a surface, forming a thin layer thereof, coming into contact with or close to the image forming body, and feeding the toner on the image forming body surface. In such a case, the toner carrier is composed by controlling peak count in the measuring length 2.5 mm to 10 to 30, and the toner carrier is provided with the conductive layer 3, and moreover the surface thereof is composed by grinding or polishing.

公开(公告)号：JPH08179620A

公开(公告)日：1996-07-12

申请号：JP32337694

申请日：1994-12-26

Applicant: BRIDGESTONE CORP

Inventor： TAKAGI MITSUHARU ,  OKADA TOKUO ,  SAWA EIJI ,  MORI YUICHIRO ,  TANAKA RYUTA

IPC: G03G15/08 ,  F16C13/00

Abstract: PURPOSE: To maintain a specified toner transporting rate or toner electrostatic charge quantity and to stably obtain high-grade images by specifying the nuclear depth roughness (Rk) stipulated in DIN4776 in the circumferential direction of a roller and the Rk ratio of the circumferential direction and axial direction of the roller on the surface of a conductive layer. CONSTITUTION: This developing roller 1 is constituted by forming the conductive layer 3 having an electrical conductivity on the outer periphery of a good conductive shaft 2. The nuclear depth roughness (Rk) stipulated in DIN4776 in the circumferential direction of the roller of the surface of this conductive layer 3 is 0.5 to 3.5μm and the Rk ratio of the circumferential direction and axial direction of the roller is the circumferential direction/axial direction > 0.1. A metallic shaft on which a mixture composed of various kinds of resins, etc., and conductive powder, magnetic powder, etc., or the shaft on which conductive resins, etc., are laminated and the surface of which is polished is usable as the conductive layer 3 when a photoreceptor and the developing roller 1 are contactless. On the other hand, a relatively soft elastic material is used for the need of a development nip when the photoreceptor and the developing roller 1 come into contact.

公开(公告)号：JP2011043842A

公开(公告)日：2011-03-03

申请号：JP2010224827

申请日：2010-10-04

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： ISAYAMA KENICHI ,  TANAKA RYUTA ,  SATO JUNICHIRO

IPC: G03G15/16 ,  C08G18/40 ,  C08K3/28 ,  C08L75/04 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To provide a conductive elastic member for an image forming apparatus, capable of stably providing a uniform resistance with minimized environmental variation or current-carrying variation thereof; and to provide an image forming apparatus using the conductive elastic member. SOLUTION: The conductive elastic member for image forming apparatus is based on an elastomer which is obtained by blending lithium imide as an ion conductive material to an elastic resin material, and has a resistance value adjusted to 7-9 [logΩ]. As the elastic resin material, a polyurethane prepared by reacting and curing an isocyanate component and a polymer polyol component is used, wherein the polymer polyol component has a ratio of hydrophilic polymer/hydrophobic polymer of 20/80 to 30/70, and the polyurethane has a resistance of 11-13 [logΩ]. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于图像形成装置的导电弹性构件，其能够以最小化的环境变化或载流变化来稳定地提供均匀的电阻; 并提供使用该导电性弹性部件的图像形成装置。 解决方案：图像形成装置用导电性弹性体是基于通过将作为离子导电材料的酰亚胺作为弹性树脂材料配合而得到的弹性体，其电阻值为7-9 [logΩ]。 作为弹性树脂材料，使用通过使异氰酸酯成分和聚合物多元醇成分反应而固化的聚氨酯，其中聚合物多元醇成分的亲水性聚合物/疏水性聚合物的比例为20/80〜30/70，聚氨酯 电阻为11-13 [logΩ]。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009093018A

公开(公告)日：2009-04-30

申请号：JP2007264830

申请日：2007-10-10

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： MACHIDA KUNIO ,  SUZUKI TAKAHIRO ,  TANAKA RYUTA

IPC: G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide a conductive endless belt, which can be manufactured without using a solvent, obtained inexpensively and has transfer performance, gloss and durability equivalent to those of the conventional polyimide belt.
SOLUTION: The conductive endless belt used for an image forming apparatus has layered structure equipped with at least a base layer and a surface layer successively from an inner side, and the surface layer contains resin including a naphthalene ring. It is desirable that the content of the resin including the naphthalene ring to all amount of resin in the surface layer is 5 wt.% or more.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供可以廉价地获得并且具有与传统聚酰亚胺带的转印性能，光泽和耐用性相当的转印性能，光泽和耐久性的可以不使用溶剂制造的导电环形带。 解决方案：用于图像形成装置的导电环形带具有从内侧依次配置有至少基底层和表面层的层状结构，表面层含有包含萘环的树脂。 包含萘环的树脂对表面层中的全部树脂的含量最好为5重量％以上。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2002070836A

公开(公告)日：2002-03-08

申请号：JP2000256234

申请日：2000-08-25

Applicant: BRIDGESTONE CORP

Inventor： INOUE SHU ,  SHIOMURA YASUAKI ,  TANAKA RYUTA ,  UEJIMA MITSUGI

IPC: G03G15/08 ,  F16C13/00

Abstract: PROBLEM TO BE SOLVED: To effectively prevent localized wear or deterioration due to sliding contact with other members on both ends of an elastic body layer and to attain life extension, in an elastic roller for business machines, with simple construction, without relaying on cumbersome means such as to make materials of the elastic body layer be different partially. SOLUTION: In the elastic roller for business machines wherein the cylindrical elastic body layer 3 is formed around the outer periphery of a support shaft 2 and the whole roller is supported by both ends of the support shaft 2 protruding from the ends of the elastic body layer 3, by forming the support shaft 2 in such a manner that a smaller diameter parts are provided in a connected row arrangement on both ends of a larger diameter part 2a coaxially and by extending both end portions of the elastic body layer 3 covering the outer surface of the larger diameter portion 2a from the end faces thereof, the deflectability of the extension parts 3a toward the centripetal direction are made higher than a portion 3a covering the outer surface of the larger diameter part 2a.

公开(公告)号：JP2002048129A

公开(公告)日：2002-02-15

申请号：JP2000231828

申请日：2000-07-31

Applicant: BRIDGESTONE CORP

Inventor： TANAKA RYUTA

IPC: G03G21/10 ,  B65G39/10 ,  B65H5/06 ,  C08K5/18 ,  C08K5/3447 ,  C08K5/37 ,  C08L75/04 ,  F16C13/00 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide an urethane roller in which degradation of physical property of urethane at the time of coating film formation is prevented by enhancing heat resistance performance with improvement of a conventional urethane roller to have a better performance and an electrophotographic apparatus using thereof. SOLUTION: The urethane roller wherein an elastic layer comprises a polyurethane material containing an oxidation inhibitor which composes principally of a polyol component and an isocyanate component in which the oxidation inhibitor includes a diphenylamine system compound, and the electrophotographic apparatus using thereof are provided.