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71. 发明专利

JPH07140760A CONDUCTIVE ROLL 失效
公开(公告)号：JPH07140760A
公开(公告)日：1995-06-02
申请号：JP30977193
申请日：1993-11-15
申请人： TOKAI RUBBER IND LTD
发明人： TSUCHIYA KENICHI , KATO HIROYASU , KANBARA NORIO , OINUMA SUMIO
IPC分类号： G03G15/02 , F16C13/00 , G03G15/08 , G03G15/16 , G03G21/10
摘要： PURPOSE:To provide a conductive roll with which proper initial resistance is obtd., proper electric resistance can be maintained even when used for a long time, and good images can be obtd. CONSTITUTION:This conductive roll is produced by forming a conductive elastic layer 27 around the core metal 26, forming a softening agent-preventing layer 28 essentially comprising N-methoxymethylate nylon around the layer 27, then forming a resistance controlling layer 29 around the layer 28, and further forming a protective layer 30 essentially comprising N-methoxymethylate nylon as the outermost layer around the layer 29. The resistance controlling layer 29 consists of a compd. essentially comprising components (A) to (C). (A) Epochlorohydrin-ethylene oxide copolymer, (B) hydrogenated nitrile rubber, and (C) ionizing conductive agent.

72. 发明专利

JPH0792825A CONDUCTIVE PLASTIC BELT 失效
公开(公告)号：JPH0792825A
公开(公告)日：1995-04-07
申请号：JP20654193
申请日：1993-08-20
申请人： TOKAI RUBBER IND LTD
发明人： YASUI EIJI , KANBARA NORIO
IPC分类号： G03G15/16 , G03G21/00
摘要： PURPOSE:To effectively improve a bending fatigue resistance and durability to allow the toner to be hardly stuck and to effectively prevent the occurrence of the filming of the toner by using fluororesin for a conductive material as the forming material of a surface layer, as base resin. CONSTITUTION:In a conductive plastic belt 18 as a transfer intermediate body, electric resistance is controlled to a semi-conductive region (10 -10 OMEGA), to receive the toner from a photoreceptor 10 and deliver the toner to a copying paper 24. At this time, a prescribed conductive filler is compounded into the fluororesin, the volume resistivity of the conductive material is adjusted 10 -10 OMEGAcm. Thus, excellent electric characteristics are imparted to the finally obtained conductive plastic belt 18. Since the fluororesin is used as the base resin, the bending fatigue resistance of the conductive plastic belt 18 and further, the releasability of the toner are effectively improved based on the characteristics of the fluororesin.

73. 发明专利

JPH0754836A CONDUCTIVE ROLL 失效
公开(公告)号：JPH0754836A
公开(公告)日：1995-02-28
申请号：JP20759493
申请日：1993-08-23
申请人： TOKAI RUBBER IND LTD
发明人： KANBARA NORIO , YOSHIKAWA HITOSHI
IPC分类号： F16C13/00 , G03G15/02 , G03G15/08
摘要： PURPOSE:To provide a toner charging property stably for a long period while restraining the bleed and bloom of low molecular weight component from a basic layer to prevent a photosensitive drum from being contaminated by preventing a conductive roll from the adhesion of toner thereto. CONSTITUTION:While a basic layer 12 made of a conductive elastic body is provided on the outer peripheral surface of a shaft body 10, a coating layer 14 made of polyurethane thermoplastic elastomer cross-linked by amino resin is provided on the outer peripheral surface of the basic layer 12.

74. 发明专利

JPH05249816A 失效
公开(公告)号：JPH05249816A
公开(公告)日：1993-09-28
申请号：JP8348692
申请日：1992-03-04
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , IWASHIRO JIROU , KACHI AKIHIKO
IPC分类号： G03G15/08
摘要： PURPOSE:To obtain the conductive roll with which the uniform and sufficient density of copied images is obtainable and which is excellent in fogging resistance by constituting the roller of a shaft body, an electrical insulating layer formed on the outer peripheral surface of this shaft body and a conductive layer formed on the outer peripheral surface of this electrical insulating layer. CONSTITUTION:The electrical insulating layer to be formed on the outer peripheral surface of the metallic sleeve (shaft body) 12 is, for example, an oxide film layer 13 formed by subjecting the surface of the shaft body 12 to an oxidation treatment or a nonconductive resin layer formed by using a nonconductive coating material compsn. essentially consisting of a binder resin. For example, the surface of the metallic shaft body 12 is subjected to the oxidation treatment, by which the oxide film layer 13 of a thin layer is formed on the surface of the shaft body 12. The conductive layer 14 formed on the outer peripheral surface of the electrical insulating layer is formed by using the conductive coating material contg. the binder resin and the conductive material. The accumulation of the residual charges of toners which is the cause for the generation of fogging is prevented when the electrical insulating layer is provided between the shaft body 12 and the conductive layer 14 in such a manner and, therefore, the control of the splashing of the toners from the roll is facilitated.

75. 发明专利

JPH0535089A CONDUCTIVE ROLL 失效
公开(公告)号：JPH0535089A
公开(公告)日：1993-02-12
申请号：JP21625791
申请日：1991-07-31
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , YOSHIKAWA HITOSHI
IPC分类号： G03G15/02 , G03G15/08
摘要： PURPOSE:To provide the conductive roll having uniform electrostatic chargeability and a sufficient electrostatic charge quantity. CONSTITUTION:A metallic sleeve 13 is coaxially disposed onto a magnet shaft 10 in the state of providing a gap. A conductive layer 12 is formed on the outer periphery of this metallic sleeve 13. The conductive 12 is formed of a conductive compsn. consisting of components (A) to (C) and a charge control agent is impregnated into the component (B). (A) An org. high-polymer binder resin. (B) A porous packing material. (C) Conductive powder.

76. 发明专利

JPH056096A CONDUCTIVE ROLL 失效
公开(公告)号：JPH056096A
公开(公告)日：1993-01-14
申请号：JP18299691
申请日：1991-06-26
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , MAEDA AKIHIRO
IPC分类号： G03G15/09
摘要： PURPOSE:To obtain the conductive roll which has the electric resistance uniform over the entire part and has excellent durability and leak resistance. CONSTITUTION:A metallic sleeve 12 is disposed coaxially in the state of having a gap on the outer periphery of a magnet shaft 42. A conductive layer 14 is formed on the outer periphery of the metallic sleeve 12 and further, a resistance layer 15 is formed on the outer periphery of this conductive layer 14. The conductive layer 14 is formed by dispersing at least either of titanium black and magnetic iron oxide and a filler into a matrix component. The resistance layer 15 is formed of a phenolic resin as a matrix component and dispersing at least either of the titanium black and magnetic iron oxide into the matrix component. In addition, the electric resistance value of the resistance layer 15 is set larger than the electric resistance value of the conductive layer 14. For example, the generation of unequal images, etc., is obviated if this roll is used as a developing roller. Uniform and good copied images are obtd. and the roll sufficiently withstands long-term use.

77. 发明专利

JPH056095A CONDUCTIVE ROLL 失效
公开(公告)号：JPH056095A
公开(公告)日：1993-01-14
申请号：JP18299591
申请日：1991-06-26
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , MAEDA AKIHIRO
IPC分类号： G03G15/09
摘要： PURPOSE:To obtain the conductive roll having uniform electric resistance and excellent electrostatic chargeability by constituting a conductive layer by dispersing at least either of a titanium black and magnetic iron oxide into a phenolic resin used as a matrix component. CONSTITUTION:A metallic sleeve 12 formed coaxially with the conductive layer 15 in the state of having a gap on the outer periphery of a magnet shaft 42 and further, end caps 41 are fitted to both right and left ends thereof, by which the conductive roll is produced. The phenolic resin (more particularly preferably resol type phenolic resin) is used as the matrix component of the conductive material forming the conductive layer 15. In addition, either or both of the titanium black and magnetic iron oxide are used as the conductive material to be compounded with the phenolic resin matrix component. The conductive material is thereby uniformly dispersed into the matrix component in the conductive layer.

78. 发明专利

JPH04303864A CONDUCTIVE COATING MATERIAL 失效
公开(公告)号：JPH04303864A
公开(公告)日：1992-10-27
申请号：JP9306191
申请日：1991-03-30
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , YOSHIKAWA HITOSHI
IPC分类号： G03G15/08
摘要： PURPOSE:To obtain a copied image having sufficiently high density by forming an electrically conductive roll with a conductive coating material and incorporating this roll into an electrophotographic copying machine. CONSTITUTION:This conductive coating material is based on a silicone resin binder and contains at least one kind of powdery filler selected among silicone powder, polyamide resin powder and methacrylate resin powder each having

79. 发明专利

JPH04202538A PHENOLIC RESIN MATERIAL FOR EXTRUSION-MOLDING AND FORMED PIPE PRODUCED THEREFROM 失效
公开(公告)号：JPH04202538A
公开(公告)日：1992-07-23
申请号：JP33964690
申请日：1990-11-30
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , HORIO YUKINOBU , YOSHIKAWA HITOSHI
IPC分类号： G03D5/06 , B29C47/00 , B29K61/04 , B29K105/06 , B29K105/16 , C08J5/24 , C08L61/04 , C08L61/08
摘要： PURPOSE:To provide a phenolic resin material for extrusion-molding composed of a novolak phenolic resin, hexamethylenetetramine and reinforcing fiber and/or mica powder and capable of giving a continuous formed pipe having high rigidity and alkali resistance. CONSTITUTION:The objective phenolic resin material for extrusion-molding is composed mainly of (A) 100 pts. wt. of a precondensate of a novolak phenolic resin produced by reacting a (modified) phenolic compound with an aldehyde in the presence of an acidic catalyst, (B) 20-30 pts. wt. of hexamethylenetetramine as a hardener for the component A and (C) 80-160 pts. wt. of reinforcing fiber (e.g. glass fiber and whisker fiber) and/or mica powder. A formed pipe 7a can be produced by the extrusion molding of the molding material 5 using an extrusionmolding machine 10 furnished with a plunger 1 for pushing the material, a cylinder 2, a die 3 having a tapered face 3a and a heating means and a mandrel 4.

80. 发明专利

JPH04106163A CONDUCTIVE COATING MATERIAL 失效
公开(公告)号：JPH04106163A
公开(公告)日：1992-04-08
申请号：JP22637190
申请日：1990-08-27
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , IWASHIRO JIROU , YASUI EIJI
IPC分类号： G03G15/08 , C09D5/24
摘要： PURPOSE:To obtain a conductive coating material which gives a copied image free from nonuniformity and having a clear contrast by incorporating a metal oxide conductor and a carbonaceous conductor which have a specified relation regarding the particle diameters. CONSTITUTION:A conductive coating material composed mainly of a binder resin and containing a metal oxide conductor and a carbonaceous conductor, wherein the mean particle diameter (DM) of the metal oxide is larger than that (DC) of the carbonaceous material and the electrical resistance (RvM) of a coating film obtained by incorporating only the metallic oxide into the binder resin will be smaller than that (RvC) of a coating film obtained by incorporating only the carbonaceous material into the binder resin.

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