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91. 发明专利

JPH05232803A 失效
公开(公告)号：JPH05232803A
公开(公告)日：1993-09-10
申请号：JP7634692
申请日：1992-02-25
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , IWASHIRO JIROU , KACHI AKIHIKO
IPC分类号： G03G5/14 , F16C13/00 , G03G15/08
摘要： PURPOSE:To easily control flying of a toner from a developing roll and to obtain sufficient picture image density by using a conductive coating comps. set up to make an electric resistance of the binder resin and dispersed material at under a specified value to form a conductive high molecular layer on a surrounding binder resin of a conductive roll shaft by allowing to contain the dispersed material having an electric resistance a specified value or below in binder resin. CONSTITUTION:On surrounding surface of metallic sleeve 12, the conductive high molecular layer 13 is formed. The layer 13 is formed with an electric conductive coating compn. upon setting up as a conductive powder and a dispersed material are contained dispersedly in the binder resin, and a electric resistance of the dispersed material is OMEGA.cm and electric resistance of the compn. of the binder resin and dispersed material is OMEGA.cm.

92. 发明专利

JPH0580650A COMPOSITE ROLL 失效
公开(公告)号：JPH0580650A
公开(公告)日：1993-04-02
申请号：JP27340391
申请日：1991-09-24
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , HASHIMOTO KAZUNOBU , KATO HIROYASU
IPC分类号： B65H27/00 , G03G15/00 , G03G15/08 , G03G15/10
摘要： PURPOSE:To prevent the generation of an electrical inconvenience and interlayer peeling by forming a conductive foam layer integrally formed in a two-layer structure and forming a semiconductive non-foam layer having specific volumetric resistance on the outer periphery thereof. CONSTITUTION:The composite roll 1 is constituted of a shaft body, the conductive foam layer 3 formed on the outer periphery of the shaft body and the semiconductive non-foam layer 4 formed on the outer periphery of the conductive foam layer 3. The conductive foam layer 3 is integrally molded to the two-layer structure consisting of the foam part 3a of the inside peripheral layer and the non-foam part 3b of the outer peripheral layer. The semiconductive non-foam layer 4 is set in a range of 10 to 10 OMEGA.cm volumetric resistance. At least either of synthetic solid rubber and natural solid rubber as well as liquid rubber, conductive materials, and foaming agents are used as the forming material of the conductive foam layer 3. The forming material of the semiconductive non-foam layer 4 is exemplified by high-polymer materials and conductive materials.

93. 发明专利

JPH0416972A CONDUCTIVE RESIN MATERIAL 失效
公开(公告)号：JPH0416972A
公开(公告)日：1992-01-21
申请号：JP12171590
申请日：1990-05-11
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , YOSHIKAWA HITOSHI
IPC分类号： G03G15/08 , C08L61/04 , C08L61/14
摘要： PURPOSE:To obtain the conductive resin material which can form copied images having high image quality by incorporating a phenol/novolak resin, rosin phenol resin, hardener, filler, and conductive material into this material. CONSTITUTION:The conductive resin material is constituted to contain the following components (A) to (E): (A) the phenol/novolak resin, (B) the rosin phenol resin, (C) the hardener, (D) the filler, and (E) the conductive material. Namely, if the material formed by making combination use of the phenol/ novolak resin and the rosin phenol resin is used as the conductive resin material of a conductive layer 2 constituting a developing roll, the electrostatic charge quantity in the case of positive charging of a positively charged toner is greatly improved by the effect of this rosin phenol resin. The electrostatic charge quantity to the positively charged toner is greatly improved in this way and the effect of enhancing the image quality of the copied images is obtd.

94. 发明专利

JPH047572A CONDUCTIVE ROLL 失效
公开(公告)号：JPH047572A
公开(公告)日：1992-01-10
申请号：JP11152290
申请日：1990-04-25
申请人： TOKAI RUBBER IND LTD , FUJI XEROX CO LTD
发明人： ISHIHARA KO , KANBARA NORIO , YOSHIKAWA HITOSHI , TERAO KAZUO
IPC分类号： G03G15/08
摘要： PURPOSE:To form a copy image of high picture quality by using setting resin which is derived from epoxy resin, a tert-butyl phenol novolak resin setting agent as the base material of a conductive layer and dispersing conductive particles in the base material. CONSTITUTION:The conductive roll is constituted by forming the conductive layer 12 on the outer periphery of a shaft body 11 along the circumference, and the conductive layer 12 is formed by using setting resin, derived from the epoxy resin, tert-butyl phenol novolak resin setting agent, as the base material and dispersing conductive particles in the base material. Namely, the epoxy resin and tert-butyl phenol novolak resin (tBu-phenol novolak) are used in combination as the conductive resin material which constitutes a developing roll, and then when negative electrostatically charged toner is charged electrostatically to the negative polarity by the developing roll which uses the conductive roll, the electrostatic charging quantity of negative charges is improved since the tert-buthy group is high in electron donative ability. Consequently, the picture quality increase effect of the copy image is obtained.

95. 发明专利

JPH047571A CONDUCTIVE ROLL 失效
公开(公告)号：JPH047571A
公开(公告)日：1992-01-10
申请号：JP11152190
申请日：1990-04-25
申请人： TOKAI RUBBER IND LTD , FUJI XEROX CO LTD
发明人： ISHIHARA KO , KANBARA NORIO , YOSHIKAWA HITOSHI , TERAO KAZUO
IPC分类号： G03G15/08 , C08L101/00 , C09K3/16 , F16C13/00 , G03G15/02
摘要： PURPOSE:To form a copy image of high picture quality by using specific setting resin for the base material of a conductive layer and dispersing conductive particles in the base material. CONSTITUTION:The conductive roll is constituted by forming the conductive layer 12 on the outer periphery of a shaft body 11 along the circumference and the conductive layer 12 is formed by using the setting resin, derived from resin A between tert-butyl phenol novolak resin A and phenol novolak resin B and a setting agent, and dispersing conductive material particles in the base material. Namely, a material consisting principally of tert-butyl phenol novolak resin (tBu-phenol novolak) is used as the conductive resin material which constitutes the developing roll and when negative electrostatically charged toner is charged electrostatically to the negative polarity by using the developing roll which uses the roll, the electrosatic charging quantity of negative charges to the negative electrostatically charged toner is improved since the tert-buthy group is high in electron donative ability. Consequently, the picture quality increase effect of the copy image can be obtained.

96. 发明专利

JPH047568A CONDUCTIVE ROLL 失效
公开(公告)号：JPH047568A
公开(公告)日：1992-01-10
申请号：JP10588190
申请日：1990-04-20
申请人： TOKAI RUBBER IND LTD
发明人： YOSHIKAWA HITOSHI , KANBARA NORIO , ISHIHARA KO
IPC分类号： G03G15/08
摘要： PURPOSE:To suppress the wear by long-term use by forming a conductive layer of a special ceramics coating material formed by using an org. metal compd. having film formability as an essential component and incorporating conductive power therein. CONSTITUTION:The conductive layer 22 of the conductive roll 4 formed with the conductive layer 22 on the outer periphery of a shaft body 21 is formed of the ceramics coating material which contains the org. metal compd. having the film formability as the essential component and contains the conductive powder. Namely, the conductive layer 22 is formed of the ceramics coating material which contains the org. metal compd. having the film formability as the essential component and contains the conductive powder. The hard conductive layer 22 is formed in this way and is resistant to wear even after long-term use. The conductive layer 22 is formed simply by applying the special coating material on the surface of the shaft body 21 by spray coating, dipping, etc.

97. 发明专利

JPH03284770A CONDUCTIVE ROLL 失效
公开(公告)号：JPH03284770A
公开(公告)日：1991-12-16
申请号：JP8510590
申请日：1990-03-31
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , MAEDA AKIHIRO
IPC分类号： G03G15/08 , B05C1/00
摘要： PURPOSE:To obtain uniform, effective and sufficiently high copied image density by using resin as a matrix component and dispersing at least one of titanium black and magnetic iron oxide to constitute a conductive layer. CONSTITUTION:In order to produce the conductive roll, one or both of titanium black and magnetic iron oxide which are conductive materials are blended into phenolic resin to a matrix component, mixed and agitated to form a mixed resin solution consisting of the conductive material. The mixed resin solution is stored in a tank 13 as a dipping solution. Then a core bar is vertically set up and repeatedly dipped into the mixed resin solution to form a conductive layer on the outer periphery of the core bar 12. The solvent is removed by drying it and the phenolic resin is cured by heating to form a conductive layer 14. Since the conductive roll formed by this procedure is used as a developing roll, uniform copied pictures can be obtained without generating uneven images or the like and sufficiently high image density can be obtained.

98. 发明专利

JPH03284769A CONDUCTIVE ROLL 失效
公开(公告)号：JPH03284769A
公开(公告)日：1991-12-16
申请号：JP8510490
申请日：1990-03-31
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO , MAEDA AKIHIRO
IPC分类号： G03G15/08 , B05C1/00
摘要： PURPOSE:To obtain a uniform and effective copied image by forming a conductive layer on the outer periphery of a shaft body and allowing the conductive layer to disperse at least one of titanium black and magnetic iron oxide into a matrix component. CONSTITUTION:In order to produce the conductive roll, one or both of titanium black and magnetic iron oxide to be conductive materials are mixed into epoxy resin as matrix component and the mixture is mixed and agitated to form a mixed resin solution consisting of the conductive materials. The mixed resin solution is stored in a tank 13 as a dip solution. Then a core bar 12 is vertically set up and repeatedly dipped into the mixed resin solution to form the conductive layer on the outer periphery of the core bar 12. The solvent is removed by drying it and the epoxy resin is cured by heating to form the conductive layer 14. The conductive roll formed by this procedure is used as a developing roll, so that uniform and effective copied images can be formed without generating uneven images.

99. 发明专利

JPH02211279A MANUFACTURE OF PLASTIC ROLL 失效
公开(公告)号：JPH02211279A
公开(公告)日：1990-08-22
申请号：JP3137689
申请日：1989-02-10
申请人： TOKAI RUBBER IND LTD
发明人： ISHIHARA KO , KANBARA NORIO
IPC分类号： G03G15/08 , B05D7/14 , B05D7/24
摘要： PURPOSE:To form a conductive plastic layer having high conducting property over the outer surface of a metal shaft by mixing thermoplastic resin powder with conductive powder and inserting thereinto a metal shaft which has been heated to a temperature higher than the melting point of said powder. CONSTITUTION:Thermoplastic resin powder is mixed with conductive powder to form powder molding material 1. Then the material 1 is put in a fluid tank 2 and a metal shaft 3 having been heated to a temperature about 30 deg.C higher than the melting point of the material 1 is inserted thereinto. As a result, the powder molding material 1 in contact with the outer surface of the shaft 3 is instantly melted and then instantly solidified by the removal of heat caused by the power present in the surrounding region, so that a conductive plastic layer with even thickness is formed over the outer surface of the shaft 3. In this manner, conductive powder is uniformly distributed and hence uneven distribution of electric resistance in resin layers can be minimized.

100. 发明专利

JPH0267354A PRODUCTION OF CONDUCTIVE RESIN COMPOSITION 失效
公开(公告)号：JPH0267354A
公开(公告)日：1990-03-07
申请号：JP21926288
申请日：1988-08-31
申请人： TOKAI RUBBER IND LTD
发明人： HASHIMOTO KAZUNOBU , HAYASHI SABURO , ISHIHARA KO
IPC分类号： C08L65/00 , G11B7/24
摘要： PURPOSE:To improve the processability of the title composition by changing the mean particle diameter of polypyrrole by changing the agitation speed of the solution in polymerizing a pyrrole monomer in a solution of a matrix resin, namely, by decreasing the mean particle diameter of the formed polypyrrole by increasing the agitation speed of the solution. CONSTITUTION:In a process comprising adding a pyrrole monomer and an oxidative polymerization catalyst (e.g., sodium peroxodisulfate) to a solution of a matrix resin (e.g., 6/66/610 terpolymer nylon) in a solvent (e.g., methanol), polymerizing the pyrrole in the matrix resin in the solution and recoverying the product, the mean particle diameter of the formed polypyrrole is changed by changing the agitation speed of said solution.

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