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11. 发明专利

JPS61261759A FRICTIONAL ELECTROSTATIC CHARGING MEMBER FOR ONE-COMPONENT TYPE TONER 失效
公开(公告)号：JPS61261759A
公开(公告)日：1986-11-19
申请号：JP10480585
申请日：1985-05-16
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO
IPC分类号： G03G15/08
摘要： PURPOSE:To charge electrostatically and stably a toner to a prescribed polarity and to make possible the formation of a uniform toner layer by forming a frictional electrostatic charging body of a rubber compd. contg. an electrostatic charge controlling agent applying the electrostatic charge of the polarity reverse from the polarity of en electrostatic latent image and having a prescribed loss coefft. CONSTITUTION:The frictional electrostatic charging body 14 consists basically of the rubber into which the charge controlling agent is incorporated. More specifically, an electron acceptive functional group-contg. azo compd. which charges the toner to the positive polarity is used when the electrostatic charge image is negative and a quaternary ammonium salt or the like which charges the toner to a negative polarity is used if the electrostatic latent image is positive. The loss coefft. of the body 14 is made

12. 发明专利

JPH08137192A ELECTROSTATIC CHARGING ROLL 失效
公开(公告)号：JPH08137192A
公开(公告)日：1996-05-31
申请号：JP26982394
申请日：1994-11-02
申请人： TOKAI RUBBER IND LTD
发明人： YAMAMOTO TAKASHI , OINUMA SUMIO , SHIRAKI KEITA , HAYASHI SABURO
IPC分类号： G03G15/02 , F16C13/00
摘要： PURPOSE: To provide an electrostatic charging roll capable of advantageously preventing the preferential chipping of the thin part of the photosensitive layer of a photoreceptor at the time of voltage impression and effectively preventing the occurrence of a electrostatic charging defect and electric discharge destruction in the contact part of the photosensitive layer of the photoreceptor with the thin part occurring in such chipping of the photosensitive layer. CONSTITUTION: The outer peripheral surface of a shaft body 12 is provided with a base layer 14 composed of an ion conductive elastic material having volume resistivity of 10 to 10 Ωcm and the outer peripheral surface of this base layer 14 is provided with an electrode layer 16 composed of an electron conductive synthetic resin material having volume resistivity of 10 Ωcm in the part exclusive of at least one end in the axial direction of the base layer 14, by which the parts not provided with the electrode layer 16 are formed over a prescribed length at least at one end in such axial direction. Further, the outer peripheral surfaces of the part provided with the electrode layer 16 and the parts not provided with the electrode layer 16 are provided with resistance control layers 18 and protective layers 20 from the inner side to the outer side of the diametral direction of the roll.

13. 发明专利

JPH04283778A SEMICONDUCTIVE ROLL 失效
公开(公告)号：JPH04283778A
公开(公告)日：1992-10-08
申请号：JP7386891
申请日：1991-03-12
申请人： TOKAI RUBBER IND LTD
发明人： HASHIMOTO KAZUNOBU , KATO HIROYASU , ISHIHARA KO , HAYASHI SABURO , INUBUSHI MASAAKI , YAMAMOTO TAKASHI
IPC分类号： G03G15/09
摘要： PURPOSE:To obviate the generation of unequal electrostatic charge in a body to be electrostatically charged, such as photosensitive drum and the generation of dielectric breakdown in the semiconductive roll itself by specifying the relations among the surface resistance of this roll, the resistance in the thickness direction of the semiconductive layer and the thickness of the semiconductive layer. CONSTITUTION:An arbor part 5 is formed of an arbor 3 and a conductive rubber layer 4. The semiconductive layers respectively consisting of the semiconductive materials are formed in order of the layer A, layer B on the outer periphery of the arbor part 5. The relations among the surface resistance Rs of the semiconductive roll 1, the resistance (volumetric resistance) Rv in the thickness direction of the semiconductive layers (layer A, layer B) and the overall thickness delta of the semiconductive layers (layer A, layer B) are set like equation I. The current quantity flowing in the roll surface direction (circumferential direction) decreases relatively as compared with the current quantity in the thickness direction of the semiconductive layers (layer A, layer B) if the relations are set in such a manner Then, the concentration of the currents near the part where the semiconductive roll 1 and the body to be electrostatically charged, such as photosensitive body, come into contact is averted and the generation of a discharge phenomenon is prevented.

14. 发明专利

JPH0249066A ELECTRICALLY CONDUCTIVE RESIN COMPOSITION 失效
公开(公告)号：JPH0249066A
公开(公告)日：1990-02-19
申请号：JP20224088
申请日：1988-08-11
申请人： TOKAI RUBBER IND LTD
发明人： HASHIMOTO KAZUNOBU , HAYASHI SABURO , ISHIHARA KO
IPC分类号： G03G15/02 , C08L101/00
摘要： PURPOSE:To obtain an electrically conductive resin composition having excellent processability, soluble in organic solvent, applicable by coating and useful as an electrically conductive roll of electrophotographic copying machine, etc., by compounding polypyrrole into a matrix resin at a specific ratio. CONSTITUTION:(A) A matrix resin, e.g., a terpolymer of nylon 6, nylon 66 and nylon 610 soluble in organic solvent is dissolved in an organic solvent (e.g., methanol), mixed with (B) a pyrrole monomer (e.g., N-alkylpyrrole) and stirred at -40-0 deg.C. The mixture is added with (C) 0.5-4mol (based on 1mol of the component B) of an oxidation polymerization catalyst for the polymerization of the pyrrole and the polymerized product is thrown into water to coagulate the polymer and terminate the reaction. The product is preferably subjected to the catalyst-removal treatment, etc., to obtain the objective electrically conductive resin composition having a weight ratio of the component A to polypyrrole of 71/29-99/1 (the sum of the component A and the polypyrrole is 100).

15. 发明专利

JPH0249055A ELECTRICALLY SEMICONDUCTING RESIN COMPOSITION 失效
公开(公告)号：JPH0249055A
公开(公告)日：1990-02-19
申请号：JP20224188
申请日：1988-08-11
申请人： TOKAI RUBBER IND LTD
发明人： HASHIMOTO KAZUNOBU , HAYASHI SABURO , ISHIHARA KO
IPC分类号： G03G15/02 , C08L65/00 , G03G15/20
摘要： PURPOSE:To obtain an electrically semiconducting resin composition, containing polypyrrole distributed in a matrix resin having stabilized electrical characteristics by reducing the residual amount of an oxidative polymerization catalyst for pyrrole to a specific value or below by removing the catalyst. CONSTITUTION:An electrically semiconducting resin composition obtained by dissolving (A) a matrix resin (e.g., nylon 6/nylon 66/nylon 610 terpolymer nylon) in an organic solvent (e.g., methanol), then adding (B) a pyrrole monomer (e.g., N-alkylpyrrole), stirring the resultant solution at -40 to 0 deg.C temperature, subsequently adding (C) an oxidative polymerization catalyst for polymerizing the pyrrole in an amount of 0.5-4mol based on 1mol component (B), polymerizing the monomer and dipping the obtained polymer in clean water for 1 to 2 days and nights to remove the catalyst (preferably in two stages) at (71/29)-(99/1) ratio of the component (A) to pyrrole with

16. 发明专利

JPS6462676A ROLL 失效
公开(公告)号：JPS6462676A
公开(公告)日：1989-03-09
申请号：JP22004487
申请日：1987-09-02
申请人： TOKAI RUBBER IND LTD
发明人： SHICHI TAKASHI , WAGO YOSHIHIRO , OTA YUJI , YAMAGUCHI KOJI , HAYASHI SABURO
IPC分类号： B65G65/48 , B65H27/00 , G03G15/08
摘要： PURPOSE:To supply toner to a developing roll stably by using a nonporous body which is contained with an electrostatic charging control agent for giving static charges of the opposite polarity from an electrostatic latent image formed on a photosensitive drum for the surface layer of a sleeve, and roughening the surface. CONSTITUTION:A roll 1 consists of a mandrel 11 and the sleeve 12 formed of an elastic member on the outer peripheral surface of the mandrel 11, the surface layer 12a of the sleeve 12 is made of the nonporous body contg. the electrostatic charging control agent for giving static charges of the opposite polarity from the electrostatic latent image formed on the photosensitive drum 3, and the surface is roughened. The surface layer 12a of the sleeve does not have holes that toner enters unlike a porous body and the surface layer 12 is never hardened owing to clogging. Further, the surface layer 12a contains the electrostatic charging control agent, so the toner supplied to the developing roll 2 is charged enough electrostatically with the frictional force between the developing roll 2 and a roller 1 for toner conveyance. Consequently, the uniform toner layer with superior electrostatic charging characteristics is formed on the developing roll to obtain an image of high picture quality.

17. 发明专利

JPS61250666A FRICTIONAL ELECTROSTATIC CHARGE MEMBER FOR ONE-COMPONENT TONER 失效
公开(公告)号：JPS61250666A
公开(公告)日：1986-11-07
申请号：JP9293385
申请日：1985-04-30
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO
IPC分类号： G03G15/08
摘要： PURPOSE:To eliminate the need for mixing an electrostatic charge controlling agent into a toner by forming a frictional electrostatic charge body of rubber and incorporating the electrostatic charge controlling agent which can apply the electrostatic charge of the polarity reversed from the polarity of the electrostatic latent image formed on an image base into the rubber. CONSTITUTION:The frictional charge body is formed of the rubber compsn. contg. 0.75pt.wt. color index pigment yellow 14 in 100pts.wt. ethylene propylene diene rubber and vulcanized with peroxide and is adhered and fixed onto the base. A styrene/methyl methacrylate copolymer resin which is mixed with a coloring agent having no electrostatic charge controlling function is used as the toner to develop and copy the electrostatic latent image on the image base. The toner is stably electrostatically charged to the positive polarity by friction with the frictional charge member and the charged toner passes easily between the frictional charge member and a developing roller according to the rotation of the developing roller. The generation of fogging, etc. is obviated even after 20,000 sheets of copying.

18. 发明专利

JP2001079844A METHOD FOR SEPARATING SHAFT OF ROLL AND APPARATUS FOR SEPARATING SHAFT 失效
公开(公告)号：JP2001079844A
公开(公告)日：2001-03-27
申请号：JP26238699
申请日：1999-09-16
申请人： TOKAI RUBBER IND LTD
发明人： NISHIJIMA SHIGERU , MATSUBAYASHI HIROAKI , HAYASHI SABURO , SHIBATA TAKEO , SEKITO YASUKI
IPC分类号： B29B13/08 , B29B17/02
摘要： PROBLEM TO BE SOLVED: To provide a method for separating a shaft wherein the shaft made of a metal of a roll used for an electro-photographic apparatus is separated from an elastic body under a condition where the outer peripheral face is coated with the elastic body and can be recovered in a reusable good shape without deforming and damaging the shaft at that time. SOLUTION: A roll 10 for an electrophotographic apparatus with a shaft 12 which can be heated by means of high-frequency induction heating and an elastic body 14 provided under a condition where the outer peripheral face is covered therewith is treated by induction heating through a high-frequency induction heating coil 18 to thermally destroy the interface of adhesion of the elastic body 14 to the shaft 12. Thereafter, the shaft is pushed out from the elastic body 14 by means of a shaft separating pin 40 and a separating cylinder 42 to separate it.

19. 发明专利

JP2534873B2 失效
公开(公告)号：JP2534873B2
公开(公告)日：1996-09-18
申请号：JP19597487
申请日：1987-08-05
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , HASHIMOTO KAZUNOBU , KATO HIROYASU , SHICHI TAKASHI , YAMAGUCHI KOJI
IPC分类号： C08G61/12 , C08G61/10 , C08L45/00 , C08L65/00 , C08L101/00 , H01B1/12

20. 发明专利

JPH08106199A ELECTRIFYING ROLL 失效
公开(公告)号：JPH08106199A
公开(公告)日：1996-04-23
申请号：JP24311494
申请日：1994-10-06
申请人： TOKAI RUBBER IND LTD
发明人： SOMIYA KAZUTOSHI , OINUMA SUMIO , HAYASHI SABURO , YAMAMOTO TAKASHI
IPC分类号： G03G15/02
摘要： PURPOSE: To obtain an electrifying roll with which a good copied image is obtd. and the generation of noise can be suppressed. CONSTITUTION: This electrifying roll is produced by the following method. A first conductive foamed layer 21 is formed by using a material having electron-conductive conducting agent dispersed in a matrix component around a core metal 20. A second conductive foamed layer 22 is formed by using a material of a polymer material compounded with an ion-conductive conducting agent around the first conductive foamed layer 21. Further, a protective layer 23 is formed around the second conductive foamed layer 22.

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