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1. 发明专利

JPH01109377A PRODUCTION OF ROLL 失效
公开(公告)号：JPH01109377A
公开(公告)日：1989-04-26
申请号：JP26870287
申请日：1987-10-23
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , KATO HIROYASU , HAYASHI HIROFUMI , SHICHI TAKASHI , YAMAGUCHI KOJI
IPC分类号： G03G15/08
摘要： PURPOSE:To prevent air from remaining between a dielectric layer and an elastic roll by thermally shrinking a heat-shrinkable tube inserted with the elastic roll under a reduced pressure, thereby forming the dielectric layer. CONSTITUTION:A conductive elastic material compsn. (e.g.: a compsn. consisting of ethylene propylene diene rubber, Ketjen black, oil and vulcanizer) is formed in a laminar state on a metallic shaft and is subjected to die vulcanization; thereafter, the surface is polished to obtain the conductive elastic roll 6. The roll 6 is then inserted into the heat-shrinkable tube 7 and is put into a reduced pressure heating vessel 9. The pressure in the vessel 9 is reduced and is heated in this state to shrink the tube 7 by which the dielectric-coated roll is obtd. The tube 7 is then adhered tightly to the roll 6 along the ruggedness of the seam of the die on the roll and the remaining of the air therebetween is prevented and, therefore, the electrical characteristics are uniformized.

2. 发明专利

JPS6438780A CONDUCTIVE ROLLER 失效
公开(公告)号：JPS6438780A
公开(公告)日：1989-02-09
申请号：JP19597387
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： G03G15/08 , G03G21/00 , G03G21/10
摘要： PURPOSE:To obtain the titled roller whose conductivity is uniform and which is not influenced by temperature, etc., by forming a surface layer by a conductive resin layer consisting of a conductive resin composite composed mainly of a dispersion being in a state that a 5-heterocyclic polymer has been dispersed uniformly in a thermoplastic resin matrix. CONSTITUTION:As for a conductive roller, a conductive resin layer 11 is formed directly or through an adhesive agent layer on the outside peripheral surface of, for instance, a metallic shaft 10. As for the conductive resin layer 11, for instance, in a solvent which can dissolve both a thermoplastic resin and a 5-heterocyclic polymer, the thermoplastic resin is dissolved first, and in its solution, a 5-heterocyclic compound is dissolved, and thereafter, by dropping an oxidizing agent, a resin liquid which has polymerized the 5-heterocyclic compound is made. Subsequently, the outside peripheral surface of the metallic shaft 10 is coated with this resin liquid and formed by dry coating. In such a way, the roller having an excellent characteristic, whose conductivity is uniform and also, which is not influenced by temperature and humidity is obtained.

3. 发明专利

JPH09274373A TONER SUPPLYING ROLL AND ITS PRODUCTION 失效
公开(公告)号：JPH09274373A
公开(公告)日：1997-10-21
申请号：JP15435896
申请日：1996-06-14
申请人： TOKAI RUBBER IND LTD , TOKAI CHEMICAL IND
发明人： SHIRAKI KEITA , HAYASHI SABURO , NOZAWA AKITOSHI , KONDO MITSUYOSHI
IPC分类号： B29D99/00 , B29K75/00 , B29K105/04 , F16C13/00 , G03G15/08 , B29D31/00
摘要： PROBLEM TO BE SOLVED: To provide a toner supplying roll which is free from fluffing of a roll surface and unstabilization of a toner transporting rate and has good dimensional accuracy and a toner supplying roll which eliminates the problems of durability and foreign matter arising from the rupture of the skin layer on the roll surface and is capable of relieving the partial change of the roll hardness by the intrusion of toners as well as an advantageous process for producing the same. SOLUTION: A soft polyurethane sponge layer 34 having the skin layer 36 forming a continuous and smooth surface having hardness of =20% of the surface of the skin layer 36.

4. 发明专利

JPH079588A PRODUCTION OF COMPOSITE ROLL 失效
公开(公告)号：JPH079588A
公开(公告)日：1995-01-13
申请号：JP18062193
申请日：1993-06-24
申请人： TOKAI RUBBER IND LTD
发明人： YAMAMOTO TAKASHI , SOMIYA KAZUTOSHI , OINUMA SUMIO , HAYASHI SABURO
IPC分类号： B29D99/00 , B29C39/10 , B29K105/04 , B29K105/20 , B29L9/00 , B29L31/32 , B29D31/00
摘要： PURPOSE:To prevent the generation of voids and to enhance the surface smoothness of a composite roll by removing air from the interface of the foam layer and non-foamable elastomer layer of the composite roll at the time of the production of the composite roll. CONSTITUTION:A non-foamed tube 14 having a large number of fine grooves extending in the axial direction thereof formed to the outer peripheral surface thereof and providing a foam layer is externally mounted on a core metal and a thin-walled elastomer tube 16 providing a non-foamable elastomer layer is externally mounted on the non-foamed tube and, after the whole is arranged in the columnar molding cavity of a mold main body 10 having a cylindrical shape, the non-foamed tube is foamed to integrate the foam layer formed from the non-foamed tube with the non-foamable elastomer layer provided by an elastomer tube.

5. 发明专利

JPH06186824A ELECTROSTATIC CHARGING ROLL 失效
公开(公告)号：JPH06186824A
公开(公告)日：1994-07-08
申请号：JP35459792
申请日：1992-12-16
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , OINUMA SUMIO , KATO HIROYASU
IPC分类号： B32B5/18 , F16C13/00 , G03G15/02
摘要： PURPOSE:To provide the electrostatic charging roll capable of maintaining a smooth surface, lowering the vibration noise by the AC component of an electric field when the roll is brought into pressurized contact with a photosensitive body and forming a stable nip by providing a conductive elastic material layer which is not a foam on the outer periphery of a foam layer. CONSTITUTION:The foam layer 14 consisting of a conductive foam is provided on the outer periphery of a shaft body (arbor) 12 and the conductive elastic material layer 16 is provided on the outer periphery thereof, by which a base layer is formed. The outer periphery of the base layer is coated with a resistance control layer 18 and a protective layer 20 in this order. Conductive rubber compsns. and conductive thermoplastic elastomers formed by incorporating conductive powders and conductive fibers, such as metallic powder, carbon black and carbon fibers, into various kinds of rubber compsns. and thermoplastic elastomers are optimum as the material for forming the conductive elastic material layer 16. The thickness of the conductive elastic material layer 16 is preferably specified to 100 to 1200mum.

6. 发明专利

JPH0588509A SEMICONDUCTIVE ROLL 失效
公开(公告)号：JPH0588509A
公开(公告)日：1993-04-09
申请号：JP27688091
申请日：1991-09-27
申请人： TOKAI RUBBER IND LTD
发明人： INUBUSHI MASAAKI , YAMAMOTO TAKASHI , HAYASHI SABURO , HASHIMOTO KAZUNOBU , KATO HIROYASU
IPC分类号： G03G15/02 , F16C13/00 , G03G15/08
摘要： PURPOSE:To obtain the semiconductive roll which has the excellent environmen tal dependency resistance and uniformity of electric resistance and can deal with high-speed models of, for example, printers, etc. CONSTITUTION:A conductive elastic material layer 21 is formed along the circumference on the outer periphery of an arbor 20. A 1st resistance adjustment layer 22 is formed on the outer periphery of this conductive elastic material layer 21 and a 2nd resistance adjustment layer 23 is formed on the outer periphery of the 1st resistance adjustment layer 22. Further, a protective layer 24 is formed on the outer periphery of the 2nd resistance adjustment layer 23. The above-mentioned 2nd resistance adjustment layer 23 is constituted of a hydrophobic synthetic resin compsn. prepd. by using a hydrophobic synthetic resin as a matrix component and dispersing and incorporating a conductive material into this matrix component.

7. 发明专利

JPH04283779A SEMICONDUCTIVE ROLL 失效
公开(公告)号：JPH04283779A
公开(公告)日：1992-10-08
申请号：JP7386991
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 provide the semiconductive roll which does not generate unequal electrostatic charge on a body to be electrostatically charged, such as photosensitive body and the dielectric breakdown in the roll itself. CONSTITUTION:The surface resistances (RsA, RsB, RsC successively from the outermost layer) of the respective layers of the semiconductive roll 1 having the three-layered structure satisfying equation (1) satisfy equations (2) to (4). Rs/Rv.delta>=10...1 [in the equation (1), Rs is the surface resistance (OMEGA/square) of the semiconductive roll, Rv is the resistance (volumetric resistance: OMEGAcm) in the thickness direction of the semiconductive layer of the semiconductive roll, delta is the thickness (cm) of the semiconductive layer.] RsA/RsB>=10...(2), RsB/RsC =1X10 ...(4) [the unit of the surface resistances RsA, RsB, RsC in the formulas (2), (3), (4) are OMEGA/square].

8. 发明专利

JPH02199163A SEMICONDUCTIVE POLYMER COMPOSITION 失效
公开(公告)号：JPH02199163A
公开(公告)日：1990-08-07
申请号：JP1828489
申请日：1989-01-28
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , KATO HIROYASU
IPC分类号： C08L71/02 , C08L75/00 , C08L75/04 , C08L77/00
摘要： PURPOSE:To obtain the title compsn. with a stable electric resistance level which is not influenced by humidity, pressing, etc., and without surface staining caused by a conductive substance by compounding a perchlorate in a matrix which is a polymer compd. with an ether bond in the repeating unit. CONSTITUTION:0.1-50 pts.wt. perchlorate (e.g. sodium perchlorate) is compounded in 100 pts.wt. matrix which are a polymer compd. with an ether bond in the repeating unit (e.g. a nylon-urethane copolymer resin). The perchlorate forms a complex ion with a chlorine atom constituting an ether bond and the complex dissociates into ions. Therefore, a uniform electric conductivity is imparted to the compsn. without the necessity for adding water. It causes neither bleedout of the conductive substance nor surface staining and exhibits excellent electrical strength and durability. Therefore, when surface layers of an electrically charged roll, a developing roll, toner transferring roll, etc., for electrophotography are formed, a printed pattern with excellent quality can always be obtd. without any influence of the atmosphere.

9. 发明专利

JPH02198809A PREPARATION OF SEMICONDUCTIVE ROLL 失效
公开(公告)号：JPH02198809A
公开(公告)日：1990-08-07
申请号：JP1828589
申请日：1989-01-28
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , KATO HIROYASU
IPC分类号： B29C39/10 , B29K71/00 , B29L31/32 , C08L71/02 , C08L75/00 , C08L75/04
摘要： PURPOSE:To efficiently prepare a semiconductive roll having a stable electric resistance level by using a semiconductive polymer composition wherein a polymeric compound having an ether bond in the repeating unit thereof is used as a matrix and perchlorate is compounded with said matrix in a specific amount. CONSTITUTION:A semiconductive polymer composition wherein a polymeric compound having an ether bond in the repeating unit thereof is used as a matrix and perchlorate is contained in the matrix is used as a material for forming the semiconductive polymer layer 2 of a semiconductive roll. Perchlorate is compounded in an amount of 0.1 - 50pts.wt. per 100pts.wt. of the matrix component. Said polymer composition is prepared as a powdery mixture by sufficiently kneading perchlorate with the polymeric compound being the matrix component. A metal shaft body 1 is arranged to the recessed part 4 having a semicircular cross-section of a lower mold 6 and, after molds 5, 6 are clamped, the semiconductive polymer composition is injected in the molds 5, 6 under high pressure and this pressure is held for a predetermined time. The molds 5, 6 are cooled to solidify the polymer composition in the molds and the semiconductive roll is obtained. No perchlorate is exuded from the semiconductive polymer composition in the molds at the time of injection molding and the inner peripheral surface of the molds are not contaminated.

10. 发明专利

JPH02198470A SEMICONDUCTIVE ROLL 失效
公开(公告)号：JPH02198470A
公开(公告)日：1990-08-06
申请号：JP1828389
申请日：1989-01-28
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , KATO HIROYASU
IPC分类号： G03G15/02 , C08L75/06 , G03G15/08 , G03G21/00 , G03G21/06
摘要： PURPOSE:To obtain a stable electric resistance level by using a high-polymer compd. having an ether bond in a repeating unit as a matrix and compounding a specific ratio of perchlorate therewith, thereby forming a semiconductive high polymer compsn. forming a semiconductive high-polymer layer. CONSTITUTION:The semiconductive high-polymer 2 formed on the outer periphery of a shaft body 1 is formed of the semiconductive high polymer compsn. which contains the high polymer compd. having the ether bond in the repeating unit as the matrix and is incorporated with 0.1 to 50pts.wt. perchlorate per 100pts.wt. matrix component in this matrix. The conductive material (perchlorate) is dispersed in the complex-ionized sate in the matrix and since the electrical conductivity is imparted to the compsn. without intervention of water, the stable electric resistance level which is not affected by an environmental change, pressurization, etc., is obtd.

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