专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JPH05100549A SEMICONDUCTIVE FOAMED BODY ROLL 失效
公开(公告)号：JPH05100549A
公开(公告)日：1993-04-23
申请号：JP29235791
申请日：1991-10-11
申请人： TOKAI RUBBER IND LTD
发明人： INUBUSHI MASAAKI , YAMAMOTO TAKASHI , HAYASHI SABURO , HASHIMOTO KAZUNOBU , KATO HIROYASU
IPC分类号： C08J9/04 , C08L19/00 , C08L21/00 , G03G15/02 , G03G15/08 , G03G15/16
摘要： PURPOSE:To obtain a semiconductive foamed body roll stabilized in electric resistance and capable of obtaining a uniform nip width by using a specified high molecular compd. as a matrix and incorporating a specified amt. of a perchlorate as a conductive material. CONSTITUTION:This semiconductive foamed body roll is formed with a metallic shaft 5 and a semiconductive polymer layer 6 formed on the shaft. The polymer layer 6 is formed with the semiconductive foamed polymer composition contg. a high molecular compd., a perchlorate and a foaming agent. The high molecular compd. should have an ether linkage in the repeating unit. The amt. of the perchlorate to be mixed is controlled to 0.05-20 pts.wt. based on 100 pts.wt. of the high molecular compd. At 20 pts.wt., the electric resistance is not lowered, the polymer layer becomes brittle, and the durability is deteriorated.

22. 发明专利

JPH0580636A ELECTRIFYING ROLL 失效
公开(公告)号：JPH0580636A
公开(公告)日：1993-04-02
申请号：JP27340291
申请日：1991-09-24
申请人： TOKAI RUBBER IND LTD
发明人： INUBUSHI MASAAKI , YAMAMOTO TAKASHI , HAYASHI SABURO
IPC分类号： G03G15/02
摘要： PURPOSE:To prolong the life of the above-mentioned roll by providing a cylindrical sleeve made of a semiconductive synthetic resin and a conductive inside layer formed along the circumference on the inner peripheral surface of the cylindrical sleeve. CONSTITUTION:Semiconductive cylindrical sleeve forming materials are respectively compounded and this compd. is kneaded to obtain a mixture. This mixture is charged into an extruder and the semiconductive cylindrical sleeve 21 is produced by extrusion molding. Further, the sleeve is subjected to polishing if dimensional accuracy is required. Conductive inside layer 22 forming materials are then compounded and the inner peripheral surface of the cylindrical sleeve 21 is coated with the compd. thereof. The coating is dried and cured by heating, by which the electrifying roll 20 having a two-layered structure is produced. The molding materials prepd. by compounding high-polymer materials, such as thermoplastic resin and thermosetting resin and conductive powder, such as carbon black, are used in such a case. The conductive inside layer 22 is also obtd. by using a similar resin compsn.

23. 发明专利

JPH04303860A ELECTRIFYING ROLL 失效
公开(公告)号：JPH04303860A
公开(公告)日：1992-10-27
申请号：JP9306891
申请日：1991-03-30
申请人： TOKAI RUBBER IND LTD
发明人： INUBUSHI MASAAKI , YAMAMOTO TAKASHI , HAYASHI SABURO
IPC分类号： G03G15/02 , F16C13/00 , G03G21/06
摘要： PURPOSE:To suppress an uncomfotable sound generated at the time when an electrifying roll is brought into contact with a photosensitive body and it electrostatically charges the photosensitive body when the electrifying roll is integrated in an electrophotographic copying machine and copying is executed. CONSTITUTION:An electrical conductive elastic layer 16 is formed along a circumference on the outside circumference of a core bar 15. Besides, an electrifying layer 17 being the outermost layer is formed on the outside circumferential surface of the layer 16. Then, the layer 17 is formed of an elastic body whose matrix component is a high-polymer material and which is obtained by distributing an elastomer grain whose grain size is 7-30mum in the matrix component. Besides, the layer 17 is formed so as to make the roughness of the surface thereof 7-30mum.

24. 发明专利

JPH04283770A CONTACT TYPE ELECTROSTATIC CHARGING METHOD 失效
公开(公告)号：JPH04283770A
公开(公告)日：1992-10-08
申请号：JP7386791
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： G03G15/02
摘要： PURPOSE:To prevent the occurrence of uneveness in electrostatic charging with reference to a body to be electrostatically charged such as a photosensitive drum and also to prevent the occurrence of dielectric breakdown in a semicon ductor roll. CONSTITUTION:By bringing the semiconductive roll 1 which satisfies an inequality (Rs)/(Rv.delta)>=10 into contact with the body to be electrostatically charged so as to be relatively rotated, the body to be electrostatically charged is electrostatically charged. (Provided that Rs means the sheet resistance(OMEGA/square) of the semiconductor roll, Rv means the resistance(volume resistance : OMEGAcm) in the thickness direction of the semiconductor layer of the semiconductor roll, and delta means the thickness(cm) of the semiconductive layer).

25. 发明专利

JPH0250188A CONDUCTIVE ROLL 失效
公开(公告)号：JPH0250188A
公开(公告)日：1990-02-20
申请号：JP20224688
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 , B32B7/02 , F16C13/00 , G03G15/06 , G03G15/08 , G03G15/16
摘要： PURPOSE:To stabilize electrical characteristics by forming a semiconductive high-polymer layer on an outer peripheral layer by using a semiconductive resin compsn. which is set at a specific value or below in the content of an oxidation catalyst for pyrrole polymn. by a catalyst removal at the time of polymerizing pyrrole in a matrix resin. CONSTITUTION:The semiconductive high-polymer layer 2 formed on the outer periphery of a shaft body 1 consists of the semiconductive resin compsn. consisting of the matrix resin and the polypyrrole. The layer is formed of the material which is constituted by bringing a soln. mixture composed of the matrix resin, pyrrole monomer and oxidation polymn. catalyst into polymn. reaction at 0 - -40 deg.C and is decreased in the residual amt. of the oxidation polymn. catalyst for pyrrole polymn. in the formed polymer to

26. 发明专利

JPS62191871A HEAT FIXING ROLL 失效
公开(公告)号：JPS62191871A
公开(公告)日：1987-08-22
申请号：JP3491086
申请日：1986-02-18
申请人： TOKAI RUBBER IND LTD
发明人： HAYASHI SABURO , MIYAHARA NAOTOSHI
IPC分类号： H05B3/00 , B32B15/082 , B41J13/076 , G03G15/20
摘要： PURPOSE:To enhance durability and releasability of a toner and to prevent a copying paper from being wound on a roll by forming the surface layer made of a fluororubber containing a heavy metal oxide on an elastic layer fixed in close adhesion with the outer circumference of a core metal. CONSTITUTION:The elastic layer 2 formed in close adhesion with the outer circumference of the metal core 1 is covered with the surface layer made of the fluororubber containing a heavy metal oxide. this surface layer combines strongly with a mercapto-modified silicone oil, thus permitting the obtained heat fixing roll to exhibit superior releasability from the toner, to enhance durability, to reduce the adhesion with the copying paper, and to prevent the paper from trouble of being wound on the roll.

27. 发明专利

JPS6265859A PAPER FEED ROLLER 失效
公开(公告)号：JPS6265859A
公开(公告)日：1987-03-25
申请号：JP20400685
申请日：1985-09-13
申请人： TOKAI RUBBER IND LTD
发明人： MORISHITA KATSUSHI , HAYASHI SABURO , WAGO YOSHIHIRO
IPC分类号： B65H5/06 , G03G15/00
摘要： PURPOSE:To prevent slippage of paper due to paper powder while to improve the durability by forming fine grooves for containing and discharging the paper powder axially in the outercircumferential face layer made of abrasion-resistant rubber with predetermined interval in the circumferential direction thereby taking the paper powder into the fine groove. CONSTITUTION:A paper feed roller is formed with a sponge layer 11 on the outer circumference of a metallic core 10 while an abrasion-resistant rubber layer 12 is formed on the outercircumference of the sponge layer 11. Here, fine arched grooves 13 are formed axially from one end to the other in the surface of the rubber layer 12 with predetermined interval in the circumferential direction. The fine grooves 13 are dimensioned such that the groove width will be 50mum-5mm, the groove depth will be 20mum-2mm and the circumferential pitch will be 20mum-5m. With such arrangement, when rotating the roller in the arrow direction to feed the paper, the paper powder 14 existing on the surface of the paper 5 can be taken into the fine groove 13 resulting in prevention of slippage due to the paper powder 14.

28. 发明专利

JPH09258524A ELECTROSTATIC CHARGING ROLL 失效
公开(公告)号：JPH09258524A
公开(公告)日：1997-10-03
申请号：JP6260996
申请日：1996-03-19
申请人： TOKAI RUBBER IND LTD
发明人： ITO TETSUYA , YAMAMOTO TAKASHI , SUGIURA HIROKI , KOUNO ATSUHIRO , IMAMURA WATARU , HAYASHI SABURO
IPC分类号： F16C13/00 , G03G15/02
摘要： PROBLEM TO BE SOLVED: To provide an electrostatic charging roll capable of advantageously preventing or suppressing the generation of electrostatic charge sounds over the entire frequency region of the AC voltage to be impressed without impairing the image forming performance of an image forming device to be mounted. SOLUTION: This electrostatic charging roll 10 is composed by providing the circumference of a shaft body with a conductive base layer 14 and forming skin constituting layers 16, 18 on the outer peripheral surface of this conductive base layer 14. The roll is constituted to electrostatically charge the surface of an image carrying medium by impressing a DC voltage and AC voltage in superposition on this image carrying member under the contact state with the image carrying member. In such a case, the roll is so formed that the Asker C hardness at the time of 1kg load attains >=48 deg. and that the microrubber hardness at the time of 33.85g load attains 65 to 85 deg..

29. 发明专利

JPH0815951A CHARGED ROLL 失效
公开(公告)号：JPH0815951A
公开(公告)日：1996-01-19
申请号：JP14677194
申请日：1994-06-28
申请人： TOKAI RUBBER IND LTD
发明人： YAMAMOTO TAKASHI , OINUMA SUMIO , SHIRAKI KEITA , HAYASHI SABURO , KATO HIROYASU
IPC分类号： G03G15/02
摘要： PURPOSE:To provide a charged roll capable of obtaining an excellent copy image and free from the generation of noise by laminating a conductive elastic body layer, in which an electron-conductive type electroconducting agent is dispersed, and a conductive foamed body layer blended with an ion-conductive type electroconducting agent. CONSTITUTION:The charged roll is formed by laminating the conductive elastic body layer 21 and the conductive foamed body layer 22 on the outer periphery of the core metal 20. The conductive elastic body layer is formed of a forming material obtained by blending the electron-conductive type electroconducting agent such as carbon black, a solid solution of zinc oxide and aluminum oxide, a cross-linking agent, a softening agent, a plasticizer or the like with a matrix component such as an epichlorohydrin- ethylene oxide copolymer rubber. The conductive foamed body layer is formed by blending an ion-conductive type electroconducting agent such as trimethyl octadecyl ammonium chloride, a foaming agent, a plasticizer, a vulcanization accelerator or the like with a high polymer material such as a hydrogenated nitrile rubber. The electric resistance of the conductive elastic body layer is preferably set to OMEGA.cm and the electric resistance of the conductive foamed body layer is preferably set to 10 -10 OMEGA.cm.

30. 发明专利

JPH07295331A CONDUCTIVE ROLL AND ITS PRODUCTION 失效
公开(公告)号：JPH07295331A
公开(公告)日：1995-11-10
申请号：JP8469294
申请日：1994-04-22
申请人： TOKAI RUBBER IND LTD
发明人： YAMAMOTO TAKASHI , SHIRAKI KEITA , HAYASHI SABURO
IPC分类号： B29C44/04 , B29C44/24 , B29C70/72 , B29C70/88 , B29D99/00 , B29K21/00 , B29K105/04 , F16C13/00 , G03G15/02 , G03G15/08 , B29D31/00
摘要： PURPOSE:To provide a conductive roll which has a high stable quality and performance, can be made to have a low hardness advantagenously without compounding a softening agent and can be improved in absorption characteristics to vibration are effectively and also provide its production method. CONSTITUTION:First, a laminated body comprising an inner layer to form a conductive rubber foamed layer 14 and an outer layer to form a non-foaming semiconductive rubber layer 16 are formed, and a conductive shaft 12 is inserted into the hole of the laminated body. Then, the laminated body is subjected to vulcanization and foaming at one time in a cylindrical die so that a conductive rubber foamed layer 14 and a non-foaming semiconductive rubber layer 16 are formed into one body on the conductive shaft. Or, a laminated body before vulcanization and foaming having a three-layer structure is formed. The three-layer structure consists of an inner layer to form a semiconductive rubber foamed layer, intermediate layer to form a non- foaming conductive rubber layer 16, and outer layer to form a non-foaming semiconductive rubber layer 16. By using this laminated body and a conductive shaft 12, the same procedure as above-described is carried out to form a one body of the laminated structure on the conductive shaft.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式