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1. 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.

2. 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.

3. 发明专利

JP2000329136A CONDUCTIVE ROLL 失效
公开(公告)号：JP2000329136A
公开(公告)日：2000-11-28
申请号：JP13739999
申请日：1999-05-18
申请人： TOKAI RUBBER IND LTD
发明人： YOSHIKAWA HITOSHI , ARIMURA SHOJI , ITO KUNIO , OINUMA SUMIO , KACHI AKIHIKO , TAKEDA KAZUHIRO
IPC分类号： G03G15/02 , C08L9/00 , C08L71/00 , C08L83/05 , F16C13/00 , G03G15/08 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To improve compression permanent set characteristics and an image after a blade is pressed and left by forming a base rubber layer using a specific diene polymer composition. SOLUTION: A base rubber layer is formed by diene polymer composition containing diene polymer, hydrosilyl hardening agent from a formula I to III (in the formula I, R1 expresses the carbon number 2-20, R2 expresses a hydrocarbon group of the carbon number 1-20, R3 expresses hydrogen atoms or a methyl group, m, n, and p express 2 or more, positive number of 1 or more, and 0 or positive number respectively, and 5

4. 发明专利

JPH11105044A MANUFACTURE OF ELASTIC BLADE 失效
公开(公告)号：JPH11105044A
公开(公告)日：1999-04-20
申请号：JP28461697
申请日：1997-09-30
申请人： TOKAI RUBBER IND LTD
发明人： MORI HIROYUKI , OINUMA SUMIO
IPC分类号： G03G15/16 , B29C37/00 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an elastic blade which can be manufactured easily, has satisfactory straightness at its edge and dimensional accuracy. SOLUTION: The method for manufacturing an elastic blade comprises the steps of integrating a metal plate member 3 with a rubber blade member 2, then engaging a plurality of holes 5 provided at the member 3 with protrusions 7 provided at a fixture 6 to be positioned, and then cutting an end of the member 2 by inserting a cutter 9 having a cutting edge 9 longer than a length of the end of the member 2 in this thickness direction at a predetermined oblique angle, thereby forming the blade 1.

5. 发明专利

JPH10186884A PRODUCTION OF ELASTIC BLADE 失效
公开(公告)号：JPH10186884A
公开(公告)日：1998-07-14
申请号：JP35492196
申请日：1996-12-20
申请人： TOKAI RUBBER IND LTD
发明人： SOMIYA KAZUTOSHI , OINUMA SUMIO
IPC分类号： G03G15/16 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To easily produce a rubber blade member with good straightness of the edge and high dimensional accuracy even when the rubber blade member has low hardness. SOLUTION: After a metallic plate member 3 is integrated with a rubber blade member 2, plural holes 5 formed in the metallic plate member 3 are engaged with projections 7 formed on a fixing tool 6 to position the plate. Then the end of the rubber blade member 2 is cut in the thickness direction of the rubber blade member 2 by using a cutter 8 having a longer blade 9 than the end length of the rubber blade member 2. Thus, the elastic blade 1 is produced.

6. 发明专利

JPH02240535A CONTACT PRESSURE MEASURING SENSOR AND MEASURING METHOD USING SAME 失效
公开(公告)号：JPH02240535A
公开(公告)日：1990-09-25
申请号：JP6143589
申请日：1989-03-13
申请人： TOKAI RUBBER IND LTD
发明人： KACHI AKIHIKO , OINUMA SUMIO
IPC分类号： G01L5/00
摘要： PURPOSE:To accurately measure the contact pressure between a rotary roll and a blade member by branching a branch plate from an intermediate part of one surface of a substrate at a specific angle and arranging a thin plate type strain gauge on the branch part. CONSTITUTION:A two-branched sensor 6 when interposed between, for example, a developing roll 2 which rotates as shown by an arrow and the blade member 1 pressed against the roll 2 has the two-branched parts pressed in accordance with the contact force of the blade member 1 to deflect along the outer periphery of the roll 2. Then the strain gauge 10 is stuck on the reverse surface of the bending sectional shape part, formed of the tip part of the substrate 7 and the tip part of the branch plate 8, along the bending shape. When the strain gauge 10 deforms, the resistance value of a resistance wire varies and is transmitted to a measuring equipment through a conductor and indicated as a voltage value. Consequently, even when the radius of curvature of the roll 2 becomes large, the strain gauge 10 deforms greatly to improve the measurement sensitivity.

7. 发明专利

JP2002284982A ELECTROCONDUCTIVE COMPOSITION AND ELECTROCONDUCTIVE ROLL USING THE SAME 失效
公开(公告)号：JP2002284982A
公开(公告)日：2002-10-03
申请号：JP2001083362
申请日：2001-03-22
申请人： TOKAI RUBBER IND LTD
发明人： ARIMURA SHOJI , OKUDA HIROBUMI , OINUMA SUMIO , TAKEDA KAZUHIRO
IPC分类号： G03G15/02 , C08K3/06 , C08L75/04 , F16C13/00 , G03G15/08 , G03G15/16 , H01B1/20
摘要： PROBLEM TO BE SOLVED: To provide an electroconductive resin composition having low hardness, excellent abrasion resistance and compression permanent strain performance and an electroconductive roll produced by using the same. SOLUTION: The objective electroconductive composition comprises the following components (A) through (D) as essential components: (A) a millable polyurethane elastomer, (B) a silicone-grafted acrylic polymer prepared by grafting a side chain mainly comprising dimethyl siloxane onto the main chain of acrylic polymer, (C) an electroconductive agent; (D) a crosslinking agent.

8. 发明专利

JP2001175093A TRANSFER BLADE 失效
公开(公告)号：JP2001175093A
公开(公告)日：2001-06-29
申请号：JP35390599
申请日：1999-12-14
申请人： TOKAI RUBBER IND LTD
发明人： MORI HIROYUKI , OINUMA SUMIO , OKUDA HIROBUMI , TSUCHIYA KENICHI
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a transfer blade equipped with a coating layer, causing no image defect and no wear of a blade edge and effectively preventing the coating layer from being peeled and wrinkled in cutting work. SOLUTION: The coating layer is formed through a primer layer at least at the contact part of the transfer blade coming in contact with an opposite member and is constituted of the composition of fluororesin or silicone based resin, and the primer layer is constituted of material, for example, nylon or the like having middle elongation characteristic between the characteristics of a transfer blade main body and the coating layer.

9. 发明专利

JP2000231288A CONDUCTIVE BLADE FOR TRANSFERRING AND METHOD FOR FORMING ITS COATING LAYER 失效
公开(公告)号：JP2000231288A
公开(公告)日：2000-08-22
申请号：JP3210799
申请日：1999-02-10
申请人： TOKAI RUBBER IND LTD
发明人： MORI HIROYUKI , OINUMA SUMIO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To obtain a conductive blade that works well in an electrophotographic process by providing it with a tapered surface on its tip part, having it coated with a coating layer and constituting it so that the tip part of the coating layer is not expanded outside. SOLUTION: The conductive blade has the tapered surface 11 formed on the tip part of its rubber blade main body 10 and at least the tip part of the blade main body 10 including a pointed part generated from the forming of the tapered surface 11 is coated with the coating layer 12 of an appropriate material. Therefore, the service life of the conductive blade is prolonged by having it abutted to a belt for carrying of recording material along with the fact that this part is coated by the coating layer 12. Furthermore, the coating layer 12 that covers the pointed part generated by formation of the tapered surface 11 is not expanded outside a notch angle of the tapered surface 11. Therefore, failure where a hump 12a comes into contact with a belt and not enabling a state of linear contact by only one edge can be avoided.

10. 发明专利

JPH08276512A MANUFACTURE OF ELECTRIFYING ROLL 失效
公开(公告)号：JPH08276512A
公开(公告)日：1996-10-22
申请号：JP7855295
申请日：1995-04-04
申请人： TOKAI RUBBER IND LTD
发明人： SOMIYA KAZUTOSHI , OINUMA SUMIO , YAMAMOTO TAKASHI
IPC分类号： G03G15/02 , B29D99/00 , B29K21/00 , B29K105/04 , F16C13/00 , B29D31/00
摘要： PURPOSE: To provide a method for simply manufacturing an electrifying roll, which can stably display excellent leakage resistance, without being subjected to special processing course. CONSTITUTION: A cylindrical mold having a molding cavity, the inner diameter of both the axial end parts at the part for forming electrically conductive base layer and surface smooth layer thereof of which becomes gradually smaller, is used so as to arrange a mandrel in the molding cavity. After green solid rubber tube, which is to form the electrically conductive base layer, is externally installed onto the mandrel and further resin tube, which is to form the surface smooth layer, is externally installed on the green solid rubber tube, the electrically conductive base layer and the surface smooth layer are integrally and laminatingly formed so as to have the external shape corresponding to the shape of the molding cavity on the outer peripheral surface of the mandrel through the application of vulcanizing molding operation and foaming molding operation of the green solid rubber tube. Further, after that, at least electrically semi-conductive covering layer is formed on the outer peripheral surface of the surface smooth layer.

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