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1. 发明专利

DE68924311T3 未知
公开(公告)号：DE68924311T3
公开(公告)日：2006-05-18
申请号：DE68924311
申请日：1989-07-12
申请人： KAO CORP , POWDERTECH CO LTD
发明人： HONJO TOSHIO , SATO YUJI , FUKUSHIMA YOSHIHIRO , NAWA MASAYOSHI , YASUDA SHINICHIRO
IPC分类号： G03G9/113 , G03G9/087 , G03G9/097 , G03G9/107
摘要： A developer for electrostatic photography comprises toner and carrier coated with a composition comprising a silicone resing having (II) and (II min ) and another silicone resin having (III), (IV) or (V). v

2. 发明专利

DE60013339T2 未知
公开(公告)号：DE60013339T2
公开(公告)日：2005-09-08
申请号：DE60013339
申请日：2000-02-09
申请人： POWDERTECH CO LTD
发明人： KAYAMOTO KANAO , TAKAGI KAZUNORI , SATO YUJI
IPC分类号： G03G9/113
摘要： A carrier for an electrophotographic developer which is coated with an insulating resin containing a white conducting agent, wherein the white conducting agent comprises two or more kinds of spherical to lumpy particles of TiO2, ZnO2 or SnO2 different in average particle size, the particles having thereon a 5 to 50 ANGSTROM thick conducting layer of SnO2 having solid dissolved therein a group V metal.

3. 发明专利

DE60013339D1 未知
公开(公告)号：DE60013339D1
公开(公告)日：2004-10-07
申请号：DE60013339
申请日：2000-02-09
申请人： POWDERTECH CO LTD
发明人： KAYAMOTO KANAO , TAKAGI KAZUNORI , SATO YUJI
IPC分类号： G03G9/113
摘要： A carrier for an electrophotographic developer which is coated with an insulating resin containing a white conducting agent, wherein the white conducting agent comprises two or more kinds of spherical to lumpy particles of TiO2, ZnO2 or SnO2 different in average particle size, the particles having thereon a 5 to 50 ANGSTROM thick conducting layer of SnO2 having solid dissolved therein a group V metal.

4. 发明专利

DE69823154T2 未知
公开(公告)号：DE69823154T2
公开(公告)日：2004-08-26
申请号：DE69823154
申请日：1998-12-23
申请人： POWDERTECH CO LTD
发明人： SATO YUJI , ITAGOSHI TSUYOSHI , HONJO TOSHIO
IPC分类号： G03G9/10 , G03G9/113
摘要： A method for regenerating a carrier coated with a silicone resin or a resin containing a silane coupling agent in an electrophotographic developer comprising the carrier and a toner, which comprises separating the developer into the carrier and the toner, immersing the separated carrier in an aqueous alkali solution, and stirring the mixture to remove the toner component adhered to the carrier surface and the coating resin.

5. 发明专利

DE69417203D1 未知
公开(公告)号：DE69417203D1
公开(公告)日：1999-04-22
申请号：DE69417203
申请日：1994-12-14
申请人： POWDERTECH CO LTD
发明人： SATO YUJI , OGATA MASAHIRO , SHIMIZU KOUICHI , TAKEI NORIO , HONJO TOSHIO
IPC分类号： C01G49/06 , G03G9/08 , G03G9/107 , G03G9/113 , H01F1/36
摘要： This invention provides a ferrite carrier for an electrophotographic developer characterized in that a core material is ferrite particle composed of 17.0 to 29.0 mol% of Li2O and 71.0 to 83.0 mol% of Fe2O3, exhibits a resistance of 2.5 x 10 to 2.5 x 10 OMEGA when a voltage of 250 V is applied, satisfies the relationship: a1 - a2 OMEGA and the resistance (R2) thereof exhibited when a voltage of 1000 V is applied thereto is taken as a2 x 10 OMEGA (with the proviso that 1.0 to 1.0 x 10 OMEGA when a voltage of 250 V is applied thereto, and has a true specific gravity of 4.70 or below.

6. 发明专利

DE69313681T2 未知
公开(公告)号：DE69313681T2
公开(公告)日：1998-01-08
申请号：DE69313681
申请日：1993-02-05
申请人： POWDERTECH CO LTD
发明人： SATO YUJI , FUKUMOTO TOSHIYUKI , IMAMURA YOSHIFUMI , HONJO TOSHIO
IPC分类号： G03G9/113

7. 发明专利

DE602004014656D1 未知
公开(公告)号：DE602004014656D1
公开(公告)日：2008-08-14
申请号：DE602004014656
申请日：2004-02-06
申请人： POWDERTECH CO LTD
发明人： SHINMURA ISSEI , KOBAYASHI HIROMICHI , ITAGOSHI TSUYOSHI , SATO YUJI
IPC分类号： G03G9/113 , G03G9/10 , G03G9/107 , G03G15/06
摘要： Disclosed is a carrier core material for an electrophotographic developing agent, which comprises 100 parts by weight of a ferrite component represented by a formula (A) and 0.1 to 5.0 parts by weight of ZrO 2 that is present in the ferrite component without forming a solid solution, and which has a magnetization, at 1000(10 3 /4À·A/m), of 65 to 85 Am 2 /kg and an electrical resistance, at an applied voltage of 1000 V, of 10 5 to 10 9 ©. €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (MnO) x (MgO) y (Fe 2 O 3 ) 2 €ƒ€ƒ€ƒ€ƒ€ƒ(A) wherein x, y and z are each expressed in % by mol and are numbers satisfying the conditions of 40‰¤x‰¤60, 0.1‰¤y‰¤10 and x+y+z=100. Also disclosed is a two-component developing agent comprising a coated carrier, which is obtained by coating the above carrier core material with a resin, and toner particles. Further disclosed is an image forming method comprising developing an electrostatic latent image formed by the use of an alternating electric field, with the two-component developing agent. The carrier core material and the coated carrier have high magnetization and high resistance. According to the two-component developing agent of the invention, an excellent image can be formed.

8. 发明专利

DE10103723A1 Two-component developing agent for image forming device, comprises carrier with magnetic particles of predefined average particle diameter and has predefined aggregation degree 未知
公开(公告)号：DE10103723A1
公开(公告)日：2002-02-14
申请号：DE10103723
申请日：2001-01-26
申请人： FUJITSU LTD , POWDERTECH CO LTD
发明人： NAKAMURA YASUSHIGE , ISHIMARU SEIJIRO , KATAGIRI YOSHIMICHI , SATO YUJI , ITAGOSHI TSUYOSHI , KOBAYASHI HIROMICHI
IPC分类号： C08L83/08 , G03G9/08 , G03G9/083 , G03G9/087 , G03G9/10 , G03G9/107 , G03G9/113 , G03G9/00
摘要： The two-component developing agent comprises a carrier which contains magnetic particles coated with resin on the surface, and an insulating toner. The magnetic particles have an average particle diameter of 30-90 mu m and the carrier has an aggregation degree of 2-15%. An Independent claim is also included for image forming device which forms images using the two-component developing agent. The magnetic particle of the carrier is coated with a resin containing cross-linked type fluorine modified silicone resin and an electro conductive carbon. 70-95% of the magnetic particle surface is coated to a thickness of 0.3-5 mu m of the resin. The chloroform extractives in the coating layer is 5-20%.

9. 发明专利

DE69509975T2 未知
公开(公告)号：DE69509975T2
公开(公告)日：2000-01-20
申请号：DE69509975
申请日：1995-06-28
申请人： POWDERTECH CO LTD
发明人： HONJO TOSHIO , SATO YUJI , KAYAMOTO KANAO , KOBAYASHI HIROMICHI , OGATA MASAHIRO
IPC分类号： C01G49/00 , G03G9/08 , G03G9/107 , G03G9/113 , H01F1/36
摘要： A ferrite carrier for electrophotographic developers which comprises a Mn-Mg ferrite having the general formula (MnO)x(MgO)y(Fe2O3)z wherein x + y + z = 100 mol% and SrO is substituted for a part of MnO, MgO and/or Fe2O3.

10. 发明专利

DE69509975D1 未知
公开(公告)号：DE69509975D1
公开(公告)日：1999-07-08
申请号：DE69509975
申请日：1995-06-28
申请人： POWDERTECH CO LTD
发明人： HONJO TOSHIO , SATO YUJI , KAYAMOTO KANAO , KOBAYASHI HIROMICHI , OGATA MASAHIRO
IPC分类号： C01G49/00 , G03G9/08 , G03G9/107 , G03G9/113 , H01F1/36
摘要： A ferrite carrier for electrophotographic developers which comprises a Mn-Mg ferrite having the general formula (MnO)x(MgO)y(Fe2O3)z wherein x + y + z = 100 mol% and SrO is substituted for a part of MnO, MgO and/or Fe2O3.

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