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1. 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%.

2. 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.

3. 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.

4. 发明专利

AU2003266697A8 Carrier for electrophotography 未知
公开(公告)号：AU2003266697A8
公开(公告)日：2004-04-23
申请号：AU2003266697
申请日：2003-09-30
申请人： MATSUSHITA ELECTRIC IND CO LTD , POWDERTECH CO LTD
发明人： YUASA YASUHITO , UMEDA KIMINORI , UEMURA TETSUYA , ITAGOSHI TSUYOSHI
IPC分类号： G03G9/113 , G03G9/08

5. 发明专利

DE60321100D1 未知
公开(公告)号：DE60321100D1
公开(公告)日：2008-07-03
申请号：DE60321100
申请日：2003-09-02
申请人： POWDERTECH CO LTD
发明人： NAITO TEKESHI , ITAGOSHI TSUYOSHI , KOBAYASHI HIROMICHI , SATO YUJI
IPC分类号： G03G9/08 , G03G9/10 , G03G9/107 , G03G9/113
摘要： The present invention provides a dry two-component type developer for electrophotography comprising a carrier particle and a toner particle, wherein a toner water adsorption ratio (T) obtained by a following equation (1) for the toner particle ranges from 1.0 to 7.0 and a carrier water adsorption ratio (C) obtained by a following equation (2) is 20. 0 or less, and a water adsorption ratio (T/C) expressed in a following equation (3) representing a relationship between the toner water adsorption ratio (T) and the carrier water adsorption ratio (C) is 5.0 or less; a toner water adsorption ratio (T) =Äa water adsorption amount (TH)of the toner particle /an N2 adsorption amount (TN)of the toner particleÜ a carrier water adsorption ratio (C) =Äa water adsorption amount (CH)of the carrier particle /an N2 adsorption amount(CN) of the carrier particleÜ and a water adsorption ratio (T/C) =Äa toner water adsorption ratio (T) /a carrier water adsorptionratio (C)Ü In the dry two-component type developer for electrophotography according to the present invention, even if use conditions are changed, a developing characteristic is less varied.

6. 发明专利

DE69824269D1 未知
公开(公告)号：DE69824269D1
公开(公告)日：2004-07-08
申请号：DE69824269
申请日：1998-03-04
申请人： POWDERTECH CO LTD
发明人： SATO YUJI , ITAGOSHI TSUYOSHI , TAKAGI KAZUNORI , TAKEI NORIO , HONJO TOSHIO
IPC分类号： G03G9/107 , G03G9/113
摘要： A ferrite carrier for electrophotographic developers which is represented by formula: (MnO)x(MgO)y(Fe2O3)z wherein x + y + z = 100 mol%, and part of MnO, MgO and/or Fe2O3 is substituted with SnO2, and has a saturation magnetization of 20 to 43 emu/g.

7. 发明专利

DE10103723B4 未知
公开(公告)号：DE10103723B4
公开(公告)日：2005-12-01
申请号：DE10103723
申请日：2001-01-26
申请人： FUJI XEROX CO 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： There is disclosed a two-component developing agent for use in an mage formation based on electrophotography, which has high developability even at a high speed printing and good developability in the case of the image formation for a long period of time. The two-component developing agent includes a carrier comprising a magnetic particle and an insulating toner. A surface of the magnetic particle is coated with at least a resin. A mean particle size of the magnetic particle is between 30 and 90 mum and an aggregation degree of said carrier is between 2 and 15%.

8. 发明专利

DE69824269T2 未知
公开(公告)号：DE69824269T2
公开(公告)日：2004-09-23
申请号：DE69824269
申请日：1998-03-04
申请人： POWDERTECH CO LTD
发明人： SATO YUJI , ITAGOSHI TSUYOSHI , TAKAGI KAZUNORI , TAKEI NORIO , HONJO TOSHIO
IPC分类号： G03G9/107 , G03G9/113
摘要： A ferrite carrier for electrophotographic developers which is represented by formula: (MnO)x(MgO)y(Fe2O3)z wherein x + y + z = 100 mol%, and part of MnO, MgO and/or Fe2O3 is substituted with SnO2, and has a saturation magnetization of 20 to 43 emu/g.

9. 发明专利

DE69823154D1 未知
公开(公告)号：DE69823154D1
公开(公告)日：2004-05-19
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.

10. 发明专利

DE60239377D1 Träger für elektrophotographische Entwickler und Entwickler die den Träger enthalten 未知
公开(公告)号：DE60239377D1
公开(公告)日：2011-04-21
申请号：DE60239377
申请日：2002-06-21
申请人： POWDERTECH CO LTD
发明人： KOBAYASHI HIROMICHI , ITAGOSHI TSUYOSHI , NAITO TAKESHI , SATO YUJI
IPC分类号： G03G9/113

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