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31. 发明专利

JPH04282646A IMAGE FORMING METHOD 失效
公开(公告)号：JPH04282646A
公开(公告)日：1992-10-07
申请号：JP4670691
申请日：1991-03-12
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI , KIMURA FUMIO , NOGUCHI KOJI
IPC分类号： G03G13/08 , G03G15/09
摘要： PURPOSE:To provide the image recording method high in image density and resolution not causing bleeding or fogging, and stabilized in a distribution of triboelectrification amount. CONSTITUTION:A recording electrode is arranged opposite to a recording body 1 provided with an insulating layer on the surface and movably set to form a recording zone between the insulating layer and the recording electrode 6. A magnetic toner 9 is prepared by fixing conductive particles to the surface of each toner particle containing a fixing resin, a magnetic powder, and a 0.5-2.0wt.% positively chargeable charge controller and further fixing fine silica particles onto the outside to control a bulk resistivity to OMEGA.cm and a surface resistivity to 10 -10 OMEGA.cm. The toner image is formed on the surface of the recording body 1 by feeding the magnetic toner 9 to the recording zone, applying recording signal voltage corresponding to an original image to the recording electrode 6.

32. 发明专利

JPH04214569A MAGNETIC TONER 失效
公开(公告)号：JPH04214569A
公开(公告)日：1992-08-05
申请号：JP41023090
申请日：1990-12-12
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI
IPC分类号： G03G9/08
摘要： PURPOSE:To offer a magnetic toner used for developing a electrostatic latent image in electrophotography, electrostatic recording, etc., or a magnetic latent image, in magnetic recording, especially is produced easily, being able to satisfy demands for high quality image and having small diameter. CONSTITUTION:A film consisting of the same kind of the binder resin is formed on the surface of aggregate of primary particle containing the binder resin and 10-70wt.% the magnetic material powder having

33. 发明专利

JPH04159561A TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE 失效
公开(公告)号：JPH04159561A
公开(公告)日：1992-06-02
申请号：JP28644690
申请日：1990-10-24
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI
IPC分类号： G03G9/08 , G03G9/087
摘要： PURPOSE:To obtain a high-quality image by adding specified pts. wt. of fine powder for rendering positive chargeability to the surfaces of toner particles of specified particle size. CONSTITUTION:Fine powder for rendering positive chargeability is added to the surfaces of toner particles of 2-9 mum average particle size produced by polymn. by 0.05-5 pts. wt. per 100 pts. wt. of the toner particles. The fine powder may be made of alumina (Al2O3), titanium oxide (TiO2), silica (SiO2) treated with aminosilane or stearic acid amide. A positively chargeable toner of uniform small particle size fit to form a high-quality image can be obtd.

34. 发明专利

JPH0353632B2 失效
公开(公告)号：JPH0353632B2
公开(公告)日：1991-08-15
申请号：JP3404479
申请日：1979-03-23
申请人： HITACHI METALS LTD
发明人： YAMASHITA KEITARO , GOTO TAKAHARU , ASANAE MASUMI
IPC分类号： G03G15/09
摘要： A method of electrophotography in which an electrostatic latent image is formed on the surface of a material layer and a non-magnetic cylinder is provided to confront the surface of said material layer. A permanent magnet roll made up of a plurality of symmetrically arranged magnetic poles extends axially in said cylinder. A magnetic brush is formed by attracting a semiconducting or insulating magnetic toner onto the cylinder with the aid of a magnetic attraction force of the permanent magnet roll. The cylinder and permanent magnet roll are moved relative to each other to permit the magnetic brush to slide along the surface of the material layer thereby to allow the magnetic toner to adhere at predetermined position on the surface of said material layer, and a toner image is transferred onto a transferring member and is then subjected to fixing. The cylinder and the permanent magnet roll are rotated in the same direction so that the magnetic toner is moved in the same direction as that of said material layer at a speed less than 100 mm/sec irrespective of the speed of movement of the surface of said material layer at a development section.

35. 发明专利

JPH0220878A POSITIVELY CHARGEABLE TONER 失效
公开(公告)号：JPH0220878A
公开(公告)日：1990-01-24
申请号：JP17037588
申请日：1988-07-08
申请人： HITACHI METALS LTD
发明人： GOTO TAKAHARU , ASANAE MASUMI , NOGUCHI KOJI
IPC分类号： G03G9/097 , G03G9/087
摘要： PURPOSE:To enhance conveyability and chargeability and to stably obtain a high-quality image by adding a specified amount of fine particles made of a melamine resin on the surface of toner articles. CONSTITUTION:The surface of the toner particles is coated with the 0.1-2.0wt.% fine particles of the melamine resin, thus permitting the chargeability of the toner particles to be stably maintained especially even in an elevated humidity, so improved in their temperature dependency, undesirable mutual attachment to each other particles to be prevented by coating the surface of each toner particle with said fine particles, and also nonelectrostatic attachment to the surface of a latent image bearing body to be avoided, and accordingly, conveyability and chargeability to be remarkably enhanced and high-quality images to be stably formed.

36. 发明专利

JPS63257764A MAGNETIC TONER 失效
公开(公告)号：JPS63257764A
公开(公告)日：1988-10-25
申请号：JP9232887
申请日：1987-04-15
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI
IPC分类号： G03G9/083 , G03G9/087
摘要： PURPOSE:To obtain an image having high quality by additionally fixing the fine powder of a silicone resin on the surface of a toner particle contg. a fixing resin and a magnetic powder. CONSTITUTION:The fine particle of the silicone resin is additionally fixed on the surface of the toner particle contg. the fixing resin and the magnetic powder. The particle size of the silicone resin fine particle is 0.2-3mum, and the additional amount of said particle is 0.1-1.0wt.% based on the titled toner. Thus, even in the case that the titled toner is the magnetic toner contg. an electric charge controller and having the high electric charge property, the fluidity of the toner is high and the occurrence of the blocking phenomenon is prevented, and the image having the high quality and image density is obtd.

37. 发明专利

JPS6342778B2 失效
公开(公告)号：JPS6342778B2
公开(公告)日：1988-08-25
申请号：JP9110979
申请日：1979-07-18
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI , YAMASHITA KEITARO
IPC分类号： G03G9/08 , G03G9/083

38. 发明专利

JPS62229259A ELECTROPHOTOGRAPHIC METHOD AND ITS DEVICE 失效
公开(公告)号：JPS62229259A
公开(公告)日：1987-10-08
申请号：JP7327486
申请日：1986-03-31
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI
IPC分类号： G03G15/00 , G03G21/00
摘要： PURPOSE:To obtains clear pictures having high quality from just after the start by preheating the surface of a photosensitive body to 20-30 deg.C. CONSTITUTION:A thermostat is so controlled that the surface temperature of an electrophotographic sensitive body which is provided with a photoconductive layer on a conductive substrate is 20-30 deg.C. Since the surface of the photosensitive body 1 is heated by a heating means 7 to keep the surface temperature in a prescribed temperature range and copying is performed in such a state, the temperature dependency of image is improved, and the clear pictures having high quality are obtd. from the start.

39. 发明专利

JPS62227163A IMAGE FORMING METHOD 失效
公开(公告)号：JPS62227163A
公开(公告)日：1987-10-06
申请号：JP7054286
申请日：1986-03-28
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI , KUMAKURA TOSHIO
IPC分类号： G03G15/09 , G03G9/08 , G03G9/083 , G03G15/16 , G03G15/20
摘要： PURPOSE:To improve transferability and fixability and to obtain a copied image high in image quality by controlling the electric conductivity of a conductive magnetic toner to 1X10 -1X10 mho/cm and its surface resistivity to 1kOMEGA-100MOMEGA. CONSTITUTION:An electrostatic charge image is formed on the surface of an image bearing drum coated with a dielectric, developed with a magnetic brush composed of the conductive magnetic toner, the developed toner image is transferred to a recording medium, and simultaneously fixed with pressure. In this image forming process, the conductivity of the toner is controlled to 1X10 -1X10 mho/cm, the surface resistivity is regulated to 1kOMEGA-100MOMEGA, and the toner contains a polyethylene wax, and a magnetic powder in an amount of 55-75wt%, thus permitting transferability and fixability to be enhanced, high-quality images free from bleeding and dropout of the images to be obtained.

40. 发明专利

JPS62182761A REVERSAL DEVELOPING METHOD 失效
公开(公告)号：JPS62182761A
公开(公告)日：1987-08-11
申请号：JP2472686
申请日：1986-02-06
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI , KUMAKURA TOSHIO
IPC分类号： G03G13/09 , G03G15/06 , G03G15/08 , G03G15/09
摘要： PURPOSE:To obtain a reversal image which has the especially high resolution and does not generate dust around the image, by giving a positive electrification characteristic to an image carrier and giving a negative electrification characteristic to a magnetic toner and applying a positive DC voltage to a sleeve. CONSTITUTION:Such characteristic is given to a toner 3 that it is electrified negatively with a polarity opposite to that of an electrostatic latent image formed on a photoconductive layer 1a, and the toner has a negative electric charge in the carrying stage by contacting between the toner 3 and a sleeve 4 or a doctor blade 6 and between toner particles. At the time of reaching the developing area, the toner 3 having the negative electric charge is stuck to the non-image part of the photoconductive layer 1a to form a toner image. This toner image reaches a transfer position by the rotation of a photosensitive drum 1, and a negative electric field having a polarity opposite to that of the electrostatic latent image is applied from the rear face of a transfer sheet to transfer the toner image onto the transfer sheet, and this image is fixed by a means using heat or pressure.

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