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51. 发明专利

JPS62182762A REVERSAL DEVELOPING METHOD 失效
公开(公告)号：JPS62182762A
公开(公告)日：1987-08-11
申请号：JP2472786
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 negative electrification characteristic to an image carrier and giving a positive electrification characteristic to a magnetic toner and applying a negative DC voltage to a sleeve. CONSTITUTION:Such characteristic is given to a toner 3 that it is positively electrified with a polarity opposite to that of an electrostatic latent image formed on a photoconductive layer 1a,and the toner 3 has a positive 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 positive 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 positive 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 the image is fixed through a means using heat or pressure.

52. 发明专利

JPS62127848A REVERSAL DEVELOPING METHOD 失效
公开(公告)号：JPS62127848A
公开(公告)日：1987-06-10
申请号：JP26878785
申请日：1985-11-29
申请人： HITACHI METALS LTD
发明人： ASANAE MASUMI , KUMAKURA TOSHIO
IPC分类号： G03G13/09 , G03G15/09
摘要： PURPOSE:To obtain a reversal image having high resolution without pick up of dust by using an electric charge type magnetic toner having an electrostatic charge characteristic of the polarity reverse from the polarity of an electrostatic latent image. CONSTITUTION:The sharp image having the improved resolution with the extremely little pick up of dust is obtd. by using the magnetic toner having the characteristic to be electrosatically charged to the polarity reverse from the polarity of the electrostatic latent image. Since the magnetic toner having the characteristic to be eletrostatically charged to the polarity reverse from the polarity of the electrostatic latent image is used, the magnetic toner appears to stick to the image part of the electrostatic latent image according to the previous way of thinking but in practice, the toner sticks to the non-image part of the electrostatic latent image. The magnetic toner having the electrostatic charge characteristic with which the quantity of the absolute value of the electrostatically charged by friction is in a 1-20muc/g range and the absolute value of the surface potential generated on the surface by the rotation of the toner is in a 10-90V range is preferably used.

53. 发明专利

JPS61141452A Magnetic toner 失效
标题翻译：磁性墨粉
公开(公告)号：JPS61141452A
公开(公告)日：1986-06-28
申请号：JP26375084
申请日：1984-12-15
申请人： Hitachi Metals Ltd
发明人： ASANAE MASUMI , KUMAKURA TOSHIO
IPC分类号： G03G9/083 , G03G9/097 , G03G9/08
CPC分类号： G03G9/083 , G03G9/09758
摘要： PURPOSE:To obtain an image good in image quality by attaching conductive particles made of polypyrrole to the surfaces of toner particles. CONSTITUTION:A metal-coating plastic film is formed into a colorless conductive compd. in a pyrrole soln. of an org. compd. by electrochemical reaction, and it is pulverized to form conductive particles, and attached to the surfaces of toner particles prepared by binding a magnetic power and a colorant with a resin to form a magnetic toner. Since the conductive particles are colorless, even when this toner is used as a magnetic color toner, a clear color image can be obtained. Since the conductive particles are attached to the surfaces of the toner particles, agglomeration of the magnetic toner can be avoided.
摘要翻译：目的：通过将由聚吡咯制成的导电颗粒附着在调色剂颗粒的表面上，以获得良好的图像质量。构成：金属涂层塑料薄膜形成无色导电体。在吡咯溶胶中。的组织 compd。通过电化学反应将其粉碎形成导电颗粒，并附着到通过用树脂粘合磁力和着色剂而制备的调色剂颗粒的表面以形成磁性调色剂。由于导电颗粒是无色的，所以即使将该调色剂用作磁性色调剂，也可以获得清晰的彩色图像。由于导电颗粒附着在调色剂颗粒的表面上，所以可以避免磁性调色剂的聚集。

54. 发明专利

JPS5929862B2 JPS5929862B2 - 失效
公开(公告)号：JPS5929862B2
公开(公告)日：1984-07-24
申请号：JP10944079
申请日：1979-08-28
申请人： Hitachi Metals Ltd
发明人： KUMAKURA TOSHIO , YAMASHITA KEITARO , ASANAE MASUMI , GOTO TAKAHARU
IPC分类号： G03G9/09 , G03G9/08 , G03G9/083
摘要： PURPOSE:To obtain a magnetic toner capable of dyeing fine print in a dry dyeing method by blending a binder, magnetic powder, a dye, electrically conductive particles, etc. in a specified ratio and using a binder having low wettability to the dye as the binder. CONSTITUTION:Waxes such as beeswax or paraffin wax having about 20-200 deg.C softening point, 500-10,000mol. wt. and low wettability to dye are used as a binder. 10-50wt% this binder, a 1-30wt% electrically conductive particles such as carbon black or metal powder and magnetic powder preferably having about 700-2,000G saturation magnetization quantity and about 50-400Oe coercive force are blended to form a magnetic toner showing 10 -10 OMEGAcm electric resistance when a DC 100V/cm electric field is applied.

55. 发明专利

JPS58167660A LEAD FOR WRITING 失效
公开(公告)号：JPS58167660A
公开(公告)日：1983-10-03
申请号：JP4918982
申请日：1982-03-29
申请人： HITACHI METALS LTD
发明人： NOGUCHI KOUJI , KUMAKURA TOSHIO
IPC分类号： B43K19/02 , C09D13/00
摘要： PURPOSE:A lead for writing, consisting essentially of a resin fixable by pressure and magnetite as main components, and prepared by melt kneading the components and solidifying the resultant kneaded material, having a high breaking strength, and scarcely erasing the recordings, e.g. letters or patterns. CONSTITUTION:A lead for writing prepared by incorporating a resin fixable by pressure, e.g. carnauba wax, a fatty acid (metallic salt) or polyethylene glycol (ester derivative) having preferably >=50 deg.C softening point, with magnetite at (80-20):(20-80) weight ratio, and if necessary melt kneading 0.1-20wt% carbon black with the resultant mixture, discharging the resultant kneaded material through a nozzle of a kneader, and cooling cna solidifying the extruded material.

56. 发明专利

JPS55540A PRODUCTION OF MAGNETIC TONER 失效
公开(公告)号：JPS55540A
公开(公告)日：1980-01-05
申请号：JP16271278
申请日：1978-12-28
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , AOYAMA TAKAFUMI , KUMAKURA TOSHIO , HAYANO TAKASHI
IPC分类号： G03G9/08 , G03G9/083
摘要： PURPOSE:To control the electric resistivity of toner optimum and achieve the improvement in flow characteristic by covering the surfaces of granular material which contains coloring materials and binder and have the specific particle sizes with magnetite fine powder. CONSTITUTION:Magnetite fine particle of preferably about 0.01 to 3mum in grain size is added and mixed at 2 to 30wt% to non-magnetic material particles containing coloring materials and binder of 0.5 to 100mum in particle size and are then subjected to heat treatment for a short time, whereby they are secured on the softened non-magnetic material particles. As a result, the electric resistivity becomes 10 OMEGAcm or over and the distinct images having sufficient densities may be obtained in transfer of not only CPC toner but also about 10 to 10 OMEGAcm.

57. 发明专利

JPS54154328A MAGNETIC TONER 失效
公开(公告)号：JPS54154328A
公开(公告)日：1979-12-05
申请号：JP6245678
申请日：1978-05-25
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , OGAWA IZUMI , KUMAKURA TOSHIO
IPC分类号： G03G9/08 , G03G9/09

58. 发明专利

JPS5498620A METHOD OF PRODUCING MAGNETIC TONER 失效
公开(公告)号：JPS5498620A
公开(公告)日：1979-08-03
申请号：JP15879678
申请日：1978-12-22
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , AOYAMA TAKAFUMI , KUMAKURA TOSHIO
IPC分类号： G03G9/08 , G03G9/087

59. 发明专利

JPS5451533A MAGNETIC TONER 失效
公开(公告)号：JPS5451533A
公开(公告)日：1979-04-23
申请号：JP11680577
申请日：1977-09-30
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , AOYAMA TAKAFUMI , KUMAKURA TOSHIO , HAYANO TAKASHI
IPC分类号： G03G9/08 , G03G9/083

60. 发明专利

JPS5447657A MAGNETIC TONER 失效
公开(公告)号：JPS5447657A
公开(公告)日：1979-04-14
申请号：JP11333877
申请日：1977-09-22
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , AOYAMA TAKAFUMI , KUMAKURA TOSHIO
IPC分类号： G03G9/08 , G03G9/087

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