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    • 83. 发明授权
    • Perpendicular magnetic recording/reading apparatus
    • 垂直磁记录/读取装置
    • US06747830B2
    • 2004-06-08
    • US10227478
    • 2002-08-26
    • Koji Yano
    • Koji Yano
    • G11B503
    • G11B5/02G11B5/00G11B2005/001G11B2005/0029
    • The maximum external magnetic field of a magnetic recording medium longitudinal component which is applied to a magnetic recording medium is smaller than an absolute value Hn of a magnetic field at the intersection of a straight line connecting two points of an M-H curve in the longitudinal direction of a soft magnetic backing layer and a tangent of the M-H curve. One of the two points is a point (Hs, Ms) at which magnetization saturates in the first quadrant. The other of the two points is a positive intersection (0, Mr) of the M-H curve and the ordinate. The tangent is at a negative intersection (−Hc, 0) of the M-H curve and the abscissa.
    • 施加到磁记录介质的磁记录介质纵向分量的最大外部磁场小于连接MH曲线的纵向方向上的两个点的直线的交点处的磁场的绝对值Hn 软磁背衬层和MH曲线的切线。 两点之一是在第一象限中磁化饱和的点(Hs,Ms)。 两点的另一个是M-H曲线和纵坐标的正交点(0,Mr)。 切线处于M-H曲线和横坐标的负交点(-Hc,0)。
    • 87. 发明授权
    • Two-component electrophotographic developer with magnetic carrier
    • 具有磁性载体的双组分电子照相显影剂
    • US4614698A
    • 1986-09-30
    • US802315
    • 1985-11-27
    • Nobuhiro MiyakawaKoji YanoKazuo YamamotoTeruaki HigashiguchiYoshinobu Kawakami
    • Nobuhiro MiyakawaKoji YanoKazuo YamamotoTeruaki HigashiguchiYoshinobu Kawakami
    • G03G9/08G03G9/10G03G9/107G03G9/14
    • G03G9/107G03G9/0819G03G9/0823
    • A two-component electrophotographic developer for use in developing a latent electrostatic image of a low potential. The developer is composed of a mixture of a magnetic carrier of spherical sintered ferrite particles having raised and depressed portions attributed to the primary particles on their surface, a median size of from 30 to 50 micrometers, an apparent density of less than 2.6 g/cc and an electric resistance, measured in the form of a magnetic brush, of from 6.times.10.sup.4 to 2.5.times.10.sup.6 ohms and chargeable toner particles having a volume inherent resistivity of at least 1.times.10.sup.13 ohms-cm and a specific inductive capacity of from 4 to 6. In a preferred embodiment, the chargeable toner particles have a median size of from 10 to 14 micrometers and are substantially free from particles having a particle diameter of not more than 5 micrometers. The developer can give an image of a high density, a high resolution and excellent gradation without brush marks.
    • 用于显影低电位潜静电图像的双组分电摄影显影剂。 显影剂由具有由其表面上的初级颗粒引起的凸起和凹陷部分的球形烧结铁氧体颗粒的磁性载体的混合物组成,中值尺寸为30至50微米,表观密度小于2.6g / cc 以及以磁刷的形式测量的电阻为6×10 4至2.5×10 6欧姆,并且具有至少1×10 13欧姆 - 厘米的体积固有电阻率和4至6的电感率的可带电荷的调色剂颗粒。在 可充电调色剂颗粒的中值粒径为10-14微米,基本上不含粒径不超过5微米的颗粒。 开发者可以提供高密度,高分辨率和优异的无刷痕迹的图像。
    • 88. 发明授权
    • Method of manufacturing laser welded steel pipe
    • 激光焊接钢管制造方法
    • US09364921B2
    • 2016-06-14
    • US14004271
    • 2011-04-28
    • Koji YanoHiroyuki SumiKenji Oi
    • Koji YanoHiroyuki SumiKenji Oi
    • B23K26/262B23K26/28B21C37/08B23K26/06B23K26/32
    • B23K26/282B21C37/08B23K26/0608B23K26/262B23K26/32B23K2103/04B23K2103/50
    • A method of manufacturing a laser welded steel pipe by forming a steel strip into a cylindrical open pipe and performing laser welding on edges that includes: emitting two laser beams along the edges from an upper surface side of the open pipe, the two laser beams being transmitted through different optical fibers with in-focus spot diameters exceeding 0.3 mm; emitting leading and trailing laser beams each inclined toward a direction in which welding proceeds at an incident angle with respect to a direction perpendicular to an upper surface of the open pipe; setting the incident angle of the leading laser beam to be larger than the incident angle of the trailing laser beam; and setting a gap between a center point of the leading laser beam and a center point of the trailing laser beam on a back surface of the open pipe to 1 mm or larger.
    • 一种激光焊接钢管的制造方法,其特征在于,将钢带形成为圆筒状的开口管,并在边缘进行激光焊接,所述边缘包括:从所述开口管的上表面侧沿着边缘发射两束激光,所述两束激光束 透射通过不同的光纤,焦点光点直径超过0.3 mm; 发射前导和后退的激光束,每个激光束朝向相对于垂直于所述开放管的上表面的方向以入射角进行焊接的方向倾斜; 将前导激光束的入射角设定为大于后退激光束的入射角; 并且将开启管的背面上的前导激光束的中心点与后方激光束的中心点之间的间隔设定为1mm以上。