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    • 1. 发明授权
    • Rare earth magnet
    • 稀土磁铁
    • US07553561B2
    • 2009-06-30
    • US10566213
    • 2005-07-19
    • Takeshi SakamotoNobuya UchidaYoshitomo TanakaYasuyuki Nakayama
    • Takeshi SakamotoNobuya UchidaYoshitomo TanakaYasuyuki Nakayama
    • B32B19/00
    • H01F7/0221B32B15/011H01F41/026Y10T428/12937Y10T428/12944Y10T428/32
    • A rare earth magnet having excellent corrosion resistance is provided. It has a magnet body (10) containing a rare earth element, and a protective film (20) formed on the magnet body (10). In the protective film (20), a first protective film (21), a second protective film (22) and a third protective film (23) are laminated in this order from the side of the magnet body (10). These are in a polycrystalline state and composed of a metal plated film, for example. The first protective film (21) and the third protective film (23) have a smaller mean crystal grain size than that of the second protective film (22). Microcrystallization of the first protective film (21) can improve the density of the interface between the protective film (20) and the magnet body (10), and decrease the number of pinholes.
    • 提供了具有优异耐腐蚀性的稀土磁体。 它具有含有稀土元素的磁体(10)和形成在磁体(10)上的保护膜(20)。 在保护膜(20)中,从磁体(10)的侧面依次层叠第一保护膜(21),第二保护膜(22)和第三保护膜(23)。 这些处于多晶状态,例如由金属电镀膜构成。 第一保护膜(21)和第三保护膜(23)的平均晶粒尺寸比第二保护膜(22)的平均晶粒尺寸小。 第一保护膜(21)的微结晶可以提高保护膜(20)和磁体(10)之间的界面密度,并减少针孔的数量。
    • 4. 发明授权
    • Rare-earth magnet
    • 稀土磁铁
    • US07794859B2
    • 2010-09-14
    • US11540723
    • 2006-10-02
    • Takeshi SakamotoNobuya UchidaYoshitomo TanakaYasuyuki Nakayama
    • Takeshi SakamotoNobuya UchidaYoshitomo TanakaYasuyuki Nakayama
    • B32B15/04
    • C23C28/021C23C28/023C23C28/42H01F1/0577H01F41/026Y10T428/32Y10T428/325
    • A rare-earth magnet having a protective film for enhancing a corrosion resistance is provided. The protective film is a three-layer film including a first protective layer with a crystalline structure α (for example, a polycrystalline structure), a second protective layer with a crystalline structure β (for example, a columnar-crystalline structure), and a third protective layer with the crystalline structure α from the side near a magnet body. Since the adjoining first and second protective layers have different crystalline structures from each other, and the adjoining second and third protective layers have also different crystalline structures from each other, compactness among the three layers in the protective film may be improved. Therefore, development of a pinhole is restrained, and corrosion of the protective film can be restrained.
    • 提供了具有用于提高耐腐蚀性的保护膜的稀土类磁体。 保护膜是包括具有结晶结构α的第一保护层(例如多晶结构)的三层膜,具有结晶结构的第二保护层, (例如柱状晶体结构)和从靠近磁体的一侧具有结晶结构α的第三保护层。 由于相邻的第一和第二保护层具有彼此不同的晶体结构,并且相邻的第二和第三保护层也具有彼此不同的晶体结构,所以可以提高保护膜中的三层之间的紧密度。 因此,能够抑制针孔的发展,能够抑制保护膜的腐蚀。
    • 8. 发明授权
    • Optical recording method and optical recording medium
    • 光记录方法和光记录介质
    • US06999392B2
    • 2006-02-14
    • US09971703
    • 2001-10-09
    • Tatsuya KatoHajime UtsunomiyaHiroyasu InoueHiroshi ShingaiYoshitomo Tanaka
    • Tatsuya KatoHajime UtsunomiyaHiroyasu InoueHiroshi ShingaiYoshitomo Tanaka
    • G11B7/00G11B7/24
    • G11B7/24085G11B7/00454G11B7/006
    • Increase of jitter in a phase change optical recording medium is suppressed with no extreme decrease in the crystallization speed of the recording layer when the medium is overwritten at a high linear velocity. In addition, in a disk-shaped medium operated at a constant angular velocity, the overwriting is accomplished with the increase of jitter suppressed over the entire area of the medium. Provided is an optical recording method for recording a disk-shaped optical recording medium having a phase change recording layer which is rotated at a constant angular velocity, wherein amorphous recorded marks are formed in the recording layer. In this method, the minimum recorded mark is formed such that WL/ML incrementally or gradually decreases from the radially inner side to the radially outer side of the optical recording medium, when the minimum signal has a length of SL, and when the minimum recorded mark corresponding to said minimum signal has its maximum width of MW, EW is 0.1 MW; the position on the leading edge side of the recorded mark at the width of EW is designated effective leading edge; and the position on the trailing edge side of the recorded mark at the width of EW is designated effective trailing edge; the distance between the effective leading edge and the effective trailing edge is designated effective length ML; and the distance between the effective leading edge and the position at which the width starts to decrease on the trailing edge side is designated WL.
    • 当以高线速度重写介质时,抑制了相变光记录介质中的抖动的增加,而在记录层的结晶速度没有极度降低的情况下。 另外,在以恒定的角速度操作的盘形介质中,通过在介质的整个区域上抑制的抖动的增加来实现重写。 提供了一种用于记录具有以恒定角速度旋转的相变记录层的盘形光学记录介质的光学记录方法,其中在记录层中形成非晶体记录标记。 在该方法中,形成最小记录标记,使得W L L / M L L从光记录介质的径向内侧向径向外侧逐渐地逐渐减小 当最小信号具有长度为S L L时,当对应于所述最小信号的最小记录标记具有M W的最大宽度时,E W 为0.1MW; 记录标记的前缘侧的位置在E 的宽度被指定为有效前沿; 并且在E< W>宽度的记录标记的后缘侧的位置被指定为有效后缘; 有效前沿和有效后沿之间的距离被指定为有效长度M L L; 并且有效前沿与后缘侧宽度开始减小的位置之间的距离被指定为W L L。
    • 10. 发明授权
    • Method of forming a box-shaped structure from a foldable metal sheet
    • 从可折叠金属片形成盒状结构的方法
    • US4305340A
    • 1981-12-15
    • US126394
    • 1980-03-03
    • Takashi IwakiTakeji TanakaYoshitomo TanakaHiroshi Tanaka
    • Takashi IwakiTakeji TanakaYoshitomo TanakaHiroshi Tanaka
    • B21D5/01B21D51/52B21D51/06
    • B21D51/52
    • A safe box-like structure of good appearance is formed in a simplified manner from a flat metal sheet by folding at right angles the opposite side portions of a flat rectangular metal sheet, for instance, of a steel sheet to provide a channel-shaped metal sheet, forming in each end portion of the upright side sections of the channel-shaped metal sheet a diagonal crease extending from an inner end of a prescribed vertical fold line disposed substantially perpendicular to the bottom section of the bottom section of the channel-shaped metal sheet to the outer corner point of the end portion of the side section, pressing a triangular intermediate section between the prescribed vertical fold line and the diagonal crease inwardly of the channel-shaped metal sheet, folding the triangular intermediate section and an outer triangular section toward each other along the afore-mentioned prescribed vertical fold line and diagonal crease, and upbending opposite end portions of the channel-shaped metal sheet at right angles putting inside the wedge-shaped portions consisting of overlapped triangular sections which are formed at the joints of the adjacent side and end sections of the box-like structure, thereby precluding the dangers which would be otherwise invited by exposed wedge-shaped portions.
    • 通过将扁平矩形金属板(例如钢板)的相对侧部成直角地折叠,从简单的方式形成具有良好外观的安全的盒状结构,以提供通道形状的金属 在通道状金属板的直立侧部的每个端部中形成对角线的折痕,该对角折痕从大致垂直于槽状金属的底部的底部的规定的垂直折线的内端延伸 将所述侧面部的端部的外角部的片材压入所述规定的垂直折线与所述槽状金属片的内侧的对角折痕之间的三角形中间部,将所述三角形中间部和外侧三角形部分朝向 彼此沿着上述规定的垂直折线和对角折痕,并且向上弯曲通道形状的相对端部 在由形成在箱状结构的相邻侧面和端部的接头处的重叠的三角形部分组成的楔形部分的内部,从而排除了外露的楔形结构的另外的危险, 形状部分。