公开(公告)号：US4803584A

公开(公告)日：1989-02-07

申请号：US42340

申请日：1987-04-24

申请人： Hajime Doi ,  Norio Akai ,  Fujio Matsumoto

发明人： Hajime Doi ,  Norio Akai ,  Fujio Matsumoto

IPC分类号： G11B23/033 ,  G11B23/50 ,  G11B23/03

CPC分类号： G11B23/0332 ,  G11B23/505

摘要： A disk cartridge which comprises a cartridge case, a disk rotatably encased in the cartridge case, and a cleaning sheet supported on the inside surface of the cartridge case by welding, the cartridge case being composed of a thermoplastic synthetic resin, and the cleaning sheet being composed of non-woven fabric made mainly of acrylic fibers at least on the disk-facing side of the cleaning sheet and being fixed to the inside surfaces of the cartridge case by ultrasonic or heat welding has distinguished disk-handling characteristics and cartridge case-fixing characteristics.

公开(公告)号：US5082728A

公开(公告)日：1992-01-21

申请号：US586395

申请日：1990-09-20

申请人： Akira Miyake ,  Norio Akai ,  Tomizo Taniguchi

发明人： Akira Miyake ,  Norio Akai ,  Tomizo Taniguchi

IPC分类号： G11B5/82 ,  C09D5/23 ,  G11B5/73 ,  G11B5/735

CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/257

摘要： A magnetic disc with good abrasion resistance and improved durability, which comprises a non-magnetic substrate, a magnetic layer comprising a metal magnetic powder formed on one side of the substrate and a coating comprising an inorganic powder having a Mohs hardness of not less than 4 formed on the other, back side of the substrate, which has good abrasion resistance and improved durability.

摘要翻译： 一种具有良好的耐磨性和改善的耐久性的磁盘，其包括非磁性基板，包含形成在基板的一侧的金属磁性粉末的磁性层和包含莫氏硬度不小于4的无机粉末的涂层 形成在基板的另一个背面，其具有良好的耐磨性和改善的耐久性。

公开(公告)号：US4176847A

公开(公告)日：1979-12-04

申请号：US872753

申请日：1978-01-27

申请人： Norio Akai ,  Nobumasa Inoue ,  Kazuo Ohtani

发明人： Norio Akai ,  Nobumasa Inoue ,  Kazuo Ohtani

IPC分类号： G11B3/60 ,  G11B19/20

CPC分类号： G11B19/2009

摘要： The invention relates to a device for preventing a turntable for a record player from slipping off a shaft rotatably extending through a boss made of a metal fixed to the turntable. The turntable has integrally formed therewith slot means for receiving two bent ends of leg portions of a generally U-shaped retainer spring and a plurality of support projections. With the slot means and the plurality of support projections, the retainer spring is mounted to the turntable such that the leg portions thereof extend substantially in parallel to each other and across a circular axial end of the boss. The shaft is formed with a radial groove to receive the leg portions of the retainer spring. The plurality of support projections will serve as a spacer to keep the leg portions apart to prevent interference contact bwtween the leg portions and a bottom wall of the radial groove which otherwise would hamper smooth rotation of a turntable.

摘要翻译： 本发明涉及一种用于防止记录播放器的转盘从可转动地延伸穿过由固定在转盘上的金属制成的凸台的轴上的装置。 所述转台与其一体地形成有槽装置，用于容纳大致U形保持器弹簧和多个支撑突起的腿部的两个弯曲端。 利用槽装置和多个支撑突起，保持器弹簧被安装到转台上，使得其脚部基本上彼此平行延伸并且跨过凸台的圆形轴向端延伸。 轴形成有径向凹槽以接收保持弹簧的腿部。 多个支撑突起将用作间隔件以保持腿部分开，以防止腿部和径向凹槽的底壁之间的干涉接触，否则将妨碍转盘的平滑旋转。