| 摘要 |
PURPOSE:To improve productivity, by applying a magnetic disk with dropout detection test, and binding completely both upper and lower cases to only passed disks after said test. CONSTITUTION:Each positioning means has press-in fitting structure and serves as a temporary coupling means 24, so both cases 2 and 3 are coupled temporarily with each other while positioned. In this temporary coupling state, the magnetic disk is tested for dropout detection and when passed, the disk is sent to a case binding stage as it is. Namely, at the binding stage, an ultrasonic wave is applied to sealing parts 6 and 7 for binding both upper and lower cases 2 and 3 while the upper case 2 is pressed against the lower case 3, and consequently the sealing parts 6 and 7 are bonded together by compression. On the other hand, after both upper and lower cases 2 and 3 of a rejected disk are released from the temporary coupling state, only the magnetic disk 10 is repaced and a test of it is taken again. |
