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US4797764A Recording disk with low total indicated runout 失效
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Recording disk with low total indicated runout
摘要:
A magnetic recording medium disk with substantially improved tolerances comprising:a hub including a center portion and recessed flange portion, the center portion having a planar drive surface; magnetic medium, including a side zero and a side one; and an adhesive bonding the side one of the medium to the flange of the hub, wherein the side zero of the medium is fixed a precise, desired distance .alpha. from the plane of the drive surface and the total indicated runout of the hub used divided by the total indicated runout of the distance .alpha. is greater than one. A method and apparatus for manufacturing a magnetic recording medium disk with substantially improved tolerances by applying ultrasonic vibrations to the medium and a hot melt adhesive until the precise desired distance .alpha. is achieved.
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