| 摘要 |
1,175,615. Grinding. DISC PACK CORP. 5 Sept., 1967 [16 Sept., 1966], No. 40592/67. Heading B3D. The sides of a memory disc 25 are ground to a finish by honing stones 27, 29 (or abrasive tapes) which are reciprocated radially to ensure that the whole recording area of the disc is abraded. The disc 25 is supported at the periphery of the central aperture in the disc and is rotated by a motor 137 and drive 143 while honing stones 27, 29 are reciprocated rapidly across the sides of the disc by air-driven oscillators 149. The machine is operated automatically from an angled control panel 47. When the operator depresses start button 51, a cover 41 is closed by a motor, and a clamp 127 is moved towards the disc by a pneumatic cylinder 109. The honing stones 27, 29 are then moved into engagement by pneumatic cylinders 147 vehicle lubricant is sprayed through nozzles 31 supplied from a reservoir 35 by a pump 37. The disc 25 is rotated while the honing stones are rapidly reciprocated in a radial direction. After a period of time. the honing stones are retracted and the lubricant flow discontinued, the disc then being dried by air directed through nozzles 33. In the embodiment in which abrasive tape is employed, Figs. 6-9 (not shown), each tape is wound up a small amount on spools (237) at the end of a grinding cycle to present a fresh abrasive surface for the next disc, such indexing being effected by a ratchet wheel (247) which is attached to the take-up spool and operated by the movement of the abrasive tape mounting arrangement. |
