| 摘要 |
PCT No. PCT/SE97/00633 Sec. 371 Date Oct. 14, 1998 Sec. 102(e) Date Oct. 14, 1998 PCT Filed Apr. 15, 1997 PCT Pub. No. WO97/38920 PCT Pub. Date Oct. 23, 1997A fixator for a disc-shaped object includes a substantially flat and unbroken lower end plate, a substantially flat upper end plate and an intermediate portion having slots constructed and arranged to hold the disc-shaped object therein. The intermediate portion is formed of at least two layers, including a lower intermediate layer adjacent the lower end plate a formed of unconnected right and left arms having a larger, generally U-shaped slot therebetween having a width less than the diameter of the disc-shaped object such that a peripheral portion of the disc-shaped object held in the fixator will rest upon the arms of the lower intermediate layer, with the larger slot being joined to a smaller slot, and an upper intermediate layer formed of unconnected right and left arms having a larger, generally U-shaped retaining slot therebetween having a width which is substantially the width of the disc-shaped object, such that an edge portion of the disc-shaped object is retained between the arms of the upper intermediate layer, the larger retaining slot being joined to a smaller slot.
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