| 摘要 |
A magnetic disc jacket heat sealing apparatus for heat sealing thermally fusible tabs of a magnetic disc jacket. The apparatus includes a base on which the jacket is placed in folded form in order to be heat sealed, with the heat sealing being carried out while the base is heated to a temperature in the vicinity of the softening point of the jacket material. Such an arrangement eliminates distortion caused by residual thermal stress ascribable to a difference in temperature between the side of the jacket heated by a sealing mold and the side of the jacket contacting the base.
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