Apparatus for heat sealing magnetic disc jackets

Details Apparatus for heat sealing magnetic disc jackets Apparatus for heat sealing magnetic disc jackets

1986-03-21

1988-10-18

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With work cooling means

156227, 1565834, 206444, 360133, 428 65, 428900, B32B 3120

Patent

active

047785586

ABSTRACT:
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.

REFERENCES:
patent: 2651350 (1953-09-01), Casey et al.
patent: 3428512 (1969-02-01), Cooper
patent: 3449887 (1969-06-01), Abramson
patent: 4062718 (1977-12-01), Hay
patent: 4601689 (1986-07-01), Finkle et al.

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