FIELD: instrument making.
SUBSTANCE: invention relates to heat sealable seal containing a base attached to inner seal by temporary binder. Internal seal is equipped with tab, whole surface of which is folded back once over surface of inner seal in contact with corresponding surface of base. Seal comprises laminar material, which includes a reinforcing layer and sheet made of conducting material, on lower surface of which is coated with heat sealable film, temporary binder is applied on entire surface of inner seal when lug is folded back. On entire thickness of laminar material passes recess with tab length folded parts formed by tab after it is folded, less than length of recess.
EFFECT: invention also relates to production of packing.
13 cl, 3 dwg
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