Cebal

Jacques Granger

Bottle cap

The invention relates to a process for the production of a lead-based capping cap, in which preparation takes place by rolling of an alloyed lead metal strip covered on each of its two faces by an alloyed tin film, characterized in that a multilayer plastics material strip is prepared having an adhesive plastics material surface layer and at least two successive layers of a plastics material from the group of polyolefins, grafted polyolefins and terpolymers; the two strips are joined by applying the adhesive face of the plastics material strip to one of the two faces of the metal strip, thus giving a complex strip, and from said complex strip is cut a blank and the latter is converted into a cap internally coated with plastics material. The invention also relates to the capping caps, or cap overseals, obtained, internally having at least two plastics material layers. These caps are used for over-capping the corks of wine, alcohol or spirit bottles. Their internal coating prevents lead migration into the bottle contents in use and makes it possible to reduce the lead weight of the caps.

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Libourne, France

Jacques Granger