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US 4,521,266 AGranted
Method of manufacturing corks for bottles
AssigneeSugherificio P. Careddu S.p.A.
InventorFranco Careddu
Life of this patent
Estimating the term…
Abstract
The method of manufacturing corks consists of punching the corks out from a block which is formed by moulding and then baking. At least one of the major surfaces of the block forms part of a sheet made from strips of natural cork previously placed side-by-side and glued together, with their pores arranged parallel to the plane of the said surface, the remaining portion of the block consisting of cork agglomerate.
Claims2
A method of manufacturing corks comprising the steps of:
- forming a first and a second sheet from strips of natural cork disposed side-by-side and glued together and with the pores of the cork extending parallel to the plane of the said sheet,
- placing said first sheet on the bottom of a mold,
- placing a mixture of granulated cork and binder in said mold on said first sheet,
- placing said second sheet in said mold over said mixture of cork and binder,
- pressing and baking in said mold the composite formed by said two sheets and mixture so as to form a parallelpipedal block having a control core of agglomerated cork and two major surfaces defined by said sheets,
- smoothing said two major surfaces of said parallepipedal block, and
- punching the said block in a direction perpendicular to its major surfaces to form the corks.
4 more elements
A method of manufacturing corks comprising the steps of:
- forming a sheet from strips of natural cork disposed side-by-side and glued together and with the pores of the cork extending parallel to the plane of said sheet,
- placing said sheet on the bottom of a mold,
- placing a mixture of granulated cork and binder in said mold on said sheet,
- pressing and baking in said mold the composite formed by said sheet and mixture so as to form a parallelepipedal block comprising a block of agglomerated cork bonded to said sheet with said sheet on one of the major surfaces of said block,
- smoothing the two major surfaces of said parallelepipedal block, and
- punching the said parallelepipedal block in a direction perpendicular to its major surfaces to form the corks.
3 more elements
Dependencies are inferred from the claim text.