B - Operations – Transporting – 67 – B
Patent
B - Operations, Transporting
67
B
226/90
B67B 3/00 (2006.01) B67B 3/12 (2006.01)
Patent
CA 1059086
ABSTRACT OF THE DISCLOSURE A method for the closure of a vessel provided with a neck with an external screw thread and a sealing surface on the outside of the neck between the screw thread and the mouth of the vessel, wherein a preformed metal capsule is placed over the mouth of the vessel, which capsule comprises a closed flat head and a skirt, the inner surface of the head being lined with a layer of sealing material, and the capsule, with the skirt directed downwardly, is pressed downwards against the mouth of the vessel with the aid of a downwardly moving hollow die in such manner that, after such movement, the sealing material covers not only the inner surface of the head of the capsule, but also a part of the inner surface of the upper part of the skirt which adjoins the inner surface of the head, and further, during the downward movement, the hollow die compresses the sealing layer between the sealing surface of the vessel and the upper part of the skirt, after which a screw thread is formed in a lower part of the skirt through the lower part of the skirt being pressed inwardly against that part of the neck of the vessel which is provided with the screw thread. According to the invention, the inner surface of the die which engages the capsule during the closure of the vessel is bevelled.
254640
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