Rasselstein Hoesch Gmbh

Werner Erfgen

Reiner Sauer

Rainer Sauer

The invention relates to a can lid consisting of a lid ring and a lid membrane having an end face, wherein the lid ring has an annular flange configured as a flattened roll on its inner periphery and surrounding an opening, the end face of said annular flange being directed radially outward and the lid membrane being connected with the annular flange so as to be flat for sealing the opening. A can lid designed according to the present invention should result in fewer injuries during normal handling and should be more resistant to corrosion as a result of the folding under of the peripheral area of the lid membrane.

Can lid

For the manufacture of a ring part out of a flat sheet-metal part to form a lid for a lid of a can. A hot-sealable coating is provided on one side of the sheet-metal part which is then shaped into a cylindrical tube with the coating being on the inside. The axially extending edges of the tube are joined together to form a butt-joint and the inside surface thereof pressed against a cooling plate. A butt-joint welding seam is then created by means of a laser jet. The tube is separated into equal length tube sections and each is conically enlarged at one end. The other end of each tube section is bent radially inwardly to form a bearing surface for a tear-off foil. By flanging the conically enlarged end, an annular flange is created to receive a body of a can.

Method for the manufacture of a ring part out of sheet metal for a lid of a can

An easily-opened can lid includes a cover ring having an outer edge and an inner edge. The inner edge folds inwardly to form an annular flange surrounding a lid opening. A tear-off portion aligned about the annular flange has a lateral area covering the entirety of the lid opening such that the lid opening is smaller than the tear-off portion. An attachment tab is secured at a location on the lateral area of the tear-off portion and an opening ring is secured to that attachment tab. An outside edge of the tear-off portion can be aligned with the inside edge of the cover ring so that the annular flange is entirely covered by the lateral area of the tear-off portion. Heat sealing coatings can be applied to the lateral area of the tear-off portion on a bottom side thereof and to the top side of the annular flange to secure the cover ring to the tear-off portion.

Easily-opened can lid

A method of manufacturing an easy-opened lid from sheet metal is disclosed, wherein an opening is stamped in the lid and the stamped out portion is utilized in manufacturing the lid, thus reducing loss of lid material.

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Melsbach, Germany

Werner Erfgen