초록 ▼

The invention is directed to a metallic easy-opening can end, and to a method of manufacturing the same, the can end having a tear panel which is highly resistant to blowout pressure. The can end is first drawn between a preforming punch and a die to an outwardly open concave configuration, and is t

The invention is directed to a metallic easy-opening can end, and to a method of manufacturing the same, the can end having a tear panel which is highly resistant to blowout pressure. The can end is first drawn between a preforming punch and a die to an outwardly open concave configuration, and is thereafter compression scored between a scoring punch and a scoring anvil to reduce the thickness of the drawn metal, thus forming the removable tear panel.

대표청구항 ▼

A method of forming an easy opening end unit for a container, which end unit is resistant to blowout pressure from within said container, said method comprising the steps of providing a sheet material blank having an interior side; drawing an inner portion of the blank into a convex configuration, r

A method of forming an easy opening end unit for a container, which end unit is resistant to blowout pressure from within said container, said method comprising the steps of providing a sheet material blank having an interior side; drawing an inner portion of the blank into a convex configuration, relative to said interior side, of a predetermined depth and bounded by a surrounding region having a predetermined thickness; and compressing said surrounding region to reduce its predetermined thickness, whereby to form a web of reduced thickness bounding said inner portion, and to increase the predetermined depth of said convex configuration.