초록 ▼

An improved tab opener and retained-tab easy-open structure and end closure assembly method are disclosed. The tab opener is fabricated from flat-rolled sheet metal to present a rounded edge periphery. In preparing an end closure for assembly on a can body, the tab opener is secured to the end closu

An improved tab opener and retained-tab easy-open structure and end closure assembly method are disclosed. The tab opener is fabricated from flat-rolled sheet metal to present a rounded edge periphery. In preparing an end closure for assembly on a can body, the tab opener is secured to the end closure such that the raw edge sheet metal of the rounded periphery is disposed outwardly in relation to the can body. The raw edge metal, scorelines, and other portions of the end closure needing repair can be repaired simultaneously after securing the tab opener to the end closure.

대표청구항 ▼

Manufacturing method for an easy-open sheet metal endwall closure for a container, comprising (A) providing a sheet metal endwall blank, (B) fabricating such endwall blank for use as an easy-open endwall closure including the steps of forming such blank to present a substantially planar panel, scori

Manufacturing method for an easy-open sheet metal endwall closure for a container, comprising (A) providing a sheet metal endwall blank, (B) fabricating such endwall blank for use as an easy-open endwall closure including the steps of forming such blank to present a substantially planar panel, scoring such panel to define a severable portion to be moved from the plane of such panel upon opening of a container, and forming a rivet button in the panel for use in securing a tab opener to such panel, (C) providing a sheet metal tab opener blank, (D) fabricating such tab opener blank for use as a tab opener having an elongated configuration with a working portion and a handle portion at longitudinally opposite ends, including the steps of folding over peripheral edge portions of such tab opener blank to form a double thickness of sheet metal with rounded edge at least around such handle portion and extending longitudinally along a major portion of the side edges of the tab opener blank toward such working end, such edge metal being folded over in a direction to be disposed outwardly when assembled on an end closure with raw edge metal accessible after assembly, and forming an aperture near the working end of the tab opener for placement over a rivet button, (E) placing such tab opener aperture over such rivet button in the panel portion of the end closure such that the folded-over edge metal of the fabricated tab opener is disposed outwardly, to provide for repair of such edge metal, when such end closure is prepared for assembly on a container, (F) converting such rivet button to a rivet to secure the fabricated tab opener to the fabricated end closure, and then (G) applying protective coating to such end closure including repair of such raw edge sheet metal at the periphery of such tab opener.