초록 ▼

A closure for a container, and a method for producing the same, wherein the closure includes an end panel and a plastic frame member connected together and which can be place over, or snapped onto, and then the frame member can be permanently attached and hermetically sealed to the flange of a metal

A closure for a container, and a method for producing the same, wherein the closure includes an end panel and a plastic frame member connected together and which can be place over, or snapped onto, and then the frame member can be permanently attached and hermetically sealed to the flange of a metal, glass, plastic or composite container or can. The interface of the end panel and frame member is such as to hermetically, seal the container and yet the end panel can be readily peeled from at least a portion of the frame member for gaining access to the interior of the container. A pull tab, or ring, is provided to assist in peeling the end panel to an open position. Depending on the manner of attaching or securing the end panel to the frame member, separation or peeling can result from an adhesive failing or from a cohesive failing of the material forming the frame member, or the end panel, or the adhesive.

대표청구항 ▼

[ I claim:] [1.]1. A method of forming a closure for subsequent attachment to a separate preformed container, the method comprising the steps of: forming an end panel having an integral pull tab at a periphery thereof; the method being characterized by the steps of inserting said end panel into a mo

[ I claim:] [1.]1. A method of forming a closure for subsequent attachment to a separate preformed container, the method comprising the steps of: forming an end panel having an integral pull tab at a periphery thereof; the method being characterized by the steps of inserting said end panel into a mold having a cavity for forming a frame member shaped to be permanently secured to a flange of the container; and injecting a plastic material into said mold cavity for forming said frame member and for attaching said end panel to said frame member, characterized in that said mold cavity is further provided with a portion for forming, during said molding injection step, a partial sealing strip overlying said end panel for preventing, in use, complete separation of said end panel from said frame member.