Heat bondable container closure
AssigneePolystar Packaging, Incorporated
InventorIhab Hekal
Life of this patent
Estimating the term…
Abstract
This relates to an end closure for conventional types of containers which may be in the form of glass or plastic jars and bottles or in the form of specially formed metal containers having a folded outwardly projecting annular rim at the top thereof. The end closures are constructed so as to be snapped in place on the containers thus retaining the closures on and keeping the containers closed by a mechanical interlock between the respective closure and container. Further, the end closures have heat-bondable surfaces which when subjected to low temperature heat, such as by heating the rims of the containers or by heating the packaged product within a retort cooker, the heat-bondable surfaces of the end closures will bond to the touching surfaces of the container.
Claims16
An end closure for closing containers having radially outwardly directed closure retaining projections, said end closure comprising, before attachment to a container, an outer rim member having an inwardly directed ledge defining an inner product dispensing opening, a panel seated on said ledge and closing said product dispensing opening, a bonding member carried by said rim member and having a surface heat bondable to a container, and one of said rim member and said bonding member being positioned for snap engagement with a container closure retaining projection for initially retaining said end closure on a container.
A closed container unit comprising a jar-like container, said container having a rim portion formed with at least one projection for receiving a closure, an end closure snapped on said rim portion in interlocked relation with said projection for initially attaching said end closure to said container, and then a heat bond being formed between said end closure and said projection.
Dependencies are inferred from the claim text.