초록 ▼

This relates to a closure unit which may be inserted into an open end of a tubular container body, particularly one formed of paperboard or plastic material, and which will have an automatic interlock with the container body and a seal sufficient to hold the closure unit in sealed relation with resp

This relates to a closure unit which may be inserted into an open end of a tubular container body, particularly one formed of paperboard or plastic material, and which will have an automatic interlock with the container body and a seal sufficient to hold the closure unit in sealed relation with respect to the container body under all normal usages without the use of adhesive. The interlock between the closure unit and the container body is in the form of a plurality of retaining lugs which are resiliently deflected when the closure unit and container body are assembled and which have a pressure engagement with the interior surface of the container body to form an interlock therewith.

대표청구항 ▼

An end closure for tubular container bodies, said end closure comprising an end panel having axially inner and outer surfaces, said axially inner surface including a peripheral radially outer surface area for engaging in abutting relation an extreme end of a container body, and retaining means proje

An end closure for tubular container bodies, said end closure comprising an end panel having axially inner and outer surfaces, said axially inner surface including a peripheral radially outer surface area for engaging in abutting relation an extreme end of a container body, and retaining means projecting from said axially inner surface, said retaining neans being in the form of peripherally spaced lugs, each of said lugs having a separate resilient connecting portion joined to said end panel within the confines of said peripheral area, each of said lugs including an anchoring head carried by said connecting portion and having a cam surface adjacent a free end thereof for engagement with a container extreme end to position said lugs, said cam surface having a radially inner portion thereof lying within an axial projection of said peripheral surface, said anchoring head also including a roughened anchoring surface lying intermediate said cam surface and said connecting portion and generally lying within said axial projection of said peripheral surface and a depending centering lug disposed between each pair of said lugs.