Envelopes – wrappers – and paperboard boxes – Paperboard box – With closure for an access opening
Patent
1998-02-06
2000-11-07
Garbe, Stephen P.
Envelopes, wrappers, and paperboard boxes
Paperboard box
With closure for an access opening
229213, 229249, 22912542, 229917, B65D 9300
Patent
active
061423645
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a container, notably a carton having a pull tab to assist opening of a sealed end of the carton.
BACKGROUND TO THE INVENTION
Many materials, notably fluids such as milk or fruit juices, are put up in sealed containers for transport and storage prior to use when the container is opened and the contents discharged. Many forms of containers are used for this purpose, but one form is a thin walled carton made from a thin card or plastic sheet material and having a generally squared or rectangular cross-section and a cuboid or brick-like overall shape. The contents of such a container are typically fed to the container through an open top end of the container, the other end being having been closed by folding over the basal portion of the side walls to form a boxed end to the container. When the desired amount of material has been fed to the container, the open top of the container is closed by forming transversely directed V folds in the upper portions of two opposed side walls, with the apexes of the Vs directed inwardly towards one another. This has the effect of bringing the top portions of the other two side walls of the container together to form a tented top to the container having a ridge lying along the line of indentation of the V folds. The ridge is then heat sealed or otherwise processed so as to secure together the opposed faces of the upper portions of the V folded and other side walls in a single linear transverse strip seal closure to the container, at least the major portion of the closure being located within the overall cross-sectional plan area of the container.
The sealed ridge is often then folded down about a transverse fold line located extending across approximate-ly the midpoint of one of the side walls of the tented top, so as to form a flat boxed end to the container. In some forms of such a closure, a tape which can be wire-reinforced is included in the line of the ridge, for example during folding over of the ridge material. This tape extends beyond the ends of the ridge to provide extensions which can be bent over to secure the folded down ridge in position by engaging the free ends of the tape under the lip formed along the edge of the boxed end where the V folded portion of the container wall is indented. Alternatively, the free ends of the extensions can be adhered or otherwise secured to the side walls of the container once the ridge has been folded down to form a boxed end to the container.
For convenience, the following terms will have the following means herein: type and will be referred to herein as such containers; opposed faces of the top end portions of the side walls of the container; edges of the wall material which has been brought together prior to forming the ridge seal; together the top end portions of the gabled and tent side walls of the container and which are secured together by adhesion between opposing faces at the interface between those opposing faces to form the ridge; the container by indenting the upper portions of two opposed side walls of the container to form the ridge to that end of the container; in the raised position either before or after forming the ridge seal; opposed side walls of the end of the container which have been indented by forming a V or other axial fold in the upper portion of the side wall so that the wall is collapsed laterally inwardly to form the gabled end to the container; sealed top which extend between the gabled side walls of the gabled end of the container; contact with the contents of the container, including the upper portions of such walls which are to be incorporated into the ridge seal; in contact with the contents of the container, including the upper portions of such walls which are to be incorporated into the ridge seal.
To open such a boxed end openable container, the seal at the interface between the opposing dry wall surfaces of the V fold at one end of the linear ridge seal is separated. This forms a pair of wings in the gabled end so that the plan view configuration from ab
REFERENCES:
patent: 2470199 (1949-05-01), Vivian
patent: 2687840 (1954-08-01), Innes
patent: 3204850 (1965-09-01), Wilcox
patent: 3520464 (1970-07-01), Pugh, Sr.
patent: 4821950 (1989-04-01), Sanchez et al.
patent: 4874126 (1989-10-01), Miller
patent: 4883222 (1989-11-01), Fujisawa
patent: 4946041 (1990-08-01), Poole
patent: 4982845 (1991-01-01), Prascak et al.
patent: 5333735 (1994-08-01), Focke et al.
patent: 5353985 (1994-10-01), Nagelie et al.
patent: 5516037 (1996-05-01), Okamoto et al.
Laker Jonathan Paul
Laker Kirk Anthony
Easycarton Limited
Garbe Stephen P.
Gunther, Jr. Charles D.
Mai Tri M.
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