Special receptacle or package – With pallet feature – Knockdown or collapsible type
Patent
1985-01-07
1986-08-19
Garbe, Stephen P.
Special receptacle or package
With pallet feature
Knockdown or collapsible type
206612, 206623, B65D 304, B65D 1740
Patent
active
046064621
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a powder proof container made of a plane punched out blank having a base material of cardboard or similar stiff material which on the surface thereof that is to become the inner surface of the container has a layer of a weldable material, and which container is joined to form a tube which is closed at both ends.
A container of this type is known from applicant's own Swedish Pat. No. 8105334-0 (equivalent to U.S. patent application Ser. No. 414,056). A tubular container of this type is well suited for packing of different types of goods, both liquid and dry goods. A container of this type generally is made by welding a bottom and a lid internally in the container tube utilizing the weldable layer of material at the inner surface of the container. There may be certain difficulties in opening such a container, and generally to open the container the top is cut through by means of a knife. There is also a possibility of providing a special tear open lid in the container. After the container has been opened the contents of the container tube must be consumed in one step or a separate reclosing lid must be applied to the container.
For facilitating the opening and emptying of the container and for providing a container having its own reclosing lid it would be an advantage if the container could be opened by a tear opening means extending round the tubes, whereby the tear opening separates the upper part of the container which can later be used as a reclosing lid. Tear opening means are previously known comprising a tear wire which from the inside of the container cuts the tube material through. The application of such tear wires, however, involves complicated and expensive steps in the manufacture of the container. It may also be difficult to cut through a weldable inner layer of the tube by means of a tear wire since the weldable layers of material generally are tenacious in their nature. It may also happen that the tear wire comes loose before having torn round the entire tube. Often tubular containers of this type are made with a longitudinally extending overlapped joint, and of course there are special problems in having a tear wire or a similar tear means cut through the double layer of material at the overlap joint.
The object of the invention therefore is to provide a powder proof container of the type mentioned above which is formed with a tear opening means extending round the container tube and which provides a simple, safe and quick separation of the upper part of the container tube, which separated part later can be used as a reclosing lid.
According to the invention the container tube is butt joined (edge to edge) and is kept together under sealed conditions by a joining strip extending along the entire joining edges and applied to the weldable layer at the inner surface of the container. The container is formed with a tear opening means extending round the entire container and the tear opening means is constructed in that the cardboard layer is partly cut through along two all around extending lines and to a depth ending some distance from the inner weldable layer of material, and said weldable layer of material in turn is cut through along cut lines extending all around the tube and provided inside of the two punch lines of the cardboard material and at a slight distance in said cardboard base material. At one edge the cardboard base material with the weldable inner layer has a portion projecting over the side edge and in contact with the outer surface of the container tube adjacent the longitudinal edge joint, and the said sidewardly projecting portion provides a tongue which can be seized by the fingers for enabling a tear opening of the container.
Further characteristics of the invention will be evident from the following detailed description in which reference will be made to the accompanying drawings. It is, however, to be understood, that the embodiments of the invention described and shown in the drawings are only illustrative examples and that many differen
REFERENCES:
patent: 2608341 (1952-08-01), Eckman
patent: 3145906 (1964-08-01), Corriuet
patent: 3561669 (1971-02-01), Postweiler et al.
patent: 3773248 (1973-11-01), Cecil et al.
Garbe Stephen P.
Nilles James E.
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