Package making – Methods – Plural covers
Patent
1983-09-26
1986-12-09
Bell, Paul A.
Package making
Methods
Plural covers
53399, 206441, 229 87R, B65B 1158
Patent
active
046272232
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a package blank, comprising a flat, rectangular cardboard sheet and a wrapper element made of a flexible material. The invention also relates to a packaging method, employing a package blank according to the invention.
One prior art package comprises a pouchlike wrapper element between the halves of a cardboard sheet, folded like the covers of a book, the goods to be wrapped being placed in said wrapper which also retains the goods between the halves of a protective covering made up by said cardboard sheet. This type of package requires that various sizes of packages be used respectively for goods of various bulks and amounts. The manufacture amd assortment of a selection comprising a plurality of package sizes nevertheless requires extra work.
In another prior art package type, a package is manufactured by means of an automatic machine simultaneously with the wrapping of goods to be packed in a manner that a wrapper element is first wrapped around the goods and then attached to a cardboard sheet which is bent around the wrapper element and the goods contained therein. This requires an expensive automatic machine on a packaging site. However, it would often be preferable that packages were prefabricated to a sufficient degree so that the actual wrappinig could be later effected manually.
SUMMARY OF THE INVENTION
An object of the invention is to provide an above-described type of package blank which can be readily, quickly and manually loaded with a varying bulk of goods.
To achieve this objective, a package blank of the invention is characterized in that a separate wrapper element is adhered by gluing transversely to the surface of a cardboard sheet.
Such a package blank is extremely economical as to its material costs and, moreover, can be manufactured at high production rate with a relatively simple machinery.
When empolying such a package, the wrappinig operation according to the method of the invention is effected so that a product to be wrapped, which is narrower than the width of said cardboard sheet, is wrapped in said wrapper element and the ends of said carboard sheet are folded around the open sides of wrapper element into overlapping relationship against each other and that around the package if tightened a binding strip, extending transversely of the cardboard sheet and urging the freely extending edges of the cardboard sheet towards each other.
A particularly protective and durable package is accomplished this way.
In a preferred embodiment of the invention, the side edges of the cardboard sheet of a package blank are double folded and glued to provide side edge reinforcements that are narrow relative to the width of said cardboard sheet. Such edge reinforcements are of particular significance in view of the strength of a finished package in order to avoid cutting of a binding strip into the edge portion of a cardboard sheet and to make the outstanding corner portions resist blows and impacts as effectively as possible, so that such blows could not reach and damage the articles to be wrapped up.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following description, some embodiments of the invention are illustrated with reference to the accompanying drawings, in which
FIG. 1 is a perspective view of a package blank of the invention;
FIG. 2 shows a package made up from the package blank by the method of the invention;
FIG. 3 shows a package of the invention in perspective view during the packaging operation;
FIG. 4 shows a package of FIG. 3 in finished condition; and
FIG. 5 is a perspective view of a package blank according to another embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A package shown in FIG. 1 comprises two elements, namely a rectangular, flat cardboard sheet 1 and a wrapper element 2 made of a flexible material. In the present embodiment, the wrapper element 2 is a single continuous strip, adhered only by its central region to the surface of a cardboard sheet 1 substantially to the central area of
REFERENCES:
patent: 2011703 (1935-08-01), Barker
patent: 2071232 (1937-02-01), Langehenning
patent: 3217868 (1965-11-01), Champlin et al.
patent: 3253379 (1966-05-01), Foradora
patent: 3986657 (1976-10-01), Angelini
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