Envelopes – wrappers – and paperboard boxes – Paperboard box – Box material includes a coating or a nonpaperboard...
Patent
1984-12-06
1986-11-25
Garbe, Stephen P.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Box material includes a coating or a nonpaperboard...
383120, B65D 3700, B65D 3520
Patent
active
046244077
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a package, comprising a basic cardboard, which is double-folded as the covers of a book and between whose halves is affixed with an adhesive to the surface of each half a paper or paperboard for sealing the side edges of a package. The invention is also directed to a method for fabrication of such a package.
This type of package is disclosed in the Applicant's U.S. Pat. No. 3,926,364. A drawback in this prior art package is that the paper sealing the side edges of a package is easily ripped and a product to be packed will slip out through a ripped-up side edge.
A similar type of package is also set out in the Applicant's Canadian Patent publication No. 1 131 534. The same drawback is present there as well, since the side edge is sealed by a single layer of paper at the side edge folding.
An object of the invention is to provide the above type of package which can be fabricated with as little material consumption as possible by means of a simple automatic machine at a high rate of production in a manner that the side edge of a package will be sealed either with pasteboard or two-layer paper.
This object is achieved on the basis of the characteristics of the invention set out in the annexed claims.
One embodiment of the invention will now be described in more detail with reference made to the accompanying drawings, in which
FIG. 1 shows the blank of a package according to the invention in one intermediate stage of fabrication and
FIG. 2 is a section taken along line II--II in FIG. 1.
FIG. 3 is a perspective and partially cut-away view of a finished package.
First to be described is the design of a package. A basic cardboard 1 is folded the same way as the covers of a book, a bending line 4 forming the bottom of a package. Affixed with an adhesive to one side face of basic cardboard 1 is a sheet of paper 2, whose edges are double-folded and glued to each other for a two-layer paper 3. This two-layer paper 3 is folded at side edge 6 of a package and affixed with an adhesive to the other half of basic cardboard 1, said other half having no sheet of paper 2. Thus, the side edges of basic cardboard 1 will be sealed with two-layer paper, as shown in FIG. 3. Sheet of paper 2 may be replaced with a slightly thicker sheet of pasteboard for eliminating the need for twofold edge portions 3.
The bottom bending line 4 of basic cardboard 1 is so located that one half of the basic cardboard will be longer than the other, the longer half being provided with a bending line 5 for separating a closing flap 7.
A bending line 6 for the ends of paper or pasteboard sheet 2 is located between the cardboard halves slightly inside the side edges of cardboard 1, the edges of cardboard 1 protecting a wrapped-up product from blows. When said side edge bend 6 is provided with a two-layer paper 3 or a tough, thin pasteboard, the side edges won't be torn open when packing a product.
On the other hand, this package can be fabricated with a simple automatic machine at a high rate of production. The following description will deal with the fabrication method of such package. A cardboard web to be run from a supply roller is cut into rectangular cardboard lengths 1. Another supply roller is run at approximately half of the previous rate to deliver paper web, whose width is approximately double compared to that of cardboard web 1. Prior to the cutting stage, the edges of paper are double-folded and glued to each other for two-layer paper 3. Even after this folding, the width of paper web substantially exceeds that of cardboard 1. Thereafter, the paper web is cut into paper sheets 2 whose length is approximately half of that of cardboard 1. A paper sheet 2 is placed on cardboard 1 according to FIG. 1 so as to extend a small distance beyond the bottom bending line 4 of a future package. One edge lies close to a bending line 5 separating said closing flap 7. The lengthwise center axes of cardboard 1 and sheet 2 join each other. An adhesive has been applied to the top of cardboard 1 within the zone covered by sheet
REFERENCES:
patent: 1112042 (1914-09-01), Ullman
patent: 1373222 (1921-03-01), Bushnell, Jr.
patent: 1682458 (1928-08-01), Ahlquist
patent: 3063610 (1962-11-01), Rhoten
patent: 3765596 (1973-10-01), Garrod
patent: 4325507 (1982-04-01), Janhonen
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