A PACKAGE AND METHOD FOR FABRICATION THEREOF

Abstract: A basic cardboard (1) is double-folded as the covers of a book and glued between the halves is paper (2) for sealing the side edges of a package. For stiffening the side edges, the edges of said sheet (2) of paper are double-folded and glued for two-layer paper (3). These two-fold marginal or edge portions (3) of said paper sheet (2) are folded along a bending line (6) providing the side edge of a package and the two-fold paper is affixed to each half of basic cardboard (1), the side edge of a package thus being sealed with two-layer paper.

Description: Package and method for fabrication thereof. 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 paper- board 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 US Patent publication 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 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 character¬ istics 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 fabric¬ ation 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 slight¬ ly 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. OMPI 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 rect¬ angular 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 substant¬ ially 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 furture 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 2 for fixing the opposite faces of sheet 2 and cardboard 1 to each other. However, the adhesive- covered area does not extend quite up to the edges of cardboard 1. The adhesive-covered area extends to the zone of two-layer paper 3 but stops a small dis¬ tance short of bending line 6 of two-layer paper 3. Thereafter, the twofold marginal sections 3 of sheet 2 are bent along bending lines 6 and an adhesive is applied to either or both of those faces of the bent marginal sections of paper sheet 2 and cardboard 1 , which will be against each other as cardboard 1 is double-folded along bottom bending line 4. It will be appreciated that following this the twofold margianal section 3 of paper sheet 2 will be affixed to both OMPI halves of cardboard 1 , the side edge of cardboard being thus sealed by two-layer paper. A sheet of paper 2 can be replaced with tough, thin, flexible pasteboard whose ends need not be double- folded. Still achieved is improved strength combined with low consumption of material and high-speed fabric¬ ation technique. It will be appreciated that all steps in the method can be carried out with simple machinery at a high rate of production since all that is required is cutting off the webs, double-folding them, and apply¬ ing an adhesive. It should also be appreciated that the relative posit¬ ioning of various sections and application of an adhes¬ ive do not require great accuracy. A sheet of paper or pasteboard 2 is substantially easier to place in a proper position than positioning separate marginal strips (see Canadian Patent publication 1 131 534). OMPI >> VvTPO

Claims: Claims 1. A package, comprising a basic cardboard (1) which is double-folded as the covers of a book and between whose halves is fitted a paper or pasteboard (2) affix¬ ed with an adhesive to the face of each half for seal¬ ing the side edges of a package, c h a r a c t e r ¬ i z e d in that paper or pasteboard (2) is a rectangul¬ ar sheet whose folded ends are glued to the inner face of one half of said basic cardboard, between the ends of paper or pasteboard (2) said basic cardboard alone providing a package confining wall, while the other wall of a package is provided by superimposed layers of basic cardboard (1) and paper or pasteboard (2). 2. A package as set forth in claim 1, wherein said sheet (2) between the halves of basic cardboard (1) is made of paper, c h a r a c t e r i z e d in that the side edges (3) of a sheet of paper (2) affixed to the inner face of one cardboard half are double-folded and glued for two-layer paper, that this two-layer paper is double-folded at the side edge (6) of a pack¬ age, and that affixed within the side edge zones to the face of each cardboard half is two-layer paper, the side edge of a package thus being sealed with two- layer paper. 3. A package as set forth in claim 2, c h a r a c t ¬ e r i z e d in that said sheet of paper (2) extends a small distance beyond the bottom fold (4) of basic cardboard (1) . 4. A package as set forth in claim 1, 2 or 3, c h a r a c t e r i z e d in that the edge of paper or pasteboard sheet (2) is close to the bending line (5) of a basic cardboard closing flap (7) . O PI 5. A package as set forth in claim 5, c h a r a c t ¬ r i z e d in that said bending line (6) of the two- layer sheet of paper or pasteboard for sealing the edge of a package is positioned between the halves of basic cardboard (1) inside the edges of said basic cardboard and that the adhesive seam between paper or pasteboard sheet (2) and basic cardboard (1) lies at a small distance from said bending line (6) . 6. A method for fabrication of a package as set forth in claim 1 , in which method a basic cardboard is double- folded as the covers of a book and a paper or paste¬ board is affixed with an adhesive between the halves of said folded basic cardboard for sealing the side edges of a package, c h a r a c t e r i z e d in that a con¬ tinuous paper or pasteboard web delivered from a supply roller is cut into sheets (2) of paper or pasteboard, that each sheet (2) is glued to the face of a basic cardboard (1) substantially within the zone of one ' half of said basic cardboard (1), that the ends of paper or pasteboard sheet (2) are double-folded at (6) the side edge of a package, and that these folded ends are affixed with an adhesive to that half of basic card¬ board (1) which has substantially no paper or paste¬ board sheet (2) thereon. 7. A method as set forth in claim 6, c h a r a c t ¬ e r i z e d in that the side edges of a continuous paper web delivered from a supply roller are double- folded and glued for two-layer paper (3) , that the paper web is cut into sheets of paper which are glued to the face of basic cardboard (1) substantially with¬ in the area of one half of said basic cardboard (1 ) , that said two-layer paper (3) on the edges of a paper sheet is double-folded at (6) the side edge of package, and that the folded edge portion of a paper sheet is affixed with an adhesive to that half of basic card¬ board (1) which is substantially free of paper sheet.

Inventors: JANHONEN VEIKKO ILMARI, JANHONEN, VEIKKO, ILMARI
Applicants: JANHONEN VEIKKO ILMARI, JANHONEN, VEIKKO, ILMARI
Application year: 1984
Main classification: B65D61
IPC codes: B31B41, B65D30, B65D33, B65D75