FR2488568A1 - Corrugated cardboard packing box - is made of unitary blank with edges of vertical walls folded into reinforcing tubes - Google Patents

Abstract

The box is formed from a sheet of corrugated cardboard (1) with cut (8-11) and fold lines defining a bottom panel. Two vertical walls (14,16) extend from opposite ends of the base, their opposite lateral edges being folded to form reinforcing corner tubes (32-35). Flaps (20,21) joined to the sides of the bottom fold against, and are glued to, these tubes. One of the walls (16) is extended at the top to form a cover (17) with peripheral flanges (24,25,26) glued to the tubes and to the top edge of the opposite wall.

Description

Corrugated cardboard box for packaging products in general.

The present invention relates to a corrugated cardboard box with reinforced corners for packaging products in general.

Boxes of this general type are known and commonly available commercially. They have the merit of allowing storage in a stack, regardless of the rigidity of their content, and above all they are capable of preventing the spillage of the content if they are turned up and down during loading and transport operations. , such known boxes are not without drawbacks among which we can note the large amount of material used in their manufacture, which reduces their competitiveness compared to other packaging, and the fact that they are ill-suited to display of products at their retail location, such as in supermarkets
The first object of the present invention is to provide a box which can be manufactured from a single piece of corrugated cardboard by simple manipulations such as suitable die cutting and which can remedy the defects of the usual boxes.

Another object of the present invention is to provide a box which can be used in any direction and can be manufactured without requiring the use of special manufacturing equipment, which is difficult to process, which has features considerable economic- from this very point of view.

These goals are achieved by a box characterized in that it comprises a piece of cardboard having cut lines and fold lines which are arranged so as to define a bottom from which two perpendicular walls extend upwards, the lateral edges of opposite walls forming tubular reinforcement corner edges, the edges of a wall being joined to those of the opposite wall by lateral lateral strips direct from the bottom of the box and adapted to be folded over said edges of corner in order to be glued on these, one of the walls extending at its upper part to form a cover provided with peripheral tabs intended to be glued on the edges of tubular corners and on the upper part of the opposite wall.

Other characteristics of the present invention will appear on reading the description of a preferred embodiment given below with reference to the attached drawings in which
your figure 1 is a perspective view of the box
in its closed condition; Figure 2 is a view
in perspective of the box of figure 1 with the neck
raised circle and figure 3 shows the piece
of cardboard used to make the box of figs
res 1 and 2.

Referring to the drawings, reference 1 designates, as a whole, the piece of corrugated cardboard comprising one or more layers. The piece of cardboard 1 is provided with two parallel fold lines 2, 3 extending longitudinally and with fold lines 4, 5, 6 and 7 which, outside the surface included between lines 2 and 3, are extended by cut lines 8, 9, 10, 11, 12, 13. Thus the piece is subdivided into several zones1 indicated by 14 to 26. With the box in its assembled condition, zones 14 and 16 form the two walls vertical opposite of the box, while the zones 15 and 17 respectively form the bottom and the cover thereof
Outside the fold lines 2, 3 of the bottom 15 are formed two respective lateral bands 20, 21 having wide cutouts 20a, 21a which, in addition to surrounding the bottom 15 on its periphery, also provide a connection between walls 14 and 16.

The fold lines 2, 3 and 7 define, around the cover 17, two tabs 24, 25 which can be folded down in the same plane as the respective lateral bands 20, 21, as well as a head band or d end 26 which can also be folded down on the external face of the vertical wall 14. Each part 18, 19 and 22, 23 is subdivided into three bands 27, 28, 29 by a pair of fold lines 30, 31 extending parallel to lines 2, 3. Advantageously, the central strip 28 has a greater width than the other two.

To assemble the box thus described, the tubular reinforcements 32, 33, 34, 35 (Figure 2) are first formed at the four vertical corner edges of the box.

To do this, the parts 22 are folded back on themselves so that the external strips 27 are adjacent to the internal surface of the walls 14 and 16, with the internal strips 29 extending perpendicular to said walls and the strips 28 extending diagonally between them.

Advantageously, between the external strips 27 and the sides 14, 16 is interposed an adhesive coating to make the tubular reinforcements even more rigid and prevent their opening. After completion of the formation of the tubular reinforcements, the walls 14, 16 are straightened perpendicular to the bottom 15 and fixed by means of the lateral strips 20, 21 which are folded upwards and then glued to the respective faces of the tubular reinforcements 32-35.

At this stage, the box already has sufficient stiffness to receive the product (s). The box is closed by folding the cover 17 over the tubular reinforcements of the wall 14 and by folding the tabs 24 to 26 downwards. The tabs 24, 25 are glued to the upper parts of the corresponding external faces of the tubular reinforcements on the lower parts of which the lateral strips 20, 21 have already been glued. The tab 26 is also glued to the upper outer edge of the wall 14.

We realize that the invention completely harnessing the goals. In particular, it should be noted that the box has considerable resistance with regard to maximum loads. In addition, its closed box-like structure makes it particularly resistant to torsional stresses
The tabs 24, 25 and the base lateral strips 20, 21 define openings which make it possible to visually check the product contained or packaged and also ensure a considerable saving of material without causing an appreciable reduction in the resistance of the box.

When. implementation of the invention the shapes and dimensions as well as the materials can vary to adapt to particular requests.

Claims (3)

1. A box, characterized in that it consists of a piece of cardboard (1) having cut lines (8,9,10,11) and fold lines (2,3,4,5) arranged so as to define a bottom (15) from which two opposite walls (14,16) extend perpendicularly towards the top, the lateral edges of the opposite walls forming tubular reinforcement corner edges (32,33,34,35), the edges of a wall being joined those of the opposite wall by side strips (20,21) - integral with the bottom of the box and adapted to be folded over said corner edges to be glued on them, one of the walls (16) extending at its upper part to form a cover (17) provided with peripheral tabs (24,25r 26) intended to be glued to the edges of tubular corners and to the upper part of the opposite wall. 2. A box according to claim 1, characterized in that the tubular corner edges (32,33, 34,35) are formed by providing, along the vertical sides of the opposite walls, parts (22) which are subdivided by fold lines (30,31 in three parallel strips (27,28,29), the central strip (28) having a greater width than the contiguous strip (29) of the vertical walls, said strips being folded one on the other others in such a way that the outermost strips are adjacent to and joined to the internal surfaces of the vertical walls by interposition of a bonding means. 3. A box according to claim 1, characterized in that the lateral strips (20,21) have, appreciably, a smaller height than the tubular corner edges, by which are defined, when the box is in its condition assembled, and in cooperation with said strips of the cover (24,25), openings or windows.