DE29614417U1 - Corrugated cardboard folding box - Google Patents

Description

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PATENT ATTORNEYS

Karl Marks

Dipl.-Ing. Sigurd Leine ■ Dipl.-Phys. Dr. Norbert König admitted to the European Patent Office European Patent Attorneys

Burckhardtstrasse 1 D-30163 Hannover

Our sign

610/001 drk/si

Telephone (0511) 62 30 05 Fax (0511) 62 2105

Date

14.08.1996

Corrugated cardboard folding box

The invention relates to a corrugated cardboard folding box with handle openings.

These are corrugated cardboard folding boxes, especially known as so-called moving boxes, which have simple handle openings without folding, which has the disadvantage that the heavily used handle area tears easily because the handle area is only one layer.

In order to improve the strength in the handle area, it is already known to provide two handle holes, one in the side wall of the box and one in a foldable flap. The foldable flap is folded over the side wall so that the two holes lie on top of each other (hole-on-hole folding), creating a stronger, two-layer handle opening. But even this handle hole design still has a tendency to tear, especially when the box is pulled.

The object of the present invention is to design a corrugated cardboard folding box of the type mentioned at the beginning in such a way that the handle hole area is further reinforced and thus becomes even more stable.

This object is solved by the inventions according to claims 1 and 2.

Advantageous and expedient further developments of the task solutions are specified in the subclaims.

The invention according to claim 1 provides a three-layer upper handle opening area, whereby a

A considerable increase in strength is achieved in the carrying area of the handle opening. Such a handle opening is good for pulling upwards with your fingers. However, it is also possible to carry out the well-known hole-on-hole folding mentioned above, for which the flap is folded as a whole onto the inside of the folding box.

The invention according to claim 2 achieves the three-layer structure around the entire handle opening, so that in addition to the advantages of the invention according to claim 1, the advantage is also achieved that the folding box can also be pulled downwards with fingers without the risk of tearing the handle opening.

The inventive design according to claims 1 and 2 makes it possible to use lighter and thus cheaper types of paper with the same strength in the supporting area, i.e. in the handle opening area, than in known two-layer folding boxes.

The invention will be explained in more detail below with reference to the accompanying drawings, which show exemplary embodiments.

It shows

Fig. 1 a blank of a first embodiment of a corrugated cardboard folding box (in the unfolded

condition) and

Fig. 2 shows a blank of a second embodiment of a corrugated cardboard folding box (in the unfolded state).
30

Identical components in the figures of the drawing are provided with the same reference symbols.

Fig. 1 and 2 show blanks 2 and 4 of corrugated cardboard folding boxes, whereby in the drawing a dash-dotted single line represents a single groove produced on a corrugating machine, a dash-dotted double line represents a cut produced on the corrugating machine, a through-

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an area delimited by drawn lines means an area punched out or perforated for breaking out produced by a tool, a dashed single line and a dashed double line mean a single or double groove produced by a tool.

In the folding box according to Fig. 1, the two narrow side walls 6, 8 have known punched or perforated oval handle openings 10, 12, whereby the cut or perforation is guided along the straight line 14, the two sheets 16, 18 up to the points 20, 22. The two dashed lines 24, 26 represent grooves, so that the partially punched or broken-out parts 25, 27 of the oval handle openings 10, 12 can be folded inwards twice around the grooves, whereby the distance between the two grooves 24, 26 is approximately equal to three times the thickness of the corrugated cardboard.

When the box is folded up, as is also known per se, flaps 28, 30, which are pivotally connected to the side walls 6, 8 by means of double grooves 29, 30 and have handle holes 32, 34 associated with the handle openings 10, 12, are folded inwards so that the handle openings 10 and handle holes 32 or handle openings 12 and handle holes 34 can be covered to achieve a two-layer handle area.

In the folding box according to Fig. 1, double grooves 36, 38 are provided running centrally across the flaps 28, 30 and their handle holes 32, 34, forming two flap halves 40, 42, 40', 42' that can be folded onto one another, thereby enabling the flap halves to be folded into half holes. The folded flap halves are then folded inwards around the double grooves 44, 46 between the flaps and the side walls onto the inner surface of the side walls 6, 8, so that in this way a three-layer wall thickness of the side walls is created above the longitudinal center lines of the handle openings, thereby increasing the strength in the load-bearing area of the folding box.

The embodiment according to Fig. 2 differs from the embodiment according to Fig. 1 in that instead of the

Handle holes 32, 34 in the central double groove 36, 38 of the flaps 28, 30, two handle holes 48, 50 and 52, 54 are provided on the flap halves 40, 42 on both sides of the double grooves 36, 38 at the same distance from them. The side walls 6, 8 have handle openings 56, 58 which are designed in the same way as the handle openings 10, 12 of the folding box according to Fig. 1, but have the same distance from the double groove 44, 46 as the handle holes 50 and 54 of the flaps 28, 30 adjacent to the double groove.

When folding the boxes, first of all the outer flap halves 42, 42' are folded inwards onto the inner flap halves 40, 40' so that the two handle holes 48 and 50 or 52 and 54 come to rest on top of each other. Then the folded flap halves 40, 42 and 40' and 42' are folded inwards onto the inner surfaces of the side walls 6, 8 so that all three openings or holes 32, 48, 50 or 34, 52, 54 are covered and a three-layer wall thickness of the side walls is obtained up to under the handle openings 32, 34 up to approximately the dotted line 55, whereby a three-layer structure and thus increased strength is achieved around the entire handle openings. This also makes it possible to pull the box downwards with your fingers without the risk of tearing the handle openings.

The elevation shown in the figures of the drawing with the reference number 59 shows the course of the wave of the corrugated cardboard.

The reference numerals 60, 61, 62 and 63 indicate the usual handle openings in the wide side walls 64, 66 for carrying the folding box on the shoulder.

After the folding process, the partially punched-out parts 25, 27 can be folded up around the three-layer handle wall to create so-called folded handles. The reference numbers 68, 70, 71, 72, 74 and 75 indicate the folding parts that form the base of the folding box.

Claims (3)

V K CTN K PATENT ATTORNEYS Karl Marks Dipl.-Ing Sigurd Leine ■ Dipl.-Phys. Dr Norbert König admitted to the European Patent Office European Patent Attorneys Burckhardtstrasse 1 0-30163 Hanover Our sign 610/001 drk/si Telephone (0511) 623005 Fax (0511) 622105 Date 14.08.1996 Expectations 1. Corrugated cardboard folding box with handle openings in the narrow side walls and with flaps which can be folded inwards around double grooves onto the inner surface of the side walls and which have handle holes which can be folded onto the handle openings in the side walls, characterized in that the flaps (28, 30) have a double groove (36, 38) running centrally across the flaps and their handle holes (32, 34), by means of which two flap halves (40, 42; 40', 42') which can be folded onto one another are formed, which, when folded onto one another, result in a half-hole fold and, when folded onto one another, can be folded inwards onto the inner surfaces of the side walls (6, 8) around the double grooves (44, 46) provided between the flaps (28, 30) and the side walls (6, 8) in order to fold the half-holes onto the handle openings (10, 12) in the side walls (6, 8). 2. Corrugated cardboard folding box with handle openings in the narrow side walls and with flaps which can be folded inwards around double grooves onto the inner surface of the side walls and which have handle holes which can be folded onto the handle openings in the side walls, characterized in that the flaps (28, 30) have a double groove (36, 38) running centrally across the flap, by means of which two flap halves (40, 42; 40', 42') which can be folded onto one another are formed, and that handle holes (48, 50; 51) which can be folded onto one another are provided in the flap halves (40, 42; 40', 42') at the same distance from the double groove (36, 38). 52, 54) which can be folded onto one another by folding the folded flap halves inwards onto the inner surface of the side walls (6, 8) onto the handle openings (10, 12) of the side walls. 5 3. Corrugated cardboard folding box according to claim 1 or 2, characterized in that the handle openings (10, 12) in the side walls (6, 8) are only partially punched out or can be broken out via perforations and that the only partially punched out or broken out parts (25, 27) of the handle openings are connected to the upper edge of the handle openings via a first groove (24) and have a second groove (26) running parallel to the first groove, the distance of which from the first groove corresponds approximately to three times the thickness of the corrugated cardboard, so that the parts (25, 27) can be folded inwards around the upper edge of the handle openings folded over one another.