DE3819678A1 - Protective corner made of corrugated board, ribbed board, solid board for packaging purposes and method of manufacturing it - Google Patents

Abstract

Published without abstract.

Description

The invention relates to a protective corner and methods for its Manufacturing.

When transporting general cargo, most are the corners of the individual General cargo at risk.

Even if a piece good, e.g. B. an electrical device, a machine or piece of furniture, individually in a packaging cardboard (a box) is packed, so the corners are always still at risk since the material thickness does protect the Areas are sufficient, such as along the edges, but often not at the corners. Of course it would be too expensive (also regarding disposal), if the carton were so thick that the corners would be easily and securely protected. On the other hand, you often need a box, even if only one Protection of the corners is really necessary (perhaps because the piece good otherwise relatively insensitive).

You therefore already have extra protective corners on the corners of pieces well attached for protection during transport - be it within a Packaging boxes or without this, in the latter case the General cargo can be sealed in a plastic film.  

The previous corner protectors are ready to use a relatively large room. They could be finished Protective corners stacked in their finished spatial form be, but this is cumbersome or with a smaller number hardly practicable.

One could prefabricate the protective corners lying flat and thus superimpose flat and such blanks only on Set up and fix the place of use to the protective corner. For this but would be cumbersome plugs or adhesive device necessary, which makes these procedures very difficult sword and become more expensive.

In contrast, the invention is based on the object To create a protective corner that is glued but lying flat is adjustable, that is, only at the moment of use from the flat shape can be erected into the erected spatial corner shape is.

The solution to this problem is specified in claim 1 and will be explained in more detail with reference to the drawing.

These corner protectors can continuously be used as individual pieces on ent machines or machines that have been set up continuously be made from tape material.

A particularly efficient process for automatic production is however specified in claim 2. After that you can Protective corners surprisingly by means of a machine Production of erection boxes made (glued, shaped and laid flat) by making such a finished one Box part is divided into four protective corners.

According to claim 3, this cutting can be prepared and thus he be made easier by already punching the blanks (before they are sent to the box machine) the dividing lines along the vertical and horizontal means lines are pre-perforated. This perforation must be designed in this way be that the box cut perfectly by the machine is transported, but then the finished, ge glued and laid flat part of the box in four protective corners can be separated.  

The protective corners can be made of single or multi-layer material be made.

You can use plastic foam on the inside, be it PU or Pe foam or other foams, made for sensitive surfaces be dressed.

They can be self-adhesive on the inside the.

These protective corners are right from the start good on the corner as they keep the tendency to stand out from the to return to the flat position (clamping effect when Placing the protective corners on the object to be protected).

It is also favorable that there are always units to four corners, because e.g. B. in a piece of furniture usually four corners or eight corners ge need to be protected.

The invention is described below with reference to the drawing explained in more detail.

Fig. 1 shows a plan view of a blank for a protective corner according to the Invention.

In plan view, the blank essentially has the shape of a square, which is divided into four fields 1 , 2 , 3 , 4 a / b . Between fields 1 and 2 , a bending line 1/2 is grooved, pressed or perforated into the material (corrugated cardboard, ribbed cardboard or the like). A slot 2/3 is punched out between the fields or tabs 2 and 3 , depending on the material thickness. Otherwise, the field 3 is trimmed or beveled on its two outer edges.

A further bending line 3/4 a is provided between the field 3 and the field 4 a . Finally, the field 4 b is connected via a bending line 4 b / 1 to the field 1 in an articulated manner.

According to the invention, a further bending line 5 extends diagonally across the field 4 a / b , namely from the central corner point 6 to the outer corner point 7 .

Fig. 2 shows this protective corner schematically in the finished, but flat state.

If you take (or an automat) the fields 2 and 3 and bring them to cover, the cut according to FIG. 1 is automatically erected into a spatial corner shape. In fact, the field 3 is glued to the field 2 during production, with a good, large area connection between the fields 2 and 3 being obtained with good pressure.

As explained at the beginning, this rigid spatial shape is unfavorable for storage and shipping. According to the invention, a diagonal bending line 5 is now seen in the field 4 a / b , and preferably this bending line is formed by perforation cuts. Around this bending line 5 , the field 4 a / b can be bent slightly inwards in such a way that the field parts 4 a / b come to lie on one another and between field 3 and field 1 . The protective corner according to the invention can therefore be stored in a relatively very small space and delivered to the place of use. At the place of use, i.e. in the case of packaging, the flat protective corner can easily be erected into the spatial corner shape (it has a slight tendency to stand up, which makes handling easier). However, the protective corner "does not" want to erect completely either, rather, thanks to the bending line 5 , there remains an inward inclination - that is, an inclination to adhere to the corner of the packaged goods.

Fig. 3 shows the protective corner in perspective in the finished, upright state.

Fig. 4 shows a plan view of a blank for an erecting box part, with perforation lines for dividing into four protective corners according to the invention.

As can be readily seen later, the upright folding box blank according to FIG. 4, known per se, can be broken down into four protective corners by cutting along the vertical center line 8 and the horizontal center line 9 . In fact, according to the invention, the finished, flat box part, as supplied by a box gluer known per se, is cut along these two center lines 8 , 9 . To facilitate cutting, these center lines are pre-perforated on the box machine.

Fig. 5 shows schematically a flow chart for the manufacture of protective corners according to the invention by means of an automatic machine for erecting boxes or box or folding box gluing machines.

Claims (3)

1. Protective corner made of corrugated cardboard, corrugated cardboard, solid cardboard for packaging, characterized in that the protective corner is formed by four preferably square fields ( 1 , 2 , 3 , 4 ), of which two fields ( 2 , 3 ) are glued flat one above the other, and that one (the middle) of the other two fields ( 4 ) has a diagonal fold line ( 5 ) for folding together or erecting the protective corner. 2. Process for the manufacture of protective corners according to claim 1, characterized in that erecting boxes by means of a known device, in particular a box gluing machine, and the box parts (lower part or upper part) along the vertical and horizontal central axis ( 8 , 9 ) in four protective corners Splits. 3. The method according to claim 1, characterized in that the two parting lines ( 8 , 9 ) are already pre-perforated when punching the blanks, to facilitate the parting process.