JP5329950B2 - Protective packaging material - Google Patents

Description

  The present invention is a protective packaging material for articles formed of a flexible and flat material, wherein the material is folded over its length, thereby forming two walls with juxtaposed parallel side edges, The present invention relates to a protective wrapping material in which the walls form a slit opened by a free edge of the material and the walls are connected to each other at their end faces to close the wrapping material.

  Protective wrapping materials for particularly bulky articles, such as automobile bumpers, have long been made with kraft paper, i.e. by techniques known in paper bag making. Multi-layered kraft paper is folded once in the length direction, so that two identical walls overlap. In this structure, for example, the end portion on the end surface side is closed by sewing the walls at the end portion on the end surface side of the formed wall. This results in a protective packaging that can be produced very easily. This protective wrapping material has slits at the side edges that extend over the length of the wrapping material. This slit can be pulled open to insert the bumper into a protective wrap similar to the formed envelope. For subsequent transport, the slit is closed by adhesive tape that stretches outside the wall and spans the slit.

Known protective packaging materials can be manufactured very simply and at low cost, but have certain disadvantages in handling operations. Care must be taken to carefully open and hold the slits or keep them open and to insert very long articles having a length usually exceeding 1.5 m. Accordingly, the article can be securely held in the packaging material before the slit is closed with the adhesive tape, and the article can be fixed and held so as not to fall. Until then, the structure is very unstable. Because the packaging material stands at the side edges formed by the folds to fill the article, the packaging material is likely to collapse with the article in some cases. This can cause the article to slip off and be damaged from the packaging, for example scratching.
Such a type of protective packaging material is known from German Offenlegungsschrift DE 1 073 380 B (Patent Document 1) and US Pat. No. 4,813,792 (Patent Document 2). .
German Federal Republic of Patent Publication No. 1 073 380 B US Pat. No. 4,813,792

  The problem underlying the present invention is to provide a protective wrapping material of the above kind which allows an improved handling operation without the need for cumbersome and costly production.

In order to solve this problem, according to the present invention,
A protective packaging material for articles formed of a flexible, flat material having multiple layers of kraft paper,
In order for the material to be folded over its length, thereby forming two walls with juxtaposed parallel side edges, this wall forming a slit opened by the free edge of the material and closing the packaging The protective packaging material, wherein the walls are connected to each other at the end on the end face side,
An open slit is formed in the wall away from the side edge,
In the above protective packaging material in which the side edges are formed by folding creases,
The outer layer of material is folded around at least one inner layer at the free edge forming the slit and adhered to the inner surface of the packaging,
Or
The inner layer of material is folded around the outer layer at the free edge forming the slit and is adhered to the outer surface of the packaging material.

In one embodiment of the invention, an open slit is located in the center of the wall.
However, you may arrange | position in the position which shifted the slit from the center, ie, the 1/3 of the right side or the left side of a packaging material, for example.

In one embodiment of the invention, the slits are formed with free overlapping edges of the wall.
Thereby, additional holding of the packaged article within the protective packaging material takes place.

In one embodiment of the present invention, the open slit extends over the entire length of the packaging material between the ends on the closed end face side.
Thereby, it is not necessary to partially close the formed slit before filling the article with protective packaging.

In one embodiment of the present invention, the connection at the end on the end face side is performed by bonding or sewing.
Both free edges of the material are butted against each other in the wall, forming an open slit between the ends on the end face side. The end portions on the end face side are connected to each other for closing the packaging material. Therefore, it is also possible to apply a known connection technique such as sewing, adhesion, welding, multiple bending, stamped connection, and main sewing.

In one embodiment of the present invention, a chamber is formed between the end portions on the end face side by the other lateral connection portion or the vertical direction connection portion.
Folding in the vertical direction creates two chambers. In some cases, the chambers can be filled with articles separately.

The handling operation of the packaging material according to the invention is further improved by the fact that the slits are formed by free overlapping edges of the walls.
With this overlap, there is an additional material for automatically closing the slit after filling the article.

  In a special embodiment, the compartments can be formed by other transverse or longitudinal connections between the end-side connections, possibly interrupted. Then, the packaging material can be wound or folded. Such a compartment is suitable for packaging, for example, fluorescent tubes.

In another embodiment of the invention, the material is folded twice in the longitudinal direction, so that the side edges are each formed by two folding folds.
Since the folding can be performed while forming the side folds, the completed packaging material is formed as a cassette.

  Since the open slit is formed in the wall, this wall is used as the upper wall of the packaging material. Since the slit can be pulled out on the upper surface formed by the upper wall of the packaging material, the lower wall is used as the bottom of the packaging material and can be placed flat on the table. Thereby, the protective wrapping is positioned in a stable manner during the insertion of an article, for example an automobile bumper. After the article is placed in the packaging material, the slits that are pulled open are sufficiently narrowed by the weight or shape of the article, so that inadvertent slipping of the article from the protective packaging material is actually prevented. In some cases, subsequently, the slit of the protective packaging material can be closed in a known manner. This is often unnecessary for internal company transport based on the structure of the protective packaging.

  The stability of the slit formed in accordance with the present invention and the tendency of the slit to close after the article has been packed into protective wrapping material is folded around at least the inner layer at the free edge where the outer layer of kraft paper forms the slit, And it is accelerated | stimulated by being adhere | attached on the inner surface of a packaging material. Thereby, the free edge of the kraft paper that defines the slit obtains a band-shaped reinforcement by the folded outer layer. This reinforcing portion enhances the shape stability of the free edge, and further prevents the material layer from being “frayed” at the free edge.

  In an alternative implementation, the inner layer of material is folded around the outer layer at the free edge forming the slit and adhered to the outer surface of the packaging.

  The packaging material is preferably formed in at least 3 layers, in particular 4 layers. In this case, the outer layer has a printable outer surface, and the inner layer forming the inner surface of the packaging material is smoothly formed on one side.

As the material, multiple layers of kraft paper are used.

  Next, the present invention will be described in detail based on the embodiments shown in the drawings.

  The protective packaging material according to the invention is made of multilayer kraft paper. Of these multilayers, only the outer layer 1 and the inner layer 2 are shown in FIG. 2 for simplicity. Layers 1 and 2 are folded in two places, with the crease forming the (lower) wall 4 and the side edge 3 of the upper wall 5. Thereby, the upper wall 5 consists of two wall parts 5a, 5b. In the center of the upper wall 5, the free edges 6 of both wall portions 5a, 5b are butted together to form an open slit 7 extending over the length of the protective packaging material.

  The walls 4 and 5 are connected to each other by a seam 9 at an end 8 on the end face side. As is known per se, this seam is formed by sewing with a string (not shown).

  The free edge 6 is protected as shown in FIG. This protection is formed by bending the outer layer 1 around the inner layer 2 in the range of the free edge 6 and bonding the outer layer 1 to the inner surface of the inner layer 2 with a strip-shaped adhesive 10 on the inner surface of the packaging material. As a result, the free edge 6 is covered by the fold of the outer layer 1, and the free edge as the defining portion of the slit 7 opened by the band-shaped adhesive 10 and the additional band-shaped layer of the outer layer 1 bent inward. Six strip-shaped reinforcements are produced.

  In FIG. 2, only one inner layer 2 is shown for simplicity. In order to ensure sufficient stability of the packaging material, it is advantageous to have a plurality of inner layers, in particular three inner layers. The open slits 7 defined by the seams 9 extend between the seams 9 over the entire length of the packaging material.

  Although the slit 7 is shown in the center of the upper wall 5 in the drawing, of course, when a sufficient distance is always maintained with respect to the side edge 3, as a modification, the slit is provided at a position shifted from the center of the wall 5. be able to. The minimum distance to the side edge is about 1/4 of the width of the wall 5.

  Furthermore, the wall portions 5a and 5b of the wall 5 can be formed so as to overlap each other. Thereby, the slit 7 forms a labyrinth closing member in the closed state. The overlap can be up to 20 cm, ie up to about 1/3 of the width of the wall 5. The overlap provides additional wall material for the packaging material filled with the article. Thereby, the slit 7 can be closed and the slipping-down of the inserted article can be prevented.

  The packaging material is also suitable for shapes having dimensions that are much larger than the width and depth. The packaging material has, for example, a length of more than 2 m, preferably more than 2.5 m, and a width of 0.5 to 0.75 m, preferably 0.6 to 0.65 m.

It is a top view which shows the upper wall of the protective packaging material which formed the slit. It is a cross-sectional view of the protective packaging material along line 11-11 in FIG.

DESCRIPTION OF SYMBOLS 1 Outer layer 2 Inner layer 3 Side edge 4 Lower wall 5 Upper wall 5a, 5b Wall part 6 Free edge 7 Slit 8 End part 9 Seam 10 Band-shaped adhesive

Claims (6)

A protective packaging material for articles formed of a flexible, flat material having multiple layers of kraft paper,
A slit in which the material is folded over its length, thereby forming two walls (4, 5) with parallel side edges (3) juxtaposed, this wall being opened by a free edge (6) of the material The protective wrapping material, wherein the walls are connected to each other at the end (8) on the end face side thereof to form (7) and close the wrapping material,
An open slit (7) is formed in the wall (5) away from the side edge (3),
In the above protective wrapping material in which the side edges (3) are formed by folding folds,
The outer layer of material (1) is folded around at least one inner layer (2) at the free edge (6) forming the slit (7) and adhered to the inner surface of the packaging material,
Or
A protective wrapping material, characterized in that the inner layer (2) of the material is bent around the outer layer (1) at the free edge (6) forming the slit (7) and adhered to the outer surface of the wrapping material.   The protective packaging material according to claim 1, characterized in that the open slit (7) is arranged in the center of the wall (5).   Protective packaging material according to claim 1 or 2, characterized in that the slit (7) is formed by an overlapping free edge (6) of the wall (5).   The protective packaging according to any one of claims 1 to 3, characterized in that the open slit (7) extends over the entire length of the packaging material between the closed end face side ends (8). Wood.   The protective packaging material according to any one of claims 1 to 4, wherein the connection at the end portion on the end surface side is performed by adhesion or sewing.   The protective wrapping material according to any one of claims 1 to 5, wherein a chamber is formed between the end portions on the end face side by the other lateral connection portion or the vertical direction connection portion.

Images