GB2025792A - Ribbed Millboard or Corrugated Paper - Google Patents

Abstract

A ribbed millboard or corrugated paper which has the side opposite to the ribs - or one side - faced by a sheet of paper or relatively thin millboard, a coating of adhesive being applied to the backs of the ribs or on the peaks of the corrugations and the ribs being formed with notches at regular intervals which form bend lines for the sheet.

Description

SPECIFICATION Ribbed Millboard or Corrugated Paper The invention relates to ribbed millboard or corrugated paper which has the side opposite to the ribs,-or one side-faced by a sheet of paper or relatively thin millboard.

Such a material, particularly faced ribbed millboard, is well-suited for packing, particularly for packing sensitive or fragile objects. Due to its flexibility and its ability to stretch, this ribbed millboard can be used "direct from the roll" in automatic packing machines, for rolling up and packing each object. Its flexibility and ability to stretch also gives the finished package greater strength and robustness. The ribs are compressible and, as a result, the packaging or casing provides good impact-damping. The ribs rest against the goods and the facing sheet lies outermost, so that the package is substantially smooth on the outside.

Due to the foregoing favourable properties, such ribbed millboard is preferred for packing individual items such as goods made of ceramics, particularly ceramic sanitary ware, or household appliances and machines or electrical equipment.

Such faced ribbed millboard is also suitable for use in the vehicle construction industry as a packing material and/or protective casing or protective covering. Motor scooters and motorcycles in particular, but also other machines, are relatively heavy and bulky. It is therefore very easy for a scooter, for example, or for a machine to be damaged on its way from manufacture of final assembly to the purchaser.

Damage to paintwork, soiling such as finger prints or the accumulation of dust may often be involved.

It is therefore expedient to protect the vehicles, vehicle parts or other machines from such damage by a relatively cheap casing, and in particular to protect them from soiling and becoming dusty. Although the known packing papers or the faced ribbed millboard mentioned in the introduction can be used for this purpose, these have the disadvantage that such packing materials or covering or casing materials do not lie sufficiently securely on the goods to be packed.

The casing or covering material can in some instances slip off. If the casing or covering is torn away at just one point, which can happen very easily if the material lies slightly away from the packed goods, then the whole casing or covering can come off; the cost and effort of packing has then all been for nothing and the goods can become heavily soiled as a result. In addition, it is difficult to apply the casing or covering with such a smooth material. An object of the invention is to providing a relatively cheap material for encasing or covering goods or parts of goods and which reduces the foregoing disadvantages.

According to the invention there is provided a ribbed millboard or corrugated paper, which has the side opposite to the ribs-or one side-faced by a sheet of paper of relatively thin millboard, characterised in that a coating of adhesive is applied to the backs of the ribs or on the peaks of the corrugations, and that notches are formed at regular intervals in the ribs or peaks of the corrugations.

Due to the layer of adhesive, the casing or covering material therefore no longer lies loosely or at a distance from the goods to be packed, but sticks to them securely. The casing or covering can therefore no longer simply slip off to one side or be torn away or torn off. The ribbed millboard or corrugated paper is therefore easier to apply, and it resists the stresses which arise during transportation and storage better. However, it can be removed easily and without a trace by the purchaser. As the adhesive coating is applied only to the backs of the ribs or corrugations, only a small amount of adhesive coating material is used, and above all the ribbed millboard adheres only along strip-like areas. The. individual adhesive.

points therefore lie close enough to each other to adhere securely but, due to the gaps between the adhesive layers, the material can be pulled off again easily. The adhesive glue applied to the ribs or corrugations has, as is known in the adhesives industry, a much greater affinity for the packing material than it has for the goods to be packed, so that it is released from the packed goods without leaving a residue when the casing or covering is pulled off.

The said notches provide a multiplicity of bending lines which extend transverse to and also obliquely to the corrugations or ribs, and lie parallel to each other. This ribbed millboard or corrugated paper therefore also shapes itself around goods to be packed which have a complicated spatial form, so that the paper also sticks well to projecting parts, which are particularly vulnerable, and protects these satisfactorily.

Preferably, the notches are shallower than the height of the ribs or corrugations. The notches are, in such a case, impressed so that, although they provide clear bending lines, the material of the ribs is not excessively strained thereby.

Finally, the ribbed millboard according to the invention can be further developed by offsetting the notches on each rib in the longitudinal direction of the ribs, relative to the notches in the two adjacent ribs; preferably they are offset by half the distance between two adjacent notches on a rib. In the direction transverse to, thus perpendicular to the ribs, there is therefore an aligned notch on every second rib, which is sufficient for forming a bending line transverse to the ribs. On the other hand, obliquely to the ribs there are also bending lines which are defined by a notch on each rib; without this arrangement of notches, however, the forming of bending lines obliquely to the ribs would be more difficult than exactly perpendicular to the ribs.

Due to the notches, the millboard does not stick to the packed goods uninterruptedly along the length of the ribs, but there are interruptions at intervals formed by the notches, thus the lines are interrupted longitudinally, or are in the form of dashed lines. This is sufficient to provide adhesion, but favours the releasing of the covering or casing.

The invention will now be described by way of example only with reference to the accompanying drawings in which Figure 1 is a plan view of part of a sheet of ribbed millboard in accordance with the invention, and Figure 2 is a cross-section of part of the sheet of Figure 1 on the line Il-Il in Figure 1.

In the drawings one side of the sheet of millboard 1 parallel ribs 2 are buiit up. The side of the sheet opposite to the ribs 2 is faced with paper 3.

As explained above, the backs of the ribs have a coating 4 of an adhesive glue, so that the ribbed millboard sticks well to the object to be packed.

Furthermore, notches 5 are impressed or otherwise formed in the ribs at regular intervals, so that the packing material also has a number of preformed bending lines transverse to the ribs, via which the material can readily be shaped around the goods to be packed.

The notches 5 extend at right angles to the ribs 4 and are offset on each rib relative to the notches on the two adjacent ribs. The notches 5 are offset in that way by half the distance between two adjacent notches 5 on a rib. The sheet can be bent easily at right angles to the ribs along a row of notches 5 or can be bent obliquely to theribs along a generally aligned set of notches.

It will be seen from Figure 2 that the notches 5 are shallower than the height of the ribs 2.

The adhesive 4 is of the type which will have a greater affinity for the ribs 2 than for the surface to which it is-to be applied. In this manner, the sheet and adhesive can be pulled from the surface without leaving an adhesive residue on the surface.

The application of the adhesive 4 in strip-like layers and the provision of notches 5 also aids in the removai of the sheet from a surface to which the sheet has been applied. However, the adhesive layers are arranged sufficiently close to each other to ensure secure adhesion of the sheet to the surface.

The invention is particularly applicable to ribbed millboard, but it can also be applied to corrugated paper. A corrugated paper has the same wall thickness all over, thus in the corrugation peaks as well as in the valleys between corrugations, while a ribbed paper, on the other hand, is produced from a fibrous pulp suspension, whereby, on a base layer with a set thickness, ribs such as ribs 2 of a specific height and width are formed or moulded, in which to a great extent the above mentioned cushioning effect and stability of ribbed millboards resides.

Claims (6)

Claims

1. A ribbed millboard or corrugated paper, which has the side opposite to the ribs-or one side-faced by a sheet of paper or relatively thin millboard, characterised in that a coating of adhesive is applied to the backs of the ribs or on the peaks of the corrugations, and the notches are formed at regular intervals in the ribs or peaks of the corrugations.

2. A rubbed millboard according to Claim 1, characterised in that the notches are shallower than the height of the ribs.

3. A ribbed millboard according to Claim 1 or 2, characterised in that the notches are offset on each rib relative to the notches on the two adjacent ribs.

4. A ribbed millboard according to Claim 3 in which the notches are offset by half the distance between two adjacent notches on a rib.

5. A ribbed millboard according to Claim 1, 2 or 3 in which the notches lie parallel to each other transverse to the ribs.

6. A ribbed millboard or corrugated paper substantially as described herein with reference to the accompanying drawings.