WO2000010900A1

WO2000010900A1 - Transport and storage protector for the edges of cylindrical paper rolls

Info

Publication number: WO2000010900A1
Application number: PCT/SE1999/001436
Authority: WO
Inventors: Magnus Renman; Johan Rabe
Original assignee: Sca Packaging Sweden Ab
Priority date: 1998-08-24
Filing date: 1999-08-24
Publication date: 2000-03-02
Also published as: SE9802814L; SE9802814D0; AU5768399A

Abstract

The invention concerns a transport and storage protector for the edges of cylindrical paper rolls. It is characterised in that the disc-shaped protector has a circular shape and exhibits a central, circular portion (3; 303) which is surrounded by an edge portion wherein the central portion (3; 303) has a greater thickness than the edge portion (4; 304). The edge portion (4; 304), which lies nearest to the end surface of the roll (1) extends all the way out to the edge of the roll (1) and the thicker, central portion (3; 303), which is arranged concentrically with the edge portion (4; 304), extends only part of the way out towards the edge.

Description

TITLE:

Transport and storage protector for the edges of cylindrical paper rolls.

TECHNICAL FIELD The present invention concerns a transport and storage protector for the edges of cylindrical paper rolls which are wrapped in packaging paper which is folded in at the end surfaces.

PRIOR ART The above-mentioned types of paper rolls are often intended to be transported over very long distances and must sometimes be stored for long periods of time in large areas. They must be able to be transported and stored horizontally but also to be stood on their end surface. It is important that the paper in the paper roll is not damaged in any way, especially as such rolls are often to be used directly in printing machines for producing newspapers, etc. They are therefore packed in a stout packaging paper round the mantle part of the roll, which paper extends out over the sides and is folded against the end surfaces.

The edges between the mantle part and the end surfaces on the rolls are naturally extremely vulnerable and can easily be damaged during transportation or storage. In order to protect these edges, which must be intact, a disc of corrugated cardboard has been arranged at the end surfaces, which disc extends out to the edges to protect them. The packaging paper is folded on top of these sheets of corrugated cardboard at the end surfaces.

The packaging of paper rolls is described in the article "Wrapping of Paper Reels" by Packfors and the Nordic Paper Group for Distribution Quality, Stockholm, 1995.

THE TECHNICAL PROBLEM When the above-mentioned types of rolls are stored or transported lying on the mantle surface, the edges are sufficiently protected by the disc of corrugated cardboard. However, if they are raised up so that they are standing on an end surface, the packaging paper which is folded round the protective corrugated cardboard disc will be pressed through the corrugated cardboard disc since the folded packaging paper lies in creases and is not flat. This can lead to marks or damage occurring at the edges of the paper on the end surface which is supporting the roll.

THE SOLUTION

It has therefore long been a desire to be able to protect the edges of the roll in a better way and therefore a transport and storage protector for the edges of cylindrical paper rolls has been achieved in accordance with the present invention, comprising disc-shaped protectors arranged at the end surfaces of the roll, wherein the protector is characterised in that the disc shaped protector has circular shape and comprises a central, circular portion which is surrounded by a ring shaped edge portion, wherein the central portion has a greater thickness then the edge portion.

In accordance with an embodiment of the invention, the disc shaped protector comprises two circular discs which are placed one on top of the other, the disc which lies nearest to the end surface of the roll extending all the way out to the edge of the roll and the second disc, which is arranged concentrically on top of the first disc, extending only part of the way out towards the edge. The two discs are advantageously glued together.

The dimensions of the discs are such that the second, outer disc extends only as far out towards the edge that it is accommodated within the folded packaging paper around the roll.

In accordance with an alternative embodiment of the invention the transport and storage protector comprises a compressible material and the edge portion has been provided with a smaller thickness than the central portion through compression of the compressible material within the edge portion.

A transport and storage protector according to the invention is advantageously partly or completely made from corrugated cardboard. According to one embodiment of the invention, the diameter of the central portion of the transport and storage protector is approximately 2/3 of the total diameter of the disc shaped protector.

DESCRIPTION OF THE FIGURES

The invention will be described in more detail below with reference to the attached drawings, in which

Fig. 1 shows a perspective view of a paper roll with an end protector applied, and in which

Fig. 2 shows, also in a perspective view, the end protector itself when it is not connected to the roll; and in which

Fig. 3 shows an end protector according to a second embodiment of the invention.

DETAILED DESCRIPTION

Fig. 1 shows a cylindrical paper roll 1 which is packed in ordinary durable packaging paper, which paper is folded round at the end surfaces and there forms creases of paper 2. The outer disc 3 of corrugated cardboard is arranged within the creases of paper 2. This disc is concentric with the circumference of the paper roll and is located completely within the paper creases 2 on the packaging paper.

The size of the paper roll 1 can be a couple of metres in length with a diameter of in the region of a metre. Naturally, other sizes can exist. The outer protective disc 3 must be located completely within the creases 2 of the packaging paper and its diameter will therefore suitably be around 2/3 of the diameter of the inner disc.

Fig. 2 shows the protector according to the invention when it is not arranged on a paper roll. The protector comprises the outer disc 3 shown in Fig. 1 and the inner disc 4 which lies against the paper roll 1 and which has a diameter equal to that of the paper roll 1. Thus, the disc 4 lies edge to edge with the paper roll 1. The discs 3 and 4 consist of ordinary corrugated cardboard with a thickness of about one centimetre. It is important that the outer sheet 3 has a thickness which is not less than the thickness of the creases 2 when folded. The discs 3 and 4 can be glued together before they are applied to the paper roll 1 but it is also possible to glue the outer sheet 3 onto the inner sheet 4 after the paper roll 1 has been wrapped in packaging paper.

Although corrugated cardboard is a preferred material for the end protectors in accordance with the invention, it is, of course, possible to use other types of material such as cardboard, cellular plastic material, or the like.

What has been achieved by means of the present invention is that when a paper roll is stood on its end surface the outer sheet 3 will take up the entire weight of the paper roll and no appreciable compression of the creases with subsequent pressing into the disc 4 will take place.

The end protector which is shown in Fig. 3 is formed from a circular disc of compressible material, such as corrugated cardboard. The material in the end protector has been compressed within a ring-shaped edge portion 304 whereby the edge portion has been permanently deformed into a smaller thickness than a central, circular portion 303 which is arranged inside the edge portion. The edge protector in Fig. 3 fills the same function as the edge protector which is shown in Fig. 2.

The invention is not limited to the shown embodiments but can be varied in different ways within the scope of the claims.

Claims

1. Transport and storage protector for the edges of cylindrical paper rolls (1) comprising a disc-shaped protector adapted to be arranged at an end surface of a cylindrical paper roll, c h a r a c t e r i s e d in that the disc shaped protector has circular shape and comprises a central, circular portion (3;303) which is surrounded by a ring shaped edge portion (4;304), wherein the central portion (3;303) has a greater thickness then the edge portion (4;304)

2. Transport and storage protector according to claim 1 , wherein the disc shaped protector comprises two circular discs (3, 4) which are placed one on top of the other, the disc (4) which lies nearest to the end surface of the roll (1) extending all the way out to the edge of the roll (1) and the second disc (3), which is arranged concentrically on top of the first disc (4), extending only part of the way out towards the edge.

3. Transport and storage protector in accordance with claim 2, wherein the two discs (3,4) are glued together.

4. Transport and storage protector in accordance with claim 2 or 3, whrein the second, outer disc (3) extends only as far out towards the edge that it is accommodated within the folded packaging paper (2) around the roll (1).

5. Transport and storage protector according to claim 1, wherein the disc shaped protector comprises a compressible material and the edge portion (304) has been provided with a smaller thickness than the central portion (303) through compression of the compressible material within the edge portion (304).

6. Transport and storage protector according to any one of the preceding claims, wherein the disc shaped protector comprises corrugated cardboard.

7. Transport and storage protector according to any one of the preceding claims, wherein the diameter of the central portion (3;303) is approximately 2/3 of the total diameter of the disc shaped protector.