GB1578260A

GB1578260A - Container

Info

Publication number: GB1578260A
Application number: GB2001077A
Authority: GB
Original assignee: Unilever PLC
Current assignee: Unilever PLC
Priority date: 1976-05-14
Filing date: 1977-05-12
Publication date: 1980-11-05
Also published as: LU77336A1; FR2351013B1; BE854636A; ATA344077A; FR2351013A1; CH614166A5; AT364770B

Abstract

A cylindrical container comprises a casing (1) and closure parts (3, 7) present at each end. The casing (1) comprises an essentially rectangular cardboard strip bent to form a sleeve. The casing has an overlapping longitudinal seam (2) parallel to the container axis. At least one edge strip (21) lying at the opening of the casing is bent over inwards and is used for holding a closure part (3, 4). The edge strip (21) has a cutout (6) starting from the casing edge, so that, in this region, there is no overlapping seam and the longitudinal seam is not doubled in this part when the edge strips are bent over, but rather the two edges of the casing abut here in a flush manner. One closure part can be cardboard lid (3, 4) with an edge (4) which projects at right angles from the plane of the lid, lies between the casing (1) and the edge strip (21) bent over inwards and is fastened, for example, by adhesive bonding. The other closure part can be a plastic lid (7, 8, 9) which is removably inserted at the other opening of the case. The container can be manufactured, filled and closed in a particularly simple and rapid manner and can be used, for example, as a transport sleeve for drawings. <IMAGE>

Description

(54) CONTAINER (71) We, UNILEVER LIMITED,a company organised under the laws of Great Britain, of Unilever House, Blackfriars, London E/C 4, England, do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to a container having an approximately constant crosssection over its entire height and consisting of a body which has been wound from cardboard as well as closing parts at both ends of said body. Preferably the closing parts forming the bottom and the lid are at least approximately circular.

Containers of this type are, for example, known as packaging and transport sleeves for drawings. Normally, however, they are wound spirally and they are mostly closed with hooded lids.

It is an object of the invention to provide a similar sleeve-shaped container which can be manufactured, filled and closed in a simple and rapid way and requires a minimum of material.

According to the present invention there is provided a container having an approximately constant cross-section over its entire height formed from a body wound from cardboard and closing parts arranged at both ends, in which the body is formed from a rectangular blank and possesses an overlapping longitudinal seam parallel to the container axis and at least at one end of the body a peripheral edge strip which is bent or beaded inwards to retain the closing part at that end, one of the overlapping edges of the body at the longitudinal seam being having a cut-out in said edge strip so that the edge strip is of a single thickness of cardboard.

This particularly simply formed sleeve can be provided with various types of closing parts, which are retained inside the ends of the sleeve by means of the bent-in edge strips, it being particularly possible to form seams which are impervious to water vapour.

In a preferred embodiment the closing part is a cardboard cap with an approximately rectangularly bent edge. This cap has been inserted into the sleeve with its edge directed outwards, and the edge strip of the container is beaded over until it butts against the edge of the cap; moreover the edge of the cap is sealed to the sleeve by gluing or a similar method.

The edge of the cap can be connected firmly and tightly with the inside of the cylindrical body surface as well as with the bent-over edge strip.

The edge of the cap is thus retained on both sides, and since the beaded edge strip has been cut out over the width of the seam, it is possible to obtain a tighter and attractive sealing.

According to another preferred embodiment at least one of the closing parts, for example the lid, is plastic material, the lid having a diameter corresponding to the inner diameter of the sleeve and having an approximately annular extension or rim, which projects from the sleeve and approximately corresponds to the outer diameter of the container. Preferably the lid is elastically fixed in the sleeve by means of and inside the inwardly beaded edge strip. The lid may have been deep-drawn from plastic material. At its inner end it may have small radial protrusions snapping under the edge of the beaded edge strip.

In order to enable the container to be made impervious to water vapour, also with closing parts of plastic material, in a further embodiment the end of the sleeve is surrounded by an adhesive tape, which on the one hand covers the outer edge at the end of the sleeve and on the other hand the projecting rim of the plastic lid, the adhesive tape and the contact surfaces having such a width that a good and tight connection is obtained.

The cut-out in the edge strip, corresponding to the width of the longitudinal seam, avoids the formation of a double layer of cardboard in the beaded-in strip on this spot. This allows the beaded edge strip retaining the closing part to be brought exactly in the form of a circle.

The provision of a cutout is effective, both for the beading of the edge strip and for retaining the closing part. For containers having very small diameters, for example 2 cm, the cutout is even indispensable for obtaining a uniformly bent edge strip, if the strip is to butt against the plastic lid over its entire circumference. At the ends of the sleeve which are to be closed with plastic lids the cut-out is preferably provided at the edge of the rectangular body blank that lies inside in the longitudinal seam.

According to the invention, a very strong container can be made in a very simple way using a minimum of material. The seams, particularly the joints between the sleeve and the closing parts, can if desired also be made substantially vapour-tight, so as to prevent the contents from drying in. The material used for the sleeve and the cap may be a plasticcoated, sealable cardboard.

In a further embodiment of the invention an extension is provided on the outside of the body, extending from its longitudinal seam and not connected to the opposite sleeve section, and in the area of this extension an axial perforation or a score line which does not reduce vapour-tight-ness is provided on the sleeve body. This allows opening of the container by simple tearing open of the sleeve by means of the free extension, serving as a grip.

For certain uses it may be advantageous also to provide a perforation or score line in the area of the lid and/or the bottom. This makes it possible to completely open the container on tearing and to return the body blank to an approximately flat position.

For this purpose it may be useful if the perforation or scoring in the lid and/or the bottom extends along the outer periphery of the flat surface.

A suitable apparatus for manufacturing a container according to the invention is characterized in that for the purpose ofjoining the body to the bottom and/or lid, a device is provided for beading-in the edge strip of the body, comprising within its area a device for applying lubricant to the edge strip.

Particularly in the case of coated cardboard and also for very small diameters of the wound sleeve this arrangement ensures that the edge strip can be beaded in until it abuts against the edge of the cap without its surface being damaged.

Examples of the object of the invention are shown in the accompanying drawings, in which Figure 1 diagrammatically shows an already finished body with a bottom from cardboard and a lid from plastic material; Figure 2 shows the closed container according to Figure 1; Figure 3 shows a container with a different plastic lid; Figures 4 and 5 show a container with bottom and lid from cardboard; Figure 6 is a diagrammatic drawing of a beading device; Figures 7, 8 and 9 show examples of various cross-sectional shaped of the sleeve; In Figure 1 reference numeral 1 indicates the body of container, formed from a flat rectangular cardboard blank and provided with a longitudinal seam 2. For the purpose of closing the lower opening of said body a capshaped bottom 3 is provided, also made from cardboard, the edge 4 of which has been bent down.The bottom is inserted from below into the body to such an extent that the lower end of the edge 4 comes to lie at the line 5 indicated on the body. Subsequently the lower edge strip 21 of the body below said line 5 is beaded inwards up to the edge 4 of the bottom plate, after which the body and the bottom plate are joined by gluing. In order to enable a close fitting of the beaded edge strip against the inside of the body, in the zone of the longitudinal seam 2 the body is provided with a cut-out 6, the dimensions of which correspond to the width of the seam and the width of the beaded edge strip. The gluing is then effected between the body and the outer and/ or inner surface of the bottom edge. The container shown may for example have a diameter of from 5 to 6 cm and a height or length of from 15 to 20 cm.

It is also possible, during the manufacture of the longitudinal seam 2 as well as during the joining of the bottom, to effect a sealing. For this purpose the surfaces to be sealed together are coated with a sealable thermoplastic material.

For the purpose of closing the upper opening of the sleeve formed from the body blank, a deep-drawn or injection-moulded plastic lid is provided. This lid 7 has a section 8, which is inserted into the sleeve body and the outer diameter of which corresponds to the inner diameter of the body.

Immediately adjacent to this, the lid 7 has a rim in the form of a further section 9, the outer diameter of which approximately corresponds to the outer diameter of the sleeve and lies against its end side. The use of a plastic lid which is suitable to be reclosed several times is particularly advantageous for very thin containers, from which each time only part of the contents is removed.

Figure 2 shows how the seam between said section 9 of the lid 7 and the body 1 is covered by an adhesive tape 10, the ends of which overlap and which seals the gap between the end of the sleeve and the lid section 9.

Figure 4 and 5 show a container having a body 11, provided with an extention piece 12 which is connected to the longitudinal seam 2 and has not been glued to the opposite body section. On both ends of the container a capshaped bottom 3 with outwardly bent edges 4 is provided. Inserting and joining with the body are effected as described in connection with Figures 1 and 2. At both ends of the blank, in the zone of the longitudinal seam 2, cut-outs 6 are arranged. Immediately adjacent and parallel to the longitudinal seam a score line 13 or a similar weakening line is provided, along which the body can be torn open with the aid of the extension piece 12.

Also the two bottom 3 can be provided with such a score line 14, extending along the outer circumference of the flat section of the bottom (Figure 4).

However - as shown in Figure 5 - it is also possible to provide a score line 15 which extends transversely over the bottom. This score line 15 however is then suitably arranged as an extension of the score line 13 in the body.

Containers having a tear-open body are suitably used for those articles which are at once removed the container but cannot be shaken out or poured out.

Figure 3 shows a narrow, high container, formed from a body 100 with a longitudinal seam 2. At both ends cut-outs 60 are provided in the edge strip 21 of the body, which cutouts 60 are arranged at the end of the body blank that lies inside the seam area and are so dimensioned that an overlap of the beaded edge strip is avoided but the end edges of the edge strip 21 in beaded position butt obtusely against each other. The lid 70 is tightly fixed on the sleeve with its lower part pressed into said sleeve, the diameter of said lower part approximately corresponding to the inner diameter of the beaded upper edge strip, while its upper rim is about equal to the outer diameter of the container.

The bottom 30 closing the lower side of the container is pushed in as far as the line 5 indicated in the drawing and is retained by the bent-in lower edge strip 21. The bottom 30 may posses beaded bottom edges. In cases where a tight sealing is not important, also a simple bottom disc can suffice. In particular during rolling in or beading in of edge strips into containers having very small diameters, for example 2 cm, or for containers with rounded comers of about the same radius of curvature, the addition of a lubricant to the cardboard immediately before deformation offers certain advantages.

Figure 6 shows a beading apparatus comprising several rollers 16, 17 and 18, which bead the edge strip 21 of the body 1, 11 or 100 inwards. In the zone of these rollers 16, 17 and 18 a dispensing device 19 is provided for dispensing lubricant, which is applied to the edge strip. This dispensing device may be provided before the beading apparatus or, as shown, between the individual parts thereof.

Figures 7, 8 and 9 show three possible cross-sectional shapes of the sleeve. In addition it is possible to provide any desired crosssectional shape which can be manufactured by winding of a substantially rectangular blank.

The invention is advantageously used for small cylindrical containers with a capacity of less than 500 cubic cm and a height or length which considerably exceeds their diameter.

WHAT WE CLAIM IS: 1. Container having an approximately constant cross-section over its entire height, formed from a body wound from cardboard and clsoing parts arranged at both ends, in which the body is formed from a rectangular blank and possesses an overlapping longitudinal seam parallel to the container axis and at least at one end of the body a peripheral edge strip which is bent or beaded inwards to retain the closing part at that end, one of the overlapping edges of the body at the longitudinal seam being having a cut-out in said edge strip so that the edge strip is of a single thickness of cardboard.

2. Container according to Claim 1, in which said closing part is a cap from cardboard with an approximately rectangularly bent edge and said edge strip of the body has been beaded until it butts against the bent-in edge of the cap and said edge is connected with the body by gluing or in a similar way.

3. Container according to Claim 2, in which the edge of the cap has been glued or connected in a similar way with the cylindrically wound body as well as with the beaded edge strip thereof.

4. Container according to Claim 1,2 or 3, in which at least one of the closing parts is a lid of plastic material and possessing a rim projecting from the wound body and having a diameter which approximately corresponds to the outer diameter of the wound body.

5. Container according to claim 4, in which the lid of plastic material is retained by means of the inwardly beaded edge strip.

6. Container according to claim 4 or 5, in which an adhesive tape is provided, extending around the sleeve, said tape covering on the one hand the outer edge of the wound body and on the other hand the projecting rim of the lid, its covering surfaces having such a width as to ensure a vapour-tight sealing.

7. Container according to claim 4, 5 or 6, in which the cut-out of the edge strip is provided on the edge of the blank lying inside in the longitudinal seam.

8. Container according to any one of claims 1 to 7, in which extending from the outer side of the body in the longitudinal seam an extension piece is provided which is not connected to the opposite side of the body, and in the zone of this extension an axial score line or a similar weakening line is arranged in the body.

9. Container according to claim 8, in which a score line is also provided in the area of the

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. and has not been glued to the opposite body section. On both ends of the container a capshaped bottom 3 with outwardly bent edges 4 is provided. Inserting and joining with the body are effected as described in connection with Figures 1 and 2. At both ends of the blank, in the zone of the longitudinal seam 2, cut-outs 6 are arranged. Immediately adjacent and parallel to the longitudinal seam a score line 13 or a similar weakening line is provided, along which the body can be torn open with the aid of the extension piece 12. Also the two bottom 3 can be provided with such a score line 14, extending along the outer circumference of the flat section of the bottom (Figure 4). However - as shown in Figure 5 - it is also possible to provide a score line 15 which extends transversely over the bottom. This score line 15 however is then suitably arranged as an extension of the score line 13 in the body. Containers having a tear-open body are suitably used for those articles which are at once removed the container but cannot be shaken out or poured out. Figure 3 shows a narrow, high container, formed from a body 100 with a longitudinal seam 2. At both ends cut-outs 60 are provided in the edge strip 21 of the body, which cutouts 60 are arranged at the end of the body blank that lies inside the seam area and are so dimensioned that an overlap of the beaded edge strip is avoided but the end edges of the edge strip 21 in beaded position butt obtusely against each other. The lid 70 is tightly fixed on the sleeve with its lower part pressed into said sleeve, the diameter of said lower part approximately corresponding to the inner diameter of the beaded upper edge strip, while its upper rim is about equal to the outer diameter of the container. The bottom 30 closing the lower side of the container is pushed in as far as the line 5 indicated in the drawing and is retained by the bent-in lower edge strip 21. The bottom 30 may posses beaded bottom edges. In cases where a tight sealing is not important, also a simple bottom disc can suffice. In particular during rolling in or beading in of edge strips into containers having very small diameters, for example 2 cm, or for containers with rounded comers of about the same radius of curvature, the addition of a lubricant to the cardboard immediately before deformation offers certain advantages. Figure 6 shows a beading apparatus comprising several rollers 16, 17 and 18, which bead the edge strip 21 of the body 1, 11 or 100 inwards. In the zone of these rollers 16, 17 and 18 a dispensing device 19 is provided for dispensing lubricant, which is applied to the edge strip. This dispensing device may be provided before the beading apparatus or, as shown, between the individual parts thereof. Figures 7, 8 and 9 show three possible cross-sectional shapes of the sleeve. In addition it is possible to provide any desired crosssectional shape which can be manufactured by winding of a substantially rectangular blank. The invention is advantageously used for small cylindrical containers with a capacity of less than 500 cubic cm and a height or length which considerably exceeds their diameter. WHAT WE CLAIM IS:

1. Container having an approximately constant cross-section over its entire height, formed from a body wound from cardboard and clsoing parts arranged at both ends, in which the body is formed from a rectangular blank and possesses an overlapping longitudinal seam parallel to the container axis and at least at one end of the body a peripheral edge strip which is bent or beaded inwards to retain the closing part at that end, one of the overlapping edges of the body at the longitudinal seam being having a cut-out in said edge strip so that the edge strip is of a single thickness of cardboard.

closing parts.

10. Container according to claim 9, in which the score line in the closing parts extends along the outer circumference of their flat surface.

11. A container substantially as hereinbefore described with reference to Figures 1 and 2, or Figure 3 or Figures 4 and 5.

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