WO1983002930A1

WO1983002930A1 - Cup with handle

Info

Publication number: WO1983002930A1
Application number: PCT/EP1983/000047
Authority: WO
Inventors: Rissen Gmbh Maschinenfabrik
Original assignee: Schmidt, Werner
Priority date: 1982-02-24
Filing date: 1983-02-24
Publication date: 1983-09-01
Also published as: DE3206528A1; EP0101477A1; JPS59500269A; EP0101477B1; DE3363247D1; JPH0459212B2

Abstract

The scellable coated paper cup comprises an envelope (1) closed with an overlapping seam. The overlapping extends on a large surface and comprises an unfoldable handle (8) from the outer layer of the overlapping. The overlapping joint comprises essentially two seams, the first seam (6) being sealingly provided at the inner edge of the overlapping and the second seam (12), of lower quality, at the outer edge of the overlapping. The manufacturing cost of a high quality seam is required only for the first seam (6).

Description

- / -

description

The invention relates to a cup container made of fiber material such as paper, the jacket of which is closed by an overlap, which has a tight and mechanically strong connection between its inner and outer layers and at least one in its outer layer within the area forming the connection contains fold-out handles that are recessed from the connection.

In a known cup container of this type (US Pat. No. 2,060,781), the entire overlap region takes part in a connection produced by glue application, with the exception of the fold-out handles which are excluded from the glue application. The large-area glue application and the large-area pressing as well as the recess of certain districts from Glue application does not cause any technical difficulties. - This technique cannot be easily transferred to modern cup production using fiber material that is fully sealable and connected to the individual cup parts by sealing the coating material under heat and pressure. On the one hand, the handles cannot be removed from the sealable coating within the overlap area; and on the other hand, when using the usual heat pulse method, there is a risk that either the heat influence cannot be reliably concentrated on the areas outside the handles and thus the handles are also glued, or that if the heat is appropriately limited, this will not be the case for one reliably tight sealing is sufficient. It must also be borne in mind that modern cup-making machines work with high cycle rates, which require high temperature of the sealing tools with a correspondingly short exposure time; this exacerbates the problems described and increases the risk of browning of the sensitive paper material. - Although it is known to circumvent the disadvantages of the thermal pulse method by using the ultrasonic welding method; However, the ultrasonic welding process is not suitable for such large welding surfaces as are present in the overlap around the area of the handle, especially since these are partly at an acute angle to the direction of action of the sonotrod due to the considerable extent of the welding surface over the circumference of the cup would. It would also be too costly to divide the entire connection area into sub-areas to be welded separately, which are dealt with in successive individual steps, because this would require the presence of a plurality of complex ultrasonic welding stations in the machine. The invention is therefore based on the object of creating a cup container of the type mentioned at the outset, which can be produced using fiber material coated with a full surface seal.

The solution according to the invention consists in that, using such fully sealable coated fiber material, the overlap connection comprises a first, tight seam at the edge of the overlap bordering the inside of the jacket and a second seam of lower quality bordering on the outside of the jacket.

The invention is based on the idea that a high-quality connection is required only at one point of the entire overlap, namely where sealing against the medium contained in the container is necessary at the border of the overlap with the container interior, while in the remaining area such an inferior connection of sufficient quality, which only ensures a sufficient mechanical handle strength, is sufficient for the overlap. Based on this basic idea, only a high-quality connection technique, such as ultrasonic welding, needs to be applied to the first seam mentioned, while in the remaining area a simpler, less complex method can be used, for example a heat pulse method with a lower temperature of the welding tools and clearly limiting its impact on the areas outside the handle.

In addition to the seams mentioned on the inner and outer edge of the overlap, further seams can also be provided, preferably on the upper and / or lower overlap edge,

O especially in the area of the central web of the handle. In general, however, such additional seams are not required, which is why the invention preferred the embodiment with only two seams of different quality on the inner and outer edge of the overlap.

In order to reinforce the second seam on the outer overlap and further and also to integrate it optically better, according to the invention it can have an extension enclosed in the mouth roll. This also applies to any further weld in the area of the central web of the handle. The other upper edge areas of the overlap, on the other hand, are expediently shortened so that they remain un-flanged to avoid thickening of the mouth roll and their cut edge is only just covered under the lower edge of the mouth roll.

If it appears necessary to fix the lower edge of the overlap to the cup jacket, this can be done very easily according to the invention by placing the central web of the handle in the bottom at its lower end, possibly also other edge areas of the overlap - Edge pressure on the jacket foot must be included.

The doubling of the material in the area of the overlap stiffens the container jacket in the area in which the greatest forces are exerted on it by the handle. In contrast, the forces acting in the other container circumference are minor and are therefore not decisive for the choice of material thickness. So it happens that thanks to the large area overlap a thinner material can be used than with cups that have such a large area overlap do not have. Therefore, the large area overlap does not necessarily lead to additional material consumption. In order to be able to exert this stiffening effect, the overlap expediently extends over at least about 120 ° of the container opening, preferably over about 150 ° or more. The importance of this stiffening effect becomes clear for the first time when using densely coated paper material. Previously, you had to choose the material so thick that the stability was a matter of course. The thinner material thickness that is now possible not only results in a material saving, but also has the advantage that the containers can be stacked much more closely in the stack of cups provided a certain jacket conicity is required. For the first time, this allows the number of cups required for a beverage vending machine to be accommodated in a vending machine housing of acceptable size. The stiffening achieved by the large-area overlap and the reduction in paper material used thereby enables handle cups to be accommodated in the same number per stack length as handle-less cups.

The invention is explained in more detail below with reference to the drawing, which illustrates an advantageous exemplary embodiment. In it show:

1 and 2 side views of a cup from different angular directions,

Fig. 3 shows a jacket blank of the cup and

^Fi * J ^{4 is} a cross-section through the cup. -i-

1 and 2 consists of paper coated on the inside with polyethylene. It comprises a jacket 1 with a mouth roller 2 and a bottom (not visible in the illustration), the height of which is indicated by the broken line at 3 and whose downwardly flanged edge in the foot region 4 of the cup is pressed with the lower jacket edge. The jacket blank consists of a blank 5 which serves to form the actual container jacket and is closed by the first seam 6, which is designed as a sealing seam, and a blank part which extends over the region and contains the handle, which consists of two handle parts 8, which are connected to a central web 10 via prepared folding lines 9 indicated by dash-dotted lines and can be unfolded from this cut part. The cut part 7 is extended beyond the handle which is furthest away from the cut part 5 in the region 11, which serves to form the second seam 12. The blank 7 with the seam area 6 form the outer layer of the overlap, the extent of which is indicated in FIG. 4 by the angle 18

Both the center bar 10 and the cuts intended to form the seam 12 !! 11 have top-side extensions which are intended to be rolled into the mouth roll 2 for increased strength, while the cut parts located therebetween are made less high so as not to lead to undesired thickening of the mouth roll in the area in which the Jacket through the blanks 7 is doubled.

At the lower end of the blank, the blank 7 is somewhat shorter than the blank 5. This is because the lower edge of the blank 5 around the bottom edge

9

must be folded upwards inside, while this is not necessary for the blank part 7; on the contrary, this would only lead to an undesirable thickening of the material. However, the blank part 7 is made so long at the bottom that it protrudes into the foot region 4 and can therefore be sealed there by means of the compression exerted when the shell-bottom connection is formed. However, this is not absolutely necessary. In some cases it is sufficient if the cutting part 7 is only present in the upper area to the left of the handle and is therefore limited, for example, by the line shown in broken lines in FIG. 3.

In the manufacture of the cup, the jacket blank is first wound in a customary manner and the first jacket seam 6 is closed, for example by the action of an ultrasound stamp. The mandrel carrying the jacket is then rotated by the angular amount between the seams 6 and 12 and the second jacket seam 12 is closed. If desired, additional connection points 14 between the blank part containing the handle and the jacket can also be carried out in an analog manner at the same time or in special working steps. The bottom is then inserted into the jacket, crimped with it and pressed in the foot region 4, the connecting seam 15 being formed at the lower edge of the blank 7. Finally, the jacket is provided with the mouth roll 2.

The blank part 7 containing the handle is then connected on both sides by the seams 6 and 12 to the jacket part. The upper edge strip 16 and the lower one are stretched between these two seams Edge strips 17, with which the central web 10 of the handle is connected, these edge strips possibly also being connected to the jacket by the weld 15 or 14.

The finished cup has the cross-sectional shape appearing in FIG. 4. It can be seen that it is stiffened in the area of the angle 18 by the blank part 7, specifically in the angle area in which the forces are to be transferred from the handle to the cup shell.

1 and 2, the weld seams are indicated by puncturing. The seams 12, 14 and 15 need not be of the same quality as the seam 6 because they do not need to be tight. They can therefore be carried out using simpler means. For example, they can be welded using the heat pulse method, while ultrasonic welding is used for the seam 6.

O

Claims

1. Cup container made of fiber material such as paper, the jacket (1) of which is closed by an overlap, which has a tight and mechanically strong connection between its inner and outer layer and in its outer layer within the area forming the connection, at least one of the connection is removed contains fold-out handles (9), characterized in that the fiber material is coated with a sealable surface and the overlap connection has a first, tight seam (6) on the edge of the overlap bordering the inside of the jacket and a second one on the outside of the jacket of the overlap adjacent seam (12) of lower quality.

2. Cup container according to claim 1, characterized in that the second seam (12) and / or the central web (10) of the handle (9) has an in the mouth roll (2) ein¬ closed extension (13).

3. ^' cup container according to claim 1 or 2, characterized gekenn¬ characterized in that the overlap connection has one or more further seams (14, 15) at the upper and / or lower overlap edge.

4. Cup container according to one of claims 1 to 3, characterized in that the central web (10) of the handle (9) is connected at its lower end in the region of a bottom edge pressure with the casing foot (4).

5. cup container according to one of claims 1 to 4, characterized in that the handle (9) ent-containing blanks (7) extends over at least about 120 o (angle 18).

6. A method for producing a cup container according to one of claims 1 to 5, characterized in that the first seam (6) by the action of ultrasound and the second seam (12) or the further seams (14, 15) are produced in the heat pulse method.