Method and arrangement for transporting drinking straws
Drinking straws (1) are enclosed at certain distances from each other and in parallel between two plastic films (2) as a continuous strip (3) of straws. The strip (3) is fed into a transport box (4) without lateral displacements in a straight stack with parallel layers. The internal width of the box (4) corresponds to the width of the strip (3).
The present invention relates to a method and arrangement for packing and transporting drinking straws in a transport box, the straws being carried in plastic film at certain distances from each other and in parallel as a continuous strip of straws.
BACKGROUND OF THE INVENTIONA cardboard box is used to pack the continuous strip of straws, normally directly from the strip producing machine. The box is transported to a plant for filling liquid foods, normally drinks, such as juice, into packages for later consumption by individual consumers.
Downstream of the liquid food packaging machine, a straw applicator device is arranged, where the strip of straws is fed from the opened box. The sealed film portions between the straws are cut to produce individually packed straws, and each filled package is provided with a straw, affixed for example by hot-melt adhesive.
The continuous strip of drinking straws is today fed into a cardboard box with standard dimensions in a manner that from a certain point-of-view may be regarded as virtually random. The dimensions of the box are chosen to suit conventional storage and transport systems and may amount to roughly 600×600×600 mm.
The strip of straws can be fed into the box over a reciprocating arm, so that the strip is distributed over the area of the box. This means that the adjacent layers of the strip in the box are oblique to each other or form angles with each other or in other words that the straws of the different layers are arranged obliquely to each other.
The internal volume of the box is hereby utilized in a very poor way, so that the transport and storage costs will be unnecessary high. Another important drawback is that the straws can be bent or damaged in other ways, because they are not fully supported by underlying straws. The straws, made of a plastic material, are rather thin-walled and are comparatively vulnerable, especially some time after their manufacture.
BACKGROUND OF THE INVENTIONThe mentioned drawbacks are according to the invention obviated in that the strip of straws is fed without lateral displacements in a straight stack with parallel layers into a transport box with an internal width corresponding to the width of the strip.
It is also within the scope of the invention to have more than one such stack in a box. In such a case the internal width of the box corresponds to the combined width of the stacks.
According to an embodiment of the present invention, the opposite ends of the strip of straws are sealed together so as to form a continuous closed-loop strip of interconnected straws.
BRIEF DESCRIPTION OF THE DRAWINGSThe invention will be described in further detail below, reference being made to the accompanying drawings, in which:
Drinking straws are generally denoted 1 in the drawings. They are simply shown as tubes but may for example be of a telescopic type now commonly used. In the manufacturing plant the drinking straws 1 are usually enclosed between two continuous plastic films 2, that are sealed together around the straws to produce a continuous strip 3 of enclosed straws. Four such strips 3 are for example shown in a side view in
Traditionally, the continuous strip 3 of straws is fed into a standard box in a virtually random manner. Such a used standard box suited for conventional transport and storage systems may have the following dimensions: length 600 mm, width 575 mm and height 620 mm. The strip 3 is fed into the-box over a reciprocating arm in order to distribute the strip over the area of the box, which means that a packing pattern as suggested in
This means that the internal volume of the box is very poorly utilized and that much air is transported, leading to unnecessary high transport and storage costs. Further, the virtually random packing of the straws means that the straws can become damaged during transportation and storage, i.e. because they are not fully supported by underlying straws and are susceptible to bending. (The straws are comparatively soft, especially after their manufacture.)
As the packing of the continuous strip 3 of straws in the box 4 is no longer random, the straws 1 in the box are parallel to each other not only in one layer but in all layers throughout the box 4, as is schematically illustrated in
This is illustrated in
It appears in
The result is as is clearly visible in
In a standard box of the size mentioned above 35000 straws may be packed, whereas a box with the dimensions also mentioned above and having one stack of straws can hold 20000 straws. This means that a volume gain of up to 65% may be obtained by the packing according to the invention, which can lead to a total cost reduction of about 5%. Such a cost reduction may be of great importance in a mass production field with fierce competition.
Another important advantage is that the previous problem with deformed or damaged straws in the box is eliminated, even when the box is subjected to tough transportation conditions.
According to the arrangement of
The two ends may be sealed together e.g. after a linear strip 3 is arranged in the box to forms a Stack of layers as described above, but keeping an end portion 11 adjacent to the bottom layer along an end wall 12 of the box; a free end of this portion 11 is then sealed to a free end of the top layer once the stack is completed.
This arrangement eliminates the problem of finding the free end of the strip when opening the box; this can be problematical if a linear (i.e. not closed-loop) strip is used since, during transportation, the end of the strip laid on the top layer may be displaced and fall down between the inner side of the box and the straws contained therein, making it very difficult and time consuming to locate the end of the strip of straws.
According to the arrangement of
The invention is not limited to the shown and described embodiment with a box for only one straight stack. A box may be dimensioned for more than one such stack.
Claims
1. A method of packing and transporting drinking straws in a transport box, the straws being carried by plastic film at certain distances from each other and in parallel as a continuous strip of straws, wherein the strip of straws is fed without lateral displacements in one or more straight stacks with parallel layers into a transport box with an internal width substantially corresponding to the width of the strip or a multiple thereof.
2. A method according to claim 1, wherein the straws in one layer in the stack are positioned in the interspaces between the straws in an adjacent layer.
3. A method as claimed in claim 1, including the step of sealing together opposite ends of said strip so as to form a closed-loop strip of interconnected straws, said transport box having an internal width substantially corresponding to the length of said straws.
4. An arrangement for packing and transporting drinking straws in a transport box, the straws being carried by plastic film at certain distances from each other and in parallel as a continuous strip of straws wherein the transport box has an internal width substantially corresponding to the width of the strip of straws or a multiple thereof, enabling feeding the strip of straws without lateral displacements in one or more straight stacks with parallel layers.
5. An arrangement as claimed in claim 4, wherein opposite ends of said strip are sealed together so as to form a closed-loop strip of interconnected straws, said transport box having an internal width substantially corresponding to the length of said straws.
6. An arrangement as claimed in claim 4, wherein said straws are only partially enclosed between two plastic films having a width which is less than the length of the straws, said films being sealed together at intervals so as to form a plurality of equidistantly spaced sleeves housing said straws and from which opposite end portions of the straws project axially.
Type: Application
Filed: Feb 19, 2001
Publication Date: Mar 16, 2006
Inventors: Chris Kestle (Glen Allen, VA), Hans Hellstrom (Staffanstorp)
Application Number: 10/240,600
International Classification: B65D 85/20 (20060101); B65B 19/34 (20060101);