The invention relates to the mounting of objects, such as for example drinking straws which are packed into pockets, onto containers, such as for example film drinks pouches.
From the state of the art a method is known for applying drinking straws to film pouches, as explained in the following based on
The object of the invention is to suggest further improvements for fast and fault-free mounting, in particular providing methods, devices and objects which enable an improvement to this method and an improvement to the products manufactured by the method.
With the aid of the adhesive tape according to the invention, which incorporates adhesive zones, which are spaced out by non-adhesive zones in the direction along the adhesive tape, it is possible to produce a pocket tape according to the invention with which non-adhesive zones are formed in the sections between the centers of two adjacent pockets. With a pocket tape of this type according to the invention, it is possible to carry out a method according to the invention, with which pockets are stuck to containers and during which a knife, which cuts off pockets from the pocket tape, does not come into contact with the adhesive. Consequently, clogging of the knife with adhesive, which would impair the service life of the blade, is prevented.
For the invention it is advantageous if an adhesive with high initial adhesive force is used. The adhesive tape according to the invention, the pocket tape according to the invention and the container according to the invention all have the advantage that the process can be implemented with a soft adhesive which can exhibit this sort of high initial adhesive force. Due to the fact that a cover of the adhesive (e.g. a pocket or a carrier tape) with the container according to the invention and also with the embodiments of the pocket tape and adhesive tape according to the invention protrudes over the original adhesive zone, a certain flow of the adhesive can be accepted without the adhesive escaping to the outside.
With the adhesive tape according to the invention it is possible to apply single adhesive locations to any objects. This occurs due to the fact that the adhesive of one adhesive zone is applied to the object together with the carrier tape. Due to the covering carrier tape, it is possible to apply pressure. Then, the carrier tape can be easily removed. This takes place due to the fact that the carrier tape, from which the adhesive has already been transferred to an object, can be pulled off, releasing the carrier tape from the last stuck adhesive zone. Also when the carrier tape has been parted, it is easily possible to grip the carrier tape and pull it off, because there are sections at which the carrier tape does not adhere to the object. The tedious search for a corner on which the carrier tape can be gripped and pulled off, which is familiar with commercially available double-sided adhesive tapes, is not needed. After removal of the carrier tape, the adhesive remains on the object. The adhesive tape according to the invention can therefore be realised as double-sided adhesive tape or also as transfer adhesive tape.
Particularly advantageous embodiments of the devices, methods and objects are explained based on the enclosed figures. Here,
In
Each of the pockets 2 contains one or more drinking straws 11. Instead of drinking straws, pieces of cutlery, for example made of plastic, stirring tools, accessory parts or small gifts could be contained in the pockets, whereby, also here, one or more of these sorts of objects can be accommodated in a pocket. For the foodstuffs field the pockets 2 have the advantage that an hygienically clean packaging of the straws 11 or other objects is possible in the pockets 2.
The pockets 2 arise due to the fact that in
Adhesive zones 12 are provided along the pocket tape 1. The adhesive zones 12 are located in the longitudinal direction of the pocket tape 1, mainly in the centre of each pocket 2. As illustrated in
It is also possible according to the invention that, as shown in the center of
As shown in
The adhesive zones 12 are repeated, mainly periodically, along the pocket tape 1. Also, the formation of the pockets 2 and the sections 13 in the pocket tape 1 is repeated periodically. Ideally, the periodicity of the adhesive zones 12 and the periodicity of the pockets 2 are the same.
The material enveloping the drinking straws 11 may be of any suitable plastic or also paper, textile, foil or film material.
The adhesive which is applied in the adhesive zones 12 can be any suitable adhesive. Adhesives with a high initial adhesive force are advantageous. Adhesives can even be applied which exhibit a certain flow property, so that a good adhesive force is produced. Such adhesives are also termed soft adhesives. An example of an applicable sort of adhesive is “hot-melt” adhesive.
The sections 13 in
For cutting the pocket tape 1 up into individual pockets 2, it is advantageous if the sections 13 are large, because then a larger area arises in which the cutting process for parting a pocket 2 from the pocket tape 1 can take place.
In
In
On the upper and lower edges of the carrier tape 4 non-adhesive areas 16 are provided which extend along the carrier tape 4. Consequently, the carrier tape 4 protrudes in all directions over the areas of the adhesive zone 12, whereby the adhesive can flow a little without it escaping to the outside.
As illustrated in
Based on
The pockets 2 present to the left of the knife 5 are then all singled out and can be held on the deviation roller 9 by appropriate devices, such as for example, a vacuum opening or other clamping devices.
Due to the fact that the knife 5 separates a pocket 2 from the pocket tape 1 at a location at which no adhesive of an adhesive zone 12 is present, the knife 5 does not make contact with the adhesive of the adhesive zones 12. Consequently, clogging of the knife by adhesive can be largely eliminated. This type of clogging can disadvantageously shorten the service life of the knife 5 or lead to operational faults. With the method according to the invention, using a pocket tape 1 according to the invention with an adhesive tape 14 according to the invention, the service life of the knife, i.e. the time during which a knife cuts without problems, can be significantly increased.
Once the pockets 2 have been singled out, the pockets 2 are pressed against drinks pouches 3 with a pressure device 7, as illustrated in
A further embodiment of a method according to the invention for sticking a pocket 2 to a container 3 consists of applying the adhesive 20 with a head, as illustrated for example in
The adhesive is advantageously immediately applied to the roller 31 in adhesive zones 12 spaced out by non-adhesive zones 15 and these zones are transferred to the pocket tape 2. The adhesive zones 12 are here positioned on the pockets 2 on the pocket tape 1 such that the pockets 2 can be cut off from the pocket tape 1 in the section 13 in the section of the non-adhesive zones 15. With this method a circulating carrier tape 4 can, so to say, be replaced by a roller, whereby the reliability can be improved.
A device for realising the method is illustrated in
The container according to the invention is shown enlarged in
To the right and left of the drinking straw 22 parts 13′ and 13″ of zones 13 on the pocket tape 1 can be seen. Parts 13′ and 13″ have arisen through the cutting off of pockets 2 from the pocket tape 1.
Due to the fact that the non-adhesive sections 15, as shown in
Due to the fact that the pocket 2 protrudes beyond the adhesive zone 12 in each of the directions 22 and 23, a soft adhesive can also be used which can also flow slightly without the adhesive escaping from between the pocket 2 and the film pouch. Consequently, an adhesive can be used with which a substantially higher tack value, i.e. a higher initial adhesive force is achieved.
A device according to the invention for the production of an adhesive tape 14 according to the invention is illustrated in
Through rollers or other deviation devices advantages can be obtained in that the carrier tape 4 has contact with the head 17. The contact may be very slight.
Also it is possible according to the invention that the carrier tape 4 is separated from the head 17 and the adhesive is applied, e.g. sprayed on, over a certain distance.
A method according to the invention for the production of the adhesive tape 14 according to the invention is explained based on
While the carrier tape 4 runs past the head 17, adhesive 20 is intermittently output by the head 17 and applied to the carrier tape 4. This produces adhesive zones 12 and non-adhesive zones 15.
After applying the adhesive 20 in the adhesive zones 12 on the carrier tape 4, the adhesive tape 14 so produced then runs to the right out of
If the adhesive tape 14 according to the invention, which is produced according to the invention, is used immediately, then it is sufficient if the carrier tape 4 has poor adhesion properties on only one side.
The required poor adhesion can for example be obtained by a coated carrier tape material. Especially advantageous are siliconised carrier tapes 4. Also Teflon or other anti-adhesion coatings can be used, e.g. anti-adhesion paints. Also, carrier tapes can be used which consist completely of a low-adhesion material.
During the production of the adhesive tape 14 according to the invention it is possible to apply adhesive to adhesive zones 12 with a number of heads or with a number of adhesive application elements in parallel adjacent to one another on a carrier tape material running off a master roll. Thereafter, the carrier tape material is cut up into single carrier tapes 4. It is also possible according to the invention to make individual carrier tapes 4 from a master roll and to then provide them with the adhesive 20 in the adhesive zones 12.
A device according to the invention for producing a pocket tape 1 according to the invention is illustrated in
With the device schematically illustrated in
According to the invention it is however possible to synchronise the application of the adhesive 20 by the head 17 to a timed cycle whereby the cycle can be made dependent on the speed of the carrier tape 4 or of the pocket tape 1.
The amount of adhesive 20 applied per adhesive zone 12 is advantageously preset.
Instead of using two deviation rollers 18 and 19 to join the carrier tape 4 and the pocket tape 1, it is also possible to use only one roller for the deviation of either the carrier tape 4 or the pocket tape 1 or even to use no roller and the feeding together of the pocket tape 1 and the carrier tape 4 is then achieved in that a constriction point is provided through which the two tapes 1 and 4 are pulled.
A further embodiment of the device according to the invention for the production of a pocket tape 1 according to the invention arises due to the fact that the head 17 does not apply the adhesive to the carrier tape 4, but is instead arranged such that the adhesive 20 is applied to the pocket tape 1. The covering of the adhesive zones 12 with the carrier tape 4 occurs however analogous to the device described above. Also here, the adhesive application by the head 17 can be triggered by the passage of single pockets or pocket contents or it can also be synchronised to a timed cycle whereby the cycle depends on the speed of the carrier tape or the pocket tape 1.
Furthermore, a grooved wheel 25 is provided whereby the drinking straws 11 of the pocket tape 1 can be accommodated in the grooves. Consequently, a feed of drinking straws is possible in which the distance between adjacent drinking straws and/or the rate or cycle with which the drinking straws 11 or the pockets 2 are fed can be adjusted. Also, it is alternatively or additionally possible that the grooved wheel 25 functions as a pulse transducer, whereby a passing drinking straw 11 triggers a pulse.
A checking device 30 for checking the carrier tape is provided downstream from the head 17. The checking device 30 can, for example, be provided to just check for the presence and/or the lateral position of the carrier tape 4 or the adhesive tape 14. Also it can check the properties of the adhesive tape 14, such as for example the size and/or quality or the presence of adhesive zones 12 on the carrier tape 4. The checking device 30 can advantageously also be connected to the control device 21 and when faults are found and depending on the fault it can initiate suitable measures, such as switching off, warning, adjusting rollers on a clamping device or make adjustments to other rollers or the head 17 or similar.
Furthermore, a control device 21 is provided which is connected to one or more pulse transducers and the head 17. The control device 21 can control the head such that it applies adhesive 20 targeted on the carrier tape 4. Devices 29 for guiding the pocket tape 1 are provided at suitable positions.
A pulse transducer 24 is provided at the roller 18 and formed such that it detects passing drinking straws. To detect a drinking straw the pulse transducer 24 may for example be equipped optically, mechanically, electronically or in some other way. It is connected to the controller 21 and can pass on these control pulses.
An inspection camera 26 which is connected to the control device 21 is provided to take pictures of the finished pocket tape 1. From the pictures various parameters can be determined in the control device 21 using suitable image processing and image evaluation software. These include advantageously the size of the non-adhesive zone 15, the size of the adhesive zone 12, the correct position of the adhesive zone 12 in relation to the drinking straw 11 and a correct distance between the adhesive zones 12.
The inspection camera 26 can be used for monitoring and control purposes. For example, using the inspection camera 26, it is possible to check the relative position of the adhesive zone 12 in relation to a pocket 2 on the pocket tape 1 during the operation and then to possibly readjust the adhesive application by the head 17 with respect to time, i.e. to delay or speed up in comparison to the previous rate.
With the device in
In the following methods according to the invention for producing a pocket tape 1 according to the invention are explained. With both methods a carrier tape 4 and a pocket tape 1 are fed in. The pocket tape 1 can, for example, be pulled from a storage container or be wound from a roller. The carrier tape 4 can similarly, for example, be wound off a reel. With both methods the carrier tape 4 and the pocket tape 1 are also brought into contact with one another by appropriate devices 18 and 19. A signal transducer 23, 24, 25 signals the passing of a certain part of the pocket tape 1 to the controller 21. The control device 21 then controls the head 17 such that it transfers adhesive 20 to the adhesive zones 12. With a method according to the invention the adhesive can be output onto the carrier tape 4 and with another method according to the invention the adhesive can be output to the pocket tape 1. If the adhesive is applied to the pocket tape 1, then it is applied through the control device 21 such that it is applied in the direction longitudinal to the pocket tape 1 mainly in the centre of each pocket 2. The adhesive-free zones 15 lie mainly in the section which is labelled with 13 in
If the adhesive is applied by the head 17 onto the carrier tape 4, then the adhesive application takes place in the adhesive zones 12 so that when the carrier tape 4 and the pocket tape 1 are brought together, the adhesive zones 12 mainly lie in the longitudinal direction of the pocket tape 1 centrally with reference to the relevant pocket 2. The non-adhesive zones 15 are mainly positioned in the sections 13 of the pocket tape 1. The control of the head 17 for the application of the adhesive 20 in the adhesive zones 12 can also occur through the setting of a timed cycle, whereby the cycle depends on the speed of the carrier tape 4 or the pocket tape 1.
The pocket tape 1 according to the invention so produced can then be inspected by an inspection camera 26 as described above.
The pocket tape 1 according to the invention so produced can then be rolled up or placed loosely in a package. It is also possible that the pocket tape 1 so produced is used immediately with a device as illustrated in
Number | Date | Country | Kind |
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02007421.7 | Mar 2002 | EP | regional |
This application is a Divisional Patent Application of pending U.S. patent application Ser. No. 10/394,526, filed Mar. 21, 2003, and entitled “PROCEDURE AND DEVICE FOR STICKING OBJECTS”, which claims foreign priority benefit under European Patent Office Application No. 02007421.7, filed on Mar. 28, 2002, and entitled “PROCEDURE AND DEVICE FOR STICKING OBJECTS”, the contents of both being incorporated in entirety by reference herein.
Number | Date | Country | |
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Parent | 10394526 | Mar 2003 | US |
Child | 11499137 | Aug 2006 | US |