EP2665656B1 - System, method and envelope - Google Patents
System, method and envelope Download PDFInfo
- Publication number
- EP2665656B1 EP2665656B1 EP12737031.0A EP12737031A EP2665656B1 EP 2665656 B1 EP2665656 B1 EP 2665656B1 EP 12737031 A EP12737031 A EP 12737031A EP 2665656 B1 EP2665656 B1 EP 2665656B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seals
- pile
- wrapping material
- envelope
- wrapped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 238000000034 method Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims description 51
- 238000004806 packaging method and process Methods 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 239000005022 packaging material Substances 0.000 claims description 10
- 239000012943 hotmelt Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 239000000123 paper Substances 0.000 description 25
- 238000007789 sealing Methods 0.000 description 17
- 230000001419 dependent effect Effects 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000011087 paperboard Substances 0.000 description 3
- 239000012792 core layer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical class [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008162 cooking oil Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0066—Heating materials to facilitate their unpacking
Definitions
- the feeding apparatus (which will not be described in detail herein) comprises a pick and place arrangement 30, a conveyor arrangement 32 and a control unit (not shown).
- the pick and place arrangement 30 comprises a gripping means 34 arranged to pick a wrapped pile form the pallet 28 (step S1) by grabbing it from opposite sides.
- the gripping means 34 comprises arms 36, the distance between which is adjustable, as is illustrated by the double arrow A.
- the pick and place arrangement 30 moves the wrapped pile to place it onto the conveyor arrangement 32 before releasing it (step S1).
- the wrapped pile is conveyed to the unwrapping apparatus 24 (step S2), which is illustrated in more detail (but still schematically) in figures 4-8 .
- the opening device 42 comprises an elongate rail 46 provided with two suction means 48 arranged to engage with the wrapping paper enclosing the pile and pull it in a direction from the pile to unfold the envelope.
- the opening device is movable between a first position, more particularly a front, lower position, which is shown in figure 6 , and a second position, more particularly a rear, upper position, which is shown in figures 3 , 4 and 5 .
- the suction means 48 are active for connecting to the wrapping paper and enable unfolding of the envelope.
- the opening device is further movable between the second position and a back third position, which is illustrated with dashed lines in figure 5 .
- the loading apparatus 26 of the system 20 is arranged to move the exposed pile 10 of blanks 12 from the table 38 of the unwrapping apparatus 24 to a magazine 54 of a packaging machine (not further illustrated) (step S11).
- the loading apparatus 26 (which will not be described in detail herein) comprises a control unit (not shown) and a pick and place arrangement 56, similar to the pick and place arrangement 30 of the feeding apparatus 22.
- the pick and place arrangement 56 comprises a gripping means 58 arranged to pick the pile 10 from the table 38.
- the gripping means 58 comprises arms 60, the distance between which is adjustable, as is illustrated by the double arrow B.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Description
- The present invention relates to a system and a method for automatic handling of a pile of sheets of packaging material. It also relates to an envelope arranged to be automatically handled by a system according to the present invention.
- Within the food industry, it is usual practice to pack drinks and other products in paper- or paperboard-based packages. Packages intended for liquid foods are often manufactured from a packaging laminate comprising a relatively strong core layer of paper or paperboard and an outer, liquid-tight layer of thermoplastic material on at least that side of the core layer which is to form the inside of the packages. For particularly oxygen-gas sensitive foods, such as juice and cooking oil, the packaging laminate also normally includes a layer of a gas barrier material. This layer is often in the form of an aluminum foil which, moreover, makes for induction sealing of the packaging laminate.
EP 0 443 502 A discloses a system for unwrapping articles, the system having a heating roller to heat seals so as to enable opening without breaking the wrapping material. There are many different ways of manufacturing packages. As an example, packages of gable-top type can be manufactured from flat-folded blanks of packaging laminate which are raised, filled and sealed in a packaging machine. Awaiting these operations, the blanks are stored in a magazine comprised in the packaging machine. During normal operation of the packaging machine, the magazine must be replenished with new blanks at predetermined intervals. - The blanks are delivered to the packaging machine arranged in piles containing a predetermined number of packaging blanks. To protect the blanks from contamination and damage, the piles of blanks are wrapped in brown paper. These wrapped piles or parcels are arranged on pallets that are positioned in the vicinity of the packaging machine for loading of the blanks into the magazine.
- In connection with blanks replenishment, an operator of the packaging machine picks a parcel from the pallet and places it on a table before opening it. Thereafter, the operator places the pile of blanks in the magazine of the packaging machine and discards the brown paper. Today's packaging machines have a capacity of several thousands of packages per hour. Thus, during one single eight-hour working day, at normal operation of the packaging machine, the machine operator will have to lift and in other ways move a total of several tons of blanks.
- Machines for performing the above operations are available but regarded as expensive, bulky and unreliable, the latter being associated with extra work for the machine operator. These machines are often based on the principle of compressing the pile of blanks so as to achieve some "slack" in the brown paper. Thereafter, the paper is separated from the blanks, for example by means of a suction cup, before the paper is cut with a knife to open the parcel. In connection with such machines, there is a risk of the knife damaging the blanks during the parcel opening. Further, such machines require regular maintenance containing, for example, sharpening of the knives since the knife loses its sharpness in the course of time. Naturally, such maintenance is associated with machine down time. Furthermore dust in generated during cutting of the paper. The dust which is accumulated inside a machine has to be removed at regular intervals. Naturally, cleaning dust from of the machine is also associated with machine down time.
- An object of the present invention is to achieve a system, according to
claim 1, and a corresponding method, according to claim 6, for automatic handling of a pile of sheets of packaging material that, at least partly, eliminates the shortcomings of prior art solutions. Additionally, an object of the present invention is to achieve an envelope, according toclaim 12, for enclosing a pile of sheets of packaging material, being arranged to be automatically handled by a system, and in accordance with a method, of the present invention. The dependent claims define further embodiments. The basic concept of the present invention is to provide an automated solution based on unwrapping or unfolding of the wrapping around the piles of blanks. Thereby, the operator is relieved of a number of ergonomically and time demanding operations and can instead perform other tasks. Furthermore, cutting of the envelope is not used for opening the parcels, and thereby the risk of damaging the blanks in connection with parcel opening is reduced and essentially eliminated. Also, the formation of dust is reduced which is advantageous from a hygiene point of view. Additionally, some maintenance operations necessary for cutting equipment, such as sharpening of knives, do not have to be performed in connection with the present invention. - The system, the method and the envelope for achieving the objects above are defined in the appended claims and discussed below.
- A system for automatic handling of a pile of sheets of packaging material according to the present invention comprises an unwrapping apparatus. The unwrapping apparatus comprises a support device for receiving the pile which is wrapped in a piece of wrapping material that has been folded and provided with seals to form an envelope enclosing the pile. The unwrapping apparatus further comprises an opening device for unwrapping the wrapping material to expose the pile of sheets.
- The sheets can be plain and unfolded and adapted for later forming and sealing. Alternatively, they can be (partly) formed and sealed and ready to be raised, e.g. be formed as flat-folded blanks as described by way of introduction.
- The pile is formed by arranging a predetermined number of sheets on top of each other in an aligned manner and the final outer shape of the pile is dependent upon the shape of the sheets. In connection with a conventional rectangular sheet form, the pile will have the form of a rectangular parallelepiped.
- The support device is arranged to carry the pile of sheets during unwrapping and can, to this end, have any suitable construction. As an example, the support device may be formed as a simple plate.
- The wrapping material can be any suitable material, such as paper, plastic film or the like. It is folded, according to a predetermined pattern, around the pile to, at least partly, enclose the same. In order to fix the folding, the wrapping material is sealed in predetermined areas, according to a certain pattern, whereby an envelope is formed. By seal is meant two or more wrapping material contact surfaces connected by some sort of sealing means. Examples of sealing means possible for use in connection with the present invention are tape, magnetic marks and different types of adhesives, such as adhesives that soften or melt when exposed to radiation of some kind, heat, electricity, magnetism, etc, i.e. conduction, convection, radiation, or induction/hysteresis.
- In accordance with the present invention, the envelope is opened by unwrapping or unfolding the wrapping material. Thus, the wrapping material is not torn (at least not outside the sealed areas) or cut but instead the envelope is opened in a careful way. Consequently, dust generation in connection with envelope opening is reduced.
- According to one embodiment of the present invention, the opening device is arranged to unwrap the wrapping material without breaking it. More particularly, this embodiment offers a completely undestructive envelope opening which leaves the corresponding piece of wrapping material intact. Thereby, the dust generation is minimized.
- According to one embodiment of the present invention, the opening device is arranged to interact with the wrapping material so as to enable breaking of at least a first set of the seals to enable unwrapping of the wrapping material. The result of the final seal breaking is dependent upon how the interaction is made and how the seal has been formed, more particularly, the sealing means used. More precisely, the seal breaking may leave all the contact surfaces involved intact or leave one or more of the contact surfaces involved damaged.
- As an alternative or complement to the embodiment above, the unwrapping device may further comprise an exposing device for subjecting the pile wrapped in wrapping material to a condition enabling breaking of at least a second set of the seals to enable unwrapping of the wrapping material. Naturally, the appropriate condition is dependent upon the sealing means used. For example, the condition may involve application of heat or an electric or magnetic field. Further, the result of the final seal breaking is dependent upon i.e. exposure time, exposure intensity and the sealing means used. More precisely, the seal breaking may leave some or all of the contact surfaces involved with a layer of sealing means.
- The first and second sets of seals may be, but do not have to be, wholly or partly the same which may imply that the opening device and the exposing device cooperate to break the seals.
- The exposing device could be arranged to subject the entire wrapped pile to said condition. Though, according to a preferred embodiment, the exposing device is arranged to act locally on areas of the envelope containing the second set of seals. This enables a fast and energy effective seal breaking.
- In accordance with the present invention, the exposing device is movable in relation to the support device so as to assume a first position where it is active and work to enable breaking of at least the second set of seals and a second position where it is passive. This facilitates handling of the pile of sheets since the exposing device can be moved out of the way when it is not active.
- As mentioned above, said condition to which the wrapped pile is subjected for enabling seal breaking, could involve heating. This is beneficial since is enables a mechanically simple and relatively inexpensive construction of the inventive system.
- The system according to the present invention may be so constructed that the opening device is arranged to move between a first and a second position while engaging with the wrapping material to unwrap it.
- According to one specific embodiment, the above engagement is accomplished by suction which enables a particularly mechanically simple and reliable construction of the system.
- Besides for comprising the above described unwrapping apparatus, the system according to the present invention may comprise an automatic loading apparatus for transferring at least a part of the pile of sheets from the unwrapping apparatus to a packaging machine after unwrapping of the wrapping material. This is advantageous since it relieves the operator of another manual operation involving lifting and perhaps twisting.
- The above loading apparatus may be formed in a number of different ways but comprises, according to one embodiment of the present invention, gripping means arranged to grab said part of the pile by engaging with a first and a last sheet thereof and forcing them towards each other to squeeze and hold intermediate sheets. Again, this enables a particularly mechanically simple and reliable construction of the system.
- Additionally, the inventive system may comprise an automatic feeding apparatus for transporting the pile of sheets wrapped in wrapping material from a pallet to the unwrapping apparatus. Again, this is advantageous since it relieves the operator of another manual operation involving lifting and perhaps twisting.
- Finally, in accordance with one embodiment, the system further comprises means for reading an information mark comprised in the envelope to enable correct handling of the pile. Such a mark could contain information on, for example, the type and number of sheets contained in the envelope or the orientation of the envelope. The system could further be arranged to adjust itself in dependence of the specific information contained in the mark.
- A method of automatically handling a pile of sheets of packaging material according to the present invention comprises the steps of receiving, on a support device, the pile which is wrapped in a piece of wrapping material that has been folded and provided with seals to form an envelope enclosing the pile, and unwrapping the wrapping material to expose the pile of sheets.
- An envelope for enclosing a pile of sheets of packaging material according to the present invention is formed by a piece of wrapping material that has been folded and provided with seals. The envelope is arranged to be automatically handled by a system according to the present invention.
- The characterizing features which were discussed in connection with the system according to the present invention are naturally transferable to the corresponding method and envelope according to the present invention. Moreover, these characterizing features may naturally be combined in one and the same embodiment.
- The present invention will now be described in greater detail herein below, with reference to the accompanying schematic drawings which show examples of a currently non-restrictive preferred embodiment of the present invention. In the accompanying drawings:
-
Figure 1 illustrates a pile of blanks wrapped in an envelope according to the present invention, -
Figure 2 illustrates the pile of blanks and the envelope offigure 1 , the envelope being partially unwrapped or unfolded, -
Figure 3 schematically illustrates a system according to the present invention, -
Figures 4 and6 are front views schematically illustrating a part of the system offigure 3 in more detail, -
Figure 5 is a view from above of the part shown infigure 4 , -
Figure 7 and 8 are simplified side views of the part shown infigure 4 , and -
Figure 9 is a flow diagram which illustrates a method according to the present invention. - In
figures 1 and 2 , apile 10 of a predetermined number of flat-foldedblanks 12 of packaging material (of which only a few has been illustrated) is shown. Thepile 10 is wrapped in arectangular piece 14 of wrapping paper that has been folded and sealed so as to form anenvelope 16 enclosing the pile, as is illustrated infigure 1 . Theenvelope 16 comprises seven point shaped seals 18 (18'+ 18") (illustrated by circles drawn with dashed lines) of which only five have been illustrated infigure 1 . The seals 18' exist between flap a and flap b while theseals 18" exist between flap c and d. The seals 18 (18'+ 18") comprise a sealing means in the form of a hot-melt fixing the folding of the wrapping paper by binding together a number of contact surfaces of the wrapping paper. By contact surface is meant parts of the wrapping paper intended as fixing points. -
Figure 3 schematically illustrates asystem 20 for automatic handling of piles which works in accordance with a method illustrated by the flow diagram infigure 9 . Thesystem 20 comprises anautomatic feeding apparatus 22, anautomatic unwrapping apparatus 24 and anautomatic loading apparatus 26. The piles of 10 ofblanks 12 enclosed or wrapped by respective envelopes 16 (as described with reference tofigures 1 and 2 ) are delivered to the packaging machine (not shown in its entirety) loaded ontopallets 28, each pallet being loaded with a predetermined number of wrapped piles arranged according to a certain loading pattern. Thefeeding apparatus 22 is arranged to move the wrapped piles, one by one, from thepallet 28 to the unwrappingapparatus 24. For this purpose the feeding apparatus (which will not be described in detail herein) comprises a pick andplace arrangement 30, aconveyor arrangement 32 and a control unit (not shown). The pick andplace arrangement 30 comprises a grippingmeans 34 arranged to pick a wrapped pile form the pallet 28 (step S1) by grabbing it from opposite sides. To this end, the grippingmeans 34 comprisesarms 36, the distance between which is adjustable, as is illustrated by the double arrow A. Then, the pick andplace arrangement 30 moves the wrapped pile to place it onto theconveyor arrangement 32 before releasing it (step S1). Arranged on theconveyor arrangement 32, the wrapped pile is conveyed to the unwrapping apparatus 24 (step S2), which is illustrated in more detail (but still schematically) infigures 4-8 . - The unwrapping
apparatus 24 comprises a support device in the form of a table 38 arranged adjacent to theconveyor arrangement 32. The wrappedpile 10 is fed onto the table 38 by the conveyor arrangement 32 (step S3), by means of acarrier 40 protruding from theconveyor arrangement 32. The table 38 is movable between two positions; an upper position dedicated for the above described transfer of the wrapped pile from the conveyor arrangement to the table, which is illustrated by dashed lines infigure 3 , and a lower position, illustrated by solid lines infigure 3 , dedicated for unwrapping of the pile, as will be further described hereinafter. - Thus, after the wrapped
pile 10 has been loaded onto the table 38, the table is moved from the upper to the lower position (step S4) for unwrapping of the pile. In the lower position, the table 38 is arranged adjacent to anopening device 42 and an exposingdevice 44, which are also comprised in the unwrappingapparatus 24. - The
opening device 42 comprises anelongate rail 46 provided with two suction means 48 arranged to engage with the wrapping paper enclosing the pile and pull it in a direction from the pile to unfold the envelope. For performing this operation, the opening device is movable between a first position, more particularly a front, lower position, which is shown infigure 6 , and a second position, more particularly a rear, upper position, which is shown infigures 3 ,4 and 5 . When the opening device moves from the first to the second position, the suction means 48 are active for connecting to the wrapping paper and enable unfolding of the envelope. In addition to being moveable between the first and second positions, the opening device is further movable between the second position and a back third position, which is illustrated with dashed lines infigure 5 . When the opening device moves from the second to the third position, the suction means 48 are active. This will be further discussed bellow. For the sake of clarity, the first, second and third positions of theopening device 42 have also been illustrated infigure 7 (where the exposing device has been omitted) - the first position with solid lines and the other two positions with dashed lines. From this figure it is evident that theopening device 42 moves along an arc between the first and the second position. - The exposing
device 44 comprises arail 50 bent into U-shape and provided with sevenhot air nozzles 52 arranged to heat theseals 18 to make the hot-melt soften to such an extent that theseals 18 can be broken without damaging the wrapping paper. The exposingdevice 44 is movable in relation to the table 38, more particularly pivotable about an axis X, between a first active position, which is illustrated infigures 3 and5 , and a second passive position, which is illustrated infigures 4 and6 . Further, the design of the exposing device is adapted to the design of the envelope enclosing the pile. More particularly, the dimensions of the rail U-shape are such that therail 50, in the first active position, surrounds the wrapped pile on three sides with a predetermined distance to the sides. Further, thehot air nozzles 52 are so positioned on therail 50 that they, in the first active position of the exposingdevice 44, are arranged in line with a respective one of theseals 18. Thereby, the hot air can be applied locally to the envelope in those areas where theseals 18 can be found. For the sake of clarity, the first active and second passive positions of the exposingdevice 44 have also been illustrated infigure 8 (where the opening device has been omitted) - the first active position with dashed lines and the second passive position with solid lines. - When the table 38 is arranged in its upper position, the
opening device 42 is arranged in its second (upper, rear) position while the exposingdevice 44 is arranged in its second (passive) position. After being provided with a pile of blanks to be unwrapped like the one illustrated infigure 1 , the table begins to move towards its lower position. When the table reaches its lower position, the situation illustrated infigure 4 prevails, i.e. theopening device 42 and the exposingdevice 44 are still arranged in their respective second positions. Next, the exposingdevice 44 turns to assume its first (active) position (step S5), wherein it partly surrounds the envelope, as described above. In connection therewith, thenozzles 52 begin to output hot air towards theseals 18 of the envelope (step S6). This condition is illustrated infigure 5 . After a predetermined exposure time, the hot air flow from the nozzles is throttled and the exposingdevice 44 turns to assume its second (passive) position (step S7). In connection therewith, theopening device 42 moves to assume its first (lower, front) position (step 8) and the suction means 48 are activated (step S9) for engagement with the wrapping paper, as previously described. This condition is illustrated infigure 6 . After proper engagement between the wrapping paper and the suction means 48 has been established, the opening device starts to move towards its second position (step S10). When moving upwards and backwards, the opening device pulls the wrapping paper along and away from the pile whereby the envelope is unwrapped or unfolded and the blanks are exposed. A partially unfolded envelope is illustrated infigure 2 . When the opening device has reached its second position, it stops but the suction means continues to engage with the wrapping paper. - The
loading apparatus 26 of thesystem 20 is arranged to move the exposedpile 10 ofblanks 12 from the table 38 of the unwrappingapparatus 24 to amagazine 54 of a packaging machine (not further illustrated) (step S11). For this purpose the loading apparatus 26 (which will not be described in detail herein) comprises a control unit (not shown) and a pick andplace arrangement 56, similar to the pick andplace arrangement 30 of thefeeding apparatus 22. The pick andplace arrangement 56 comprises a gripping means 58 arranged to pick thepile 10 from the table 38. To this end, the gripping means 58 comprisesarms 60, the distance between which is adjustable, as is illustrated by the double arrow B. Thesearms 60 are arranged to engage with a respective one of the first and last blanks of thepile 10 to force these against each other and squeeze and hold the intermediate blanks. After picking, the pick andplace arrangement 56 moves the pile of blanks to place it in themagazine 54 before releasing it. Arranged in the magazine, the blanks are ready to, one by one, be raised, filled and sealed, which operations will not be further discussed herein. - After the pile of blanks has been picked from the table 38 of the unwrapping
apparatus 24, theopening device 42, still engaging with the wrapping paper, moves from the second position to the third position pulling thepiece 14 of wrapping paper along and away from the table 38 (step S12). When the opening device reaches the third position it stops and the suction means are deactivated to release the wrapping paper (S13). Positioned right under the opening device, when this is arranged in the third position, is a recycling bin (not shown) collecting the wrapping paper when it is released. After this operation the opening means moves back to its second position to await another pile of blanks to be unwrapped (step S14). - The above described embodiment should merely be considered as an example. A person skilled in the art will readily perceive that this embodiment may be modified and varied in a number of different ways without departing from the inventive concept as herein disclosed.
- For example, the system could be constructed so as to be adaptable for handling different types of piles of sheets, e.g. piles of different sizes. The size of a pile can, for example, be different depending on the number and/or the size of the sheets contained in the pile. The size of the sheets is naturally dependent on the desired volume of packaged to be manufactured.
- As a further example, the system could further comprise means 62 (schematically illustrated in
figure 3 ) for reading an information mark 64 (schematically illustrated infigure 1 ) comprised in theenvelope 16 to enable correct handling of the pile of blanks. Such information could, for example, comprise the size and/or orientation of the pile enclosed by the envelope. The orientation of the pile could, for example, be dependent on the loading pattern of the pallet. Theinformation mark 64 could, for example, be in the form of a bar code, a magnetic mark, a tag, etc. - For example, other sealing means than hot-melt can be used in connection with the present invention. As an example, other types of adhesives could be used, both adhesives that would require exposure to other conditions than heat, e.g. another type of irradiation, a magnetic field or an electric field, to enable undestructive (with respect to the wrapping material) seal breaking, and adhesives that would require no specific exposure to allow undestructive seal breaking. An example of the latter type of adhesive is an adhesive of the type used on Post-it® notes. Naturally, use of such adhesive would allow omission of the exposing device of the system according to the present invention since the seals could be broken by the opening device pulling the wrapping material.
- It is also conceivable that a very limited damage of the wrapping material could be allowed in connection with pile unwrapping, i.e. damage in the form of a torn outer layer of the wrapping material at the contact surfaces, that is in the areas of the seals. For such an application, in principle any sealing means could be used. Further, such an application would allow omission of the exposing device of the system according to the present invention since the seals could be broken by the opening device pulling the wrapping material.
- Furthermore, all seals of an envelope are not of the same kind and/or must be broken in the same way. As an example, a first sealing means could be used for a first set of the seals of an envelope (for example seals 18' of
figure 1 ) and a second different sealing means could be used for a second set, possibly the rest, of the seals of the envelope (for example seals 18" offigure 1 ). Here, the first set of seals are arranged to be broken by the opening device pulling the wrapping material whereas the second set of seals are arranged to be broken by the exposing device subjecting the envelope to a certain condition, such as heat. - Naturally, conceivable are also embodiments wherein all or some of the seals are arranged to be broken by a combination of the exposing device subjecting the envelope to a certain condition and the opening device pulling the wrapping material.
- In the above described embodiment, spots of sealing means, more particularly hot-melt, were applied to the wrapping paper to form the envelopes, which resulted in point shaped seals. Naturally, the sealing means could be applied to the wrapping material according to any pattern. As an example, the sealing means could be applied to the wrapping material in lines. Naturally, a change of the sealing means pattern could require a change of the unwrapping apparatus, to enable seal breaking along the complete extension of the seals.
- Further, in the above described embodiment, the exposing device is, with its relative small nozzles, arranged to act locally on areas of the envelope containing the seals. Naturally, the exposing device could instead be arranged to act on larger parts of, or even the whole, envelope o as to enable seal breaking.
- Furthermore, in the above described embodiment, the seals have been heated to the softening point of the hot-melt by being subjected to hot air. Naturally, there are alternative ways of heating the seals. As an example, a hot bar could be pressed against the envelope to heat the seals. Additionally, other adhesives requiring heating to the melting point to allow seal breaking could be used.
- The above described envelopes have the form of a rectangular parallelepiped and consist of wrapping paper that has been folded and sealed. Of course, the invention could be used in connection with envelopes with other forms and folding patterns. Naturally, other materials than pure paper can be used as wrapping material. As an example, a wrapping material containing a (spot wise) layer of a conductive material could be used. Such a material could enable use of an adhesive which softens or melts when exposed to an electric field.
- In the above described embodiment, the steps of the inventive method have been performed in a certain order. Naturally, variants of this are possible. As an example, in accordance with an alternative embodiment, the opening device can be arranged to engage with the wrapping material to unfold the same while the exposing means are still, actively or passively, surrounding the pile of blanks.
- According to the embodiment above, the opening device engages with the envelope at an upper surface thereof. The opening device could, in accordance with an alternative embodiment, be arranged to (also) engage with other parts of the envelope. The opening device and the exposing device could further be integrated in one single unit. As an example, the exposing device could be provided with suction means for performing the unfolding operation, which would enable omission of a separate opening device.
- Finally, it should be observed the figures are highly simplified and not drawn to scale.
Claims (13)
- System (20) for automatic handling of a wrapped pile (10) of sheets (12) of packaging material, wherein the pile is (10) wrapped in a single piece (14) of wrapping material that has been folded and provided with at least a first and second set of seals (18' and 18") to form an envelope (16) enclosing the pile (10), the system comprising an unwrapping apparatus (24), which in turn comprises:a support device (38) for receiving the wrapped pile (10),an exposing device (44), arranged to heat at least the second set of the seals (18"), such as to enable the opening device (42) to unwrap the wrapping material without breaking it,wherein the exposing device (44) is movable in relation to the support device (38) so as to assume a first position where it is active and work to enable breaking of at least second set of seals (18") and a second position where it is passive,an opening device (42) for unwrapping the wrapping material to expose the pile (10) of sheets (12) and configured to break the first set of seals if not broken by the exposing device.
- System (20) according to claim 1, wherein the exposing device (44) is arranged to act locally on areas of the envelope (16) containing the second set of seals (18").
- System (20) according to any preceding claim, wherein the heat is supplied by conduction, convection, radiation, induction or hysteresis.
- System (20) according to any preceding claim, wherein the opening device (42) is arranged to move between a first and a second position while engaging with the wrapping material to unwrap it.
- System (20) according to any preceding claim, wherein the opening device (42) comprises a number of suction means (48) for engaging with the wrapping material by suction.
- Method of automatically handling a wrapped single pile (10) of sheets (12) of packaging material comprising
receiving (step S3), on a support device (38), the pile which is wrapped in a single piece (14) of wrapping material that has been folded and provided with a first and second set of seals (18' and 18") to form an envelope (16) enclosing the pile,
comprising moving (step S5 + S7), in relation to the support device (38), the exposing device (44) between a first position where it is active and work to enable breaking of at least the second set of seals (18) and a second position where it is passive,
subjecting (step S6), using an exposing device (44), the pile (10) wrapped in wrapping material to a condition enabling breaking of at least the second set of the seals (18) to enable unwrapping of the wrapping material without breaking the wrapping material, and
unwrapping (step S10), by means of an opening device (24) and the opening device being configured to break the first set of seals if not broken by the exposing device, the wrapping material to expose the pile (10) of sheets (12). - Method according to claim 7, comprising letting the exposing device act (step S6) locally on areas of the envelope (16) containing said second set of seals (18").
- Method according to any one of claims 6-7, wherein said condition involves heating of the at least second set of seals (18").
- Method according to any one of claims 6-8, comprising moving (step S8 + S10) the opening device (42) between a first and a second position while it is engaging with the wrapping material to unwrap it.
- Method according to claim 9, comprising engaging with the wrapping material by suction.
- Method according to any one of claims 6-10, further comprising transferring (step S11) at least a part of the pile (10) of sheets (12) form the support device (38) to a packaging machine after unwrapping of the wrapping material.
- Envelope (16) for enclosing a single pile (10) of sheets (12) of packaging material, said envelope (16) being formed by a piece (14) of wrapping material that has been folded and provided with at least a first set and a second set of seals (18',18") at least the second set of seals being arranged to be broken when subjected to a condition enabling breaking of the second set of seals by an exposing device, the envelope thus being arranged to be opened without being broken, according to the system of claim 1 and according to the method of claim 6.
- Envelope (16) according to claim 12, comprising an adhesive in the form of a hot-melt binding together different parts of the piece (14) of wrapping material to form the seals (18), wherein the adhesive is applied in isolated points or in isolated strings.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1150033 | 2011-01-20 | ||
PCT/SE2012/050046 WO2012099530A1 (en) | 2011-01-20 | 2012-01-20 | System, method and envelope |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2665656A1 EP2665656A1 (en) | 2013-11-27 |
EP2665656A4 EP2665656A4 (en) | 2014-06-25 |
EP2665656B1 true EP2665656B1 (en) | 2017-04-26 |
Family
ID=46515961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12737031.0A Not-in-force EP2665656B1 (en) | 2011-01-20 | 2012-01-20 | System, method and envelope |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2665656B1 (en) |
JP (1) | JP6166182B2 (en) |
DK (1) | DK2665656T3 (en) |
WO (1) | WO2012099530A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1404925B1 (en) * | 2010-11-25 | 2013-12-09 | Clevertech Srl | APPARATUS AND METHOD TO REMOVE A PACKAGING FILM FROM A PACKAGE OF OBJECTS |
CN114644159A (en) * | 2020-12-17 | 2022-06-21 | 云南烟草机械有限责任公司 | Shell removing method and shell removing equipment for hard cigarette packets |
CN114644158A (en) * | 2020-12-17 | 2022-06-21 | 云南烟草机械有限责任公司 | Method and equipment for detaching shells of cigarettes |
CN114644160A (en) * | 2020-12-17 | 2022-06-21 | 云南烟草机械有限责任公司 | Shell removing method and shell removing equipment for soft cigarette packet |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5181652A (en) * | 1988-02-02 | 1993-01-26 | Elopak Systems Ag | Packaging |
FI79682C (en) * | 1988-02-02 | 1990-02-12 | Elopak Oy | Method for emptying a jump-compressible load from a carton box and a carton box for carrying out the procedure |
JP2983992B2 (en) * | 1988-09-01 | 1999-11-29 | 日本テトラパック株式会社 | Transfer device for blanks for packaging containers |
JP3010670B2 (en) * | 1990-02-22 | 2000-02-21 | 松下電器産業株式会社 | Wiring circuit board packaging, and method and apparatus for removing wiring circuit board from wiring circuit board packaging |
JPH10258815A (en) * | 1997-03-17 | 1998-09-29 | Rengo Co Ltd | Unpacking previous treatment device of packaged case |
JP4089848B2 (en) * | 1998-01-30 | 2008-05-28 | 日本製紙株式会社 | Unsealing device using bonded part of package and cutting blade used therefor |
DE102004003232A1 (en) * | 2004-01-22 | 2005-08-11 | Groninger & Co Gmbh | Method and device for removing a cover from a magazine box |
JP2011123847A (en) * | 2009-12-14 | 2011-06-23 | Oki Electric Industry Co Ltd | Paper sheet processor |
-
2012
- 2012-01-20 DK DK12737031.0T patent/DK2665656T3/en active
- 2012-01-20 JP JP2013550447A patent/JP6166182B2/en not_active Expired - Fee Related
- 2012-01-20 WO PCT/SE2012/050046 patent/WO2012099530A1/en active Application Filing
- 2012-01-20 EP EP12737031.0A patent/EP2665656B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
JP6166182B2 (en) | 2017-07-19 |
EP2665656A1 (en) | 2013-11-27 |
DK2665656T3 (en) | 2017-07-17 |
EP2665656A4 (en) | 2014-06-25 |
JP2014502943A (en) | 2014-02-06 |
WO2012099530A1 (en) | 2012-07-26 |
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