NL2021639B1

NL2021639B1 - Partially transparent disposable piping bag

Info

Publication number: NL2021639B1
Application number: NL2021639A
Authority: NL
Inventors: Cornelis Van Der Straaten Jan
Original assignee: One Way Plastics B V
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2020-05-07

Abstract

The present invention relates to a piping bag. More in particular, the present invention relates to a piping bag for applying a foodstuff to a substrate, wherein the piping bag is of the disposable type. The present invention further relates to a co-extruded tubular foil from which such a piping bag can be obtained and to a method for providing artwork and/or text on such a piping bag. According to the invention, the outer layer and the inner layer of the tubular foil are transparent and the intermediate layer of the tubular foil is partially transparent through a distribution of pigment additives in the intermediate layer that is non-uniform in at least a direction perpendicular to the axial direction.

Description

Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.

Partially transparent disposable piping bag

The present invention relates to a piping bag. More in particular, the present invention relates to a piping bag for applying a foodstuff to a substrate, wherein the piping bag is of the disposable type. The present invention further relates to a co-extrudcd tubular foil from which such a piping bag can be obtained and to a method for providing artwork and/or text on such a piping bag.

The use of piping bags for applying foodstuffs to a substrate has been known for a long time. In the past, mainly cotton piping bags were used. These bags may be cleaned after use, although the process of cleaning can be both difficult and time consuming. Another type of piping bags, referred to hereinafter as disposable piping bags, is made from a different material, namely polymer materials. Typically, these piping bags are used only once or a few times before they are discarded.

EP 1978809 Bl discloses a co-extruded multilayer piping bag wherein at least one portion of the outer side of the bag comprises a rubber composition located to improve grip for a user of the piping bag during the application of the foodstuff to the substrate, wherein the rubber composition comprises a thermoplastic elastomer. This piping bag allows the user to maintain grip even under moist or fatty conditions, e.g. when applying whip cream or the like.

The abovementioned piping bag is provided on a roll. This roll comprises a tubular foil comprising an arrangement of identical foil blocks that are repeated in an axial direction of the tubular foi l, each foil block comprising a welded seam that connects two opposite sides of the tubular foil thereby at least partially defining at least two piping bags. Furthermore, the tubular foil, and therefore the piping bag itself, has an opaque and green appearance due to the addition of pigment additives during the co-extrusion process of the tubular foil. These pigment additives result in a green color of the tubular foil. The addition of these additives is required to comply with food safety regulations. For example, to obtain a piping bag, it has to be separated from the remainder of the tubular foil. At that time, the dispensing end of the piping bag is still closed. A user has to cut the bottom end of the piping bag, the so-called tip region, to create a dispensing opening through which a dispensing nozzle may be arranged. A problem may however arise when the severed part is lost, particularly when it is lost in other foodstuff such as a cake or the like. If the piping bag is transparent, the severed part cannot easily be recognized. A danger therefore exists that the severed part will be lost causing health hazards for the end consumer as the severed part may end up in the final food product.

In addition to the abovementioned colored co-extruded piping bags, other co-extruded piping bags are known that are fully transparent but wherein the tip region is covered with ink to address the health hazards mentioned above. These piping bags offer the advantage that a user can see the contents of the pip ing bag as it is made of transparent material. However, a drawback of these piping bags is related to the ink that is applied to the tip region . Especially in fatty conditions, the ink may dissolve or may otherwise mix with the foodstuff causing inconvenience and/or health hazards for the end user.

An object of the present invention is to provide a piping bag of which the user may inspect the inside but which still complies with modern day food safety requirements.

This object has been achieved with the co-extruded multilayer tubular foil as defined in claim 1 which comprises an arrangement of identical foil blocks that are repeated in an axial direction of the tubular foil, each foil block comprising a welded seam that connects two opposite sides of the tubular foil thereby at least partially defining at least two piping bags. According to the invention, the tubular foil comprises an outer layer., an inner layer, and an intermediate layer arranged in between the outer layer and the inner layer, wherein the outer layer and inner layer are transparent and the intermediate layer is partially transparent through a distribution of pigment additives in the intermediate layer that is non-uniform in at least a direction perpendicular to the axial direction.

The Applicant has found that a piping bag wherein pigment additives are only nonuniformly distributed in the intermediate layer can be more readily fabricated using co-extrusion than a piping bag wherein such additives are non-uniformly distributed in the outer and/or inner layer.

The abovementioned direction that is perpendicular to the axial direction may be a circumferential direction. For example, the tubular foil may display a different opacity along its circumference, wherein at least a part of the tubular foil is transparent to the extent that a user may inspect the contents of the piping bag during use. Moreover, the distribution of pigment additives in the intermediate layer may additionally be non-uniform in the axial direction.

Within the context of the invention, a layer is said to be transparent if a user can see through the layer for the purpose of inspecting the contents in the piping bag. In some embodiments, a transparent layer is a layer that is made using essentially transparent polymer materials. Such a layer is generally devoid from any pigment additives. Furthermore, the pigment additives of the present invention are generally applied in such a concentration that a user cannot see through the respective region in which the additives are used.

Each foil block may further comprise a transverse perforation line arranged perpendicular to the axial direction. Additionally or alternatively, the welded seam may extend obliquely across the foil block and may define, together with edges of the tubular foil, a tip region for each of the at least two piping bags. By applying the welded seam to the tubular foil, the foil becomes flattened. In such flattened state, opposite edges of the tubular foil, which extend along the axial direction, can be identified. Here, the welded seam preferably extends between these opposite edges of the tubular foil. The welded seam connects opposite sides of the tubular foil as this seam defines an outer edge of the piping bags. Furthermore, the welded seam may comprise two welded sub-seams in between which a perforation line is arranged. Such welded seam allows the separation of two piping bags that are located in the same foil block along this perforation line while at the same time maintaining the airtight edge definition of both piping bags by means of the two welded sub-seams.

The transverse perforation line or other weakening of the foil allows two adjacently arranged piping bags in different foil blocks of the foil to be easily separated.

Typically, a foil block defines two piping bags. As an example, a foil block may start with a transverse perforation line followed by an angled welded seam that starts at one edge of the tubular foil offset from the transverse perforation line and ends at the opposite edge of the tubular foil offset from the transverse perforation line of the adjacent foil block.

The intermediate layer may comprise a first region and a second region, wherein the first region and second region are mutually connected and adjacently arranged in a direction parallel to a surface of the tubular foil. This direction is preferably the abovementioned circumferential direction. Tn addition, the second region of the intermediate layer is transparent and the first region of the intermediate layer comprises at least a part of the pigment additives to provide a colored strip that extends in the axial direction, wherein the colored strip at least partially colors the tip region.

Using a first and second region in which pigment additives are and are not present, respectively, offers the advantage of only applying the coloring where it is needed, namely the tip region, thereby saving costs and offering the user the maximum amount of transparency that is feasibly without jeopardizing food safety.

The first region may comprise a first side and a second side that are connected to a first side and a second side of the second region, respectively. In this embodiment, the intermediate layer only comprises a single first region and a single second region. Moreover, the size of the second region may be much larger than the size of the first region, thereby resu lting in a piping bag that is essentially transparent but which has a colored strip for example allowing the identification of a severed tip region. Alternatively, the size of the second region may be much smaller than the size of the first region, thereby resulting in a piping bag that is essentially opaque but which has a transparent strip allowing the user to inspect the contents of the piping bag, for example to determine the quantity that is still left in the piping bag.

In another embodiment, the piping bag further comprises a further first region having one or more pigment additives, and a further second transparent region, wherein the first region and the further first region are each arranged between the second region and the further second region. In this embodiment, at least four different regions can be identified. In a particular embodiment, four different regions are used wherein the first regions are arranged near the edges of the tub ular foil to color the tip regions of both piping bags. The arrangement of the first and second regions is preferably symmetric. Furthermore, the second region and the further second region are preferably aligned with each other to form a transparent window to provide a view through the tubular foil.

Various polymer materials can be used for realizing the inner, outer, and intermediate layers. Preferably, the inner layer comprises a polyolefin, such as low density polyethylene (LDPE). The outer layer preferably comprises a rubber-containing composition incorporating a thermoplastic elastomer located to improve grip for a user of a piping bag obtained from said tubular foil during the application of foodstuff to a substrate. The first, second, and/or third regions may comprise a polyolefin, such as low density polyethylene (LDPE). This composition of layers provides the advantages of having an improved grip while still allowing a user to inspect the contents of the piping bag. The thicknesses of the inner layer and outer layer may each lie within a range from 20 to 50 microns, and a thickness of the intermediate layer may lie within a range from 10 to 30 microns.

The first region, the further first region, the second region, and/or the further second region may comprise pigment particles for laser marking, such as mica particles, preferably mica platelets covered by TiO₂, SnO₂, or SbO₂. When these particles are illuminated with a suitable focused light source, such as a laser, the incident light is absorbed causing the temperature of the pigment particles to increase rapidly. Consequently, the polymer material surrounding the pigment particles is carbonized. For example, the polymer material turns black specifically at the point targeted by the laser. Examples of pigment particles are Iriotec® 8000 series laser pigments, or the ACTELAR® laser master batch.

By adding the pigment particles for laser marking it becomes possible to obtain a piping bag onto which artwork and/or text can be arranged. More importantly, compared to prior art solutions wherein artwork and/or text is provided on the piping bag by means of an ink-based and/or transfer printing process, the overall thickness of the roll of piping bags can be kept uniform along the longitud inal d irection of the roll. Such uniformity facilitates automated handl ing of the roll as its motion during roiling is well defined. Tn an ink-based and/or transfer printing process, the added ink adds locally to the overall thickness of the roll causing non-uniformity in thickness along the longitudinal direction of the roil. During automated handling, the roll may, during rolling, deviate from a. desired straight path, thereby complicating further handling steps, such as packaging.

Preferably, thicknesses of the first region, the further first region, the second region, and the further third region are identical. Additionally or alternatively, apart from the plurality of welded seams and perforation lines, a cross section of the intermediate layer is constant along the axial direction. However, the present invention does not exclude embodiments wherein the colored strip, or the transparent region, is curved along the axial direction of the tubular foil.

According to a. second aspect, the invention provides a piping bag that has been obtained by separating the tubular foil as defined above along the welded seam and perforation line.

According to a third aspect, the invention provides a method for providing a co-extruded multilayer piping bag with artwork and/or text, comprising providing the foil as defined above in which pigment particles for laser marking are provided, providing a source of focused light, such as a laser, and patterning the foil using the focused light for forming the artwork and/or text. Preferably, all the piping bags defined on the tubular foil are patterned before separating a piping bag from the remainder of the tubular foil. As an advantageous example, a scale may be patterned into the foil for allowing a user to determine a volume of contents present in the piping bag. Such scale could for instance be expressed in any suitable metric such as liter or milliliter. Additionally or alternatively, the scale may be indicative of the weight of a specific content when held in the piping bag. The scale is preferably provided in the transparent second region or transparent further second region.

According to a fourth aspect, the invention provides a piping bag obtained by applying the method as described above.

Next, the invention will be described in more detail referring to the appended figures, wherein:

Figure 1 illustrates a cross section of a first example of a known tubular foil for piping bags;

Figure 2 illustrates a top view of the tubular foil of figure 1;

Figure 3 illustrates a cross section of a first embod iment of a tubular foil for piping bags according to the invention;

Figure 4 illustrates a top view of the tubular foil of figure 3;

Figure 5 illustrates a cross section of a second embodiment of a tubular foil for piping bags according to the invention; and

Figure 6 illustrates a top view of the tubular foil of figure 5.

Figure 1 illustrates a cross section of an example of a known tubular foil 100 for piping bags and figure 2 illustrates a corresponding top view. Known tubular foil 100 comprises an outer layer 101, an intermediate layer 102, and an inner layer 103, which are all transparent. Due to angled welded seam 104, tubular foil 100 will attain a flattened shape allowing the identification of edges A and B.

Figure 2 shows how angled welded seam 104 and transverse perforation line 105 define piping bags P1-P4. More in particular, identical foil blocks 1061 and 106_2 can identified that are repeated in the axial or longitudinal direction of the foil. Angled welded seam 104 extends obliquely between edges A and B. This seam connects the opposite sides of the tubular foil to each other thereby flattening tubular foil 100. Transverse perforation line 105 extends between edges A and B in a direction that is perpendicular to the axial or longitudinal direction Typically, this perforation line allows easy separation of adjacent piping bags P2 and P3.

Piping bag P2 can be removed from tubular foil by cutting, or tearing along seam 104, and perforation line 105. A tip region 107 of piping bag P2 can be identified. This region is cut prior to use of piping bag P2. In addition, an opening is formed at the position of perforation line 105. Through this opening, foodstuff can be introduced in piping bag P2.

In the known piping bag of figures 1-2. the tip regions of the piping bags are covered with ink (not shown) to allow a severed tip region to be easily identified. In other known piping bags, the entire piping bag is colored.

Figure 3 illustrates a cross section of a first embodiment of a tubular foil 10 for piping bags according to the invention. The corresponding top view is illustrated in figure 4. In this embodiment, tubular foil 10 comprises an outer layer 11, an intermediate layer 12, and an inner layer 13. Within intermediate layer 12, a first colored region 17 and a second transparent region 18 can be identified. Here, region 17 extends over edges A and B such that the tip region is colored by first region 17. Moreover, the arrangement of first region 17 and second region 18 is symmetric relative to a central axis of tubular foil 10. Similar to the foil in figure 2, identical foil blocks 16 1, 16 2 can be identified that are repeated in the axial or longitudinal direction as well as transverse perforation lines 15 and angled welded seams 14.

In the figure 3 embodiment, a transparent w indow is formed in the piping bags as a result of transparent second region 18. In this embodiment, the size of second region 18 is smaller than that of first region 17. In the second embod iment of a tubular foil 20 for piping bags according to the invention, also comprising an outer layer 21, an intermediate layer 22, and an outer later 23 and shown in figures 5 and 6, the transparent regions of the piping bags are larger than the opaque regions. This is made possible, because tubular foil 20 now comprises a transparent second region 28 and a transparent further second region 28'. which regions are connected using a colored first region 27 and a. colored further first region 277 In this embodiment, the coloring is only applied to at least partially cover the tip region.

Pigment particles for laser marking could be applied in the figure 3 or 5 embodiments in any region of intermediate layer 12, 22. The distribution of these pigment particles need not correspond to the distribution of the pigment add itives used for coloring the tip region.

As an example, pigment particles may be distributed in transparent second region 18, 28 or the further transparent second region 287 Tubular foil 10, 20 may have been subjected to a laser marking process in which a scale 30 is patterned inside at least one of (further) second regions 18, 28, 287 Such scale, illustrated in figure 6. could be configured to indicate a measure of a volume of contents arranged inside the piping bag. Using this scale, a user of the piping bag may easily determine a quantity of foodstuff still present in the piping bag and/or may use the scale to precisely dispense a predefined amount of foodstuff in the piping bag.

To manufacture tubular foil 10, 20, a co-extrusion process is used. For the formation of intermediate layer 12, 22, at least two distinct flows of materials are used, e.g. one flow with pigment additives, and one flow without or with substantially less additives. Details on how to adapt the d ie and the co-extrusion process for the formation of d ifferent regions inside a layer are known for example from US 5110530 A.

Inner layer 13, 23 and intermediate layer 12, 22 of tubular foils 10, 20 may comprise a polyolefin, such as low density polyethylene (LDPE). Outer layer 11,21 of tubular foils 10, 20 may comprise a rubber-containing composition incorporating a thermoplastic elastomer located to i mprove grip for a user of a piping bag during the application of foodstuff to a substrate. Here, the rubber-containing composition may be identical to the rubber composition described in EP 1978809 Bl. Thicknesses of the inner layer and outer layer each lie within a range from 20 to 50 microns, and a thickness of the intermediate layer lies within a range from 10 to 30 microns.

The thermoplastic elastomer of the rubber composition is particularly chosen from the group of styrene-based elastomers, such as styrene-ethylene/butylene-styrene (SEBS) or styreneethylene/propylene-styrene and/or styrene butylene styrene (SBS). The elastomer can also be chosen from the group of thermoplastic vulcanized or non-vulcanized material (TPV/TPO) and comparable block copolymers. SEBS in particular can be applied. The rubber compositions particularly comprise, in addition to the rubber, one or a number of polyolefins, in particular polypropylene.

The rubber composition preferably comprises 20-90% rubber ((apolar) thermoplastic elastomer) and 80-10% other materials such as polyolefins, in particular polyethylene and/or polypropylene, white oils, softeners and the like. In a particular composition the rubber compound is formed by 45-85%, in particular 60-80% rubber and 55-15%, in particular 40-20% other materials. The Shore A hardness is preferably 55-75. Compositions for the rubber compound are described for instance in WO 95/03984 and WO 93/22221.

The Applicant has found that when using a piping bag comprising the abovementioned rubber composition in outer layer 11, 21, in combination with an ink-based and/or transfer printing process to add artwork and/or text onto the piping bag, a reduction in grip at the positions where the ink is applied can be observed. According to an aspect of the invention, this reduction in grip can be prevented by applying the pigment particles used for laser marking in intermediate layer 12, 22 and to use laser marking for adding the artwork and/or text.

In the description above, various embodiments have been described to illustrate the inventive concept of the present invention. However, a skilled person will readily understand that the present invention is not limited to these embodiments bnt that various modifications are possible without departing from the scope of the invention that is defined by the appended claims.

Claims

CONCLUSIESCONCLUSIONS

1. Gecoëxtrudeerde meerlaagse buisvormig folie, omvattende een rangschikking van identieke folieblokken welke zich herhalen in een axiale richting van de buisvormige folie, waarbij elk folieblok een gelaste naad omvat welke twee tegenovergelegen zijden van de buisvormige folie verbindt waardoor ten minste twee spuitzakken ten minste ten dele worden gedefinieerd;A coextruded multilayer tubular film, comprising an arrangement of identical film blocks that repeat in an axial direction of the tubular film, each film block comprising a welded seam connecting two opposite sides of the tubular film through which at least two piping bags are at least partially are defined;

waarbij de buisvormige folie een buitenlaag, een binnenlaag, en een tussenlaag gerangschikt tussen de buitenlaag en de binnenlaag omvat;the tubular film comprising an outer layer, an inner layer, and an intermediate layer disposed between the outer layer and the inner layer;

waarbij de buitenlaag en de binnenlaag doorzichtig zijn en de tussenlaag deels doorzichtig is door een verdeling van pigmenttoevoegingen in de tussenlaag welke niet uniform is in ten minste een richting loodrecht op de axiale richting.wherein the outer layer and the inner layer are transparent and the intermediate layer is partly transparent by a distribution of pigment additives in the intermediate layer which is not uniform in at least one direction perpendicular to the axial direction.

2. Buisvormige folie volgens conclusie 1, waarbij elk folieblok verder een dwarse perforatielijn omvat welke loodrecht op de axiale richting gerangschikt is, en waarbij de gelaste naad zich schuin uitstrekt over het folieblok en samen met randen van de buisvormige folie een puntgebied definieert voor elk van de ten minste twee spuitzakken;Tubular film according to claim 1, wherein each film block further comprises a transverse perforation line arranged perpendicular to the axial direction, and the welded seam extending obliquely over the film block and defining a point region for each of the edges of the tubular film. the at least two piping bags;

waarbij de tussenlaag een eerste gebied en een tweede gebied omvat, waarbij het eerste gebied en tweede gebied onderling verbonden en naast elkaar gerangschikt zijn in een richting parallel aan een oppervlak van de buisvormige folie;the intermediate layer comprising a first region and a second region, the first region and second region being interconnected and juxtaposed in a direction parallel to a surface of the tubular film;

waarbij het tweede gebied van de tussenlaag doorzichtig is en waarbij het eerste gebied van de tussenlaag ten minste een deel van de pigmenttoevoegingen omvat voor het verschaffen van een gekleurde strook welke zich uitstrekt in de axiale richting, waarbij de gekleurde strook het puntgebied ten minste ten dele kleur geeft.wherein the second region of the intermediate layer is transparent and wherein the first region of the intermediate layer comprises at least a portion of the pigment additives to provide a colored strip extending in the axial direction, the colored strip at least partially gives color.

3. Buisvormige folie volgens conclusie 2, waarbij het eerste gebied een eerste zijde en een tweede zijde omvat die respectievelijk zijn verbonden aan een eerste zijde en een tweede zijde van het tweede gebied.Tubular film according to claim 2, wherein the first region comprises a first side and a second side which are respectively connected to a first side and a second side of the second region.

4. Buisvormige folie volgens conclusie 2, verder omvattende een verder eerste gebied met een of meer pigmenttoevoegingen, en een verder tweede doorzichtig gebied, waarbij het eerste gebied en het verdere eerste gebied elk gerangschikt zijn tussen het tweede gebied en het verdere tweede gebied.The tubular film of claim 2, further comprising a further first region with one or more pigment additives, and a further second transparent region, wherein the first region and the further first region are each arranged between the second region and the further second region.

5. Buisvormige folie volgens conclusie 4, waarbij het tweede gebied en het verdere tweede gebied zijn uitgelijnd ten opzichte van elkaar voor het vormen van een doorzichtig venster om een zicht te verschaffen door de buisvormige folie.The tubular film of claim 4, wherein the second region and the further second region are aligned with each other to form a transparent window to provide a view through the tubular film.

6. Buisvormige folie volgens een van de conclusies 2-5, waarbij:Tubular film according to any one of claims 2-5, wherein:

de binnenlaag een polyolefine omvat, zoals lage-dichtheid polyethyleen (LDPE);the inner layer comprises a polyolefin such as low density polyethylene (LDPE);

de buitenlaag een rubber-bevattende samenstelling omvat waarin een thermoplastische elastomeer is opgenomen geplaatst voor het verbeteren van grip voor een gebruiker van een spuitzak verkregen uit de buisvormig folie tijdens het aanbrengen van een voedselproduct op een substraat; en de eerste, tweede en/of derde gebieden een polyolefine omvatten zoals lage-dichtheid polyethyleen (LDPE).the outer layer comprises a rubber-containing composition incorporating a thermoplastic elastomer positioned to improve grip for a piping bag user obtained from the tubular film during application of a food product to a substrate; and the first, second and / or third regions comprise a polyolefin such as low density polyethylene (LDPE).

7. Buisvormige folie volgens conclusie 6, waarbij diktes van de binnenlaag en buitenlaag elk liggen binnen een bereik van 20 tot 50 micrometer, en waarbij een dikte van de tussenlaag ligt binnen een bereik van 10 tot 30 micrometer.Tubular film according to claim 6, wherein thicknesses of the inner layer and outer layer are each within a range of 20 to 50 microns, and a thickness of the intermediate layer is within a range of 10 to 30 microns.

8. Buisvormige folie volgens een van de conclusies 2-7, waarbij het eerste gebied, hel verdere eerste gebied, het tweede gebied en/of het verdere tweede gebied pigmentdeeltjes omvat voor lasermarkering, zoals mica-deeltjes, bij voorkeur mica-plaatjes bedekt door TiO2, SnO2, of SbO2.Tubular film according to any one of claims 2 to 7, wherein the first region, the further first region, the second region and / or the further second region comprises pigment particles for laser marking, such as mica particles, preferably mica platelets covered by TiO2, SnO2, or SbO2.

9. Buisvormige folie volgens een van de voorgaande conclusies, waarbij diktes van het eerste gebied, het verdere eerste gebied, het tweede gebied en het verdere derde gebied identiek zijn.Tubular film according to any one of the preceding claims, wherein thicknesses of the first region, the further first region, the second region and the further third region are identical.

10. Buisvormige folie volgens een van de voorgaande conclusies, waarbij, los van het veelvoud aan gelaste naden en perforatielijnen, een doorsnede van de tussenlaag constant is langs de axiale richting.Tubular film according to any of the preceding claims, wherein, apart from the plurality of welded seams and perforation lines, a cross section of the intermediate layer is constant along the axial direction.

11. Buisvormige folie volgens een van de voorgaande conclusies, waarbij de gelaste naad zich uitstrekt tussen tegenoverliggende randen van de buisvormige folie.Tubular film according to any of the preceding claims, wherein the welded seam extends between opposite edges of the tubular film.

12. Spuitzak verkregen door het scheiden van de buisvormige folie zoals gedefinieerd in een van de voorgaande conclusies, voor zover afhankelijk van conclusie 2, langs de gelaste naad en perforatielijn.Pastry bag obtained by separating the tubular film as defined in any of the preceding claims, as far as dependent on claim 2, along the welded seam and perforation line.

13. Werkwijze voor het verschaffen van een gecoëxtrudeerde meerlaagse spuitzak met een grafische afbeelding en/of tekst, omvattende:Method for providing a coextruded multi-layer piping bag with a graphic image and / or text, comprising:

het verschaffen van de folie zoals gedefinieerd in een van de conclusies 8-12, voor zover afhankelijk van conclusie 8;providing the foil as defined in any one of claims 8-12, as far as dependent on claim 8;

het verschaffen van een bron van gefocusseerd licht, zoals een laser; en het aanbrengen van een patroon op de folie door gebruik te maken van het gefocusseerdeproviding a source of focused light, such as a laser; and patterning the film using the focused

5 licht voor het vormen van de grafische afbeelding en/of tekst.5 light for forming the graphic image and / or text.

14. Werkwijze volgens conclusie 13, waarbij alle op de buisvormige folie gedefinieerde spuitzakken van een patroon worden voorzien voorafgaand aan het scheiden van een spuitzak van het resterende deel van de buisvormige folie.The method of claim 13, wherein all piping bags defined on the tubular film are patterned prior to separating a piping bag from the remaining portion of the tubular film.

15. Werkwijze volgens conclusie 13 of 14, waarbij een patroon in de vorm van een schaal wordt aangebracht in de folie zodat een gebruiker het volume kan bepalen van een voedselproduct dat aanwezig is in de spuitzak, waarbij de schaal wordt verschaft in het doorzichtige tweede gebied of het doorzichtige verdere tweede gebied.A method according to claim 13 or 14, wherein a pattern in the form of a shell is applied in the foil so that a user can determine the volume of a food product contained in the piping bag, the shell being provided in the transparent second area or the transparent further second region.

16. Spuitzak verkregen door het toepassen van de werkwijze volgens conclusies 13, 14 of 15.Piping bag obtained by applying the method according to claims 13, 14 or 15.