MXPA06013767A

MXPA06013767A - Piping bag, blank for manufacturing a piping bag and method of manufacturing a piping bag.

Info

Publication number: MXPA06013767A
Application number: MXPA06013767A
Authority: MX
Inventors: Allan Ejeblad
Original assignee: Kee Plastics Ab
Priority date: 2004-05-26
Filing date: 2005-02-04
Publication date: 2007-04-23
Also published as: IL179464A0; KR20070038037A; IL179464A; CA2568448A1; NO20065279L; JP2007528823A; CA2568448C; NO330335B1; WO2005115162A1; AU2005247280B2; JP3131555U; AU2005247280A1; BRPI0511584A; JP4354486B2; KR101178623B1; NZ551422A; RU2006140853A; RU2371001C2

Abstract

A disposed piping bag (1) comprises a container of polymer film. The piping bag is formed essentially from a thin-walled polymer tube, and an outwardly oriented surface of the piping bag has a surface structure.

Description

PASTRY BAG. PREFORM TO MANUFACTURE A PASTRY SLEEVE AND MANUFACTURING METHOD OF A SLEEVE PASTRY FIELD OF THE INVENTION The present invention relates to disposable pastry sleeves as defined in the preamble of claim 1, and very specifically to disposable pastry sleeves used for food handling.

TECHNICAL BACKGROUND Pastry sleeves (or dullas) are used mainly for decorating cakes, confectionery and foods with a viscous, semi-liquid or semifluid paste, such as whipped cream, marzipan, dough, cream cheese, sugar paste or the like. Pastry sleeves can also be used for other purposes, for example for the application of glue, cement, plaster, molding compound or the like. A disposable pastry bag is shown in the document US 3,157,312. This pastry bag consists of a plastic bag, formed of two layers of polymer film, which have been welded together on the sides of the edges of the bag. The pastry bag is adapted, in one of its corners, to receive an essentially conical nozzle, through which a paste contained in the pastry bag can be discharged. The nozzle can be provided with a selected profile, so that the extruded paste cord can receive the desired appearance. A problem associated with disposable pastry sleeves of the prior art is that the pastry bag can be difficult to handle both during manufacture and in connection with the supply operation. Therefore, there is a need for an improved disposable piping bag.

BRIEF DESCRIPTION OF THE INVENTION An object of the present invention is to provide a disposable piping bag, which reduces or eliminates the problems associated with the prior art. The object is achieved by a pastry bag, a preform and a method according to the respective appended independent claims. Modalities are defined in the appended dependent claims as well as in the following description and drawings. According to a first aspect, therefore a disposable pastry bag comprising a polymer film container is provided. The pastry bag is characterized in that it is essentially formed of a thin-walled polymer tube, and in that an outwardly facing surface of the pastry bag is provided with a surface structure. Disposable here means that the pastry bag has to be discarded after use, and not cleaned and used again. However, this does not exclude that the pastry bag is re-filled and / or cleaned and, therefore, used to spread more than one batch of fluidizable paste. In fact, disposable means that it must be possible to manufacture the pastry bag in large quantities at a very low cost. Surface structure here means the three-dimensional structure of the surface. The surface structure of the pastry bag reduces the risk of slipping of the grip by the user, especially if the user's hand, which may be wearing a glove, is moistened or muddy with, for example, oil or grease. However, it is possible to provide a piping bag that is easy to hold without the addition of any agent that increases friction. Even if friction enhancing agent has been added, a surface structure can be advantageous because it creates a space between the polymer tube or piping sleeving layers, said space eliminating or reducing the risk of the layers adhering to each other , which would make management more difficult. According to a second aspect, a preform is provided for manufacturing at least two disposable piping sleeves, each comprising a container of polymer film. The preform is characterized in that it consists of an elongated thin-walled polymer tube, the pastry sleeves being detachable from each other by means of separation marks., and because an outward facing surface of the thin-walled polymer tube is provided with a surface structure. According to a third aspect, there is provided a method for manufacturing a disposable pastry bag, comprising a container of polymer film. The method comprises forming the pastry bag essentially from a thin-walled polymer tube, and providing an outward facing surface of the thin-walled polymer tube with a surface structure.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic perspective view of a pastry bag. Figure 2 is a schematic plan view of the pastry bag of Figure 1. Figure 3 is a perspective view illustrating the step of rolling a polymer tube to form the pastry bag in Figure 1. Figure 4 is a plan view of a preform for forming the pastry bag in figure 1. Figure 5 illustrates a first example of a surface structure. Figure 6 illustrates a second example of a surface structure. Figure 7 illustrates a third example of a surface structure. Figure 8 illustrates a fourth example of a surface structure.

DESCRIPTION OF THE PREFERRED MODALITIES Figure 1 shows a pastry bag 1, which in a supply hole 5 is provided with a nozzle 2 and that through a surface end 4 has been filled with a fluidizable paste 3. The fluidizable paste 3 is supplied through the nozzle 2 when the open end 4 of the pastry bag 1 is closed, for example folded, and the pastry bag 1 compressed. With reference to Figure 2, the pastry bag 1 is formed from a segment of polymer tubing, preferably made of polyolefin plastic, such as polyethylene, polypropylene or the like. When it is not full, as shown in Figure 2, the pastry bag 1 has an essentially two-dimensional extension, its shape being defined by parallel folds at the edges 9, 10, formed by the polymer tube being crushed, and a union 7 which is obliquely transverse to the edges 9, 10. A separation mark 8 runs parallel to the joint 7, said mark 8 being achieved in an obvious way for one skilled in the art, for example by means of perforations. At the open end 4 of the pastry bag 1, a separation mark 11 extends perpendicularly to the edges 9, 10. At the open end, a weaker solder joint (not shown) can be provided, which is such that when detaching along the separation mark 11, the pastry bag remains closed until a user deliberately opens it. In accordance with one embodiment, this weakest weld joint can be achieved at a low temperature and under mechanical pressure. To allow delivery by means of the pastry bag 1, it is cut on the cutting line K, whereby a hole 5 of a desired size is obtained. In the hole, the nozzle 2 can be applied or, alternatively, the pastry bag can be used without a nozzle. Figure 3 shows how a polymer tube 21 for making piping sleeves is crushed as it travels through rollers 20 to form an essentially two-dimensional elongated preform 22 with double layers. The person skilled in the art is familiar with the formation of a polymer tube through film blowing. Figure 4 shows how the double-layer preform 22 has been provided with oblique weld joints 7 and separation marks 8, 11 for the purpose of defining the pastry sleeves 31, 31 '. The pastry bag can be essentially transparent, that is to say transparent, to such an extent that its content is visible through the limiting surfaces of the pastry bag. According to one embodiment, the pastry bag can be inked. An outward facing surface of the pastry bag 1 is provided with a surface structure, which improves the grip, that is, its roughness increases the friction between the user's hand and the pastry bag. Figure 5 illustrates a first example of a surface structure that increases clamping, which can be achieved by adding grains and / or flakes to the polymer pulp before the film blow is carried out to form the polymer tube , or in connection with it. It will be appreciated that grains and / or flakes may also be applied to the surface of the plastic tube after the tube 21 or the preform 22 is formed. The grains or flakes may be, for example, of a plastic material having density and / or melting point higher than the material from which the polymer tube is formed. For example, the polymer tube can be made of low density polyethylene (PE-LD), the grains or flakes being made of high density polyethylene (PE-HD) or polypropylene. In accordance with other embodiments, the grains or flakes may consist of sawdust, fine sand, lime and / or solid or hollow glass microspheres. Another way to achieve a surface similar to that shown in figure 5 is to apply a lacquer to the outside of the pastry bag, said lacquer being provided with a surface structure forming additive, for example additives of the type described above. Figure 6 illustrates a second example of a grip-enhancing surface structure, which can be achieved by passing the polymer tube 21, for example as shown in Figure 3, through an embossed roller, if necessary under heat influence, which allows the polymer tube to be provided with, for example, a granulated (Figure 6) or grooved (not shown) structure. According to one embodiment, the polymer tube can be made from at least two layers of laminated polymer material. A polymer tube of this type can have a plurality of layers having different functions, for example an internal layer designed to facilitate the feeding of fluidizable paste and prevent said paste from adhering to the internal walls of the pastry bag and designed to facilitate the introduction of nozzle 2; a gas tight layer, a support layer and / or an outer grip enhancer layer. It is obvious to a person skilled in the art how to obtain a laminated polymer tube by simultaneous extrusion and film blowing of inner and outer layers. Another way of the prior art to obtain a laminated plastic film is to join two layers of film using, for example, an adhesive and / or heating. The above methods of providing a grip-enhancing surface structure can be used in both single layer piping sleeves and rolled piping sleeves. The surface structure described with reference to Figure 5 is highly suitable for laminated piping sleeves, since it is sufficient to add grains or flakes to the material forming the outer layer of the polymer tube. Figure 7 illustrates a further example of a grip enhancing surface structure, which can be achieved by adding a blowing agent to the material of which an outer layer of a rolled polymer tube is formed. The person skilled in the art is familiar with the expansion technique. Upon exposure, after film blowing, the polymer tube 21 is made to heat the blowing agent to release a gas, bubbles forming on the outer surface of the polymer tube, said bubbles burst, thus creating a rough surface whose structure can The non-limiting examples of blowing agents are bicarbonate, azo-dicarbonate-amide and water. Another example of the grip enhancing surface structure is shown in FIG. 8 and can be achieved by means of underfeeding. Underfeeding can be done using pure plastic or with a filler additive, such as silicates, clay, carbonates, small glass spheres, fine sand, etc., which is added to the material from which an outer layer of the polymer tube is formed. The person skilled in the art is familiar with the underfeeding procedure. The extrusion apparatus for feeding the outer layer material is submerged, which results in a surface structure similar to that of FIG. 7 obtained. In this case, the concentration and friction of the filler can be varied to obtain the desired surface roughness.

A further example of a grip-enhancing surface structure similar to those shown in Figure 7 or Figure 8 can be achieved by means of cold feed, wherein the outer layer is under-fed and the extruder is operated at a lower temperature than normal. In this case, no filler is needed. The person skilled in the art is familiar with cold feeding techniques. The ways of achieving a previously described grip enhancing surface structure can also be combined with the addition of known friction enhancing agents, for example high viscous molecular weight liquids such as polyisobutylene and / or glycerol esters. According to one embodiment, the surface structure described with reference to Figure 5 is combined with the surface structure described with reference to Figure 7 or Figure 8. This embodiment can also be combined with the surface structure described with reference to figure 6, and / or a friction enhancing agent. According to another embodiment, the surface structure described with reference to Figure 7 or Figure 8 is combined with the surface structure described with reference to Figure 6. This embodiment can possibly be combined with a friction enhancing agent.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - A disposable pastry bag (1), comprising a container of polymer film, characterized in that the pastry bag is essentially made of a thin-walled polymer tube, and an outward-facing surface of the pastry bag is provided with a structure of rough surface.

2. A pastry bag (1), according to claim 1, further characterized in that the rough surface structure is formed by at least one of: a) adding grains or flakes to the material from which the polymer tube is made thin wall, b) passing the polymer tube through a pattern roller, and c) applying a lacquer to the outward facing surface combined with the addition of grains or flakes to the lacquer.

3. A pastry bag (1) according to claim 1 or 2, further characterized in that the outward facing surface of the polymer tube comprises friction-increasing agents.

4. A pastry bag (1) according to any of the preceding claims, further characterized in that the thin-walled polymer tube is made of a plastic film, preferably made of polyolefin plastic.

5. - A pastry bag (1) according to any of the preceding claims, further characterized in that the thin-walled polymer tube is essentially transparent.

6. A pastry bag (1) according to any of the preceding claims, further characterized in that a wall of thin-walled polymer tube consists of at least two layers of laminated material, a layer of external material of which is provided with the surface structure.

7. A pastry bag (1) according to claim 6, further characterized in that the rough surface structure is formed by at least one of: c) expanding at least partially a layer of external material, d) underfeeding by at least partially the layer of external material, and e) at least partially cold-feed the layer of external material.

8. A pastry bag (1) according to any of the preceding claims, further characterized in that the thin-walled polymer tube has a separation mark (8) that is transverse to the longitudinal direction of one of the tube.

9. A pastry bag (1) according to claim 8, further characterized in that the thin-walled tube has a union (7), preferably a solder joint, which is parallel to the separation mark (8).

10. A preform (30) for manufacturing at least two disposable piping sleeves (1, 31, 31 '), each comprising a container of polymer film, characterized in that the preform consists of an elongated thin-walled polymer tube. (21, 22), the pastry sleeves (1, 31, 31 ') being peelable from one another by means of a separation mark (8), and an outward facing surface of the thin-walled polymer tube is provided with a rough surface structure. 11.- A method to make a disposable pastry bag (1) comprising a polymer film container, characterized by: making the pouch essentially from a thin-walled polymer tube and providing an outwardly oriented surface of the thin-walled polymer tube with a rough surface structure. 12. A method according to claim 11, further characterized in that the step of providing the surface facing outward with a rough surface structure comprises: adding grains or flakes to the material of which the thin-walled polymer tube is made, and / or passing the thin-walled polymer tube through a pattern ro

ll. 13. The method according to claim 11 or 12, further characterized in that it comprises forming the thin-walled polymer tube by laminating at least two layers of material, a layer of external material being provided with the rough surface structure. 14. The method according to claim 13, further characterized in that the step of providing the surface facing outward with a rough surface structure comprises: at least partially expanding the material from which a layer of the polymer tube is made thin wall, at least partially underfeeding the material from which an outer layer of the thin-walled polymer tube is made, and / or at least partially cold-feeding the material from which an outer layer of the wall polymer tube is made thin.