EP1288139B1

EP1288139B1 - Package for packing food products and method of packing food products

Info

Publication number: EP1288139B1
Application number: EP01119757A
Authority: EP
Inventors: Ron Exner; Olav Dagestad; Cyril Mace
Original assignee: Kraft Foods R&D Inc Deutschland
Current assignee: Kraft Foods R&D Inc Deutschland
Priority date: 2001-08-28
Filing date: 2001-08-28
Publication date: 2007-07-25
Anticipated expiration: 2021-08-28
Also published as: ES2565128T3; PT1288139E; DE60129555T2; SI1288139T1; DK1288139T3; ES2290076T3; DE20122333U1; CY1107731T1; DE60129555D1; ATE367980T1; EP1288139A1; EP1602594B1; EP1602594A1

Abstract

The package comprises a rectangular sheet of flat, foldable packing material (10) with central body portion (14) for enclosing the surfaces of the block-shaped food product (12), a frame-shaped sealing portion (16) for sealing the package and comprising a front (17), a rear (18) and two side portions (19) and flap portion (20,21) adjacent the side portions (19). After the package is folded around the food product (12) the inner surface of one of the side portions (19) of the sealing portion (16) abuts to the inner surface of the other one of the side portions (19) of the sealing (16) and a seal being formed by adhesive along the front (17), rear (18) and the side portions (19) of the sealing portion (16). After sealing, the inner and outer surfaces of the flap portion (20,21) are accessible, one of the flap portions being wider that the other flap portion.

Description

Technical field

The present invention relates to packaging, and more particularly is directed to an improved package according to the preamble of claim 1 for packaging food products, for example chocolate bars. Further, the present invention is directed to a method of packaging such food products.
Often, a wrapper which is suitable for packaging food products, such as chocolate bars, is fabricated from a material which is substantially gas and moisture impervious, in order to maintain the article at a desired level of freshness. Further, the packaging is intended to provide customer information, for example the content of the packaging, its origin or other information. Additionally, the wrapping has to provide a pleasing appearance of the product.
Further, it is an essential requirement of such wrappings, in particular for snack articles such as chocolate bars, that these packages can be opened easily. However, there is often difficultly in opening the package due to the strength of the wrapper material and its resistance to tearing. In particular, there is a requirement that the package can be opened without the aid of an additional tool such as scissors or a knife.

Prior art

Block-shaped products, in particular food products being used as snacks, are often wrapped in a sheet of flat, foldable packing material. Usually, this sheet is generally rectangular. Such a sheet comprises an inner surface and an outer surface, whereby the inner surface is the surface directed to the food product to be packed. Subsequently, an adhesive is applied to the inner surface of the sheet-shaped packing material to a frame-shaped portion surrounding the central portion onto which the block-shaped food product is laid. Alternatively, it is possible to provide an inner surface of the packing material which comprises a pressure sealable and re-sealable wax-like coating composition. For example, self-adhesive thermoplastic materials can be used which stick to each other upon application of moderate pressure.
Subsequently, the sheet material is folded around the block-shaped food product such that the block-shaped food product becomes wrapped and the inner surfaces of two opposite portions of the frame-shaped sealing portion contact. In this condition the seals are formed around the sealing portion. As the sealing portion is frame-shaped and extends from the central body portion of the sheet material onto which the food product is laid to all outer edges of the sheet-shaped packing material, the seals are formed on the very outer edges of the package. Accordingly, it is difficult for a user to open the package without the aid of additional tools such as scissors or knives. Accordingly, such packages are often provided with incisions or perforations enhancing the convenient opening of the package. Such additional elements are provided at specified locations of the package.
To overcome this problem, US 3,291,377 discloses a conveniently openable package for enclosing a perishable comestible. In particular, this package comprises a rectangular blank in the form of a generally rectangular sheet of a packing material. This blank includes a central body portion onto which a food product to be packed is laid. Additionally, the blank comprises flaps on opposed longitudinal sides of the central portion. When a block-shaped product is to be packed, the blank is folded around the product such that wings of the blank provided at opposite sides of the product abut one another in face to face relationship. Subsequently, the flaps which are attached to the extremities of the rings are folded inwardly of the wrapper along fold lines and are sealed thereto. The package itself is sealed such that the folded flaps which form tabs remain freely accessible. In particular, the package is closed along the abutting wings and front and end seal areas. Even though this kind of package provides a better access to the food product by simply applying a tensional force manually to the tabs, its manufacture is rather complicated.
US 2 968 396 refers to a packaging of two flat articles. A fold of the packaging material is formed between the two products. A fin seal and two end seals are formed, wherein the fin seal is formed at a middle portion of one of the two flaps enclosing the products.
US 2 998 880 discloses a package for a surgical instrument. As the surgical instrument is enclosed by two superposed layers which are combined to form an envelope by sealing zones embracing the surgical instrument. The upper end of the package does not comprise a sealing zone such that two flaps are formed which may be cripped by the user. One of the flap portions is wider than the other one of the flap portions.
US 5 945 145 which forms the preamble of claim 1 refers to a package for packing slices of cheese having a top wall, a bottom wall, a pair of side walls and a side of end walls.
The package is formed from a continuous wrap of package material. Opposite marginal edge portions of the package material are brought together and sealed to one another to form a fin seal. This fin seal is a resealable, peelable seal.

Summary of the Invention

It is an idea of the present invention to avoid a complicated folding of the flapped portions as required by the package disclosed in US 3, 291, 377 .
It is an object of the present invention to provide a package which is conveniently openable and easy to manufacture for packing generally block-shaped food products. Further, it is an object of the present invention to provide a method of packing a block-shaped food product.
These objects are solved by a package having the characterizing features according to claim 1 and a method according to claim 6.
It is to be noted that the expression "top", "bottom", "side", "front" and "rear" and the like, denote the direction of the sheet-like packing material when this is conveyed within a packaging machine. Obviously, these directions are considered presently the most convenient ones for packaging a food product. However, the invention is not limited to these directions. On the contrary, these are intended to simplify the description of the present invention.
The opening of a package for a block-shaped food product is simplified by providing flap-shaped tabs along one of the sealings, namely a sealing which runs over the backside of a package. Accordingly, the package can be opened by simply applying a manual force and pulling the tabs or flap-shaped tabs away from each other such the crease formed by the seal running over the back surface of the package is opened.
The seal is formed by adhesive applied to the inner surfaces of the sheet in the sealing portion. By applying adhesive, a peelable adhesive, the sealant can be applied precisely only to those portions of the sheet-like material which are to form the seal.
Additionally, pattern is embossed in these portions to enhance the closing strength of the package. This may be achieved by applying a pressure when producing the seal.
Preferred embodiments are characterized by the remaining claims.
The package according to the present invention is suited for use to wrap a product having a decorative upper face and a bottom face, in particular confectionary which has at least one decorative surface. The food product can be placed on the sheet material such that upon closing the package the decorative upper face of the food product is directed towards the seal which is formed by the side portion of the sealing portion and which usually runs in a centre portion of the upper surface of the product. Accordingly, a user immediately recognises the decorative pattern or the embossed information of the food product when opening the package.
According to a preferred embodiment these flap portions are provided along the edges of the sheet-like packaging material which are parallel to the feeding direction in a packing machine. This enhances the workability when packing a block-shaped food product.
In particular, it has to be noted that by the expression "block-shaped food product" a parallelepepid, a prism or similar shapes are addressed, as long as the food product is provided as one block to be packed.
For example, such a food product is a chocolate bar.
According to a preferred embodiment the sealed side portions of the sealing portion together with the at least one adjacent flap portion are folded around a fold line formed at the border of the central body portion to one of the side portions. This may be done before or after sealing. This means that the package remains flat and, accordingly, very suited for transportation or storage.

Brief description of the figures

In the following one preferred embodiment of the invention is described by way a non-limiting example in combination with the enclosed drawings, in which:

Fig. 1: shows schematically a product which is placed on a film wrapper according to one embodiment of the present invention;
Fig. 2: illustrates an opened package in which a front face of a food product is directed towards the consumer; and
Fig. 3: illustrates an opened pack in which a rear face of the food product is directed towards the consumer.

Best way for carrying out the invention

The best way for carrying out the invention is a package according to claim 1 and a method according to claim 6.
Fig. 1 shows schematically a generally rectangular sheet of a flat, foldable packing material 10 which is conveyed in the direction of the arrow A in a packaging machine. The sheet of foldable packing material comprises an inner surface (visible surface in Fig. 1) and an outer surface. Further, the sheet comprises a central body portion for enclosing the top, bottom, side, front rear surfaces of a block-shaped food product 12 which is illustrated in Fig. 1 as a chocolate bar. This central body portion is denoted in Fig. 1 with reference number 14.
Further, a frame-shaped sealing portion 16 surrounds the central body portion. The sealing portion 16 is coated with an adhesive on the inner surface of the sheet material 10 or is formed from a thermoplastic material, for example, so that the seals can be formed under temperatures and pressures which initiate a sticking of the coating to itself.
Considering the feeding direction of the packing material in a packing machine, the sealing portion comprises a front portion 17, a rear portion 18 and two side portions 19.
The front portion 17 and the rear portion 18 of the sealing portion 16 are arranged such that they extend to the edge of the generally rectangular sheet of the flat foldable packing material 10. The side portions 19 are located between the central body portion 14 and two flap portions 20, 21. The flap portions 20, 21 extend the entire length of the side portions of the sealing portion and form the lateral outer end portion of the sheet of packing material.
As can be seen from Fig. 1, the flap portion 20 is wider than the flap portion 21.
The foldable material can be formed from any suitable material, which is in particular suited for packing food products. In particular, requirements regarding gas and moisture imperviousness, pleasing appearance, robustness, printability etc., can be taken into account.
In the following, the method of packing a food product 12 using a package 10 shown in Fig. 1 is described.
The food product 12, for example a chocolate bar as shown in Fig. 1, is placed on the folding material such that the food product 12 contacts the inner surface of the sheet. As can be seen in Fig. 1, the food product 12 is preferably placed onto the sheet such that its decorative surface, for example a surface comprising embossing, product information or grooves for breaking the food product, is directed upwards. The food product 12 can be placed within the central body portion of the packing material according to the respective requirements. In particular, if it is required that the sealing line formed by the side portions 19 of the sealing portion is located in a central portion of the food product 12, the food product 12 has to be placed centrally and symmetrically within the central body portion and the sealing portion. It has to be noted that this does not necessarily mean that the food product 12 is placed symmetrically within the entire surface of the sheet of packing material. This is due to the effect that the flap portions 20, 21 may have different widths.
Subsequently, the sheet material is folded around the food product 12 such that the inner surfaces (i.e. the visible surfaces in Fig. 1) of the side portions 19 of the sealing portion 16 contact. This means that the inner surfaces of the flap portion 20, 21 are also directed to each other. Subsequently, a seal is formed, for example by applying pressure, only within the sealing portions such that the side portions 19 contact each other and such that the front portion 17 of the sealing portion 16 is folded back to itself as well as the rear portion 18 of the sealing portion is folded back to itself. Accordingly, the inner surface of the front portion 17 and the inner surface of the rear portion 18 contact themselves.
Subsequently, the overlapping portions 19 and 20, 21 of the packing material may be folded back onto the central body portion, for example around the border of the central body portion 14 to the right-hand side portion 19 of the sealing portion or around the border of the central portion 14 to the left-hand side side portion 19 of the sealing portion. This means that the outer surfaces of the respective side portion 19 and the adjacent flap portion contact the outer surface of the central body portion.
Accordingly, a finished package is obtained which is shown in Figs. 2 and 3. It is to be noted that the flap portions 20, 21 are only laid loosely above one another such that the inner surface as well as the outer surface thereof remains accessible.
Accordingly, a user wishing to open the package may grip one or preferably both of the flap portions 20, 21 and pull them away from each other such that the package is opened as shown in Figs. 2 and 3.
Depending on the orientation of the food products 12, the decorative surface of the food product 12 of the bottom surface of the food product 12 is directed to the consumer when opening the package as shown in Figs. 2 and 3, wherein in Fig. 2 the decorative surface is directed to the consumer and in Fig. 3 the bottom surface. If the food product 12 is, for example, prism-shaped, it is of course possible that two decorative surfaces are directed upwards.
If the bottom surface is intended to be directed towards the consumer when opening the package, the food product 12 has to be placed upside down on the packing material with respect to the situation shown in Fig. 1.
Accordingly, the present invention provides a package for packing generally block-shaped food products which is convenient to open and easy to manufacture. In particular, there are no additional folding steps required.

Claims

Package for packing generally block-shaped food products (12), the package comprising a generally rectangular sheet of a flat, foldable packing material (10) having an inner and an outer surface, the sheet comprising a central body portion (14) for enclosing the top, bottom, side, front and rear surfaces of the block-shaped food product (12), a frame-shaped sealing portion (16) enclosing the body portion (14) for sealing the package and comprising a front (17), a rear (18) and two side portions (19), and two flap portions (20, 21), one of the flap portions (20) being adjacent one side portion (19) of the sealing portion and the other flap portion (20) being adjacent the other one of the side portions (19) of the sealing portion (16), wherein the package is folded around the food product (12), such that the body portion (14) encloses the food product (12) with the inner surface of the sheet (10) directed to the food product (12), the inner surface of one of the side portions (19) of the sealing portion (16) abuts to the inner surface of the other one of the side portions (19) of the sealing portion (16), and a seal being formed along the front (17), rear (18) and the side portions (19) of the sealing portion (16), respectively, wherein the inner surface of the flap portion (20, 21) and the outer surface of the flap portion (20, 21) are accessible, one of the flap portions (20) is wider than the other one of the flap portions (21), the flap portions (20, 21) are folded such that the wider flap portion (20) is located on top of the narrower flap portion (21) and the seal is formed by means of adhesive applied on the inner surfaces of the sheet (10) in the sealing portion (16),
characterized in that
the seal is additionally formed by embossing a pattern in the sealing portion (16) of the sheet and in that both flap portions (20, 21) are free of adhesive and in that the adhesive applied to the sealing portion (16) is peelable.
Package according to claim 1, characterized in that it contains a generally block-shaped food product.
Use of a package according to claim 1 or 2 for packing a product (12) having a decorative upper face and a bottom face.
Use according to claim 3, characterized in that the decorative upper face of the food product is directed towards the seal being formed by the side portions (19) of the sealing portion (16).
Use according to claim 3 or 4, characterized in that the food product (12) is a chocolate bar.
Method of packing a block-shaped food product by means of a package according to any of claims 1 to 2, comprising the steps of:
a) placing the food product on the inner surface of the sheet in the central body portion;

b) folding the sheet around the food product, such that the food product is enclosed by the sheet and the side portions of the sealing portion abut each other with their inner surfaces;

c) sealing the package along the sealing portions, the seal being formed by embossing a pattern in the sealing portions of the sheet; and

d) folding the flap portions (20, 21) such that wider flap portion (20) is located on top of the narrower falp portion (21).
Method according to claim 6, further comprising the step of folding the abutting side portions of the sealing portion together with the at least one adjacent flap portion around a fold line formed at the border of the central body portion to one of the side portions.
Method according to claim 6 or 7, characterized in that the food product is placed on the central body portion such that an upper, decorative surface of the product is upwards and the sheet is folded such that the seal formed by the side portions of the sealing portion is adjacent the decorative surface of the product.
Method according to any one of claims 6 to 8, characterized in that the flap portions are parallel to the feeding direction of the sheet in a packaging machine.