The present invention relates to an apparatus and process for the manufacture of a composite frozen product, wherein the product comprises a frozen confection enclosed within a casing.
Frozen confections are well liked by consumers and are often provided in cartons such as pint pots. Other food items such as pies, which have a filling encased within a crust, are also popular with consumers. Furthermore, consumers are increasingly attracted the non-baked crusts as exemplified by the bases of products such as cheesecakes. It is therefore highly desirable to be able to combine these elements together to provide a composite frozen product in which a frozen confection is encased with material such as that used in non-baked cheesecake-type bases. Examples of such materials include particles of biscuits, particles of cookies, particles of cakes, and so on.
However, it is extremely difficult to make crusts or casings from these materials because the particles are unstable and cannot be readily formed into a casing into which the frozen confection may then be introduced to form the composite frozen product. There is therefore a need for an apparatus and process that overcomes these disadvantages and that can be used to make such a composite frozen product.
We have now found that it is possible to create casings from material such as particles of biscuits, particles of cookies, particles of cakes, and the like, provided that a particular apparatus and/or process is employed.
Accordingly in a first aspect the invention provides an apparatus for the production of a composite frozen product in a container, the product being comprised of a frozen confection within an edible casing, wherein the apparatus comprises:
Preferably the container is a tub.
Preferably the container is a sleeve for a cone, preferably a pointed tipped cone, more preferably a round bottomed cone.
Preferably the means for removing material comprise a suction device. In an alternative embodiment the means for removing material comprise a screw extruder.
In a second aspect, the invention provides a process for the production of a composite frozen product in a container, the product being comprised of a frozen confection within an edible casing, the process comprising the steps of:
Preferably the container is a tub.
Preferably the container is a sleeve for a cone, preferably a pointed tipped cone, more preferably a round bottomed cone.
Preferably the edible casing comprises at least 50 wt %, preferably at least 70 wt %, more preferably at least 85 wt %, more preferably still at least 90 wt %, yet more preferably still 95 wt %, most preferably 97.5 wt % of particles of casing material. Preferably the particles of casing material have an average diameter of from 0.001 to 2.5 mm, preferably from 0.01 to 2 mm, more preferably from 0.05 to 1.5 mm, more preferably still from 0.1 to 1 mm
In a third aspect the invention provided a product obtained or obtainable by the process of the second aspect.
These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present invention may be utilised in any other aspect of the invention. The word “comprising” is intended to mean “including” but not necessarily “consisting of” or “composed of.” In other words, the listed steps or options need not be exhaustive.
It is noted that the examples given in the description below are intended to clarify the invention and are not intended to limit the invention to those examples per se. Similarly, all percentages are weight/weight percentages unless otherwise indicated. Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and/or use are to be understood as modified by the word “about”. Numerical ranges expressed in the format “from x to y” are understood to include x and y. When for a specific feature multiple preferred ranges are described in the format “from x to y”, it is understood that all ranges combining the different endpoints are also contemplated.
Frozen confection means a confection made by freezing a pasteurised mix of ingredients such as water, fat, sweetener, protein (normally milk proteins), and optionally other ingredients such as emulsifiers, stabilisers, colours and flavours. Frozen confections may be aerated. Frozen confections include ice cream, milk ice, water ice, frozen yoghurt and the like. They typically have an overrun of from 20 and 150%, preferably from 40 to 120%. The frozen confection may be ice cream, sherbet, sorbet, water ice or frozen yoghurt.
Typically, frozen confections are provided in containers such as tubs and pint pots. Such a container is shown in
As described above, it is desired to provide a product to the consumer that is characterised by a new and interesting casing material that will provide a new and improved product to the consumer. The casing material needs to be formed into a casing that will at least have a base and wall that correspond to the base and wall of the container that the product is formed, manufactured and distributed in. The casing may optionally have a top as described below. Into this casing will be dosed a frozen confection—i.e. the casing material will encase the frozen confection as described above. By encase, it is meant that frozen confection will be at least partially contained by the casing. The combination of the frozen confection within casing is referred to herein as the composite frozen product. These composite frozen products provide a unique product format that benefits from the desired organoleptic properties provided by the casing material used.
The casing material can be made from particles of, for example, a dry baked material. Dry baked material refers to a food product which is produced by baking a mix (dough) comprising flour and water, and optionally other ingredients such as sugars and fats/oils. Dry baked materials are typified by biscuits and have a moisture content of less than 5 wt %, e.g. about 2 wt % and a close-knit structure with little aeration. Water content can be measured using standard techniques such as drying a known volume and weight of a product in a drying oven and comparing the weight and volume before and after drying. A typical pre-mix for a dry baked material comprises 20-55%, preferably 25-40% flour, 5-50%, preferably 10 to 30% sugar, 1-20%, preferably 1-10% fat, 0-10%, preferably 2-7% egg and/or milk solids and 5-30%, preferably 10-30% water. Fats/oils that may be used include coconut oil, palm oil, palm kernel oil, cocoa butter, milk fat, sunflower oil, safflower oil, olive oil, linseed oil, soybean oil, rapeseed oil, and mixtures, fractions or hydrogenates thereof. Sugars that may be used include simple sugars such as sucrose, fructose, lactose, and dextrose; corn/glucose syrups and invert sugar. In addition, the dry baked material may contain other ingredients conventionally found in such products, such as starch, salt, flavours, colours (e.g. caramel), cocoa powder, inulin, emulsifiers (e.g. lecithin), stabilisers, preservatives and inclusions such as pieces of nuts, fruit and chocolate. Water is an important component of the mix because it allows the starch to gelatinize during baking and allows the mix to be blended but much, if not substantially all of the water is driven off during baking, so that the water content of the resulting dry baked material is at most 5 wt %. Hence the amounts of the other ingredients in the final dry baked products can be proportionately higher. Due to its formulation, structure and water content, dry baked material is frangible and prone to breakage and crumbling. Thus hard biscuits and cookies are suitable since they are normally baked for long enough such that they become crisp and dry and have a water content at most 5 wt %. In addition, particles of cakes, sponges, brownies, soft cookies and the like which are baked to be soft and moist in the centre also suitable for this invention.
The size of the particles of the casing material plays an important role. Particles that are too large are not suitable for use in the process of the invention. The particles of casing material therefore have an average diameter of at most 3 mm.
Preferably the particles of casing material have an average diameter of from 0.001 to 2.5 mm, preferably from 0.01 to 2 mm, more preferably from 0.05 to 1.5 mm, more preferably still from 0.1 to 1 mm. The particles may have heterogeneous shapes, sizes, volumes, surface areas and so on. Particles may be circular, non-circular or a mixture thereof. In some preferred embodiments, the particles are substantially spherical. As used herein, the term diameter refers to the maximum length of the particles in any dimension. For particles having an irregular shape, the diameter is the length of the longest cross section that can be cut through the body of the particle. When the diameter of particles is referred to it is meant that at least 90% by number of the particles have that diameter. The particles of the casing material may be obtained from larger pieces of casing material, for example by crushing or breaking.
The edible casing may contain at least 50 wt %, preferably at least 70 wt %, more preferably at least 85 wt %, more preferably still at least 90 wt %, yet more preferably still 9 5wt %, most preferably 97.5 wt % of particles of casing material. In a most preferred embodiment the edible casing is almost entirely formed from the particles of casing material.
In addition, the edible casing can also contain up to about 25% of a mixture of other particulate edible pieces such as seeds, cereals, fruit pieces, chocolate chips and the like. These have an average diameter from 1 to 3 mm, preferably from 1.5 to 2.0 mm.
As used herein, the term “binder” means a substance which can be used to stick pieces of casing material together. Binders are typically based on fats or viscous sugar solutions. Suitable fats include butter, coconut oil, palm oil, canola oil, soya bean oil, sunflower oil and olive oil. The edible casing may contain less than 15 wt % binder by weight of the casing, preferably less than 10 wt % of binder, more preferably less than 5 wt %, more preferably still less than 0.5 wt %, more preferably still at most 0.05 wt % binder. A certain amount of binder may be necessary to allow the edible casing to be formed such that it has the desired product characteristics and stability. Accordingly the edible casing may contain at least 0.01 wt % binder by weight, preferably at least 0.02 wt %. The casing material often inherently contains ingredients such as fats or sugars. However, these ingredients have been subjected to baking conditions and are integral to the structure of the dry baked material itself. As such, these ingredients are not available to function as binders in the sense of this invention and the level of additional binder is understood to not include any other similar material that is already present in the dry baked material.
In this particulate form, the casing material forms a mass that is relatively free flowing and is unable to retain a structure due to the movement and instability of the particles. Furthermore, these particles are not particularly malleable and cannot easily be shaped to form a casing. Although it may be relatively easy to form a base from the particles of the casing material, for examples as is done with cheesecake-type bases, it is very difficult to form them into more vertical structures such as the walls of the casing which is essential for the desired composite frozen product. However, the present invention has now found that if a particular apparatus is used then it is possible to make casings from this material.
The apparatus includes a forming element 2 such as that shown in
Preferably the rim surrounding the lower opening 5 of the forming element 2 is shaped to form a point such that in operation the shape of the rim directs crust material outwards towards the wall of the container as the forming element moves through the casing material as discussed below. For example, the inner surface of the lower opening may terminate lower than the outer surface to form a bevelled or chamfered edge. Alternatively, the rim or the lower opening tapers thereby to form a pointed rim around the opening.
The apparatus also includes means for removing excess coating material. This means can for example be a suction device or a screw extruder. The means for removing excess coating material are structured such that they can be introduced into passage 3 of the forming element 2. In one embodiment the means for removing excess CM are separate from the forming element. In another embodiment the means for removing excess CM may be integrated with the forming element.
The apparatus further includes filling means for adding frozen confection into the casing once made.
The apparatus may also optionally include a tamping element for tamping the base of the edible casing.
In a preferred embodiment the apparatus also includes a holder for the container. The holder corresponds to the shape of the container and serves to support the container during the formation of the edible casing and the production of the composite frozen product. A further advantage of such a support is that it also serves to provide a surface against which the pressure created by the forming element can be reciprocated which facilitates the formation of the edible casing.
The apparatus of the invention is used as follows. As shown in
This excess material in passage 3 is then extracted using the means for removing excess coating material. As described above, any suitable removal means may be employed such as a suction tube or the like. In a preferred embodiment the removal means is a screw extruder consisting of a central rotatable shaft around which helical flights are positioned. Such an extruder 8 is shown schematically in
As shown in
The forming element is then removed to leave a complete casing 10 that has been formed within the interior of the container as shown in
The present invention will now be further described with reference to the following non-limiting examples.
Digestive biscuits were ground and the resulting particles were separated into two size grades, the first having an average particle diameter of 250 um, the second having an average particle diameter of 4 mm. These biscuits were then mixed with coconut oil (which was used as a binder). The resulting samples contained 15 wt %, 25 wt % and 35 wt % of binder. A further sample contained no binder.
All samples were processed as follows: Containers were filled with samples of the biscuit particles and a forming element (as described above) was then introduced into the containers to compress the biscuit particles against the internal surface of the container. Excess biscuit particles were removed from the passage of the forming element, after which the forming element was removed. The resulting casings formed from the biscuit particles were then assessed, in particular the success of the apparatus and process in forming the walls of the casing were assessed, as was the stability of the walls. The stability was tested by deforming the container by squeezing by hand and the resilience of the walls to this abuse was determined.
It was found that it was possible to form stable casing from all the samples that employed biscuit particle with an average diameter of 250 um, even the sample that had no binder. In contrast, the biscuit particle samples with an average diameter of 4 mm did not form stable walls.
It can therefore be seen that the apparatus and process of the invention is capable of forming a casing for a composite frozen product where the particles are have an average diameter of less than 4 mm.
Pieces of sponge cake were broken up and the resulting particles were separated into two size grades, the first having an average particle diameter of about 3 mm, the second having an average particle diameter of from 8-9 mm. These particles were then mixed with coconut oil (which was used as a binder). The resulting samples contained 15 wt %, 25 wt % and 35 wt % of binder. A further sample contained no binder.
All samples were processed as described above. The resulting casings formed from the sponge particles was then assessed as described above.
It was found that it was possible to form stable casing from all the samples that employed sponge particles with an average diameter of about 3 mm. In contrast, the sponge particle samples with an average diameter of from 8-9 mm did not form stable walls.
These results further confirm the finding that the apparatus and process of the invention is capable of forming a casing for a composite frozen product where the particles are have an average diameter of less than 4 mm.
It should be understood that the specific forms of the invention herein illustrated and described are intended to be representative only, as certain changes may be made therein without departing from the clear teachings of the disclosure.
Number | Date | Country | Kind |
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12162959.6 | Apr 2012 | EP | regional |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2013/055034 | 3/12/2013 | WO | 00 |