阅读说明：本技术 用于将颗粒施加到冷冻甜食上的方法和装置 (Method and device for applying particles to a frozen confection ) 是由 T·A·V·阿门德 于 2020-09-24 设计创作，主要内容包括：本发明涉及一种用于装饰棒上的冷冻甜食的设备,该设备包括：用于将涂覆材料施加到冷冻甜食上的涂覆工位；用于将颗粒施加到涂覆的冷冻甜食上的颗粒分配工位；用于移动冷冻甜食经过涂覆工位和颗粒分配工位的传送机,该传送机包括夹持装置,该夹持装置被布置在传送机上并且具有用于夹持和释放冷冻甜食的棒的产品附着位置和打开位置,并且该传送机包括用于在竖直位置和水平位置之间移动夹持装置连同冷冻甜食的引导件。该设备还包括用于移除冷冻甜食的一侧上的涂覆材料的涂覆料移除装置,该涂覆料移除装置在传送机的移动方向上定位在涂覆工位之后,并且其中颗粒分配工位定位在涂覆料移除装置之后,并且其中夹持装置被布置成在经过颗粒分配工位时将冷冻甜食保持在水平位置。本发明还涉及一种利用该设备制造在棒上的经装饰的冷冻甜食的方法。(The present invention relates to an apparatus for decorating frozen confections on bars, comprising: a coating station for applying a coating material to the frozen confection; a particle dispensing station for applying particles onto the coated frozen confection; a conveyor for moving frozen confection through a coating station and a particle dispensing station, the conveyor comprising a gripping device arranged on the conveyor and having a product attachment position for gripping and releasing a stick of frozen confection and an open position, and the conveyor comprising a guide for moving the gripping device together with the frozen confection between a vertical position and a horizontal position. The apparatus further comprises a coating material removal device for removing coating material on one side of the frozen confection, the coating material removal device being positioned after the coating station in the direction of movement of the conveyor, and wherein the particle dispensing station is positioned after the coating material removal device, and wherein the clamping device is arranged to keep the frozen confection in a horizontal position while passing the particle dispensing station. The invention also relates to a method for manufacturing a decorated frozen confection on a stick using the apparatus.)

1. Apparatus for decorating a frozen confection (1) on a stick, the apparatus comprising:

-a coating station (4) for applying a coating material onto the frozen confection (1),

-a granule dispensing station (7) for applying granules onto the coated frozen confection,

-a conveyor (3) for moving the frozen confection through the coating station and the granule dispensing station,

the conveyor (3) comprising a gripping device (2) arranged on the conveyor (3) and having a product attachment position for gripping and releasing the stick of frozen confection (1) and an open position,

the conveyor (3) comprises guides for moving the gripping means together with the frozen confection between a vertical position and a horizontal position, and wherein the apparatus further comprises

-a coating material removal device (6) for removing coating material on one side of the frozen confection, the coating material removal device (6) being positioned after the coating station (4) in the direction of movement of the conveyor (3), and wherein the particle dispensing station (7) is positioned after the coating material removal device (6), and wherein the gripping device (2) is arranged to keep the frozen confection in the horizontal position while passing the particle dispensing station (7).

2. An apparatus according to claim 1, wherein the coating material removal means comprises an air flow means adapted to partially remove coating material from one side of the frozen confection.

3. The apparatus of claim 2, wherein the gas flow device is in the form of an air knife, a knife, and/or a curtain.

4. Apparatus according to claims 2 and 3, wherein the gas flow means are positioned such that, based on a top view of the strip, the gas flow direction of the gas flow means is perpendicular to the direction of movement of the products, or at an angle of maximum 60 degrees to either side of the conveyor movement, as measured from a position perpendicular to the direction of linear movement of the products.

5. Apparatus according to any of claims 2 to 4, wherein the air flow means is positioned such that the air flow is directed straight upwards in a vertical direction towards the underside of the products, or from a vertical position to either side of the products at an angle of preferably at most 45 degrees, more preferably at most 20 degrees, in a direction opposite to the conveyor movement of the products.

6. An apparatus according to any one of claims 2 to 5, wherein the apparatus comprises heating means for heating the gas flow from the coating material removal means (6).

7. Apparatus according to any one of the preceding claims, wherein the conveyor comprises gripping means arranged perpendicular to the direction of movement of the conveyor.

8. The apparatus of any of the preceding claims, wherein the coating material removal device positioned after the coating station is located at a position beside or below the conveyor.

9. The apparatus of any of the preceding claims, wherein the coating removal device comprises a mechanical doctor blade.

10. The apparatus according to any one of the preceding claims, wherein the granule dispensing station comprises a granule dispensing hopper (8).

11. An apparatus according to any one of the preceding claims, wherein the apparatus further comprises a particle supply system (10) for collecting particles that do not adhere to the frozen confectionery coating material and a conveyor for returning the collected particles to the dispensing station.

12. The apparatus according to any of the preceding claims, wherein the apparatus further comprises a coating line application device (9), preferably positioned after the particle dispenser in the direction of movement of the conveyor.

13. Method for manufacturing a decorated frozen confection (1) on a stick, the method comprising:

-providing a device according to claims 1 to 12,

-attaching the frozen confection (1) by the stick with the gripping means (2) on the conveyor (3),

-moving the frozen confection through the coating station while applying a coating material,

-bringing the frozen confection in a horizontal position,

-removing the liquid coating from one side of the frozen confection with the coating removal device (6),

-moving the frozen confection through the particle dispensing station (7) while adding particles to the upper surface of the frozen confection,

-cooling, and

-releasing the gripping means (2) and the decorated frozen confection (1).

14. The method of claim 13, wherein the coating is applied by dipping, spraying, or showering.

15. A method according to claims 13 and 14, wherein a coating line application device adds lines after the frozen confection has passed the pellet dispenser (7).

Technical Field

The present invention relates to an apparatus for decorating frozen confections on bars and a method for manufacturing the frozen confections.

Background

Coated frozen confections are products that are highly appreciated by consumers. The elegant and artistic appearance further enhances the enjoyment of the product beyond the contribution of ingredients and texture used.

Consumers prefer particularly handcrafted products, i.e. products with particles applied to ice cream sticks, to form personalised products with an aesthetic look. Such products can be prepared by a process in which a consumer or an ice cream store employee customizes the ice cream with a selected topping and dip. In this method, an uncoated ice cream bar is dipped into a liquid coating material. After coating, the particles are sprayed onto the coating material immediately while the coating material is still liquid. After a few seconds, the coating solidifies and the embedded particles become fixed in place. This ensures that the particles do not fall off when the product is consumed. The type of particles may be nuts, cookie pieces, rice crisps, fruits, petals, chocolate pieces, or any other edible particulate matter. The weight, size, and shape of the particles may vary. Furthermore, in many cases, a small amount of liquid acrylic is poured onto the product in the form of strands after the particles are added.

For this manual method, frozen confectionery bars made by extrusion and bars made by moulding can be used. However, bars made by extrusion methods are used more frequently due to generally better texture quality. There are ice cream shops selling such fresh coated products.

Unfortunately, there is no equivalent method in industrial ice cream manufacture that would reproduce this manual procedure.

Seika Foods (japan) used an alternative method of making frozen confectionery bars that exhibited some of the aforementioned characteristics of hand-decorated products. It involves filling a liquid or partially frozen dessert mix into a plastic tray having a finished shape. On top of this layer particles are added, possibly supplemented with sauces, fruit pieces and decorations. After final freezing, the product, including the tray, is wrapped in plastic bags for distribution and sale. Although this method allows a variety of particles to be added to one side of the product, these products, like the handmade molding described above, have no coating on the ice cream portions and therefore they do not fully reproduce the appearance of the handmade molding.

In the following description of the existing procedure for applying liquid coating material and particles onto ice cream bars, the challenge of reproducing hand-decor strips is explained: in industrial ice cream manufacture, frozen confectionery bars coated and comprising particles on the surface have long been known. In the manufacture of such products, two types of processes are commonly used. In The first method, a frozen confection bar is dipped into a liquid coating, where The particles are suspended (c.clark, The Science of ice Cream, RSC paper, 2005, page 94 f). Various particles, such as nuts, can be used. In this process, the particles need to remain suspended and uniformly distributed in the coating. During impregnation, the coating material and particles adhere to the surface of the frozen confection strip and are fixed as the coating material solidifies. It is important that the particles remain unreleased but still adhere to the surface of the product until the coating has cured. Thus, the choice of particles is limited to those that are not too heavy. Another characteristic of the method is that the particles are covered with the coating material so that details of their shape and colour are at least partially masked.

In a second method of applying particles, known as dry coating, the particles adhere to the surface of the coating material just after impregnation but before the coating material is cured. In this process, the frozen confection strip is first impregnated into a coating material, followed by spraying the particles onto the surface. In a typical dry coating process, the dip strip is lowered into equipment known as a dry coater. In this machine, rotating paddles throw dry particles onto The still tacky product surface (c. clark, The Science of ice Cream, RSC Paperback, 2005, page 98). Particles suitable for dry coating must be carefully selected because particles that are too heavy will fall off the vertical surface. Therefore, there is a limitation on the particles that can be attached.

Thus, both prior methods of adding particles to the strip have limitations in both the selection and visibility of the particles, which clearly distinguishes them from the hand-coated strips described above.

Therefore, there is a need for an industrial process for making frozen confections that provides the visual appearance of a hand-decorated product and does not have the inherent limitations of the industrial coating procedure described above.

Object of the Invention

It is an object of the present invention to provide an apparatus and a method for coating frozen confections to obtain an aesthetic appearance. Furthermore, it is an object of the present invention to minimize the waste of particles and coating material in the process.

Disclosure of Invention

In a first aspect, the invention relates to an apparatus for decorating frozen confections on bars, the apparatus comprising:

a coating station for applying a coating material onto the frozen confection,

a granule dispensing station for applying granules onto the coated frozen confection,

a conveyor for moving the frozen confection through the coating station and the pellet dispensing station,

the conveyor comprises a gripping device arranged on the conveyor and having a product attachment position for gripping and releasing sticks of frozen confection and an open position,

the conveyor comprises a guide for moving the gripping means together with the frozen confection between a vertical position and a horizontal position, and wherein the apparatus further comprises:

-a coating material removal device for removing coating material on one side of the frozen confection, the coating material removal device being positioned after the coating station in the direction of movement of the conveyor, and wherein the particle dispensing station is positioned after the coating material removal device, and wherein the gripping device is arranged to keep the frozen confection in a horizontal position while passing the particle dispensing station.

In a second aspect, the invention relates to a method for manufacturing a decorated frozen confection on a stick, the method comprising the steps of:

-providing a device according to claims 1 to 12,

-attaching the frozen confection by a stick using a gripping device on a conveyor,

moving the frozen confection through a coating station while applying a coating,

-bringing the frozen confection in a horizontal position,

-removing the liquid coating from one side of the frozen confection with a coating removal device,

-moving the frozen confection through a particle dispensing station while adding particles to the upper surface of the frozen confection,

-cooling, and

-releasing the gripping means and the decorated frozen confection.

The present invention overcomes the limitations of the existing processes for applying coatings and particles by providing a coating removal step that avoids the coating material from agglomerating the particles while allowing the particles to embed and/or adhere well to the coating.

The apparatus and method according to the invention allow to produce frozen confectionery products on an industrial production line comparable to hand-decorated frozen confectionery bars. In particular, the process of the present invention can be carried out on a standard Ice Cream extrusion line widely used in the industry to form extruded bars with a coating, as described for example in "h.d. goff and r.w. hartel-Ice Cream, seven Edition, Springer, 2013, page 277".

Drawings

Figure 1 shows the layout of an embodiment of the apparatus and method of the present invention for applying particles to one side of a frozen confection strip.

Figure 2a is a picture of a finished ice cream bar with a coating obtained with the apparatus and method of the invention, with granules applied on one side and gravy applied coating the bar.

Figure 2b shows a typical corrugation pattern on the coating material subjected to a blowing step by means of an air knife.

Figure 3 is a graph showing the change in coating weight and particle adhesion over time (in seconds) after dipping an ice cream stick.

Fig. 4 shows a comparison between particles that are well attached and embedded in the coating (left side) and particles that are loosely attached to the coating (right side).

Fig. 5 schematically shows the removal of excess coating material from the underside of the strip by means of an air knife.

Figure 6 shows a typical air knife.

Figure 7 shows the progressive removal of coating material from the underside of the coated strip by an air knife positioned beneath the strip. The strip passes from left to right over the air knife and the liquid coating is blown away. The arrows show the position of the air knife nozzle.

Detailed Description

The present invention relates to an apparatus for decorating frozen confections on bars. The apparatus comprises: a coating station for applying a coating material to the frozen confection, a particle dispensing station for applying particles to the coated frozen confection, and a conveyor for moving the frozen confection through the coating station and the particle dispensing station. The conveyor comprises a gripping device arranged on the conveyor and having a product attachment position for gripping and releasing sticks of frozen confection and an open position. The gripping device is preferably arranged perpendicular to the direction of movement of the conveyor. The conveyor comprises guides for moving the gripping means together with the frozen confection between a vertical position and a horizontal position: this allows for the movement of frozen confections into and out of the station. For example, the frozen confection may be stored vertically and moved into and out of the coating tank. The apparatus further comprises a coating material removal device for removing coating material from the underside of the frozen confection, the coating material removal device being positioned after the coating station. The position of the coating material removing device is preferably beside or below the conveyor in the moving direction of the conveyor. This has the effect that the amount of coating material dripping from the frozen confection and into the collection hopper of the particle supply system for the particles can be greatly reduced or eliminated. This means that agglomeration of the particles due to the coating material sticking the particles together can be avoided and the particles can be reused in the manufacturing process.

The coating station may be adapted to apply the coating by dipping, spraying or showering. In a preferred embodiment, the coating station is a dipping station.

The apparatus also has a particle dispensing station positioned above the conveyor and after the coating removal device. The holding means is arranged to hold the frozen confection in a horizontal position while passing through the pellet dispensing station. The guide is used to move the holder along with the product between a vertical position and a horizontal position. The effect of this is that the chips can be applied to the coated upper side of the frozen confection (with the dispenser above, only the upper side being sprayed with particles), while the coating is still soft enough that the particles will adhere to the coating. Preferably, the gripping means hold the frozen confection in a horizontal position as the conveyor passes the pellet dispensing station so that the pellets fall on the horizontal upper side of the frozen confection.

In the context of the present invention, the particles may be any kind of food particles or fragments thereof, such as nuts, cookie pieces, rice crisps, fruits, petals, chocolate pieces or any other edible particulate matter. The weight, size, and shape of the particles may vary. The invention is particularly useful for dosing larger particles such as whole nuts or berries. The size of the particles is preferably in the range of 2mm to 20mm, more preferably in the range of 5mm to 15mm, the size being the longest dimension of the particles. However, larger particles may also be applied.

In a preferred embodiment of the apparatus according to the invention, the coating material removal device provides a gas flow adapted to partially remove coating material that might otherwise drip from the frozen confection. Only the not yet solidified outer layer of the coating is removed from the frozen confection and preferably only from one side of the product.

It has been found that the coating removal device greatly reduces or eliminates coating dripping into the particle supply system and the resulting particle agglomeration. The coating removal device may consist of one or more air knives or other nozzle arrangements that produce air curtains suitable for removing liquid coating. Another coating material removal device may be a mechanical blade arranged such that the frozen confection passes over the mechanical blade in a manner to remove the liquid coating material without damaging the solidified part of the coating material and without damaging the frozen confection.

When using a gas flow to remove excess coating material, it is preferred to accommodate the splashing of coating material during the blowing by a shield surrounding the gas knife. Further, it is preferable to heat the protection mask and/or blow the nozzle to prevent the coating material from accumulating thereon.

Preferably and based on a top view of the strip, the air knives, knives and/or curtain formed by the slit nozzle or row of nozzle holes are positioned perpendicular to the direction of movement of the conveyor of the product or at an angle of maximum 60 degrees to either side of the conveyor movement as measured from a position perpendicular to the direction of movement of the product.

Preferably, the air flow means are positioned such that the air flow is directed straight upwards in a vertical direction towards the underside of the products, or in a direction opposite to the conveyor movement of the products at an angle of preferably at most 45 degrees, more preferably at most 20 degrees, from the vertical position to either side of the products.

Furthermore and when viewed from a horizontal view towards the end of the product, the air knives and/or air curtains formed by the slit nozzle or row of nozzle holes are positioned such that the air flow is directed straight upwards in the vertical direction towards the underside of the product or in the opposite direction to the conveyor movement of the product at an angle of preferably at most 45 degrees, more preferably at most 20 degrees, from the vertical position to either side.

Although it is preferred to apply the air flow when the product is in a horizontal position, it is also possible to apply the air flow when the product is in a vertical position. In this case, after immersion in the coating, the product is lowered to a vertical position where it is passed through a vertically oriented gas stream that removes the liquid coating. After this step, the product is again raised to the horizontal position for application of the granules.

Partially removing the coating from one side of the strip using air blowing may leave a pattern, similar to a fine ripple-like structure imprinted on the coating. If a doctor blade is used to remove excess chocolate, scratches extending perpendicular to the axis of the bar can be seen on the coating.

Advantageously, the air flow comes from an air nozzle or an air knife, which is positioned below the strip while being held in its horizontal position. The air flow preferably continuously blows off the coating material from the underside of the strip, while leaving the cured portion of the coating material on the underside of the strip.

The gas flow from the coating material removal device may be heated by a heating device. The advantage of such heating is to prevent coating material from accumulating on the air knife or air nozzle, as coating material dripping on the air knife or air nozzle will remain liquid and drip.

In one embodiment of the invention, the apparatus comprises a coating removal device in the form of a mechanical blade. The scraper partially removes the coating material from the underside and stops dripping at least temporarily. This is achieved by mounting it under the ice cream bar so that the liquid coating is scraped from the bar as the bar passes. Preferably, the mechanical scraper is a stationary bar or blade. Since the scraping scrapes a considerable amount of coating material off the strip, there is little or no residual dripping, and about 1 second after scraping, there is no dripping at all, and this period of time is available for applying the particles.

The granule dispensing station comprises a granule dispensing device and a granule dispensing hopper for dispensing granules onto the frozen confection. The dispensing device may be a vibratory doser or screw feeder or a cup feeder or any other device providing a constant flow of particles.

The apparatus may further comprise a particle supply system for collecting particles that do not adhere to the frozen confectionery coating material and a conveyor for returning the collected particles to the dispensing station. According to the present invention, the collected particles can be reused in the manufacturing process. A particle supply system, for example comprising a hopper, is mounted below the outlet of the particle dispenser and below the product path.

The apparatus may also include means for collecting removed or dripping coating material. For example, a drip tray for collecting removed or dripping coating material may be used.

Furthermore, the apparatus may comprise a coating line application device, which is preferably positioned after the particle distributor in the direction of movement of the conveyor. The line application means provides the product with a decorative line which, in addition to having a decorative effect, can also help to immobilize the particles.

In a preferred embodiment of the apparatus according to the invention, the apparatus further comprises a coating line application device to apply a decorative coating line, typically used for the handmade product theme of the invention, on top of the particles on the strip.

The coating line application device is preferably positioned after the particle dispenser in the direction of movement of the conveyor. These lines are applied after spraying the particles and while the bars are still in the horizontal position. The coated strands preferably have a diameter of 1mm to 5mm thick. Application devices for applying threads to horizontally positioned products are well known and the principle is described in e.g. US 3824950.

The beneficial effects of coating the strands are primarily their decorative elements, but they also help to secure the loose particles to the strands.

Drawings

The invention will now be further described, by way of example only, with reference to the accompanying drawings.

The method of forming the frozen confection starts with providing an uncoated bar into which a stick of wood is inserted. First, the frozen confection is extruded from the freezer through a nozzle. During this step, a stick is inserted and then a piece of frozen confection is cut off using a hot wire. The frozen confection pieces fall onto a conveyor belt which travels through a hardening tunnel to freeze the frozen confection. At the outlet of the channel, the hard frozen products are picked up from the conveyor belt with bars by grippers that hold the hard frozen products.

For the subsequent steps of the process of the present invention, preferably a single pass extrusion line may be used. This is a widely used production line for making ice cream.

In a schematic diagram, fig. 1 shows the apparatus and the method according to the invention, looking forward from this point on a single-pass extrusion line. On this line, the holders (2) on which the uncoated frozen confectionery bars (1) are suspended are fixed along an endless conveyor chain (3) that continuously conveys the product to the subsequent process steps.

The frozen confectionery product suspended vertically from the holder is conveyed towards a coating dip tank (4). To enter the coating dip tank, a guide rod mounted below the gripper pushes the gripper (2) upwards to a horizontal or near horizontal position. Once raised above the edge of the dipping tank, the gripper is lowered to completely submerge the strip (1) into the coating. The gripper (2) is then pushed vertically upwards again to leave the impregnation tank (4).

In the standard industry process, the strip is then lowered back to the vertical position and excess coating material drips or runs off the coated strip. The dripping may last from about 10 to 30 seconds until the coating material is cured. It is known that the drop time depends on various factors, the most important of which are the coating composition and temperature and the frozen confection temperature.

In the method subject matter of the invention, the strip is held in a horizontal position after impregnation by means of a support bar holding a gripper. At this point, there is still excess coating dripping from the coated confectionery bar (5). To stop dripping, a blowing nozzle (6) placed under the product removes the uncured part of the coating from the underside. Immediately after the blowing nozzle, the particle distributor (7) sprays the particles supplied by the particle distribution hopper (8) onto the strip. Particles that do not fall onto the product are collected by a particle collection hopper (10) as part of the particle supply system and returned to the particle distribution hopper (8) by suitable conveying means known in the industry.

In the next step, the product passes under a coating line applicator (9) which provides a series of about 3 to 20 lines of coating material on the layer of particles.

The product is then held in the horizontal position for an additional about 1 to 10 seconds, then lowered to the vertical position, and finally conveyed to the packaging station.

Fig. 2a shows the final bar, showing the coating, particles and coating lines.

Fig. 2 b.

Figure 3 shows the action of an air knife blowing off a portion of the coating material from the underside of the coating strip. The strip moves from left to right past the air knife.

Examples

Example 1-dripping of coating materials at various times after immersion

Column 1 of table 1 shows the progress of dropping the coating from the bar held in a horizontal position after the coating step. An extruded ice cream bar weighing 56g was coated with chocolate coating. The coating had a fat content of 48% and the fat composition was 50% cocoa butter and 50% coconut oil. The coating has a temperature of 41 degrees celsius. The ice cream has a temperature of-25 degrees celsius. The strip was dipped in the coating for 1 second and then removed and brought to a horizontal position. The weight of coating remaining on the strip at various times was recorded.

TABLE 1

Last drop of

Just after dipping, the weight of the coating on the bar was 31g before significant dripping occurred. In the next few seconds, the weight of the coating material decreases as a portion thereof drops. During the first 2 to 3 seconds, the dripping was the greatest and then diminished. After 9.2 seconds, the last drop dropped.

In order to reduce the dripping of the coating material into the particle supply system, it is preferable to apply the particles to the strip after the dripping is stopped after 9.2 seconds, but before the coating material on the upper side is solidified.

Therefore, curing (and especially the adhesion properties of the particles on the strip) is of concern. Good adhesion is important to prevent particles from falling out during the packaging step and during product handling in the distribution chain.

Example 2 adhesion characteristics at different times

Table 2 describes the attachment of particles applied on the upper side of the strip at different times. In particular, it describes the adhesion characteristics of a spherical rice cracker covered with a fat-based coating and having a diameter of 5mm, which is sprayed by a vibrating dispenser from a height of 10cm onto a horizontal bar at different times after lifting the bar out of the dipping tank.

All particles sprayed 4 seconds after the strip was taken out of the dip tank were partially immersed into the coating material to the same depth. After a waiting time of 5 minutes after application, the particles were not easily removed when rubbed by hand on the particles. The pellets were still resistant to rubbing against the hand 6 seconds after the bar was removed from the dip tank and sprayed. However, the particles located on the strand near the edge of the inserted wood stick are clearly not immersed deep enough into the coating material than the particles in the middle of the strand and near the ends of the strand. The particles still did not fall off when rubbed by hand on the strip.

TABLE 2

After 9 seconds of spraying, some particles in the area of the strip located beside the stick easily fall off when rubbed on the product. They are hardly immersed in the coating material.

Table 2 shows two adhesion parameters at different times after removal of the product from the impregnation tank.

After 14 seconds, more particles easily fall off during rubbing. After 24 seconds, the particles near the rod did not adhere to the coating at all, and all other particles were easily detached upon rubbing. It was found that the particles should preferably be sprayed before 9 seconds after removing the product from the impregnation tank in order to have a good adhesion to the strip.

Examples 1 and 2 show that there is no suitable time in the process to allow good adhesion and minimal or no dripping of coating material into the particle collection hopper.

Figure 4 is a graph showing the difference between particles sprayed at different times after dipping an ice cream bar. Different levels of embedment are clearly visible. The figure shows a comparison between weak and strong attachment of particles. The particles sprayed 5 seconds after the impregnation on the left side are well embedded in the coating, while the particles sprayed 14 seconds after the right side rest loosely on the surface and fall off when rubbed.

It was found that this method was feasible by applying the particles between 8 and 9 seconds after the strip was removed from the impregnation tank. Under such conditions, dripping into the particle collection hopper and the resulting agglomerates remain acceptable for production purposes.

Example 3 adhesion characteristics and drop reduction when using air knife

This embodiment shown in table 3 shows a preferred position of the air knife in the assembly according to the invention resulting in a suitable reduction of dripping and particle adhesion.

The air knife (0.15mm nozzle gap width, directed vertically upward, oriented at 90 degrees to the direction of product flow, 15mm from the product surface, and operating at 20 psi) was located at 3 locations different from the point of strip removal from the dip tank.

The wire is moved at a speed of 240 mm/sec.

The amount of dripping of the coating material after the air knife until curing was recorded. When the air knife was positioned to act on the strip for 1.9 seconds after the strip was removed from the immersion tank, a significantly greater amount of dripping was observed forward from this point compared to the 2.7 second and 3.7 second positions. Furthermore, only a small difference between 2.7 seconds and 3.7 seconds was found. Therefore, the preferred position of the air knife is 2.7 seconds or later.

TABLE 3

As mentioned, it was observed that after the blowing step there was a period of time during which the dripping was completely stopped and then resumed until curing.

This effect is shown in column 2 of table 1. After the immersion tank, the strip passed through an air knife 2.7 seconds after leaving the immersion tank. Removal of the coating by the air knife results in a sudden drop in the weight of the coating adhering to the strip. Furthermore, it is important that there is no weight change for at least 1.4 seconds. A small number of drops then reappeared until the last drop fell at 18.1 seconds.

It was found that the time period just after the blowing step of 2.7 seconds, when no dripping occurred for at least 1.4 seconds, was very suitable for applying the particles. Since there are no drips during this time window, there will be no agglomerates in the particle collection hopper of the particle supply system when the particles are within this time window. The dripping that occurs after this period of time occurs outside the particle collection hopper and has no negative effect.

These cases are summarized in fig. 3, which graphically shows the coating weight and particle adhesion over time (in seconds) after dipping the ice cream bar. The upper curve shows a sudden drop in the weight of the coating due to the blowing off step, resulting in a "time window" without dripping. The lower curve shows the particle adhesion over time, indicating that the adhesion characteristics of the coating are well suited for applying particles during this time window. The time window is highlighted as a grey area.

Figure 5 shows schematically how air blown from the air knife blows off liquid from the underside of the strip moving from left to right. This is further illustrated in fig. 7. The drip strip moving from left to right (top left) approaches the air knife. Once the air contacts the product, the liquid coating is pushed to the left, leaving a clean surface, free of droplets, but with a wavy pattern (top right and bottom left and bottom right).

Thus, the blowing step can greatly reduce or eliminate the dripping of the coating material into the collection hopper of the particle supply system and the resulting agglomeration of the particles, while making it possible for the particles to adhere well to the coating material.

Example 4 description of product manufacturing test

Extruded ice cream bars weighing 56g and having an overrun of 40% were produced on a single pass extrusion line. The bars were moved along the conveyor chain at a speed of 240 mm/sec and dipped into a coating of 48% fat content, 50% of which was cocoa butter and 50% of which was coconut oil. The coating temperature was 41 degrees celsius and the immersion time was 1 second. 2.7 seconds after removal of the strip from the dip tank, the strip passed through an air knife. The air knife is positioned below the product path, pointing vertically upward, at a 90 degree angle relative to the direction of product movement. The air knife had a nozzle gap of 0.15mm and was operated at 20 psi. The distance of the air knife to the underside of the product was 15 mm. One second after the product passed the air knife, a layer of particles was sprayed onto the strip from a height of 10 cm. The granules consist of spherical rice crumbs with a fat-based coating.

Two seconds after the application of the particles, the product passed under the coating line applicator, which applied a raised coating line. The product was held in the horizontal position for an additional 7 seconds and then lowered to the vertical position. The product is then transferred to a packaging machine for packaging.

The resulting product consisted of the following elements and had the visual appearance of a hand-made product.

The frozen confectionery product consists of:

the upper side of the finished product is shown in fig. 2 a. Figure 2b shows the underside of a product that has been subjected to air knife treatment. This step forms a corrugated pattern on the coating material.

It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. Accordingly, such changes and modifications are intended to be covered by the appended claims.