Food or edible material: processes – compositions – and products – Processes – Molding – casting – or shaping
Patent
1996-01-02
1998-04-28
Yeung, George
Food or edible material: processes, compositions, and products
Processes
Molding, casting, or shaping
118 15, 425 90, 425106, 426302, A21C 1100, A23P 100
Patent
active
057441855
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device for extruding foodstuffs, in which the foodstuff can be coated with additives such as colorants or the like. The device has an extruder screw for feeding the material to be extruded which is extruded through a die and is subsequently cut off by means of a cutting device.
BACKGROUND OF THE INVENTION
Extruded foodstuffs which emerge from the extrusion die as a stick with a specific contour are widespread. After it emerges from the die, the extrudate is cut off to the desired length by means of a cutting device and is subsequently packaged and put on the market, for example as a snack. Such a device for extruding foodstuffs is known, for example, from U.S. Pat. No. 4,240,779.
If the foodstuffs consisting of expanding doughs, which are often used for producing so-called snacks, are extruded by means of the extrusion machine, the pressure difference at the die, which is caused by the heating of the dough and the water vapour incorporated in the dough, causes a strong expansion of the cut-off extrudate strip.
The snacks or extrudate strips may be coated with additives to affect their taste or to make their appearance more attractive by the application of colour.
Various processes are known for coating the extrudates, for example the extrudates can be dipped in liquids or be processed with rolls which apply the corresponding additives. In this case, an extremely wide variety of patterned rolls may be used for colour application, which apply various patterns to the snack. In the process, however, corresponding patterned rolls have to be produced for the desired coating, which naturally cannot be used for other patterns or designs. In addition, this type of coating requires a complicated additional operation.
Of course, it is also possible to add additives such as colorants to the material to be extruded, so that extrudates with an extremely wide variety of colours can be produced. In this case the colorants can also be added in the region of the extrusion die, as a result of which colour strips and marbling effects are produced. A selective and only localized coating of the snacks, for example to produce an animal's eye, is not possible with this process.
SUMMARY OF THE INVENTION
The object of the invention is to provide a process for the extrusion and coating of foodstuffs with which extrudates can be coated with additives in a simple mariner, furthermore a device for carrying out the process is to be provided.
The object is achieved by the features of Process Claim 1 and the features of Device Claim 11.
With the process according to the application, the extrudates can be coated with an additive, for example a colorant, during the extrusion in a simple manner without an additional production step.
This process for coating the extrudates can be combined with a process for influencing the shape of the extrudates to allow the extrudates to be shaped in a varied manner. In this process for influencing the shape, the extrudate is fissured at specific points before it is cut off. By means of this process, it is possible, for example, with the use of expanding doughs to produce animal figures with legs and ears which are very popular, particularly among children, since the expansion behaviour of the dough can be very greatly influenced by means of the applied fissures.
The spraying-on is preferably carried out not continuously but rather intermittently, an adaptation of the frequency to the extrusion rate or else to the cutting frequency of the cutting device providing the advantage that the additive is only sprayed onto the extruded parts at the desired points.
To control the spray device, a photoelectric cell may be used which registers the cutting-off of the extrudate by the cutting device. However, a timing generator may be used to obtain a synchronization of the spray device with the extrusion of the material.
The spraying-on of the additive is advantageously interrupted when the cutting device severs the extrudate, to prevent a soiling of the cutting
REFERENCES:
patent: 4309450 (1982-01-01), Seibert
Dishong George W.
Shaaf Technologie GmbH
Yeung George
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