Patent Application
20150125579
1. Field of the Invention
The invention relates to a method for packaging ready meals in at least one bowl featuring a circumferential rim, into which the basic ingredients of the ready meal are placed. The invention also concerns a device for packaging ready meals in at least one bowl with circumferential rim, consisting of a sealing tool for completely sealing a cover foil to the circumferential rim of the bowl.
2. Brief Discussion of the Related Art
With the method for ready meals known from prior art, the basic ingredients are processed inside the bowl. For this purpose, the bowl containing the ingredients is transferred for preparation in open form. In this way, attention can be paid to the special consistencies of the separate ingredients and a selective way of preparation is possible.
After preparation, e.g. by heating, the open bowl will be sealed, which has the disadvantage that the heated and thus partially pasteurised ingredients will be exposed to a foil introduced from outside that may carry germs and impurities.
Suggestions have already been made in prior art for the basic ingredients to be sealed in the bowl prior to processing, i.e. to seal the bowl completely with cover foil. During subsequent heating of the ingredients, these are cooked, e.g. by steam generated in a microwave oven. However, the result is that in the case of a menu with several different types of basic ingredients all the components are subjected to identical heat energy. The cooking requirements of separate ingredients cannot be taken into account.
With this familiar generic method, the work is done as in a steam cooker on a single level. Vegetables and salmon are, for instance, subjected to the same temperature for the same cooking time, with the result that, due to the longer cooking needed for salmon, the vegetables are usually overcooked.
The object of the invention is to develop a method of the type mentioned in the beginning that facilitates a high-quality preparation of ready meals whilst simultaneously reducing the exposure to germs. Furthermore, a device for packaging is to be presented, preferably for accomplishing said method.
With regard to the method, the said object is achieved with the invention by sealing a cover foil to the circumferential rim of the bowl so that there are at least two unsealed sections along the rim, with the meal subsequently being prepared in the bowl and thereafter the foil is completely sealed to the circumferential rim in a second sealing process.
The invention-based method facilitates selective processing of the basic ingredients similar to the open-bowl method. The various ingredients can each be subjected to different cooking energies; excess heat can escape from the bowl, as the cover foil is not fully sealed to the circumferential rim of the bowl. At least two unsealed rim sections are left.
The cover foil is consequently no hindrance to a qualitative processing of the ingredients. On the other hand, a cover foil is in place while the ingredients are cooking, so that the application of heat leads to a substantial sterilisation of the cover foil. When the basic ingredients are fully cooked, the invention provides for the bowl to be completely sealed in a second sealing process using the same foil. No new foil is introduced to the bowl at this point; instead the already partially sealed foil in place during the heating process is now fully attached to the circumferential rim, so that the package is completely sealed.
A further development of the invention-based method provides that, prior to the second sealing of the cover foil, free ends of gas hoses are placed close to the unsealed rim sections. This allows e.g. for the bowl to be filled with protective gas via said conduits. A vacuum may also be applied to said gas hoses to extract air from the bowl. The oxygen content of the exhausted gas can be measured, e.g. when air is to be replaced by a protective gas such as nitrogen.
The ready meal may be prepared, as in the state of the art, by microwaves; the cover foil will be sterilised by the heat generated in the process.
A predefined quantity of cold-filtered air or gas can be pressed into the bowl via a gas line. Another gas line will simultaneously siphon off the atmosphere from the bowl. The feed hose can then be closed and atmosphere can be extracted from the bowl until the oxygen content approximates 0%. A pre-determinable vacuum is thus drawn with the exchange of air; alternatively, a pre-determinable quantity of nitrogen can be introduced. This may also suck in the cover foil.
The device intended for achieving the objective is distinguished by the fact that the existing sealing tool or a second sealing tool is designated to seal the cover foil to the circumferential rim only partially.
The invention-based device is a state of the art sealing tool that can be used for fully sealing a cover foil to the circumferential rim of the bowl. According to the invention, said sealing tool or, if necessary, a second sealing tool is provided to facilitate partial sealing of the cover foil along the rim. This method makes available the unsealed rim sections intended by the invention, and gases may be introduced or extracted through these sections.
The sealing tool for partial sealing may for example reconstruct the circumferential rim of the bowl incompletely so that at least two sections of the circumferential rim have no equivalent section on the sealing tool to cover them. During subsequent complete sealing, all the parts of the circumferential rim have corresponding parts of the sealing tool assigned.
Gas hoses can be assigned to the unsealed sections of the circumferential rim, with the free ends of said hoses facing the unsealed sections. One gas hose may feature an oxygen content sensor.
One exemplary embodiment of the invention that gives rise to further characteristics of the invention is represented in the drawings. They show the following:
With the invention-based method for packaging ready meals, the basic ingredients, e.g. potatoes, vegetables or meat, are placed in a bowl 1. Said bowl 1 has a bowl base and bowl sides, the latter featuring a circumferential rim 2 around the top edge.
After the ingredients inside bowl 1 have been fully processed, a second sealing process causes the cover foil 3 to be completely sealed to the circumferential rim 2. Sections 5 are re-sealed but this does not affect their function. The previously unsealed sections of the circumferential rim 2 are sealed for the first time with the cover foil 3, which can then be trimmed along the edge of the circumferential rim 2.
All the features mentioned in the afore-going description and in the claims can be combined in any desired way with the characteristics of the independent claim. The disclosure of the invention is therefore not restricted to the combination of the characteristics described and claimed, instead any sensible combination of characteristics within the scope of the invention are to be regarded as disclosed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2013 018 629.3 | Nov 2013 | DE | national |
