Stackable plastic canning device made from a semi-finished plastic container and its use

Abstract

The present invention provides an advantageous container configuration, both in terms of the stable design of a plastic canning container for stacking purposes and in terms of good volumetric yield, i.e., advantageous packaging dimensions, for example, during transport on pallets or in containers. The top and bottom sections of the containers are geometrically corresponding to each other and feature interlocking contours, in particular, a positive fit via a preferably cylindrical axial section of the closure opening and a preferably conical radial section in the top and bottom regions. This also addresses process-related aspects in the production of the containers.Individual container components are taken into account, in particular in that a (separation) plane can also be used as a closure opening for the preservation-oriented sealing of the container with a metal lid. At the same time, the forming process of creating the container from a plastic blank remains comparatively streamlined.

Description

TECHNICAL FIELD

[0001] The present invention relates to a preferably square, stackable plastic canning device made from at least one semi-finished plastic container for preserving food. The present invention also relates to the use of a transport logistics unit for spatially arranging a plurality of such plastic canning devices in as close a spatial arrangement as possible. Last but not least, the present invention relates to the use of a metallic lid for the force-fitting / positive sealing of a container formed from the semi-finished container to provide such a preservatively sealed, stackable plastic canning device. In particular, the invention relates to a device and uses according to the preamble of the respective independent claim. BACKGROUND OF THE INVENTION

[0002] For many years, metal cans have proven to be practical for canned goods, especially for food. The advantages they offer, such as robustness, protection from light, exceptionally long shelf life, and particularly good sealing, are so obvious that it seems obvious to look for alternatives.

[0003] According to the current state of the art, a can is usually closed with a lid, on which an irreversible opening mechanism (which destroys the hermetic seal of the interior volume) allows access to the desired product or food. This concept has become equally popular for beverages and food.

[0004] A particular advantage of these well-known conventional cans is that they are comparatively robust and can withstand high loads, for example when they are handled in large quantities or masses for logistical purposes (e.g. during shipping, e.g. when stored in containers).

[0005] Nevertheless, there are some disadvantages associated with the metal base material of cans that may prompt a search for alternative materials. For example, the product or food itself cannot be kept visible; buyers must be content with trusting a label that may be present on the can.

[0006] However, particularly in the case of particularly high-quality or sought-after products such as vegetable products, it may be necessary for the product or food to remain visible as such, in particular in order to make differences in quality visible.

[0007] Alternatively, glass could immediately be considered as a material; however, glass is comparatively heavy and, not least, not particularly robust.

[0008] Aside from the aspects related to storage and presentation of food products, the material cycle, including manufacturing, logistics / shipping, disposal, or reuse, must also be considered in the overall context. While glass and metal are likely to be advantageous in this regard, their inherent weight and material costs are also a significant disadvantage, especially for relatively large canned goods.

[0009] Based on this, there is interest in an alternative design for preserving containers made of a material other than metal, particularly with regard to improving or facilitating the appeal to potential customers of the product / food. Last but not least, there is also interest in an alternative design for such well-known cans, particularly with regard to logistical aspects. SUMMARY OF THE INVENTION

[0010] The task is to devise a concept for providing a canned food container made of plastic that can be produced as efficiently as possible using materials, in particular for food, for example in the form of vegetable products. On the basis of this concept, a plastic container that is as stable as possible and also suitable or optimizable for large volumes can be provided for the preservation of food, such as vegetables pickled in oil, which can also be used advantageously in warehousing and for logistical tasks. The task is also to provide such a preserving container, in particular for food, by means of which as many logistical requirements as possible can be ensured, such as advantageous handling of large quantities of containers, in particular on the one hand with regard to a / the preservation and presentation function and on the other hand also with regard to logistical requirements such asLow weight, good preservative effect, robustness. It is also necessary to design or construct the preservative container in such a way that, on the one hand, its production and, on the other hand, its provision and use can be carried out in a particularly advantageous manner for both the manufacturer and (trading) partners along the logistics value chain, as well as for the user(s) or buyer.

[0011] This object is achieved by a stackable plastic canning device according to claim 1 and by uses according to the corresponding independent use claim. Advantageous developments of the invention are explained in the respective subclaims. The features of the exemplary embodiments described below can be combined with one another unless explicitly stated otherwise.

[0012] A plastic canning device is provided for preserving foodstuffs such as vegetables, nuts, fish, meat, in particular pickled / preserved in fluid, wherein the plastic canning device is made from a semi-finished container made of plastic for forming at least one container component with a closure opening of a container of the plastic canning device, wherein the plastic canning device comprises a metallic lid which is connected by means of a lid edge which is formed in a force-fitting / positive-locking manner over its entire circumference in the region of the closure opening to the container component made from the semi-finished container in such a way that the container is sealed in a preservative manner;According to the invention, the semi-finished container has a base body geometrically configured both in a head region and in a base section of the container such that, when stacking several containers on top of one another, the corresponding geometrically configured head regions and base sections engage positively, at least in the region of the closure opening. This provides good stability, space utilization, and scalability, particularly with the slimmest possible design of any transport / storage aids, such as cardboard boxes.

[0013] It should be understood that, on the one hand, the plastic-metal material combination enables an advantageous structural design of the container (particularly a slim design, including in the lid area) and also an advantageous manufacturing process. On the other hand, the stackable design, particularly due to the positive interlocking of the top and base sections, enables comparatively voluminous containers on the one hand, and on the other hand, allows for the handling of a comparatively large number of plastic canning devices in combination, e.g., on Euro pallets without additional packaging materials, in particular without the need for additional cardboard boxes. This also promotes a favorable compromise between material usage, net weight, volume yield, logistics costs, and CO2 footprint.

[0014] The plastic-metal material combination, among other things, facilitates a slim design of the closure opening area. Unlike a plastic threaded closure, no noticeable material reinforcements are required on the container; rather, the container wall can be designed to be almost uniformly thick across the entire container, which also simplifies the manufacturing process. Furthermore, no relative movement is required between the closure opening container rim and the lid, especially since the lid is intended to remain irreversibly connected to the container.

[0015] According to one embodiment, the semi-finished container defines an upwardly projecting shoulder in the container's head region and a correspondingly designed, upwardly offset shoulder in the container's base section. This provides comparatively good support with comparatively little structural intervention in the container's geometric or wall-thickness design.

[0016] According to one embodiment, the container semi-finished product defines a downwardly directed concave groove in the top region of the container and a correspondingly designed, downwardly convex bead in the bottom section of the container. This also provides particularly effective interlocking.

[0017] According to one embodiment, the semi-finished container defines the contours or sections (in particular shoulders, steps, grooves, bulges) that are geometrically corresponding to one another in the head region and the base region, each on a conical section of the container. This also promotes an advantageous form-fitting effect.

[0018] According to one embodiment, the positive stacking of multiple plastic canning devices is ensured, on the one hand, by a positive fit over a preferably cylindrical axial section of the closure opening of a respective plastic canning device, and, on the other hand, by a positive fit over a preferably conical radial section in the head or bottom region of a respective plastic canning device. This also facilitates numerical scaling in multiple spatial directions without compromising the stability and load-bearing capacity of the containers.

[0019] According to one embodiment, the container defines a storage volume of at least three liters, advantageously at least five liters. This makes the advantages mentioned here in connection with the containers described even more noticeable.

[0020] It has also been shown that such a semi-finished container made of plastic can be advantageously used to form container components of an advantageously stackable plastic canning device for preserving foodstuffs such as vegetables, nuts, fish, meat, in particular pickled / preserved in fluid, wherein the plastic canning device has an at least one-component container formed from the semi-finished container with a closure opening, which can advantageously be sealed by means of a metal lid that is molded on in a force-fitting / form-fitting manner; wherein at least one container component can be formed or provided by means of the semi-finished container, namely at least the container ora / the base body of the container, which is geometrically designed, particularly in the region of the closure opening, and can be combined with another container in such a way that a form-fitting stacking of several containers on top of one another can be ensured by interlocking the corresponding container components, at least in the region of the closure opening, namely either the stacked containers themselves or one / the container with another container component made from the semi-finished container. The geometric design of the basic container shape with regard to form-fitting coupling at the base and closure opening provides numerous advantages, also in connection with logistical requirements. The closure opening is advantageously circular, in particular with an at least approximately cylindrical section for form-fitting coupling with the base region of another container.

[0021] According to one embodiment, a positive coupling for stacking the containers is provided by means of the closure opening, which is geometrically designed at least approximately corresponding to a correspondingly negatively designed concentric base region of the container (negative mold), in particular with a height of approximately 10-20 mm, e.g., 16 mm. This promotes advantageous coupling in the region of the closure opening, in particular over a comparatively small height, especially for containers that are barely or not at all conical in the head region.

[0022] According to one embodiment, the outer contour of the closure opening is designed geometrically to correspond to a correspondingly negatively designed concentric base region of the container, in particular with a shape / dimensional deviation (play) of max. 1 mm in the width direction (diameter), in particular with an at least approximately cylindrical coupling section. This small play facilitates stacking, but is so small that the positive connection leads to high stability. It should be understood that this play (max. approx. 1 mm) is realized with a comparatively large coupling diameter in the range of 130 mm, for example, and is therefore less than 1%. The comparatively large coupling diameter also contributes to the stability of an arrangement of numerous stacked containers.

[0023] According to one embodiment, the size of the closure opening is comparatively large in relation to the maximum width of the container, in the range of 0.5 to 0.8, in particular approximately a factor of 0.7 (e.g., 135:190 mm). This also promotes high stability and enables the comparatively easy / quick insertion of foodstuffs such as prepared vegetables, such as so-called makdous (this requires a larger opening than, for example, for beverages / liquids / fluids).

[0024] Optionally, it can also be provided that at least two container components are formed or provided by means of the semi-finished container, which are geometrically coordinated with one another and can be combined with one another in such a way that the container can be designed and stiffened by at least one of the container components in such a way that a form-fitting stacking of several containers on top of one another is ensured by the interlocking of the container components. This enables an advantageous compromise between material usage, rigidity, dead weight, large-volume container design, and logistical optimization measures, particularly with regard to the best possible volume utilization.

[0025] It has been shown that the stackable design according to the invention is so stable that packaging such as a carton surrounding several containers can be omitted. In other words, the containers can be stacked, for example, on a pallet or in a container and handled logistically without additional packaging material, particularly with maximum volumetric utilization and an advantageous square cross-sectional geometry or basic shape of the containers. This saves additional weight, packaging material, costs, and handling effort.

[0026] According to the present disclosure, "stackable" is to be understood in particular as a positively overlapping engagement in the vertical direction, in this case a base region of a first container with a head region of a second container.

[0027] Whenever the term "region" is used in the present disclosure, this primarily refers to a surface area of ​​the container that also extends in the radial direction. Whenever the term "section" is used in the present disclosure, this primarily refers to a longitudinal section of the container, which may, for example, also be cylindrical or have parallel side walls, and thus does not necessarily have to have a variation in diameter. It should be understood that the container may have several conical regions or sections, on the one hand in the base region and in the head region, each for the purpose of stiffening the wall, and on the other hand also in the region of the closure opening or towards the container rim, whereby the latter may (but does not have to) merge into the conical head region. In this respect, a distinction is also made between the "section" of the container and the "head section" to be separated (separate container component).

[0028] The present invention offers great advantages, particularly in connection with logistical challenges in the (worldwide) provision of, for example, foodstuffs preserved in oil, e.g. so-called Makdous, which are transported around the globe by ship or aircraft in hundreds of tons per year: weight and space savings, stable storage, comparatively large volumes per container unit / device, comparatively little use of material.

[0029] Personified terms, unless formulated in the neuter here, can refer to all genders within the scope of this disclosure.

[0030] According to one embodiment, two container components are formed or provided by means of the semi-finished container, which are designed to be plugged into one another in the vertical direction of extension (vertical axis) of the upright container, to form a container that is stiffened, in particular, in the base region of a / the base body of the container. On the one hand, this favors a comparatively lean manufacturing process with comparatively little handling effort for individual components, and on the other hand, the manufacturing process itself can also be designed to be very lean. A design of the base region and the (to be separated) head section of the container that is largely geometrically congruent from a structural point of view enables, with a comparatively simple manufacturing process in a negative mold, in particular to overcome difficulties associated with locally desired relatively greater wall thicknesses for the purpose of stiffening.

[0031] It should be understood that this optional stiffening use of the additional container component, which can optionally also be scrap (particularly created with regard to certain standardized material blanks or their geometry or dimensions), on the one hand allows for highly sustainable material use, and on the other hand, especially in the case of containers with a conical head section, enables very stable support of several containers on top of one another, e.g., even four or more containers on top of one another, each with a volume of approximately 10-12 liters. In this respect, the disclosure presented here in connection with the keywords "base stiffening" or "doubling of wall thickness" can also be implemented by a person skilled in the art in a container-geometry-specific manner.

[0032] According to one embodiment, a first container component of the container semi-finished product forms or provides a base body of the container, wherein a second container component, in particular a container head section of the container semi-finished product, forms or provides a component that can be separated from the base body for a container base reinforcement. This enables local reinforcement of the container with minimal manufacturing effort, in particular in combination with forming the container or the container semi-finished product into a negative mold, without having to ensure complex process control or semi-finished product configuration for this forming process to achieve different wall thicknesses. For example, a cylindrical semi-finished product is used to create the container semi-finished product.

[0033] According to one embodiment, the container semi-finished product in a one-piece design can be divided into the (at least two) container components by separation, in particular by separation in a separation plane extending orthogonally to the intended longitudinal extent or vertical axis of the container. This also provides a comparatively streamlined process from the semi-finished product to the sealed plastic canning device, which can also be relatively easily optimized for mass production or high volumes. The closure opening or the container rim intended for coupling with the metallic lid can also be formed directly in the separation plane.

[0034] According to one embodiment, the container components each have a separating edge, in particular a cut edge, or are formed by separating, in particular cutting, from the semi-finished container. The separating edge forms the closure opening. This also promotes comparatively high dimensional accuracy, especially in the area of ​​the closure opening, which is to be sealed as tightly as possible by a lid / cover, and facilitates optimization of the optionally implemented wall thickness doubling using container sections of the same (negative) shape.

[0035] According to one embodiment, the semi-finished container can be produced by inflating (gas pressure-driven forming) a basic shape, for example a cylindrical one, particularly in an elastic state of the material, into a negative shape due to the corresponding forming temperature, for example with overpressure generated pneumatically, for example with a negative shape milled from solid, e.g. using an aluminum negative mold. This also enables particularly short cycle times with readily available process media (e.g. compressed air, e.g. in the single-digit bar overpressure range). Thermal exposure can also be provided, within a temperature range that the person skilled in the art can adapt to the properties of the selected plastic material. The desired forming temperature can also be applied, for example, by thermal radiation.

[0036] According to one embodiment, a / the first container component of the semi-finished container forms a / the base body with a rectangular, in particular square, cross-sectional geometry. This also allows for optimized volumetric yield, particularly with regard to storage and transport on pallets or in containers. For example, the semi-finished container or the container formed therefrom with a doubled base area defines a volume of 8, 10, or 12 liters.

[0037] According to one embodiment, a / the second container component, in particular a container head section of the container semi-finished product, forms (or is configured or provided for) a preferably conical container bottom reinforcement, which is geometrically configured to correspond to a base region of the base body that preferably tapers inwardly or upwardly. This also promotes self-centering of containers or plastic canning devices during manual or mechanical stacking.

[0038] According to one embodiment, a / the first container component of the semi-finished container forms a / the base body with a rectangular, in particular square or cubic, cross-sectional geometry, wherein a / the second container component, in particular a container head section of the semi-finished container, forms a conical container base reinforcement with a preferably cylindrical extension, which is geometrically configured to correspond to an inwardly conical base region of the base body with a preferably cylindrical blind hole region. This also promotes the advantageous compromise described here between high volumetric yield and positive mutual stabilization of stacked containers or plastic canning devices, wherein the cylindrical section (extension in combination with the blind hole region) can provide a centering plug-in connection.

[0039] According to one embodiment, the form-fitting stacking of several containers (i.e. with or without a molded-on lid) is ensured in that the container components engage with each other in a form-fitting, geometrically corresponding manner, in a stiffening manner, in particular in the manner of a plug-in connection with form-fitting self-centering, e.g. through conicity or through at least approximately congruent cylindrical sections. Last but not least, this also facilitates the handling of comparatively large volumes or masses, e.g. in the case of containers with an enclosed volume in the range of 10-15 liters, i.e. a mass in the range of 10kg, for example. The conicity promotes an exact coaxial alignment of stacked containers / devices relative to one another, which cannot usually be easily ensured, for example, with large metal cans.

[0040] According to one embodiment, the wall thickness of the container components is at least approximately equal, with the intended combination of the at least two container components in the thereby stripped reinforced section of the container resulting in an at least approximately doubled wall thickness or rigidity. This provides a comparatively large stiffening effect, which could not easily be exceeded even by alternatively different wall thickness sections in the container semi-finished product (to the extent that this is at all feasible in terms of process), so that the inventive measures described here also enable the stacking of a large number of comparatively voluminous containers / devices into stable towers, even comparatively heavy containers / devices, e.g., containers each holding at least five liters.

[0041] A design that is also advantageous from a logistical point of view is, for example, an at least approximately square container base (with radii in the corners) with dimensions of 19 x 19 cm, so that an arrangement of, for example, six containers next to each other (especially without additional packaging / cardboard) results in a storage width of approximately 115 cm. A design with dimensions of approximately 14 x 14 cm is also advantageously scalable.

[0042] Volumes in the range of 3 to 20 liters can advantageously be realized based on the design and shape of the container described here.

[0043] According to one embodiment, the container component intended for stiffening the base region of the container is designed to geometrically correspond to both the base region and a head region of the container. This not least promotes form-fitting stacking with good strength and stability, even across multiple levels or under comparatively large structural forces / loads.

[0044] It is worth mentioning that the cutting / separating process is by no means a trivial one. On the one hand, a clean cut edge is required, particularly with regard to container sealing, and on the other hand, the most efficient process possible and a high cycle rate are desired. It has been shown within the scope of the present invention that a tapered section is advantageously provided between the first and second container components (e.g., a tapered section with an at least approximately cylindrical contour and a somewhat smaller diameter than the container sections adjacent at the top and bottom), so that the second container component can be severed first in order to then create a second, cleanest possible separating edge for the closure opening. The tapered section can be returned to the process, in particular as annular scrap, in particular for the manufacture of semi-finished products intended for the production of the container semi-finished products.It is also worth mentioning that the tapered section advantageously has a comparatively thin wall thickness, in particular significantly less than 1 mm (also depending on the specific plastic material selected). This promotes a clean separating edge and a time-efficient process. The skilled person can design the process or the container semi-finished product either with or without a tapered section, in particular for the purpose of optimizing the separating edge or closure opening; however, the other advantages described here (especially stackability) are not further affected by this optional variation.

[0045] For example, a shutter opening with a diameter in the range of 100mm to 140mm is created, for example 126mm as standard.

[0046] Using the present invention, weight savings in the range of 25-30% can be easily achieved compared to glass or metal containers, thus resulting in significant savings in freight costs, emissions, and material costs. In other words: Using the present invention, for example, the foodstuffs described here can be transported more densely, with minimal space requirements, and, not least, with comparatively more secure support and with minimal use of packaging material. Last but not least, the inventive design of the containers / devices also facilitates, for example, visual inspection of the goods or cargo.

[0047] The aforementioned object can also be achieved by a stiffened plastic container configured for use with a / the stackable plastic canning device with a metallic lid described here, wherein the stiffened container is formed by nested container components of a semi-finished container according to the present disclosure, in particular by two geometrically corresponding, advantageously at least partially conical container components produced by separating the preferably one-piece semi-finished container. This allows the aforementioned advantages to be realized, particularly with regard to logistical requirements when handling large numbers of such containers, especially when they are comparatively large-volume (e.g., eight liters or more).

[0048] The aforementioned object is also achieved by a / the stackable plastic canning device described here comprising a plastic container and a metal lid, wherein the container is manufactured from or constructed from a semi-finished container according to the present disclosure, coupled, in particular plugged, to one of the container components in an arrangement that stiffens the container base area. This allows the aforementioned advantages to be realized, particularly with regard to an advantageous combination of logistical requirements with preservation requirements.

[0049] According to one embodiment, the container has a double-walled bottom region formed by a container head section (container component) of a / the container semi-finished product, in which the container head section is inserted into the base body of the container from below. This also enables a self-locking and self-stabilizing effect.

[0050] According to one embodiment, the metallic lid is integrally formed by a lid edge in a force-fitting / positive-locking manner around its entire circumference in the region of a closure opening of the container, wherein the closure opening is formed by a parting plane formed by separating one of the container components located in the container head section from the base body of the container. This also enables process-related synergies.

[0051] According to one embodiment, the lid edge is molded onto the container all the way around by radial-lateral pressing, in a force-fitting / positive fit, particularly both inside and outside of one or more of the container walls. This fitting or encircling can, not least, ensure high strength and dimensional stability of the entire container and also have a beneficial effect on the achievable sealing effect. Advantageously, the lid edge is molded or pressed onto the container edge, particularly starting from a U-shaped or L-shaped lid edge cross-sectional profile, particularly by a rolling movement along the circumference.

[0052] According to one embodiment, the container is designed to taper inwardly at least in one section toward the top of the container rim below the container rim. This provides advantageous stabilization, not least for containers with comparatively large diameters or transverse dimensions, and tends to keep the (circumferential) interface between the container and the lid as small / short as possible.

[0053] According to one embodiment, the lid edge is formed completely circumferentially on an upwardly tapering container edge, in particular on an at least approximately cylindrical (preferably vertical) upwardly tapering container edge. This provides a good seal and can also facilitate the joining process, particularly since a radial pressing force can be applied essentially in the radial-horizontal direction or orthogonally to a vertical axis of the container.

[0054] According to one embodiment, the container is conical in design, at least in one section upwards towards the container rim below the container rim, and otherwise at least in sections is e.g. cylindrical or rectangular. This also ensures good stability of the container. Advantageously, the conical region or section is provided as close as possible below the preferably cylindrical container rim. It should be understood that the present invention offers the advantage that the container opening can be made very large, e.g. with a diameter almost as large as the widest cross-sectional area of ​​the container. In other words: a / the conical region or section does not have to entail a particularly large variation in diameter, but can, for example, be used for a variation in diameter orprovide a narrowing or widening of only 0.5 to 1 cm, thus essentially being limited to the function of stiffening the container in the area of ​​the container opening. In particular in the case of very slim, thin (preferably cylindrical) containers, such conical stiffening may be completely unnecessary; this also depends somewhat on the wall thickness selected in each individual case and the material properties of the specifically selected plastic. In light of the present disclosure, a person skilled in the art can make a sensible specification regarding the requirement and size of such a conical stiffening height section. With regard to maximising the volume of the container, which is also advantageous from a logistical point of view, e.g. up to over 10 liters, the conicity proves to be very beneficial in terms of strength, in terms of the required use of material (orWall thickness) and also with regard to storage / transportability of such plastic canning containers, which naturally cannot be designed as rigidly as, for example, classic metallic cans or jars.

[0055] For example, the conical section ensures a diameter ratio of 1 to 1.3 between the maximum container diameter and the lid diameter. In other words, the lid diameter is slightly smaller than the container diameter in the cylindrical section, e.g., 10-15% smaller.

[0056] According to one embodiment, the container is designed to narrow conically inwards at least in one section upwards towards the container edge below the container edge.

[0057] According to one embodiment, the lid rim and container rim are rotationally symmetrical in cross-section, in particular circular. This provides a consistent quality and strength over the circumference and, not least, facilitates the manufacturing process, especially with cylindrical / circular cross-sectional geometries. Of course, the container rim is preferably circular, in particular because this considerably simplifies the molding process compared to non-circularly symmetrical geometries. However, other geometries are also feasible, e.g., elliptical geometries. The container cross-sectional geometry can deviate from this, e.g., be rectangular or square, in particular in conjunction with a conical region or section below the container rim that transitions the two geometries into one another.

[0058] According to one embodiment, the lid edge has a downwardly open U-shaped cross-sectional profile, which is geometrically configured to correspond to the container edge, for accommodating the container edge, particularly with minimal oversize, especially in the case of double-cylindrical U-legs (inner axial edge section and outer axial edge section). This allows the container edge to be gripped particularly well, and forming can essentially be achieved by a purely radial pressing force, which can facilitate the manufacturing process.

[0059] Optionally, the lid rim has an L-shaped cross-sectional profile that opens downwards and radially outwards. This profile is geometrically designed to correspond to the container rim, accommodating the container rim, particularly with minimal oversize, particularly with an axial inner rim section and a radial outer rim section. This allows for further variation, not least with regard to the design of the container rim geometry and any sealing elements. For the forming process, a force directed from top to bottom in conjunction with a radial pressing force must also be applied.

[0060] According to one embodiment, the force-fitting / positive molding in the area of ​​the metal-plastic material pairing ensures a seal for the container, which is designed for preservation over several months or years. This provides, not least, a very simple structure that can be implemented in a very pragmatic and process-efficient manner. In other words: The seal can already be ensured by the materials of the container and the lid, in particular without an additional sealing element. Optionally, an additional sealing material can be provided on the container edge, e.g., laid on or applied via surface technology, and / or an additional sealing material can be provided in the sealing profile of the lid, e.g., a ring-like sealing element that interacts with the container edge from above and / or laterally.

[0061] According to one embodiment, in addition to the sealing effect achieved by means of a force / form fit, at least one sealing element, particularly made of plastic or in the form of an elastomer, is provided on the metal-plastic material pairing in the lid edge. This can further improve the sealing effect, particularly depending on whether the molding is based essentially only on radial forces or also on forces directed from top to bottom.

[0062] It should be understood that gas-tightness is not necessarily required to ensure adequate preservation. Therefore, a sealing element can remain optional, depending, for example, on how gas-tight the interface needs to be and / or whether the food is to be preserved in a protective or inert gas atmosphere. Many foods can be preserved sufficiently long simply by embedding / soaking them in oil or a similar fluid.

[0063] It should be understood that the choice of material for a plastic suitable for the present invention cannot be limited a priori, but may be determined, for example, depending on the method of manufacturing the container's base body. Of course, a certain degree of UV resistance and / or a certain degree of tinting to reduce transparency may also be advantageous; however, these suggestions should not be construed as limiting, as it is generally known that long-term food storage requires a dark and, if possible, dry area.

[0064] According to one embodiment, the lid has an exclusively irreversibly operable opening / closing mechanism, in particular comprising a pull eyelet, by means of which the lid can be opened at a predetermined breaking point. This concept, also known from beverage cans, especially in combination with the plastic container described here, facilitates shelf life management and can even better ensure the freshness of the preserved food. The user can recognize, not least from the elasticity / dimensional stability of the container, whether the lid has already been opened or whether the seal is still fully intact.

[0065] According to one embodiment, the container rim over which the lid is folded is formed by a circumferential cutting edge or separation located at least approximately in a geometric plane, in particular, a horizontal plane as intended. This also enables a container configuration in which the container rim is formed by a cutting process, for example, starting from a volumetrically / geometrically predefined container base body, which can be scaled to the desired size at different height positions. This also allows, for example, customized small series to be realized in a very pragmatic and cost-effective way.

[0066] According to one embodiment, the container, apart from the container rim or the closure opening, has a rectangular, in particular square, cross-sectional geometry or basic shape. The cross-sectional geometry can be specified, for example, using a negative mold, and the corresponding negative mold can be individually designed with regard to purpose, size, or even, for example, transport route or value chain.

[0067] According to one embodiment, when properly molded to the container rim, especially in the case of a conical head section of the container, the lid has a radial extension that is at least 20%, preferably at least 30%, and more preferably at least 40% smaller than the maximum radial extension of the container's base body. This also promotes a comparatively large conical plug-in / stacking contact surface and can ensure even better mutual positive wedging of the containers. The difference in radial extension can be individually optimized depending on the volume, geometry, and desired lid size. For very large-volume containers, the difference in radial extension can even be greater than 50%.

[0068] The present invention is also related to a stackable plastic canning device for preserving foodstuffs such as vegetables, nuts, fish, meat, in particular pickled / preserved in fluid, in particular by means of a stackable plastic canning device according to the present disclosure, which is produced by separating a second container component from a first container component of a container semi-finished product made of plastic and thereby forming a closure opening on the first container component which is formed by means of a metallic lid and which can be sealable in a force-fitting / form-fitting manner, which closure opening closes the container orforms a / the base body of the container, which, particularly in the region of the closure opening, is geometrically designed and can be combined with another container in such a way that a form-fitting stacking of several containers on top of one another can be ensured by interlocking the corresponding container components at least in an at least approximately cylindrical section of the closure opening. This makes it possible to realize the aforementioned advantages.

[0069] Optionally, the production can also be carried out in the context of a base reinforcement, in particular in the case of a conical head section of the container, in that the production takes place by separating a second container component from a first container component of a semi-finished container made of plastic and thereby forming a closure opening on the first container component which can be sealed by means of a metal lid which is formed on it in a force-fitting / form-fitting manner, wherein the container components are designed to be geometrically coordinated with one another, in particular are designed to be conical at least in sections, such that when the second container component is inserted into a base region of the first container component, a stiffening double wall is produced for the form-fitting stacking of several containers on top of one another by form-fitting engagement at least in the region of the second container component.This makes it possible to realize the advantages mentioned above, particularly with regard to process aspects in the manufacture of the containers / devices.

[0070] The present invention is also related to the use of a negative mold for creating a container semi-finished product according to the present disclosure, wherein both a first container component forming the base body of the container and a second container component optionally providing a stiffening wall reinforcement are created by means of the negative mold, in particular from a single semi-finished product or plastic blank. This allows the aforementioned advantages to be realized, in particular with regard to process-related advantages in connection with the provision of the container components.

[0071] The aforementioned object is also achieved by using a transport logistics unit, in particular a Euro pallet, for the spatially most closely packed arrangement of a plurality of plastic canning devices according to the present disclosure, stacked one inside the other and optionally arranged laterally against one another, during transport or storage of the plastic canning devices. In other words: The plastic canning devices can be geometrically coordinated to correlate with a Euro pallet dimension or similar transport logistics unit (e.g., container) when numerically scaled in the width and / or length direction.

[0072] The present invention is also related to the use of a separation unit, in particular a cutting unit, comprising at least one separation tool, in particular a cutting tool, for producing at least two container components from a one-piece container semi-finished product according to the present disclosure, wherein a / the first container component forms the base body of the container, which, in the region of a closure opening created by separation, is configured to geometrically correspond to the base region of the container, so that several base bodies can be stacked one inside the other in a form-fitting manner. This allows the aforementioned advantages to be realized.

[0073] In this case, a / the second container component can optionally form a stiffening head section geometrically corresponding to both the base region of the container and a head region of the container. This allows the aforementioned advantages to be realized, particularly with regard to process synergies in the production of the containers or devices. The separation / cutting can advantageously be carried out with a static container by rotating the cutting unit or a cutting / separation tool of the cutting unit around the container. In other words: the cutting edge has a circular contour.

[0074] The present invention is also related to the use of a negative mold for creating a container semi-finished product according to the present disclosure, and the use of a separation unit for creating a first container component for the base body of the container and a second container component for providing a stiffening head section geometrically corresponding to the base region of the container as well as to the head region of the container, wherein a stiffened container is provided by means of the container components in each case to form a stackable plastic canning device that can be sealed / sealed for preservation by means of a metallic lid according to the present disclosure. This allows the aforementioned advantages to be realized, in particular with regard to an advantageous overall process for producing the preserving device.

[0075] Optionally, a stiffened container may be provided by means of the separated (second) container components to form a stackable and preservatively sealable / sealed plastic canning device according to the present disclosure.

[0076] It should be understood that the specialist can optimise the process steps in several places without having to make too much effort, for example with regard to adapting individual processes: Providing a cylindrical semi-finished product, for example, for producing the container semi-finished product; producing the container semi-finished product, in particular by gas-pressure-driven forming into a negative mold; dividing the container semi-finished product into at least two container components, in particular by separating a / the container head section; stiffening the base region of the container by means of at least one of the container components; molding the metallic lid, and thereby sealing the container.

[0077] This makes it possible to provide a relatively flexible process, for example, adaptable to a specific desired geometry, while retaining a relatively wide range of variation options. It should be understood that the person skilled in the art can independently optimize the design and sequence of the latter two steps, particularly depending on when or which food is to be filled, and / or when / how the devices are to be stacked.

[0078] The above-mentioned object is also achieved by using a lid edge of a metallic lid for the force-fitting / form-fitting molding of the lid in the region of an at least approximately cylindrical closure opening of a plastic container for providing a sealed and form-fitting stackable plastic canning device described here for preserving foodstuffs such asVegetables, nuts, fish, meat, in particular pickled / preserved in fluid, wherein the lid edge is preferably placed over the closure opening by means of two legs aligned at least approximately parallel to one another or is placed on the container edge by means of an L-shaped cross-sectional profile open downwards and radially outwards, and is then connected to the container edge in a force-fitting / form-fitting manner by molding the lid edge profile, wherein the container is formed from a semi-finished container, wherein the container is form-fittingly stackable, in particular consisting of a semi-finished container according to the present disclosure. This makes it possible to realize the aforementioned advantages, in particular with regard to synergistic effects along the individual process phases in the production of the plastic canning device starting from a plastic blank.

[0079] In this case, a / the separated head section can optionally engage in a stiffening base area of ​​a / the base body of the container in a form-fitting manner, doubling the wall, particularly in the case of conical head sections.

[0080] The aforementioned object is also achieved by a computer program product comprising instructions which, when the computer program product is executed on a computer, cause the computer to carry out a method according to the following steps on or by means of the computer, in particular a computer program product configured to control / regulate an at least partially automated method for the at least partially automated production of a stackable plastic canning device according to the present disclosure: providing at least one container component of a plastic container of a / the stackable plastic canning device and a metallic lid by separating it, placing the lid onto a closure opening of the container created by the separation, forming the lid in a force-fitting / positively sealing manner in the region of the closure opening by a relative rotational movement between the container and at least one pressing tool.This allows the aforementioned advantages to be realized, particularly with regard to the most efficient way of manufacturing plastic canning devices. Optionally, stiffening of a / the base region of the container base formed by one of the container components can also be provided by means of one / the other of the container components, in particular by plugging the container components into one another. This plug-in connection can also include a locking mechanism or the like, which prevents the form-fitting container component from falling out. In this way, an even further optimization of the wall thickness in combination with a sustainable use of waste can be achieved, particularly for conical container head sections.

[0081] The computer program product can additionally also be implemented for process steps relating to the production of the container components starting from a plastic blank, in particular steps relating to forming into a negative form and steps relating to separating the container component intended for stiffening purposes from a base body of the container intended for holding / preserving the food.

[0082] The aforementioned object is also achieved by a system for the at least partially automated production of a plurality of stackable and optionally reinforced / stiffenable plastic canning devices in the base region, each according to the present disclosure, wherein the system comprises at least one pressing tool configured to exert a radial force between the lid and the container, wherein the system has a control / regulation device, wherein the system is configured for relative rotation between a respective plastic canning device and the at least one pressing tool during the exertion of the radial pressing force, in particular by a rolling relative movement for the force-fitting / form-fitting closure of the container by means of the lid edge, wherein the system is configured to separate a container component from / the base body of the container to form the closure opening,The system is preferably also configured for the at least partially automated feeding of containers and / or lids to be processed and / or for the at least partially automated discharge of closed, reinforced plastic canning devices. This allows the aforementioned advantages to be realized, particularly with regard to an advantageous manner of producing large quantities of containers or plastic canning devices.

[0083] Advantageously, the system is also configured for the provision and optional insertion of a container component intended and designed to stiffen the base area of ​​the base body. This process step can also be implemented as a retrofit option.

[0084] In terms of process, the container production process can be implemented separately from the process of producing filled or yet-to-be-filled plastic canning devices, or it can be implemented in conjunction with them. The specialist can adapt the process chain to the specific requirements and automation possibilities.

[0085] It should be understood that the provision of the container components or the stiffening of the base area of ​​the container body using one of the container components can be implemented at different process times. In other words: The separation of the container head section intended for stiffening purposes does not necessarily have to take place at a specific time along the process track. This applies both to the system itself and to the control / regulation system or a computer program product implemented for this purpose. Advantageously, a separation plane also forms the container edge or the closure opening, so that the separation process can be coordinated with the filling process, if provided for.Largely independent of the separation process, the stiffening process can be implemented procedurally, be it before / after filling or immediately before stacking of already filled or still empty plastic canning devices.

[0086] Summary: The present invention provides an advantageous container configuration, on the one hand with regard to the stable design of the plastic container for the purpose of stackability, and on the other hand also with regard to good volumetric yield, i.e. with regard to advantageous packaging dimensions, e.g. during transport on pallets or in containers. The head and base sections of the containers are provided with positively interlocking contours that correspond geometrically to one another, in particular with positive locking via a preferably cylindrical axial section of the closure opening, and on the other hand with positive locking via a preferably conical radial section in the head or base region. In this case, process-related aspects in the production of the containers orThe individual container components are taken into account, particularly in that a parting line for separating a container component intended for stiffening purposes can also be used as a connection interface or closure opening for the conservational closure of the container using a metallic lid. Optionally, a wall reinforcement in the base area can be realized using a separated container component, creating a container specifically stiffened for stacking, particularly with a conical head section. At the same time, the forming process for creating the container from a plastic blank remains comparatively streamlined in terms of process. SHORT DESCRIPTION OF THE CHARACTERS

[0087] The invention is described in more detail in the following drawing figures. Reference numbers not explicitly described in a particular drawing figure refer to the other drawing figures. They show: Figures 1A, 1B each in a side view in a schematic representation of a container semi-finished product according to an embodiment; Figure 2 in a side view in a schematic representation of a container semi-finished product according to an embodiment; Figure 3 in a top view a pallet arrangement with semi-finished containers or plastic canning devices arranged thereon, each according to embodiments; Figures 4A, 4B each in a side view in a schematic representation of a container semi-finished product according to an embodiment; Figures 4C, 4D in a top view and in a detailed side view of a container semi-finished product according to an embodiment; Figure 5in perspective view a container semi-finished product according to an embodiment; Figure 6 in a side view, two stacked container semi-finished products or plastic canning devices, each according to embodiments, with interlocking axial and radial sections of the containers; Figures 7A, 7B each in a perspective side view in a schematic representation of a plastic canning device, once in an exploded view, once with the lid attached or molded on; Figures 8A, 8B in a side view and in a perspective side view, each in a schematic representation of a plastic canning device, each with an attached or molded-on lid; Figures 9A, 9B each in a perspective side view in a schematic representation of a system for the at least partially automated production of a plurality of plastic canning devices according to embodiments, wherein Fig. 9Aa procedural phase of filling and Fig. 9B illustrate a procedural phase of forming; Figures 10A, 10B each in a side view in a schematic representation of an edge region of a lid arranged for the inventive molding onto the container, according to two embodiments, to form the plastic canning device; Figure 11 in a side view a container and lid of a plastic canning device according to an embodiment; Figures 12, 13 each in a sectional side view a section of a / the positive coupling which is formed on container semi-finished products or plastic canning devices which are adjacent to or stacked on top of one another according to exemplary embodiments; DETAILED DESCRIPTION OF THE FIGURES

[0088] The invention will first be explained with general reference to all reference numerals and figures. Special features or individual aspects of the present invention, or aspects that are clearly visible / depictable in the respective figure, will be addressed individually in connection with the respective figure. It should be understood that, although the cylindrical container shapes depicted in the figures do not describe the angular design according to the invention for the purpose of volumetric optimization, they are nevertheless in the context of the technical teaching of the invention in connection with the stackable design and the plastic-metal material pairing.

[0089] In this respect, a plastic canning device 10 is also provided, which is configured for preserving foodstuffs 1, such as vegetables (e.g., prepared vegetables such as makdous), fish, meat, in particular pickled / preserved in a filling fluid 3 (e.g., in oil). The plastic canning device comprises a container 10.1 made of plastic, in particular of transparent plastic, the container having a closure opening 10.3; the plastic canning device comprising a metallic lid 11, which is connected to the container 10.1 by means of a lid edge(s) 11.1, preferably integrally formed over its entire circumference, in the region of the closure opening 10.3. The container wall 10.2 is preferably substantially cylindrical (cylindrical or parallel / vertical section 10.2b), and can be formed, in particular, in the region below the closure opening 10.3, firstly, a cylindrical section 10.2b, which can be coupled in a form-fitting, centering manner when stacking several containers, and then a conical section 10.2a, particularly for the purpose of good structural rigidity even with a comparatively thin wall thickness. The upwardly open container rim 10.4 is expediently cylindrical, and the container base 10.5 expediently provides the largest possible flat, stable support for the entire container. Furthermore, it is geometrically designed to correspond to the closure opening or the head region of the container or the corresponding container component (negative shape) in order to enable form-fitting stacking.

[0090] The container can be manufactured from a semi-finished container 10.1a, in which a first container component 10.1 forms the base body of the container. A second container component 10.8 is separated from this, which can either allow for a double wall in the base area or represent rejects / waste. The separation process creates the required clean (cut) edge of the closure opening, allowing the lid to be coupled to it in a tight seal.

[0091] According to the present disclosure, the respective container is provided with a metallic lid 11 for creating a force-fitting / positive seal 13 by molding, wherein the lid has a lid rim 11.1 with an axial inner edge section 11.2a and an axial outer edge section 11.2b (or radial outer edge section 11.2b). The lid 11 preferably also has an opening / closing mechanism 11.3 (e.g., an eyelet or tab by means of which an irreversible predetermined breaking point on the lid can be broken open). Optionally, a seal 14 or an additional sealing element, in particular made of non-metallic material, can be provided on the underside of the lid rim, depending on the required sealing effect (e.g., if a hermetic, gas-tight seal is required).

[0092] Also provided is a system 20 configured for the at least partially automated production of a plurality of plastic canning devices 10 according to the present disclosure, wherein the system comprises at least one pressing tool 23 (molding unit) configured to exert a radial force (and optionally also a vertical force) between the lid (rim) and the container (closure opening), wherein the system has a control / regulating device 25, wherein the system is configured for relative rotation between a respective plastic canning device or the container 10.1 and the at least one pressing tool 23 during the exertion of the radial pressing force, in particular by a rolling relative movement for the force-fitting / form-fitting closure of the container 10.1 by means of the lid rim 11.1, wherein the system is preferably also configured for the at least partially automated feeding of containers 10 to be processed.1 and / or lids 11 and / or for the at least partially automated discharge of closed plastic canning devices 10. The feeding (lid feeding unit 24) and / or discharge of the containers or closed plastic canning devices can be controlled / regulated by means of a feed unit 21. The forming unit 23 comprises, for example, two automatically actuatable roller rotating units 23.1, 23.2. A drive unit 26 of the system can, for example, rotate a plate 27 or the correspondingly designed process-related handling diameter around a pivot point, so that the respective container can be handled optionally in combination with a coordinated automated movement of the components 23, 24, 30.A filling device 30 is provided upstream of the lid feed unit 24 and the forming unit 23 and can optionally also have a first filling unit 31 for fluid and a second filling unit 32 for the respective food. Optionally, the fluid and food can also be supplied together via a (single) filling unit.

[0093] In the figures, r, z indicate the radial direction and the vertical direction, and d10, d11 indicate the diameter of the respective container 10.1 and the respective lid 11, and z10 indicates the height of the respective container.

[0094] In the following, special features of the invention are explained with reference to individual figures or embodiments.

[0095] In Fig. 1AA semi-finished container 10.1a is shown, in which the head section (second container component) is still to be separated. Between the head section and the base body of the container there is a tapered section 10.1b, for example with at least partially conical geometry. Nevertheless, the diameter of the closure opening is comparatively large in relation to the width of the container; this wide / large closure opening is particularly useful or necessary for filling and removing prepared vegetables such as makdous. The base area has a negative contour, which is designed to correspond to the head section of the first container component 10.1. This allows the container to be stacked in a form-fitting manner, with a comparatively stable arrangement even without any surrounding cardboard, for example stacked on a pallet ( Fig. 3 ).

[0096] In Fig. 1BThe optional process of stiffening the container base area using the second container component 10.8 is illustrated. It should be understood that the second container component 10.8 is produced from the blank, if not in exactly this geometry, then as overhang material in order to create a clean cutting edge 10.7 for the closure opening in the parting plane Er ( Fig. 1A ), which should be designed as a clean interface as possible for the coupling with the metallic lid. The present invention is therefore also based on the concept of utilizing the waste material (here: the second container component) by appropriately specifying a negative mold for a wall reinforcement to form a stiffened container 10.1' with highly sustainable material usage (in particular, minimal wall thickness).

[0097] In Fig. 1Bfurthermore, a conical head section 10.9 in combination with a cylindrical extension 10.91 is illustrated, which merges into the closure opening.

[0098] In Fig. 2 A further embodiment of the container geometry is shown (second container component already separated); the head section of the first container component (base body) is approximately flat / plane horizontal, i.e., designed without conicity.

[0099] In the Fig. 1 and 2The container has a blind hole area 10.61 (preferably cylindrical) at the bottom, optionally in combination with a conical bottom section 10.6. This negative mold forms the form-fitting counterpart to the head section of the respective container when stacked, and the geometry of a separated second container component can optionally correspond to this shape, allowing for the optional implementation of a double wall. The double wall also facilitates scaling up to very large stackable container volumes, especially over 12 liters, without having to significantly increase the container wall thickness.

[0100] In Fig. 3 An arrangement of many containers on a pallet is shown. The invention not only provides the advantage of stackability, but also a minimal packing size in width and depth, especially scaled to the dimensions of a standard Euro pallet.

[0101] In Fig. 4Aa labelling area B 1 (in particular flat / level) provided on at least one side of the container wall is illustrated; in this container, too, the second container component has already been separated.

[0102] In Fig. 4B A support element bonding area B2 (in particular flat / level) is illustrated, preferably provided on opposite sides of the container wall, to which, for example, a plastic support element can be bonded. This facilitates even easier handling, particularly of containers with a comparatively large volume, e.g., in the range of 5 to 10 liters.

[0103] In Fig. 4c the container geometry is shown in plan view.

[0104] In Fig. 4D the cylindrical section in the area of ​​the closure opening is shown in detail, with an adjoining more or less conical head section of the container (second container component already separated).

[0105] In Fig. 5 Container 10.1 is shown as an intermediate product, i.e. without a lid.

[0106] In Fig. 6 A stacked arrangement is shown (container 10.1 or device 10 closed with a lid). Stacking can also be done with three, four, five, or more containers. The cylindrical area of ​​the closure opening and the geometrically corresponding base area form a positive coupling with a centering function.

[0107] In the following, further details of the invention are explained in more detail, in particular by describing, among other things, further container geometries.

[0108] In the Figures 7A, 7B a plastic canning device 10 with a cylindrical container 10.1 and a lid 11 attached or molded thereon is illustrated.

[0109] In the Figures 8A, 8Ba plastic canning device 10 is illustrated with a container 10.1 and attached or molded-on lid 11, wherein the container 10.1 also has a conical section 10.2a, wherein the lid edge 11.1 has a U-shaped cross-sectional profile, wherein within the closed plastic canning device 10 ( Fig. 8B ) optionally a spacer attachment 5 can also be inserted, in particular for the purpose of better storage or stabilization of food (in particular also protection against shaking / rattling).

[0110] In the Figures 9A, 9B a system 20 for at least partially automated production of a plurality of plastic canning devices according to embodiments is illustrated, wherein Fig. 9A a procedural phase of filling and Fig. 9Billustrate a procedural phase of the forming process. Filling can occur first (filling device 30), then the lid can be fed and placed on the container (lid feed unit 24), and then forming can take place (forming unit 23 or pressing tool), for example, by two counter-rotating roller rotating units 23.1, 23.2 forming the lid edge and laterally molding it around the container edge. The feed unit 21 can also be used to advance the containers 10, indicated here by the arrows pointing to the right in the figure. Fig. 9B A design without a cutting unit is illustrated (separate process in another system). Fig. 9A A separation unit 28 (in particular a rotatable cutting unit) with a separation tool 29 (in particular a rotatable cutting tool) is also shown. Optionally, this process can be carried out separately in an upstream system.

[0111] In the Figures 10A, 10B Illustrated in detail is a U-shaped or L-shaped edge region 11.1 of exemplary lids adapted for molding onto the container according to the invention to form the plastic canning device. Optionally, a sealing element 14 can also be inserted.

[0112] In Fig. 11 Another embodiment of a plastic canning device 10 is illustrated, which can be advantageously used for particularly large volumes. The lid of this embodiment can have multiple phases, particularly for the purpose of greater stability or structural rigidity.

[0113] In Fig. 12 Another example of the positive connection between the container lid or closure opening and the container base of another container is shown, with centering by the cylindrical section 10.2b, whereby a positive support also takes place in a conical section.

[0114] In Fig. 13 Another example of the positive connection between the container lid or closure opening and the container base of another container is shown, with centering by the cylindrical section 10.2b, whereby a positive support also takes place in a conical section.

[0115] From the Fig. 12, 13 It can also be seen that the interface between the lid area or head section and the base area is comparatively slim, meaning, on the one hand, there are no empty spaces or cavities, and on the other hand, there are no material accumulations. In other words: the respective plastic canning device remains slim and light in its own weight in terms of material usage, and the desired stability is achieved primarily through the form-fitting nesting, particularly in the area of ​​the lid and the shoulder or the conical head section. List of reference symbols

[0116] 1Food 3Filling fluid, in particular oil, e.g. olive oil 5Spacer attachment 10Plastic canning device 10.1Plastic container (in particular first container component) 10.1'Stiffened container, formed from at least two container components 10.1aSemi-finished container or intermediate container product 10.1bTapered section between first and second container component 10.2Container wall 10.2aConical section, in particular head region of the container 10.2bCylindrical or parallel / vertical section 10.3Closure opening 10.4Container rim, in particular cylindrical 10.5Container base 10.6Conical base section 10.61Blind hole region, preferably cylindrical 10.7Cut edge 10.8Container component (in particular second container component), in particular cut-off container head (section), advantageously designed to form a container base stiffener 10.9Conical head section 10.91Extension, preferably cylindrical 11Metallic lid 11.1Lid rim 11.2aaxial edge section inside 11.2baxial edge section outside or radial edge section outside 11.3opening / closing mechanism 13positive / positive sealing 14seal or additional sealing element 20system 21feed unit 23pressing unit or pressing tool 23.1first roll rotating unit 23.2second roll rotating unit 24lid feeding unit 25control / regulating device 26drive unit 27plate or process-related handling diameter around pivot point 28(Separating) unit, in particular rotatable cutting unit 29(Separating) tool, in particular rotatable cutting tool 30filling device 31first filling unit 32second filling unit B1labeling area, in particular flat / even B2supporting element adhesive area, in particular flat / even d10diameter or Cross-sectional width of the container d11Diameter of the lid or closure opening ErParting plane z10Height of container r, zradial direction, vertical or height direction.

Claims

1. Plastic canning device (10) for preserving foodstuffs such as vegetables, nuts, fish, meat, in particular pickled / preserved in fluid, wherein the plastic canning device (10) is made from a semi-finished container (10.1) made of plastic for forming at least one container component with a closure opening (10.3) of a container of the plastic canning device, wherein the plastic canning device (10) comprises a metallic lid (11) which is connected by means of a lid edge (11.1) in a force-fitting / positively locking manner over its entire circumference in the region of the closure opening (10.3) to the container component made from the semi-finished container in such a way that the container is sealed in a preservative manner; characterized in thatthe container semi-finished product geometrically forms a base body of the container both in a head region and in a base section of the container in such a way that when several containers are stacked on top of one another, at least in the region of the closure opening, a positive engagement of the corresponding geometrically corresponding head regions and base sections occurs.

2. Plastic canning device (10) according to the preceding claim, wherein the container semi-finished product defines an upwardly projecting shoulder in the head region of the container and defines a correspondingly designed upwardly offset shoulder in the bottom portion of the container.

3. Plastic canning device (10) according to one of the preceding claims, wherein the container semi-finished product defines a downwardly directed concave groove in the head region of the container and defines a correspondingly designed downwardly convex bulge in the bottom portion of the container.

4. Plastic canning device (10) according to one of the preceding claims, wherein the container semi-finished product defines the contours or sections (in particular shoulders, steps, grooves, beads) which are designed geometrically corresponding to one another in the head region and in the bottom region, each on a conical section of the container.

5. Plastic canning device (10) according to one of the preceding claims, wherein positive stacking of a plurality of plastic canning devices is ensured on the one hand by positive locking via a preferably cylindrical axial section of the closure opening of a / the respective plastic canning device, and on the other hand by positive locking via a preferably conical radial section in the head or bottom region of a / the respective plastic canning device.

6. Plastic canning device (10) according to one of the preceding claims, wherein the container defines a preservation volume of at least three liters, advantageously at least five liters.

7. Plastic canning device according to one of the preceding claims, wherein by means of the closure opening a positive coupling for stacking the plastic canning device is provided, which is geometrically designed at least approximately corresponding to a correspondingly negatively designed concentric bottom region of the container, in particular with a height of approximately 10-20 mm, e.g. 16 mm.

8. Plastic canning device (10) according to one of the preceding claims, wherein the outer contour of the closure opening is designed geometrically corresponding to a correspondingly negatively designed concentric bottom region of the container, in particular with a shape / dimensional deviation of max. 1 mm in the width direction, in particular with an at least approximately cylindrical coupling section.

9. Plastic canning device according to one of the preceding claims, wherein the positive nesting can be ensured by stacked containers or plastic canning devices engaging one another in a form-fitting, geometrically corresponding manner, in a stiffening manner, in particular in the manner of a plug-in connection with positive self-centering.

10. Plastic canning device according to one of the preceding claims, wherein the container, apart from the container edge or apart from the closure opening, has a rectangular, in particular square, geometry or basic shape in cross section.

11. Use of a transport logistics unit, in particular a Euro pallet, for the spatially most closely packed arrangement of a plurality of plastic canning devices according to one of claims 1 to 10, which are stacked one inside the other and optionally also arranged flat laterally against one another, during transport or storage of the plastic canning devices.

12. Use of a lid rim (11.1) of a metallic lid (11) for the force-fitting / form-fitting molding of the lid (11) in the region of an at least approximately cylindrical closure opening (10.3) of a container (10.1) made of plastic for providing a sealed and form-fitting stackable plastic canning device (10) according to one of claims 1 to 10 for preserving foodstuffs such as vegetables, nuts, fish, meat, in particular pickled / preserved in fluid, wherein the lid rim (11.1) is preferably slipped over the closure opening (10.3) by means of two legs aligned at least approximately parallel to one another or is placed on the container rim (10.4) by means of an L-shaped cross-sectional profile open downwards and radially outwards, and is then connected to the container rim in a force-fitting / form-fitting manner by molding the lid rim profile onto it.

Images