Labelless plastic container with deformation portion, tool and method for producing such a container

Abstract

The invention relates to a plastic container (1) for receiving liquids, in particular beverages, having a base portion (2), a main body (4) which adjoins the base portion (2) and which forms a receiving volume for receiving the liquid and which extends in a longitudinal direction (L) of the plastic container, a shoulder region (8) which adjoins the main body in the longitudinal direction (L) and in which a cross section in the longitudinal direction (L) is reduced, and having a mouth region (10) which adjoins the shoulder region (8) in the longitudinal direction (L) and in which a mouth is formed via which the liquid can be supplied to the container, wherein the shoulder region and the mouth region are arranged in an upper section of the plastic container relative to the longitudinal direction (L), wherein the plastic container has a deformation portion (6) below the mouth portion (10) in the longitudinal direction (L), in which deformation portion the plastic container (1) is elastically deformable with respect to its longitudinal direction and wherein the container is label-free and preferably also printing-free.

Description

[0001] HANNKE BITTNER & PARTNER

[0002] PATENT ATTORNEYS AT LAW

[0003] Prüfeninger Straße 1

[0004] 93049 Regensburg

[0005] KRON ES AG 10 September 2025 Böhmerwaldstr. 5 KNS01-1354-WOPT 93073 Neutraubling Bl / fa / gu

[0006] Labelless plastic container with deformation section, tool and method for manufacturing such a container

[0007] Description

[0008] The present invention relates to a plastic container for holding liquids, and in particular beverages. Such plastic containers have been known for a long time and are now the predominant beverage packaging in the beverage industry. After manufacturing and filling, these containers are generally stacked on pallets. To ensure pallet stability for storage and transport, as well as to prevent the bottles from breaking, the containers require a certain "filled topload," meaning a resistance to the vertical forces that occur during stacking. In lighter beverage containers, this resistance builds up due to the vertical compression of the container and the parallel increase in internal pressure. The areas where the container can be compressed are typically the bottom and any areas in the center of the container that have a smaller diameter (pinch).

[0009] A device and a method for forming plastic preforms into plastic containers have long been known in the art. Typically, heated plastic preforms are fed into forming stations and, within these stations, are formed into plastic containers, particularly by applying a gaseous or liquid medium. It is known in the art, on the one hand, to expand the plastic preforms using a gaseous medium, and especially compressed air; however, it has recently become known to expand the plastic preforms using a liquid, in particular HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0010] - 2 - by means of a beverage to be filled. The present invention is applicable to both methods.

[0011] In most container designs, the internal pressure contributes less to the force the container can exert to support a stacked load. In this case, deformation occurs, which builds up the internal pressure and thus the topload. The shoulder of the container should generally not collapse, as deformations there do not reverse themselves when the load is removed. The container is deformed in this way, particularly by the snapping of a mouthpiece into the shoulder.

[0012] If the container is deformed at the base, there is a high probability that it will tilt after the load is removed. Deformations further towards the center of the container also pose a risk of tilting containers and permanent design changes that are detrimental to the brand image. Furthermore, with most containers, deformation often leads to significant buckling, resulting in pallet instability.

[0013] More recently, efforts have been made to produce such containers in an increasingly sustainable way, particularly by using less plastic. There is also a focus on improving the recyclability of these containers. This can be achieved, in particular, by manufacturing the containers from as few different materials as possible. Furthermore, there is a constant effort to reduce the weight of such containers and thus the amount of material required.

[0014] The present invention therefore further aims to provide a plastic container that can withstand a certain top load or stresses in its longitudinal direction. In particular, it should not cause permanent deformation of the container. This should also apply to a plastic container made of readily recyclable material.

[0015] This object is achieved according to the invention by the subject matter of the independent claims. Advantageous embodiments and further developments are the subject matter of the dependent claims. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0016] 3 -

[0017] A plastic container according to the invention for holding liquids, and in particular beverages, comprises a base section, a main body adjoining the base section which forms a receiving volume for the liquid and extends in a longitudinal direction of the plastic container. In addition, a shoulder section adjoining the main body in the longitudinal direction is provided, in which the cross-section decreases in the longitudinal direction, and an opening section adjoining the shoulder section in the longitudinal direction, in which an opening is formed through which the liquid can be supplied to the container (and / or through which the liquid can be removed from the container). The shoulder section and the opening section are arranged in an upper section of the plastic container with respect to the longitudinal direction.It should be noted that, for the sake of simplicity, the term "container" is often used in the present text, whereby this term refers to the plastic container.

[0018] Furthermore, the plastic container (particularly in the upper section) and in the longitudinal direction below the mouth section and especially also below the shoulder section has a deformation section in which the plastic container is deformable with respect to its longitudinal direction and, in particular, elastically deformable. Furthermore, the plastic container is label-free and preferably also print-free.

[0019] Preferably, the deformation section is arranged in the longitudinal direction of the plastic container essentially in the middle of the plastic container or in an area above the middle and below the shoulder area.

[0020] "Essentially in the middle" is understood to mean an area which, in relation to the total height of the container, is located between the lower 30% of the height and the upper 30% of the height, and preferably between the lower 40% of the height and the upper 40% of the height.

[0021] In a preferred embodiment, the plastic container is essentially rotationally symmetrical with respect to its longitudinal direction, whereby structures serving to mark the container and structures serving the deformation section are not taken into account. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0022] - 4 -

[0023] Preferably, the plastic container is also designed to be pressure-free.

[0024] Label-free training eliminates the need for other materials such as labels, adhesives, and printing.

[0025] In a preferred embodiment, the container has a filling volume greater than 0.31, preferably greater than 0.41, and preferably greater than or equal to 0.51. In a further preferred embodiment, the container has a filling volume less than or equal to 51, preferably less than or equal to 41, more preferably less than or equal to 31, more preferably less than or equal to 2.51, more preferably less than or equal to 2.01, and more preferably less than or equal to 1.51 and more preferably less than or equal to 1.01.

[0026] In a preferred embodiment, the deformation section enables a deformation of the plastic container in its longitudinal direction by at least 2mm, preferably by at least 3mm, preferably by at least 4mm, preferably by at least 5mm, preferably by at least 8mm, and particularly preferably by at least 10mm.

[0027] In a preferred embodiment, the deformation section allows the plastic container to be deformed in its longitudinal direction by a maximum of 100 mm, preferably by a maximum of 90 mm, preferably by a maximum of 80 mm, preferably by a maximum of 70 mm, preferably by a maximum of 60 mm, preferably by a maximum of 50 mm, preferably by a maximum of 45 mm, and particularly preferably by a maximum of 40 mm.

[0028] Therefore, the invention proposes providing for a deformation of the container, particularly in the aforementioned deformation section or area, and especially below the shoulder area. This area has not previously been used as a deformation area in the prior art. In this application, the terms deformation section and deformation area are used synonymously.

[0029] The container is particularly preferably compressible in its longitudinal direction, especially through the aforementioned deformation area.

[0030] In another preferred embodiment, the container is a HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0031] 5 -

[0032] Disposable plastic container.

[0033] In another preferred embodiment, the container is intended for holding non-carbonated beverages.

[0034] In another preferred embodiment, this compressible deformation area has an approximately constant diameter.

[0035] In a further advantageous embodiment, the diameter of the plastic container above the deformation section or above the deformation area is greater than or equal to the diameter of the deformation section or the deformation area.

[0036] Preferably, the diameter of the plastic container increases upwards from the deformation section, i.e., towards the opening, or remains constant over a predetermined distance. Preferably, the increase in diameter is less than 100% compared to the diameter in the deformation section, preferably less than 80%, preferably less than 60%, preferably less than 40%, preferably less than 30%, preferably less than 25%, preferably less than 20%, and most preferably less than 15%.

[0037] In another preferred embodiment, this compressible deformation area has a non-constant diameter, but is conical. The ribbing present in this section ensures that the section can be compressed stably and does not fold inwards. This is achieved by a corresponding rib geometry that, when compressed in this section, causes the ribs to support each other.

[0038] In one embodiment, the rib geometry produces a defined deformation pattern.

[0039] In a further preferred embodiment, container information is attached to and / or formed on an outer surface of the plastic container, and in particular on the base body. This container information can, for example, be engraved into the plastic wall using a laser process. This area of ​​the container provided with the container information is referred to below as HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0040] 6 - also known as the marking section.

[0041] In a further preferred embodiment, at least one container information is attached to the plastic container by means of a wall structure. Preferably, in this case, the container information is container information that was generated by a forming process by means of which plastic preforms were transformed into plastic containers, and in particular by a (stretch) blow molding process.

[0042] In a preferred embodiment, the container information and / or the marking elements are applied to the plastic container by an embossing process during a forming process or by a laser process. These methods have proven particularly advantageous in achieving high container stability.

[0043] Particularly preferred are container information and / or marking elements that were produced by an embossing process during a forming process, as well as marking elements that were produced on the plastic container by a laser process.

[0044] Preferably, the plastic container therefore has both (marking) elements produced by the blow molding process and (marking) elements produced by another process, and in particular laser-cut elements. The applicant has found that the combination of (marking) elements produced by the blow molding process and (marking) elements produced by another process can significantly increase the stability of the plastic container.

[0045] In addition, this method can also improve flexibility regarding the desired markings.

[0046] Preferably, the plastic container has at least two, preferably at least three and preferably at least four (marking) elements which were produced by the blow molding process and which are preferably spaced apart from each other.

[0047] Preferably, the plastic container has at least two, preferably at least three, and HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0048] 7 - preferably at least four (marking) elements which were produced by a further process (in particular after the blow molding process) and in particular by a laser (engraving) process and which are preferably also spaced apart from each other.

[0049] In a further preferred embodiment, the plastic container is therefore provided with information, preferably this information not requiring materials different from the material of the plastic container. In this way, the recyclability of the plastic container can be improved.

[0050] In a further preferred embodiment, the container information is selected from a group of properties and / or information of the container, wherein the group includes a designation of a foodstuff, in particular as a filling product, a net fill quantity, a best-before date of the filling product, a country of origin or place of provenance, a name and / or trademark of a manufacturer and / or distributor, an allergy label, a list of ingredients, a quantitative indication of ingredients, storage and usage conditions, an alcohol content of the filling product and / or a nutritional declaration.

[0051] In a further advantageous embodiment, the wall thickness of the base body, particularly at a point on the largest container diameter, is less than 0.8 mm, preferably less than 0.7 mm, preferably less than 0.6 mm, preferably less than 0.5 mm, preferably less than 0.4 mm, preferably less than 0.3 mm, preferably less than 0.2 mm, and most preferably less than 0.15 mm.

[0052] In a further advantageous embodiment, the wall thickness of the base body, particularly at a point of the largest container diameter, is greater than 0.05 mm, preferably greater than 0.08 mm, preferably greater than 0.1 mm, preferably greater than 0.15 mm.

[0053] Preferably, the wall thickness of the base body is essentially constant in an area where no markings are formed and which preferably has substantially the same diameter. Essentially constant is understood to mean that the wall thickness varies by no more than 30%, preferably by no more than 25%, preferably by no more than 20%, preferably by no more than 15%, and most preferably by no more than HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0054] 8 - more than 10% and especially preferably deviates by no more than 5% from a given mean value.

[0055] Preferably, the wall thickness of the base body is essentially constant in an area where markings are formed. However, the wall thickness can vary in an area where the markings form curvatures.

[0056] In another preferred embodiment, the deformation area has several grooves. Preferably, at least two of these grooves have different or varying groove depths. Thus, it is possible to have two groups of grooves with different groove depths, or alternatively, several, for example at least three or at least four, grooves with different groove depths. Preferably, these grooves are formed at least partially circumferentially around the longitudinal direction of the container.

[0057] In another advantageous embodiment, the container is circular or rotationally symmetrical to its longitudinal direction.

[0058] In a further preferred embodiment, the bottom section has a plurality of first ribs extending outwards from a center of the bottom section, and in particular extending radially outwards. Advantageously, a plurality of second ribs are also provided, which extend radially but are preferably shorter than the first ribs. Particularly preferably, the first ribs and the second ribs are arranged alternately in the circumferential direction of the bottom section.

[0059] In a further advantageous embodiment, the short ribs extend radially inwards and terminate – preferably tapered – before the aforementioned central area. A injection point for the container (i.e., an injection point for the plastic preform from which the container was produced) is particularly preferably also located in the central area.

[0060] The central area and / or the bottom section particularly favorably exhibits a dome-like structure.

[0061] Preferably the number of first ribs is greater than 4, preferably greater than or equal to 6 and HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0062] 9 - preferably eight. Preferably the number of second ribs is greater than 4, preferably greater than or equal to 6 and preferably equal to 8.

[0063] Particularly preferred are the first ribs at most 50% longer than the second ribs, preferably at most 40% longer, preferably at most 30% longer. Particularly preferred are the first ribs at least 5% longer than the second ribs, preferably at least 10% longer, preferably at least 20% longer.

[0064] This rib design has proven particularly advantageous in achieving sufficient stability of the base section, even under longitudinal loads. Especially in conjunction with the markings described above, particular benefits arise because the markings also contribute to improved longitudinal stiffness of the plastic container. Consequently, the design of these ribs in the base section must be carefully selected, as it depends on the magnitude and direction of the forces to be transmitted.

[0065] Preferably, the base body also has at least one circumferential groove, and preferably several circumferential grooves, in a section where the bottom section adjoins it in the longitudinal direction of the container. This at least one groove also serves to improve the stiffness of the base body. Preferably, at least two grooves, more preferably at least three grooves, and more preferably at least four grooves are provided in this area.

[0066] This groove is preferred, and these grooves are therefore preferably arranged in the longitudinal direction between the marking area and the floor section.

[0067] Preferably, at most 12 grooves are provided in this area, preferably at most 10 grooves and particularly preferably at most 8 grooves.

[0068] Preferably, the base body also has at least one circumferential groove, and preferably several circumferential grooves, in a section to which the deformation section adjoins the longitudinal direction of the container. This at least one groove also serves to improve the stiffness of the base body. Preferably, at least two grooves, preferably at least three grooves, and preferably at least four grooves are present in this area. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0069] 10 len, preferably with at least five grooves provided

[0070] Preferably, at most 30 grooves are provided in this area, preferably at most 25 grooves, and particularly preferably at most 20 grooves and preferably at most 15 grooves.

[0071] Preferably, the area of ​​the base body in which the markings are arranged (marking section, excluding the bottom section) extends only along a predetermined proportion of the longitudinal extent of the base body. This proportion is preferably less than 80%, more preferably less than 70%, and particularly preferably less than 60%. More preferably, this proportion is greater than 20%, more preferably greater than 30%, and particularly preferably greater than 40%.

[0072] In a further advantageous embodiment, at least one stiffening area is formed on an outer surface of the plastic container. Particularly preferably, at least one stiffening area is formed by a wall material of the plastic container.

[0073] Preferably, in this area the container is less flexible than in other areas. This area can be located in the main body or on the bottom section.

[0074] In a further advantageous embodiment, at least two and preferably at least three stiffening areas are provided.

[0075] The stiffening area can, for example, be a tactile feature, preferably perceptible to the human hand and / or fingers, such as a thickening or thinning of the container wall (wall grooves or flat areas of thinning are also possible). This increases the overall stability of the container's wall structure while simultaneously saving material. Essentially, stiffening areas in a container wall serve to reduce the remaining wall surface area or volume. This means that the remaining sections of the container wall are correspondingly thinner. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0076] 11

[0077] This allows for the production of particularly lightweight containers, which, however, exhibit corresponding wall thickenings in the area of ​​the negative image of the embossing area between the individual lettering elements.

[0078] In a preferred embodiment, a non-continuous display surface is provided, which can advantageously blend with support elements (such as ribs, material thickenings, and / or grooves with information areas). This makes it possible to produce lightweight, no-label bottles.

[0079] Reinforcing elements can also be located in the container wall outside the embossing area. A reinforcing area therefore does not necessarily have to pass through an embossing area, for example in a vertical direction (parallel to the container's longitudinal axis), but can also be located on the container wall, the container base, or in the neck area of ​​the container.

[0080] According to at least one embodiment, the stiffening area in the finished plastic container is formed in the form of at least one stiffening rib.

[0081] In the context of the present invention, a stiffening rib can be an elongated element, shaped like a strip, that forms a wall thickening or thinning compared to the remaining wall thickness of the container. This not only allows for material savings but also results in particularly rigid stiffening areas, thus minimizing the number of stiffening areas required on or within the container wall to provide sufficient stability. According to at least one embodiment, the wall thickness of the base body at a point on the largest container diameter is less than 0.15 mm, preferably at most 0.14 mm and at least 0.11 mm.

[0082] According to at least one embodiment, the minimum weight load limit of the partially filled plastic container along a longitudinal axis is at least 20 kg and preferably at most 30 kg. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0083] 12

[0084] According to at least one embodiment, the stiffening element increases static properties of the plastic container, such as longitudinal axis load (top load) and / or diameter load (side load).

[0085] According to at least one embodiment, the course of the stiffening element also follows force paths in the event of a force load on the plastic container and / or corresponds to or at least partially resembles organic shapes, such as ribs in dragonfly wings.

[0086] According to at least one embodiment, the plastic container was filled with nitrogen before being sealed.

[0087] According to at least one embodiment, at least one inner surface of the blow-molded parts facing the plastic preform has at least one embossing section in the form of at least one surface elevation and / or one surface depression to form at least one migrating elevation or at least one wall depression to create container information on the finished container, such that the container information is a negative image of the embossing section, and / or a digital watermark, in particular the container information, is applied to the finished container. In this respect, the present invention proposes two alternative or complementary methods for applying container information.

[0088] Container information is preferably formed by the container wall itself. This includes the incorporation of a code, such as a watermark. Digital watermarking is a technology for concealing information, useful, for example, in the steganographic coding of printed materials to transmit multiple symbols as user data. For instance, graphics printed on the packaging of a retail product, such as the plastic containers described here, can be marked with a digital watermark containing the product's GTIN (Global Trade Identification Number). Known digital watermarking methods are described, among others, in US patents 6,590,996 and 8,199,969. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0089] 13

[0090] According to at least one embodiment, a digital watermark is used to ensure that the finished containers intended for combination are correctly matched. Examples include container packaging, etc.

[0091] A watermarking system consists of two components: The embedder inserts the watermark information into the medium, for example, the container wall, and the detector can then read it back. Each watermarking system has specific properties that depend on the application of the watermark.

[0092] According to at least one embodiment, digital watermarks are used to reduce a growing type of retail fraud – the swapping of barcodes.

[0093] In another preferred method, the blow mold assembly has two side parts that are pivoted relative to each other to open and close the blow molds. Preferably, this pivoting occurs about a vertical axis and / or about an axis that is parallel to the plastic preform to be expanded.

[0094] Preferably, the blow mold arrangements also have a bottom part which, together with the two side parts, forms the aforementioned cavity.

[0095] Within the scope of the invention, it was recognized that plastic containers are typically provided with a label displaying container information. This container information can include, for example, the container size, the container's volume, or other information about the beverage to be filled.

[0096] However, this label currently has to be removed from the bottle in a time-consuming recycling process. This recycling process is not only time-consuming but also involves certain costs.

[0097] Therefore, in order to make the entire manufacturing process more sustainable, the inventors devised the idea that by preferably completely eliminating labels, corresponding container information, such as label details (printed on the labels) HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0098] 14 can also be applied directly to the outer wall of the container or formed by the outer wall itself.

[0099] Preferably, all labels are therefore omitted, so that the recycling process can avoid this costly and sometimes lengthy process.

[0100] This saves not only material but also energy for the entire recycling process.

[0101] One object of the present invention is therefore to offer a method for manufacturing containers in a particularly simple and cost-effective manner, in which a subsequent recycling process of the containers does not require the removal of labels.

[0102] According to at least one embodiment, the method is characterized in that the container information on the finished plastic container replaces label information, and the finished container is then preferably label-free. It would also be conceivable that part of the consumer information or other information could be printed on the closure, such as text, a QR code, etc.

[0103] According to at least one embodiment, during the forming process the expanding plastic container is pressed against this inner surface by the flowable medium, so that this pressure causes the embossing section to leave the container information as a negative image on the outer surface of the plastic container.

[0104] During the stretch blow molding process, which is taken as an example, the wall material of the expanding plastic preform is pressed against the wall and pressed into the recesses and / or onto the protrusions on the inner surface of the side part, so that a negative pressure image is created on the outer surface of the plastic preform.

[0105] According to at least one embodiment, the embossing section is designed and / or arranged and / or positioned at such locations on the inner surface of the side part that HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0106] 15 the container information on the finished plastic container is formed at least partially with a frosted glass structure on the outer wall of the plastic container.

[0107] According to at least one embodiment, after the forming process at least the embossed section is treated at least partially by means of a radiation and / or heating source in order to create a change in the material structure, in particular wherein the radiation and / or heating source comprises a radiation source, for example a laser source, which hits the material of the outer container wall, i.e. the container information.

[0108] According to at least one embodiment, the change in material structure is formed by an area that is at least partially crystallized.

[0109] A "change in material structure" within the meaning of the present invention can, in particular, also refer to areas on the outer surface which, after the actual finishing, i.e., after the actual blowing of the plastic preforms, have been subjected to a post-treatment such that the material structure changes. This can already include the creation of frosted glass, a change in the transparency of the wall material, or a change in the outer structure, for example, roughness or any other post-treatment effect.

[0110] All features disclosed for the method described here are therefore also disclosed for the device described here, and vice versa.

[0111] Preferably, the opening has a thread, and in particular an external thread. Specifically, this is a screw thread onto which a container closure can be screwed.

[0112] This container closure could be a conventional container closure. However, other types of closures, such as threadless closures, could also be used. An example of this are so-called snap-on closures, which have no threads but are pressed onto the container.

[0113] In another preferred embodiment, the plastic container is sealed with a container closure. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0114] - 16 -

[0115] In another preferred embodiment, nitrogen is located inside the container. In the case of an upright container, this nitrogen is located particularly in its head region.

[0116] Preferably, this nitrogen was introduced during a filling process, and especially after the product had been added. This increases the shelf life of the filled product.

[0117] In another preferred embodiment, the plastic container is provided with a container closure, and this container closure remains connected to the plastic container via a connecting element even when the plastic container is open.

[0118] Preferably, the container closure is made of the same material as the container. In particular, the container closure is a screw cap.

[0119] The plastic container is preferably made of PET.

[0120] In a further advantageous embodiment, the height of the deformation section in the longitudinal direction is less than the height of the base body in the longitudinal direction and / or less than the height in the longitudinal direction of the shoulder area.

[0121] In a further preferred embodiment, the deformation section (relative to the longitudinal direction and to an upright state of the container) is preferably located in the upper half of the container, specifically in the upper third of the plastic container. The upper half is understood to refer to an upright state of the container.

[0122] Preferably, the plastic container is a bias-molded plastic container, and in particular a stretch-bias-molded plastic container.

[0123] In a further advantageous embodiment, the deformation section is arranged in the longitudinal direction of the plastic container directly below the shoulder area. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0124] 17

[0125] In a further advantageous embodiment, the deformation section is arranged longitudinally directly above the base body. Preferably, the deformation section connects the base body directly to the shoulder area.

[0126] In another embodiment, the deformation section is arranged longitudinally in the middle or between the middle and the upper body of the container.

[0127] Preferably, a conical section is provided between the deformation area and the base body. This conical section preferably tapers towards the opening of the container. Preferably, the diameter of the container is reduced by at least 5% in this conical section, more preferably by at least 10%. More preferably, the diameter of the container is reduced by at most 50% in this conical section, more preferably by at most 40%, and most preferably by at most 30%. This section particularly preferably serves to prevent the container from "turtle" and / or tipping over.

[0128] Particularly preferably, the deformation section has a smaller cross-section than the base body, and particularly preferably, the cross-sectional area of ​​the deformation section is between 60% and 98% of the cross-sectional area of ​​the base body, preferably between 70% and 95% of the cross-sectional area of ​​the base body, preferably between 80% and 95% of the cross-sectional area of ​​the base body.

[0129] In a further advantageous embodiment, the cross-sectional area of ​​the deformation section tapers upwards in the longitudinal direction of the container. Preferably, the ratio of the minimum cross-section of the deformation section to its maximum cross-section is between 0.35 and 0.80, more preferably between 0.45 and 0.70, and most preferably between 0.55 and 0.60.

[0130] In a further advantageous embodiment, the base body has a marking area or marking section in which the cross-section of the container is essentially constant in the longitudinal direction. Preferably, this marking area is formed within the base body in the longitudinal direction, i.e., the marking area connects a first section of the base body with a second section of the base body. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0131] - 18 -

[0132] Preferably, the base body has a smaller cross-section in the marking area than in the areas above and below it. Particularly preferably, a grooved section with a plurality of grooves extending one above the other and preferably perpendicular to the longitudinal direction is provided in the longitudinal direction of the container above the marking area. These grooves preferably have the same cross-section. These grooves preferably contribute to the stability of the container in the radial direction.

[0133] In a preferred embodiment, grooves are provided that at least partially, and preferably completely, extend through the surface. These grooves improve grip stability and / or maintain a more stable diameter. It is also possible for some grooves to be slightly deeper to further enhance grip stability.

[0134] In a further advantageous embodiment, the plastic container has at least one first circumferential rib in the deformation section, which is at least partially circumferential. Preferably, this rib or groove is directed towards the inner volume of the container. Particularly preferably, this rib has sections with different radii of curvature and / or different cross-sections.

[0135] In a plane containing the longitudinal direction of the container and a direction extending from the longitudinal direction to the groove, this groove, viewed from above, preferably has an outwardly curved region with a radius of curvature between 1 mm and 2 mm. Preferably, this region is followed by a further inwardly curved radius, preferably between 0.1 mm and 0.3 mm. Particularly preferably, this groove also has a straight section, which particularly preferably widens outwards, from top to bottom.

[0136] In a further preferred embodiment, the first rib has several rib sections which connect to one another in the circumferential direction of the deformation section. Preferably, these rib sections connect directly to one another. Particularly preferably, these rib sections are arranged at the same height with respect to the longitudinal direction of the container. Particularly preferably, the ribs are composed of n repeating identical circumferential segments (n = 2... 13). Particularly preferred HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0137] 19. The rib sections widen from a first starting point and then taper again.

[0138] Particularly preferred is the number of these rib sections greater than two, preferably greater than three, and preferably greater than four. In a further advantageous embodiment, the number of rib sections is less than 13, preferably less than 12, preferably less than 10, and preferably less than 7.

[0139] In a further advantageous embodiment, the plastic container has a second circumferential rib in the deformation section, the second circumferential rib being offset from the first rib in the longitudinal direction. Particularly preferably, the second rib adjoins the first rib directly in the longitudinal direction.

[0140] The second rib is particularly preferably designed in a similar way to the first rib and in particular has a similar cross-section.

[0141] Particularly preferably, the second rib also has several rib sections which are connected to one another in the circumferential direction of the deformation section, wherein the rib sections of the second rib are advantageously offset and / or twisted relative to the rib sections of the first rib in the circumferential direction. Particularly preferably, the second ribs are offset relative to the first ribs by half a division. Preferably, the number of second rib sections corresponds to the number of first rib sections.

[0142] Particularly preferably, the first rib sections and / or the second rib sections enclose an angle greater than 25° in the circumferential direction of the container, preferably greater than 40°, preferably greater than 50°, and preferably greater than 60°. Particularly preferably, the first rib sections and / or the second rib sections enclose an angle less than 200° in the circumferential direction of the container, preferably less than 180°, preferably less than 140°, preferably less than 130°, and particularly preferably less than 100°.

[0143] In a further preferred embodiment, the plastic container has a third rib in the deformation area, which preferably runs along the longitudinal direction of the container. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0144] The third rib is arranged halfway between the first and second ribs. This third rib also preferably has several rib sections. The rib sections of the third rib are preferably rotated or offset in the circumferential direction relative to the rib sections of the second rib. The rib sections of the third rib are preferably arranged in the same rotational positions relative to the rib sections of the first rib.

[0145] However, it is also conceivable that only exactly two such ribs are provided.

[0146] In a further preferred embodiment, an additional circumferentially extending rib and / or groove is formed in the shoulder section. This rib is particularly preferably formed with a uniform cross-section and is particularly preferably fully circumferential. This additional rib particularly preferably serves to relieve stress on the plastic container. This additional rib is particularly preferably smaller in cross-section than the ribs in the deformation area.

[0147] Within the scope of the invention, it is therefore proposed to create a region directly below the shoulder area, which preferably has a conical or dome shape, that allows for spring action. This is the aforementioned deformation section. To achieve this elastic deformation, the interrupted ribs, a diameter reduced compared to the main diameter, and the aforementioned relief rib above the deformation section are proposed, as mentioned above.

[0148] The geometric design of the container described here places the deformation required to build up the necessary topload in the upper part of the container and, moreover, makes it reversible. This prevents the topload from damaging the design. This offers advantages both for stacking the container and for the integrity of the design. Therefore, even with very low container weights, mechanically stable and easily stackable bottles can be produced.

[0149] In a preferred embodiment, the plastic container has a holding volume greater than 100 ml, preferably greater than 300 ml, and preferably greater than 400 ml. In a further preferred embodiment, the plastic container has a HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0150] 21

[0151] The intake volume is a maximum of 8 liters, preferably a maximum of 2.0 liters, preferably a maximum of 1.5 liters.

[0152] The present invention further relates to a mold and, in particular, a blow mold for producing a plastic container of the type described above. This blow mold is preferably designed in at least two parts, and more preferably in at least three parts. The blow mold particularly preferably has at least two side parts which have a corresponding negative of the plastic container to be produced or whose inner wall is designed accordingly.

[0153] The present invention further relates to a method for manufacturing a container of the type described above. In particular, the method is a blow molding process, and more specifically a stretch blow molding process.

[0154] The containers described above are preferably manufactured using a rotary machine.

[0155] The present invention further relates to a method for forming plastic preforms into plastic containers, wherein a plurality of forming stations for forming the plastic preforms into the plastic containers are arranged on a movable carrier and these forming stations are moved at least temporarily during the forming process along a predetermined transport path, wherein the forming stations each have blow molding assemblies, wherein blow molding parts of these blow molding assemblies are moved to open and close the blow molding assemblies, and in a closed state of the blow molding assembly, the plastic preforms are formed into the plastic containers by applying a flowable medium in a cavity formed by the blow molding parts.

[0156] According to the invention, at least one inner surface of the blow mold or blow mold parts facing the plastic preform forms a plastic container section by section according to at least one of the preceding claims.

[0157] Further advantages and embodiment are shown in the attached drawings: HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0158] 22

[0159] This shows:

[0160] Fig. 1 shows a perspective view of a plastic container according to the invention;

[0161] Fig. 2a, b two detailed views of the upper area of ​​a plastic container;

[0162] Fig. 3 shows a front view of the plastic container shown in Fig. 1;

[0163] Fig. 4 Detail B from Fig. 3;

[0164] Fig. 5 Detail C from Fig. 3;

[0165] Fig. 6 shows a top view of the plastic container according to the invention;

[0166] Fig. 7 shows a view from below of the bottom section of the plastic container;

[0167] Fig. 8a, b detail C from Fig. 3;

[0168] Fig. 9 shows a view of the container in section AA from Fig. 3 and

[0169] Fig. 10 shows another representation of the floor section with marking elements.

[0170] Fig. 1 shows a view of a plastic container 1 according to the invention. This container has a bottom section 2. A base body 4 of the container, which forms a substantial part of the receiving volume for a liquid, is attached to this bottom section 2. A marking area 42 is provided within this base body. The reference numeral hG denotes the height of this base body in the longitudinal direction of the container. The reference numeral hB denotes the height of the bottom section (also in the longitudinal direction).

[0171] The lower shoulder 12 adjoins the main body in the longitudinal direction L of the container, followed by the aforementioned deformation section 6, which has a height hD. The shoulder area 8 of the container adjoins this deformation section 6. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0172] 23 this in turn a mouth area 10 with a height hM.

[0173] Preferably, the diameter of the shoulder area in the longitudinal direction of the container is reduced upwards from a maximum diameter to at most 80% of this diameter, preferably to at most 70% of this diameter.

[0174] Preferably, the diameter of the shoulder area decreases upwards along the longitudinal direction of the container from a maximum diameter to at least 30% of this diameter, more preferably to at least 40%, and more preferably to at least 50%. This ratio has also proven significant for enabling a sufficient topload. Preferably, an overhang is located between the deformation area and the shoulder or shoulder area, which is particularly designed as a shoulder cone.

[0175] An external thread 10a is preferably arranged at the opening. This is preferably a short thread. The height of this thread is preferably less than 2 cm, preferably less than 1.8 cm, preferably less than 1.6 cm, and particularly preferably less than 1.5 cm. A greater height of the thread is preferably greater than 0.3 cm, preferably greater than 0.5 cm, preferably greater than 0.6 cm, and particularly preferably greater than 0.7 cm.

[0176] Preferably, this thread is designed such that a container closure can be screwed onto the thread by means of fewer than 2.0 full turns, preferably by means of fewer than 1.8 full turns, preferably by means of fewer than 1.6 full turns and most preferably by means of fewer than 1.5 full turns.

[0177] Preferably, this thread is designed such that a container closure can be screwed onto the thread by means of more than 0.7 full turns, preferably by means of more than 0.8 full turns, preferably by means of more than 0.9 full turns and particularly preferably by means of more than 1.0 full turns.

[0178] It can be seen that the base body section extends over more than half, preferably over more than 55%, and preferably over more than 60% of the total height of the container. The height hD of the deformation section is preferably less than the height hS of the shoulder area and also less than the height hG of the base body. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0179] - 24 -

[0180] Preferably, the height hD is greater than 40% of the height hS, more preferably greater than 50% of the height hS. Preferably, the height hD is less than 80% of the height hS, more preferably less than 75% of the height hS, and most preferably less than 70% of the height hS. These height ratios have also proven to be particularly important for achieving the necessary stability of the container.

[0181] Reference numeral 12 refers to a conical region, preferably arranged between the deformation section 6 and the base body 4, which most preferably tapers upwards. Preferably, the diameter of the container tapers in this region by at least 5%, more preferably by at least 10%. More preferably, the diameter of the container tapers in this region by at most 30%, more preferably by at most 25%, more preferably by at most 20%.

[0182] As mentioned above, the marking area is label-free and preferably also print-free. This marking area has a variety of marking elements 42a - 42d. At least some of these marking elements 42a - 42d are preferably visually perceptible and serve to inform a user, in particular about the contents of the container.

[0183] This marking area can contain, for example, manufacturer names, trademarks, or ingredient information. Preferably, at least some of these marking elements are produced by a blow molding process; that is, the corresponding blow molds have structures that create these marking elements.

[0184] In addition, some of these marking elements are preferably produced by a laser process, in particular a laser engraving process. This laser engraving is carried out especially after the actual manufacture of the containers, in particular their manufacture by a blow molding process and especially a stretch blow molding process.

[0185] The marking element 42c can also have a stabilizing function on the container. This marking element is designed here as a groove that runs continuously, particularly in sections. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0186] 25

[0187] The marking element 42e is arranged in the bottom section 2 and was produced or embossed in particular by a blow molding process.

[0188] Fig. 2a shows a detailed view of the container shown in Fig. 1.

[0189] It can be seen that in the deformation section 6, two grooves 62 and 64 are arranged one above the other in the longitudinal direction L. The groove 62 has three groove sections 62a, 62b, and 62c (not visible), which are adjacent to one another and lie one behind the other in the circumferential direction. The base of each of these three groove sections is preferably the same size. The cross-section of a groove section, such as groove section 62b, preferably widens from its starting point A into a central region M and then tapers again to its end section B. Preferably, the groove sections are each symmetrical with respect to a plane that extends through the center of the groove sections in the longitudinal direction of the container and runs in a radial direction of the plastic container.

[0190] It can be seen that groove sections 64a and 64b are offset by half a division in the circumferential direction of the container compared to groove sections 62a, 62b and 62c.

[0191] In addition, a further groove 82 is provided (above grooves 62, 64), which is formed in the shoulder area 8. It can be seen that this further groove is formed continuously around the circumference without interruption.

[0192] Fig. 2b shows a further detailed representation of a slightly modified container, which can preferably be combined with the above designs.

[0193] It can be seen that in the deformation section 6, three grooves 62, 64, and 66 are arranged one above the other in the longitudinal direction L. The groove 62 has three groove sections 62a, 62b, and 62c, which are adjacent to one another and lie one behind the other in the circumferential direction. The base of each of these three groove sections is the same size. The cross-section of a groove section, such as groove section 62b, preferably widens from its starting point A into a middle region M and then tapers again to its end section B. Preferably, the groove sections are each symmetrical with respect to HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0194] 26 a plane which extends in the longitudinal direction of the container through the center of the groove sections and which runs in a radial direction of the plastic container.

[0195] It can be seen that groove sections 64a and 64b are offset by half a division in the circumferential direction of the container compared to groove sections 62a, 62b and 62c.

[0196] Groove 66 also has three groove sections 66a, 66b and 66c. In the rotational position, these are arranged in the same position as groove sections 62a, 62b and 62c of groove 62.

[0197] In addition, a further groove 82 is provided (above grooves 62, 64, 66), which is formed in the shoulder area 8. It can be seen that this further groove is formed continuously around the entire circumference.

[0198] Fig. 3 shows a representation of the container shown in Fig. 2, with individual sections A, B, C and E highlighted for further illustration. It can be seen that a multitude of grooves are formed both above and below the marking area 42.

[0199] Fig. 4 shows a detailed view F in the area of ​​the base body and the grooves arranged therein. It can be seen that these grooves are connected to each other by a very short groove base. The grooves have a radius of curvature between 1 mm and 2 mm, preferably between 1.2 mm and 1.8 mm, and particularly preferably between 1.3 mm and 1.7 mm.

[0200] Fig. 5 shows a detailed view C in a region of the uppermost groove 66 in the deformation section. It can be seen that, viewed from above, the wall has a radius of curvature R1 and below it transitions via an inwardly curved radius of curvature R2 into an approximately straight section.

[0201] Fig. 6 shows a top view of the container shown in Fig. 1. It can be seen that this container is essentially rotationally symmetrical with respect to its longitudinal direction L. The grooves 62, 64, and 66 in the deformation section are also visible from above. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0202] - 27 -

[0203] Fig. 7 shows a view from below of the bottom section of the container. Here, a total of eight long, radially extending ribs 32 can be seen, which terminate in the central area 34 of the bottom section. The reference numeral 36 designates a center of the bottom section which preferably contains the injection point.

[0204] Reference numerals 38 denote further – albeit shortened – radial ribs, each arranged between the first reinforcing ribs 32. These second radial ribs 38 also extend in the radial direction R, but not to the central area; instead, they terminate approximately halfway across the bottom section.

[0205] Fig. 8a shows a view along the arrows BB from Fig. 3, i.e. in the area of ​​the first of the marking section 42. One can see here a marking element 42g.

[0206] Fig. 8b shows an enlarged view of the area in which the marking element 42g is located. It can be seen that the base body in this area has a wall thickness of approximately 0.06 mm. Preferably, the letter thickness is in the range between 0.3 mm and 0.5 mm, and more preferably between 0.35 mm and 0.45 mm.

[0207] Preferably, the depth (viewed in the radial direction of the base body) of this marking relative to the wall is greater than 0.6 mm, preferably greater than 0.7 mm, preferably greater than 0.8 mm, and particularly greater than 0.9 mm, and particularly preferably greater than 1.0 mm.

[0208] Preferably the depth (considered in the radial direction of the base body) of this marking is less than 1.8 mm, preferably less than 1.6 mm, preferably less than 1.4 mm, and particularly preferably less than 1.3 mm and particularly preferably less than 1.2 mm.

[0209] These dimensions have proven particularly suitable for achieving good visual visibility while also enabling cost-effective manufacturing through blow molding or, if necessary, laser engraving. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0210] 28

[0211] Preferably, the width of this marking (especially in the base of its groove) is greater than 0.5mm, preferably greater than 0.6mm, preferably greater than 0.7mm and particularly preferably greater than 0.8mm.

[0212] Preferably the width of this marking (especially in its groove base) is less than 1.6 mm, preferably less than 1.4 mm, preferably less than 1.3 mm, preferably less than 1.2 mm, and particularly preferably less than 1.1 mm and preferably less than 1.0 mm.

[0213] Fig. 9 shows a sectional view of the container according to the invention. Numerous diameters D1 to D9 are shown. For example, diameter D3, which is also the diameter of the container's base, can be seen. In the area of ​​the marked section, there is a maximum cross-section D5. This maximum cross-section is preferably between 62 mm and 72 mm, more preferably between 64 mm and 70 mm, and most preferably at approximately 67 mm.

[0214] The cross-section D4 in the area where the bottom section transitions into the base body is preferably slightly larger than the cross-section D5 and is particularly preferably between 62mm and 74mm and particularly preferably between 66mm and 70mm.

[0215] Above the marked area, the cross-section D7 is preferably slightly larger than in the marked area.

[0216] Reference numerals D7 and D8 denote cross-sections in the lower and upper regions of the deformation section. Cross-section D7 is preferably located in a range between 48 mm and 55 mm, more preferably in a range between 49 mm and 54 mm, and most preferably in a range between 50 mm and 53 mm.

[0217] The cross-sectional area D8 is preferably in a range between 47mm and 52mm, preferably between 48mm and 51mm and preferably between 48.5mm and 50mm.

[0218] It can also be seen that the floor section extends slightly inwards, which is indicated by the distance A1. HANNKE BITTNER & PARTNER KNS01-1354-WOPT

[0219] 29

[0220] Diameter (D9) preferably has an overhang compared to the diameters in the deformation area (e.g., D8). This overhang can fold over the more flexible deformation area under top load and thus will not subject the shoulder area, particularly in region D9, to tensile stress (radially around the central axis).

[0221] 5

[0222] Fig. 10 shows another view of the bottom section of the plastic container. The marking elements 42b shown here are produced by a blow molding process.

[0223] The applicant reserves the right to claim all features disclosed in the application documents as essential to the invention, provided they are novel individually or in combination compared to the prior art. It is further noted that the individual figures also describe features which may be advantageous on their own. The person skilled in the art will immediately recognize that a particular feature described in a figure may be advantageous even without incorporating other features from that figure. Furthermore, the person skilled in the art will recognize that advantages may also arise from a combination of several features shown in individual or different figures.

Claims

HANNKE BITTNER & PARTNER KNS01-1354-WOPT - 30 - Labelless plastic container with deformation section, tool and method for manufacturing such a container Patent claims 1. Plastic container (1) for holding liquids, in particular beverages, comprising a bottom section (2), a base body (4) adjoining the bottom section (2) which forms a receiving volume for holding the liquid and which extends in a longitudinal direction (L) of the plastic container, a shoulder section (8) adjoining the base body in the longitudinal direction (L) in which a cross-section decreases in the longitudinal direction (L) and an opening section (10) adjoining the shoulder section (8) in the longitudinal direction (L) in which an opening is formed through which the liquid can be supplied to the container, wherein the shoulder section and the opening section are arranged in an upper section of the plastic container with respect to the longitudinal direction (L), wherein the plastic container has a deformation section (6) in the longitudinal direction (L) below the opening section (10),in which the plastic container (1) is elastically deformable with respect to its longitudinal direction and wherein the container is label-free and preferably also print-free.

2. Plastic container according to claim 1, characterized in that the deformation section is arranged in the longitudinal direction of the plastic container substantially in the middle of the plastic container or in an area above the middle and below the shoulder area and / or the deformation section (6) is arranged in an upper half, preferably in an upper third of the plastic container.

3. Plastic container (1) according to claim 1 or 2, characterized in that at least one container information and / or awning is provided on an outer surface of the plastic container (1) and / or through an outer surface by a wall structure. HANNKE BITTNER & PARTNER KNS01-1354-WOPT 31 fastening elements are attached to the plastic container (1) and / or are.

4. Plastic container (1) according to the preceding claim, characterized in that the container information and / or the marking elements are applied to the plastic container by an embossing process during a forming process or by a laser process, and particularly preferably both marking elements produced by an embossing process during a forming process and marking elements produced by a laser process on the plastic container are provided.

5. Plastic container (1) according to claim 2, characterized in that the container information is selected from a group of properties and / or information of the container (20), the group comprising: good legibility, minimum labelling size, designation of a foodstuff in particular as a filling product, net filling quantity, best before date of the filling product, country of origin or place of provenance (name of the company or the address of the food business), allergy labelling, list of ingredients, quantitative indication of the ingredients, storage and usage conditions, alcohol content of the filling product and / or nutritional declaration.

6. Plastic container (1) according to at least one of the preceding claims, characterized in that the wall thickness of the base body (202), in particular at a point of the largest container diameter, is less than 0.15 mm, and preferably less than 0.14 mm and particularly preferably less than 0.11 mm and / or the wall thickness of the base body (202), in particular at a point of the largest container diameter, is greater than 0.01 mm, preferably greater than 0.02 mm, preferably greater than 0.04 mm, preferably greater than 0.06 mm.

7. Plastic container according to at least one of the preceding claims, characterized in that at least one stiffening area is formed on an outer surface of the plastic container and / or by a wall material of the plastic container at least HANNKE BITTNER & PARTNER KNS01-1354-WOPT 32 a stiffening area is formed.

8. Plastic container (1) according to at least one of the preceding claims, characterized in that the deformation section (6) is arranged in the longitudinal direction (L) directly below the shoulder area (8) and / or the deformation section (6) is arranged in the longitudinal direction (L) directly above the base body (4).

9. Plastic container (1) according to at least one of the preceding claims, characterized in that the deformation section (6) has a smaller average cross-section than the base body (4) and / or the deformation section (6) has a larger average cross-section than the shoulder area and / or a section of the plastic container located above the deformation section has a larger or the same diameter as the deformation section (6).

10. Plastic container (1) according to at least one of the preceding claims, characterized in that the base body has a marking area (42) in which the base body has at least one marking and in which preferably a cross-section of the container is substantially constant in the longitudinal direction.

11. Plastic container (1) according to at least one of the preceding claims, characterized in that the plastic container has a first at least partially circumferential rib (62) in the deformation section (6), wherein preferably the first rib (62) has several rib sections (62a, 62b, 62c) which connect to each other in the circumferential direction of the deformation section.

12. Plastic container (1) according to claim 11, characterized in that the plastic container has at least a second, in particular a third, fourth and fifth circumferential rib (64) in the deformation section (6), wherein the second circumferential rib is located with respect to the longitudinal direction opposite the HANNKE BITTNER & PARTNER KNS01-1354-WOPT 33 first rib (62) is offset.

13. Plastic container according to at least one of the preceding claims, characterized in that the plastic container is closed with a container closure and / or contains nitrogen inside the container and / or the plastic container is provided with a container closure and this container closure remains connected to the plastic container via a connecting means even when the plastic container is open.

14. Molding tool, in particular blow mold for the production of a plastic container according to at least one of the preceding claims.

15. Method for forming plastic preforms (10) into plastic containers (1), wherein a plurality of forming stations (4) for forming the plastic preforms (10) into the plastic containers (20) are arranged on a movable carrier and these forming stations (4) are moved at least temporarily during the forming process along a predetermined transport path, wherein the forming stations (4) each have blow molding assemblies (6), wherein blow molding parts (62, 64) of these blow molding assemblies (6) are moved to open and close the blow molding assemblies (6), and in a closed state of the blow molding assembly (6) the plastic preforms (10) are formed into the plastic containers (20) by being supplied with a flowable medium in a cavity formed by the blow molding parts (62, 64), characterized in that at least one inner surface facing the plastic preform (10) of the Blow molded parts (62,64) forms a plastic container according to at least one of the preceding claims.

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