Testing apparatus and methods for testing containers

Abstract

A testing apparatus (16) has at least one sensor (26) for detecting foreign objects in a container (4a) to be tested. At least one sensor (26) and / or at least one carrier element (46) receiving the container (4a) are movable between a first arrangement and a second arrangement. In the first arrangement, the at least one sensor (26) is arranged at a distance from the container (4a) along a direction of movement (B). In the second arrangement, the at least one sensor (26) at least partially surrounds the container (4a).

Description

Background of the Invention

[0002] This invention relates to a testing apparatus, a packaging machine incorporating such a testing apparatus, and a method for testing containers for edible products, particularly medical or pharmaceutical products, food, or food supplements, for foreign objects, particularly metallic foreign objects.

[0003] Packaging machines that use edible products (such as medical or pharmaceutical products, food, or food supplements) to fill bottles and similar containers (generally referred to herein as containers), and packaging machines for closing the filled containers, are also referred to as bottle lines. In addition to filling units for filling containers and closing units for closing the filled containers, such bottle lines may also include supply units for desiccants and / or cotton balls. Bottle lines operating in a continuous or timed manner are known, wherein containers pass through the bottle line accordingly in a continuous or timed manner.

[0004] In packaging machines, there is a risk that foreign objects (such as metallic objects) may enter the container before it is closed. Containers containing such foreign objects must be reliably identified and must not be dispensed.

[0005] US 2015 / 0234075 A1 and US 2016 / 0291098 A1 disclose, for example, metal detectors configured in the shape of a tunnel and having a channel through which a conveyor belt for transporting a product to be tested is guided.

[0006] Such metal detectors are generally unsuitable for bottle lines that operate on a time-based basis, such as when containers are not being conveyed on a conveyor belt, and can be very expensive, contributing to the high cost of the entire bottle line. If the container cap or lid also contains a (metal) seal, X-ray equipment may be needed to test for metallic foreign objects in the container contents, which is also very costly. Summary of the Invention

[0007] The purpose of this invention is to provide a testing apparatus, packaging machine, and method that allows for simple and economical testing of foreign objects, particularly metallic foreign objects, in the contents of a container in a time-operated packaging machine.

[0008] According to one aspect of the invention, a testing apparatus for a packaging machine is provided for packaging edible products (particularly medical or pharmaceutical products, food, or food supplements) in containers (including conveying equipment). The apparatus is configured to convey multiple containers sequentially along a conveying direction in a conveying plane, and includes at least one sensor arranged in a testing area of ​​the apparatus, configured to detect foreign objects, particularly metallic foreign objects, in the containers to be tested among the multiple containers. At least one sensor and / or at least one carrier element of the testing apparatus is configured to be movable, through which the container to be tested is received in the testing area, such that relative movement between the at least one sensor and the container to be tested can be generated in a direction of movement between a first arrangement and a second arrangement, the direction of movement being perpendicular to the conveying plane. In the first arrangement, the sensor is arranged at a distance from the container to be tested along the direction of movement, and in the second arrangement, it at least partially surrounds the container to be tested.

[0009] This provides a testing device that allows for easy inspection of containers being transported in a timed manner in a packaging machine (e.g., on a bottle line) for foreign objects, particularly metallic ones.

[0010] Relative movement can occur between at least one sensor and the container under test along the direction of movement because either only at least one sensor is movable and at least one carrier element with the container under test is arranged as fixed in the test area, or at least one sensor is arranged as fixed and only at least one carrier element with the container under test is movable, or both at least one sensor and at least one carrier element with the container under test are movable. For a simple and economical structure, preferably, only at least one carrier element is configured to be movable.

[0011] Preferably, each of the multiple containers to be tested is filled with edible product in the test area. Specifically, each container is filled with a plurality of edible products, preferably between 10 and 200, more preferably between 10 and 150, and even more preferably between 10 and 120. Optionally, each container to be tested may be closed. Therefore, it is possible to prevent foreign objects from entering the containers after testing multiple containers with the testing device.

[0012] Generally speaking, edible products are preferably medical products, pharmaceutical products, food or food supplements.

[0013] Preferably, the edible product is a solid, such as a tablet, pill, or capsule. Edible products are preferably provided in loose form or as bulk material. This applies to both medical or pharmaceutical products (e.g., medicines) and foods and food supplements. Foods can be, for example, chewing gum, lozenges, drops, or the like. Food supplements are, for example, minerals, vitamins, fatty acids, etc., in powder, tablet, or capsule form.

[0014] The containers among multiple containers are configured to receive edible products in loose form. In other words, the containers are configured to receive edible products in the form of unpackaged, individually transportable, or bulk materials.

[0015] However, edible products can also be liquid products. One of the containers is then configured to directly receive the liquid product, meaning it is filled with liquid.

[0016] Therefore, packaging machines are configured to package the corresponding edible products into containers, particularly by directly filling and closing the containers with edible products.

[0017] At least one sensor can be a sensing sensor for detecting metallic foreign objects, and can be configured, for example, as a ring sensor. Such sensors are economical. This has a correspondingly positive impact on the cost of the testing apparatus and the packaging machine, respectively. Furthermore, these sensors can be easily integrated into the testing apparatus and the packaging machine, respectively, and have sufficiently high sensitivity and resolution to reliably detect even small metallic foreign objects.

[0018] Preferably, at least one sensor is configured to detect metallic foreign objects with a size between 0.5 and 25 mm, more preferably between 1.0 and 2.0 mm. In this case, the size may correspond to the diameter of a substantially spherical foreign object or the edge length of a substantially cuboid foreign object.

[0019] Particularly preferably, at least one sensor is configured to detect foreign objects formed from one or a combination of the following materials: iron, stainless steel, aluminum, brass, and non-ferrous metals.

[0020] Preferably, the sensitivity or responsiveness of at least one sensor is adjustable. In this way, the sensitivity of at least one sensor can be adjusted according to the product. In particular, the sensitivity of at least one sensor can be adjusted according to the characteristics of the product (e.g., moisture content or metal content). Therefore, it is possible to prevent containers without foreign objects from being incorrectly identified as faulty and rejected due to the characteristics of the product.

[0021] In one embodiment, at least one sensor includes a first potentiometer and a second potentiometer. The first potentiometer is configured to detect foreign objects, particularly metallic foreign objects, in the container under test. The second potentiometer is configured to identify the actual potential and transmit it to the control devices of the testing apparatus and the packaging machine, respectively.

[0022] Another advantage of having at least one sensor is that only a small, metal-free region is needed around it, which should be free of metallic objects to avoid interference from the at least one sensor. Preferably, the metal-free region is defined by a first distance parallel to the transport plane and a second distance perpendicular to the transport plane. The first distance is preferably between 0 mm and 100 mm, more preferably between 0 mm and 75 mm, and even more preferably between 0 mm and 50 mm. The second distance is preferably between 0 mm and 200 mm, more preferably between 0 mm and 150 mm, and even more preferably between 0 mm and 110 mm. The specified limits of these ranges are also included in this disclosure as the extreme values ​​of the first and second distances, respectively. Similarly, all intermediate values ​​of these specified ranges (particularly in whole millimeters) are intended to be included in this disclosure.

[0023] The conveying device is oriented parallel to the conveying plane. The conveying device and the conveying plane preferably extend substantially horizontally, independently of each other. The directions of movement are then substantially vertically aligned.

[0024] The conveying plane can be defined by a surface that conveys multiple containers along the conveying direction. For example, the surface is the surface of a conveyor table or conveyor belt. The conveying equipment can, for example, move multiple containers on a conveyor table through a testing device.

[0025] To achieve the simplest possible design of the testing apparatus, the relative movement between at least one sensor and at least one carrier element and the container under test between the first and second arrangements is oriented only along the direction of movement. The relative movement between the first and second arrangements does not point in a direction different from the direction of movement. Specifically, no relative movement between the first and second arrangements along the transport direction occurs between the at least one sensor and at least one carrier element and the container under test.

[0026] The containers in a plurality of containers are known containers that can be closed by a lid and are intended for receiving edible products of the type described herein. Each container has a bottom, peripheral walls, and a neck. The neck forms an opening through which the product can be filled and removed from the container. The lid is preferably pressed or screwed onto the container; in the latter case, the neck has threads that engage with the lid. However, the lid can be connected to the container, particularly to the neck of the latter, with any desired force or form fit. The containers can be made of plastic or glass.

[0027] In all embodiments described herein, the container among a plurality of containers is preferably configured as a bottle. All features described herein with respect to a container also apply to a bottle. Therefore, for this preferred embodiment, the term "bottle" can be readily used synonymously with the term "container." Containers similar to bottles, such as ampoules, capillaries, or vials, are also included herein by the general term bottle. This also applies to closable (plastic) containers or bottles, such as those known in the food and food supplement industry.

[0028] Each of the multiple containers is preferably configured to be rotationally symmetrical about a centerline. The centerline is preferably arranged to be perpendicular to the transport plane and parallel to the direction of movement, at least in the test area. The container to be tested can be placed on a carrier element located at its bottom in the test area.

[0029] Preferably, the diameter of each of the multiple containers can be between 20 mm and 1000 mm, more preferably between 25 mm and 77 mm.

[0030] The height of the containers in a multi-container configuration is preferably between 40mm and 200mm.

[0031] In a preferred embodiment, at least one sensor is formed as a ring, for example, as a (sensing) ring sensor or ring detector, as already described. The at least one ring sensor has an opening into which the container to be tested can be introduced, and it preferably forms a channel. The inner circumference of the at least one sensor corresponds to the inner circumference of the opening and can be adapted to the shape of the container to be tested. Preferably, the inner circumference of the at least one sensor, the inner circumference of the opening, and the container to be tested are configured as substantially cylindrical. The at least one ring sensor then has a ring shape. However, other geometries are also possible.

[0032] The inner diameter of at least one annular sensor corresponds to the diameter of the opening and is larger than the diameter of the plurality of containers. Preferably, the inner diameter of at least one sensor and the diameter of the opening are between 20 mm and 100 mm, respectively.

[0033] In the case of a channel, the height of at least one sensor substantially corresponds to the depth of the opening along its axial direction. The height of at least one sensor or the depth of the opening may be less than the height of the multiple containers. Then, during the relative movement between at least one sensor and the container under test, at least one detector detects the foreign object.

[0034] In the second arrangement, if at least one sensor completely surrounds the container under test in the circumferential direction, particularly reliable identification of foreign objects can be achieved. Preferably, one sensor precisely surrounds one container in each case. This can be achieved in a particularly simple manner using the ring sensor already described, although it can also be achieved using other sensors.

[0035] Furthermore, the testing apparatus preferably includes an actuator configured to generate relative movement between at least one sensor and at least one carrier element. Particularly preferably, the actuator is connected to at least one carrier element and configured to move at least one carrier element parallel to the direction of movement. The actuator may be an electric actuator, an electromagnetic actuator, a hydraulic actuator, a pneumatic actuator, or a mechanical actuator.

[0036] In one embodiment, at least one carrier element may have a gripper configured to hold the container to be tested and move it relative to at least one sensor. The gripper may hold the container to be tested from above, below, or from the side of the peripheral wall. Alternatively, the gripper may hold the container to be tested on the neck or lid from above or from the side, in case the latter has been applied.

[0037] In a particularly preferred embodiment, the containers to be tested are respectively arranged in test areas on a carrier element. At least one carrier element is then configured to support the containers to be tested from below within the test areas and is movable along the direction of movement. In this case, at least one carrier element can be configured and installed particularly simply. At least one sensor is then preferably arranged as fixed to allow for a simple and economical structure of the testing apparatus. However, at least one sensor may also be movable.

[0038] Preferably, the contact surface of at least one carrier element (on which the container to be tested is disposed) lies within the transport plane in the first arrangement but not in the second arrangement. For example, the container may stand upright with its bottom on the contact surface. In this way, the container to be tested can be placed on the carrier element as easily as possible by a transport device so that it can be subsequently supplied to the sensor through the carrier element. The contact surface is preferably arranged parallel to the transport plane, particularly in the first and second arrangements, and preferably in all positions between the first and second arrangements.

[0039] At least one carrier element may include a suction device for holding the container on the contact surface. For this purpose, the contact surface may have at least one opening that is fluidly connected to a vacuum source.

[0040] For example, the conveyor has an opening in which at least one carrier element is arranged in a first arrangement. The inner circumferential shape of the opening then corresponds to the outer circumference of the at least one carrier element. Thus, a container can be easily arranged on the at least one carrier element and moved from the first arrangement to the second arrangement.

[0041] If at least one carrier element is configured to be movable along the direction of movement, in the first embodiment, at least one sensor may be arranged below the transport plane, and at least one carrier element may descend relative to the transport plane. In the second embodiment, at least one sensor is arranged above the transport plane, and at least one carrier element may rise relative to the transport plane.

[0042] In the first embodiment, at least one carrier element can be mounted, for example, by means of a preload element (e.g., a spring), and is preferably preloaded to a position where the contact surface lies within the transport plane. The actuator is then preferably arranged and configured such that it acts against the preload force of the preload element, for example, via a plunger, on the at least one carrier element or the container to be tested. For this purpose, the preload element can be arranged below and connected to the at least one carrier element, and the actuator with the plunger is arranged above the at least one carrier element and the container to be tested. The actuator can move the container and at least one carrier element into a second arrangement along the direction of movement via the plunger (particularly by downward pressing).

[0043] Alternatively, the actuator may be securely connected to at least one carrier element such that the actuating motion of the actuator is directly transmitted to at least one carrier element. For example, the actuator may be arranged below at least one carrier element and configured to move at least one carrier element upward and downward parallel to the direction of movement. The second embodiment may also be implemented in this manner.

[0044] In an exemplary embodiment, at least one carrier element is movably mounted on a linear guide that extends parallel to the direction of movement. The at least one carrier element can then be moved along the linear guide by an actuator. For example, the actuator is configured as a servo motor and drives the at least one carrier element via a belt driver, or a connecting element that couples the at least one carrier element to the linear guide. Advantageously, the acceleration of the carrier element can be precisely adjusted by a servo motor, thereby preventing the product from falling out of the container, for example, while the container remains open. However, it is also conceivable to move the at least one carrier element by a spindle driver, a hydraulic or pneumatic cylinder driver, or an alternative driver.

[0045] In both the first and second embodiments, at least one sensor is preferably mounted in a fixed position, such as on the frame or housing of the testing device or packaging machine.

[0046] Alternatively, at least one sensor may be movable. In this case, at least one carrier element is preferably fixed, making a simple structure of the testing apparatus possible. For example, at least one carrier element is formed by a conveyor, the surface of which defines a conveyor plane. At least one sensor may be arranged above the conveyor plane and may descend parallel to the direction of movement.

[0047] To improve the efficiency of the testing apparatus, the testing apparatus particularly preferably includes multiple sensors and multiple carrier elements. The multiple sensors include at least one of the aforementioned sensors. Each of the multiple sensors can be configured based on at least one sensor such that all features described herein with respect to at least one sensor are similarly applied to the multiple sensors. The multiple carrier elements include at least one of the aforementioned carrier elements. Each of the multiple carrier elements can be configured based on at least one carrier element such that all features described herein with respect to at least one carrier element are similarly applied to the multiple carrier elements.

[0048] Preferably, each of the plurality of sensors is configured to accurately detect foreign objects in a container. Each of the plurality of carrier elements preferably receives one of the plurality of containers accurately. Therefore, it is preferable to assign one carrier element to each sensor.

[0049] For example, the testing apparatus includes at least one additional sensor arranged in a separate testing area of ​​the testing apparatus and configured to detect foreign objects, particularly metallic foreign objects, in a separate container among a plurality of containers. The at least one additional sensor and / or at least one additional carrier element (through which the separate container is received in the separate testing area) of the testing apparatus is configured to be movable, such that relative movement between the at least one additional sensor and the separate container can be generated in a direction of movement between a first arrangement and a second arrangement. In the first arrangement, the at least one additional sensor is arranged at a distance from the separate container along the direction of movement, and in the second arrangement, the at least one additional sensor at least partially surrounds the separate container. Therefore, the testing apparatus includes a plurality of sensors comprising at least one sensor and at least one additional sensor for testing a plurality of containers, comprising at least one container and at least one separate container.

[0050] Preferably, multiple sensors are arranged sequentially along the conveying direction.

[0051] Preferably, multiple carrier elements are arranged sequentially along the conveying direction. Therefore, one carrier element can be assigned to each sensor.

[0052] Multiple containers can be conveyed in rows via a testing device (particularly via the entire packaging machine), the rows being arranged parallel to the conveying direction. It is also conceivable that multiple containers can be moved separately in multiple parallel rows via the testing device and the packaging machine.

[0053] Multiple sensors can be configured to simultaneously test multiple containers within multiple containers. To this end, multiple sensors and / or multiple carrier elements can be configured to be movable, such that the relative movement between the multiple sensors and the containers under test occurs synchronously.

[0054] In a particularly preferred embodiment, one of the multiple carrier elements may descend relative to the transport plane. The carrier elements may be connected to each other so that they can move synchronously. In this case, multiple sensors are arranged below the transport plane, preferably fixed.

[0055] Not all carrier elements among multiple carrier elements need to move synchronously with each other or be connected to each other. It is also conceivable that a group of carrier elements (which does not include all carrier elements) can move synchronously separately and preferably be connected to each other.

[0056] For example, a group of carrier elements is mounted on a common connection element. The connection element can also connect a group of carrier elements to a linear guide, as described above. Similarly, multiple carrier elements can be mounted onto a common connection element.

[0057] To prevent the sensors from interfering with each other, it is further preferred that at least two of the multiple sensors are capable of operating at different frequencies. More precisely, the first sensor of the multiple sensors operates at a first frequency, while the second sensor of the multiple sensors operates at a second frequency different from the first frequency. The frequency of each sensor is preferably predefined so that it cannot be changed by the operator of the packaging machine. In particular, two sensors of the multiple sensors (arranged adjacent to each other along the conveying direction) can operate at different frequencies.

[0058] All features described regarding the sensor, the container under test (UTC), and the carrier element are applied in a similar manner to at least one additional sensor, at least one additional UTC, and at least one additional carrier element, and therefore to all sensors, UTCs, and carrier elements described herein. For simplicity of reference and clarity of description, regardless of the actual number of sensors, the sensor is referred to herein as a first sensor, the UTC as a first container, and the carrier element as a first carrier element. In the case of multiple sensors, the additional sensor may also be referred to as a second sensor, the additional UTC as a second container, and the additional carrier element as a second carrier element. Similarly, the test apparatus may include at least one third sensor, at least one third UTC, and at least one third carrier element, etc.

[0059] Preferably, the relative movements between the plurality of sensors and the corresponding containers in the plurality of test containers occur parallel and simultaneously between the respective first arrangement and the respective second arrangement. That is, the movement direction of each pair of sensors and the corresponding test container in the plurality of test containers is aligned parallel to the movement direction of the first sensor and the first container.

[0060] According to another aspect of the invention, a packaging machine for packaging edible products (particularly medical or pharmaceutical products or food or food supplements) in containers comprises: a supply unit (configured to supply a plurality of containers to the packaging machine), a filling unit (configured to fill the plurality of containers with the edible product), a closing unit (configured to close the plurality of containers with lids respectively), and a testing device according to an embodiment of the invention (for testing foreign objects, particularly metallic foreign objects, in the plurality of containers).

[0061] In this way, a packaging machine is provided that can easily test whether there are foreign objects, especially metal foreign objects, in containers that are conveyed in a timed manner during the packaging process.

[0062] The packaging machine may also include a desiccant feeder configured to supply desiccant to multiple containers, and a separate cotton ball feeder (also known as a cotton swab feeder) configured to supply cotton balls to multiple containers.

[0063] The supply unit is arranged in front of the filling unit, while the closing unit is arranged behind the filling unit. A desiccant supplier (if present) is preferably arranged between the supply unit and the filling unit. A cotton ball supplier (if present) is preferably arranged between the filling unit and the closing unit.

[0064] By moving multiple containers along the conveying direction in the conveying plane of the packaging machine, particularly between the supply unit, filling unit, and closing unit, and preferably within the entire packaging machine, a packaging machine structure that is as simple and compact as possible can be achieved.

[0065] The conveying device of the testing apparatus is preferably configured to convey multiple containers in a timed manner through the filling unit, the closing unit, and the testing apparatus, and optionally through the entire packaging machine. The conveying device may comprise multiple conveying elements, which preferably move synchronously with each other.

[0066] The packaging machine can be configured as a bottle line, which integrates all the necessary units, feeders, and (testing) devices. Containers from multiple containers are then formed from bottles, as already described.

[0067] The conveyor can extend through the entire packaging machine, so that multiple containers or bottles are conveyed on the conveyor through at least a plurality of units, feeders and (testing) devices described herein, and preferably through all units, feeders and (testing) devices of the bottle line.

[0068] In principle, the testing device can be integrated into at least one of the supply, filling, or closing units of the packaging machine, or into at least one of the desiccant or cotton swab feeders. Alternatively, the testing device can be arranged downstream of one of the supply, filling, or closing units or the desiccant or cotton swab feeder along the conveying direction. In this case, the testing device forms a separate module of the packaging machine.

[0069] It is also conceivable that the packaging machine includes multiple testing devices, in which case each of the multiple testing devices can be configured or arranged according to one of the variables mentioned above.

[0070] If the testing device is integrated into the filling or closing unit, a particularly space-saving structure for the packaging machine can be achieved. The testing device, if present, can also be integrated into the cotton ball feeder.

[0071] The advantage of integrating the test apparatus into the closure unit, as well as the test apparatus also positioned downstream of the closure unit, is that the container is closed immediately after testing or during testing. This minimizes or eliminates the risk of contamination of the container contents with foreign matter after testing.

[0072] The test device can be integrated into the filling or closing unit, for example, as follows.

[0073] In a preferred embodiment, the filling unit includes a plurality of filling devices, each configured to fill one of a plurality of containers, and arranged at intervals from each other along the conveying direction. Sensors of the testing apparatus are then arranged along the conveying direction between two adjacent filling devices. If the testing apparatus includes multiple sensors, each sensor is arranged downstream of one of the filling devices. Alternatively, a sensor, or each of a plurality of sensors, may be arranged upstream of the filling devices.

[0074] Additionally or alternatively, the closing unit comprises multiple closing devices, each configured to close one of a plurality of containers, and arranged at intervals from each other along the conveying direction. Sensors of the testing apparatus are then arranged along the conveying direction between two adjacent closing devices. If the testing apparatus comprises multiple sensors, each sensor is arranged downstream of one of the closing devices. Alternatively, a sensor, or each of multiple sensors, may be arranged upstream of the closing device.

[0075] Additionally or alternatively, the cotton ball dispenser includes multiple dispensing devices, each configured to dispense cotton balls into one of a plurality of containers, and arranged at intervals along the conveying direction. Sensors for the testing device are then arranged along the conveying direction between two adjacent dispensing devices. If the testing device includes multiple sensors, each sensor is arranged downstream of one of the dispensing devices. Alternatively, the sensor, or each of the multiple sensors, may be arranged upstream of the dispensing device. This also applies to desiccant dispensers.

[0076] As previously mentioned, alternatively, the testing device can be configured substantially independently of other units or feeders of the packaging machine, and, for example, form a separate module of the packaging machine. This increases the flexibility of the testing device's placement within the packaging machine and allows for a smaller number of variations of the unit or feeder, which in turn allows for cost reduction.

[0077] The testing device may be arranged, for example, between the filling unit and the closing unit, or, if present, between the cotton ball feeder and the closing unit. Particularly preferably, the testing device is arranged before the closing unit, particularly between the filling unit and the closing unit.

[0078] In one embodiment, the testing device may be positioned behind the closing unit, i.e., downstream of the closing unit, along the conveying direction. This ensures that the already filled containers can no longer receive foreign objects, as they have been closed during testing.

[0079] According to another aspect of the invention, a method for testing containers of edible products (particularly medical or pharmaceutical products, food, or food supplements) comprises the following steps:

[0080] a) Supplying multiple containers along the conveying direction within the conveying plane in a timed manner;

[0081] b) In a first arrangement, one of a plurality of containers is placed in a test area relative to at least one sensor used for detecting foreign objects (particularly metallic foreign objects), and the at least one sensor is arranged at a distance from the container to be tested in the first arrangement along a direction of movement, the direction of movement being perpendicular to the transport plane.

[0082] c) A first relative movement is generated between the container under test and at least one sensor along the direction of movement, from a first arrangement to a second arrangement, wherein at least one sensor at least partially surrounds the container under test;

[0083] d) Test the container by detecting whether it contains foreign objects using at least one sensor;

[0084] e) A second relative movement parallel to the direction of movement is generated between the tested container and at least one sensor, returning to the first arrangement; and

[0085] f) Supply the tested container from the test area, preferably along the conveying direction in the conveying plane.

[0086] This provides a method for easily testing containers being transported in a timed manner in a packaging machine (e.g., a bottle line) for foreign objects, especially metallic ones.

[0087] Unless otherwise stated, all steps of the methods shown herein are preferably performed in the prescribed order.

[0088] The method is preferably implemented using a testing device or a packaging machine. Therefore, all features described regarding the testing device and packaging machine are applicable to this method in a similar manner, and vice versa.

[0089] Steps b) through f) are each implemented for a container, for example, for the first container. According to step d), by testing the container to be tested, the container to be tested becomes the tested container, but it is still the same container, for example, the first container.

[0090] Preferably, the method includes repeating steps b) to f) for additional containers to be tested among a plurality of containers.

[0091] If multiple sensors are provided, the method may include performing steps b) through f) simultaneously on multiple containers to be tested in multiple containers. For example, steps b) through f) may be performed simultaneously on the first, second, and third containers.

[0092] Step d) can be performed when at least one sensor and the container under test are arranged in the second arrangement and / or during the first relative movement in step c) and / or during the second relative movement in step e).

[0093] The first relative movement according to step c) preferably comprises lowering the container under test relative to the transport plane, wherein at least one sensor is arranged below the transport plane. Alternatively, the first relative movement according to step c) comprises raising the container under test relative to the transport plane, wherein at least one sensor is arranged above the transport plane. In both cases, at least one sensor can be arranged to be fixed in order to allow for a simple structure of the testing apparatus. The lowering or raising of the container under test can be performed particularly simply, for example, by passing it through at least one carrier element of the testing apparatus.

[0094] Additionally or alternatively, the generation of the first relative movement according to step c) may include raising or lowering at least one sensor relative to the transport plane, wherein lowering at least one sensor is preferred due to its simpler implementation. This at least one sensor is then positioned above the transport plane. The container to be tested is preferably positioned stationary.

[0095] The second relative movement is always the opposite of the first relative movement.

[0096] Steps a), b), and f) are preferably performed via a transfer device of the testing apparatus. Steps c) and e) are preferably performed via at least one sensor and / or at least one carrier element of the testing apparatus.

[0097] The method may also include filling multiple containers, preferably performed via a filling unit of a packaging machine. The method may also include closing multiple containers, preferably performed via a closing unit of a packaging machine. Optionally, the method may include supplying a desiccant to each of the multiple containers (preferably via a desiccant supplier), and / or supplying cotton balls to each of the multiple containers (preferably via a cotton ball supplier).

[0098] Steps b) through f) are preferably performed after filling or after closing the container to be tested.

[0099] If the sensitivity of at least one sensor is adjustable, the method preferably further includes the following steps:

[0100] The sensitivity of at least one sensor is adjusted according to the characteristics of the edible product (especially the edible product).

[0101] This prevents containers without foreign objects from being incorrectly identified as errors and rejected, as previously stated. Attached Figure Description

[0102] Figure 1 A packaging machine including a testing device according to a first embodiment is schematically shown.

[0103] Figure 2a , 2b The test apparatus according to the second embodiment is schematically shown, which is arranged in a first arrangement and a second arrangement.

[0104] Figures 3a-3c Various embodiments of the carrier element of the test apparatus are schematically illustrated.

[0105] Figure 4 The details of the test apparatus are shown in perspective view. Detailed Implementation

[0106] Figure 1A side view of a packaging machine 2 according to an embodiment of the present invention is schematically shown for packaging an edible product (not shown) into a container 4. Specifically, the packaging machine 2 is configured as a bottle line, comprising all the basic units, feeders, and devices for packaging the edible product into the container 4, which are configured as bottles. However, it should be understood that this disclosure is not limited to bottle lines and containers 4 configured as bottles, but is generally applicable to packaging machines 2 for corresponding containers 4.

[0107] The packaging machine 2 includes a supply unit 6 (configured to supply a plurality of containers 4 to the packaging machine 2), a filling unit 8 (configured to fill the plurality of containers 4 with edible product), and a closing unit 10 (configured to close the plurality of containers 4 with lids 5 respectively). Optionally, the packaging machine 2 also includes a desiccant supplier 12 (configured to supply desiccant to the plurality of containers 4) and a cotton ball supplier 14 (configured to supply cotton balls to the plurality of containers 4). Finally, the packaging machine 2 also includes a testing device 16, configured to test the plurality of containers 4 for foreign objects, particularly metallic foreign objects.

[0108] The testing apparatus 16 includes a conveying device 18 configured to move a plurality of containers 4 through the testing apparatus 16 in a timed manner along a conveying direction F within a conveying plane 20. The conveying direction F extends parallel to the conveying plane 20. Preferably, the conveying direction F and the conveying plane 20 are horizontally oriented. The conveying plane 20 may be defined, for example, by the surface of a conveyor table 22 on which the plurality of containers 4 are conveyed through the testing apparatus 16.

[0109] The conveyor 18 engages with each of the plurality of containers 4, preferably by means of a shape fit, such as Figure 1 The retaining element 24 is shown in the diagram. For example, the conveying device 18 is a track that extends substantially parallel to the conveying direction F, and protrusions are applied to or formed thereon as retaining elements 24. Such a conveying device 18 is also referred to as a "rake". Suitable alternative conveying devices are known to those skilled in the art.

[0110] The supply unit 6, filling unit 8, and closing unit 10 are arranged in this order following each other along the conveying direction F, with the purpose of first filling and then closing the container 4 being supplied. The desiccant supplier 12 is preferably arranged along the conveying direction F between the supply unit 6 and the filling unit 8, and the cotton ball supplier 14 is preferably arranged along the conveying direction F between the filling unit 8 and the closing unit 10, although they can also be arranged in other locations to accommodate existing needs. It is also conceivable that the packaging machine 2 may include additional units or processing stations.

[0111] Particularly advantageously, the conveying device 18 is configured to convey not only the plurality of containers 4 through the testing device 16, but also through the packaging machine 2, preferably through the entire packaging machine 2. In the illustrated embodiment, the plurality of containers 4 are conveyed by the conveying device 18 from the supply unit 6 through the desiccant supplier 12, the filling unit 8, the cotton ball supplier 14, the closing unit 10, and the testing device 16 within the conveying plane 20. Accordingly, the conveyor 22 can extend through the entire packaging machine 2, that is, from the supply unit 6 to the closing unit 10 and the testing device 16, and optionally beyond the latter.

[0112] When multiple containers 4 move through the units and devices of the packaging machine 2 within the conveying plane 20 and along the conveying direction F throughout the entire packaging machine 2, a particularly space-saving structure of the packaging machine 2 can be obtained.

[0113] In the illustrated embodiment, the testing device 16 is arranged behind the closing unit 10 along the conveying direction F, that is, downstream of the closing unit 10. The advantage of this is that the closed container 4 is tested by the testing device 16. After testing, the contents of the container 4 are no longer likely to be contaminated by foreign matter. In this case, the testing device 16 can be configured as a separate module of the packaging machine 2.

[0114] The testing device 16 can also be arranged in another location within the packaging machine 2, for example, along the conveying direction F after the filling unit 8 or the cotton ball feeder 14, and thus along the conveying direction F between the respective unit and the subsequent unit. Similarly, the packaging machine 2 can have multiple testing devices 16 in different locations. Figures 2a-2b Figures 3a-3c further illustrate embodiments in which the testing device 16 is integrated into a unit of the packaging machine 2, particularly into the filling unit 8, the cotton ball feeder 14, or the closing unit 10, as described below with reference to these figures.

[0115] like Figure 1 As shown, the testing device 16 includes at least one sensor 26, which is arranged in the testing area 28 of the testing device 16 and configured to detect foreign objects, particularly metallic foreign objects, in the test container 4a among a plurality of containers 4.

[0116] The testing apparatus 16 may also include multiple sensors. Sensor 26 is therefore referred to as first sensor 26, test area 28 as first test area 28, and container 4a to be tested as first container 4a. In addition to the first sensor, the multiple sensors here also include at least one other sensor, such as a second sensor 30, which is arranged in the second test area 32 and configured to detect foreign objects in the second container 4b to be tested, and a third sensor 34, which is arranged in the third test area 36 and configured to detect foreign objects in the third container 4c to be tested. Therefore, the multiple sensors include first, second, and third sensors 26, 30, and 34. The multiple sensors 26, 30, and 34 are preferably arranged sequentially along the conveying direction F. The multiple sensors 26, 30, and 34 can be configured to simultaneously test containers 4a, 4b, and 4c to be tested, which are the first, second, and third containers 4a, 4b, and 4c.

[0117] The first sensor 26 or multiple sensors 26, 30, 34 (if present) may be arranged above the conveying plane 20. Preferably, multiple sensors 26, 30, 34 are arranged below the conveying plane 20, such as... Figure 1 As shown by the dashed lines, these are used for the first, second, and third sensors 26', 30', and 34', and... Figure 4 It is shown in more detail below.

[0118] In addition, from Figure 1 As can be seen, the units 8 and 10 of the packaging machine 2, the feeders 12 and 14, and the testing device 16 are preferably configured to fill, close, and test most of the containers 4 in order to improve the efficiency of the packaging machine 2.

[0119] For example, filling unit 8 includes a plurality of filling devices 38, each configured to fill one of the plurality of containers 4, and arranged at a distance from each other along the conveying direction F. Closing unit 10 may include a plurality of closing devices 40, each configured to close one of the plurality of containers 4, and arranged at a distance from each other along the conveying direction F. If present, desiccant supply 12 may include a plurality of first supply devices 42 and cotton ball supply 14 may include a plurality of second supply devices 44, the plurality of first supply devices 42 and the plurality of second supply devices 44 being respectively configured to supply desiccant or cotton balls into the containers 4 of the plurality of containers, and arranged at a distance from each other along the conveying direction F.

[0120] For the cyclic operation of packaging machine 2, it is advantageous that the number of filling device 38, closing device 40, first supply device 42, second supply device 44, and sensors 26, 30, 34 corresponds to the same predetermined quantity. In the example shown, the predetermined quantity is three, thus providing devices 38, 40, 42, 44 and three sensors 26, 30, 34 respectively. In each cycle of packaging machine 2, three of the plurality of containers 4 are therefore processed at each unit 8, 10, at the feeders 12, 14, or at the testing device 16 of packaging machine 2.

[0121] Figure 2a , Figure 2b An exemplary embodiment is shown, in which the testing device 16 is integrated into the filling unit 8, the closing unit 10, the desiccant supplier 12, or the cotton ball supplier 14. For ease of illustration, Figure 2a and 2b This indicates all the positions occupied by container 4. It should be understood that, in particular, the number, spacing, and cycle of containers 4 can be adapted to their respective existing needs in any desired manner.

[0122] If the testing device 16 (and thus the first sensor 26 or multiple sensors 26, 30, 34) is integrated into one of the units 8, 10 or feeders 12, 14, the first sensor 26 is preferably arranged along the conveying direction F between two adjacent devices 38, 40, 42, 44 of each unit 8, 10 or feeder 12, 14. In the case of multiple sensors 26, 30, 34, each sensor 26, 30, 34 is preferably arranged upstream or downstream of one of these devices 38, 40, 42, 44. The spacing of the devices 38, 40, 42, 44 of each unit 8, 10 or feeder 12, 14 along the conveying direction should also be adapted to their respective existing needs. Thus, for example, one or more containers may be arranged between adjacent devices.

[0123] In all embodiments described herein, the first sensor 26 and / or carrier element 46 (through which the first test container 4a is received in the test area 28, and is therefore also referred to as the first carrier element 46) of the test apparatus 16 are configured to be movable such that relative movement between the first sensor 26 and the first test container 4a can occur along a movement direction B between a first arrangement and a second arrangement. The movement direction B is oriented perpendicular to the transfer plane 20. In the first arrangement, the first sensor 26 is arranged along the movement direction B at a distance from the first test container 4a, and in the second arrangement, it at least partially surrounds the first test container 4a. If multiple sensors 26, 30, 34 are provided, the described relationship applies to each of the multiple sensors 26, 30, 34 and the corresponding test containers 4a, 4b, 4c.

[0124] The relative movement between the first sensor 26 and the first test container 4a can be generated in various ways. Optionally, only the first sensor 26 can be movable to generate relative movement between the first arrangement and the second arrangement, while the first carrier element 46 with the first test container 4a is fixedly arranged in the first test area 28. For example, in Figure 1 In some embodiments, this is possible, wherein a first sensor 26 or multiple sensors 26, 30, 34 may be mounted in the testing device 16 so as to be movable along the direction of movement B. Multiple sensors 26, 30, 34 may be arranged in a first arrangement above the containers 4a, 4b, 4c to be tested, and move downwards along the direction of movement B into a second arrangement until the sensors 26, 30, 34 surround the containers 4a, 4b, 4c. The first carrier element 46 and the second carrier element 48 (through which the second container 4b is received) and the third carrier element 50 (through which the third container 4c is received) may in this case form part of the conveyor 22, or in particular, may be integrally formed with the conveyor 22. In embodiments where the testing device 16 is integrated into one of the units 8, 10 or feeders 12, 14 of the packaging machine 2, as... Figure 2a , Figure 2b and Figure 3a , Figure 3b , Figure 3c As shown, the first sensor 26 or multiple sensors 26, 30, 34 can also be movable, and the test containers 4a, 4b, 4c can be fixedly arranged respectively.

[0125] Alternatively, relative movement can be generated by the fixed arrangement of the first sensor 26 or multiple sensors 26, 30, 34, and only the corresponding carrier elements 46, 48, 50 and therefore the corresponding test containers 4a, 4b, 4c are movable. See below for reference. Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 3c and Figure 4 Exemplary embodiments thereof have been described, and can be similarly applied to them. Figure 1 The testing device 16 is configured independently of the other components 8, 10 and feeders 12, 14 of the packaging machine 2. For clear reasons, Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 3c and Figure 4 The transmission device 18 is not shown in the image.

[0126] In another alternative, both the first sensor 26 and the first carrier element 46 with the first test container 4a can be configured to be movable. This also applies to multiple sensors 26, 30, 34 and multiple carrier elements 46, 48, 50. Since this alternative is a combination of two other possibilities for generating relative movement between the first sensor 26 and the first test container 4a, it is not described in detail separately.

[0127] Figure 2a Multiple containers to be tested 4a, 4b, 4c and multiple sensors 26, 30, 34 in the corresponding first arrangement are shown, while Figure 2b The diagram shows multiple test containers 4a, 4b, 4c and multiple sensors 26, 30, 34 in the corresponding second arrangement. The features described below with reference to the first sensor 26, the first container 4a and the first carrier element 46 are applied in a similar manner to the second sensor 30, the second container 4b and the second carrier element 48, as well as the third sensor 34, the third container 4c and the third carrier element 50.

[0128] The first carrier element 46 is movably mounted along the moving direction B, and the first sensor 26 can, in principle, be arranged above or below the conveying plane 20. (See reference) Figures 3a-3c Various examples of this installation are described. In a first embodiment, when the first sensor 26 is arranged below the transport plane 20, the first carrier element 46 can be lowered relative to the transport plane 20, such as... Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 3c and 4 As shown. However, in the second embodiment, when the first sensor 26 is arranged above the transfer plane 20, the first carrier element 46 can also rise relative to the transfer plane 20, as shown. Figure 1 and 3c As shown.

[0129] In the first test area 28, the first container 4a is arranged on the first carrier element 46, which preferably forms a plane with the conveyor table 22 in the first arrangement. Preferably, the first carrier element 46 has a contact surface 52 on which the first container 4a stands. In the first arrangement ( Figure 2a In the second arrangement, the contact surface 52 is located within the conveying plane 20, while in the second arrangement ( Figure 2b In this context, the contact surface 52 is not located within the conveying plane 20. Preferably, the contact surface 52 is always aligned parallel to the conveying plane 20.

[0130] If the first container 4a to be tested and the first sensor 26 are arranged relative to each other in the test area 28 in the first arrangement, then relative movement between the first container 4a and the first sensor 26 can be generated along the movement direction B, such as... Figure 2b As shown. This relative movement is also referred to as the first relative movement. In this case, the first carrier element 46 moves the first container 4a from the first arrangement to the second arrangement, wherein the first sensor 26 at least partially surrounds the first container 4a. Preferably, the first sensor 26 is configured as a ring sensor and, in the second arrangement, completely surrounds the first container 4a along its circumference.

[0131] During the first relative movement from the first arrangement to the second arrangement, and / or in the second arrangement, the first sensor 26 detects whether the first container 4a contains foreign objects, and thus tests for foreign objects in the container 4a.

[0132] Once the first container 4a has been tested, a relative movement (also referred to as a second relative movement) can be generated between the first container 4a under test and the first sensor 26, parallel to the direction of movement B back to the first arrangement. Figure 2a In this case, the first carrier element 46 moves the first container 4a from the second arrangement to the first arrangement, such that the first sensor 26 is again positioned at a certain distance from the first container 4a. The first container 4a can then be conveyed out of the first test area 28 to allow for the testing of another container 4 among a plurality of containers 4 by the first sensor 26 in the next cycle.

[0133] like Figure 2a As shown, each container 4 typically has a bottom 401, a peripheral wall 402, and a neck 403. The neck 403 forms an opening 404 in the container 4, through which the container 4 can be filled with edible products and removed from the container. The lid 5 (see...) Figure 1 The neck 403 is preferably pressed or screwed onto the container 4, in which case it has threads that engage with the threaded connection of the cap 5. Each of the plurality of containers 4 is preferably configured rotationally symmetrically about a centerline 405. The centerline 405 is preferably oriented perpendicular to the transfer plane 20 and parallel to the direction of movement B, at least in the test area 28. Furthermore, each of the plurality of containers 4 has a diameter D, which is preferably measured in the area of ​​the peripheral wall 402, particularly in the area of ​​the maximum diameter of the peripheral wall 402. The height H of each container 4 is preferably defined parallel to the centerline 405 of the container 4, from the bottom 401 to the upper edge of the neck 403. Such a container may also be referred to as a bottle.

[0134] Figures 3a to 3c 4 and 4 represent various possibilities for the movable mounting of at least the first carrier element 46. Figures 3a to 3cDetails of the testing apparatus 16 and the packaging machine 2 are shown respectively, wherein the first sensor 26, the first container 4a, and the first carrier element 46 are arranged in a second configuration. It should be understood that... Figures 3a to 3c In each embodiment, the first sensor 26, the first container 4a, and the first carrier element 46 can all be coupled with Figure 2a A similar arrangement is used in the first arrangement. Furthermore, Figures 3a to 3c The possibility of movably mounting the first carrier element 46, as shown, can be applied in a similar manner to embodiments where the test apparatus 16 is configured independently, for example... Figure 1 As shown in the image.

[0135] Furthermore, the possibilities shown can be applied in a similar manner to multiple sensors 26, 30, 34, multiple test containers 4a, 4b, 4c, and multiple carrier elements 46, 48, 50.

[0136] exist Figures 3a to 3c In all embodiments, the test apparatus 16 includes an actuator 54 which is connected to or acts on the first carrier element 46 and is configured to move the first carrier element 46 parallel to the direction of movement B.

[0137] exist Figure 3a In this embodiment, the first carrier element 46 is pre-tightened by a pre-tightening element 56 to a position where the first contact surface 52 is located within the transfer plane 20. The pre-tightening element 56 may be a spring element, such as a compression spring. The actuator 54 may be a hydraulic or pneumatic actuator, such as a hydraulic cylinder or pneumatic cylinder, or an electric, electromagnetic, or mechanical linear actuator. The actuator 54 is arranged and configured such that it acts on the first carrier element 46, or on the first container 4a, as shown, overcoming the pre-tightening force of the pre-tightening element 56 via a plunger 58. More precisely, the pre-tightening element 56 may be arranged below and connected to the first carrier element 46 for this purpose, and the actuator 54 with the plunger 58 may be arranged above the first carrier element 46 and the first test container 4a. If the plunger 58 moves downward along the direction of movement B via the actuator 54, the plunger 58 impacts the first container 4a and presses it downward from the first arrangement into the second arrangement together with the first carrier element 46. During this first relative movement, the first carrier element 46 and the first container 4a are at least partially moved past the first sensor 26. If the test device 16 is integrated into or arranged after the closing unit 10, the plunger 58 impacts the lid 5 on the first container 4a. Otherwise, the plunger 58 impacts the neck 403 of the first container 4a. Here, the first sensor 26 is arranged below the transfer plane 20 and is, for example, fixedly mounted on the transfer table 22.

[0138] According to Figure 3bIn this embodiment, actuator 54 is securely connected to the first carrier element 46 such that the actuating motion of actuator 54 is directly transmitted to the first carrier element 46. Actuator 54 is illustrated herein by way of example as a hydraulic or pneumatic cylinder, although it may also be formed by any other desired actuator, as described above. In this embodiment, the first sensor 26 is also arranged below the transfer plane 20 and is, for example, fixedly mounted on the transfer table 22. Actuator 54 is arranged below the first carrier element 46 and is securely connected to the carrier element 46, for example, by a piston rod of actuator 54. Actuator 54 moves the first carrier element 46 together with the first test container 4a in the direction of movement B from the first arrangement down into the second arrangement. During this first relative movement, the first carrier element 46 and the first container 4a are at least partially moved through sensor 26. The first carrier element 46 is therefore descentable.

[0139] according to Figure 3c The embodiments basically correspond to those based on Figure 3b In this embodiment, the difference lies in that the first sensor 26 is arranged above the first carrier element 46 and the first container 4a relative to the conveying plane 20, and the first carrier element 46 is liftable. The first sensor 26 is preferably fixedly arranged, for example, fixed to the frame of the testing apparatus 16 or the packaging machine 2. However, the first sensor 26 can also be movably mounted, such that both the first carrier element 46 and the first sensor 26 are movable. The actuator 54 is again represented as a hydraulic cylinder or a pneumatic cylinder, although it can be configured in any desired manner. The actuator 54 is arranged below the first carrier element 46 and moves the first carrier element 46 together with the first container 4a to be tested upwards in the direction of movement B from the first arrangement into the second arrangement. During this first relative movement, the first carrier element 46 and the first container 4a are also at least partially moved by the sensor 26.

[0140] exist Figure 4 In this process, multiple sensors (including first, second, and third sensors 26, 30, and 34) are arranged sequentially along the conveying direction F. Each sensor 26, 30, and 34 is assigned one of multiple carrier elements 46, 48, and 50 to move one of the containers 4 under test through the corresponding sensor 26, 30, or 34. Figure 4 In this arrangement, the contact surfaces 52 of the multiple carrier elements 46, 48, and 50 are located within the conveying plane 20, so as to position the container relative to the multiple sensors 26, 30, and 34 in a first arrangement. The multiple sensors 26, 30, and 34 are arranged below the conveying plane 20, preferably fixed.

[0141] In the illustrated embodiment, multiple carrier elements 46, 48, 50 can descend relative to the transport plane 20. To move the carrier elements 46, 48, 50 synchronously, they are preferably connected to each other via a connecting element 62. For example, the connecting element 62 is configured as a track and arranged parallel to the transport direction F. Each carrier element 46, 48, 50 can be connected to the connecting element 62 via a support element 64, wherein the support element 64... Figure 4 The elements 62 are indicated by dashed lines and can be configured as rods, extending upwards from the connecting element 62 perpendicular to the conveying direction F. Each supporting element 64 can be surrounded by a sleeve 66, which is preferably arranged to be fixed. To lower the multiple carrier elements 46, 48, 50, the connecting element 62 can be movably mounted on the linear guide 68, for example, via a bracket. The linear guide 68 preferably extends substantially perpendicular to the conveying plane 20. Here, the actuator 54 can be configured as a servo motor and can, for example, move the connecting element 62 back and forth along the linear guide 68 via a drive 70. Other types of drives can be readily envisioned.

[0142] In all embodiments, the first sensor 26 or more sensors 26, 30, 34 are preferably configured as a ring sensor, which completely surrounds each of the containers 4a, 4b, 4c to be tested in the circumferential direction of the containers 4a, 4b, 4c in the second arrangement. For example, refer to Figure 3c It can be explained that the corresponding sensor 26 may have an opening 60, which is preferably configured as a channel into which the container 4a to be tested can be introduced. The inner circumference of the first sensor 26 corresponds to the inner circumference of the opening 60. The inner diameter I of the annular first sensor 26 corresponds to the diameter of the opening 60 and is larger than the diameter D of the first container 4a.

Claims

1. A testing device (16) for a packaging machine (2), the packaging machine being used to package edible products in a container (4), wherein the testing device (16) comprises: A conveying device (18) is configured to convey multiple containers (4) through the test device (16) in a timed manner along the conveying direction (F) in a conveying plane (20). Multiple sensors (26), wherein each of the multiple sensors (26, 30) is arranged in the test area (28, 32) of the test apparatus (16) and configured to detect foreign objects in the test container (4a) among the multiple containers (4); and Multiple carrier elements (46, 48), wherein one of the multiple containers (4) is a test container (4a, 4b) received in a test area (28, 32) by one of the multiple carrier elements (46, 48); The plurality of sensors (26, 30) and / or the plurality of carrier elements (46, 48) of the test apparatus (16) are configured to be movable, through which the plurality of test containers (4a, 4b) are received in the test area (28), such that relative movement between the plurality of sensors (26, 30) and the plurality of test containers (4a, 4b) occurs in a movement direction (B) between the first arrangement and the second arrangement, the movement direction (B) being perpendicular to the transfer plane (20); wherein, In the first arrangement, the plurality of sensors (26, 30) are arranged at a certain distance from the plurality of test containers (4a, 4b) along the moving direction (B), and in the second arrangement, the plurality of sensors (26, 30) at least partially surround the plurality of containers (4a, 4b). The sensors (26, 30) are arranged sequentially along the conveying direction (F) and configured to simultaneously test the multiple containers (4a, 4b) to be tested.

2. The test apparatus (16) according to claim 1, wherein the plurality of sensors (26, 30) are formed in a ring and, in the second arrangement, completely surround the test container (4a) in the circumferential direction.

3. The test apparatus (16) according to claim 1, wherein the plurality of carrier elements (46, 48) are configured to support the plurality of test containers (4a, 4b) from below in the test area (28) and are movable along the moving direction (B).

4. The test apparatus (16) according to claim 3, wherein the contact surfaces (52) of the plurality of carrier elements (46, 48) are located within the transport plane (20) in the first arrangement and not within the transport plane (20) in the second arrangement, and the plurality of test containers (4a, 4b) are arranged thereon.

5. The test apparatus (16) according to claim 1, wherein the plurality of sensors (26, 30) are arranged below the transport plane (20), and the plurality of carrier elements (46, 48) are descent relative to the transport plane (20).

6. The test apparatus (16) according to claim 1, wherein each of the plurality of carrier elements (46, 48) may descend relative to the transport plane (20) and is connected to each other such that they may move synchronously.

7. The test apparatus (16) according to claim 1, wherein at least two of the plurality of sensors (26, 30) operate at different frequencies.

8. A packaging machine (2) for packaging edible products in a container (4), wherein the packaging machine (2) comprises: A supply unit (6) is configured to supply a plurality of containers (4) into the packaging machine (2); A filling unit (8) is configured to fill the plurality of containers (4) with the edible product. Closing unit (10), which is configured to close the plurality of containers (4) respectively with lids (5); and The testing device (16) according to claim 1 is used to test foreign objects in the test container (4a, 4b) among the plurality of containers (4).

9. The packaging machine (2) according to claim 8, wherein the conveying device (18) of the testing device (16) is configured to convey the plurality of containers (4) through the filling unit (8), the closing unit (10) and the testing device (16) in a timed manner.

10. The packaging machine (2) according to claim 8, wherein the testing device (16) is arranged downstream of the closing unit (10).

11. A method for testing a container (4) of an edible product, utilizing a testing apparatus (16) comprising a conveying device (18), a plurality of sensors (26, 30) for detecting foreign objects, and a plurality of carrier elements (46, 48), wherein the method comprises the following steps: a) In a timed manner, multiple containers (4) are supplied along the conveying direction (F) in the conveying plane (20) via the conveying equipment (18) and the testing device (16). b) In the first arrangement, a plurality of test containers (4a, 4b) from the plurality of containers (4) are arranged in a test area (28) relative to a plurality of sensors (26, 30) for detecting foreign objects, and the plurality of sensors (26, 30) are arranged at a certain distance from the plurality of test containers (4a, 4b) in the first arrangement along a moving direction (B), the moving direction (B) being oriented perpendicular to the conveying plane (20), wherein, One of the containers (4) to be tested (4a, 4b) is received in the test area (28) by one of the carrier elements (46, 48) of the plurality of carrier elements (46, 48), and each of the plurality of sensors (26, 30) is arranged sequentially along the conveying direction (F); c) A first relative movement is generated between the plurality of test containers (4a, 4b) and the plurality of sensors (26, 30) along the direction of movement (B) from the first arrangement to the second arrangement, wherein the plurality of sensors (26, 30) at least partially surround the plurality of test containers (4a, 4b). d) Detect whether the plurality of test containers (4a, 4b) contain foreign objects using the plurality of sensors (26, 30), and thereby test the plurality of test containers (4a, 4b) simultaneously; e) A second relative movement parallel to the direction of movement (B) is generated between the plurality of tested containers (4a, 4b) and the plurality of sensors (26, 30), returning to the first arrangement; as well as f) Supply the plurality of tested containers (4a, 4b) from the test area (28).

12. The method of claim 11, wherein step c) comprises: The plurality of test containers (4a, 4b) are lowered relative to the transport plane (20), wherein the plurality of sensors (26, 30) are arranged below the transport plane (20).

13. The method of claim 11, wherein the sensitivity of the plurality of sensors (26, 30) is adjustable, and the method further comprises: The sensitivity of the plurality of sensors (26, 30) is adjusted according to the edible product.

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