EP3699101B1 - Method and device for producing filled containers - Google Patents

Description

The present invention relates to a device and a method for producing filled containers such as US 9,643,746 B1 is known. Numerous devices and methods of this type are known from the prior art. A container is usually first filled with a liquid and then closed with a closure. Methods are known in the prior art in which an inert gas is filled into the headspace of containers that have not yet been closed, in order to extend the shelf life of the beverage in question. This procedure is known in particular in so-called hot-fill processes, in which a heated liquid is filled into the containers. Recently, however, methods have also become known in which the containers are first closed, for example with a plastic closure, then this plastic closure is pierced again and the inert gas is filled through the opening thus created into the head space of the container. The opening created is then closed again.

On the one hand, these procedures are promising, but they are not yet ready for series production.

The present invention is therefore based on the object of making such devices known from the prior art ready for series production.

According to the invention, this is achieved by the subject matter of the independent claims. Advantageous embodiments and developments are the subject of the dependent claims.

A device according to the invention for producing filled containers has a transport device which is suitable and intended for transporting containers filled with a liquid and closed with a closure.

Furthermore, the device has a penetration device which is suitable and intended to create an opening in at least one area of the closure and/or the container and an application device which fills an interior of the container with a flowable and in particular gaseous medium through this opening applied (or this interior supplies the gaseous medium).

The closures are preferably closures that have been manufactured using a compression molding process. Another preferred device is closures that have a continuous or substantially continuous wall thickness.

In addition, it would also be conceivable for closures to be used that were produced in an injection molding process.

In a further procedure, the closure is designed in one layer. In this case, the closure preferably has no so-called liner on its inside.

Furthermore, the device has a closing device which closes the opening again (and which closes the opening again in particular after the interior space has been acted upon by the gaseous medium).

It is pointed out that, based on the basic structure of the machine described above, further configurations according to the invention are possible. The applicant reserves the right to claim such configurations, if necessary, within the scope of further patent applications and in particular further divisional applications. The following description does not exhaustively describe individual configurations according to the invention. The applicant therefore reserves the right to do so, also independently of the configurations described below to claim additional items based on the basic structure described here.

In a first embodiment, the device has a sterilization device which sterilizes at least one area of the closure and/or the container. In this embodiment, account is taken of the fact that the creation of the opening and the subsequent opening of the container can lead to contamination or contamination of the beverage.

For this reason, it is proposed to sterilize at least one area of the container or the closure (in particular the area in which said opening is or was made). in particular, this is an area of the outer wall. As mentioned below, this sterilization can take place in different ways, for example by heating or else UV radiation or the like.

In particular, this first measure also allows corresponding systems to be ready for series production since, as explained in more detail below, a series or industrial production of containers is also made possible.

In a preferred method, the containers are filled with a heated liquid and in particular with a heated beverage. During filling, the liquid preferably has a temperature which is greater than 30°, preferably greater than 40°, preferably greater than 50° and particularly preferably greater than 70°.

In a second embodiment according to the invention, the closing device has an ultrasound generating device.

This procedure also serves to ensure a reliable closure. Closing devices are known from the internal state of the art of the applicant, which reheat the region of the opening of the lid, for example by heating. In this case, however, only a specific area of the lid is heated and welded in this way. By using an ultrasonic generating device, a more reliable welding of the opening produced can be achieved, above all because the welding takes place deeper in the material. Ultrasonic welding also prevents the formation of toxic gases as in the case of heat smelting. In addition, no melted material can drip from the lid into the container.

In a further embodiment according to the invention, the device has at least one inspection device which monitors at least one device of the device and/or the device has at least one monitoring device which monitors at least one parameter that is characteristic of the production of the filled containers. In this configuration, too, the operational safety or the process safety of the containers produced in this way is ultimately increased. In addition, this measure also contributes to the fact that the containers are manufactured in ongoing production.

In a further configuration, the device has at least one cleaning and/or sterilization device which is suitable and intended for cleaning and/or sterilizing at least one device of the impingement device (and/or the penetration device).

In this configuration, it is assumed that the application device (and/or the penetration device) has elements to be cleaned or sterilized, for example, such as supply lines for a gaseous medium or the like. Depending on the application, for example depending on the filled element, a different degree of cleaning or sterilization may be necessary. Correspondingly, different cleaning and/or sterilization media can also be used. This cleaning and/or sterilization device is preferably active in a cleaning operation that differs from a normal work operation in which the containers themselves are treated.

Furthermore, it is also possible for the cleaning and/or sterilization device to clean or sterilize other elements of the device, such as the penetration device or the closing device.

In a further embodiment, the application device enables the container to be subjected to a first pressure and a second pressure, which differs from the first pressure. This approach is fundamental proposed that the medium is supplied with different pressures through the opening.

As mentioned above, in such methods, containers and in particular hot-filled containers are generally pierced through the closure after recooling and pressurized with a gaseous medium, in particular an inert gas and in particular nitrogen.

As mentioned above, this is done in order to bring unstable containers which have "collapsed" after recooling by the cooled headspace gas back into shape and also to make them stackable. In order to get gas into the headspace of the pierced bottle as quickly as possible, it is proposed in this embodiment to first bring gas quickly into the headspace with high pressure in order to keep the process time and thus also a possible corresponding machine small. The desired final pressure in the head space is then set with a small, considerably lower pressure.

A first pressure is preferably a pressure which is greater than 2 bar, preferably greater than 2.5 bar, preferably greater than 3 bar and preferably greater than 3.5 bar.

The first pressure is preferably a pressure which is less than 10 bar, preferably less than 9 bar, preferably less than 8 bar, preferably less than 7 bar and preferably less than 6 bar. The pressure is particularly preferably in the range of approx. 4 bar.

The second pressure is in particular a pressure that defines the desired end pressure in the headspace. For example, this can be a pressure of 0.3 (overpressure), i.e. 1.3 bar. This second pressure is preferably greater than 0.1 bar (gauge pressure), preferably greater than 0.2 bar (gauge pressure) and particularly preferably greater than 0.25 bar (gauge pressure).

This second pressure is preferably less than 3 bar (gauge pressure), preferably less than 2.5 bar (gauge pressure), preferably less than 2 bar (gauge pressure), preferably less than 1.5 bar (gauge pressure), preferably less than 1 bar ( overpressure) and preferably less than 0.5 bar (overpressure).

The pressures mentioned here can also be referred to below as pressure stages.

In a preferred embodiment, the closing device can also be moved and in particular can be advanced onto the container. For example, the closing device can be a rod-like body, the tip of which is heated and which can be advanced onto the container. The closure device can preferably be moved in a linear direction of movement. This direction of movement is preferably at an angle to a longitudinal direction of the container to be treated.

The closure of the container is preferably a plastic closure. In a further preferred embodiment, the container itself is also a plastic container and in particular a deformable plastic container.

In a further preferred embodiment, the sterilization device is suitable and intended for sterilizing at least a portion of the opening. This helps to ensure that no dirt or germs can get into the interior of the container through this area.

In a further advantageous embodiment, the sterilization device has a radiation device which applies electromagnetic radiation and in particular high-energy light, for example high-energy UV light, to at least one area of the container and/or a heating device which heats at least one area of the container. In this configuration, two different procedures for sterilization are proposed, namely on the one hand heating in particular a region of the opening and/or irradiation with light. This electromagnetic radiation can be, for example, ultraviolet radiation, but also electron beams, X-rays or radioactive radiation.

In addition, however, it is also possible to apply a gas to the closure for sterilization, for example a sterile gas or a sterilizing gas such as H ₂ O ₂ . It is also possible for the sterilization device to be implemented in that the process of producing the opening in the closure also takes place during exposure to a sterilizing gas.

In a further preferred embodiment, the sterilization device has a heating device which can be advanced onto the area of the closure and/or the container to be sterilized in order to sterilize this area. This ability to be delivered can take place by moving the sterilization device, but also by moving the container.

The sterilization device is preferably designed in the manner of a plunger which can be lowered onto the closure. A drive device is particularly preferably provided which moves at least one element of the sterilization device towards the closure. This can be, for example, an electric drive, a hydraulic drive or a pneumatic drive. A pneumatic drive is particularly preferably used.

In a further advantageous embodiment, the device has a control device which causes the sterilization device to sterilize the area of the container and/or the closure after the perforation device has introduced the hole. In this case, the hole is first made and then the area is sterilized, for example heated or exposed to UV light. It is also possible that there is a mechanical coupling between the perforation device (for example a needle) and the sterilization device.

In a further advantageous embodiment, the device has a sterile room within which the containers are transported at least in sections. It is possible for the entire device to be arranged inside a sterile room, but it would also be possible for the transport path of the containers and/or the containers to be guided inside the sterile room, but other areas of the device, such as parts of the transport device, are arranged outside this sterile room are. For example, the sterile room could surround the containers like a torus.

The sterile space is preferably separated from a (non-sterile) environment by means of at least one wall. The sterile space is preferably delimited from the (non-sterile) environment by means of at least two walls, these walls particularly preferably being movable with respect to one another.

A sterilization device is preferably provided, which already sterilizes the containers and/or the closures before the actual device.

For example, it would be possible for sterilization to take place in front of the actual device, for example in an inlet tunnel, for example using H ₂ O ₂ or peracetic acid, but possibly also using electromagnetic radiation. The lids and/or the entire container can be sterilized in an H ₂ O ₂ tunnel, for example. In order to avoid renewed contamination of the closures and/or the containers, the device in the embodiment described above is set up in a sterile room and/or isolator technology.

At least one ventilation device is preferably provided, which applies an overpressure of a gaseous medium, in particular but not exclusively sterile air, to this isolator or its interior. In this way, penetration of germs into the isolator or sterile room can be avoided. In addition, a sterilizing gas can also be present in the isolator or clean room, in particular in a low concentration, in order to prevent contamination. H ₂ O ₂ can also be used to sterilize the corresponding supply lines, for example the lines leading into the clean room. The same also applies to the process head.

In a further preferred embodiment, the device has a cleaning device for cleaning the device itself, such as so-called CIP cleaning (cleaning in place). A cleaning operation can be provided, during which the device itself is cleaned.

In a further preferred procedure or hygiene concept, lid sterilization, particularly in the inlet area, is provided by means of a pulse light, with which one or more lids can be sterilized at once. In this case, the device has a radiation device which is suitable for emitting pulsed radiation, such as UV radiation, electron beams, X-rays or the like.

In order to prevent renewed contamination of the cover, the device is preferably equipped with a clean room roof, which has a corresponding air flow with sterile air generated. Superheated steam, for example, is used to sterilize the corresponding supply lines and the process head.

In addition, the device preferably has a drying device which enables devices of the device to be dried after they have been sterilized. For example, it would be conceivable that after sterilization (e.g. with superheated steam), the system could be dried again by air flow.

In a further preferred embodiment, the transport device transports the containers individually. in particular, the containers are gripped individually. It is possible for the transport device to grip the containers at least by their neck or mouth.

In a further advantageous embodiment, the opening is closed by changing the material and in particular by (partially) melting the plastic material of the closure and/or the container.

In a further advantageous embodiment, the penetration device has a piercing device and in particular a needle. This can be designed, for example, as a solid needle or as a hollow needle.

The transport device is preferably designed as a rotary device. In a further advantageous embodiment, the application device is suitable and intended for applying an overpressure of gaseous media to the head space of the container or the container. This can be, for example, an overpressure of three or four bar.

In a further advantageous embodiment, the closing device has a feed device which feeds at least one element of the ultrasound generating device onto the opening. In this case, this feed device can have a drive which is selected from a group which has electric drives, hydraulic drives and pneumatic drives. The feed device particularly preferably has a pneumatic drive.

The delivery device is particularly preferably suitable and intended for delivering an ultrasonic element completely onto the container, ie in such a way that it contacts the container. However, it would also be possible for a (particularly small) distance to be maintained between the container and the ultrasound generating device.

In an embodiment according to the invention, the ultrasound generating device has a sonotrode.

In the embodiment according to the invention, the ultrasound generating device is integrated in a plunger which at least temporarily makes contact with the container and/or the closure. This stamp can preferably be placed on the container and in particular on the opening to be closed and its surroundings, and the ultrasonic signal can be activated. The device particularly preferably has an ultrasound generating device which is suitable and intended for generating the ultrasound signal which excites said sonotrode or another ultrasound generating element.

However, it would also be possible and preferred to already activate the ultrasonic signal before the plunger is placed on the container. In this way, the process time can be kept short or as short as possible.

In a further advantageous embodiment, the ultrasound generating device has a piezoelectric element.

In a further advantageous embodiment, the ultrasound generating device has a generator device which is suitable and intended for generating an ultrasound whose frequency is greater than 20 kHz and/or the ultrasound generating device has a generator device which is suitable and intended for generating an ultrasound whose frequency is less than 35 kHz. However, it would also be possible for other frequencies to be used, such as frequencies in the range of 70 kHz.

In a further advantageous embodiment, the device has a sensor device which at least partially or at least temporarily determines a parameter that is characteristic of the ultrasonic welding process. For example, heating of the plastic material can be determined, but it can also be checked whether the sonotrode is active or whether an ultrasonic signal is emitted. In other words, it is possible for this sensor system to monitor both the ultrasound and the respective welding result at the welding point.

For example, it can be checked whether an ultrasonic signal is present, or whether a check is carried out indirectly, for example using electric currents. In a preferred embodiment, the sensor device has a power measuring device.

In the embodiment according to the invention, the ultrasound generating device has a processing head that can be advanced onto the closure and/or the opening, which in turn has a surface that can be turned towards the opening and is designed in such a way that it is suitable for urging molten material in the direction of the opening. As described above, a sonotrode is used for ultrasonic welding, for example of a hole pierced in the lid. As mentioned above, this is placed on the cover in order to close the hole there again by melting the material using ultrasound.

The Applicant has found that with certain shapes of this sonotrode, although a nice weld is obtained, due to a specific shape of the sonotrode, for example a round shape, the tip cannot always be guaranteed to weld the existing hole. This is because certain sonotrode shapes melt the material but carry the melted material away from the pierced hole. The embodiment described here therefore proposes that the molten material is guided in particular by the geometric surface shape in such a way that the molten material is urged in the direction of the opening.

The applicant reserves the right to independently claim protection for such an embodiment and in particular a sonotrode with the form described here.

The surface that can be turned towards the opening is understood to mean that component or in particular that end face of the sonotrode which is arranged closest to or at the smallest distance from the opening during the working process. It is suggested, that this surface is designed in such a way that it urges molten material towards the opening.

According to the invention, this surface is concavely curved. As will be described in more detail below, this curved surface achieves an urging of the melted material towards the opening. Instead of a curved configuration, however, an angular configuration would also be possible, for example in the shape of a cone or the like.

This surface of the sonotrode particularly preferably has an opening edge, and in particular also an area that is set back from this opening edge, i.e. an area that, in contrast to the opening edge, is further away from the opening to be sealed and in particular is further away from a longitudinal direction of a sonotrode of the opening to be merged as the opening edge.

In a further preferred embodiment, the edge of the opening can be placed at least in sections and preferably circumferentially on the closure and in particular on the areas surrounding the opening.

The processing head is particularly preferably designed in the manner of a trough in the area in which it is placed against the opening, with an edge of this trough being able to be placed against the covers.

Material melted within this rim is forced into the opening as will be explained in more detail below.

In a further preferred embodiment, said surface has a spherical shape, such as the shape of a hemisphere or the like. However, other spherical recesses or troughs are also possible, for example, as mentioned above, in the manner of a cone, a truncated cone or an ellipsoid.

In a further preferred embodiment, a second machining head equipped in the same way is provided.

As mentioned above, the sonotrode shape described herein has a concave tip shape.

Since the ultrasound generating device, in particular in the form of a sonotrode, is an acoustic component, it is advantageous for it to be constructed symmetrically. Therefore, according to the invention, the concave embodiment described here is present on several sides, namely on both sides of the sonotrode. In this way, a symmetry of the sonotrode can be achieved.

As mentioned, the melt is carried over the hole to be closed by the concave head and in particular the concave tip during welding, so that there is always a certain layer thickness over the hole to be closed. In this way, a more reliable welding and/or reclosing of the hole in the container, or its closure, can be guaranteed, in particular by a concave shape of the sonotrode, since edge material is carried and/or pushed directly over the hole with each weld. The surface of the sonotrode which contacts the cover is particularly preferably symmetrical and, in particular, circular in cross section. In a further preferred embodiment, the ultrasound generating device can be advanced onto the opening in such a way that a longitudinal direction of the ultrasound generating device encloses an angle that is greater than five degrees, preferably greater than ten degrees, preferably greater than 15 degrees, relative to a direction standing on a surface of the closure and preferably greater than 17 degrees.

In a further preferred embodiment, this angle, which the longitudinal direction of the ultrasound generating device encloses with respect to a direction perpendicular to the surface of the closure, is less than 50 degrees, preferably less than 40 degrees, preferably less than 30 degrees and preferably less than 23 degrees.

In a further preferred embodiment, said longitudinal direction of the ultrasound generating device is also the infeed direction, ie the direction in which the ultrasound generating device is moved relative to the closure.

In a further advantageous embodiment, the device has a plurality of transport units which are preferably arranged one after the other and which transport the containers. For example, the container can be brought to the device described here with a further transport device. It is also possible that a transfer device takes place, which changes from bottom-guided transport of the containers to neck-guided transport of the containers.

In a further advantageous embodiment, the device has a separating device which transfers a stream of containers into successive individual containers. For example, a feed screw can be provided in the inlet of a machine.

In addition, a snailless inlet would also be possible. It is possible that the containers are handed over to one or more infeed stars, depending on the machine arrangement. In a further preferred embodiment, the individual containers are also raised or lowered, if necessary, in order to achieve a uniform level for transfer to a neck treatment or neck transport area. It is possible for the containers to be lifted, for example by means of lifting cams on a neck ring.

In addition, a lifting star can also be provided. It would also be conceivable for the containers to be held down during their transport, or for a lowering curve to be present. In addition, it is also possible for the containers to fall a certain (particularly short) distance outdoors or for there to be a level neck handling guide.

In a further advantageous embodiment, a transfer into a neck treatment clamp takes place. If necessary, additional guides can be provided, in particular in the area of a transfer and preferably also with an intervention in a closure area or in an area in which the containers are transported by their necks.

In a further preferred embodiment, the sterilization device is designed in such a way that it sterilizes the closure or lid when the containers are closed allows. It is possible for the container lids to be sterilized for the process while they are already closed. This can be accomplished via one or more dry or wet processes. As mentioned above, the sterilization can take place, for example, using ultraviolet light, H ₂ O ₂ , chlorine dioxide, superheated steam, peracetic acid, but also electron beams and the like.

In a further preferred embodiment, a sterilization device is also provided, which sterilizes the penetration device or lancing device, for example a needle. Such sterilization can be carried out, for example, by means of temperature or heating and/or a sterilization medium such as ultraviolet light, H ₂ O ₂ , chlorine dioxide, superheated steam and/or the penetration device can be kept sterile by appropriate procedures.

In a preferred embodiment, it is possible for the procedures or processes described here to be carried out in a linear machine. For example, containers can be treated directly on a conveyor. For example, corresponding process heads can be transported above or via a drag chain via a linear motor, via a pneumatic guide or the like. Furthermore, both continuous operation of the transport device and cycle operation are possible.

Several variants are conceivable for sterilization with a gas and, for example, H ₂ O ₂ . For example, an H ₂ O ₂ reservoir could be arranged in the application device, such as the application head. In addition, a pulsed light could also be integrated into the head, particularly when exposed to UV light. In the embodiment with H ₂ O ₂ in a head, sterilization of the head and the add-on parts by means of H ₂ O ₂ is conceivable. Furthermore, it is also preferred that after being placed on the container, an inner zone of the container is flushed with H ₂ O ₂ in order to sterilize this area.

In the embodiment with light pulses, for example with ultraviolet pulses, the head and the add-on parts can be sterilized by means of UV light. Furthermore, after being placed on the container, the inner zone of a container can be treated with UV light in order to sterilize this area.

When sterilizing with other media, such as chlorine dioxide, peracetic acid or also when sterilizing by means of electron beams, it is also conceivable to keep a head or the impingement device sterile by means of temperature.

In the case of a chlorine dioxide wet sterilization of the cover, for example, by means of the action of ClO ₂ , sterilization before the actual device is also conceivable. A corresponding sterilization could already be carried out before a recooler upstream of the device described here.

Sterilization by means of electron beams (e-beam) of the lid can be provided either in an inlet area of the device or directly in the head of the impingement device.

In the case of sterilization using peracetic acid or wet sterilization of the lid or the containers, sterilization within an isolator is also conceivable. Both the isolator and the supply lines can be sterilized. If appropriate, this can also be carried out using peracetic acid.

In a further advantageous embodiment, the inspection device and/or the monitoring device is suitable and intended to output at least one value that is characteristic of the setup of the device and/or the manufacture of the filled containers.

Particularly preferably, the value that is characteristic of the setup of the device is selected from a group of values that include a value that is characteristic of a physical property of the penetration device, a value that is characteristic of a positioning of the penetration device relative to the container and/or the closure, a value characteristic of a relative movement between the penetration device and the container, a value characteristic of focusing a light beam, a value characteristic of the impingement device, a value characteristic of the closing device, in particular a temperature value or the like.

It is therefore proposed that those values are determined which are relevant for a reliable penetration and/or loading and/or sterilization and/or sealing process. This can be, for example, the condition of a penetration needle, for example it can be checked whether it has broken off or is generally still intact. Several such values can also be determined.

In addition, the concentration of a sterilizing agent can also be measured.

In a further advantageous embodiment, the inspection device and/or the monitoring device has a sensor device selected from a group of sensor devices containing temperature sensors, pressure sensors, acceleration sensors, movement sensors, distance sensors, acoustic sensors, proximity sensors and the like.

In a further advantageous embodiment, the device has a memory device which stores the values output by the respective sensor device. In addition, a comparison device is preferably provided, which compares the values output by the sensor device(s) with reference values, in particular with reference values stored in a database.

In a further advantageous embodiment, the device can have a control and/or regulation device which controls the device taking into account the values output by the sensor device or devices.

In a further preferred embodiment, the value that is characteristic of the production of the filled containers is selected from a group of values that contains temperature values, pressure values, in particular a pressure value inside the container, speeds, accelerations, optical parameters and the like. This can be the temperature of the liquid in the container, for example, or the temperature of a welding stamp that seals the opening produced. In addition, such values can also be recorded over a longer period of time. Such values can also be used to make a prognosis about a state of wear.

In addition, it is also possible for the puncture to be checked visually, for example in a container closure.

Furthermore, a temperature measurement can be made possible, for example a temperature measurement of a sealing point.

In addition, it is also possible for measurements, such as pressure measurements, to be carried out on the container before and after the implementation of the corresponding method.

In a further preferred embodiment, the inspection device is suitable and intended for determining the relevant value without contact. For example, the inspection device can be a camera or a proximity sensor or the like.

In a further advantageous embodiment, the device has an error generation unit which is suitable and intended for generating operating errors. In this case, it is proposed that an error is first intentionally generated in order to check the inspection unit, ie this inspection device must then be able to detect this error. It is thus possible, for example, for a defective seal to be deliberately produced in order to check the subsequent inspection device, that is to say to check whether it can also detect this defect.

In a preferred procedure, a needle inspection could take place between an infeed starwheel of the containers and an outlet starwheel of the container. It would be conceivable that the penetration device, for example a needle, is briefly extended in order to be recorded with at least one camera, preferably with two cameras, which are preferably offset by a predetermined angle with respect to one another.

Since such an inspection rarely finds or reports errors in practice, a self-check is advantageous. This can be done, for example, by the needle not being extended at intervals and the camera then having to report this provoked error as proof of the correct inspection function.

In a preferred embodiment, an inspection device is provided which enables thermal monitoring of the spot weld. For example, sensors such as infrared cameras or thermopiles can be provided which, after welding, check whether local heating by a minimum temperature difference can be measured at the welding point.

In addition, it is also possible and preferred for the penetration device to be inspected and/or checked. For example, a needle, the puncture hole created by this needle and/or the shape of a spot weld can be checked. Here, for example, a detection of the position of the hole and/or weld point with respect to an outer edge of the closure, a roundness of the hole and/or weld point, the diameter of the hole and/or weld point, a curvature of the hole and/or weld point on the closure is conceivable.

The inspection device preferably has an image recording device, such as in particular but not exclusively a camera, which observes the puncture hole and/or the spot weld. This image recording device can be arranged in particular above the container closure.

The device preferably has an inspection device which is used to check the closure and/or the internal pressure of the container. This can be done, for example, by arching the container closure. This inspection device can have an optical means, for example. For example, a single-point laser triangulation sensor can be provided, which records a height profile of the closure and in particular the closure passing underneath.

The internal pressure and thus, for example, a leak can be inferred from a curvature of a recorded measurement curve. Even if the curvature changes or "wanders away" due to slowly changing environmental conditions, individual profiles that deviate more strongly can be recognized. The detection is even more robust (albeit more complex) if a planar surface profile of the closures is recorded.

As mentioned, the penetration device, which can have a needle, for example, can also be inspected optically. An inspection device is therefore preferably provided which inspects at least one element of the penetration device, in particular optically. The penetration device or the needle is preferably examined with regard to a property which is selected from a group of properties which include bending of the needle, bluntness of the needle, any broken needle, position or length of the needle, the presence of residues of the needle and/or the presence of debris on the needle.

Especially when there are multiple devices such as those for sterilization, for penetration or for reclosing, as is typically the case in rotary machines, it is proposed to monitor these devices individually and in particular to statistically monitor them individually. For this purpose, several measurements of one or more properties can be statistically aggregated for each individual device in order to detect deviations early on in the sense of preventive maintenance, before they affect production. The statistical aggregation, for example an averaging over many measured values, allows a significantly higher accuracy than individual measurements. If trends are then derived from time series, e.g. the reaching of a wear limit can be predicted at an early stage.

The present invention is also directed to a device for producing filled containers with a transport device which is suitable and intended for transporting containers filled with a liquid and closed with a closure. Furthermore, a penetration device is provided which is suitable and intended to create an opening in at least one area of the closure and/or at least one area of the container and also an application device which fills an interior of the container through this opening with a free-flowing and in particular gaseous medium applied. Furthermore, a closing device is provided which closes the opening.

The device can have a changing device which is suitable and intended for changing at least one device of the device.

This can be, for example, an element of the penetration device, such as a needle or the like. Furthermore, this device of the device could be an element of the loading device, or also an element of the closing device.

This changing device is preferably suitable and intended for carrying out the designated change automatically. It is thus possible that if the penetration device, for example the needle, is damaged, it can be automatically replaced.

In a further advantageous embodiment, the device has a storage device for storing at least one and preferably several such elements, such as for example one or several corresponding needles. This storage device or this magazine can be placed in a specific position, so that if the needle or penetration device is damaged, this position can be approached and an exchange can be carried out using a changing system and/or a robot.

In addition, it is also possible for the changing device itself to be integrated into the penetration device. For example, a magazine can be located in the process head, which replaces a needle if it is damaged. For example, a damaged needle can be ejected and replaced with a new one.

In general, the penetration device and the closing device can be arranged and/or moved in different ways. It would thus be conceivable for both the penetration device and the closing device to be fed to the container and/or the container closure with the same direction of movement. The penetration device and the closing device could be arranged on a carrier, for example, which is designed in the manner of a revolver drum.

In addition, the directions of movement of the respective infeed movements could also run at an angle other than 0° or be oblique. It would be possible for one of the two elements to be perpendicular to the container and/or closure wall stands, but it would also be possible for both elements to stand at an angle to the wall to be pierced in each case.

In order to avoid transverse forces occurring as a result of an oblique impact on the section to be pierced and/or to be closed, the two devices can be placed perpendicularly on the surface to be pierced. In this case, a movement device is preferably provided, which moves at least one of the two devices at least also in a direction perpendicular to the piercing direction, such as the above-mentioned revolver drum-like device.

In other words, an alternating movement of the components can preferably be carried out, which can take place, for example, by a horizontal displacement of the penetration device and/or the closing device or can also be realized by a rotary movement.

In addition, the container itself could also be moved—in particular transversely, in particular perpendicularly, to its longitudinal direction in relation to the penetration device and/or the closing device.

Particularly preferably, a plurality of stations are arranged on the transport device, each of which preferably has the above-mentioned devices, i.e. each has an impingement device, a penetration device and/or a closing device.

The cleaning and/or sterilization device is particularly preferably suitable for applying a free-flowing cleaning medium to devices of the application device(s), as described in more detail below.

In a further embodiment, the application device enables the container to be subjected to at least a first pressure and a second pressure, which differs from the first pressure. For example, it is possible that the container is initially subjected to a greater overpressure, for example a pressure of four bar, and then to a pressure which then essentially corresponds to the internal pressure of the container, for example a pressure of 1.3 bar (or 0.3 bar overpressure compared to ambient pressure). In particular, this is the pressure of the free-flowing medium that is introduced into the container through the opening made.

In a preferred embodiment, the application device has at least one feed line, which feeds the medium to the interior of the container, and the sterilization device is suitable and intended for rinsing this feed line with a cleaning and/or sterilization medium. The application device particularly preferably has at least two feed lines which feed the flowable medium to the interior of the container, and the sterilization device is suitable and intended for rinsing both feed lines with the cleaning and/or sterilization medium.

In addition, the application device can have an application space which is in fault connection with the interior of the container and into which at least one, preferably both, supply lines lead.

In a further advantageous embodiment, the cleaning and/or sterilization device has at least one stationary feed device for a cleaning and/or sterilization medium. It is possible that such feeds or also a corresponding reservoir for the cleaning and/or sterilizing agent are arranged in a stationary area of the machine and in particular this cleaning and/or sterilizing agent is transported to a moving part of the device.

In a further preferred embodiment, the application device is arranged on the transport device. This means that the application device is transported with the transport device.

The device particularly preferably has a large number of such application devices. For example, a large number of corresponding stations can be implemented, at which, as mentioned above, penetration devices, application devices and/or closing devices are arranged.

In a further advantageous embodiment, the device has a distribution device which distributes at least one free-flowing medium from a stationary supply device to a large number of application devices. In particular, this distribution device can be a so-called rotary distributor, which, starting from a stationary supply, divides up a large number of loading devices that are arranged on the transport device and are therefore movable.

However, it is possible for the actual sterilization or cleaning to take place with the impingement devices in a stationary state. Furthermore, it is also possible that the named distribution device is also suitable and intended for distributing the flowable medium from a stationary part of the plant to the individual application devices during operation.

In a further advantageous embodiment, the device has a stationarily arranged supply device for supplying the flowable medium. It is thus also possible for the flowable medium, which is applied to the containers during operation, to be transferred from a stationary part of the system to a moving and, in particular, rotating part of the system.

In a further advantageous embodiment, the device has a selection device and/or switching device, which enables the charging device to be optionally charged with the free-flowing medium or the cleaning and/or sterilization medium. It is possible for the device, as described in more detail below, to have two different operating modes and for the selection device, such as a valve, to cause the charging device to be charged either with the free-flowing medium or with the cleaning and/or sterilization medium.

In a further preferred embodiment, the flowable medium (which is used for sterilization and/or cleaning) is a gaseous medium and in particular a medium such as steam, hydrogen peroxide or the like. However, sterilization with a liquid medium would also be possible.

In a preferred embodiment, at least one of the pressures (mentioned above) or one of the pressure levels (to which the container is subjected) is made available by means of a pressure accumulator device.

In particular when using a rotary machine, there is generally a need to transfer the two pressure levels to the rotating part of the machine or to reduce the pressure in the rotation, in particular in order to keep a corresponding media distributor simple.

However, a pressure reduction during rotation is only possible to a limited extent, since the built-in components, especially a pressure reducer, are not hygienic components and therefore the entire line cannot be dampened to maintain hygiene.

If the pressure is reduced with a valve manifold and transferred to the rotating part of the machine with separate lines, this would lead to a complicated structure for the media distributor.

In addition, a pressure reduction in a line and a subsequent decrease always requires a highly precise setting and tuning of controllers, since a decrease has an immediate effect on the existing volume in the pipe. The pressure then often fluctuates so that the pressure in the headspace of each container is not the same.

The embodiment mentioned above therefore proposes providing a pressure accumulator on the rotating part and on the moving part of the plant, respectively. More precisely, this idea assumes that only one line with a pressure level of about the lower pressure or the higher pressure is routed through a media distributor.

In the rotating part, a pressure accumulator with a high volume is then filled with a higher pressure p1 via a control valve (which can preferably be damped). This pressure accumulator can be designed, for example, as a ring tank. The pressure accumulator device thus preferably makes the higher pressure available. As mentioned, this pressure accumulator can be designed as a ring line and have a number of dependent individual stations.

In a preferred embodiment, the pressure accumulator device is arranged on a device of the transport device. For example, as mentioned above, in the case of a rotary machine, a rotating wheel can be provided on which the pressure accumulator is in turn arranged. Several of the stations mentioned above, which are used to treat the containers, can also be provided on this wheel.

In a further preferred embodiment, the device has a large number of application devices, and preferably several of these application devices are supplied with at least one pressure from a common pressure accumulator device.

In a further preferred embodiment, pressure is also made available by means of a stationarily arranged supply device. In particular, this is the smaller print. This is preferably distributed to the individual stations by means of a distribution device, for example a so-called rotary distributor.

The higher pressure is preferably made available or supplied via a rotary distributor. This pressure can be reduced by means of a reducing device, for example by means of a control valve. In this way, the accuracy when the containers are pressurized can be ensured via the pressure accumulator.

In a further preferred embodiment, the different pressures are made available to the container via at least two feed lines. It is thus possible for a pressure space to be applied to the headspace of the container or to the closure and for this pressure space to be supplied by the two lines. The pressure can reach the interior of the container via this pressure chamber.

In a further preferred embodiment, the device has at least one sealing device which seals the container and/or the container closure during loading. It is thus possible for the container itself to be delivered to a sealing surface of an application head. In addition, however, it would also be possible to lower the head onto the container. Besides or in addition, it would also be possible to Insert the container from the side and thus generate the seal between the container and the process head.

To pressurize the interior of the container, sealing may be done on the top of the closure. In the prior art, this is realized by feeding in the entire process head. The disadvantage here is that the head has to be moved with the entire periphery, which shortens the service life of the connections and seals.

In addition, the sealing movement can be carried out by lifting the containers. As a result, the process head remains permanently in a fixed position and is not damaged by constant movement. When lifting the bottle, only one bottle holder, such as a clamp, needs to be moved.

It is also possible to seal the process head and container closure without moving the two components. An additional intermediate piece is pushed between the two sealing surfaces.

In order to apply pressure or to equalize pressure in an already closed container, sealing can be carried out at the point at which the container is to be opened.

In a further advantageous embodiment, the device has a control device for at least one of the pressures or one of the pressure stages. Such a control device can be arranged in particular on the memory.

For example, it would be possible for a pressure transmitter to be provided on or in the pressure accumulator in order to regulate the pressure. Furthermore, the outlets to the treatment stations can be provided on the pressure accumulator in order to set the desired final pressure in the containers.

The media distributor used here can be kept quite simple, and the structure of the entire machine can also be simplified as a result. The desired pressure level can be set very precisely by the volume of the pressure accumulator for the low pressure, since there is a decoupling from the high pressure. It is therefore possible that the pressure accumulator serves both to provide a high pressure and to provide a low pressure.

Furthermore, it is also possible for the pressure accumulator device mentioned to be sterilized, for example with steam. Different setpoint pressures can also be set independently, depending on the desired container pressure, via a control valve used to feed the accumulator.

This means that there is no need to change elements, such as screens. In addition, precise adjustment of the treatment time is no longer as important as in the prior art. Through the (possibly additional) use of orifices to reduce the pressure from p1 to p2, it would also be possible, for example if the treatment time was too long, to obtain too high a pressure in the headspace, which would lead to process instability.

In a further advantageous embodiment, said application device for the containers is arranged on the transport device. As mentioned above, a large number of such application devices can be provided.

In a further preferred embodiment, the pressure accumulator device can be cleaned and/or sterilized by means of a cleaning line and/or a sterilization line.

In a further preferred embodiment, the device has a recycling device which is suitable and intended for at least partially recovering a gaseous medium and in particular the medium described above for charging the containers. For example, nitrogen consumption can be reduced through pressure recycling.

In a further preferred embodiment, a piercing position of the penetration device relative to the container can be changed and/or adjusted. This can be done in particular but not exclusively by changing the position of the penetration device and/or a needle relative to the region of the container to be penetrated and in particular the container closure, in particular perpendicular to the longitudinal direction of the container.

In this way, for example, a closure can be pierced at essentially any position. The piercing of the container lid can preferably take place centrally. However, it is also possible to treat the container closure in an oriented position so that a lid design or closure design is not damaged by needle and/or welding.

It is also possible to pierce and seal other areas of the container, for example over the bottom of the bottle. In this case, the container is preferably treated from the bottom (e.g. injection point of the preform) so that no obvious intervention on the container is visible.

In order to change and in particular to increase the process speed, the number or size of the holes can be varied. The at least one hole can preferably have a diameter of 0.05mm-4mm, preferably 0.1mm-2mm.

The shape of the hole can also vary, for example a round, square, triangular or oval shape is possible. Alternatively, the shape of the hole could be a polygon.

If there are several holes, there is the possibility of welding all holes with one welding stamp or the number of welding stamps corresponds to the number of holes/needles. It is also possible for several welding stamps to be provided, but at least one of these several welding stamps welds several holes.

The welding stamp can also contain a pattern, for example a logo, diamond pattern or checkerboard pattern, which is transferred to the container during the welding process. An advantage here is the minimization of external influence by third parties (an imitation of this form is difficult).

In addition, a blank closure can be used and branding can be applied by welding.

Several methods can be used to close and/or weld the punched hole. In one method, the containers or closures (Plastic) can be sealed using heat/warmth. This can be done in particular, but not exclusively, by using microwave heating devices, infrared heating devices, ultrasonic heating devices, soldering irons/heating stamps, laser devices, hot air application devices or the like.

Another possibility is (alternatively or additionally) to close the hole again by feeding in material. This can be done, for example, by means of application devices for applying adhesives or hot plastics.

In a further embodiment, the device has a sealing device which is suitable and intended for sealing a resealed hole. This sealing can serve both as a mechanical protection of the weld against damage and environmental influences, as well as to guarantee the integrity of the product.

Furthermore, it would also be possible for a sealing pattern to be applied using a laser.

The present invention is also directed to a method for producing closed containers filled with liquids, with containers filled with a liquid and closed with a closure being transported with a transport device and with a penetration device at least in a region of the closure and/or the container Opening is produced and an interior space of the container is acted upon through the opening with a free-flowing and in particular gaseous medium with an actuation device and the opening is then closed again with a closing device.

A possibility is therefore also proposed on the process side in order to make available a process suitable for production manufacture.

In a first embodiment, at least one area of the container and/or the closure is sterilized. In terms of the method, it is also proposed here that sterilization of an area of the container and/or of the closure and/or a region of the device such as the penetration device or the impingement device and/or the closure device.

In a preferred method, sterilization occurs after perforating the closure or container. Sterilization can take place during the period in which the container is open and loaded. However, it would also be possible for the sterilization to take place before the closure and/or the container is perforated.

In an embodiment according to the invention, the closing device closes the opening by the action of ultrasound. As mentioned above, a sonotrode is used for this purpose according to the invention.

At least one element of the closing device particularly preferably contacts a region of the opening at least temporarily during the closing process. Particularly preferably, at least one element of the closing device is delivered to an area of the opening and/or the closure and/or the area of the container that has been perforated.

For this purpose, for example, drives such as, in particular, pneumatic, electric or hydraulic drives can be used. In addition or in addition, it would also be possible to use guide curves that enable the respective movements.

In a further preferred method, the closing device causes at least part of the container or the closure to mechanically oscillate at least temporarily. A material to be heated is particularly preferably heated and, in particular, melted by this mechanical vibration and the closure is thus ultimately achieved. At least partial melting of the area to be closed is particularly preferably achieved by this oscillation.

In a preferred method, a frequency that is greater than 5 kHz, preferably greater than 10 kHz and preferably greater than 20 kHz is used for melting or for impact. A frequency that is less than 80 is particularly preferred kHz, preferably less than 50 kHz, preferably less than 40 kHz and particularly preferably less than 35 kHz.

In a further preferred method, the closing process is monitored at least temporarily by means of a sensor device. In this case, for example, the power of the closing device or of the above-mentioned sonotrode can be measured. It would also be possible for a camera to be provided which monitors the closing process using ultrasound.

In a further, preferred method, the ultrasound generating device has a processing head which can be advanced onto the opening and has a surface facing the opening, in particular a curved or trough-like surface.

The processing head preferably has a surface which forces molten material in the direction of the opening to be closed. The molten plastic material and in particular the molten plastic material of the closure is preferably at least temporarily urged towards the opening during the melting process and is particularly urged in a radial direction of the closure towards the opening.

In a further preferred method, the ultrasound generating device is moved towards the closure in a direction of movement which encloses an angle with a direction perpendicular to the closure which, as mentioned above, is between 5 and 55 degrees, preferably between 10 and 40 degrees, preferably between 15 and 30 degrees and more preferably between 17 and 23 degrees. In a particularly preferred embodiment, the ultrasound generating device, which is in particular a sonotrode, is placed on the material to be processed at an angle of approximately 20 degrees.

In a further method according to the invention, at least one device of the device is inspected by means of an inspection device and/or at least one parameter which is characteristic of the production of the filled containers is monitored by means of a monitoring device.

In this configuration, it is proposed that either the device or its part of the system monitors itself, in particular and not just exclusively the penetration device, the loading device and/or the closing device and/or that the treated container is monitored, with pressure monitoring or the like can be made.

Alternatively and/or additionally, the actual treatment process can be monitored. In a preferred method, at least one value is output that is characteristic of the setup of the device and/or of the production of the filled containers. The device is particularly preferably controlled on the basis of this value.

In a further preferred method, the above-mentioned production of the opening in the closure and/or the loading and/or the closure takes place in a first operating mode of the device.

In one embodiment, in a second operating mode, at least one device of the application device is cleaned and/or sterilized by means of a cleaning and/or sterilization medium. In this embodiment, it is generally proposed that devices and/or system parts be sterilized and/or cleaned. This cleaning and/or sterilization can be carried out in particular by a cleaning and/or sterilization medium.

In a preferred method, the cleaning and/or sterilization takes place using a free-flowing cleaning and/or sterilization medium. As mentioned above, this can be, for example, steam, hydrogen peroxide or the like.

In a further preferred method, the cleaning and/or sterilization medium is made available by a stationary feed device. This feeding can particularly preferably take place during a movement of the loading device. However, it would also be possible for the cleaning and/or sterilization medium to be supplied when the application devices are in a stationary state. The cleaning and/or sterilizing agent is particularly preferably made available in the same way as the flowable medium with which the Containers are applied. The cleaning and/or sterilization medium is particularly preferably made available via a rotary distributor.

In a further preferred method, a pressure accumulator of the device is also cleaned using the cleaning and/or sterilization medium.

Furthermore, it is preferably also possible for several supply lines for the flowable medium to be cleaned with the cleaning and/or sterilization medium.

In a further embodiment of the method, the container is acted upon by the pressurizing device with a first pressure and a second pressure of the flowable medium that differs therefrom.

The container is preferably first subjected to a higher pressure and then to a lower pressure.

In a preferred method, the low pressure is provided by an accumulator device.

Fig. 1a-1h

schematische Darstellungen einer erfindungsgemäßen Vorrichtung zur Veranschaulichung eines durchzuführenden Verfahrens;

Fig. 2

Eine Darstellung einer erfindungsgemäßen Vorrichtung in einer schematischen Darstellung;

Fig. 3

Eine Seitenansicht der in Figur 2 gezeigten Darstellung;

Fig. 4

Eine weitere Seitenansicht der in Figur 2 gezeigten Vorrichtung;

Fig. 5

Ein Schaltplan zur Veranschaulichung eines Verfahrens;

Fig. 6

Eine grob schematische Darstellung einer erfindungsgemäßen Vorrichtung;

Fig. 7a,b,

zwei Ausgestaltungen von Ultraschallerzeugungseinrichtungen nach dem internen Stand der Technik der Anmelderin; und

Fig. 8a,b

zwei Darstellungen von Ultraschallerzeugungseinrichtungen in der erfindungsgemäßenAusführungsform.

Further advantages and embodiments result from the accompanying drawings:

Figures 1a-1h

schematic representations of a device according to the invention to illustrate a method to be carried out;

2

A representation of a device according to the invention in a schematic representation;

3

A side view of the in figure 2 shown representation;

4

Another side view of the in figure 2 device shown;

figure 5

A circuit diagram to illustrate a procedure;

6

A roughly schematic representation of a device according to the invention;

Fig. 7a,b,

two configurations of ultrasound generating devices according to the applicant's internal prior art; and

8a,b

two representations of ultrasound generating devices in the embodiment according to the invention.

Figure 1a shows a schematic representation of a device 1 according to the invention for treating containers. Only a closure 12 of the container is shown here. The device according to the invention has a penetration device 6 which is designed here as a needle and which is intended to pierce a predetermined area of the closure 12 . This penetration device 6 is movably arranged here on a drive device and can thus Figure 1a be delivered in a vertical direction to the closure and pierce it.

Reference number 104 designates a guide device, which serves to guide the penetration device 6 here. The reference number 102 roughly designates a guide cylinder, within which the penetration device 6 can be moved with its drive device 8 .

The reference numeral 19 designates a further drive device, which can also be moved in the vertical direction relative to a housing 18 as a whole. At the same time, pressure can be applied to the container by the application device 8 . Reference number 4 designates a closing device which is intended to close the container closure again after it has been pierced and filled with the gas.

In one embodiment, this closing device can have an ultrasound generating device 42 . This can be applied to the closure and this through Vibrations heat up locally to such an extent that the (plastic) material of the closure 12 melts

The reference number 300 denotes, roughly schematically, an inspection device which is suitable and intended for inspecting devices of the device 1 and/or also for inspecting a work result, for example a drilled hole. It is possible that such inspection devices are arranged in a stationary manner and the in Fig. 1a device shown moved past this.

However, it would also be conceivable. that the inspection facility is stationary opposite the in Fig. 1a device shown is arranged, for example on the transport device (not shown), on which the device itself is also arranged.

The reference number 302 denotes, roughly schematically, a monitoring device which monitors the process described above, for example by monitoring pressures, temperatures or other process parameters

At the in Figure 1b In the situation shown, no element of the device is placed on the container closure, so that this marks the start of a corresponding method.

At the in Figure 1c shown representation, the closure device, such as a temperature control element, is delivered to the closure, for example to melt or soften it. However, this step is optional.

At the in the Figure 1d In the situation shown, the closing device is reset again.

At the in Figure 1e In the situation shown, element 102 is first advanced onto closure 12. In this way, for example, sterilization of the closure 12 can be achieved, for example by sterilizing the surrounding areas in the area in which the opening is to be created, which can be done, for example, by UV light, as explained in more detail below, or by the action of heat or can also be done by a sterilization medium.

At the in Figure 1f In the situation shown, the penetration device 6 is used to pierce a hole in the container closure. At the in Figure 1g situation shown, the penetration device is withdrawn. An opening or hole 20 has now been created on the closure 12 . At the in Figure 1h Situation shown, this hole 20 is closed again. As mentioned above, this can be done by melting the material, but a sonotrode can also be used, which causes an even more favorable closing of the opening 20 .

figure 2 shows a representation of a device according to the invention. Here, a housing 30 is provided which, for example, has a linear drive unit for a needle and also the sonotrode. The reference number 4 again designates the closing device, which, as in figure 2 shown is guided obliquely and thus obliquely on the (not shown) container can be delivered. The reference number 32 designates a compressed air supply, which is used to actuate the pneumatic drive.

At the in figure 3 In the situation shown, in addition to the compressed air supply 32, a second connection 34 can also be seen, which can bring about the movement of the piston 36 as a whole.

The reference number 6 again designates the penetration device and the reference number 52 a temperature sensor which can monitor a temperature of the container closure, for example.

Reference number 102 designates a sterilization device, which is designed here as a pulsed UV lamp and which sterilizes the area of the opening that has been created or is to be created.

At the in figure 4 In the situation shown, a valve block is provided which can be used to supply the gas, for example nitrogen. In addition, this valve block can also be sterilized by means of a sterilization gas. Sterilization using H ₂ O ₂ is also possible.

Reference number 104 designates a cooling device for cooling the UV lamp or, in general, the sterilization device. This can be liquid cooling, for example.

The reference number 520 designates a pressurization space in order to seal the area between the closure and the compressed air application and in this way to apply the overpressure to the container closure and thus also to the container (not shown).

figure 5 shows a circuit diagram-like arrangement of a device with a treatment station. Here a container 10 is shown, which is acted upon by the compressed air. A loading chamber 520 is also provided, which can be provided with pressures p1 and p2 here by means of two compressed air lines. A pressure Px can first be supplied to a rotary distributor 430 via a pressure reservoir 514 by means of a control stage 508 and a control unit 512 .

This rotary distributor 430 distributes the compressed air to the individual containers or the individual loading devices. Reference number 500 designates the application device in its entirety.

Reference number 510 designates a pressure accumulator device which is provided for storing a specific pressure, either the higher pressure p1 or the lower pressure p2.

Reference number 516 designates a control valve which is suitable for controlling the pressure P emerging from the reservoir on the individual containers.

In addition, the cleaning function of the device is also shown. A reservoir 414 is provided here again, which can provide a cleaning agent such as steam, for example. The reference number 408 designates a valve which can bring about the supply of steam into the device 512, the rotary distributor 430, but also the individual lines of the application device 500.

figure 6 shows a schematic representation of a device 1 according to the invention. A transport device 2 is provided here, which can be embodied as a rotatable carrier. A multiplicity of treatment stations 40 are provided on this carrier, which, as mentioned above, can have the individual devices, such as the loading device and the like.

The reference number 430 again designates a rotary distributor and the reference number 510 roughly schematically the reservoir, which can be used to provide or to store a pressure stage.

The Figures 7a, 7b show a representation of an ultrasound generating device known from the internal prior art of the applicant. These each have a body 44 and a head 146 which, as can be seen here, has a curved and in particular hemispherically outwardly curved surface. As mentioned, a nice weld can be achieved with this round sonotrode shape, but, as is particularly the case in Figure 7b is shown, it can happen that molten material is forced outwards, i.e. away from the opening, and it is therefore not reliably closed. The reference M designates melted material of the container lid. It can be seen that this is pushed away from the opening as indicated by the arrow P10.

The Figures 8a, 8b show an advantageous embodiment of a sonotrode according to the invention. Here, two sonotrode elements 48 with surfaces 48a are provided on the head 46 . The one in the Figure 8a The tip or surface shown on the left is not used to carry out a work process, but is attached for reasons of symmetry. The reference character L refers to the longitudinal direction of the sonotrode (as well as to the direction in which the sonotrode is moved towards the closure. This means that the said concave shape is present on both sides of the sonotrode (in relation to the longitudinal direction L). As in Figure 8b shown, the concave configuration achieves a urging of a large part of the molten material M in the direction of the opening 20 or an urging of the material into this opening, with a secure sealing of the opening 20 thereby being achieved.

The reference symbol a designates the angle at which the sonotrode is advanced onto the cover.

The applicant reserves the right to claim all features disclosed in the application documents as essential to the invention, provided they are new compared to the prior art, either individually or in combination. It is also pointed out that the individual figures also describe features which can be advantageous in and of themselves. The person skilled in the art recognizes immediately that a specific feature described in a figure can also be advantageous without adopting further features from this figure. Furthermore, the person skilled in the art recognizes that advantages can also result from a combination of several features shown in individual figures or in different figures.

reference list

1

contraption

2

transport device

4

sealing device

6

penetration device

8th

application device

10

container

12

closure

18

Housing

19

drive device

20

Hole

30

Housing

32

compressed air supply

34

Second connection

36

Pistons

40

treatment stations

42

ultrasonic generating device

44

Body of the ultrasonic generating device

46

Head of the ultrasonic generator

48

sonotrode element

48a

surface

52

temperature sensor

102

guide cylinder

102

element

102

sterilization facility

104

guide device

104

cooling device

408

Valve

414

reservoir

430

rotary distributor

300

inspection facility

302

monitoring device

500

application device

508

control level

510

accumulator device

510

reservoir

512

control unit

514

pressure reservoir

516

control valve

520

pressurization room

P1

higher pressure

p2

lower pressure

PX

Print

M

melted material

P10

Direction of flow of the molten material

a

Angle of the infeed direction relative to the direction perpendicular to the closure 12

Claims (10)

1. Apparatus (1) for manufacturing filled containers (10) including a transport unit (2) that is suitable and designed for transporting containers (10) that are filled with a liquid and are closed with a closure cap (12), including a penetration unit (6) that is suitable and designed for generating an opening (20) in at least an area of the closure cap (12) and/or of the container (10), including an application unit that applies a flowable and in particular gaseous medium to an internal space of the container (10) through the opening (20) and a closing unit (4), which closes the opening (20), wherein the closing unit (4) has an ultrasound generation unit (42),

   the ultrasound generation unit (42) has a processing head (46) that can be fed towards the opening (20), with a surface (48a) that can be turned towards the opening (20),

   characterised in that

   the surface (48a) is formed concave curved for urging molten material in the direction of the opening (20) and that the ultrasound generation unit (42) includes a sonotrode, wherein two sonotrode elements (48) with concave curved surfaces (48a) are provided on the processing head (46).
2. Apparatus (1) as claimed in claim 1,
   characterised in that
   the closing unit (4) has a feed unit that feeds at least one component of the ultrasound generation unit (42) towards the opening.
3. Apparatus (1) as claimed in claim 1,
   characterised in that
   the ultrasound generation unit (42) is integrated, at least at times, into the container or the stamp (4) contacting the closure cap.
4. Apparatus (1) as claimed in at least one of the preceding claims, characterised in that
   the ultrasound generation unit includes a generator unit that is suitable and designed for generating ultrasound having a frequency of more than 20 kHz, and/or in that the ultrasound generation unit includes a generator unit that is suitable and designed for generating an ultrasound having a frequency of less than 80 kHz.
5. Apparatus (1) as claimed in at least one of the preceding claims, characterised in that
   the apparatus (1) has a sensor unit that determines at least one parameter that is characteristic of the ultrasonic welding process.
6. Apparatus (1) as claimed in at least one of the preceding claims, characterised in that
   the ultrasound generation unit (42) can be fed towards the opening (20) in such a way that a longitudinal direction of the ultrasound generation unit (42) encloses an angle (a) with a direction that is perpendicular to a surface of the closure cap (12), which is between 5° and 50°, preferably between 10° and 40°, preferably between 15° and 30° and preferably between 17° and 23°.
7. Method for manufacturing containers (10) that are filled with liquids and closed, wherein a transport unit (2) is used to transport containers (10) filled with a liquid and closed with a closure cap (12), and a penetration unit (6) is used to produce an opening (20) in at least an area of the closure cap (12) and/or of the container (10), and an application unit is used to apply a flowable and in particular gaseous medium into an internal space of the container (10) through the opening (20), and subsequently the opening (20) is re-closed using a closing unit, the closing unit closes the opening (20) by the effect of ultrasound,

   the ultrasound generation unit (42) has a processing head (46) that can be fed towards the opening (20), with a surface (48a) that can be turned towards the opening (20),

   characterised in that

   the surface is formed concave curved for urging molten material in the direction of the opening (20) and that the ultrasound generation unit (42) includes a sonotrode, wherein two sonotrode elements (48) with concave curved surfaces (48a) are provided on the processing head (46).
8. Method as claimed in claim 7,
   characterised in that
   at least one component of the closing unit contacts an area of the opening (20), at least at times, during the closing process.
9. Method as claimed in at least one of the preceding claims 7 to 8, characterised in that
   the closing unit sets, at least at times, at least a section of the container or of the closure cap (12) into mechanical vibration.
10. Method as claimed in at least one of the preceding claims 7 to 9, characterised in that
    the closing process is monitored, at least at times, by means of a sensor unit.

Images