Apparatus and method for joining multi-part tampon applicators - Patents.com

Abstract

The present invention relates to an apparatus for joining multi-part tampon applicators, particularly an apparatus for joining a three-part tampon applicator comprising at least one outer barrel 101 and a first inner barrel 102. The apparatus comprises at least one joining station having at least one receiving finger for receiving one outer barrel and one first inner barrel 102, respectively, as well as a first inner barrel feeder for loading the first inner barrel onto the receiving finger and an outer barrel feeder for loading the outer barrel 101 onto the receiving fingers 13.1, 13.2. The apparatus further comprises a processing station 16 for joining the outer barrel to the first inner barrel 102, the at least one joining station being arranged radially on a circular disk, particularly such that the at least one receiving finger is essentially radially oriented. The present invention also relates to a method for joining multi-part, particularly three-part, tampon applicators.

Description

[Technical field]

[0001] The present invention relates to an apparatus for joining multi-part tampon applicators as well as a method for joining multi-part tampon applicators, particularly both three-part tampon applicators. [Background technology]

[0002] Tampon applicators are insertion aids for tampons. In their simplest embodiment, tampon applicators are cylindrical tubes into which the tampon is placed. They have a distal mouth opening through which the tampon is expelled after it has been placed in the body orifice. Tampon applicators often comprise a corresponding plunger for this purpose. In the simplest embodiment, this plunger may also be designed as a tubular barrel, in this case an inner barrel.

[0003] Such two-part tampon applicators may further include a withdrawal mechanism. In such typically two-part embodiments, the inner barrel is initially disposed substantially within the outer barrel and may, in some cases, initially contain a tampon. In operation, the inner barrel is first pulled through a proximal opening of the outer barrel until a pre-tensioned mechanical gripping device engages the tampon. Typically, a stop is provided at the proximal end of the outer barrel so that the inner barrel cannot be withdrawn too far. When this engagement creates a gripping connection between the inner barrel and the tampon, pushing the inner barrel back into the outer barrel displaces the tampon from the outer barrel and allows the tampon to be expelled through the oral opening and into the body orifice.

[0004] In most cases, tampon applicators are made of a plastic material and have a gripping area at a suitable location, for example in the proximal region of the barrel. Improved gripping properties can be ensured by roughening the material, rubberizing, special structuring or recessed grips.

[0005] In addition to two-part, three-part, or even multi-part design tampon applicators, the plunger can be constructed to be at least partially telescopic, for example, by providing multiple inner barrels that can initially be displaced relative to one another on bearings and become rigid plungers after mutual engagement.

[0006] All of these telescoping designs of the tampon applicator serve, among other things, to make the tampon with the tampon applicator more compact overall.

[0007] In order to provide a tampon applicator that has an adequate gripping area and is as compact as possible, three-piece tampon applicators have proven to be particularly useful. These tampon applicators essentially comprise three tubular barrels. The outer barrel has a tapered head that terminates in a distal opening from which the tampon is expelled during operation. The proximal portion of the outer barrel has a gripping recess or other tapered portion that facilitates holding the tampon applicator, particularly when the tampon is expelled, i.e., when the plunger is used to expel the tampon from the barrel. The plunger is generally housed in two parts, with the first inner barrel supported within the outer barrel in a storage state and housing the second inner barrel. To move the tampon applicator from the stored state to a ready-to-use state, the second inner barrel, preferably having a gripping area, is withdrawn from the first inner barrel until it nests and engages with the grooves and / or flanges, for example by forming corresponding grooves and / or flanges in the first and / or second inner barrels. Finally, the second barrel is also withdrawn slightly from the gripping area of ​​the outer barrel and into operable connection with the tampon such that new insertion of the now latched plungers from the two inner barrels causes displacement of the tampon, forcing it from the mouth area of ​​the outer barrel into the body orifice.

[0008] To join the parts, it is advantageous if certain structures are first induced into one another without friction, i.e. without the need to overcome mechanical resistance, followed by a thermoplastic deformation, which completes the joining process and joins the individual applicator parts to one another in a longitudinally displaceable manner.

[0009] A crucial factor in the manufacture of tampon applicators is to produce them as efficiently as possible whilst maintaining the consistently high quality expected of such hygiene products.

[0010] Therefore, there is a need for devices and machines suitable for joining such multi-part tampon applicators so that they can be later fitted with appropriate tampons and delivered for packaging.

[0011] Basically, such an apparatus is a linear joining line, where different parts are joined together in stages. However, this has proven to be disadvantageous, since the space requirements are relatively high and it is cumbersome to monitor the process to ensure quality. Summary of the Invention

[0012] The object of the present invention is to provide a device in which at least one of the known drawbacks is overcome. A particular object of the present invention is to provide a device of the initially mentioned type, which allows joining a large number of pieces to a tampon applicator while maintaining a constant quality.

[0013] At least one of these objects is solved by the features of the independent claims.

[0014] This object has been solved by a device for joining multi-part tampon applicators, in particular three-part tampon applicators, and a corresponding method according to the characterizing portions of the independent claims.

[0015] One aspect of the present invention relates to an apparatus for joining a multi-part tampon applicator, in particular an apparatus for joining a three-part tampon applicator. The multi-part tampon applicator includes an outer cylinder and a first inner cylinder. The apparatus comprises at least one joining station, each having at least one receiving finger for receiving one outer cylinder and one first inner cylinder. The apparatus according to the present invention further comprises a first inner cylinder supply for loading at least one first inner cylinder into the at least one receiving finger. The apparatus according to the present invention further comprises an outer cylinder supply for loading at least one outer cylinder into the at least one receiving finger. The first processing station is used for joining at least one outer cylinder to at least one first inner cylinder. The at least one joining station is arranged radially on a circular disk. In particular, the at least one joining station is arranged on the circular disk such that the at least one receiving finger is substantially radially oriented.

[0016] For the purposes of the present invention, a multi-part tampon applicator can be understood as a tampon applicator of the initially mentioned kind. Such an applicator essentially comprises an outer barrel, which constitutes the distal end of the tampon applicator during operation and has as its distal end a mouth opening through which the tampon is expelled. Furthermore, such a tampon applicator in this example comprises at least a first inner barrel, which has a diameter smaller than the inner diameter of the first outer barrel, so as to be supported and movable in the longitudinal direction of the tampon applicator. Particularly preferably, the first inner barrel is guided in its translational movement in the longitudinal direction. This can be done, for example, by another barrel, in this example by the outer barrel.

[0017] The sheath according to the present invention may be provided with any other structure. For example, the sheath may have a petal-shaped structure in the distal mouth region that allows the distal mouth region to be closed. Furthermore, the sheath may be provided with a knob, a rubber lining, a roughening, a depression or other concave grip that facilitates handling of the sheath and the entire tampon applicator. In this example, the tampon applicator according to the present invention may have a tapered sheath at the proximal end. This tapered region may be provided with named structures to facilitate gripping. In operation, the tampon applicator is gripped and inserted at this tapered region, and actuation of the first and / or second inner barrels by displacement of said first and / or second inner barrels along the longitudinal axis of the tampon applicator results in expulsion of the tampon, in particular by the petal-shaped element of the distal mouth opening.

[0018] For the purposes of the present invention, a joint occurs when the parts have stops relative to each other, preferably in both translational directions along the longitudinal axis. This can be done, for example, by flanges, grooves, and / or ribs that prevent the movement of the parts beyond a certain locking point. This joining can mean that a certain detent point is formed, for example the individual parts can enter into a rigid operable connection with each other. For example, a three-part tampon applicator is conceivable, comprising an outer barrel, a first inner barrel, and a second inner barrel. The outer barrel has a larger outer diameter than the first inner barrel, and the second inner barrel has a smaller outer diameter than the first inner barrel. Overall, both the second and the first inner barrels have a smaller diameter than the first outer barrel so that they can be slid into the outer barrel. In this embodiment, the first and second outer barrels form a telescopic plunger for expelling the tampon from the outer barrel. For this purpose, in a first step, the second outer barrel is pulled proximally from the first inner barrel until it is substantially rigid via a snap-fit ​​connection with the first inner barrel. The first barrel is also withdrawn from the barrel until its distal end operatively contacts the distal end of the tampon. When the entire plunger is now pushed back into the barrel, this active connection creates pressure on the distal end of the tampon, forcing it out of the first barrel, through an opening in the distal end of the first barrel, and into the body orifice.

[0019] A joint in the sense of the present invention exists in this three-part tampon applicator if all three parts can perform the above-mentioned translatory movement, but the second inner cylinder is prevented from falling off the first inner cylinder or the first inner cylinder from falling off the outer cylinder. For this purpose, a stop can be provided on the inner circumference of the outer cylinder or the first inner cylinder. Furthermore, a corresponding flange can be provided on the outer circumference of the first inner cylinder and the second inner cylinder, which operably connects with this stop. The concentrically arranged cylinders can move in translation relative to each other, but cannot move apart. Such a tampon applicator is a product of a corresponding device according to the present invention. This tampon applicator can be loaded with a tampon in the further course of the process. In a particular embodiment, such a joint in the sense of the present invention is obtained, for example, by a conical expansion of the proximal end of the second inner cylinder.

[0020] For purposes of the present invention, the terms distal and proximal should be understood in relation to the application of the user. In this particular case, for example, the proximal end is the end that faces the user's hand. The distal end is the end that faces the body orifice in use.

[0021] In a particular embodiment, the at least one joining station is arranged radially on the circular disk such that the processing circumference can be moved from the circular disk during operation by rotating the circular disk around its circular center. Particularly preferably, the first inner cylinder supply, the outer cylinder supply and the first processing station are also arranged radially outside the processing circumference.

[0022] Within the meaning of the present invention, if there is a radial orientation, e.g. each outer finger is arranged substantially parallel to a radius of a circular disc with respect to its longitudinal extension, then at least one receiving finger is each substantially radially oriented.

[0023] By means of the device according to the invention, the joining of the multi-part tampon applicator can be efficiently performed by a rotatable circular disk, which provides the joining station with corresponding receiving fingers to the supply and the individual processing stations, and the ejector, respectively, so that an operable connection can be established between the supply, the individual processing stations, and the ejector and the joining station. Due to the circular design, the whole device is space-saving and can be operated in large quantities.

[0024] In a particular embodiment, a plurality of joining stations are provided radially on the circular disk. Particularly preferably, the joining stations are arranged essentially radially symmetrically on the circular disk, such that imbalances are largely avoided when the circular disk rotates.

[0025] In another particular embodiment, the bonding station according to the invention comprises a plurality of receiving fingers, so that the device according to the invention can bond in batches by simultaneously allocating a batch of tampon applicators to a processing station depending on the number of receiving fingers on the bonding station.

[0026] In a particular embodiment, the multi-part tampon applicator includes a second inner barrel. The apparatus then further includes a second inner barrel supply for loading at least one second inner barrel onto the at least one receiving finger. Additionally, the apparatus further includes a second processing station for joining at least one first inner barrel to at least one second inner barrel. In this embodiment, the apparatus is used to join a three-piece tampon applicator.

[0027] In certain embodiments, the first processing station is configured to reshape the first or second inner cylinder.

[0028] In certain embodiments, the second processing station is equipped to form the first or second inner cylinder.

[0029] In certain embodiments, the invention includes a plurality of processing stations, each adapted to always form a proximal inner barrel. In the example of a three-part tampon applicator, it is always the second inner barrel that is formed. In further embodiments, each processing station may be configured to form the second inner barrel to a predetermined dimension. In this manner, reshaping of the second inner barrel may be performed gently, resulting in better reshaping.

[0030] In a particular embodiment, the processing station is configured to perform a conical expansion as the forming operation.

[0031] In certain embodiments, at least one receiving finger includes multiple diameters. Specifically, the receiving finger has a radially tapered diameter.

[0032] In certain embodiments, each diameter is configured to receive a respective outer barrel, a first inner barrel, and / or a second inner barrel.

[0033] Correspondingly, from inside to outside, i.e. in the radial direction of the circular disc, these are a first diameter portion suitable for receiving an outer cylinder, a second diameter portion suitable for receiving a first inner cylinder, and a third diameter portion suitable for receiving a second inner cylinder.

[0034] In this case, all the tubes are designed as hollow tubes comprising an inner cavity which is filled substantially according to the diameter of the receiving finger when the latter receives the corresponding tube.

[0035] In operation, the receiver fingers are loaded from the inside out, i.e., for example, the second inner barrel is first applied to the smallest diameter of the receiver finger in the case of a three-part tampon applicator. The first inner barrel then slides over the second inner barrel and is guided in the opposite radial direction over the intermediate diameter of the corresponding receiver finger. Finally, the outer barrel slides over both inner barrels to the diameter of the corresponding receiver finger.

[0036] In certain embodiments, the receiving fingers have a number of shoulders that act as stops to define the appropriate diameter for receiving the barrel.

[0037] In another particular embodiment, the receiving finger has a tapered tip, which may have a tapered design, for example, to make it easier to receive and guide the barrel.

[0038] In certain embodiments, the diameters are limited from one another by shoulders as stops that taper to a smaller diameter.

[0039] The length of the range of various diameters of the receiving finger is 1 / 3 to 80% of the length of the corresponding second inner cylinder.

[0040] In certain embodiments, the receiving fingers are configured to expand when the second bushing is placed over the receiving fingers.

[0041] In another particular embodiment, the receiving fingers are configured such that the second inner cylinder is retained on the receiving fingers by static friction.

[0042] Particularly preferably, the second shim has an outer flange which penetrates into a bearing joint with the first shim when the first shim slides over the receiving finger on the second shim.

[0043] In a particular embodiment, the receiving fingers are designed to be heatable. Particularly preferably, the receiving fingers can be heated to a temperature that allows the material of the applicator part to be formed. In particular, the receiving fingers can adopt a temperature between 80° and 180° and thus form the applicator part when the applicator parts are mated and an external pressure is applied. A processing station applying this external pressure is particularly preferred.

[0044] In an alternative and / or complementary embodiment, the applicator parts are joined without forming. For this purpose, the applicator parts, in particular the outer barrel and the first inner barrel, may be equipped with a snap-fit ​​mechanism that allows a purely mechanical joining. In this embodiment, the processing station may be configured, for example, to apply a kinetic force to the proximal end of the barrel, in particular a kinetic force that allows the outer barrel and the first inner barrel and / or the first inner barrel and the second inner barrel to form a snap-fit ​​connection. This device may be particularly well suited for joining applicators that are substantially made of a non-thermoplastic material, such as including cardboard, or made of cardboard.

[0045] In alternative and / or complementary embodiments, one or more processing stations are designed to set a corresponding temperature range between 80° C. and 180° C. and perform a corresponding forming operation. For example, one skilled in the art can set the temperature range depending on the material properties of the inner cylinder to be formed.

[0046] In certain embodiments, the at least one receiving finger comprises at least one clamping mandrel for holding the outer barrel and / or the first inner barrel.

[0047] In particular, the clamping mandrel can be formed with a holding force acting on the corresponding tube to hold it in place. Particularly preferably, the clamping mandrel is movable, pivoting about an axis on the receiving finger or is designed to be spring-loaded.

[0048] The clamping mandrel can be configured, for example, to collapse when the tube is received such that the clamping mandrel does not offer resistance to receiving the tube. Once the tube is received, the mandrel can act on the tube, for example, via a spring-loaded retaining force, to hold the tube in place.

[0049] In this particular embodiment, the clamping mandrel may be repositioned for ejection so that it is folded and substantially flush with the receiving fingers such that stripping of the finished joined tampon applicator is not prevented.

[0050] In an alternative or complementary embodiment, the clamping mandrel is designed as a bracket which holds the loaded tube in place with a restoring force.

[0051] In a particular embodiment, the first and / or second processing station is configured to form the outer tube, the first inner tube and / or the second inner tube received in the receiving fingers. Particularly preferably, this forming is a thermoforming. Most preferably, the thermoplastic material is softened by supplying heat so that the melting process does not yet take place, but the material as a whole can be more easily formed.

[0052] In a particular embodiment, the apparatus comprises a plurality of bonding stations, in particular between 2 and 24 bonding stations.

[0053] A batchwise processing of several batches can be carried out simultaneously using several joining stations. For example, one batch can be loaded while another batch is already being formed. Particularly preferably, the number of joining stations corresponds to the maximum geometrically possible processing stations and supplies. It is also conceivable that individual joining stations are provided as reserves. Furthermore, individual joining stations may not have a corresponding processing station on the opposite side, for example if cooling is performed. For example, initially a joining station may not have a corresponding processing station and / or consumables as counterparts after the rotation of the circular disk, if cooling of the previously formed parts has to be performed instead after the thermoforming operation.

[0054] In a particular embodiment, the supply and / or processing stations are constructed radially around a circular disk, so that the supply and / or processing stations occupy an angular region by being arranged opposite the joining station. Particularly preferably, the supply or processing station is provided with a supply element or processing element arranged essentially concentrically to the receiving fingers on the joining station in the same angular range. For example, the supply can guide the tubes to be attached to the receiving fingers in a number of paths equal to the number of receiving fingers. This allows a parallel and simultaneous loading of all receiving fingers of the joining station. Alternatively and / or additionally, the receiving fingers of the joining station can also be loaded successively, i.e. by a supply which loads the receiving fingers one after the other within its angular range. For this purpose, the supply can be designed, for example, to pivot such that a first device concentrically aligned with the receiving finger is followed by a pivoting movement with a new concentric alignment with the second receiving finger.

[0055] In a particularly preferred embodiment, the apparatus comprises 2 to 24 joining stations, in particular 4 to 20, most preferably 12 joining stations.

[0056] In another particular embodiment, each joining station has a number of receiving fingers, each for receiving an outer barrel of a first inner barrel and possibly a second inner barrel.

[0057] Particularly preferably, each joining station has a number of receiving fingers between 2 and 16, even more particularly preferably between 4 and 8 receiving fingers, most preferably 4 receiving fingers.

[0058] In certain embodiments, the supply parts disposed on the processing stations or the processing stations correspond to the number of receiving fingers and are aligned such that they are concentrically disposed with the receiving fingers when the joining station is operably connected to the processing stations or the supply parts within the corresponding angular range.

[0059] In a particular embodiment, the processing station is designed as a pressing knob that uses pressure and heat to reshape the received inner barrel in correspondence with the receiving finger. Particularly preferably, the pressing knob has a generally conical flare that is pressed into the proximal end of the inner barrel for forming.

[0060] In a particular embodiment, the feed section comprises at least one separation unit, which can be used to transfer the corresponding tubes as orderly as possible to the equipment, which can load the appropriate tubes as elements of the feed section into the receiving fingers. The separation can be achieved by different methods, for example a shaker hopper and appropriate belts or belt guides can be used to allow proper alignment of the tubes.

[0061] In a particular embodiment, the supply has sliders suitable for loading the tubes onto the receiving fingers. These sliders can be designed as plungers that press the tube onto the receiving fingers. They can also be designed as grippers that grip the circumference of the tube and slide it over the receiving fingers.

[0062] For example, if the tube has flanges, the flanges can be used to align the tube accordingly. In this example, for example, the belt drive is such that the tube passes substantially through the belts and is held in place by the flanges between the belts. The flanges rest on two spaced apart belts. The belt spacing essentially corresponds to the outer diameter of such tube.

[0063] In the case of tubes without flanges, for example external tubes, alternative sorting machines can be used to separate the corresponding tubes. These tubes can be guided on spaced belts. The belt spacing here, however, does not correspond to the external diameter of the tube, but is slightly smaller so that the tube rests on the belt. Separation can be performed, for example, by rollers. Thus, a transition area can be defined in which the tubes are conveyed at two different speeds, particularly preferably in which the tubes are accelerated in the transition area from a first speed to a second speed. Such acceleration separates any interconnected external tubes by accelerating in the conveying direction the first tube, which leaves the following tube and comes into contact with it at the new speed.

[0064] Particularly preferably, such a feeder comprises a belt system driven by rollers and conveying the tubes towards the equipment elements. As pressure rollers, these rollers can also operate at different speeds so as to be able to separate the tubes.

[0065] A suitable conveyor system using a belt to transport the applicator can be found by the skilled artisan in WO 2019 / 233989.

[0066] In a particular embodiment, the supply according to the invention further comprises an alignment unit, which for example allows for accurate alignment of barrels with different kinds of ends for loading, such as barrels with petal-shaped mouths and gripping areas, etc. Particularly preferably, the alignment is detected by an optical sensor.

[0067] In a particular embodiment, the alignment unit comprises a robot, in particular a multi-axis robot, as alignment unit.

[0068] In a more specific embodiment, the alignment unit includes a robot that aligns each of the attached outer barrels so that the mouth opening faces in the opposite direction to the radial extent of the receiving finger, i.e., so that the mouth opening is oriented upward toward the receiving finger and the distal end of the tampon applicator moves first over the receiving finger.

[0069] In certain embodiments, the circular disk is rotatable such that the joining station can be brought into operative connection with the radially arranged inner cylinder supply, outer cylinder supply, first and / or second processing stations.

[0070] In addition to the belts described, belt drives with corresponding guide rails may be used to guide the tubes in alternative or supplemental embodiments.

[0071] In a particular embodiment, the processing station is integral with the supply. In this embodiment, forming occurs simultaneously with the receiving fingers being equipped with the corresponding barrels. For example, the second barrel can be applied to the receiving fingers first. The first barrel is then slid over the second barrel and applied to the receiving fingers while the proximal end of the second barrel is heated to create a stop that prevents the first barrel from falling off the second barrel again. Similarly, forming can occur simultaneously with the loading of each barrel, such that joining and loading occur synchronously.

[0072] In another particular embodiment, the loading is done via a suitable supply and only one processing station performs all the forming steps in a single process. For example, the receiving fingers can be loaded so that no force is yet applied to the individual tubes. After all the tubes are applied to the receiving fingers, pressure is applied in a single step by supplying heat, which reshapes the corresponding tube portions being formed and completes the joining.

[0073] An apparatus according to the present invention can be used to quickly and efficiently join multi-part tampon applicators in batches, which can be accomplished in a space-saving and efficient manner.

[0074] The device according to the invention is particularly suitable for joining retractable three-part tampon applicators. As mentioned above, these tampon applicators have an outer barrel for housing the tampon and an opening through which the tampon is expelled into the body orifice. In addition, they preferably have a gripping area proximal to the outer barrel and forming a tapered area. This area can preferably serve as a bearing for guiding a first inner barrel, which in the packaged state is housed almost completely within this gripping area. This inner barrel houses a second inner barrel which is also guided by this inner barrel. A snap-fit ​​mechanism at the proximal end of the first inner barrel allows the second inner barrel to be securely snapped onto the second inner barrel when the second inner barrel is telescopically telescoped from the first inner barrel. When the plunger obtained from these two inner barrels is now pushed again into the outer barrel, the tampon is expelled through the opening into the body orifice.

[0075] Another aspect of the invention relates to a method for joining a multi-part tampon applicator, in particular a three-part tampon applicator as mentioned at the outset. The method comprises a step of aligning a joining station with a first inner tube supply. Alignment can mean, for example, in the sense of the invention, substantially aligning with this supply, in view of the above-mentioned device, such that the joining station enters the angular region of the supply and an operable connection can be established between the supply and the joining station. The method according to the invention further comprises a step of loading a first receiving finger of the joining station with a first inner tube. The device can be carried out in batches, i.e. any number of receiving fingers of the joining station can be loaded with inner tubes at the same time, or it can be carried out continuously in that the receiving fingers are moved away from the device station and one after the other receiving fingers are provided with inner tubes.

[0076] The method according to the invention then comprises the further step of aligning the joining station with the outer barrel supply or with a second inner barrel supply, the latter being for example the case for a three-part tampon applicator, where a separate inner barrel is first applied and can be attached accordingly, for example to the gripping area of ​​the outer barrel, as described above.

[0077] The alignment of the joining stations arranged radially on the circular disk is performed by a circular rotation of the circular disk. This may mean, for example, that the circular disk is rotated around its center in a certain angular range. Preferably, this rotation is timed. Alternatively and / or additionally, this rotation may be continuous, as long as the control of the corresponding processing stations is adapted, for example by synchronization with the rotation of the circular disk. Even with a continuous rotation, there is a point in time when a processing station or a supply is aligned concentrically with a corresponding receiving finger. At this point, the corresponding processing or loading can take place.

[0078] Particularly preferably, the joining stations arranged radially on the circular disk are aligned in such a way that the receiving fingers are coaxially operatively connected to the inner and / or outer cylinder supply and / or the processing station.

[0079] Particularly preferably, this is done simultaneously for several joining stations of each joining station, i.e. one joining station aligns its receiving fingers concentrically with the first supply while at the same time another joining station aligns its receiving fingers concentrically with the second supply. In this way, for example, receiving fingers that are already loaded with a second inner tube can be loaded with a first inner tube at the same time, while receiving fingers that are already empty are again ready to receive the first inner tube.

[0080] In a particular embodiment, the method according to the invention further comprises aligning the joining station with a processing station, which is preferably a forming station. The method thus further comprises forming the first inner cylinder and / or the second inner cylinder by applying heat and pressure. As mentioned above, these steps can be performed synchronously. Particularly preferably, the processing station comprises a pressing knob that can be operatively connected to the processing station, for example the inner cylinder on the receiving finger.

[0081] In certain embodiments, the inner barrel having the smallest diameter of the multi-part tampon applicator is loaded first onto the first receiving finger when loading into the bonding station, specifically, the inner barrel having the smallest diameter is fitted first onto the tip region having the smallest diameter of the receiving finger.

[0082] In another particular embodiment of the method according to the invention, the outer sleeve is clamped onto the receiving finger by a clamping mandrel exerting a restoring force, particularly preferably releasably clamped.

[0083] In more specific embodiments, this release can be actuated by control of a pivot point attached to the receiver finger, for example, the clamping mandrel being flush with the receiver finger against a restoring force, so that the receiver finger does not attempt to resist expulsion of the finished tampon applicator.

[0084] In an alternative embodiment, the receiver is applied to the receiver fingers against the restoring force of the clamping mandrel such that when the detent is released, this restoring force produces ejection of the completed tampon applicator.

[0085] It is obvious to those skilled in the art that all of the above-mentioned embodiments, unless they are mutually exclusive, can occur in any combination with each other in the realization of the present invention.

[0086] The invention will now be described in more detail with reference to specific examples and drawings, without being limited thereto.

[0087] Those skilled in the art can deduce further advantageous embodiments for the design of the present invention from these examples.

[0088] The drawings are schematic and, for simplicity, identical parts are given the same reference numerals. [Brief description of the drawings]

[0089] [Figure 1a] It is a circular disk with multiple bonding stations. [Figure 1b] 1b is the circular disk of FIG. 1a in plan view. [Figure 2a] 1 is an example of a bonding station aligned with a processing station. [Figure 2b] FIG. 2a is a detailed view of the aligned bonding station. [Figure 2c] 2b shows the bonding station of FIG. 2a in a top view. [Diagram 3] 1 is a splicing station according to the invention in a front view. [Figure 4a] FIG. [Figure 4b] 4b shows the receiving finger of FIG. 4a loaded with two inner cylinders. [Figure 4c] 4b is the receiving finger of FIG. 4a with all parts of a three-part tampon applicator loaded. [Diagram 5] It is a separate unit. [Figure 6] This is an alignment unit. [Figure 7] A processing station. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0090] FIG. 1a shows a schematic representation of a circular disk 11. The circular disk 11 is designed as an annular disk and is the central element of the device according to the invention. In this example, the circular disk 11 has a number of joining stations 12. In particular, in this example, there are twelve joining stations 12. The joining stations 12 are arranged radially on the circular disk 11, essentially along the circumference of the circular disk 11. In this example, the circular disk 11 exhibits a central recess, but this is not essential. Preferably, the circular disk 11 is driven in rotation. This can be done, for example, by a toothed gear (not shown) on the underside of the circular disk 11. Also conceivable are drives by belts, electric drives or circular motors with corresponding active connections between the axles and the circular disk 11.

[0091] The joining station 12 has a number of receiving fingers. In this example, the joining station 12 has a total of four receiving receiving fingers 13.1, 13.2. The receiving fingers 13.1, 13.2 extend essentially radially from the center of the circular disk to its outer periphery. In this way, the joining station 12 and the corresponding receiving fingers 13.1, 13.2 can be put into operative connection with a processing station or a supply unit that is also provided radially outside the circumference. The corresponding equipment, i.e. the number of joining stations and the number of corresponding receiving fingers, can be adapted by the person skilled in the art to the geometrical conditions and the corresponding available supply or processing station. In this example, the receiving fingers are all provided substantially on one plane. However, joining stations with vertically offset receiving fingers or even staggered receiving fingers are also conceivable. Such joining stations can be built, for example, floor by floor with a certain number of receiving fingers on one level.

[0092] In FIG. 1b the station element 10 according to FIG. 1a is shown in a top view. The circular disk 11 has a central recess 14, which serves mainly to reduce the moving mass. A total of twelve joining stations 12 are mounted on the circular disk 11 and comprise a joining block 12.1 with four receiving fingers 13.1, 13.2 protruding from the outer periphery of the circular disk 11 into a processing area, in which for example feeders and processing stations can be interposed, which can carry out single or multiple operations on the tubes which are first fixed on the receiving fingers. The processing steps can include further loading, forming, embossing, impregnation, coating, perforation and / or ejection of the tubes. Due to the fact that the processing is carried out on a radius, the present station 10 can be used in a space-saving manner. A robot can optionally interpose in the area of ​​the circular disk 11 to carry out any necessary operations at the joining stations. In the processing area, i.e. directly on the outer periphery of the circular disc 11, a drop-through can be provided, for example to collect and remove defective tubes or tampon applicators after successful ejection. Alternatively, this area can be used to receive finished tampon applicators that are peeled off from the receiving fingers after the bonding is completed.

[0093] The compact design enables the optical sensor to survey the entire processing area. This means that the work steps can be constantly monitored and it is possible to intervene early if any faults occur. Optical sensors can also be used at several points for detailed monitoring of the individual processing steps. For example, the final forming operation can be monitored using optical sensors. It is possible, for example, to see if incorrectly formed tampon applicators are present in a batch and to sort them accordingly.

[0094] In FIG. 2a, for the sake of simplicity, a circular disk 11 is shown with a single joining station 12. Four receiving fingers protrude from this joining station 12 into the processing area. This joining station 12 moves within an angular range and thus operatively connects with a processing station 16. The processing station 16 has a number of presses 17 aligned concentrically with the receiving fingers. The presses 17 may, for example, be oriented so as to cause the formation of the proximal end of the tampon applicator. The second inner tube, correspondingly fitted to the outermost and smallest diameter parts of the receiving fingers 13, is expanded and reshaped in the proximal direction, for example by the corresponding fitting shape of the pressing knob 17, so that a natural stop is created. The presses 17 are attached to a block 15 and rest on a plate 18. The plate 18 is arranged to move against the radius of the circular disk 11. Alternatively, the joining stations can also be moved radially relative to the corresponding processing stations.

[0095] 2b shows this arrangement again in more detail. In this example, two joining stations 12 are shown on a circular disk 11 having a plurality of receiving fingers 13, a total of four. Concentrically and essentially parallel to the radial extension A of the circular disk 11, a pressure knob 17 is arranged on a processing plate 15 of a processing station 16. This pressure plate 15 is movable so that it can move against the radial extension A towards the receiving fingers 13 and thus exert a forming action on the loaded tube.

[0096] In Fig. 2c this device is shown in plan view, where a circular disk 11 comprises said guide station 12 with four radially extending receiving fingers 13, the longitudinal direction of which is concentric with a pressure knob 17 on a processing plate 15. The processing plate 15 is mounted on rails so that it can be displaced on a locking plate 18 in the direction of the receiving fingers to generate a contact pressure on the receiving fingers.

[0097] FIG. 3 shows in detail the corresponding joining station 12, which here has four sleeves 12.2, from each of which a receiving finger 13 projects. The receiving finger 13 has a number of diameters 31, 32, 33. Starting from the sleeve as a whole, the finger 13 has a first diameter 33. On this first diameter two clamping mandrels 35, 34 are provided. This first diameter 33 is suitable for receiving an outer tube. The two clamping mandrels 33, 34 serve to hold this outer tube by means of a restoring force. During operation, the outer tube in this example is the last tube to be applied to the receiving fingers.

[0098] The first diameter section is followed by a second diameter section 32 that is smaller than the inner diameter of the first barrel. In operation, the first barrel is the second barrel given in this example that refers to a three-piece tampon applicator.

[0099] Immediately adjacent to this second diameter is a third diameter which tapers over a shoulder and terminates in a tip 36. This final diameter 31 is adapted to receive a second inner barrel.

[0100] In operation, the second outer barrel is first slid onto this final diameter 31. Starting at the central diameter 32, through the tapered region, the second inner barrel is subsequently releasably clamped onto the receiving fingers.

[0101] To illustrate this operating mode, figures 4a-c show this step-by-step loading. Figure 4a shows a side view of the receiving finger 13. On the left side of the sleeve 12.2 the joining station begins. A first diameter 33 protrudes from the sleeve 12.2 with two clamping mandrels 35, 34 formed as brackets. The two clamping mandrels 35, 34 exert a restoring force on the receiving finger so that the outer tube is held after receiving it.

[0102] The first diameter 33 closes at a stop followed by a second diameter 32. The second diameter 32 is followed by another stop and a taper to a third diameter 36. The receiving fingers terminate in a substantially tapered tip 31.

[0103] In Fig. 4b, the two shims 102, 103 are already applied to the receiving fingers. The second shim 103 is slid over the last diameter first so that it abuts against a stop and jams in the tapered region. The first shim 102 is slid over the last diameter, which extends substantially to the end of the second diameter.

[0104] Now, FIG. 4 c shows how the outer cylinder slides over these two inner cylinders 102 , 103 .

[0105] The clamping mandrels 35, 34 formed as brackets exert a restoring force on the outer tube 101. In this case, the first bracket part 35 projects obliquely from the sleeve 12.2 and exerts a contact pressure on the outer tube 101. The second bracket part 34, which is integral with the first bracket part 35, also projects obliquely and serves as a steering plate for receiving the outer tube 101.

[0106] Figure 5 shows a separation unit that can be used to separate the barrels for a supply. It is important that the corresponding barrels with petal-shaped distal openings are separated from each other, otherwise they can easily get caught and cannot be loaded into the receiving fingers in an orderly manner.

[0107] In this example, the tube 100 is transported on a belt 73. Drive rollers 74.1, 74.2 drive the corresponding belts. In the example shown, a transfer is made from one belt system to the other. Rubberized acceleration rollers 75.1, 75.2 driven by belt drives 77.1, 77.2 are provided above this transfer point. Here, the outer tube 100 passes from the drives 70.1, 70.2 with a first speed to the area with the drives 75.1, 75.2 with a second speed. The acceleration separates the interlocked outer tubes. The belts are driven by drive shafts 71, 76 running at different speeds.

[0108] 6 shows an alignment unit which also aligns said barrels 100 for loading the receiving fingers. As mentioned before, the supply of barrels 100 is achieved by two parallel belt drive systems, each with two belts 73.1, 73.2 and 74.3, 74.4. A robot with a robot arm 82 and a gripper 81 grips the barrels 100 and transfers them to a conveyor 80 where the barrels 100 are placed substantially parallel and all facing the same direction. The supply is further terminated in a robot system (not shown) which can, for example, remove a group of barrels from this conveyor unit 80 and load them accordingly into the receiving fingers for loading.

[0109] 7 shows how the joining station 12 with receiving fingers is currently in operative connection with the processing station. The joining station 12 comprises an outer cylinder 101 on a sleeve 12.2 on the first diameter 33. A first inner cylinder 102 is inserted into the outer cylinder 101 and a second inner cylinder 103 is also inserted into the outer cylinder 101.

[0110] The barrel 101 is held in place by a resilient clamping mandrel formed as a bracket having a first bracket portion 35 and a second bracket portion 34 .

[0111] The processing station includes a push knob 50 formed concentrically with respect to the longitudinal axis of the receiving finger, which pushes into the proximal end of the second inner tube and expands the second inner tube with a conical shape creating a trumpet-shaped overall proximal end of the second inner tube 103.

[0112] This reshaping prevents the second inner tube 103 from falling out of the three-part tampon applicator, for example through the mouth of the outer tube 101. This step can complete the joint according to the invention. However, this joining can also be performed over several individual sub-steps. For example, the first forming can be performed with a specific first contact pressure and the second forming with a specific second contact pressure. For each forming operation, a separate processing station with a respective pressure knob can be provided. This gradual reshaping can be repeated as many times as necessary to obtain the desired trumpet-shaped expansion of the proximal end of the tampon applicator. The device according to the invention can be used to join tampon applicators from several hollow tubes in a space-saving and efficient manner with a high throughput. The device according to the invention is particularly suitable for joining three-part tampon applicators with a telescopic plunger that is extended and locked in place.

Claims

1. 1. An apparatus for joining a multi-part tampon applicator, said multi-part tampon applicator comprising an outer barrel (101) and a first inner barrel (102), said apparatus comprising: a. at least one joining station (12) having at least one receiving finger (13.1, 13.2) for receiving one outer cylinder (101) and one first inner cylinder (102), respectively; b. a first liner supply for loading at least one first liner (102) onto said at least one receiving finger; c. a barrel supply for loading at least one barrel (101) onto said at least one receiving finger (13.1, 13.2); d. a first processing station (16) for joining said at least one outer cylinder (101) to said at least one first inner cylinder (102); In an apparatus comprising: The at least one joining station (12) is radially arranged on a circular disk (11). An apparatus comprising:

2. the multi-part tampon applicator includes a second inner barrel, the device comprising: a second barrel supply for loading at least one second barrel into said at least one receiving finger; Further equipped with the first processing station is adapted to join the at least one first inner cylinder to the at least one second inner cylinder; 2. The apparatus of claim 1.

3. The apparatus of claim 1 or 2, wherein the at least one receiving finger has multiple diameters.

4. The device of claim 3 , wherein each diameter is configured to receive a respective outer barrel, a first inner barrel, and a second inner barrel.

5. Apparatus according to any one of the preceding claims, wherein the at least one receiving finger comprises at least one clamping mandrel for holding the outer tube and / or the first inner tube.

6. the first processing station is designed to reshape the outer cylinder, the first inner cylinder, and / or the second inner cylinder received in the receiving fingers, or the second processing station is designed to reshape the outer cylinder, the first inner cylinder, and / or the second inner cylinder received in the receiving fingers, or The apparatus according to any one of claims 1 to 5, wherein the first processing station and the second processing station are designed to reshape the outer cylinder, the first inner cylinder, and / or the second inner cylinder received in the receiving fingers.

7. An apparatus according to any one of the preceding claims, wherein the apparatus comprises a plurality of bonding stations.

8. An apparatus according to any one of the preceding claims, wherein each joining station comprises a plurality of receiving fingers for receiving the outer cylinder and the first inner cylinder, respectively.

9. The apparatus according to any one of the preceding claims, wherein the barrel supply comprises a separation unit.

10. 10. The apparatus according to any one of claims 1 to 9, wherein the circular disk is rotatable such that the joining station can be brought into operable connection with a radially arranged inner cylinder supply, an outer cylinder supply, a first processing station and a second processing station, respectively.

11. 1. A method for joining a multi-part tampon applicator, comprising: a. aligning a bonding station with a first inner cylinder supply; b. loading a first inner cylinder into a first receiving finger of said joining station; c. aligning the bonding station with an outer cylinder supply or a second inner cylinder supply; d. loading an outer cylinder or a second inner cylinder into the receiving finger of the joining station; In a method comprising: The alignment of the joining stations (12) arranged radially on a circular disk (11) is effected by a circular rotation of the circular disk. A method comprising:

12. a. aligning the bonding station with a forming station for forming the first inner barrel and / or the second inner barrel by applying heat and pressure; The method of claim 11 further comprising:

13. 13. The method according to claim 11 or 12, wherein when the bonding station is loaded, the inner barrel having the smallest diameter of the multi-part tampon applicator is loaded first onto the first receiving finger.

14. A method according to any one of claims 11 to 13, wherein the outer sleeve is clamped onto the receiving fingers by a clamping mandrel which exerts a restoring force.

15. A method according to any one of claims 11 to 13, wherein the outer cylinder is ejected by a clamping mandrel exerting a restoring force on the receiving fingers.

16. The method of claim 13, wherein when the joining station is loaded, the inner barrel having the smallest diameter of the multi-part tampon applicator is first loaded onto the first receiving finger at a tip region having the smallest diameter of the receiving finger.

17. The method described in claim 11, wherein the alignment of the joining stations (12) radially arranged on a circular disk (11) is brought about by circular rotation of the circular disk so that the receiving fingers are operably connected coaxially to the inner tube supply portion and / or the outer tube supply portion.

18. The apparatus of claim 3, wherein at least one of the receiving fingers has a diameter portion that tapers radially.

19. An apparatus as described in claim 1, wherein the at least one joining station (12) is radially arranged on the circular disk (11) so that the at least one receiving finger (13.1, 13.2) is radially oriented.

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