APPARATUS AND METHOD FOR EQUIPPING TAMPON APPLICATORS WITH TAMPONS

Abstract

An apparatus for equipping tampon applicators with tampons includes an encircling guide arrangement with an entry point, at which the tampon applicators are fed into the apparatus. The apparatus furthermore includes an exit point, at which equipped tampon applicators are discharged. The apparatus furthermore includes an equipping unit arranged between the entry point and the exit point and designed for equipping tampon applicators with tampons. A multiplicity of guide units which are guided on the guide arrangement serves for transporting the tampon applicators on the guide arrangement. A guide unit conveys tampon applicators on such apparatus, and a method equips tampon applicators with tampons.

Claims

1. A guide unit for transporting tampon applicators on an encircling guide arrangement, in particular on an encircling guide arrangement of an apparatus for equipping tampon applicators with tampons, comprising a. an applicator receptacle for receiving a tampon applicator, wherein the applicator receptacle comprises means for holding the tampon applicator in the applicator receptacle in positive-fitting and/or force-fitting fashion; b. a guide element with engagement means for the supported displacement of the guide unit on the encircling guide arrangement; c. at least one driving projection for operative connection of the guide unit to a drive and/or an equipping unit.

2. The guide unit according to claim 1, wherein the applicator receptacle is mounted displaceably, and in particular is mounted so as to be displaceable in a radial direction of the encircling guide arrangement, with respect to the guide element.

3. A holding cassette for receiving a tampon applicator, comprising an applicator receptacle which comprises means for holding the tampon applicator in the applicator receptacle in positive-fitting and/or force-fitting fashion.

4. The holding cassette according to claim 3, comprising at least one, in particular one to four, holding bulges which extend into a recess of the applicator receptacle such that they are capable of forming a positive-fitting and/or force-fitting connection with inserted tampon applicator.

5. The holding cassette according to claim 3 for receiving a tampon applicator, wherein the applicator receptacle comprises one to four holding bulges.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Other objects and features of the invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.

[0085] In the drawings,

[0086] FIG. 1 schematically shows an embodiment of the apparatus according to the invention;

[0087] FIG. 2 schematically shows, in longitudinal cross section, an equipped tampon applicator;

[0088] FIG. 3A schematically shows an equipped guide unit;

[0089] FIG. 3B schematically shows a guide unit in a frontal view;

[0090] FIG. 4 schematically shows a driver for a batch of guide units;

[0091] FIG. 5A schematically shows an equipping unit and its associated processing space of a guide arrangement;

[0092] FIG. 5B schematically shows an operative connection between a guide unit and the equipping unit;

[0093] FIG. 6A schematically shows a refinement of a holding cassette; and

[0094] FIG. 6B shows a further schematic refinement of a holding cassette.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0095] FIG. 1 schematically shows an apparatus 1 for equipping tampon applicators with tampons in one possible realization of the present invention. The apparatus for equipping tampon applicators is organized around an encircling guide arrangement 2.

[0096] In this example, the guide arrangement 2 is arranged as an elongate rectangle, to narrow sides of which have been replaced by semicircles. The guide arrangement 2 comprises a rail (schematically shown), supported on which a series of guide units 10 can move. In the present example, a total of four guide units 10 are shown for an exemplary illustration.

[0097] In one realization of the present invention, it is possible for between four and 4000, in particular between eight and 2000, furthermore in particular between 24 and 400 guide units 10 to be used on one guide arrangement 2 as shown in FIG. 1. The number of guide units 10 may be adapted to the processing rate or the feed of tampon applicators. The guide units 10 serve for transporting individual tampon applicators along the circumference of the guide arrangement 2. Arranged on said circumference of the guide arrangement 2 are various processing stations which can perform a working step on the tampon applicators.

[0098] The tampon applicators are introduced at an entry point 3 into an applicator receptacle 22 of a guide unit 10. For this purpose, it is for example possible for a batch of provided tampon applicators to be transferred by means of a plunger into a corresponding number of guide units 10 (not shown). The apparatus 1 discussed in this example has a conveying direction F in which the guide units 10 can be moved into the individual processing stations by means of drive elements 9 or other drive elements which are not shown. For this purpose, the guide units 10 have rollers 20.1, 20.2, 21 which are mounted on the rail of the guide arrangement 2. The guide unit 10 that is shown by way of example close to the entry point 3 has a first roller 20.1 and a second roller 20.2, which are mounted on the outer circumference of the guide arrangement 2, and a counterpart roller 21, which is mounted in the inner circumference of the guide arrangement 2. For this purpose, the guide arrangement 2 may have a rail which is designed as a T-shaped profile and into which the rollers 20.1, 20.2, 21 can engage. The guide arrangement may furthermore, over its circumference, describe variable radii for the outer radius and the inner radius; for example, parallel sections on the straight parts may transition into variable radii at the curves in order to permit improved rolling of the guide units over the curves.

[0099] The rollers are arranged in rotatably mounted fashion on a guide element 19. In the present example, said guide element 19 is rigid with respect to the guide arrangement 2. Alternatively, the guide element 19 may be mounted movably with respect to the guide arrangement 2 by means of spring-loaded rollers 20.1, 20.2, 21. Spring-loaded rollers would, by means of a resetting force, be movable in a substantially normal direction with respect to the guide arrangement 2. In the present context, a normal direction is to be understood to mean a direction perpendicular to the tangent of the guide arrangement. In the present, rigid example, the guide element 19 is connected to a spring-loaded holding cassette 18 which comprises the applicator receptacle 22. A resetting spring 23 between the holding cassette 18 and the guide element 19 ensures that the holding cassette 18 is mounted movably with respect to a tangent to the guide arrangement 2. In the present example, a total of nine drive elements 9 is shown. The number of drive elements may however be adapted to the geometry of the guide arrangement 2 as required. In the present example, all drive elements are furthermore driven by means of a head drive of a drive roller. The drive elements 9 may also be driven collectively, by being connected for example using drive belts via a shaft. Thus, a single drive motor would suffice to drive a number of drive elements 9 required for implementing the present invention. The drive elements 9 engage the guide units 10 via drivers (not shown in FIG. 1) and move them in the conveying direction F.

[0100] At the first narrow side situated downstream in the conveying direction F, the processing region of the equipping unit 5 begins. The equipping unit 5 is only partially shown in FIG. 1 and, overall, is of rotationally symmetrical and drum-shaped form, such that it has radially arranged tampon receptacles 13. If a guide unit 10 passes into the processing space of the equipping unit 5, an equipping driver 12 of the equipping unit 5 causes the guide unit 10 to be driven along and guided over an alignment radius 11, at which the applicator receptacle 22 of the guide unit 10 is aligned substantially concentrically with the tampon receptacle 13 and the equipping can take place. In the presence of the concentric arrangement, a limit stop region 14 of the equipping unit 5 serves to compress the resetting spring 23 which displaces the holding set 18 in the direction of the guide element 19. The alignment is completed by means of the resetting force of the resetting spring 23. As the guide units 10 are driven along, the equipping drivers 12 operatively connect to a driving projection, formed as a pin on the guide element 24.

[0101] In order to optimally control the driving of the guide units 10 on the equipping unit 5, the apparatus 1 additionally has a separating unit 15 with a displaceable stopper 16 which can adapt the guide units 10 to the frequency of the equipping unit 5.

[0102] Positioned downstream of the equipping unit 5 is a series of processing units 6, 7, 8. By means of drive elements 9, a guide element 10 passes into the processing units 6, 7, 8. This may be performed continuously, or by means of batches of guide units 10, which are collected and transferred by means of a drive into the individual processing units 6, 7, 8. In the present example, the first processing unit is a heating element, in the case of which the tampon applicators are warmed to a temperature of approximately 100 degrees C. and thus become moldable, which makes it possible for the downstream second processing unit, the shaping element, to deform the distal end of the tampon applicator such that it closes in the manner of a bud around the tampon. The following processing unit is a cooling element 8, which cools the tampon applicator back to a processing temperature of approximately 20 C. and in the process fixes the shaping.

[0103] At an exit point 4, the fully equipped tampon applicators are discharged out of the apparatus 1 and are fed for possible further processing for manufacturing or packaging purposes.

[0104] In the embodiment shown by way of example, a buffer region 29 may be positioned downstream of the equipping unit 5. Said buffer region 29 may be of passive design, that is to say it may be a region in which the guide units passively collect, or buffering may be performed actively, for example by virtue of one or more stoppers accumulating a certain number of guide units. When a defined number of guide units has collected in the buffer region 29, these can be conveyed onward in batches or in continuous fashion, for example by means of a driver. This may be performed in batches or by means of individual drivers for the conveying units. In the present example, a buffer region 29 is provided which is positioned downstream of the equipping unit 5 but upstream of the first processing unit 6 of the series of processing units 6, 7, 8, such that, at said buffer region, a number of guide units can be collected and transferred in batches to the processing unit.

[0105] FIG. 2 shows an example of an equipped tampon applicator. Here, the equipped tampon applicator 42 is illustrated in original cross section with an inserted tampon 41. The equipped tampon applicator 42 has a distal end 46, which forms the applicator head, and a proximal end 47, which has an opening for a withdrawal thread 44. Said withdrawal thread 44 extends to the inserted tampon 41, which is arranged in a substantially accurately fitting manner in the tampon body 40. Toward the proximal end of the tampon body 40, the tampon applicator tapers into a grip region 48 which is formed integrally with the tampon body 40 and which may selectively also have a rubber lining or roughening or other surface conditioning which facilitates handling. Situated at the distal end 46 is the head opening 45 with a multiplicity of projections formed in the manner of flower petals. In the present example, the equipped tampon applicator 42 is illustrated still in its open form, that is to say prior to the deformation by means of a shaping element 7. During the deformation, the proximal end and the head opening 45 are closed by virtue of the projections being bent inwardly towards the central longitudinal axis of the tampon applicator.

[0106] The tampon applicator shown here is to be regarded merely as an example of a tampon applicator suitable for the apparatus according to the invention. Other geometries relating to the head openings, such as a simple cross section, an open head opening (requires no deformation elements) or a head part incised in spiral fashion would likewise be conceivable. It is also possible for multi-part tampon applicators to be provided, in which the head end does not need to be molded but rather, as a separate cap, is mounted, and for example engaged with latching action, onto the tampon body in a further processing step. Alternative embodiments which involve non-thermoplastic materials, such as for example cardboards or thermosets, may comprise different shaping operations or closure steps in order to close the tampon head.

[0107] FIG. 3A schematically shows the construction of a guide unit 10 according to the invention. In the present example, the guide unit 10 is shown with a received tampon applicator. The tampon applicator is held on the tampon body 40 by three holding bulges 17.1, 17.2, formed on a holding cassette 18, by means of a positive-fitting and/or force-fitting connection. The holding bulges 17.1, 17.2 extend in straight fashion and into an applicator receptacle of the holding cassette 18 such that the inserted tampon applicator is, at its tampon body 40, compressed to just such an extent that it is securely held without sustaining material damage. The tampon applicator is inserted into the applicator receptacle such that its proximal end with the plunger 43 points toward a front side, and the head end 45 points toward a rear side.

[0108] The plunger 43 is not formed as a single piece with the tampon body 40, and is displaceable in a longitudinal direction of the tampon applicator. During the insertion of the tampon and the tampon applicator and the equipping thereof, the plunger 43 is pushed out of the tampon body and assumes the configuration shown in FIG. 2.

[0109] The holding cassette 18 is formed as a separate component of the guide unit 10 and is connected by means of latching lugs 25 to a guide element 19. On the guide element 19 there are formed a total of three rollers 20.1, 20.2 and 21. During operation, the rollers 20.1, 20.2, 21 engage into a T-shaped profile of a rail of a guide arrangement, such that the first roller 20.1 and the second roller 20.2 roll on one side, in particular on the outer radius of the guide arrangement, and the counterpart roller 21 rolls on the inner radius of the guide arrangement.

[0110] The holding cassette 18 may be mounted so as to be movable with respect to the guide element. For this purpose, the latching lugs 25 are formed such that, below the latching lugs 25, there is a free movement space through which the holding cassette 18 can be displaced with respect to the guide element 19. No spring or similar resetting element is illustrated in this illustration, though may likewise be realized as discussed in the introduction. In the present apparatus, the holding cassette 18 can be easily exchanged. Since the holding cassette 18 can be subject to increased wear as a result of the contact of the tampon applicators, and economic and ecological improvement is furthermore achieved with the present guide unit 10.

[0111] FIG. 3B shows the guide unit 10 in a plan view. The guide unit 10 is broadly divided into two functional components, the holding cassette 18 and the guide element 19. In the present example, the guide element 19 is equipped with three rollers 20.1, 20.2 and 21, which in the present example are composed of steel and can engage into a corresponding T-shaped profile of a guide arrangement. By means of the three-roller system, the guide element 19 can follow a curved profile of the guide arrangement without spring loading of the rollers 20.1, 20.2 and 21 being necessary. Spring loading may nevertheless self-evidently be implemented. The holding cassette 18 has an applicator receptacle 22, which is illustrated as a cavity and which extends through the entire thickness of the holding cassette 18 and which is oriented so as to receive a tampon applicator as shown in FIG. 3a. The applicator receptacle has a circular cross section which is indented by three holding bulges 17.1, 17.2, 17.3. It has surprisingly been found that the contact by means of these three holding bulges alone permits optimum hold of the tampon applicator in the guide unit, which is particularly gentle to the applicator material. The holding cassette 18 may be formed as a single piece. Between the holding cassette 18 and the guide element 19, a resetting spring 23 provides a resetting force which compensates a movement of the holding cassette 18 in the frontal plane.

[0112] FIG. 4 illustrates a further aspect of the present invention. The guide units 10 can be individually moved in each case by means of a driver by the drive units in the conveying direction. Alternatively or in addition, a batch of guide units can, by means of a driver 28, be configured with a notched profile which can operatively connect to a pin 27 of in each case one guide unit and in so doing permit an alignment of the guide units and conveyance thereof. In the present illustration, the guide units are, by contrast to FIGS. 3a, 3b, shown from the rear side thereof, but it is likewise possible to see the holding cassette 18 with the three holding bulges 17.1, 17.2 and 17.3. Shown on the opposite side of the pin 27 which is formed on the guide element 19 is the guide arrangement 2, into which the rollers (not shown in this illustration) can engage. This type of driver 28 is suitable for example in processing regions, for example at an entry point, exit point, heating element, shaping element and/or cooling element. In addition to the transport of the guide units, a driver 28 designed in this way can ensure an alignment of the guide units with respect to a processing element.

[0113] FIG. 5A illustrates an embodiment of the processing region of an equipping unit 5. As discussed in the introduction, the equipping unit 5 is formed in the manner of a drum and has radially arranged equipping drivers 12 which, as soon as a guide unit 10 passes into the region of activity as a result of being conveyed in the conveying direction F of the equipping unit 5, can operatively connect to a driving projection 24 and transfer the guide units 10 into the processing radius F1 of the equipping unit 5. During the course of this transport over the processing radius F1, preferably at a time at which the tampon applicator is aligned concentrically with respect to a tampon receptacle of the equipping unit 5, the equipping of the tampon applicator takes place. In the present example, it is also shown how a multiplicity of guide elements can ensure continuous processing and equipping.

[0114] FIG. 5B shows a rear view of the equipping radius F1 with a guide unit 10 which has already been engaged by an equipping driver 12. At this point, the guide arrangement 2 describes a radius which substantially follows the circumference of the equipping unit 5. The guide arrangement 2 has a rail into which the rollers 20.2, 21 on the guide element 19 engage. Situated on the rear side of the guide element 19, averted from the rollers, is a pin 27 which is suitable for example for driving the guide unit 10 along by means of the drive elements (not shown in this example) or by means of batch transport by means of the driver (as discussed above). The holding cassette 18 has an applicator receptacle 22 which, by means of three holding bulges 17.1, 17.2, 17.3, hold a tampon applicator. An applicator receptacle aperture 30 is aligned with a tampon guide 31 in this processing space, which, in the case of a concentric arrangement of the longitudinal axes, permits a transfer of the tampon to the tampon applicator. In the present example, the tampon applicator would point with its distal end forward into the plane of the viewer and would be fitted by the equipping unit 5 via the applicator receptacle aperture 30 and the tampon guide 31.

[0115] FIGS. 6A and 6B show alternative embodiments for the holding cassette 18. FIG. 6A shows a holding cassette 18 in the case of which a recess 22 is delimited by four holding bulges 17.1, 17.2, 17.3 and 17.4. Here, the holding bulges are oriented so as to be arranged substantially symmetrically. This arrangement also enables a tampon applicator to be held in a gentle manner that simultaneously permits reliable processing.

[0116] FIG. 6B shows a further alternative embodiment of a holding cassette 18. The holding cassette 18 likewise has an applicator receptacle 22, which in this case is delimited by two holding bulges 17.1, 17.2, which are arranged mirror-symmetrically with respect to one another.

[0117] From the exemplary embodiments shown and from the general disclosure, a person skilled in the art will gather further advantageous combinations which are not described in detail here.

[0118] With the apparatus according to the invention, the guide unit and the corresponding method, provision is made of a method of said type which is very easy to implement and at the same time permits very high processing rates. Additional advantages are the ease of maintenance and the modularity, which can arrange individual components differently than in the specific example shown here.

LIST OF REFERENCE DESIGNATIONS

[0119] 1 Apparatus [0120] 2 Guide arrangement [0121] 3 Entry point [0122] 4 Exit point [0123] 5 Equipping unit [0124] 6 Heating element [0125] 7 Shaping element [0126] 8 Cooling element [0127] 9 Drive element [0128] 10 Guide unit [0129] 11 Alignment radius [0130] 12 Equipping driver [0131] 13 Tampon receptacle [0132] 14 Limit stop region [0133] 15 Separating unit [0134] 16 Stopper [0135] 17.1 1st holding bulge [0136] 17.2 2nd holding bulge [0137] 17.3 3rd holding bulge [0138] 18 Holding cassette [0139] 19 Guide element [0140] 20.1 First roller [0141] 20.2 Second roller [0142] 21 Counterpart roller [0143] 22 Applicator receptacle [0144] 23 Resetting spring [0145] 24 Driving projection [0146] 25 Latching lugs [0147] 26 Resetting region [0148] 27 Pin [0149] 28 Driver [0150] 29 Buffer region [0151] 30 Applicator receptacle aperture [0152] 31 Tampon guide [0153] 40 Tampon body [0154] 41 Tampon [0155] 42 Equipped tampon applicator [0156] 43 Plunger [0157] 44 Withdrawal thread [0158] 45 Head opening [0159] 46 Distal end [0160] 47 Proximal end [0161] 48 Grip region [0162] F Conveying direction [0163] F1 Adapted radius [0164] R Direction of rotation