EP0313719B1 - Device for transferring a film from a carrier foil onto a substratum - Google Patents

Abstract

The device, suitable for use in a hand roller, for transferring a film from a carrier tape to a substrate is a cartridge containing a feed reel and a windup reel. The tape travels by way of a protruding stiff applicator bar which has a pressure-applying edge for pressing the tape against the substrate. The stiff applicator bar is on a spring support member which can be deflected until a protrusion on the bar encounters a detent fixed on the housing. The application bar has its pressure-applying edge appropriately shaped to facilitate the transfer action.

Description

The invention relates to an arrangement for transferring a film from a carrier film to a substrate, with a housing or frame in which a supply spool and a take-up spool for the carrier film are accommodated, the carrier film via an application element protruding from the housing or frame to press their film soap against the substrate and from this back into the housing or frame on the take-up spool and the application element can be deflected under pressure in the direction of the housing or frame up to a stop.

Arrangements for applying a film from a carrier film to a substrate are preferred in the office area, for example for transferring an adhesive film from a carrier film to e.g. Paper, for gluing another paper locally or for gluing a sheet with other sheets or the like, is used, this usually being done in conjunction with hand rollers. As a result, the user can achieve a very clean, rapid and also precisely placed application of a plastic layer. Such hand rollers are quickly stowed away when not in use and can be used immediately in use, without problems with undesired drying of an adhesive liquid or the like. exist.

In a known such device on the market of the type mentioned at the beginning in the form of a "hand roller", which is described in EP-A-0 263 926, however, which was only published after the priority date, the take-up spool (dispenser spool) for the carrier film and the supply spool is attached to the hand roller housing. A solid, projecting from one end of the housing in the housing serves as the application element pivotable lever under the action of a spring in a starting position pushed away from the housing, which carries at its end protruding from the housing a very large, integrally formed cylindrical cross bolt with a plastic sleeve which can be rotated relative to it and via which the from the supply spool incoming carrier film is guided and then deflected upwards again for winding onto the take-up spool in the housing. In this known device, the take-up reel is driven from the supply reel via a gear transmission with a slip clutch. The lever-shaped projecting element from the housing extends within the housing beyond its lever pivot point to the other side and engages there via a corresponding locking member in the teeth of a gear wheel attached to the supply spool, so that the supply spool is twisted in the Starting position (rest position) of the hand roller is not possible. The very large cross bolt at the end of the application element protrudes laterally so much through its lever that if it is pressed against the preload spring, it can spring out in the direction of the housing (upwards) until the protruding part of the Cross pin hits the housing.

However, this known device has the disadvantage that the application radius at the end of the application element is very large, which results in a poorly defined tear line of the film to be dispensed on the substrate (for example a paper sheet) in practical use and also when using the device from the person handling it, it is only possible to determine inaccurately to what point the adhesive film to be transferred is actually already transferred to the substrate. Furthermore, the pivotable mounting of the entire holding lever for the application element and its simultaneous use as a locking arm for the supply reel also has the disadvantage that only from a relatively large, due to the Eintriegelungsweg on the supply reel a release of the supply reel takes place, after which can be applied, but this can lead to difficulties in handling with awkward people. If such a roller is held even slightly tilted, even a slight tilt can not be compensated by the user and the desired film application to the substrate not at all or not be executed properly.

Proceeding from this, the object of the invention is to improve the arrangement mentioned at the outset in such a way that, in the case of handling which is unproblematic even for awkward persons, and with a simplified construction and cheaper manufacture, a tear line of the film transferred to the substrate, which is clearly better defined in use, can be achieved.

According to the invention, this is achieved with an arrangement of the generic type in that the application element is designed in the form of an elongated, elastically resilient support foot which is inclined from a base fixed non-rotatably on the housing or frame and which is provided at its free end with a rigid application bar is, which on its side facing the carrier film for pressing the carrier film against the substrate has a rounded pressure edge with a radius of not greater than 1.5 mm and at a distance from this an upper stop area with which it is used to limit the spring travel over a Counter stop on the housing or frame is supported.

In the invention, unlike the generic device, no large and rigid, but rather a small and graceful executable application element is used, which executes the rebound movement under pressure due to its own elasticity and accordingly neither a special biasing spring within the housing for returning to its initial position (after use), still a rotatable, but only a fixed fixation (clamping) within the housing. The rigid application bar attached to the end of the support leg in the invention forms a part which, in contrast to the support foot, is no longer resilient but rather rigid, which is much smaller and less material-consuming than the cylinder bolt in the known device and also offers the possibility of using one its edges as a rounded pressure edge with a radius of no greater than 1.5 mm to press the carrier film with film against the substrate to create a much smaller deflection radius, which is a very precisely defined and easily detectable position of the tear-off edge of the applied film results. Because the limit stop For the rebound path on the application bar, which is only required at the end of the support leg and can therefore be made small, is also the distance from the stop area to the pressure edge and thus the lever arm, via which the contact pressure applied by the user via the application element to the Pressure edge is forwarded, particularly low. The result of this is that even very large contact forces can be transmitted by the user to the pressure edge, since the stresses occurring in the effective cross-section of the transmission element for transmission are much smaller than in the generic device because of the short lever arm. This results in the possibility of being able to use the arrangement according to the invention for areas of use other than those known in the generic device, namely, for example, for those areas of application in which it is important to apply large application pressures and small application radii. Thus, the arrangement according to the invention can also be used, for example, for carrier foils, on which, for example, a correction cover film (cover film) to be transferred onto a paper can be attached, in order to use it to correct, for example, the characters of a typewriter or a printer on a paper for correction purposes cover, which is particularly important here because of the type of typewriter or the like. When depressions are created on the paper, increased pressures along the relevant letter when applying a covering layer (cover layer) so that a sufficient introduction of the covering layer into this recess is really ensured. The generic device cannot be used at all for such an intended use, since the large radius of the cylinder bolt attached to the end of the application element and the otherwise selected overall arrangement make it possible to achieve particularly large local contact pressures at the location where the film is locally from the carrier film is pressed onto the substrate, is not possible. The arrangement according to the invention thus allows very little to be able to train the entire application element, and its suspension around a pivot point fixed to the housing and additionally the attachment of a pretensioning spring can also be dispensed with, so that, finally, with the drive gear and a slip clutch between the supply and also required Overall, the drive coil is not only simplified, but also significantly less expensive Overall structure results, which ultimately also allows the overall device to be made smaller and more delicate than before.

In order to achieve the rigidity of the applicator element provided in the invention where rigidity and rigidity are required, namely in the end region of the applicator element, but otherwise to be able to form it in a delicate and resilient manner, the applicator bar is very particularly preferably substantially shorter and essential in cross section formed thicker than the support leg, its length is preferably only a quarter to a third of the length of the support leg and its thickness preferably corresponds to at least 1.25 times the thickness of the support foot. In this way, excellent functionality can be achieved with a virtually optimized total material expenditure.

The application bar and the support leg can of course consist of the same material and be made in one piece. However, the application bar and support leg are particularly preferably made of different materials, so that each of these two elements can also be optimized in terms of its function, also in terms of the material.

A further preferred embodiment of the invention also consists in the fact that the application bar can be exchanged, which results in the possibility that the user can also change different application bars themselves for different materials or different purposes. It should be noted that the forceful load on the applicator bar placed on the support foot is aimed exactly in the direction of attachment and, moreover, the band of the carrier film, which usually wraps around the applicator bar, prevents undesirable sliding of the bar, especially if it protects it even a little against unintentional sliding off is, makes impossible. However, the application bar is very particularly preferably placed on the support foot with frictional engagement, so that an undesired sliding down does not have to be expected even if the carrier tape is omitted.

Different shapes can be used to round off the pressure edge of the application bar, depending on the requirements of the transfer Fabric film, such as a small radius to achieve high specific surface pressures in the application area. For this purpose, the pressure edge of the application bar is preferably provided with a curvature that is circular in cross section. Another, also very advantageous embodiment of the curvature of the pressure edge also consists in the fact that this has a radius of curvature (seen in the direction of displacement of the carrier film) which reduces, so that with increasing tarnishing of the carrier film against the application bar, an ever greater curvature occurs, here entirely the smallest radius of curvature used is particularly preferably not greater than 1.5 mm. It is precisely with this variation of the contact surface for the carrier film that the possibility for a better grasping of the film beginning created during the last use (the so-called "ironing") is offered. This can be particularly favored by the fact that on the end of the applicator bar facing the carrier film next to the pressure edge there is a heel edge which is arranged parallel to the pressure edge and is separated from it by a recess, also protruding and also rounded and has a much smaller radius of curvature than the pressure edge , wherein the common tangent of the pressure edge and heel to the longitudinal axis of the application element forms an angle of at least 35 ° and at most 45 °, but very particularly preferably of 40 °. This arrangement provides a particularly favorable option for "ironing" the film tear-off edge onto the substrate if the tear-off should not have taken place directly below the edge, in which case the user, if he ascertains when the hand roller, for example, is pressed and moved for the first time, that no substrate is transferred, only by a small reduction in the angle adjustment over the heel bar creates a second pressure point, seen in the direction of transport of the carrier film, behind the pressure edge, but at which the film to be transferred is present with certainty, whereby "ironing" is guaranteed can be.

Furthermore, in the arrangement according to the invention, the stop area on the application bar is preferably provided as a bump-like projection in the center of the application bar, with it being particularly preferably formed in one piece with it. It has proven to be particularly favorable if the stop area is attached in the region of the upper end of the application bar facing away from the carrier film, in particular if the longitudinal extension the overall job bar is only relatively small.

It is also advantageous if the protrusion has a cross section transverse and perpendicular to the longitudinal direction of the application element with upwardly converging side surfaces and a rounded tip, with, very particularly preferably, also an inclined upward slope on its front side facing the pressure edge of the application bar Front surface is provided. This creates the possibility that the upper stop area, where it will come to rest with the counter-stop, is rounded or spherical and with a small width, so that even with a slight tilting of the device by the user due to the elastic Resilience of the support foot can already be compensated for by this, a problem-free transfer of the applied pressure force in connection with an impeccable contact of the pressure edge against the substrate can also be achieved. For this purpose, the projection is very particularly preferably curved on its upper side facing the counterstop in the shape of a section of a cylinder or a section of a sphere.

A very special preferred embodiment of the arrangement according to the invention also consists in forming on the counterstop a counterstop surface appropriately shaped for the abutment of the projection, which leads to particularly favorable results if the surface provided for abutment against the counterstop is not flat, but, as e.g. already mentioned, cylindrical section, spherical section or the like. This creates an optimal possibility of supporting the surfaces against one another because of the maximization of the possible support surface (and thus a minimization of the impact pressures that have to be transmitted).

In the arrangement according to the invention, the support foot can be designed in any suitable manner, which ensures that the desired deflection of the support foot can take place with simultaneous correct alignment of the application bar relative to the substrate. A very particularly preferred embodiment of the support foot, however, is to design it in the form of a toggle lever which is bent out to the side is on which the section of the carrier film running between the supply spool and the applicator bar is located, and being, additionally preferably, seen in a plane perpendicular to the pressure edge, which also runs through the foot point of the support foot, in each case from the pressure edge, the foot point of the support foot and the axis of rotation of the supply spool lies on a straight line in this plane, which has the advantage that when the spool is placed the line of action lies on this straight line and a good, independent restoring effect occurs when the pressure is released.

The support foot, the application bar and the stop area and the counterstop are very particularly preferably made of plastic. However, the choice of material can also be made differently depending on the conditions of use. For certain applications, it can also be advantageous to design the support leg from a resilient metal strip, to which, likewise preferably, a corresponding application strip made of plastic can be attached below. This is advantageous if greater pressure forces are to be transmitted (for example in the case of cover films) or if for other reasons a greater load on the support foot, a particularly long service life of the same or particularly strong elastic restoring forces are to be achieved with even small deflections.

The arrangement according to the invention is suitable, as has already been referred to, for example for use with hand scooters of the type already mentioned. Another, particularly preferred embodiment of the arrangement according to the invention also consists in the fact that it is not installed directly in a hand roller, but rather it Support frame, which holds the application element and receives the supply reel and the take-up reel, is designed as an exchangeable cassette, which in turn can be inserted into the housing of a hand-held device. This configuration has the great advantage that the spool change in the handheld device can then be carried out extremely quickly and requires no insertion of the supply and take-up spool or threading of the tape run, since only the used cassette is removed from the device and a new cassette is inserted. In this case, a corresponding opening must also be provided in the hand-held device only at the point at which the application element protrudes from the cassette through which the application element in protrudes from the hand roller in the same way, so that it is immediately ready for use after inserting the new cassette and closing its housing. The drive gear between the supply and take-up spools and the slipping clutch still to be provided are provided within the housing of the hand roller, for example (and not in the exchangeable cassette), so that when the exchangeable cassette is inserted, only a corresponding coupling of the coils contained in the cassette via appropriate openings the pivot pin provided in the housing in connection with the gearbox must be done, such as is also the case when inserting exchangeable cartridges for ribbons in typewriters.

• Fig. 1 eine erfindungsgemäße Anordnung in Form einer einsatzbereiten Wechselkassette;
• Fig 2. die Kassette aus Fig. 1, jedoch in geöffnetem Zustand mit einer abgenommenen Seitenabdeckung;
• Fig. 3a bis Fig. 3e eine prinzipielle Darstellung des Aufsetz- und Betriebsvorganges bei einem Andruckelement einer erfindungsgemäßen Anordnung zu Übertragung eines Filmes auf ein Substrat, dargestellt anhand einer Sequenz aufeinanderfolgender Einzelschritte;
• Fig. 4a bis Fig. 4d die Darstellung unterschiedlicher Ausbildungsformen für die Abrundung der Auftragsleiste an deren Auftragskante, sowie
• Fig. 5 eine perspektivische Prinzipdarstellung des vorderen Abschnitts eines erfindungsgemäßen Auftragelementes und des am Gehäuse befestigten Gegenanschlags (start vergrößerte Darstellung),

The invention is explained in more detail below in principle by way of example with reference to the drawing. Show it

• 1 shows an arrangement according to the invention in the form of a ready-to-use exchangeable cassette;
• 2 shows the cassette from FIG. 1, but in the open state with a removed side cover;
• 3a to 3e show a basic illustration of the placement and operating process in the case of a pressure element of an arrangement according to the invention for transferring a film onto a substrate, illustrated by means of a sequence of successive individual steps;
• Fig. 4a to Fig. 4d the representation of different forms of training for the rounding of the application bar on its application edge, and
• 5 is a perspective representation of the principle of the front section of an application element according to the invention and of the counter stop attached to the housing (start enlarged view),

1 and 2, an interchangeable cassette is shown, as z. B. in the housing of a suitably designed (not shown in the figures) hand roller.

The cassette 1 shown has two side covers 21, 2b, the illustration according to FIG. 1 showing only the one side cover 2a of the cassette 1 facing the viewer, while FIG. 2 shows the cassette according to FIG. 1, but with the side cover 2a removed so that only the other side cover 2b is visible here.

As the open representation of the cassette 1 of FIG. 2 shows, is in the Cassette first the supply spool (dispenser spool) 10, on which a carrier film 5 is wound, which in turn is coated on the outside with a suitable film 5a (cf. representations of FIG. 3), which is, for. B. a suitable adhesive film or a cover layer for application z. B. is on paper.

The carrier film 5 coated in this way runs from the supply wound on the supply reel 10 towards the front (in FIGS. 1 and 2: left) end of the cassette 1, at which an application element 4 protruding from the cassette 1 (see FIG 1) is provided. This application element 4 consists of a fixed and non-pivotable in the housing at a base 13, d. H. Support lever 12, which is held clamped and is designed in the form of a toggle lever, its knock-out point 20 being directed towards the carrier film 5 running between take-up reel 10 and application element 4. At the other end, an application bar 14 is attached to the support leg 12 with a pressure edge 14 'located at its free front end, the carrier film 5 coming from the take-up spool 10 being fed back around this pressure edge 14 and into the cassette 1. There it is guided to the take-up spool 11 via a compensating spring 6 in the form of a thin and elastically bendable clamping lever 6, which is also firmly clamped at its base point. The film strand, which runs between the tension spring 6 and the take-up reel 11, lies against the top of the film supply still present on the supply reel 10, which is still provided with an adhesive film on the outside thereof, thereby creating an adhesive effect between the carrier film running to the take-up reel 11 5 occurs without adhesive film and the tape supply on the supply reel 10. This sticking or adhesive effect favors the winding of the carrier film 5, which is guided in the direction of the winding spool 11 and comes from the compensating spring 6, since there is a direction of movement in the same direction, because the supply spool 10 moves in the direction of the arrow w (FIG. 2 ) turns.

On the application bar 14 at the end of the support leg 5 is attached to the pressure edge 14 'opposite end, a stop area in the form of a projection 7, in the direction of the rebound movement protrudes. This stop area 7 is assigned a counter-stop 8 which is fixed to the frame and which is provided in one piece on a connecting web 15 attached to the side plate 2b for connecting the two side plates 2a and 2b of the cassette 1 to one another. Further such connecting webs 15 also protrude from the side plate 2b at some other locations, as can be seen from FIG. 2. You correspondingly are provided on the other side plate 2a small projecting plug-in bolts (not shown in the figure), which are inserted into a central opening in each connecting web 15 to form the overall frame and z. B. can be locked or otherwise attached.

For a better representation of the mutual assignment of the stop area 7 and the counter-stop 8 on the cassette, the free space between the two stops, which represents the maximum possible rebound travel, is not shown to scale and considerably too large in FIGS. 1 and 2, which, however, clarifies the Presentation favors. In a practically designed cassette, it is such that the maximum rebound travel at the pressure edge 14 'is approximately 1 mm and accordingly the free gap f (FIG. 3a) between the stop region 7 and the counterstop 8 is smaller in accordance with the lever ratios (e.g. .0.6 or 0.7 mm).

As can be seen from the illustration in FIG. 2, a spring lip 16 is also provided in the side plate 2b and engages to form a backstop in a toothed ring (not shown in FIG. 2) which engages on the end face facing the side plate 2b the take-up spool 11 is provided.

As shown in FIGS. 1 and 2, there is an end toothing 9 on the end face of the take-up spool 11 opposite this toothed ring and facing the side plate 2a, which after the cassette is closed (see FIG. 1) through a corresponding opening in the associated side plate 2a Extends through the outside to allow rewinding of the take-up spool by hand even when the cassette is closed.

To use such a cassette 1 z. B. placed in a correspondingly shaped housing of a hand roller, in which a transmission gear for driving the take-up reel from the supply reel is attached with a slip clutch between the two. Such gears are known so that they do not need to be discussed in more detail here. This gearbox has corresponding pivot bolts for the supply reel 10 and the take-up reel 11, which when the cassette 1 is inserted into the hand roller housing (not shown) in the openings 26 and 27 provided on the cassette (corresponding to the interior of the supply reel 10 and Take up reel 11) and then in a suitable manner, for. B. by a corresponding positive connection, drive the coils 10 and 11. In this way, the gearbox, which is always needed and does not have to be replaced, is structurally separated from the cassette and is always ready to be received within the hand roller housing.

As shown in Fig. 2, the contact point of the pressure bar 14 ', the base 13 of the support leg 12 and the central axis A of the take-up spool 10 lie on a common line of action L (in the initial position of the support leg 12 or the application bar 14, that is, without springing out).
The application bar 14 and the support leg 12 can be formed together with the tension spring 6 as a common, one-piece part. The foot point 13 of the support foot 12 is connected to the foot point of the tension spring 6 by a solid part 28 which is suitably rigidly connected to the cassette 1 or the side plate 2b, which can preferably be done by a suitable plug connection. This z. B. a quick replacement of the entire part possible, for example, in the event that a differently shaped application bar is to be used for a different belt. The replacement can take place in such a way that the complete part is replaced by a completely different part with a new application bar. There is also the possibility, however, that the application bar 14 is only plugged onto the end of the support leg 12 and removed after removal and can be replaced by a new plugged-in job bar.

When the cassette is closed, as shown in FIG. 1, a viewing window 3 is provided at a suitable location in the side plate 2a in order to signal the winding condition of the supply reel to the user and to inform him in good time of an end of reel supply.

If the cassette is to be inserted into a hand roller, of course, a corresponding opening must also be provided in the housing of the hand roller at the point at which the application element 4 protrudes forward from the cassette.

The roller is now moved by the user over the substrate. B. the adhesive film or the cover film to be transferred, held in such a way that the application bar 14 protruding from the housing is placed in an inclined position against the substrate, as shown in Figures 3a to 3e or Figures 4a to 4d is.

With the pressure edge 14 ', the tear-off edge 29 (see FIG. 3a) of the adhesive film 5a, which is present on the carrier film 5 (up to the pressure edge 14'), is pressed against the substrate 17 (see FIGS. 3a to 4d) and so the output contact between adhesive film 5a and substrate 17 is created for the beginning transfer process. The user will automatically exert some pressure on the hand roller, whereby the support foot 12, which is fixed with its base 13 and non-rotatably attached to the side plate 2b of the cassette 1, so far until the stop area 7 comes to rest against the counter stop 8 and thereby ends the rebound movement.

The individual sequences of this process are again shown in principle in FIGS. 3a to 3e:
Fig. 3a shows the end of the support leg 12 with the application bar 14, the pressure edge 14 ', the upper projection 7 and the counter-stop 8, which at a distance f, the maximum deflection of the pressure edge 14 'sets are still apart. Here, the carrier film 5 coming from the supply reel to the pressure edge 14 'is still on its substrate 17 facing the outside with the film z. B. an adhesive film 5a provided, which ends at the front in a tear-off edge 29.

Fig. 3a shows the state just before placing the pressure edge 14 ', here the tape guide for the carrier film 5 shows a tensioned tape.

3b shows a point in time after touchdown, at which the application bar 14 is already fully extended and the stop area 7 has come into contact with the stop 8 fixed to the frame. As a result of the rebound, the band 5 is now no longer taut behind the pressure edge 14 ', but somewhat relaxed. If now, which occurs frequently in practice and is shown in Fig. 3b, the tear-off edge 29 of the film 5a does not yet come into direct contact with the substrate 17 at this first mounting position, for example because in the course of the rebound movement, the pressure edge 14 'on the 3c, the so-called "ironing" of the tear-off edge 29 against the substrate 17 can take place, as shown in FIG. 3c, by reducing the angle of attack (which can be achieved by an increased contact pressure of the user!), by shifting the pressure point of the application bar 14 somewhat towards the rear toward the tear-off edge 29. Once the "ironing", i.e. H. the connection of the tear-off edge 29 of the adhesive film 5a to the base 17 has taken place, it is only necessary to move the hand roller over the desired application distance with constant pressure against the substrate 17.

3d shows an intermediate point in time from this process. Here, the film 5a is continuously released from the carrier film 5 onto the substrate 17 until the desired amount of adhesive has been transferred there. At the end of the transfer, as shown in FIG. 3e, the hand roller is relieved again, which means that the support foot 12 springs out again (not shown in the figures), the stop region 7 is removed from the counter-stop 8 again, and thus the tape guide 5 as a whole is tightened again. The belt tension also increases the friction, which leads to an almost optimal tear. If the roller is then lifted off, the adhesive film 5a is torn off along a new tear-off edge 29 'and the device is again in the starting position already shown in FIG. 3a. The corresponding adhesive film 5a is then applied to the substrate 17 over the desired distance Y, as shown in FIG. 3e.

In Fig. 2 the direction of rotation or movement during the unwinding or rewinding process is shown on the individual elements with arrows:
When using the device, the supply spool 10 rotates in the direction of arrow w about its axis A, whereby the tape 5 in the direction of arrow v to the pressure edge 14 'and around it again via the compensating spring 6 to the winding spool 11, which runs in the direction of Arrow u is rotated and the carrier film 5 freed from the film 5a is wound up.

As shown in FIGS. 3a to 3e, the application bar 14 has a thickness T (FIG. 3e) which is significantly greater than the thickness t of the resiliently bendable support leg 12 which holds the application bar 14. It should be noted that the difference in thickness shown in the basic representations of the figures is not to scale. A thickness T which is at least 1.25 times the thickness t of the support foot 12 is preferably used for the application bar 14.

4a to 4d show different possibilities for the formation of the curvature on the pressure edge 14 'of the application bar 14 (in a basic, greatly enlarged detailed illustration):
4a (as also in FIGS. 4b to 4d), in the basic side view, shows an application bar 14, which in the position of use is placed obliquely against the surface of a substrate 17 and carries the stop area 7 at its rear upper end.

In the embodiment shown in Fig. 4a, the application bar 14 has a pressure edge 14 'which is semicircular in cross section (constant radius R corresponding to half the thickness T of the application bar 14).

In the form of Fig. 4b, the rounding of the pressure bar 14 'is designed so that, seen in cross-section, starting from the top 30 of the application bar 14, there is initially a circular configuration (radius R) about an angle of 90 °, which but then continues to the inlet on the underside of the application bar 14 in a curvature with a significantly larger radius R '. In this way, compared to the embodiment according to FIG. 4a, a somewhat larger contact area between the pressure edge 14 'and the surface of the substrate 17 is achieved, as can be seen from the figures.

4c shows yet another cross-sectional shape, in which, starting from the surface 30 of the pressure bar 14, there is initially a circular bend with a radius R extending over an angular range of approximately 90 ° or somewhat larger, but this then continues The course merges into a curvature with a much larger radius R ", it also being possible to choose a shape here in which the curvature following the curvature with a radius R runs with a continuously increasing radius. Such an embodiment is particularly suitable, in order to facilitate the "ironing" of the tear-off edge of the film to be transferred, because with this shape for the application bar 14, a particularly significant shift of the pressure point towards the rear (ie counter to it) is achieved by a small reduction in the angle of attack (for example by a slight increase in the contact pressure) the direction of transport of the belt 5) can be achieved.

4d finally shows a very special embodiment of the application bar, in which in the region of the front end of the application bar 14 in addition to the here semi-circular with a relatively small radius r 'curved pressure bar 14' a parallel to this, from it, however, a protruding heel edge 18 is formed which is offset to the rear by a distance to the rear (that is, seen in the opposite direction of conveyance v of the belt 5). Between the heel edge 18, which has a semicircular cross-section with a very small radius r ", and the pressure bar 14 'connected downstream in the direction of the band movement, a recess 19 is formed. The radius of curvature r" of the heel edge 18 is preferably at most half as large as that Radius of curvature r 'of the pressure edge 14'. The two edges 14 ', 18 are arranged relative to each other so that their common tangent y (Fig. 4d) forms an angle of attack α to the direction of the longitudinal axis X of the application bar 14, which is at least 35 °, at most 45 °, but preferably 40 ° . In the normal use position shown in Fig. 4d, only the pressure edge 14 'presses the tape against the counter surface of the substrate 17, this being used for the ongoing transfer of the film 5a from the carrier film 5 to the surface of the substrate 17, as already described becomes. However, if at the beginning of the transfer process the tear-off edge of the adhesive has to be "ironed on" because it may not be immediately captured by the pressure edge 14 'or because the substrate surface is particularly smooth, then such an application bar 14 requires only a slight one Reduction of the angle of attack α in order to additionally press the edge formed by the heel 18 behind the pressure edge 14 'against the surface of the substrate 17. This creates a sufficient initial contact, which makes it possible to start the application process by further relative movement between pressure bar 14 and substrate 17.

Finally, FIG. 5 shows a basic perspective view of the front end of a support leg 12 with an attached application bar 14, stop area 7 attached to it and part of the associated counter-stop 8 assigned to it. As shown in FIG. 5, the stop area 7 is on the Surface 30 of the applicator bar 14 is arranged approximately in the middle and offset to the rear (by a distance D from the pressure edge 14 ') so that it runs on its base surface to the rear end 21 of the applicator bar 14. The Projection 7 has two side surfaces 22, 23 which converge obliquely upwards and form a rounded tip 24. At the same time, a front surface 25, which rises from bottom to rear and upwards at an angle, is also provided on its pressure edge 14 'facing the front, so that finally the upper rounded end surface S, seen in the longitudinal direction of the application bar 14, has a much smaller length than the stop area 7 on its corresponding base surface. The rear surface of the stop region 7 opposite the front surface 25 can likewise have a slight inclination towards the front, but also have a coplanar orientation to the firing surface 21 of the application bar 14. The shape of the stop area 7 can, however, also be carried out overall so that the rounded end surface S attached at the top does not have a cylindrical section-shaped configuration, as shown in FIG. 5, but instead a spherical segment-shaped configuration.

When the support foot 12 springs up in the direction of the stop 8, this upper end face S comes into contact with the underside of the counter-stop 8, and if this should be of a flat design, there is essentially a line contact here which is only within the framework of the inherent elasticity the material of both stops leads to a certain areal expansion. Very particularly preferably, however, on the underside of the counter-stop 8 facing the stop area 7, where the contact surface S of the stop area 7 comes into contact when the support foot 12 springs out, a counter-support surface shaped in accordance with this surface S is formed, thereby providing an even better support option, especially with large power transmission, is created.

Since it is a very small and thin part in the support leg 12, z. B. with a slightly tilted posture of the device when pressing the tape through the application bar 14 against a surface due to the elasticity of the support leg 12 (which is a straight element designed for elastic deformation) also a corresponding small twist of the same about its longitudinal axis to compensate for the tilted posture of the device and the position of the application bar 14 in contact with the substrate surface, in which, especially when the stop area 7 is formed as shown in FIG. 5, also in the support area S between the stops 7 and 8 a corresponding twist can be accommodated without difficulty. The contact pressure exerted by the user on the device, which is transmitted to the application bar 14 via the counter-stop 8 and the stop area 7, can also be transferred well between the stop parts in the embodiment of the projection 7 shown on the top of the order bar 14 in FIG. 5 are when heir a certain angular adjustment occurs due to tilting, the torsional forces occurring in the support foot 12 acting as restoring forces when relieved.

It goes without saying that stop area 7 and counter-stop 8 can also be attached in an inverted arrangement.

Claims (19)

1. An arrangement for transferring a film (5a) from a carrier foil (5) on to a substratum (17), with a housing (1) or frame in which a supply spool (10) and a take-up spool (11) for the carrier foil (5) are accommodated, wherein the carrier foil (5) is guided over an applicator element (4), protruding from the housing (1) or frame, for the pressing of its film side against the sub-stratum (17) and thence back into the housing (1) or frame on to the take-up spool (11), and the applicator element (4) is capable of springing out under pressure in the direction of the housing (1) or frame as far as a stop (7, 8), characterised in that the applicator element (4) is made in the form of a lengthy support foot (12) protruding obliquely and capable of springing elastically out from a foot point (13) non-rotatably fixed on the housing (1) or frame, which foot is provided at its free end with a rigid applicator strip (14) which comprises at its side facing the carrier foil (5), for the pressing of the carrier foil (5) against the substratum (17), a rounded-off presser edge (14') with a radius of not more than 1.5 mm., and at a distance (D) from the presser edge (14') an upper stop region (7), with which it can be supported through a counter-stop (8) on the housing (1) or frame, for the limitation of the outward springing travel (f).
2. An arrangement according to Claim 1, characterised in that the applicator strip (14) is replaceable.
3. An arrangement according to Claim 2, characterised in that the applicator strip (14) is fitted in frictional engagement on to the support foot (12).
4. An arrangement according to one of Claims 1 to 3, characterised in that the applicator strip (14) is made substantially shorter and substantially thicker than the support foot (12), its length preferably amounting to one quarter to one third of the length of the support foot (12) and its thickness (T) to at least 1.25 times the thickness (t) of the support foot (12).
5. An arrangement according to any one of Claims 1 to 4, characterised in that the applicator strip (14) and the support strip (12) are of different materials.
6. An arrangement according to any one of Claims 1 to 5, characterised in that the presser edge (14') of the applicator strip (14) is provided with a radius (R, R', R") of curvature which decreases as seen in the direction of displacement (v) of the carrier foil (5), the smallest radius of curvature (R; r') being not greater than 1.5 mm.
7. An arrangement according to any one of Claims 1 to 5, characterised in that the presser edge (14') of the applicator strip (14) is provided with a curvature (R) of circle segment form in cross-section.
8. An arrangement according to any one of Claims 1 to 7, characterised in that, on the end (21) of the applicator strip (14) facing the carrier foil (5), there is fitted beside the presser edge (14') a protruding and likewise rounded heel (18) arranged parallel to the presser edge and separated from it by a depression (19), which heel has a substantially smaller radius (r") of curvature than the presser edge (14'), while the common tangent (y) of presser edge (14') and heel (18) forms with the longitudinal axis (X) of the applicator element (4) an angle (α) of at least 35° and at most 45°, but preferably of 40°.
9. An arrangement according to any one of Claims 1 to 8, characterised in that the upper stop region is made in the form of a hump-like projection (7) centrally on the applicator strip (14).
10. An arrangement according to Claim 9, characterised in that the projection (7) is made in one piece with the applicator strip (14).
11. An arrangement according to any one of Claims 1 to 10, characterised in that the stop region (7) is fitted on the (upper) end region (21), facing away from the carrier foil (5), of the applicator strip (14).
12. An arrangement according to any one of Claims 9 to 11, characterised in that the projection (7) comprises, transversely and perpendicularly to the longitudinal direction of the applicator element (4), a cross-section with upwardly-converging side faces (22, 23) and a rounded-off tip (24).
13. An arrangement according to Claim 12, characterised in that the projection (7) has, on its forward side facing the presser edge (14') of the applicator strip, an upwardly obliquely rising front face (25).
14. An arrangement according to any one of Claims 9 to 13, characterised in that the projection (7) is made with curvature of cylinder segment or sphere segment form on its upper side facing the counter-stop (8).
15. An arrangement according to any one of Claims 9 to 14, characterised in that, on the housing (1) or frame for the abutment of the projection (7), there is formed an appropriately-formed counter-stop face.
16. An arrangement according to any one of Claims 1 to 15, characterised in that the support foot (12) is made in the form of a toggle lever, the outward angle (20) being directed in the direction towards the carrier foil (5) extending between supply spool (10) and applicator strip (14) and - seen in a plane perpendicular to the presser edge (14') - the points fixed by the presser edge (14'), foot point (13) of the support foot (12) and axis (A) of rotation of the supply spool (10) lying on one straight line (L).
17. An arrangement according to any one of Claims 1 to 16, characterised in that the support foot (12), the applicator strip (14), the stop region (7) and the counter-stop (8) are of synthetic plastics material.
18. An arrangement according to any one of Claims 1 to 16, characterised in that the support foot (12) comprises a resilient metal strip.
19. An arrangement according to one of Claims 1 to 18, characterised in that the frame which receives the supply spool (10) and the take-up spool (11) and retains the applicator element (4; 12, 14) is formed as a replaceable cassette (1) which,in turn,can be inserted into the housing of a hand implement.

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