EP0368070A2 - Manual device for transferring a film from a carrying ribbon to a substrate - Google Patents

Abstract

In a manual device for transferring a film (28) from a carrying ribbon (22) to a substrate, in which, in a housing, the carrying ribbon (22) is guided from a smaller supply reel (3) to a contact edge (33) of an application foot (31), which projects outwards from the lower part of the housing, and from the foot back into the housing onto a larger take-up reel (4), supply and take-up reels (3, 4) being coupled to one another via a sliding clutch which acts in the direction of rotation, and guide means for the ribbon-guide of the carrying ribbon (22) being arranged on the housing, supply reel (3) and take-up reel (4) are arranged axially next to one another as well as inclined at an acute angle to one another. In this connection, the smaller supply reel (3) projects at the bottom into the inner space (24), which is open on the side facing the supply reel, of the larger take-up reel (4), while it lies completely outside the same with its upper side. Furthermore, the sliding clutch is arranged in the central region of both reels (3, 4) and between them. The guide means in the ribbon-guide of the carrying ribbon (22) are arranged between the supply reel (3) and the application foot (31). <??>Lastly, connected after the contact edge (33) of the application strip (32), which is arranged at the end of the application foot (31), there is, inclined at an angle to the strip, a guide edge (34) for the lateral diversion of the carrying ribbon (22) in the direction towards the take-up reel (4). <IMAGE>

Description

The invention relates to a hand-held device for transferring a film from a carrier tape to a substrate, in which the carrier tape in a housing from a supply spool to a pressure edge of an applicator foot projecting outwards at the bottom of the housing and from there back to a larger one The take-up spool is guided, the supply and take-up spools being coupled to one another via a slip clutch that is effective in the direction of rotation, and with guide means attached to the housing for the tape guide of the carrier tape.

Known hand-held devices for transferring an adhesive film applied to a carrier tape or a double-sided adhesive tape received there onto a substrate, e.g. B. on a paper surface for gluing another paper or the like, have an arrangement of supply spool and take-up spool in one plane. The slip clutch, which must be provided between the two rotary receptacles for the coils, is driven by two meshing gears connected to the pivot pins for attaching the coils, which are mounted in a second plane next to the coils. This has to As a result, the tape guide and thus also the pressure area of the carrier tape at the end of the application element, if one wants to achieve the smallest possible width of the overall housing, is not centered on the housing width, which means that the device is not equally suitable for left-handers and right-handers. However, if you still want to achieve a tape guide that is central to the housing width, an unnecessarily large distance from the housing side wall there must be provided on the side of the two coils, which is opposite the gearwheels: this requires a particular unwieldiness of the device and an avoidable additional material expenditure. In principle, however, the housing of such devices is in any case relatively large, since it must be able to accommodate the coils lying next to each other in one plane (and each filled with maximum tape supply), which per se results in a certain unwieldiness of the device, particularly when used can lead to handling difficulties by children or awkward persons. In addition, because of the relatively long length of the device housing, it is easy to take along, for example in the pocket of a piece of clothing or the like. not possible because it is too large or too bulky for this.

In a known device described in DE-PS 37 18 065, the application element is designed in the form of a holding foot which projects obliquely from the housing and is provided at its free end with a rotatable deflection roller for the carrier tape. The axis of rotation of the deflection roller lies between the axes of rotation of the two spools, which results in a relatively short length of the carrier tape between its outlet from the supply spool and its entry point on the take-up spool. As a result, the use of additional guide devices for the tape guide is unnecessary and the frictional forces acting on the carrier tape along the tape guide are relatively low. The entire arrangement of the pressure foot, however, requires that it runs out on the underside of the housing in a central area thereof, so that the pressure area of the deflection roller, on which the carrier tape is pressed against the substrate when the device is in use, is still clearly from the front end of the Device housing is removed. This results in an unfavorable position of the pressure point against the substrate, which makes handling of the device particularly difficult when it cannot be viewed from the side when in use (for example when the user is moving the device towards himself).

Also in another hand-held device known from DE-OS 36 38 722, the coils are arranged next to one another in one plane, the position of the coils and the external design of the overall housing, however, being selected such that the application foot with the pressure edge at the front end of the (there tapering) housing protrudes forward. In this device, however, the pressure edge and application foot are not arranged in the center of the housing, which results in a minimization of the housing width, but the handling is significantly less favorable for left-handers than for right-handers. In addition to the tape guide of the carrier tape - seen in its transport direction - the pressure edge of the application foot guide means for the carrier tape downstream, which cause a deflection of the carrier tape running into the housing towards the take-up spool, which only tapering to the front of the device, which is favorable for handling Housing training is possible. The slipping clutch is driven by a gearwheel mounted next to the common coil plane, whereby the drive (as with the first-mentioned device) takes place from the supply roll. The additional frictional forces occurring on the guide means between the pressure edge and the take-up spool, which are additionally effective on the carrier tape, must also be absorbed via the gear mechanism and the slip clutch, which leads to an increased dimensioning of these parts. This device can be used precisely by the user due to its shape, because of the additional drive forces to be transmitted through the gear transmission and the slipping clutch (due to friction on the guide means), however, less favorable for the design of the transmission and overall of a remarkably large housing design, which the use the device z. B. difficult by children and easy portability z. B. in the pocket of a garment or the like. still not allows.

Proceeding from this, the object of the invention is to further develop a hand-held device of the type mentioned at the outset in such a way that significantly improved manageability, in particular a considerably smaller and more compact design of the housing, and overall a noticeably low construction cost are achieved.

According to the invention, this is achieved in that, in a generic hand-held device, the supply reel and the take-up reel are arranged axially next to one another and set at an acute angle to one another, the smaller supply reel (with the tape supply carried by it) at the bottom in the interior space open on the side facing it of the spool core of the larger take-up spool protrudes while it lies with its upper side completely outside this interior of the spool core of the take-up spool, that the slip clutch is arranged in the middle area of both spools between them, and that the guide means in the tape guide of the carrier tape between the point of departure of the carrier tape the supply spool and the application foot are attached, and that the pressure edge is followed by a leading edge inclined at an angle to it, which is used for the lateral derivation of the carrier tape from the pressure edge in the direction of the larger rewinder oil spool serves.

In the device according to the invention, the coils arranged next to one another in the axial direction initially ensure that the housing length does not have to be designed to accommodate two coils arranged one behind the other on the same plane, which results in a noticeable reduction. Due to the V-shaped positioning of the two coil levels against each other, the protrusion of the smaller coil below into the interior of the coil core of the larger coil and the arrangement of the slip clutch in the central area of both coils and between them the housing width due to the side-by-side arrangement of the two coils is reduced a practical minimum, with maximum use of space inside the housing and a minimum total volume enclosed by the housing occurs. In addition, the possibility is created that the housing side walls diverge upwards in a V-shape from the lower housing base, as a result of which the housing is given a housing width that increases from bottom to top. This creates a wedge-shaped downward tapering housing shape, which is particularly favorable and advantageous for use. Because at the top, where the contact pressure is applied by the user's fingers (since the housing is loaded by the user from top to bottom in the direction of the application element), there is the greatest width of the housing and thus a large contact surface for the pressure fingers. The wedge shape ensures a particularly good holding in the hand because the housing can be clamped on the side walls tapering downwards in the direction of the upper pressure system formed by the palm of the hand. In addition, both side walls (and thus the lateral gripping surfaces) diverge upwards against the direction of sliding for the fingers, which also contributes to a secure and good holding of the device housing in the hand of the user. The V-shaped convergence of the spool planes and the arrangement of the slip clutch between them creates the possibility of arranging the applicator foot attached to the front end of the housing in the center of the housing base, thereby avoiding a band exit from the housing that is displaced on one side and accurately placing the band on the substrate is equally possible for left and right-handed people. Overall, the device according to the invention results in a noticeably shortened and overall more compact design compared to known devices, this in connection with the possibility of a wedge-shaped housing design and a central guidance of the tape when the tape exits, all of which independently improve the manageability. Since only one slip clutch, but no longer a gearbox must be arranged between the two coils, the number of components to be used is also lower compared to known devices, which applies even more to the material expenditure of the entire housing. As a result of the lack of a side gear, the device according to the invention is hardly wider at the top than conventional devices in which, in addition to the coil width, also axially laterally additional space is required to accommodate the gearbox. Because the take-up spool in the device according to the invention has a relatively large diameter from the outset, so that the supply spool can still protrude into the interior of the spool core of the take-up spool even with a full supply of tape, the outer diameter of the take-up spool grows only comparatively slightly even when the entire length of the tape is fully wound. Since the force relationships when using the device are particularly influenced by two influencing variables, namely the decrease in diameter of the supply spool (dispenser spool) and the increase in diameter of the take-up spool, this means that the force relationships in the device according to the invention over the entire length of the tape are relatively less strong than at Known devices are changed, in which approximately the same size, significant increases or decreases in diameter occur on both coils. This also contributes to improved handling of the device according to the invention. The empty diameter of the take-up reel in the device according to the invention is always larger than the maximum diameter (measured with a full supply of tape) of the supply reel, which is why the unwinding speed of the supply reel is always greater than the winding speed of the take-up reel, so that with respect to the drive conditions there is always a positive slip of the take-up reel relative to Take-up reel and thus always the required tape tension is ensured, which makes the use of a transmission gear completely unnecessary, since under no operating conditions it is necessary to build up an acceleration via a gear. The wedge shape of the housing in the device according to the invention also allows standing up, with little space being required on the storage surface (similar to adhesive bottles). The special arrangement of both spools ensures that the carrier tape on the dispenser spool can always be removed freely and unhindered from the winding because the supply spool there lies completely outside the interior of the spool core of the winding spool.

Since in the hand-held device according to the invention the carrier tape is wound directly onto the take-up roll behind the pressure bar and all for the required deflection of the tape is only between the supply reel and the pressure bar, the tape deflection forces are provided directly by the user during use and, unlike with a deflection behind the job, no longer have to be absorbed by the slip clutch, which facilitates its dimensioning.

In the device according to the invention, the angle of attack between the two coil planes is preferably selected in the range from at least 10 ° to a maximum of 15 °, but advantageously with 12 °. The carrier tape, which has to be twisted by half the angle of attack between the two coil planes from the supply reel to the pressure edge and from this to the take-up reel, can be selected between 5 ° and 7.5 ° with the required twisting when the angle of attack is selected within the specified angle range (each between the pressure edge and one of the two spools) can be performed without any problems: these angles of attack are sufficient for practically sensible spool diameters to allow unhindered removal of the carrier tape even with a full supply spool at the top, and at the same time the tape is only relatively weak between To twist spools and pressure edge, which is why this angular range leads to an optimization of the outer shape of the housing (in view of the requirement of small width and at the same time sufficient height for the unimpeded removal of the carrier tape from the supply spool).

In the device according to the invention, the application foot is very particularly preferably designed such that its pressure edge lies in a plane which runs perpendicular to the bisector of the spreading angle between the two coils and through the common intersection line of the two coil center planes. This plane represents the cutting plane, which is obtained when the winding areas of both coils are extended to the mutual intersection at their sections converging below. This "common" cutting plane thus represents exactly the central plane from which the two coils have the same angular position with respect to the strip with the same deviation and without the strip outlet being shifted on one side.

In a further advantageous embodiment of the invention, the slip clutch is designed with a force fit that is effective within the coil core of the smaller supply coil.

In the invention, the take-up spool is particularly preferably provided with a central support bolt which projects from the interior of its spool core into that of the spool core of the supply spool and is hollow on one side and which is supported with its projecting end in a bearing recess in the side wall on the side of the supply spool and on it the other end with its inner bore open there sits on a journal on the other side wall of the housing. As a result, double axial support of the take-up spool is achieved on both housing side walls in a simple manner.

Also preferably distributed around this support bolt are a plurality of radially elastically deflectable coupling tongues projecting in the direction of the supply spool, spreading there, with coupling teeth projecting radially outward at their ends, which at least partially in a corresponding internal toothing attached to the spool core of the supply spool intervention. This creates a simply constructed, but effective in the direction of rotation slip clutch between the two coils in their central central area, which ensures problem-free compensation of the difference in the angle of the coils over the entire range of rotation with a consistently effective slip clutch effect.

Another preferred embodiment of the device according to the invention also consists in that the supply spool on its side facing the take-up spool is provided with a flanged disc, at least in its area lying radially outside the spool core, on the outer surface of which face the take-up spool, a circular support projection is arranged in the lower area, in which the supply spool runs into the interior of the spool core of the take-up spool, against an appropriately designed shape, in Interior of the coil core of the take-up spool engages and rests on the radial support disk, which is also in the form of an annular circumference, and rests there, so that, in addition to its support on the housing side wall carrying it, the supply spool is also supported on the opposite housing side wall.

In the invention, at least two cylindrical deflecting pins are particularly preferably provided as guide means, which are preferably rotatably attached in order to enable a particularly easily running tape pull-off movement. The central axes of the deflecting pins are further preferably arranged parallel to the central axis of the supply spool.

Another advantageous development of the hand-held device according to the invention is that the leading edge is formed in one piece on the application foot, with - again preferably - an application bar in the form of an oblique truncated cone being provided at the end of the application foot to form the pressure edge and leading edge.

Another, likewise preferred embodiment of the hand-held device according to the invention is obtained if the leading edge is arranged on a separate component which is connected downstream of the application foot and which - again preferably - consists of a cylindrical deflecting pin. As a result, the leading edge for laterally deflecting the tape guide of the carrier tape freed from the film in the direction of the take-up reel can be realized in a simple manner only by an appropriate alignment of the cylindrical deflecting pin without using a complicated shaped pressure element.

Preferably, the housing side wall adjacent to each coil is also formed perpendicular to the central axis of the coil in question, ie parallel to the coil plane, which results in the smallest possible cross-sectional area perpendicular to the longitudinal central plane of the device housing.

Because of its compact shape, the handheld device according to the invention can be designed particularly advantageously as a disposable or disposable device. Another preferred embodiment also consists in the fact that all parts essential for the function, namely supply and take-up reel, all tape guiding devices and the slip clutch are accommodated in an interchangeable cassette which also carries the application foot, the pressure bar, the pressure edge and the leading edge, so that when the tape supply is used up, only the housing has to be opened appropriately, the cassette it contains has to be removed and a new cassette has to be inserted in order to be ready for operation again.

• Fig. 1 einen (vergrößerten) Querschnitt durch ein erfindungsgemäßes Handgerät, wobei die Drehachsen beider Spulen in der Schnittebene liegen;
• Fig. 2 eine nur prinzipielle Darstellung der Anordnung der Spulen und der Bandführung sowie des Andruckelementes bei einem erfindungsgemäßen Handgerät;
• Fig. 3 eine Prinzipillustration zu den Außendimensionen für eine besonders geeignete Form eines Gerätegehäuses bei einem erfindungs­gemäßen Handgerät;
• Fig. 4, 5, 6 und 7 reine Prinzipdarstellungen unterschiedlicher Aus­führungsformen für die Ausbildung und Anordnung von Andruckkante und Leitkante;
• Fig. 8 eine vergrößerte Detaildarstellung des Kupplungsbereiches innerhalb des Spulenkerns der Vorratsspule (Ausschnitt aus Fig. 1);
• Fig. 9 eine vergrößerte Detail-Schnittdarstellung längs IX-IX aus Fig. 8, sowie
• Fig. 10 eine vergrößerte Detailansicht des Kupplungs-Zahneingriffs in Blickrichtung D in Fig. 9.

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

• 1 shows a (enlarged) cross section through a hand-held device according to the invention, the axes of rotation of both coils lying in the sectional plane;
• 2 shows a basic illustration of the arrangement of the spools and the tape guide and of the pressure element in a hand-held device according to the invention;
• 3 shows a basic illustration of the external dimensions for a particularly suitable form of a device housing in a hand-held device according to the invention;
• 4, 5, 6 and 7 are purely schematic representations of different embodiments for the formation and arrangement of the pressure edge and the leading edge;
• FIG. 8 shows an enlarged detailed illustration of the coupling area within the coil core of the supply coil (section from FIG. 1);
• Fig. 9 is an enlarged detail sectional view along IX-IX of Fig. 8, as well
• 10 is an enlarged detail view of the clutch tooth engagement in viewing direction D in FIG. 9.

1 shows a cross section through a hand-held device for transferring a film from a carrier tape to a substrate, the plane in which the two axes of rotation of the two coils accommodated in the device housing lie is chosen as the sectional plane.

The housing has two housing side walls 1, 2 converging in a V-shape downwards, the top through a housing cover 49, which increases somewhat in cross-section in a roof shape from the two ends of the side walls 1, 2 towards the center, and below through a flat housing base 39 are connected to one another, so that an overall closed housing 36 (see also FIG. 3) is formed.

Arranged in the housing are a supply reel 3 and a take-up reel 4, the coil center planes A-A and B-B of which are set at an angle α V-shaped relative to one another, which corresponds exactly to the angle between the housing side walls 1 and 2.

The supply spool 3 has a spool core 5 and the supply spool 4 has a spool core 6, with a supply of tapes 7 being attached to the spool core 5, which builds up again on the take-up spool 4 in the form of an increasing supply of tapes 8 as it unwinds. 1 shows the initial tape supply 7 on the supply reel 3, i. H. the full tape supply 7 (maximum reel diameter), with no tape supply being wound up on the take-up reel 4 yet. The tape supply 8 shown in dash-dot lines in FIG. 1 represents the conditions that occur when the entire tape supply 7 is wound off the supply reel 3 and completely wound onto the take-up reel 4.

The spool core 6 of the take-up spool 4 is supported on its axial end facing the side wall 2 by a support disk 9, while it is open at its other axial end facing the supply spool 3, as a result of which one inside the spool core 6 of the take-up spool 4 is more open to the other spool Interior 24 arises.

The take-up spool 4 also has a central, hollow, cylindrical direction in the direction of the other spool in its central region jumping supporting bolt 10, the longitudinal extent of which is greater than the width of the spool core 6, so that the supporting bolt 10 protrudes out of the interior of the take-up spool 4 and into an interior 23 formed similarly within the spool core 5 of the supply spool 3.

The support pin 10 has in its interior a bore or a cylindrical opening 48, which is open at the opening of the support pin 10 in the support plate 9, so that there the winding spool 4 with the support pin 10 is attached to a corresponding on the housing side wall 2, projecting into the interior of the housing projecting journal 11.

The central support pin 10 is provided in its other end projecting into the interior 23 of the pivot 5 of the supply reel 3 with a frustoconical projecting central bearing pin 20 which projects into a bearing receptacle 21 formed on the other housing side wall 1 and is supported there.

On the housing side wall 2 there is also an annular concentric around the central axis of the bearing pin 11 and at a certain distance from it, a little protruding into the interior of the housing annular collar 15, which has an abutment on its inner ring surface projecting beyond the housing side wall 2. or Bearing surface for the support disk 9 of the take-up spool 4 forms so that it cannot run against the housing side wall 2. This annular collar 15, in conjunction with the bearing journal 11 and the bearing receptacle 21, provides good guidance and support for the central axis of the take-up spool 4, which is physically formed by the central support pin 10, the take-up spool 4 being supported on both housing side walls 1 and 2 lying opposite one another.

As can also be seen from FIG. 1, an axially circumferential flanged disk 16 is formed on the axially inner end of the spool core 5 of the supply spool 3 and extends radially outward from there and laterally supports the tape supply 7 Circumferential support projection 17 is attached, which in the embodiment shown has a trapezoidal cross-section (but with unequal-length side legs).

The supply reel 3 inclined to the take-up reel 4 by the angle α projects with its lower end (including the maximum tape supply 7 attached to the reel core 5) into the interior 24 inside the reel core 6 of the take-up reel 4, to the extent that the support projection 17 in it Area in turn engages in a guide gap and is supported there. The radially outer ring projection is in the form of an annular collar 18 and the radially inner ring projection in the form of an annular support sleeve 19. The inclination of their mutually facing side flanks is selected so that the support projection 17 on the flanged disc 16 of the supply reel 3 can be positively supported there, while at the same time also supporting the supply reel 3 axially to the take-up reel 4 by engaging the inner surface of the flanged disc 16 , which directly adjoins the support projection 17 radially inwards, against which the end surface of the sleeve 19 which is correspondingly adapted in its inclination can take place. In addition, an annular concentric around the axis of rotation of the take-up reel 3 at a distance from it, slightly protruding into the interior of the housing, is also provided on the housing side wall 1, which allows the radial end face of the supply reel 3 to rest there, so that, as even with the other spool, starting of the supply spool 3 or the tape supply 7 on the housing side wall 1 is not possible. Of course, the required guide clearances are provided in the axial guide surfaces which are effective in the different directions and which are shown in FIG. 1 in part to a much larger extent, for better illustration, but are only chosen to be as large as that for a proper one Operation of the device is required.

The setting angle α is 12 ° in the device shown in FIG. 1, which, as can be seen from the figure, results in a favorable arrangement of the coils running into one another. While the supply spool 3 on its underside with the tape supply 7 that it carries largely protrudes into the interior 24 within the core 6 of the take-up spool 4, it is at its upper end, as FIG. 1 shows well, completely outside of the interior 24, so it is located in its full width next to the take-up spool 4. This makes it possible for the carrier tape 22 in the housing to be pulled backwards from the supply spool 3, as can be seen in the basic representation of the situation from FIG. 2.

The supply reel 3 is in turn seated on a bearing journal 12 which is arranged on the housing side wall 1 and projects into the interior of the housing. This journal 12 has an end surface 13 which is inclined in cross section and inclined by an angle β to the central plane AA of the coil, the angle β being chosen so that the central support bolt 10 projecting from the take-up spool 4 protrudes with its bearing journal attached at the end 20 is made possible. This means that the angle β must be chosen equal to the angle α.

The bearing pin 12 runs concentrically to the bearing seat 21, but radially outside the same; on it, the supply spool 3 is supported on its axial end facing the housing side wall 1 via the support disc 50 which is present there and which supports the coil core 5 and which in turn rests on its axial outer surface on the annular collar 14 of the housing side wall 1.

The bearing receptacle 21 is also inclined on its inner end surface, which protrudes slightly above the end surface 13 of the bearing journal 12, in the same direction as this and forms a support system there against the radial end face of the central support bolt 10 radially outside the bearing journal 20.

On the radial inside of the coil core 5 of the supply coil 3 is one circumferential internal teeth 27 attached, engage in the clutch teeth 26, which are attached radially outwardly at the end of elastic, radially deflectable to the axis of rotation of the take-up reel 4 elastic coupling pawls. These coupling pawls 25 are arranged concentrically around the central support bolt 10, whereby they project obliquely from the support disk 9 radially outwards and in the direction of the supply spool 3 and their length, as shown in FIG. 1, is chosen so that its axial End faces lie in one plane with the radial end face of the support bolt 10, from which the bearing pin 20 projects. The entire arrangement is selected so that the coupling teeth 26 always mesh with the internal toothing 27 on the coil core 5 of the supply reel 3 along the entire circumference of rotation. As a result of the angular adjustment of the coils 3, 4 to one another, the point of engagement of the clutch teeth 26 with the internal toothing 27 moves axially along the latter, namely from the upper engagement position, shown in FIG. 1, which is the most axially located inside the housing, to the one in FIG. 1 below shown, axially furthest towards the housing side wall 1 lying engagement position.

The elastic coupling pawls 25, the coupling teeth 26 and the internal toothing 27 overall form a slip clutch which is very effective in the direction of rotation of the two coils 3, 4 and which is shown in greater detail in FIGS. 8, 9 and 10. 8 shows an enlarged detail from FIG. 1, while FIG. 9 shows the detailed sectional view according to section line IX-IX from FIG. 8, that is to say a rotation offset by 90 ° to the sectional plane of FIG. 8 and parallel to the floor plane Section plane in which the engagement between the clutch teeth 26 and the internal toothing 27 takes place exactly symmetrically to the central plane AA of the supply reel 3.

The maximum lateral migration of the point of engagement between the clutch teeth 26 and the internal toothing 27, as seen relative to the central plane AA of the supply spool, lies between the central plane AA of the supply spool 3 and the central plane EE of the coupling teeth 26 when the maximum angle of inclination α (FIG. 8) is reached in front.

The determining variable for such a clutch is the breakaway torque (“slip torque”) at which the intermeshing toothings 26, 27 skip. This breakaway torque is dependent on the contact force of the resilient clutch pawls 25, the frictional resistance (which is largely determined by the choice of material and the pressure ratio of the surfaces rubbing against each other), the tooth flank angles of the toothing 26, 27 and the stroke d 1 (FIG. 9) or d₂ (Fig. 8). Under all the intervention sizes mentioned, the immersion depth d 1 or d 2 or the corresponding lateral deflection stroke change particularly markedly during a full revolution. In order to always have a sufficient immersion depth and to achieve full effectiveness of the slip clutch, the toothing width L of the clutch teeth 26 (cf. FIG. 8) is dimensioned such that the stroke d₂ is as similar as possible to the stroke d₁ in the middle engagement point according to FIG. 9 (ie parallel to the bottom surface of the housing), whereby it is achieved that even in the worst case with maximum deflection (maximum lateral engagement offset according to FIG. 8) the tooth depth d₂ is not less than the tooth depth d₁ in the engagement position not offset laterally to the central plane AA the clutch teeth 26 and the internal toothing 27.

As shown in FIG. 10, the flank inclination of the clutch teeth 26 on the clutch tongues 25 or the internal toothing 27 on the coil core 5 is selected such that the elastic deflection of the clutch blades 25 has only taken place to the extent that the breakout torque required for the desired tension occurs. that the respective clutch tooth 26 comes out of engagement with the corresponding counter tooth 27 of the internal toothing and the desired skipping effect occurs.

1 shows the following overall storage of the two coils:

The spool core 5 of the supply spool 3 is rotatably mounted on the supply spool side on the bearing journal 12 and on the drum side at Zugbe stress by pulling off the carrier tape 22 on the ring sleeve 19 of the winding drum 4, which is also effective against axial displacement, while the collar 18 secures against tipping of the supply reel 3 into the interior 24 of the winding drum 4 when the device is at rest. Further axial limits are given for the coil core 5 on the housing side wall 1 by the ring collar 14 and for the winding drum 5 on the housing side wall 2 by the ring collar 15, which is arranged in an area in which axial forces can occur, a twisting of the winding drum 4 however is avoided.

At the bottom of the cross-sectional view of FIG. 1, the position of the application bar CC (corresponding to the position of the pressure edge 33 at the end of the application foot 31), in which the film coating of the carrier tape 22 is transferred to a substrate, is indicated by dash-dotted lines parallel to the bottom 39 becomes. This plane lies at right angles to the center plane through the bisector of the angle of attack α formed by planes AA and BB (i.e. in the housing illustration of FIG. 1: at right angles to the perpendicular center plane of the overall housing) and also runs through the cutting edge S which is at the interface of the planes AA and BB occurs. 1 there is still with thin lines the inlet of the coated carrier tape 22 from the supply reel 3 to the level of the tape section 35 (see FIG. 2) in front of the pressure edge 33 of the application bar 22 and the return of the Free film coating, empty carrier tape 22 in the direction of the take-up reel 4 indicated by correspondingly thin cutting lines, whereby it should be noted that this representation is only intended to indicate the basic positions of the carrier tape 22, but not in the sectional plane that Fig. 1 shows in this form would appear visibly.

2 shows a diagrammatic representation of the spatial assignment of the individual rotational parts and, in perspective, the course of the carrier tape 22:

As shown there, from the tape supply 7 of the supply reel 3 at the top, ie, where the entire bandwidth of the carrier tape 22 lies completely outside the interior 24 of the take-up reel 4, the carrier tape 22 provided with a (hatched) coating 28 on its outside follows pulled off (seen relative to the housing) to a rotatable deflecting pin 29, in order to continue this downward to a further deflecting pin 30 and from there forward to the pressure edge 33 of the application bar 32. Here, in the area 35 of the carrier tape 22, which is located between the last deflecting pin 30 in front of the application bar 32, and this the tape from the orientation that it has due to the employment of the supply reel 3 by half the angle of attack between the reel 3 and 4 rotated so that it has the desired orientation shown in Fig. 1 at the location of the pressure edge 33. It has been shown, depending on the size of the supply spool, that, for example, for a supply spool with an outer diameter of 40 mm and a bandwidth of 9 mm, an angle of attack α between the planes AA and BB of 12 ° is optimal in terms of taking advantage of the advantages Overall device. This means that here the torsion angle of the band section 35 to both sides of the reel is 6 °, which must be achieved in a particularly long section 35 of the band 22, which is also particularly advantageous since the twist of the band occurring per unit length is kept low here can. The application bar 32 with the pressure edge 33 is formed at the end of an elastically suspended pressure foot 31 and has, downstream of the pressure edge 33, an obliquely arranged to this guide edge 34, the position of which is provided on the application bar 32 so that from it that of the film application liberated, empty carrier tape 22, which is fed back into the housing, is already running in the correct orientation towards the take-up spool 4 towards it. Such an assignment of the leading edge 34 and the pressure edge 33 can be achieved, for example, by the wedge-shaped design of the pressure element 32 which can be seen in FIG. The lifting of the tape end indicated in FIG. 2 at the end of the tape section 22 running onto the take-up reel 4 is not intended to represent an actual lifting, but only to clarify what is there on the reel serve as the end of the band.

As FIG. 2 also clearly shows, the setting angle between the two coils 3, 4 gives the possibility that the supply reel 3 projects with its entire tape supply 7 below into the interior space 24, which is formed within the reel core of the supply reel 4, as was already apparent from the cross section of FIG. 1.

4 to 7 now show different options for the design of the application element 32 or for the arrangement of the pressure edge 33 and the leading edge 34:

Fig. 4 illustrates, in a further enlarged basic illustration, the formation of the application bar 32, as it is also shown in Fig. 2, in the form of a lying wedge-shaped part, wherein the lateral deflection angle γ is given, which due to the inclined position of the leading edge 34 opposite a (dash-dotted line) tape 43 occurs, which would occur in a purely cylindrical (dashed line) design of the application element 32. As is further shown in FIG. 4, the leading edge 34 is set at an angle δ with respect to the pressing edge 33, which results in the desired lateral deflection γ.

Fig. 5 shows an alternative embodiment for the formation of the application element 32, which is provided here in the shape of a truncated cone, which likewise leads to the desired lateral deflection γ.

6 and 7 finally represent two further solutions in which the functions of order on the one hand and deflection on the other hand are performed by separate components or elements. Thus, in the arrangement according to FIG. 6, an elastic application foot 31 is used, which slopes in its front end region towards a pressure edge 33. This application foot 31 can be designed to be elastic and thereby give the possibility of delivering the elastically deformable application bar desired in certain coating systems. The carrier tape 22 deflected at the pressure edge 33, which is freed from the film coating behind this deflection point (since this is delivered to the substrate at the pressure edge 33), is passed on to a cylindrical deflection pin 45 which is arranged in the course of the tape and which has a corresponding spatial arrangement Leading edge, that is, run line 34 towards the take-up reel 4.

7, the application bar is finally formed by a cylindrical pressure bar 46, on which the incoming carrier tape 22 is deflected and passed on to a downstream, separate, frustoconical or wedge-shaped guide element 47, which makes an angle δ at the desired angle Forms leading edge 34, which is formed here on the inlet side, while on the outlet side, due to the subsequent cylindrical section-shaped rounding of the part 47, this direction also remains for the running strip.

3 shows, in a simplified, very basic form, the interfaces for the formation of a housing 36 for receiving the entire reel tape guide and pressure arrangement:

The schematically illustrated overall housing 36 is thereby of the two housing side walls 1, 2, which are positioned at an angle to one another, of a housing ceiling 49, which increases in cross section in a roof shape from the upper end of the two housing side walls 1, 2 towards the center of the housing, and of a lower one Housing bottom surface 39 is formed, the housing being provided on its upper side with a bevelled front upper side 41, on which finger brakes 42 are arranged in the form of transverse corrugations, which prevent the pressure fingers of the user resting there from sliding off. Lateral inspection holes 40 for determining the degree of filling of the hand-held device are embedded in the housing side walls 1 and / or 2.

The cross-sections 37 and 38 drawn in dashed lines represent the cross-sections available in the housing for accommodating the overall arrangement in terms of height and length. The hatched lines Surface 38 simultaneously forms a plane for a straight, central band feed from the last deflecting pin 30, while cross section 37 shows the wedge-shaped design of the housing. The inclination of the front housing surface 41 is chosen so that it opens along the line CC into the flat bottom surface 39, ie that the pressure edge 33 of the application element 32 (see FIG. 2), which is arranged exactly in the line CC, is ergonomically optimal with regard to the overall shape of the housing 36, so that the pressure exerted by the user in the direction of the pressure edge 33 or the line CC lies exactly in the line of alignment of the oblique housing front half.

Fig. 3 shows at the same time another possibility: because in the form shown there could also be an interchangeable cassette in which all of the individual parts - as already mentioned in connection with such a design as a housing - are arranged and from the front - Like from a housing - an application foot 31 with pressure bar 32 etc. protrudes. Such an exchangeable cassette could be insertable into a suitably designed receptacle housing which can be opened or closed in a suitable manner (for example by dividing the housing in the longitudinal center plane M) and which only has to be designed such that the applicator foot 31 is inserted from it when the cassette 36 is inserted can protrude outwards with the tape running over it.

Claims (16)

1. Hand-held device for transferring a film from a carrier tape to a substrate, in which the carrier tape is guided in a housing from a smaller supply spool to a pressure edge of an applicator foot projecting outward at the bottom of the housing and from there back into a larger take-up spool , with the supply and take-up spools being coupled to one another via a slip clutch which is effective in the direction of rotation, and with guide means for the tape guide of the carrier tape attached to the housing, characterized in that the supply spool (3) and the take-up spool (4) axially next to one another and at an acute angle (α) are arranged inclined to one another, the supply reel (3) projecting down into the interior (24) of the reel core (6) of the larger take-up reel (4), which is open on the side facing it, while the upper side thereof lies completely outside the reel,
that the slip clutch (25-27) is arranged between them in the central region of both coils (3, 4),
that the guide means are arranged in the tape guide of the carrier tape (22) between the supply reel (3) and the application foot (31), and that the pressure edge (33) has a leading edge (34) inclined to it at an angle (δ) for lateral discharge of the carrier tape (22) in the direction of the take-up reel (4). 2. Hand tool according to claim 1, characterized in that the employment angle (α) between the two coils (3, 4) is 10 ° to 15 °, but in particular 12 °. 3. Hand tool according to claim 1 or 2, characterized in that the application foot (31) is designed and arranged so that its pressure edge (33) in a plane perpendicular to the bisector of the angle of attack (α) between the two coils (3, 4) and runs through the common intersection line (S) of the radial central planes (A, B) of both coils (3, 4). 4. Hand tool according to one of claims 1 to 3, characterized in that the slip clutch (25, 26, 27) with a within the coil core (5) of the smaller supply coil (3) effective frictional connection. 5. Hand tool according to one of claims 1 to 4, characterized in that the take-up spool (4) with one from the interior (24) of its core (6) into the interior (23) of the core (5) of the supply spool (3) protruding , one-sided hollow, central support bolt (10) is provided, which is received with a bearing pin (20) formed on its projecting end in a bearing recess (21) on the associated housing side wall (1) and at its other end with its inner bore open there ( 48) sits on a bearing journal (11) on the other housing side wall (2). 6. Hand tool according to claim 5, characterized in that around the support bolt (10) around in the direction of the supply spool (3) projecting, radially elastically deflectable coupling fingers (25) formed at their ends, radially projecting coupling teeth ( 26), which at least partially engage in an internal toothing (27) attached to the coil core (5) of the supply coil (3). 7. Hand tool according to one of claims 1 to 6, characterized in that the supply reel (3) on its the take-up reel (4) facing side with a flanged disc (16) is provided, on the winding Coil (4) facing outer surface a circular circumferential support projection (17) is formed, which in the lower, interlocking area of both coils (3, 4) against a correspondingly designed, in the interior (24) of the bobbin core (6) of the take-up reel (4th ) on the radial support disk (9), which is also arranged in an annular circumferential support system (18, 19). 8. Hand tool according to one of claims 1 to 7, characterized in that at least two cylindrical deflection pins (29, 30) are provided as guide means. 9. Hand tool according to claim 8, characterized in that the deflecting pins (29, 30) are arranged rotatably. 10. Hand tool according to one of claims 1 to 9, characterized in that the leading edge (34) is formed directly on the application foot (31). 11. Hand tool according to claim 10, characterized in that at the end of the application foot (31) for the formation of pressure (33) and leading edge (34) an application bar (32) in the form of a transverse to the tape guide, oblique truncated cone (47) is formed is. 12. Hand-held device according to one of claims 1 to 9, characterized in that the leading edge (34) is attached to a component (45; 47) connected downstream of the application foot (31). 13. Hand tool according to claim 12, characterized in that the leading edge (34) is formed by a cylindrical deflecting pin (45). 14. Hand tool according to one of claims 1 to 13, characterized in that the housing side wall (1; 2) adjacent to each coil (3; 4) runs in each case parallel to the central plane (AA; BB) of the relevant coil (3; 4). 15. Hand tool according to claim 8 or 9, characterized in that the central axes of the deflecting pins (29, 30) are aligned parallel to the central axis of the supply spool (3). 16. Hand tool according to one of claims 1 to 15, characterized in that the supply reel (3), the take-up reel (4), the guide device (29, 30) and the slip clutch (25, 26, 27) are contained in an exchange cassette, which also carries the application foot (31) with application bar (32) and pressure edge (33) as well as the leading edge (34).

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