EP3468809B1 - Drive unit, belt unit, bridge, driver and stamp therefor - Google Patents

Description

The invention relates to a drive unit, stamp and an impression unit as described in the preambles of claims 1 and 11 to 13.

From the DE 16 54 769 U a drive unit is known in which the belt drive consists of an adjusting wheel and a driver for the conveyor belt, the adjusting wheel and the driver being formed in one piece. Furthermore, a rubber pad is arranged on the driver, which should improve the transport of the conveyor belt.

Next is from the DE 17 96 254 U a drive unit is known in which a soft rubber or rubber-like plastic is attached to the driver. This friction lining has a surface with a hump-like profile. The hump-like profile is intended to ensure that a corresponding deformation occurs and thus safe transport of the tape is to be ensured.

It's from the WO 2006/079129 A1 a type unit is known in which the adjusting wheel is formed from a 2-component injection-molded component. This is intended to improve operator comfort when the adjustment wheel is actuated, since the outer area of the adjustment wheel is made of soft rubber. Again, the driver is commercially formed from a single plastic.

The disadvantage of the above-mentioned prior art is that the rubber pads on the driver brought significant improvements for a short time, but significant disadvantages came about in long-term operation, so that the stamp industry prefers to use one-piece plastic adjustment wheels with drivers made of hard, non-elastic plastics. However, in order to ensure safe transport of the belt, some manufacturers use special surfaces, in particular with grooves or projections, on the driver, with the transport belt being designed correspondingly, so that the systems are more complicated to produce.

Basically, it should be mentioned that with the conveyor belt or just called belt, there are a wide variety of negative signs, in particular numbers or letters, on a belt on the outside, which leave a positive impression when an imprint, in particular a stamping process, is made. In this case, before the imprint is made on a medium, in particular paper, cardboard, fabrics, etc., ink is first absorbed onto the characters via an ink pad by resting against it in order to be able to produce an imprint. The user can use the drive wheel or adjustment wheel to select the character to be printed by turning the drive wheel or adjustment wheel via the driver and a so-called bridge in the impression area, with the bridge serving as a counter-holder for the formation of a nice impression during the stamping process.

The object of the invention is to create a drive system, in particular a belt drive and a drive wheel or adjustment wheel, in which the above-mentioned disadvantages have been eliminated and safe transport can be guaranteed in long-term operation.

The object is achieved according to the invention by the features of the independent claims.

The object of the invention is achieved by a drive unit in which at least the driver of the belt drive is formed from two different materials, in particular from a 2-component injection-molded component, with the outer component resting on the belt or conveyor belt having areas that are thin preferably less than 1.5 mm, in particular 0.4 to 0.8 mm.

The advantage here is that due to the very thin layer of the outermost component, only minimal deformations due to the tension of the conveyor belt are possible in long-term operation, so that the stamp equipped with it can be used over a period of several years, in particular 2 to 20 years. In the case of the systems known from the prior art with appropriately attached rubber bands, it was not possible that such thin layers could be produced and applied. Thick, rubber-like layers or coverings have the major disadvantage that, due to the pre-tensioning of the belt, the covering becomes permanently deformed after a while and the pre-tensioning of the belt thus decreases, so that after a while the belt cannot be transported any further when the adjustment wheel or drive wheel is actuated is possible. This was recognized in corresponding tests and developments and through a corresponding reduction in the layer thickness for the outer layer subject to friction fixed so that long-term tests have shown that it can be used over a longer period of time. Another advantage of such a conveyor belt is that by using two different materials, these can be adapted to the requirements, i.e. the drive wheel is provided with such a material that allows a secure hold for the rotation of the drive wheel, whereas with the driver a material with high frictional resistance for safe and non-slip transport of the belt. A particular advantage is that with a 2-component injection molding production of the belt drive, the outermost layer is held securely, so that it cannot become detached from the entrainment, as was the case with attached documents, and at the same time the production costs can be kept low . The 2-component layer also enables it to be as thin as possible, preferably less than 1.0 to 1.5 mm, so that a long service life is achieved, since the soft rubber layer cannot be permanently deformed due to the tension of the belt and the tension therefore does not decrease can.

However, an embodiment in which the adjusting wheel and the driver are designed in one piece is also advantageous. It is thereby achieved that the costs for assembling the transport system are reduced since the expenditure of time has been reduced. This also eliminates sources of error, such as loosening the driver from the adjustment wheel, so that safe operation is made possible.

A design is advantageous in which the 2k components of the driver and the bridge are connected to one another in a serrated or gear-shaped manner with notches in the contact area, with areas with a small material thickness or thickness preferably less than 1.5 mm, in particular 0.5 mm having. This ensures that due to the large transition area, the two 2-component components are held securely to one another and at the same time an area is created that is very thin, i.e. very small in thickness, so that the soft material in this area cannot be deformed. The thickness at the thinnest point of the outer component made of soft material is preferably less than 1 mm, preferably 0.5 mm, so that no deformations can occur over the tensioned band. This design also makes production as a 2-component component much easier, since there are areas in which there are thicker cross sections into which the soft material is injected, so that simpler production is possible.

An embodiment in which the driver and the bridge have a smooth surface is advantageous. It is thereby achieved that the assembly of the band is simplified, since it only has to be pushed onto the driver and the bridge, whereas the band has to be used accordingly in the case of projections or depressions. With such configurations of special surfaces, there is also a significant disadvantage that the component tolerances must be as small as possible so that the tape can be used correctly, which is not necessary with a smooth surface according to the invention made of soft material. Furthermore, a very good and high frictional connection between the belt and driver is achieved by a large contact surface, so that a very good and safe transport is guaranteed. A surface can thus be used on the bridge on which the belt slides particularly well, so that the required adjustment force is reduced.

However, an embodiment in which the outer component of the driver is made of a soft, preferably elastic material with high friction properties is also advantageous. This ensures that the strap is prevented from slipping when the adjustment wheel is turned with a high degree of probability. At the same time, the materials between driver and belt can be matched to one another so that the best possible friction properties are achieved.

However, an embodiment is also advantageous in which the bridge is also formed from a 2-component injection-molded component, the outer layer or the outer component once again having a small thickness, preferably less than 1.5 mm. As a result, the frictional connection is reduced, for example in the area of the bridge, in order to achieve low resistance for the belt when turning the drive wheel. In the case of the bridge, it is advantageous that the friction properties are as low as possible, in order to create the lowest possible resistance to movement for the strip, so that it can slide over the bridge with as little resistance as possible, whereas high friction properties are advantageous on the driver for safe transport of the strip are.

An embodiment is advantageous in which the bridge is formed by a surface with low friction properties and high sliding properties. This ensures that there is as little frictional resistance as possible when the belt is transported over the bridge is, so that the user-friendliness is increased when adjusting the transport system, since the adjusting force is reduced.

In one embodiment, it is advantageous that the belt drive, in particular the adjustment wheel, is fastened to a component, in particular to a text plate carrier of the impression unit or basic elements, via an axle or extensions formed on the adjustment wheel. This achieves that a simple structure can be provided, so that the manufacturing cost can be reduced. At the same time, such a drive unit or belt drive can be used in any stamp.

However, an embodiment in which several tape drives are arranged in parallel next to one another, preferably to form a datum, is also advantageous. This ensures that several setting options are available. In particular, the belt drives are simply plugged onto the axis next to each other and preferably form the MB unit (assembled belt set) with a common bridge. Belts of different widths are used for the day, month and year, with the carriers always being matched to the belt width. Preferably, the driver is minimally wider than a band is wide, so that a small gap is formed to the adjoining adjustment wheel or base element and thus the band does not rub on the adjustment wheel or base element.

However, it is also advantageous that one or more belt drives of a drive unit, in particular the driver, are designed for the different belts with diameters of different sizes. As a result, a larger diameter of the driver is preferably used for narrower straps, which increases the tension for this strap with the same strap length and thus requires the same adjusting force as for wide straps, which have a higher adjusting force due to the higher friction . It can therefore be said that due to the different large diameters of the carriers of a drive unit, the adjusting force is coordinated via the size of the diameter in relation to the width of the belt, so that the same adjusting force is preferably required for each belt.

Furthermore, the object of the invention is achieved by a belt drive in which at least the carrier of the belt drive is formed from two different materials, in particular from a 2-component injection-molded component, with the outer component lying on the conveyor belt having areas that are thin, preferably of less than 1.5mm.

The object of the invention is also achieved by a driver alone, in which the driver is formed from two different materials, in particular from a 2-component injection-molded component, with the outer component possibly resting on a belt having areas that have a small thickness, preferably of less than 1.5mm, in particular 0.4 to 0.8mm.

According to the invention, the object of the invention is achieved by the spare parts or individual parts of the driver, which are set out as independent claims.

However, the object of the invention is also achieved by a stamp in which the MB unit has a belt drive, comprising at least one adjustment wheel with a driver and a so-called bridge, with a belt being fastened over the driver and around the bridge, with actuation of the adjusting wheel, the belt can be adjusted via the driver, and that at least the driver of the belt drive is made of two different materials, in particular a 2-component injection-molded component, with the outer component lying on the belt having areas that are thin, preferably smaller 1.5 mm, in particular 0.4 to 0.8 mm, is arranged. It is also advantageous here that the very thin design of the soft layer, i.e. the outer component of the 2k driver, ensures that no deformation can occur, but that the high friction properties for safe onward transport of a belt are present. Due to the possibility of 2k production, an optimal adaptation of the materials to one another can be possible, ie the drive wheel, in particular the driver, is produced with an outer component that has a very high frictional connection with the material of the belt, so that slipping during rotation is prevented.

Finally, an embodiment is advantageous in which the bridge in the MB unit is formed from two different materials, in particular from a 2-component injection-molded component, with the outer component possibly resting on a band having a small thickness preferably less than 1.5 mm, in particular 0.4 to 0.8 mm. This makes it possible for the properties to be optimally adapted due to the 2-component construction, ie the bridge requires good sliding properties and the lowest possible friction properties for the strip, so that a 2-component component with high sliding properties is produced.

It is pointed out that the advantages can be combined with each other, so that not all advantages are always listed in order to avoid frequent repetition.

The invention is then described in the form of exemplary embodiments, it being pointed out that the invention is not limited to the exemplary embodiments or solutions shown and described.

Fig.1

eine schaubildliche Darstellung eines Stempel, insbesondere eines Stativstempels, in einer Ruhestellung; in vereinfachter, schematischer Darstellung;

Fig.2

eine schaubildliche Darstellung des Stempel nach Fig. 1 in einer Druck- bzw. Stempelstellung; in vereinfachter, schematischer Darstellung;

Fig.3

eine schaubildliche Darstellung einer Antriebseinheit/MB-Einheit für eine Abdruckeinheit eines Stempels, in vereinfachter, schematischer Darstellung;

Fig.4

eine Explosionsdarstellung der Antriebseinheit/MB-Einheit nach Fig. 3;

Fig.5

eine schaubildliche Darstellung eines Verstellrades mit einem Mitnehmer in 2k-Bauweise, in vereinfachte, schematischer Darstellung;

Fig.6

ein weiteres Ausführungsbeispiel eines Verstellrades mit einem Mitnehmer 2k-Bauweise, in vereinfachter, schematischer Darstellung;

Fig.7

eine schaubildliche Darstellung einer Brücke für die Antriebseinheit/MB-Einheit, in vereinfachter, schematischer Darstellung;

Fig.8

ein schaubildliche Darstellung einer Bandantriebes ohne Brücke, in vereinfachter, schematischer Darstellung;

Fig.9

eine Schnittdarstellung eines Bandantriebes nach Fig. 8.

Show it:

Fig.1

a diagrammatic representation of a stamp, in particular a tripod stamp, in a rest position; in a simplified, schematic representation;

Fig.2

a pictorial representation of the stamp 1 in a printing or stamping position; in a simplified, schematic representation;

Fig.3

a diagrammatic representation of a drive unit/MB unit for an impression unit of a stamp, in a simplified, schematic representation;

Fig.4

an exploded view of the drive unit/MB unit 3 ;

Fig.5

a diagrammatic representation of an adjustment wheel with a driver in 2k construction, in a simplified, schematic representation;

Fig.6

another embodiment of an adjusting wheel with a driver 2k design, in a simplified, schematic representation;

Fig.7

Figure 12 is a diagrammatic representation of a bridge for the drive unit/MB unit, in a simplified, schematic representation;

Fig.8

a diagrammatic representation of a tape drive without a bridge, in a simplified, schematic representation;

Fig.9

a sectional view of a tape drive 8 .

As an introduction, it should be noted that the same parts are provided with the same reference numbers or the same component designations in the different embodiments, the disclosures contained throughout the description can be applied to the same parts with the same reference numbers or the same component designations. The position information selected in the description, such as top, bottom, side, etc., also refers to the figure described and, if the position changes, must be transferred to the new position.

In the 1 and 2 an exemplary embodiment of a stamp 1, in particular a tripod stamp 1, is shown, which comprises at least one stamp component 2 and an impression unit 3.

The stamp component 2 consists at least of an upper part 4 with a grip element 5 and a lower part 6 with a cushion receiving element 7. The upper part 4 is preferably designed in the shape of a bow and has a longitudinal web 8 and two side elements 9,10, the side elements 9,10 in the lower part 6 are guided. The impression unit 3 is connected to the upper part 4 via a turning mechanism 11 in the lower part 6 in a movement-connected manner via an axis 12 or axle journal 12, so that the impression unit 3 in the lower part 6 can be moved from a rest position 13, according to FIG 1 , into a printing or stamping position 14, according to FIG 2 , By actuating the upper part 4, in particular by applying pressure to the grip element 5, can move.

Of course, a different design of a stamp 1 is also possible, in which the upper part 4 is designed like a cap and receives the lower part 6 in the interior during a stamping process, as is the case with plastic self-inking stamps, for example with the “Printy 4.0” from Trodat, as described in AT 507 833 A , the case is. In the rest position 12, a text plate 15 mounted on the imprint unit 3 rests against a stamp pad 16 soaked with stamp ink in the pad receiving element 7, with the imprint unit 3 with the text plate 15 moving over the turning mechanism 11 from the rest position 13 during a stamping process to produce a stamp imprint a rotational movement into the stamping position 14 can be adjusted or adjusted, ie the impression unit 3 is rotated via the axis 12, for which purpose the turning mechanism 11 is provided, in which the impression unit 3 is rotated via a predetermined link path 17. Such turning mechanisms 11 or rotary movements are already known in such self-inking stamps 1, so that they are not discussed in detail. Merely to point out that in the case of the stamp 1 according to the invention, a rigid link path 17 is shown, but also one movable link track (not shown) can be used. Of course, an equivalent construction of the components with a so-called center beam, as known from the prior art, would also be possible, ie the same or aliquot parts are used, but an additional center beam is used, in which a spring for the return is arranged in the rest position 13. In the stamp 1 shown, the spring (not shown) for resetting to the rest position 13 is arranged in the side bar 8 , 9 and the lower part 6 .

Such stamps 1 are usually equipped with an MB unit 18 (mounted band set unit 18), also known as a drive unit 18, which is integrated in the impression unit 3, as shown. In this case, the MB unit 18 corresponds to a text plate 15 glued to the imprint unit 3, it being possible, for example, for a date to be set via the MB unit 18. It goes without saying that the drive unit 18 can also be used without an additional text plate 15 .

In the Figures 3 to 9 shows the drive unit 18 or MB unit 18 according to the invention, with the drive unit 18 or MB unit 18 comprising at least one adjusting wheel 19 with a driver 20 and a bridge 21, with a belt 22 or Conveyor belt 22 is fastened and guided. Such a unit, consisting of adjusting wheel 19, driver 20, bridge 21 and belt 22, forms a belt drive 23, with several belt drives 23 preferably being arranged in parallel next to one another, i.e. four belt drives 23 are arranged to form a date, for example, with two Tape drives 23 for the day, a tape drive 23 for the month and another tape drive 23 for the year is present, so that the tapes 22 are provided with different negative symbols or letters.

How out 4 As can be seen from the MB unit 18 shown for a date, the drive unit 18 has two basic elements 24, 25 which are plugged together and thus form a basic body. On the basic elements 24, 25 there is an axle 26 on which the adjustment wheels 19 with the carriers 20 are fitted, and on the other hand a bridge 21 required for all adjustment wheels 19 and carriers 20, so that the belts 22 can be pulled from the carrier 20 via the bridge 21 are positioned. So that the adjusting wheel 19 and the driver 20 can be attached to the axle 26, the adjusting wheel 19 and the driver 20 have a corresponding corresponding opening 27 on. To protect against contamination, it is possible for a protective cap 28 to be fitted over the drive unit 18 .

In the Figures 5 and 6 the solution according to the invention is shown using two exemplary embodiments on a one-piece adjusting wheel 19 with the driver 20, i.e. the adjusting wheel 19 and the driver 20 form a single plastic part, although it is possible for the two parts to be two separate components that are mutually are fastened in such a way that when the adjusting wheel 19 is turned, the driver 20 is also turned. However, as shown, the adjustment wheel 19 and driver 20 assembly is preferably formed as a one-piece individual part.

It is essential here that at least the carrier 20 of the belt drive 23 is formed from two different materials, in particular from a 2-component injection-molded component 29, 30, with the outer component 30 resting on the belt 22 or conveyor belt 22 having areas (36), which has a small thickness 31, preferably less than 1.5 mm, in particular 0.4 to 0.8 mm. In the one-piece 2k assembly shown, consisting of the adjusting wheel 19, the driver 20, which is formed by the components 29,30, the adjusting wheel 19 and the component 29 are made of the same material, in particular ABS or PS or the like. formed, whereas the component 30 is formed from a soft material with high friction properties, in particular from thermoplastic elastomers such as TPE or TPV or also silicone or rubber or the like.

As already mentioned, it is essential that the thickness 31 of the component 30 is as thin/small as possible so that the component 30 is not deformed by the constant action of force from a tensioned belt 22, but the essential advantageous properties for a high frictional connection by a suitable special material, especially with soft properties such as rubber, can be used. It is thus possible for a surface 32 of the outer component 30 to be smooth or planar, ie for the driver 20 to have a smooth surface 32, with the outer component 30 of the driver 20 being formed from a soft, preferably elastic material with high friction properties is, so that the tension for the bands 22 can be kept low in order to achieve a comfortable adjustment force. A smooth surface 32 has the advantage that during assembly, that is to say when inserting the band 22, it is not necessary to ensure that the band 22 is correctly inserted, as is necessary with systems with grooves and projections. Another significant advantage lies in the manufacture, since this also makes it easy to produce the strip 22 with a smooth surface 33 .

As can also be seen, the adjusting wheel 19 has a jagged surface 34, so that a better hold is achieved when the adjusting wheel 19 is turned. Thus, the fingers can be prevented from slipping when the adjustment wheel 19 is rotated, and more force can be applied to the adjustment wheel 19 . It is of course possible here for other configurations of the surface 34, such as curved, rounded grooves, to be used. There would also be the possibility that the outer area of the adjusting wheel 19 is also formed by a 2-component component, since the driver is already produced by a 2-component construction.

A further development is in 6 visible, in which the 2k components 29, 30 is specially designed in the contact area 35, for which purpose, for example, the contact area 35 is designed in a jagged or gear-shaped manner or notches for connecting the two components 29,30. Areas 36 thus have small material thicknesses or thicknesses 31, preferably less than 1.5 mm, in particular 0.5 mm, which ensures that no deformations occur on the outer component 30 as a result of the action of the tension force of the band 22. Such a configuration of the contact area 35 creates a significantly larger surface area between the two components 29, 30, so that a very good connection between the two components 29, 30 is achieved. At the same time, however, it is achieved that special areas 36 are provided which have a thin thickness 31, so that deformation of the outer component 30 is prevented.

It is also possible that an insert 36 with good sliding properties can be arranged in the component 29 in the area of the opening 27 for mounting on the axle 26, as is shown in 6 is shown. This insert 36 can also be used in other exemplary embodiments, in particular in figure 5 , be used.

In 7 the bridge 21 is also shown in 2k construction, ie two components 37,38, ie the bridge 21 is also formed from a 2k injection-molded component, the outer layer or component 38 again having a small thickness 39, preferably smaller 1.5mm. This can now, in contrast to the driver 20, in which a covering with high friction properties for a good non-positive transport of Band 22 is used, a covering or a material for the outer component 38 can be used, which has a high sliding property and low frictional adhesion, so that the band 22 can slide well over the outer, preferably smooth surface 40 of the bridge 21.

It is thus possible for the driver 20 and the bridge 21 to be produced as a 2k component from different material combinations in a belt drive 23, it also being possible for only one part, ie the driver 20, to be designed as a 2k component. It is essential that the thickness 31 and 39 of the outer components 30, 38 is as thin as possible, so that a deformation of the outer components 30 and 38 by the belt tension of the belt 22 is not possible. If, as is known in the prior art, the outer additional straps are used that are too thick, the outer additional straps would be deformed over a longer period of time due to the continuous load on the strap 22, so that the strap tension decreases and the strap 22 slips when the adjustment wheel 19 is turned. Due to this problem, the system known from the prior art has not established itself on the market, so that production or use in the stamp has been discontinued.

Next is in the Figures 8 and 9 shown an embodiment in which different sized belt drives 23 are used for the different belts 22, ie that one or more belt drives 23 of a drive unit 18, in particular the driver 20, are formed for the different belts 22 with different sized diameters 41,42. The bands 22 for the various carriers 20 preferably have the same length, so that the bands 22 are tensioned differently due to the different diameters 41,42. The diameter 41 for a daily band 43 is preferably larger than for a monthly or annual band 44, so that due to the higher tensioning force of the daily band 43, the lower frictional forces in this band 22 are compensated for and thus all band drives 23 of a drive unit 18 require approximately the same adjusting force . It is essential here that a flat or straight impression surface 45 is produced in the area of the bridge 22 (not shown), so that a high impression quality is achieved during the stamping process.

This solution of the different diameters 41,42 of the drivers 20 for adjusting the adjusting force of a belt drive 23 can be used independently of the 2k design, i.e. this solution can be used with known adjusting wheels with drivers 20 without 2k construction, as well as the new inventive solution with 2k construction can be used.

It is pointed out that, of course, a separate bridge 21 can be arranged for each belt drive 23 .

Finally, for the sake of clarity, it should be pointed out that some of the drawings are shown not to scale and/or enlarged and/or reduced in size for better understanding.

Claims (14)

1. Drive unit (18), in particular ABU (18), preferably for a band gear (23) in a stamping insert (3) of a stamp (1), comprising at least an adjustment wheel (19) with a driver (20) and a so-called bridge (21), wherein a band (22) is fastened over the driver (20) and around the bridge (21) so that, when the adjustment wheel (19) is actuated, the band (22) can be shifted via the driver (20), characterised in that at least the driver (20) of the band gear (23) is formed from two different materials, in particular from a 2C injection-moulded component (29,30), wherein the outer component (30) butting against the band (22) or conveyor band (22), respectively, has areas (36) having a low thickness (31) preferably of less than 1.5 mm, in particular 0.4 to 0.8 mm.
2. Drive unit (18) according to Claim 1, characterised in that the adjustment wheel (19) and the driver (20) are designed as a single part.
3. Drive unit (18) according to Claim 1 or 2, characterised in that the 2C components (30 and 38) of the driver (20) and of the bridge (21) are connected to one another in the mutual contact region (35) in a serrated or gear-shaped manner with notches, wherein it comprises area (36) having a low material thickness or thickness (31,39), respectively, preferably below 1.5 mm, in particular 0.5 mm.
4. Drive unit (18) according to one or more of the preceding claims, characterised in that the driver (20) and the bridge (21) have a smooth surface (32,40).
5. Drive unit (18) according to one or more of the preceding claims, characterised in that the outer component (30) of the driver (20) is formed from a soft, preferably elastic material with high frictional properties.
6. Drive unit (18) according to one or more of the preceding claims, characterised in that the bridge (21) is also formed of a 2C injection-moulded component, wherein in turn the outer layer or outer component, respectively, (38) has a low thickness preferably of less than 1.5 mm.
7. Drive unit (18) according to one or more of the preceding claims, characterised in that the bridge (21) is formed with a surface having low frictional properties and high gliding properties.
8. Drive unit (18) according to one or more of the preceding claims, characterised in that the band gear (23), in particular the adjustment wheel (19), is fastened to a component, in particular to a text plate carrier of the stamping insert (3) or basic elements (24,25), via an axle (26) or extensions formed on the adjustment wheel.
9. Drive unit (18) according to one or more of the preceding claims, characterised in that a plurality of band gears (23) are provided in parallel side by side, preferably to form a date.
10. Drive unit (18) according to one or more of the preceding claims, characterised in that one or more band gears (23) of a drive unit (18), in particular the driver (20), are formed for differing bands (22) with different diameters (41,42).
11. Band drive (23) for a drive unit, comprising an adjustment wheel (19), a driver (20) and a bridge (21), characterised in that at least the driver (20) of the band gear (23) is formed from two different materials, in particular from a 2C injection-moulded component (29,30), wherein the outer component (30) butting against the conveyor band has areas (36) having a low thickness (31) of less than 1.5 mm.
12. Driver (20) for a band gear (23) for use in a drive unit (3), characterised in that the driver (20) is formed from two different materials, in particular from a 2C injection-moulded component (29,30), wherein the outer component (30), which may butt against a band (22), has areas (36) having a low thickness (31) of less than 1.5 mm, in particular 0.4 to 0.8 mm.
13. Stamp (1), comprising at least a stamping component (2) and an impression unit (3) with an ABU (18), wherein the stamping component (2) is formed from a top part (4) and a bottom part (6) with a pad-receiving element (7), wherein the stamping insert (3) is connected so as to move synchronously to the top part (4) via a reversing mechanism (11) in the bottom part (6), wherein in the resting position (13) an ABU (18) mounted on the stamping insert (3) and, if appropriate, a text plate (15) butts or butt against an ink cartridge (16) soaked with stamp ink in the pad-receiving element (7), and wherein during a stamping operation for producing a stamp impression the stamping insert (3) can be moved via the inverting mechanism (11) into a stamping position (14), characterised in that in the ABU (18) a band gear (23) comprising at least an adjustment wheel (19) with a driver (20) and a so-called bridge (21) is provided, wherein a band (22) is fastened via the driver (20) and around the bridge (21), wherein the band (22) can be shifted via the driver (20) when the adjustment wheel (19) is actuated, and in that at least the driver (20) of the band gear (23) is formed from two different materials, in particular from a 2C injection-moulded component (29,30), wherein the outer component (30) which butts against the band (22) has areas (36) having a low thickness (31) preferably of less than 1.5 mm, in particular 0.4 to 0.8 mm.
14. Stamp (1) according to Claim 14, characterised in that in the ABU (18) the bridge (21) is formed from two different materials, in particular from a 2C injection-moulded component (37,38), wherein the outer component (38), which may butt against a band (22), has a low thickness (39) preferably of less than 1.5 mm, in particular 0.4 to 0.8 mm.

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