EP3007869B1 - Cutter for strip-shaped materials of all kinds, and material web cut thereby - Google Patents

Description

The subject of the invention is a cutter for strip-shaped materials of all kinds according to the preamble of patent claim 1.

It is known from the prior art to cut through a strip-shaped material with the aid of a cutter. Such a cutter preferably comprises either a guillotine knife or a swivel knife.

In recent times, however, more and more devices have been used which, although they carry out a cutting process, exclude a narrow web from the cutting process. The two sides to be separated are still slightly connected to one another by the remaining web. This is referred to as a partial cut, since the strip-shaped material is not completely cut through.

The main advantage of a partial cut is that the part to be cut off remains connected to the continuous material and thus cannot fall out of a dispenser device, for example.

Such a partial cut has hitherto been carried out with devices which have a shearing blade arranged in a V-like manner. A notch is arranged in the apex of the V-arrangement, through which the required web is formed. With these devices, the partial cut is always carried out simultaneously by the two shearing blades, which means that the cut is made both from the left and from the right side and only in the central area of the material does a cut-free web remain unaffected by the cutting process.

The trend is increasingly towards individual packages that are strung together on an endless, tubular material. The individual packages can contain products such as B. medicines, tablets or include chewing gum or the like. It is desirable that only one packaging and its contents is available. Cutters are required for this, which separate the endless material with a partial cut down to a web.

In a preferred embodiment, the individual section or the individual packaging has a lateral incision, which is referred to below as a cut. Such a cut serves as an aid to easy tearing open of the individual package.

Such side cuts are known, for example, in packaging for gummy bears or toys, with a small cut starting from a continuous side surface only in a small area, which allows the user to easily tear open the entire packaging.

It is true that it is known from the prior art to separate an endless material into certain partial areas. It is also known that a cut occurs in the partial area. However, the two cuts must be carried out one after the other or with two different devices.

Furthermore, the devices according to the prior art have the disadvantage that the height of the endless material is limited by the V-like arrangement of the blade. Parcels with a higher packaging content cannot be cut because the V-shaped arrangement of the shearing blade does not allow this.

the EP 0 985 542 A1 discloses a cutter for strip or band-shaped materials of all kinds with the features of the preamble of claim 1.

A cutting device of a similar type is also in the U.S. 2007/107575 A1 disclosed.

A cutting device of a similar type is also in the U.S. 2007/107575 A1 disclosed.

the EP 1 845 019 discloses a device for producing a film tube with a cutting device which can make cuts that are opposite one another or offset from one another.

The object of the invention is to provide a device that can carry out both the partial cut and the first cut, whereby materials with a larger packaging content can also be cut. The passage height should be increased compared to the usual devices. the EP 1 845 019 discloses a device for producing a film tube with a cutting device which can make cuts that are opposite one another or offset from one another.

The object of the invention is to provide a device that can carry out both the partial cut and the first cut, whereby materials with a larger packaging content can also be cut. The passage height should be increased compared to the usual devices.

The invention is characterized by the technical teaching of patent claim 1 in order to solve the task at hand.

The device has only a single electric motor drive, by which two different shearing blades are driven.

In a preferred embodiment, the electromotive drive consists of an electric motor, which carries a pinion on its drive shaft, which meshes with a toothed drive wheel and drives it in rotation.

This results in the advantage that only one motor is required to carry out both a partial cut and a first cut on an endless material.

In a first advantageous embodiment, the motor is designed as a DC motor. Of course, other motor types are also possible.

The motor is non-positively connected to a gear on which a driver is arranged. The driver is designed in such a way that it engages in at least one contour of a shaving blade and thus converts a rotary movement into a linear movement.

It is crucial that the contours serve as link guides for the driver. In the following, therefore, the contour is understood to mean a link guide or link control. Such link guides are used in particular to implement complex transfer functions.

The connecting link preferably has a slot, web or groove in/on which the driver is positively guided on both sides. The transmission function of the link guide is determined exclusively by the course of the slot, web or groove and can be freely selected within wide limits.

The shape of the contour can be a horizontal slit, for example. Of course, the contour can also have any other shape, such as a slot inclined by 30° with respect to the horizontal central axis.

Furthermore, the contour can be designed in such a way that the driver does not perform any transfer function to the shearing blade. In this case, the driver is pivoted downwards by a rotary movement of the gear wheel, e.g. 180°, but there is no contact with the blade contour. The blade contour has a larger free recess, which is referred to below as the freewheel.

In a first embodiment, the first shearing blade has an almost horizontal, slit-like contour. The power transmission from the driver the contour of the first blade is direct. In its rest position, the first shearing blade is spaced farthest from the opposing knife.

Due to the rotary movement of the motor in a first direction, for example to the left, the carrier rotates and moves the first shearing blade downwards. The cutting process is carried out by the shearing blade gliding closely past the opposite knife. Due to the width of the shearing blade and the arrangement relative to the material to be cut, only a lateral cut of the material takes place in this embodiment. This means that the material only has a short incision in the lateral edge area.

The second shearing blade is designed, for example, as a pivoting shearing blade, which is mounted on one side around a pivot point. The contour of the second shearing blade is designed in such a way that when the motor rotates to the left as mentioned above, the driver moves within a freewheel or a freewheel surface. There is therefore no power transmission from the driver to the second shearing blade.

After the first shaving blade has reached the end position, the motor rotates in the opposite direction (e.g. to the right), causing the shaving blade to be moved back up to the zero or rest position via the driver.

With a further turning movement in the opposite direction (e.g. to the right), the driver grips next to the contour of the first blade, at the same time also in a contour of a second blade.

If the motor continues to rotate in one direction, for example to the right, the second shearing blade is moved downwards due to the contour or the predetermined backdrop. The second blade swings down and glides past the horizontal knife. In a preferred embodiment, the horizontal knife serves both as a counter-knife for the first and for the second shearing blade.

The second shearing blade is pivoted in the direction of the horizontal knife until it has reached an end position. The end position means that the respective shearing blade has slid past the counter-knife and the cutting process has taken place in any case.

The second shearing blade is designed or arranged opposite the counter-knife in such a way that no cutting process takes place in a small sub-area. This sub-area is referred to below as the cut-free zone.

Accordingly, the continuous material is largely cut through by the second shearing blade, but no cutting process takes place in a small sub-area. Consequently, only a partial cut takes place. In the area of the cut-free zone, there is still a connection between the partial section to be separated and the remaining endless material.

The cut-free zone is so large that the remaining web can easily be separated from the rest of the endless material by tearing. Thus, a section can be separated from the continuous material at a later point in time.

Due to the different design of the two shearing blades, it is possible for the first time to move a first shearing blade in a vertical direction downwards and at the same time pivot a second shearing blade. The first shearing blade makes a lateral cut on the endless material, while the second shearing blade makes a partial cut on the same section of the endless material.

In a further advantageous embodiment, the first shearing blade also has a curve control with a freewheel. If the second shearing blade is now moved downwards in a specific direction of rotation, the first shearing blade remains in its resting position due to the lack of force transmission due to the free-running surface.

If the motor now reverses its direction of rotation, both the first shearing blade and the second shearing blade can be moved or pivoted downwards due to the gate controls. It is now possible for the first time to drive two shearing blades with just one motor, which can be controlled independently of one another.

The first shearing blade can be designed, for example, as a guillotine blade and can be made of steel, such as hardened steel.

The second shaving blade is designed as a pivoting blade, with the shaving blade being able to pivot downwards starting from a pivot bearing and thus being able to make a cut against a counter-blade.

In an advantageous embodiment, the two shearing blades mentioned above cut against a horizontal knife. As a result, it is now possible for the first time to carry out several cuts, such as first cuts or partial cuts, on a partial area of an endless material almost simultaneously. An endless tube, for example, can be cut through as the endless material, but a label, a foil material or a paper material is also possible. A ticket, receipt paper, laminated materials or a variety of plastic materials can also be cut through. The decisive factor in the device is that the arrangement of the two shearing blades and the use of cam controls mean that the two shearing blades can be moved to a relatively distant (rest) position in relation to the (counter) knife. This creates a large passage height for the endless material to be cut.

If the endless material is designed, for example, as a film tube that is welded on one side, with the film tube having individual chambers in which objects such as tablets are arranged, this creates a certain material height. This height of material should be less than the passage height of the cutting device.

This was not known from the prior art, since the known devices only provided a narrow passage, as a result of which only relatively flat, strip-shaped products could be cut off.

In a first essential exemplary embodiment, a tubular medium is present, with a strip in the form of 5 mm being present in a right-hand area. This strip is formed by a welding process of the tubular material and is - due to this welding process - designed particularly hard (inelastic) compared to the rest of the material. With the device, it is now possible to make a cut in this area with a defined width, since the cut is made by a shearing blade that is designed differently than the shearing blade for the partial cut.

In the following, the invention is explained in more detail with reference to drawings showing only one embodiment. Further features and advantages of the invention that are essential to the invention emerge from the drawings and their description.

The subject matter of the present invention results not only from the subject matter of the individual patent claims, but also from the combination of the individual patent claims with one another.

Figur 1:

zeigt den Abschneider in einer Ruheposition

Figur 1a:

Schnitt gem. der Linie E-E in Figur 1

Figur 1b:

Schnitt gem. der Linie D-D in Figur 1

Figur 2:

zeigt den Abschneider, wobei das Scherblatt 4 in der Arbeitsposition nach unten verfahren ist.

Figur 2a:

Schnitt gem. der Linie E-E in Figur 2

Figur 2b:

Schnitt gem. der Linie D-D in Figur 2

Figur 3:

zeigt den Abschneider mit beiden Scherblättern 4 und 5 in der Arbeitsposition.

Figur 4:

zeigt das Scherblatt 5 in der Draufsicht

Figur 5:

zeigt die Kurvensteuerung des Scherblattes 5 in der Ruheposition

Figur 6:

zeigt die Kurvensteuerung des Scherblattes 5 in der Arbeitsposition

Figur 7:

zeigt das Scherblatt 5 in der Arbeitsposition

Figur 8:

zeigt das Scherblatt 4 in Draufsicht mit einer ersten Kontur

Figur 9:

zeigt eine besondere Kurvensteuerung bzw. eine zweite Kontur des Scherblattes 4

Figur 10:

zeigt den Schnitt durch eine Papierbahn

Show it:

Figure 1:

shows the cutter in a rest position

Figure 1a:

Section according to line EE in figure 1

Figure 1b:

Cut according to line DD in figure 1

Figure 2:

shows the cutter with the shearing blade 4 moved downwards in the working position.

Figure 2a:

Section according to line EE in figure 2

Figure 2b:

Cut according to line DD in figure 2

Figure 3:

shows the cutter with both blades 4 and 5 in the working position.

Figure 4:

shows the shearing blade 5 in plan view

Figure 5:

shows the curve control of the blade 5 in the rest position

Figure 6:

shows the curve control of the blade 5 in the working position

Figure 7:

shows the blade 5 in the working position

Figure 8:

shows the shearing blade 4 in plan view with a first contour

Figure 9:

shows a special curve control or a second contour of the blade 4

Figure 10:

shows the cut through a paper web

In the figure 1 the cutter 1 is shown in the rest position of both shearing blades 4 and 5.

the Figures 1a and 1b show the same parts of each figure 1 in section along lines DD and EE.

The cutter 1 has a base plate 2 on which both a motor 3 and a first shearing blade 4 and a second shearing blade 5 are arranged. Both blades 4, 5 run against a knife 6, which is arranged horizontally fixed on the base plate 2 in the lower area. The knife 6 has two different areas, with the shearing blade 5 being pivoted towards a first area, while the shearing blade 4 is vertically displaced towards a second area. Accordingly, the shearing blade 5 is in the form of a pivoting blade, while the shearing blade 4 is in the form of a vertically movable falling blade.

A step 7 is formed between the first and second area on the knife 6 , which also serves to ensure that the shearing blade 4 does not lift the shearing blade 5 off the knife 6 .

Thus, the first blade 5 cuts against a first cutting area 31 of the knife 6, while the second blade 4 cuts against a second cutting area 32 of the knife 6.

As already explained above, the motor 3 can be arranged not only on the base plate 2, but also in an opposite one Be arranged housing and be connected via a mechanical drive to the base plate and the shear blades 4, 5 arranged there.

The drive can be arranged in a housing and a connection to the two shearing blades 4, 5 can be established via a driver.

The blade 6 is connected to the base plate 2 both at a first attachment point 8 and at a second attachment point 9 . In an advantageous exemplary embodiment, the second attachment point 9 can be designed in such a way that it serves as a guide point for the first shaving blade 4 when it is pivoted down vertically in the direction of the arrow 34 .

The shearing blade 5 is arranged on the base plate in such a way that it can be pivoted downwards and upwards in the direction of the arrow 33 as a one-armed lever mounted on one side about a pivot bearing 10 .

A passage 11 is formed between the knife 6 and the shearing blades 4 and 5 in the rest position, which passage can be so large that a tubular medium with a content can be passed through the passage without it being in the rest position from the base frame 2 or others components is hindered.

For example, in a first embodiment, the passage 11 can be formed with a wide height ratio of 70:10. Of course, other length, width and height ratios are also possible with the embodiment that is essential to the invention. The passage 11 is formed at its upper, horizontal edge by the horizontally running lower edge of the shearing blade 5, while the left vertical boundary is formed by a vertical edge of the shearing blade 4 and the right vertical edge by a right vertical projection on the outer pivotable part of the shearing blade 5 is formed. The lower edge of the passage 11 is formed by the horizontal upper edge of the counter knife (knife 6).

The size of the passage 11 is accordingly essentially formed by the horizontal lower edge of the shearing blade 5 designed as a swivel blade. Because this blade 5 has a large pivoting angle of about 40 degrees (see figure 4 ) can be pivoted, the size of the passage 11 results from this large pivoting angle.

What is decisive in this embodiment is that in the rest position no shearing blade 4, 5 obstructs the passage 11 and thus the endless medium or endless material can be pulled freely through the large-sized passage 11.

This was previously not possible according to the prior art, since in the case of a partial cut, at least one shearing blade usually made a uniform cut from below or from above, and the overall height of the passage 11 was therefore limited.

Starting from the motor 3, the drive power for the two shearing blades 4, 5 is transmitted to a toothed drive wheel 12, on which - a driver 13 is attached - eccentrically to its axis of rotation. In a preferred embodiment, the driver 13 can be designed as a pin which engages in a first contour 14 of the first shearing blade 4 . The first contour 14 is arranged horizontally in the upper area of the shaving blade 4 and is designed in such a way that the pin-like driver 13 engages in the contour 14 and thus controls the displacement of the shaving blade 4 . This is in the Figures 1 to 4 and 9 and 10 shown.

The contour 14 serves as a guide contour to enable power to be transmitted in the vertical direction of the arrow 34 from the driver 13 or from the drive wheel 12 to the first shearing blade 4 . The first contour 14 is designed in such a way that it converts a linear movement from a circular movement of the drive wheel 12 in the direction of arrow 34 forms. The blade 4 is therefore designed as a gravity knife.

According to the invention, the driver pin 13 of the drive wheel 12 also engages in the contour 15 of the second blade 5 at the same time. The first contour 14 for the vertical, oscillating drive of the first shearing blade 4 is designed as a guide slot in the upper part of the shearing blade 4 which is inclined approximately obliquely to the horizontal.

The second guide slot is approximately C-shaped as a contour 15 and extends over an angle of rotation of approximately 180 degrees on the circumference of the drive wheel, eccentrically to its axis of rotation.

The driver 13, which is fixed and eccentrically arranged on the drive wheel 12, thus engages in the attachment of this shearing blade 5, which is arranged on the pivotable part of the shearing blade 5, in the region of which the crescent-shaped or C-shaped contour 15 is arranged. The shearing blade 5 is thus pivoted about the pivot bearing 10 in the directions of the arrow 33 as a pivoted lever which is pivotably mounted on one side in the pivot bearing 10 .

It is now possible for the first time, starting from a single motor 3 with a single drive wheel 12 and only one driver 13, to drive two different shearing blades 4, 5 in an oscillating manner and thus to carry out two different cuts simultaneously and synchronously.

The term "simultaneously" means that two different cuts can be made with just one device, whereby there can also be a time offset at the same time, which results from the mutual offset of the contours 14, 15 of the two shearing blades 4, 5.

The special design of the contours 14, 15 will be discussed in more detail in a later figure example.

In an advantageous embodiment, a limit switch 16 is arranged in the lower area of the drive wheel 12, which determines the end position of the driver or the shearing blade and thus stops the motor.

Of course, a rest position switch can be arranged in the upper or opposite area, which determines whether the two shearing blades 4, 5 are in the open state and thus the passage 11 is fully released.

A further advantage of the invention is that due to the attachment points 8 and 9, the blade 6 can be exchanged at any time and can be replaced with a new or ground blade.

With the figure 2 the cutter is shown with the shear blade 4 in the lower working position. the Figures 2a and 2b show the respective sections in figure 2 after lines DD and EE.

The invention understands the term "lower working position" to mean the position that has been reached after cutting through the material. Starting from the upper position of the driver 13 on the drive wheel 12 takes place in the embodiment figure 2 a rotation in the direction of the arrow 17, thus a linear movement of the shearing blade 4 is made possible starting from a rotary movement. The driver 13 rotates downwards in the direction of the arrow 17 and thus moves the shearing blade 4 downwards in the vertical direction 34 , as a result of which the cutting surface of the shearing blade 4 is moved along the knife 6 .

In particular, the shearing blade 4 is moved with its shearing edge along a special area of the blade 6, namely the area 32, and thus only a small incision (cut 37 in figure 10 ) is generated in the tubular medium in order to enable later tearing open, for example of a bag. Decisive in the embodiment according to Figure 2, 2a, 2b is that only the shearing blade 4 has been moved downwards, with the shearing blade 5 still remaining in its rest position.

The invention understands the resting position to mean that the shearing blade 5 stops in the upper area and thus completely releases the passage 11 .

In summary, it can be said that the figure 2 1 only shows a movement of the shaving blade 4, with the shaving blade 5 remaining in its rest position. The position of the shearing blade 4 is achieved in that the drive wheel rotates together with the driver 13 in the direction of the arrow 17 .

In the figure 3 the rotation of the drive wheel 12 in the direction of the arrow 18 is shown. Starting from the rest position of the two shaving blades 4, 5, the driver 13, which is arranged on the drive wheel 12, is rotated to the right in the direction of the arrow 18 and thus transmits its rotational movement to the contour 14 of the shaving blade 4 and the contour 15 of the shaving blade 5 the different formations of the contours 14, 15, the two shearing blades 4, 5 are moved either simultaneously or in chronological order, whereby both the tubular material is cut down to a cut-free area and at the same time a cut is made in the material.

It is important that the rotational movement of the drive wheel 12 and the driver 13 drives both a shearing blade 5 designed as a pivoting blade about a pivot point 10 and a guillotine-like shearing blade 4, which enables a cutting movement in the vertical direction.

Starting from the rest position, the shaving blade 4 is now moved vertically downwards into a working position or end position. Crucial to this travel is that the blade 4 has a guide bar 19 in the lower area, which is guided along the attachment point 9 and thus a guided movement takes place on the base frame 2 or within the housing of the cutter. The fastening point 9 thus prevents the shearing blade 4 from deflecting to the side, particularly in the area of the guide bar 19.

Essential in the embodiment according to figure 3 is now that both the shaving blade 5 and the shaving blade 4 have been moved downwards in the direction of arrow 18 by a rotary movement of the drive wheel 12 and thus, in addition to a cut (section 37 in figure 10 ) also at the same time a partial cut (cut 36 in figure 10 ) is done. The invention understands a partial cut to mean that the continuous medium, apart from a small web area (web 38 in figure 10 ) is cut off, with this web area being designed so small that a later user can separate the two sections from one another without major problems and thus obtain a single section from the endless medium. The web area 38 can have a size in the range of 1 to 5 mm, for example.

Due to the remaining of the web area 38, it is now possible to separate a sub-area from the endless medium, with the sub-area remaining on the endless medium until it is finally "torn off".

If a cutting process is to be carried out with the cutter, with both a cut in the side area and a partial cut in the entire area, a packet remains connected to the rest of the endless medium (material web 35 in figure 10 ) tied together. It is important that after cutting, the shearing blades 4, 5 either remain in the lower working position, which has the advantage that the passage 11 is closed and no further endless material can be pulled through the passage.

In a further advantageous embodiment, both shearing blades 4, 5, both shearing blade 4 and shearing blade 5, can be moved back into the rest position, as a result of which passage 11 is released again.

There are now different examples of use, in a first example of use, for example, a packet—already separated except for the web area 38—is always available and the user only has to tear it off the cutter or from the endless material.

In a further embodiment, it is possible for the user to interact with the device, for example by pressing a button, which then causes the two shaving blades 4, 5 to be cut and the user receives a packet that has been severed down to the web area 38 .

Of course, the invention is not limited to the separation of a packet, because any other endless materials such. As paper and labels or the like are separated.

In figure 4 the blade 5 is shown. The shearing blade 5 is designed in such a way that it has a bore or passage in the left area, which is provided for the pivot bearing 10 . This means that the shearing blade 5 is in the form of a pivoting blade and a rotary movement about the pivot point 10 therefore takes place. In the right-hand area of the shaving blade 5 there is a web 22 which extends vertically downward and is designed as a guide web. The guide bar 22 is designed in such a way that it only extends vertically downwards over a narrow area, but at a distance from the rest of the shearing blade 5 , and thus brings the shearing blade 5 to rest on the knife 6 . The entire passage 11 is thus released through the narrow web-like guide bar 22, since the shearing blade 5 only rests on the knife 6 in the area of the web 22 and thus releases the passage 11 .

What is decisive for the cutting blade 5 is that a cutting edge 21 is formed in the lower area, which runs horizontally and interacts with the blade 6 .

In figure 5 the contour 15 of the blade 5 is shown. The driver 13 is shown in its rest position, which is in the upper area of the surface 23. Would now according to figure 3 turn the driver in the direction of arrow 17 to the left, he would be within the freewheel of the contour 15. If the driver rotates in the direction of arrow 18 according to figure 3 to the right, the driver 13 moves in the contour 15 of the surface 23 and exerts a movement on the shaving blade 5 .

This move is in figure 6 shown. figure 6 12 shows a downward rotary movement in the direction of the arrow 25 , starting from the rest position, the driver 13 runs along the surface 23 and reaches its working position 24 . This working position is the end position, in which case an average or a partial cut of the tubular or endless material has already taken place.

Based on figure 6 it can also be clearly shown that with a further rotational movement in the direction of arrow 26 the driver 13 is moved back into its rest position and thus a force is transmitted to the contour 15 and the shearing blade 5 is moved back into its starting position. The starting position is understood to be the rest position in which the passage 11 is freely accessible.

Is based on the figure 6 If the driver 13 is moved in the opposite direction to the direction of the arrow 26, it moves into the free-running surface 27 in the direction of the arrow 26 and there is therefore no transmission of force to the shearing blade 5.

It is crucial that, starting from the rest position, the driver 13 is moved counter to the direction of the arrow 26 into the free-running surface 27 and thus no power transmission to the shearing blade 5 takes place. Another essential feature of the freewheel surface 27 is that a trailing surface 30 is arranged in the front tip area, which serves as a tolerance range for the engine control. The decisive factor is that in the working position 24 or in the end position of both shearing blades 4, 5 the endless material is cut off in such a way that only a cut-free zone 29 remains, whereby the two materials are completely separated simply by tearing.

In figure 7 the working position of the blade 5 is shown.

In figure 8 the shearing blade 4 is shown, the shearing blade 4 having a contour 14 in the upper area. The contour 14 is formed as an almost horizontal recess, and the driver 13 engages within the recess of the drive wheel 12 and thus a power transmission to the shearing blade 4 takes place. In particular, due to the special design of the contour 14, a conversion from a rotational movement to a vertically directed linear movement of the shearing blade 4 is possible.

In the lower area, the shaving blade 4 has the web 19, which serves to ensure that the shaving blade 4 can be moved along a fastening point on the base plate 2, such as, for. B. 9 is performed and thus a lateral stabilization within the base plate 2 and within the housing of the cutter 1 receives.

A further feature is that the shearing blade 4 has a cutting edge 20 which is inclined at an angle to the horizontal and which interacts with the cutting edge of the knife 6 . In a first advantageous embodiment, the cutting edge 20 is designed as a bevel and can thus make a clean cut in relation to the blade 6 , in particular in relation to the cutting area 32 . It is important here that the cutting area 32 is set back on the knife in relation to the cutting area 31 in order to enable a clean cut or a simultaneous cut of the two shearing blades 4, 5.

In figure 9 Another embodiment of the cutter is shown, with both the shearing blade 4 and the shearing blade 5 having a special contour 28, so that the two shearing blades 4, 5 can be controlled differently.

The shaving blade 4 has a contour 28 which enables power to be transmitted to the shaving blade 4 during a first rotational movement, while the blade runs freely during another rotational movement in the opposite direction.

The contour 28 has an almost horizontal recess in an upper region, in which the driver 13 engages and thus a power transmission proceeding from the drive wheel 12 to the shearing blade 4 takes place. If the drive wheel or driver rotates in the direction of arrow 25, the shearing blade 4 moves linearly in the vertical direction of arrow 34. Starting from the rest position, a rotary movement can now take place in the direction of arrow 26, as a result of which the driver moves into the freewheel surface 27 and the shearing blade 4 remains in its rest position.

According to the embodiment of figures 8 and 9 a rotational movement takes place in direction 25, and the shearing blade 4 is pivoted in the vertical direction downwards. The other blade 5 remains in its rest position.

If a rotary movement takes place in the direction of arrow 26, the shaving blade 4 remains in its rest position due to the freewheel surface 27, while the shaving blade 5 is pivoted downwards due to the special design of the contour 15. It is now possible for the first time to have two with just one motor to control different shearing blades 4, 5 and thus to perform two different cuts on a continuous material.

It is therefore also possible for the first time compared to the prior art to make highly asymmetrical partial cuts, because according to the prior art only a partial cut with a central web was ever possible.

The invention has the advantage that a cut can be made in the reinforced edge area, for example, while the web area or the cut-free zone 29 can also be arranged off-centre.

the figure 10 shows the plan view of a web of material 35, on one side of which a cut 36 made by the shearing blade 5 is applied, which extends from one side to beyond the middle of the web of material 35.

The shearing blade 4 makes a short cut 37 from the opposite side of the material web 35 (in the length of the material web 35) offset to the cut 36 of the shearing blade 5. Due to the mutual offset of the two cuts 36, 37, the material web 35 is not severed, although the sum of the two cut lengths of the cut 36, 37 corresponds to the width of the material web. Due to this offset of the two cuts 36, 37, an uncut web 38 is formed between the inner end of the cut 36 and the inner end of the cut 37. The complete tearing of the material web 35 requires little effort, because the two opposite ends of the the two cuts 36, 37 overlap at an angle, resulting in a large shearing force on the web 38.

In summary, it can be said that with the invention it is possible, starting from just one motor, to control two different shearing blades 4, 5, with a first shearing blade 4 making a cut in the side area can take place, while a partial cut can be made with a second shearing blade 5, so that a cut-free zone remains in relation to the remaining section. This makes it possible for the user for the first time to tear off a ticket or a packet from a continuous material without any effort.

drawing legend

1

cutter

2

base plate

3

engine

4

shear blade

5

shear blade

6

knife

7

step

8th

attachment point

9

attachment point

10

swivel bearing

11

passage

12

drive wheel

13

driver

14

contour

15

contour

16

limit switch

17

arrow direction

18

arrow direction

19

guide bar

20

cutting edge

21

cutting edge

22

guide bar

23

surface

24

working position

25

arrow direction

26

arrow direction

27

free running area

28

contour

29

cut-free zone

30

trailing surface

31

cutting area

32

cutting area

33

arrow direction

34

arrow direction

35

web of material

36

Cut (of 5)

37

Cut (of 4)

38

web

Claims (8)

1. Cutter for strip-like or tape-like materials of all types having an electromotor drive for two shearing blades (4, 5) which drives the shearing blades (4, 5) in a displaceable manner against a fixed knife (6), wherein the one shearing blade (4) is designed as a vertically movable guillotine knife and in that the other shearing blade (5) is designed as a pivot knife, wherein the electromotor drive (motor 3) acts in parallel on the movement drive of the two shearing blades (4, 5) which can be moved separately from one another and both execute a cutting movement against the fixed knife (6), wherein the electromotor drive is designed as a motor (3) which drives a drive wheel (12) in rotating manner, on which a carrier (13) is arranged eccentrically to the rotational axis, characterised in that the carrier (15) on the drive wheel (12) engages at the same time in slotted guides (14, 15) of the two shearing blades (4, 5) and drives the latter together in a displaceable and/or pivotable manner.
2. Cutter according to claim 1, characterised in that the motor (3) carries on its drive shaft a pinion which meshes with the toothing of the drive wheel (12) and drives the latter in a rotating manner.
3. Cutter according to one of claims 1 or 2, characterised in that the slotted guide of the shearing blade (4) designed as a guillotine knife is designed as a contour (14) running obliquely to the horizontal for displaceable engagement of the carrier (13).
4. Cutter according to one of claims 1 to 3, characterised in that the slotted guide of the shearing blade (5) designed as a pivot knife is designed as an approximately C-shaped contour (15) for displaceable receiving of the carrier (13).
5. Cutter according to one of claims 1 to 4, characterised in that an opening (11) for the goods to be cut is formed so that the upper horizontal edge of the opening (11) is formed by the horizontal lower edge of the pivotable shearing blade (5) and the lower horizontal edge of the opening (11) is formed by the upper horizontal edge of the fixed knife (6).
6. Cutter according to one of claims 1 to 5, characterised in that the pivotable shearing blade (5) executes a cut (36) extending from the side edge of the material web (35) to above the centre of the material web (35), and in that the vertically displaceable shearing blade (4) executes a second cut (37) starting from the opposite side edge of the material web (35) and ending only shortly before the first cut (35).
7. Cutter according to claim 6, characterised in that the two cuts (36, 37) in the material web (35) are offset obliquely to one another and between them form a tearable bridge (38).
8. Material web, cut with a cutter according to claim 7, characterised in that the material web (35) is cut with a longer first cut (36) and an opposing second cut (37) offset obliquely to the first cut (36), and in that an uncut bridge (38) remains in the material web (35) between the two cuts.

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