Patent Publication Number: US-2023157307-A9

Title: Cutting apparatus

Description:
The invention relates to a cutting apparatus for slicing and/or dividing meat products, in particular bacon and/or fresh meat products, having a product feed that is configured to guide at least one first product and at least one second product simultaneously along a feed direction into a cutting region in which slices and/or pieces are cut off from the products. 
     Furthermore, the invention relates to a method of slicing and/or dividing meat products, in particular bacon and/or fresh meat products. 
     Provision may frequently be made in the course of a processing process of meat products, and in particular of bacon and/or of fresh meat products, to slice or to divide relatively large pieces of natural meat into slices or individual pieces and to offer them for sale in such a manner. For example, before a sale or a delivery to a seller, slices of chops can be produced by a slicing of relatively large rib pieces of an animal and can, if necessary, be put together and/or packaged as a portion that comprises at least one such slice. Provision can likewise be made to divide large roast pieces into partial pieces as required before a sale or also to slice such a meat product into slices to be offered for sale. Bacon may also be offered in portions comprising one or more slices or pieces that were produced by slicing a larger piece of meat or bacon. 
     To be able to achieve a desired product throughput in such a processing of fresh meat products, the slicing or division of the meat products can take place mechanically by means of a cutting apparatus. In this respect, the products can be loaded onto a product feed and can be automatically guided by it into a cutting region in which slices and/or pieces are cut off from the products. To further increase the product throughput, provision can furthermore be made to feed a plurality of or at least two products simultaneously into said cutting region so that these products can be simultaneously cut into slices and/or pieces. 
     However, the problem in particular results on the processing of fresh meat products or bacon that extremely high cutting forces and precise cuts are required for a slicing or division of such products to be able to divide products that, for example, include bones in a reliable manner and in particular without the risk of a splintering of the bone or to be able to cut off thin slices from a piece of bacon. Furthermore, such natural products to be processed can have major differences, for example with respect to the structure of the tissue or to the position and thickness of bones, so that an adaptation of the cutting process to a respective product or to different product batches may be necessary. The desired thickness of the slices or size of the pieces that are cut off from a product may in particular also vary in dependence on the respective product type and on the associated manner in which the product is to be offered for sale so that the cutting process can also be adapted to that effect. 
     Furthermore, an adaptation of the cutting process by processing pieces in one batch that were removed from different halves of an animal may also be necessary on the processing of fresh meat products that are in principle of the same type and correspondingly are to be processed in the same manner, for example, on a processing of rib pieces of an animal. In this respect, the position of a bone can be exactly opposite for products from different halves of an animal so that a cutting process adapted to products of one half of an animal requires exactly the opposite settings for products of the other half. 
     These difficulties in the processing of meat products, and in particular of bacon and/or fresh meat products, usually require extremely complex and space-intensive designs of the cutting apparatus provided for slicing and/or dividing the products. A desired product throughput, for example, to be able to process products from different halves of an animal or different types of products at the same time can frequently only be achieved by providing a plurality of separate cutting apparatus for processing the products. However, this requires—in addition to the considerable additional costs for the purchase of a further machine—a space that is usually not sufficiently available in practice as well as a complicated and time-consuming sorting and feeding of the products to the individual machines. 
     It is therefore an object of the invention to provide a cutting apparatus of the initially named kind that, in a compact design, makes it possible to achieve a flexible cutting process adapted to the requirements for processing such products and a high product throughput. 
     This object is satisfied by a cutting apparatus having the features of claim  1  and in particular in that, in a cutting region, slices and/or pieces are cut off from the products by means of a first rotating blade and by means of a second rotating blade, wherein the product feed has a first conveying means for guiding the at least one first product into the cutting region and a second conveying means for guiding the at least one second product into the cutting region, wherein the first blade is associated with the first conveying means and is provided for cutting off slices and/or pieces from the at least one first product, and wherein the second blade is associated with the second conveying means and is provided for cutting off slices and/or pieces from the at least one second product. 
     With respect to the processing of meat products, and in particular of fresh meat products, provision can in this respect be made to cut off relatively thick slices, for example chops approximately 5 cm thick, from the products so that said cut-off slices can also be understood as small pieces of the products. Furthermore, such meat products can also be divided into relatively large, no longer slice-like part pieces, for example, by dividing a roast piece into portions as required. However, meat products such as bacon can also be cut into thin slices that are, for example, intended as a topping, wherein the provided slice thickness may vary in dependence on the use or on the type of the product. For example, so-called streaky bacon can frequently be cut into somewhat thicker slices, whereas back bacon can be cut into thin slices. 
     The products can be processed completely independently of one another by providing a respective conveying means for the first product and the second product by means of which the first product and the second product are guided into the cutting region and by cutting off slices and/or pieces from the respective products by means of separate blades. For this purpose, the conveying means and the rotating blades can in particular be drivable independently of one another so that the cutting process can be carried out in a specifically adapted manner both for the first products fed by means of the first conveying means and for the second products fed by means of the second conveying means. Thus, a simultaneous and independent cutting operation for meat products or fresh meat products guided on multiple tracks into the cutting region can be achieved with a single and correspondingly compact and space-saving machine design. 
     For example, different types of products can be simultaneously fed by a respective one of the conveying means into the cutting region and can be processed so that, for example, rib pieces to be processed into chops can be guided into the cutting region by the one conveying means and roast pieces to be divided into pieces can simultaneously be guided into the cutting region by the other conveying means. In this respect, the cutting process can be exactly adapted to the requirements of the fed products by also providing respective associated blades and not only one common blade for dividing the products simultaneously guided into the cutting region. For example, relatively narrow chop slices can be cut off from the first product by means of the first blade, whereas relatively large part pieces in comparison thereto can simultaneously be cut off by the second blade from a second product guided into the cutting region by the second conveying means. 
     However, it is also possible to operate both conveying means and/or blades synchronously, for example, to be able to simultaneously slice two products and to thereby be able to increase the product throughput. An operation of the cutting apparatus on multiple tracks or two tracks can in this respect in particular be provided in order, for example, to be able to simultaneously process bacon in two tracks and to be able to form portions comprising one or more slices in both tracks. 
     These portions can then, for example, be simultaneously transported away and fed to further processing steps, in particular to a packaging machine for packaging the portions. 
     Provision can furthermore be made to coordinate the two conveying means and the respective associated blades with one another such that products from different halves of an animal can be simultaneously sliced or divided by means of the cutting apparatus in ideally adapted cutting processes. 
     For this purpose, the blades can in particular rotate in opposite senses with respect to one another so that the cutting process for products fed by means of the first conveying means and by means of the second conveying means can take place in a mirrored manner to a certain extent. Due to a sorting or an association of the products of different halves of an animal with the respective conveying means, it can thus be achieved that a product having a bone, irrespectively of the half of an animal from which the product was taken, can, for example, always be guided into the cutting region in a radially inwardly disposed or radially outwardly disposed manner with respect to the respective axis of rotation of the blades. An ideally adapted cutting process for products of both halves of an animal can in this respect in particular be achieved with the same settings, such as the same rotational speeds of the blades or the same feed speeds of the products. Due to the design in a single machine, the sorting and loading of the products onto the respective conveying means can take place in an uncomplicated and fast manner. 
     Furthermore, it can be achieved by such a rotation of the blades in opposite senses that an outwardly directed force is always transmitted from the respective blade to the cut-off slices and/or pieces so that the slices and/or pieces of one product are not accelerated in the direction of the respective slices and/or pieces cut off from the other product. This can in particular facilitate the placement of the slices and/or pieces and a possible overlap of the slices and/or pieces of two simultaneously processed products can be prevented. In addition, small pieces or snippets that are, for example, produced on a slicing of bacon can be hurled outwardly by such a blade rotation and can, for example, be collected in a collection region to be able to remove or dispose of these snippets. Such snippets can thereby in particular also be prevented from entering a region in which the portions of the product processed by means of the respective other blade are formed so that the finished portions can be fed free of such snippets to further processing steps and, for example, to a packaging machine. 
     Due to the possibility of processing at least two products independently of one another and simultaneously with a single machine design, the number of components necessary for such an independent operation and, correspondingly, the space requirement of the cutting apparatus can be minimized. In this respect, specific functions or components that generally have to be provided a multiple of times in an independent operation with a plurality of machines can be jointly provided for the products fed by means of the first conveying means and the products fed by means of the second conveying means and a compact arrangement can be achieved. The cutting apparatus can in particular, for example, have a common and compact housing for both conveying means and both blades and the blades can be shielded by a common access protection. 
     Furthermore, a common control device or a common switch cabinet can be provided for the arrangement of the electronic components of the cutting apparatus or for common motors, for example, for driving the blades. 
     Since the conveying means can in particular be drivable independently of one another and can generally be loaded with products independently of one another, only one of the conveying means can also be used to guide products into the cutting region in specific operating situations. This can, for example, be provided in the case of a low utilization of the cutting apparatus or in the case of specific product batches that, for example, only comprise products from one half of an animal. Similarly, it is also possible to feed two or more products simultaneously on one conveying means and, for example, disposed next to one another into the cutting region in order to simultaneously slice or divide a plurality of products by means of one or both blades. The product throughput can thereby also be increased, in particular for relatively narrow products. 
     The arrangement of two conveying means consequently does not require an exclusively two-track operation, i.e. a plurality of tracks, in each of which a product is processed, can be associated with a respective conveying means. 
     The conveying means can furthermore in particular have a support surface for the products that can, for example, be formed by a sliding surface or by a conveyor belt. Furthermore, the product feed can have a feed means and/or a guide means, such as a product holder, by means of which the products can, for example, be held and guided in a rear region during a feed into the cutting region. Such a product holder can in particular serve to briefly stop or interrupt the feed of the products to enable a transporting away of formed slices and/or pieces. In addition, an end piece of a product that is not suitable for forming a slice or a piece can be removed by means of a product holder. Furthermore, such a product holder can be provided in the case of a conveying means formed with a sliding surface in order to effect the feeding of the products on the sliding surface into the cutting region. 
     However, in particular in the case of a cutting apparatus for processing bacon, provision can also be made to simultaneously feed a plurality of products directly contacting one another to the respective associated blade by means of the conveying means, wherein slices and/or pieces can always be cut off from the front product end of the front product. In this respect, the conveying means can in particular also be configured as conveyor belts, for example as belts or straps running around continuously, and the above-mentioned product holders can be omitted. 
     In particular in the case of bacon, end pieces that, for example, have to be sorted out by means of a product holder for other products can generally also be processed and can, for example, form a part of a portion. In this respect, a scale can be arranged in a portioning region of the cutting apparatus to be able to recognize a cut-off end piece or a portion having such an end piece or a slice cut off from an end piece that can in particular have a lower weight in the case of a number of slices and/or number of pieces provided for a respective portion. A further slice and/or a further piece can, for example, be added to such a portion by only feeding or transporting away the portion to or from possible further processing steps after at least a first slice or a first piece of the following product has been cut off and a desired weight has been achieved. Alternatively to this, a portion having an end piece and/or having a slice of an end piece and/or the end piece can be fed to a further processing process. For example, the portion and/or the end piece can be sliced or divided by means of a cutting machine suitable for this purpose into small cubes or pieces of irregular shape that can likewise be packaged and offered for sale. 
     Further possible embodiments can be seen from the dependent claims, from the description, and from the drawing. 
     In some embodiments, the first conveying means and the second conveying means can extend next to one another offset in parallel along the feed direction. Due to this parallel alignment of the conveying means, a narrow design of the product feed and of the total cutting apparatus can in particular be achieved. Furthermore, such a parallel alignment of the conveying means and a corresponding arrangement of the blades can enable a symmetrical design of the cutting apparatus so that in particular both the conveying means and the blades as well as further devices, for example for suspending and fixing the conveying means, can be of similar design and can be arranged with only an opposite orientation. This can enable a modular design of the cutting apparatus with similar and prefabricated components so that in particular an assembly of the cutting apparatus or a dismantling of individual components, for example for cleaning or maintenance, can also be simplified and accelerated. 
     Furthermore, an access at both sides to the product feed can be achieved by a parallel alignment of the conveying means along the feed direction so that products can be flexibly loaded onto the respective conveying means. This can enable a simple sorting of the products that can be carried out quickly. Alternatively, in a parallel design, it is also possible to provide a possibility of access to the product feed at only one side and to arrange a wall element as access protection at the oppositely disposed side, for example. 
     Provision can be made that both the first conveying means and the second conveying means as well as the first blade and the second blade are arranged in mirror symmetry with one another with respect to a separation plane extending between the conveying means, wherein the conveying means can in particular be aligned offset in parallel with one another along the feed direction. The feed direction and a direction perpendicular to a surface on which the products guided into the cutting region are disposed can in particular extend in the separation plane. Such a mirror-symmetrical design of the cutting apparatus can in particular make it possible to process substantially opposed products, for example products from different halves of an animal having an opposite orientation of bones, at the same time with the same settings of the cutting process and ideally adapted by an association of the products with respective conveying means. The blades arranged in mirror symmetry with one another can in this respect in particular be set into rotations in opposite senses to be able to slice and/or divide products fed by means of the first conveying means in the same manner as products oriented oppositely thereto and fed by means of the second conveying means. 
     The product feed can comprise a common support structure for the conveying means, with the support structure in particular being able to be fixedly connected to a frame supported on the ground. The conveying means can thus be attached to a common structure to enable a narrow and compact design of the cutting apparatus. Furthermore, by fixing the support structure to a frame supported on the ground, it can be achieved that no relative movement of the support structure or of the conveying means held thereat takes place with respect to the frame, but rather that the conveying means are held in a predefined position. This can enable a reliable positioning of the conveying means for guiding the products into the cutting region, wherein this positioning can in particular be selected such that the conveying means are laterally accessible in a simple manner to load products, for example. 
     In some embodiments, the support structure can have a center support that extends in the feed direction and that is arranged between the first conveying means and the second conveying means, with the first conveying means and the second conveying means being held at the center support. 
     The center support can thus to a certain extent form a central structure of the product feed at which the conveying means are held. In this respect, the conveying means can in particular be arranged offset in parallel with one another with respect to the feed direction and can be connected to the center support at respective opposite sides thereof. Accordingly, the center support can also define the already mentioned separation plane or can extend within it so that a mirror-symmetrical and compact design of the cutting apparatus with respect to the center support can result. 
     It can be achieved by such a center support extending in the feed direction and carrying the conveying means that the product feed and correspondingly also the cutting apparatus overall mainly extend along the feed direction. Thus, a narrow design of the cutting apparatus with respect to a direction perpendicular to the feed direction can be achieved. 
     Provision can be made that further components of the cutting apparatus, in particular electronic components for driving the conveying means and/or the blades as well as for controlling the conveying means and/or the blades, are arranged in the region of the center support and/or beneath the conveying means. Since the components for controlling and driving the blades and the conveying means can also be arranged in a central region of the product feed or beneath the conveying means, the space available there that is anyway occupied by the product feed can be used to achieve a compact design of the cutting apparatus. An extent of the cutting apparatus or of the product feed perpendicular to the feed direction can thereby in particular be minimized. A blocking or disruption of the access to the conveying means, for example to load products, can also be avoided by the arrangement of such components in a central region or beneath the conveying means. 
     Provision can be made that the first conveying means and the second conveying means comprise respective base parts that are selectively connectable to or releasable from the center support. For example, the conveying means can have a conveyor belt that runs around continuously and that is guided via two deflection rollers that are supported in such a base part. Equally, a conveying means configured as a sliding surface and optionally formed with a feed means can be connected to such a base part or can have a section that functions as a base part and that is connectable to the center support. 
     Since the base parts are selectively connectable to or releasable from the central part, the conveying means can be inserted into or removed from the product feed in a simple manner. Due to this simple possibility of attaching and releasing the conveying means, a cleaning of the conveying means can in particular be carried out in a simplified and accelerated manner in that the time requirement for these assembly and dismantling steps can be minimized. 
     The hygiene regulations to be observed with respect to the processing of meat products, and in particular of fresh meat products, can thereby be met without the regularly required cleaning of the conveying means and the removal necessary therefor and the subsequent connection of the conveying means to the product feed causing relevant operating interruptions. Furthermore, a modular design of the product feed can be achieved by the provision of such base parts so that, for example, one conveying means can be exchanged in a simple manner with another conveying means of the same type to be able to continue the cutting operation during a cleaning of the one conveying means. 
     The center support can have at least one first mandrel which extends perpendicular to the feed direction and onto which the first conveying means can be plugged, and the center support can have at least one second mandrel which extends perpendicular to the feed direction and opposite to the first mandrel and onto which the second conveying means can be plugged. 
     In this respect, the conveying means can in particular have base parts that can be plugged onto the respective mandrels. For example, bores through which the respective mandrels can be guided can be designed in the base parts for this purpose. The center support can in particular have at least two first mandrels and at least two second mandrels to support the base parts of the conveying means safely and stably and to prevent a tilting of the conveying means. 
     Since the conveying means can be plugged onto mandrels in a simple manner for a selective connection to the center support, an attachment or a removal of the conveying means can take place in a fast and simple manner. Both the assembly of the product feed and a change of the conveying means or a removal, for example for a cleaning, can thus be carried out in a quick and uncomplicated manner. 
     The opposite orientation of the first mandrels and the second mandrels with respect to one another in turn enables a symmetrical or mirror-symmetrical design of the cutting apparatus with respect to a separation plane defined by the center support, with the conveying means being arranged offset in parallel from one another at opposite sides of the center support. A narrow design of the product feed can likewise be achieved in that the conveying means mainly extending in the feed direction can be plugged onto relatively short mandrels so that the extent of the conveying means perpendicular to the feed direction can ultimately be substantially predefined by the width of the products to be processed. 
     Provision can be made that the conveying means plugged onto the respective mandrels can be fixed to the center support by respective fixing means. For this purpose, the mandrels can, for example, be designed with threads onto which fixing elements can be screwed to prevent the conveying means from slipping off from the mandrels. Fixing elements that can be plugged onto the mandrels can also be provided. The conveying means can thereby in particular during operation be reliably connected to the center support and to the holding structure, wherein the fixing means can furthermore serve to arrange the conveying means in a predefined position after a plugging onto the mandrels and to ensure their correct positioning. The fixing devices can in particular be operable without tools to enable a simple attachment to the mandrels. 
     In some embodiments, the product feed can comprise a first drive for the first conveying means and a second drive for the second conveying means, by means of which drives the first conveying means and the second conveying means are drivable independently of one another. 
     Due to the possibility of being able to drive the first conveying means and the second conveying means independently of one another, the cutting processes provided for the first product and the second product can also be carried out completely independently of one another. Different types of products can thereby in particular be cut into slices and/or pieces by the first blade and the second blade, wherein pieces or slices of different sizes can in particular be cut off from the products by the independent drives of the first conveying means and of the second conveying means—irrespectively of whether the products are of the same type or of different types. Furthermore, due to the independent driving of the two conveying means, it is also possible, depending on the situation, to use only one of the conveying means for guiding products into the cutting region, whereas the other conveying means that is not used is not driven. 
     To implement such an independent driving of the conveying means, an associated motor can be provided for each of the conveying means. Similarly, only one motor can be provided to drive the conveying means, wherein a desired portion of the drive power can, for example, be directed to the respective conveying means by respective couplings. The drives of the conveying means, which can, for example, comprise so-called drum motors, can in particular be arranged in a base part of the conveying means, in particular in a deflection axle, rotationally driven by means of the drive, for a conveyor belt of the conveying means so that the necessary construction space for the arrangement of the drives can be minimized. 
     In some embodiments, the product feed for the first conveying means and/or for the second conveying means can comprise at least one respective product holder that is configured to hold the first product and/or the second product in a rear product section during the guidance into the cutting region. 
     Such a product holder can hold the first product or the second product, guided into the cutting region by means of the respective conveying means, in an end region and can thereby support the guidance into the cutting region. In this respect, in particular in the case of conveying means that have a conveyor belt that runs around continuously, such a product holder can be provided to achieve a feed of the first product and the second product independently of one another. 
     Furthermore, the respective held product can, for example, be briefly retracted or stopped by means of a product holder to briefly interrupt the guidance into the cutting region and, for example, to enable a transporting away of an already cut slice or of an already cut-off piece or of portions formed therefrom. Furthermore, such a product holder can also be provided to carry out the feeding of the products into the cutting region in the case of a conveying means formed with a sliding surface. A conveying means formed with a sliding surface for the products can in particular itself also comprise such a product holder and/or a product pusher for feeding the products into the cutting region. 
     In some embodiments, the feed direction can extend at least substantially horizontally and the blades can define a respective vertically oriented cutting plane. 
     Such a horizontal feeding of the products into the cutting region can make it possible to feed the products sufficiently far into the cutting region to be able to cut off relatively large pieces or thick slices. In this respect, it can be avoided that such a further feeding of the products into the cutting region, such as is possibly the case with a feed inclined with respect to the horizontal, is blocked by a surface not arranged in parallel, for example horizontally, with the feed direction for collecting the cut-off slices and/or pieces. Furthermore, a product which has been advanced far and of which a large or long section is correspondingly no longer supported by the conveying means directly before a cut, can already be disposed on and supported by a likewise horizontally oriented surface for collecting the cut-off slices and/or pieces in order, for example, to prevent a bending of the product. Such a surface for collecting the products can in particular form a portioning region and can be configured as a conveyor belt to transfer the cut-off slices and/or pieces or portions formed therefrom to possible devices arranged downstream. 
     The respective cutting planes defined by the blades can in particular be disposed in a common plane so that the blades can be arranged at the same height with respect to the feed direction. Alternatively, provision can be made that the blades are in particular arranged slightly offset in parallel with one another and correspondingly define cutting planes offset in parallel. Similarly, possible placement regions or portioning regions in which the slices and/or pieces of the first or second product are collected or caught can also be arranged at the same height or offset from one another relative to the respective cutting places and correspondingly with respect to the feed direction. 
     With respect to a respective axis of rotation about which the blades rotate in operation, the blades can in particular be arranged slightly offset in parallel with one another in an axial direction and can be arranged in a radial direction such that the blades can at least sectionally overlap during a rotation. The spacing between respective blade mounts in which the blades are held can in particular be smaller in the radial direction than twice the maximum radial extent of the blades. The parallel offset of the blades in this respect makes it possible to arrange the blades—in particular with inwardly directed blade tips if the blades are configured as one-armed scythe-like blade having narrow knife blades—as sectionally overlapping one another and with the smallest possible spacing from one another in the radial direction to be able to configure the cutting apparatus as narrow and space-saving. 
     Alternatively to a horizontal feeding of the products, provision can furthermore be made in some embodiments that the feed direction extends in an inclined manner. The blades can define a respective cutting plane that extends at least substantially perpendicular to the feed direction. Such an inclined feed direction can in particular be provided on a processing of bacon to be able to achieve a controlled placement of the cut-off slices. 
     Provision can furthermore be made that the inclination of the conveying means is variable. The conveying means can, for example, be pivotable for this purpose. The orientation of the blades can in this respect be adapted to the inclination of the conveying means so that the blades always define a cutting plane perpendicular to the feed direction in which the blades rotate. The flexibility with respect to the use of the cutting apparatus can also thereby be increased further since, for example, a horizontal orientation of the conveying means can be selected on a division of the products into relatively thick slices or pieces, whereas an inclined feed direction can be set on a cutting off of thinner slices for an improved placement of the slices. Provision can furthermore be made to carry out the loading of the conveying means with products in a horizontal orientation of the feed, whereas the cutting process can take place with an inclined feed direction. 
     In some embodiments, the first blade can be held in a first blade mount and the second blade can be held in a second blade mount, wherein the first blade mount and the second blade mount can be set into rotations in opposite senses with respect to one another. Respective drives that are controllable independently of one another and that in particular have respective electric motors can in this respect be provided to set the blade mounts into rotation. The blades can be held in mirror symmetry with one another in the blade mounts with respect to a separation plane that extends between the conveying means and that is in particular defined by said center support so that similar products from different halves of an animal can, for example, be fed to a respective one of the blades by the rotations in opposite senses and all the products can be sliced in the same manner by this sorting. 
     The first blade and the second blade can be configured as one-armed scythe-like blades having narrow curved knife blades. Such a one-armed blade can in particular be held at a blade mount at one of its ends so that the blade makes only one cut during a rotation. 
     Due to the configuration of the blades with narrow knife blades, a low weight of the blades can be achieved, which can in particular make it possible to accelerate the blades during a rotation in order to generate sufficient cutting forces or to decelerate said blades in order to release the cutting region for a sufficiently long period of time for a feeding of the products. The curvature of the blade or of its blade edge can in this respect in particular be selected such that, on a rotating movement of the blade for cutting a product, the knife blade is pulled along the product in every rotational position, where possible, so that a pulling cut takes place. A precise cutting off of a slice or of a piece can thereby be achieved and the required cutting forces can be minimized, in particular in comparison with a chopping movement of the blade. 
     In some embodiments, the first blade and the second blade can have a respective blade edge that is at least sectionally of spiral shape, with the blade edge in particular extending at least sectionally in the shape of an Archimedean spiral and/or extending at least sectionally in the shape of a logarithmic spiral. 
     Due to such a blade edge extending curved in a spiral shape, it can in particular be achieved that a pulling cut through the product to be sliced takes place during a rotation of the respective blade in every rotational position. The blade edge can in this respect, starting from an end held in a blade mount, in particular merge into a logarithmic spiral, starting from an Archimedean spiral, to achieve a smooth and pulling cut. 
     Provision can be made that the first blade and the second blade have a respective at least sectionally toothed blade edge. Such a blade edge can in particular be suitable for precisely cutting or dividing meat products rich in fiber and/or having bones into slices and/or pieces, which is frequently necessary particularly for the processing of fresh meat products. In this respect, the blade edges of the blades can have continuous and uniform toothed arrangements or they can also only be toothed in sections or can be formed with varying toothed arrangements. For example, a toothed arrangement of the blade edge can only be provided in a section of the blade edge that, during the rotation of the blade, passes through a region in which the position of a bone of a product to be sliced is to be expected. 
     Alternatively to a configuration of the blades as one-armed scythe-like blades having narrow knife blades, provision can also be made that the blades are configured as scythe-like blades having relatively wide knife blades. Furthermore, a configuration of the blades as circular blades is possible, for example. The blades can moreover have a smooth blade edge. The blades can in particular be exchangeable or replaceable so that, for example, a respective blade ideally adapted to a product to be processed can selectively be insertable into the blade mounts, for example. Provision can, for example, be made to insert a scythe-like blade having a wide knife blade and a smooth blade edge into the blade mount for the slicing of bacon, whereas one-armed scythe-like blades having narrow knife blades and sectionally toothed blade edges can be provided for slicing fresh meat products containing bones. 
     In some embodiments, a control device can be provided for controlling the rotational speeds of the rotating blades, with the control device being configured to accelerate and/or decelerate the rotations of the blades during a revolution for cutting off a slice and/or a piece. The control device can in this respect in particular be configured for an independent control of the rotational speeds of the blades. For example, the control device can comprise a microprocessor and/or a CPU (central processing unit) or can be configured as such. The control device can also be configured to control further components of the cutting apparatus, for example, the feed and/or the conveying means. 
     Since the rotational speeds of the blades are variable during a revolution, sufficient time for feeding a product into or through the cutting region before the blade engages into the product and cuts off a slice and/or a piece can in particular be obtained by a deceleration of one of the blades. This makes it possible to feed products relatively far into the cutting region in order to be able to cut off relatively thick slices or large pieces, for example, roast pieces as required. Due to the possibility of accelerating the blades again after a deceleration during a rotation, the forces required for slicing a meat product, and in particular a fresh meat product possibly containing bones, can nevertheless be generated. For this purpose, the blades can in particular be configured as one-armed scythe-like blades having narrow curved knife blades and a correspondingly low weight so that inertia forces that are as low as possible are to be overcome during a deceleration or an acceleration of the blades. However, provision can also be made to operate the blades at constant rotational speeds. 
     In some embodiments, a blade guide can be arranged in the cutting region and has a respective peripheral gap for the blades that is defined by a front boundary with respect to the feed direction and by a rear boundary with respect to the feed direction. 
     The respective peripheral gap and its boundaries thus form a guide for the blades with respect to the feed direction and the blades run around in the peripheral gap so that the cutting planes defined by the blades are also disposed in the peripheral gap. Due to the restriction of possible blade movements in the feed direction or of the guidance of the blade by the front and rear boundaries, a safe guidance and a straight cut can even be achieved at high cutting forces during a slicing of a product. Furthermore, it is possible to counteract an evasion or a canting of the blades due to possible force peaks or blows that occur during the cutting. In particular if the blades run around in a common cutting plane, the blade guide for the blades can have a common peripheral gap. Furthermore, the front and rear boundaries can be formed at a common component for the blades or at respective separate components. 
     Alternatively to this, the blade guide can have a respective peripheral gap for each blade, wherein the peripheral gaps can in particular be arranged offset in parallel from one another. 
     The front boundary and the rear boundary can have mutually aligned passages for the first product and/or for the second product. In this respect, the front and rear boundaries can form a frame-like border of the respective passages through which the products can be guided into the cutting region. The front boundary can in this respect in particular form a blade edge that can be configured as a so-called cutting screen due to the frame-like formation of the passage and as such can so-to-say form the end of the product feed. 
     In some embodiments, the first blade and/or the second blade can cover the maximum clearance of the passages during a rotation. It can thereby be achieved that the blades are surrounded by the front and rear boundaries during the total rotation or during the total cut both in the direction of the end to which a blade mount of the respective blade is connected and in the direction of the end which forms the blade tip and are guided and stabilized in the feed direction by said front and rear boundaries. It can thus be avoided that the blade tip, for example, stands freely in the passage during a cut and that possible forces acting on the blade in the feed direction can always be led off to the boundaries at two ends. A possible bending, evasion or tilting of the blade during a cut can thus be counteracted by this support at both sides. 
     In some embodiments, the cutting apparatus can have a portioning region in which portions that comprise at least one slice and/or at least one piece are formed from the cut-off slices and/or pieces. Such a portioning region can in particular directly adjoin or directly merge into the cutting region, wherein the cut-off slices and/or pieces can be placed on the portioning region and can, for example, be combined to form a portion. The portioning region can comprise at least one conveyor belt by means of which the complete portions can in particular be transferred to a conveying device arranged downstream to be able to feed the portions to further processing steps and, for example, to a packaging machine. 
     Furthermore, a scale for determining a portion weight can be arranged in the portioning region. Such a scale can in particular enable a recognition of end pieces and/or of portions comprising end pieces in order, for example, to be able to sort them and/or feed them to a separate processing. Furthermore, the scale can serve for a process control, for example, by continuing the portion formation until the portion reaches a predetermined desired weight, whereupon the portion can be transferred to the conveying device arranged downstream. For this purpose, the scale can, for example, be connected to a control device of the cutting apparatus and/or of the portioning region. 
     The invention further relates to a method of slicing and/or dividing meat products, in particular fresh meat products, wherein at least two products are fed along a feed direction into a cutting region in a cutting apparatus—in particular in a cutting apparatus as disclosed herein—in which slices and/or pieces are cut off from each of the at least two products by means of at least one respective rotating blade. 
     Due to the feeding of at least two products into the cutting region, wherein slices and/or pieces are cut off from the products by means of respective associated blades, two products can in particular be simultaneously sliced independently of one another and in a manner ideally adapted to the respective product. This can make it possible to achieve a high product throughput on a slicing and/or division of meat products with a simultaneous ideal adaption of the cutting process to the respective products. 
     The at least two products can be guided into the cutting region by means of respective conveying means arranged offset in parallel with one another. The parallel arrangement of such conveying means that are in particular drivable independently of one another can enable a narrow design of the cutting apparatus, wherein a completely independent cutting process can be achieved by associating the products with a respective conveying means and with a respective blade. 
     Provision can be made that the products are guided along a horizontal direction into the cutting region, with the blades rotating in a respective vertically oriented cutting plane. Alternatively to this, provision can be made that the products are guided along an inclined direction into the cutting region. The blades can in particular rotate in a respective cutting plane that is oriented perpendicular to the direction in which the products are guided into the cutting region. 
     Provision can be made that the blades are accelerated and/or decelerated during a rotation for cutting off a slice and/or a piece. In this respect, the deceleration of the blade can enable a product to be pushed far into the cutting region so that a relatively large piece or a relatively thick slice can thereupon be cut off. Due to the possibility of accelerating the blade again after a deceleration, the cutting forces required for slicing the meat products can in particular be generated despite the rotation speed that has slowed down in the meantime. However, provision can generally also be made that the blades rotate at a substantially constant speed during the operation. 
     Portions that comprise at least one slice and/or one piece can be formed from the cut-off slices and/or from the cut-off pieces, with the formed portions in particular being able to be conveyed onward by means of a conveying device arranged downstream. The portions can in this respect in particular be formed in a movable portioning region that can, for example, have a conveyor belt running around in the feed direction to be able to transfer the completely formed portions to a conveying device arranged downstream. Furthermore, the portion formation can be directly influenced by a movable portioning region in that the spacing of the slices and/or pieces of a portion can, for example, be changed or adapted by a pulling forward of the portioning region in the feed direction. Provision can also be made that the portioning region can be moved in further directions, for example perpendicular to the feed direction, in order e.g. to be able to form overlapping or stack-like portions in this transverse direction. 
     The conveying device arranged downstream can in particular feed the formed portions to further processing steps. For example, the conveying device can feed the formed portions to a packaging machine arranged downstream and can place them into or onto packaging spaces provided for this purpose—for example, into recesses produced in a film web by deep drawing or into separate packaging parts, e.g. so-called trays—so that the portions comprising at least one slice or at least one piece can be delivered completely packaged to a customer or a seller. 
    
    
     
       The invention will be described in the following purely by way of example with reference to an embodiment and to the drawings. There are shown: 
         FIGS.  1 A and  1 B  a side view or a plan view of a processing line for processing meat products using a cutting apparatus; 
         FIGS.  2 A and  2 B  a perspective rear view or a perspective front view of the cutting apparatus; 
         FIGS.  3 A and  3 B  a plan view or a side view of a product feed of the cutting apparatus; 
         FIG.  4    a perspective rear view of the cutting apparatus with the conveying means of the product feed removed and the frame removed; and 
         FIGS.  5 A and  5 B  front views of a cutting region for illustrating the arrangement of a first blade and a second blade and their design. 
     
    
    
       FIGS.  1 A and  1 B  show views of a processing line  87  for processing meat products and in particular fresh meat products or bacon. In this respect, products  13  and  15  shown in  FIGS.  1 A and  1 B , but not in  FIG.  3 A , are fed along a feed direction Z to different stations at which processing steps take place. 
     The products  13  and  15  can be loaded onto a feed  83  that has a conveyor belt  73  running around in the feed direction Z. By pulling forward this conveyor belt  73  of the feed  83 , the products  13  and  15  move into an introduction section  89  which is formed by a further conveyor belt  73  and in which an introduction device  91  is arranged. Said introduction device is configured to introduce the products  13  and  15  into a press  77  by a movement perpendicular to the feed direction Z. The products  13  and  15  that as natural products initially usually have an irregular shape can be compressed by means of the press  77  and can thereby be brought into a predefined shape or a shape required for further processing steps. 
     The pressed products  13  and  15  are fed from the press  77  to a distribution and sorting device  79  that has a conveyor belt  73  running around in a feed direction Z. In this respect, the distribution and sorting device  79  is configured to move this conveyor belt  73  perpendicular to the feed direction Z to transfer the products  13  and  15  to a first conveying means  25  or to a second conveying means  27  of a product feed  23 . 
     This product feed  23  forms a part of a cutting apparatus  11  for slicing and/or dividing the products  13  and  15  into slices and/or pieces that will be described in more detail in the following. 
     The product feed  23  is configured to feed the products  13  and  15  to a cutting region  17  in which slices and/or pieces are cut off from the products  13  and  15  by means of blades  19  and  21  rotating in a cutting plane S (cf.  FIGS.  2 B,  5 A and  5 B ). In this respect, at least one first product  13  can be guided into the cutting region  17  by means of the first conveying means  25 , while, simultaneously therewith, at least one second product  15  can be guided into the cutting region by means of the second conveying means  27 . Furthermore, the first blade  19  is associated with the first conveying means  25  and is provided to cut off slices or pieces from the first product  13 , whereas the second blade  21  is associated with the second conveying means  27  and is provided to cut off slices or pieces from the second product  15 . 
     To guide the products  13  and  15  into the cutting region  17 , both the first conveying means  25  and the second conveying means  27  comprise two respective conveyor belts  43  that run around in the feed direction Z (cf. in particular  FIGS.  2 A and  3 A ). The conveying means  25  and  27  in this respect substantially extend in the feed direction Z and are arranged offset in parallel from one another so that a narrow design of the product feed  23  can be achieved. 
     The conveyor belts  43  of the conveying means  25  and  27  are held on respective base parts  33  that comprise respective drives  39  and  41  of the conveying means  25  and  27 . An independent guidance of the first products  13 , which are guided into the cutting region  17  by means of the first conveying means  25 , and the second products  15 , which are guided into the cutting region  17  by means of the second conveying means  27 , can be achieved by these drives  39  and  41 . For example, first products  13  and second products  15  of different types can in particular be simultaneously fed into the cutting region  17  and pieces of different sizes or slices of different thicknesses can be cut off from the products  13  and  15  as required. For this purpose, the conveying means  25  and  27  can, for example, be operated at respective adapted speeds to guide the products  13  and  15  sufficiently far and independently of one another into the cutting region  17  before a cutting off of a slice or of a piece, taking into account the respective desired slice thickness. 
     Since respective blades  19  and  21  are associated with the conveying means  25  and  27 , a completely independent cutting process can be achieved for the products  13  and  15 . This can make it possible to simultaneously process at least two products  13  and  15  by means of the cutting apparatus  11  and to achieve a correspondingly high product throughput, wherein the cutting process can be take place ideally adapted to the respective product  13  or  15  despite this simultaneous processing. 
     To support or to monitor the guidance of the products  13  and  15  into the cutting region  17 , the product feed  23  further comprises product holders  75  for the conveying means  25  and  27 , wherein only the product holder  75  associated with the second conveying means  27  is shown in the Figures. These product holders  75  are configured to hold the products  15  or  13  in a rear region (cf.  FIG.  3 A ) and can in particular serve to briefly withdraw or stop the products  15  or  13  to interrupt the feed into the cutting region  17  and to enable a transporting away of already formed slices and/or pieces. To enable a permanent engagement of the product holders  75  into the provided end regions of the products  13  and  15  during their guidance into the cutting region  17 , respective guides  95  are provided in which the product holders  75  can, for example, be moved in and against the feed direction Z by means of spindle drives arranged within the guides  95 . These guides  95  are in this respect arranged above the conveyor belts  43  so that these guides  95  also do not increase, or at most slightly increase, the extent of the product feed  23  perpendicular to the feed direction Z (cf. also  FIG.  3 B ) so that the width of the cutting apparatus is hereby not unnecessarily increased. Embodiments without product holders  75  are generally also possible, however. Provision can in particular be made for the processing of bacon to merely guide the products  13  via the conveyor belts  43  into the cutting region  17 . 
     In the embodiment shown, the feed direction Z extends horizontally, wherein the cutting plane S defined by the blades  19  and  21  is vertically aligned. Due to this horizontal guidance of the products  13  and  15  into the cutting region  17 , a further feed of the products  13  and  15  through the cutting plane S can be made possible to be able to cut off relatively thick slices or large pieces, which can in particular be desired for the processing fresh meat products, from the products  13  and  15 . 
     Alternatively to this, an inclined feed direction Z can, however, also be provided, for example, in that a rear deflection of the conveying means  25  and  27  or of the conveyor belts  43  can be arranged higher than a deflection facing the cutting region  17 . A controlled placement of the slices can in particular be achieved on a cutting off of relatively thin slices. 
     As in particular  FIG.  2 B  shows, a portioning region  67  is arranged downstream of the cutting plane S, in which portioning region  67  the cut-off slices or pieces of the products  13  and  15  are collected and portions are formed that comprise at least one slice or one piece. Said portioning region has a conveyor belt  73 , comprising a plurality of straps and running around in the feed direction Z, for each of the products  13  and  15 , wherein only the conveyor belt  73  that is associated with the second conveying means  27  is shown in  FIG.  2 B . The conveyor belt  73  of the portioning region  67  that is associated with the first conveying means  25  can, in contrast, be seen in  FIGS.  2 A and  4   . In addition to the collection and transporting away of cut-off slices or pieces, the conveyor belts  73  of the portioning region  67  also serve to support the products  13  and  15 , which are fed horizontally far through the cutting plane S, during a slicing so that a bending of the products  13  and  15  can be avoided, for example. 
     Due to a pulling forward of the conveyor belts  73  of the portioning region  67 , formed portions comprising at least one slice of at least one piece can be transferred in the feed direction Z to a conveying device  71  arranged downstream that can feed the portions to further processing steps and, for example, to a packaging machine for packaging the portions (cf. also  FIGS.  1 A and  1 B ). 
     Furthermore, the arrangement of a plurality of slices or pieces combined to form a portion can be influenced by a pulling forward of the conveyor belts  73  so that, for example, the slices of a portion can be arranged overlapping one another in the feed direction Z. 
     As the perspective rear view of  FIG.  2 A  shows, the product feed  23  has a common support structure  28  for the conveying means  25  and  27 . This support structure  28  comprises a center support  31  that substantially extends in the feed direction Z and that is arranged between and holds the conveying means  25  and  27 . This center support  31  thus so-to-say forms a central structure of the product feed  23  and defines a vertical separation plane with respect to which the conveying means  25  and  27  and the blades  19  and  21  are arranged symmetrically or mirror-symmetrically (cf. in particular also  FIG.  3 A ). Furthermore, the center support  31  is fixedly connected to a frame  29  of the cutting apparatus  11  supported on the ground so that neither the center support  31  nor the conveying means  25  and  27  held thereat are movable relative to the frame  29 , apart from the revolving movement of the conveyor belts  43  in the feed direction Z, and the conveying means  25  and  27  always remain in the provided orientation for guiding the products  13  and  15  into the cutting region  17 . 
     Since the center support  31  arranged between the conveying means  25  and  27  holds the conveying means  25  and  27 , they are arranged offset in parallel from one another with respect to the feed direction Z. This enables a narrow and symmetrical design of the cutting apparatus  11  with respect to a direction perpendicular to the feed direction Z so that a simultaneous slicing of the products  13  and  15  can be achieved by means of a single, compact mechanical design. 
     Furthermore, this symmetrical design of the product feed  23  having conveying means  25  and  27  held at oppositely disposed sides at the center support  31  enables access at both sides to the product feed  23  so that products  13  and  15  can, for example, be loaded onto the conveying means  25  and  27  from both sides (cf.  FIGS.  3 A and  3 B ). Such a loading, for example a manual loading, of the products  13  and  15  can in particular be provided if the cutting apparatus  11  is not provided as a part of the processing line  87 , but the cutting operation is rather independent of further processing steps. 
     A switch cabinet  81  is arranged beneath the conveyor belts  43  of the conveying means  25  and  27  and comprises the electronic components of the cutting apparatus  11  and in particular a control device  53 . The switch cabinet  81  is thereby arranged in a region in which the product feed  23  anyway has to have a certain extent for the attachment of the conveying means  25  and  27  so that this extent is at least substantially not increased by the switch cabinet  81  and a compact and narrow design of the product feed  23  can be achieved. Furthermore, the switch cabinet  81  also serves to support the center support  31  and to fixedly connect it to the frame  29  (cf.  FIG.  4   ). 
     The control device  53  arranged in the switch cabinet  81  can in particular be configured to control the drives  39  and  41  independently of one another so that the products  13  and  15  can also be independently guided into the cutting region  17  and, for example, at different speeds. Furthermore, the control device  53  can be configured to control the rotations of the blades  19  and  21  and in particular to vary their rotational speeds during one revolution, as is described below. For this purpose, the control device  53  can comprise a microprocessor and/or a CPU, for example. 
     As  FIG.  4    shows, the center support  31  has four first mandrels  35  which extend perpendicular to the feed direction Z and onto which the first conveying means  25  or its base part  33  can be plugged. Four second mandrels  37  are likewise provided perpendicular to the feed direction Z and opposite to the first mandrels  35  for the plugging on of the second conveying means  27 . This makes it possible to selectively connect the conveying means  25  and  27  to the center support  31  or to release them therefrom in a simple manner so that the conveying means  25  and  27  can, for example, be removed from the product feed  23  in a fast and uncomplicated manner for cleaning purposes. Furthermore, due to such a modular design of the product feed  23 , a use of the same and exchangeable components can be achieved and the attachment or assembly of the conveying means  25  and  27  can also be facilitated. To reliably hold the conveying means  25  and  27  in a predefined position, in particular during a cutting operation, fixing elements can furthermore be provided that can be plugged onto or screwed onto the mandrels  35  and  37  to prevent the conveying means  25  and  27  from slipping off from the mandrels  35  and  37 . 
     As can in particular be seen from  FIG.  5 A , the first blade  19  is held in a first blade mount  45  and the second blade  21  is held in a second blade mount  47 . Furthermore, the blades  19  and  21  are oriented in mirror symmetry with one another with respect to the already mentioned vertical separation plane that is defined by the center support  31  and that extends in parallel with the feed direction Z and centrally between the conveying means  25  and  27 . 
     Provision can be made that the blades  19  and  21  or the associated blade mounts  45  and  47  can be set into rotations in opposite senses by the control device  53 . It can thereby, for example, be achieved that products  13  or  15  removed from different halves of an animal are processed simultaneously by means of the cutting apparatus  11  and that the cutting processes can take place ideally adapted to the respective products. For example, the products  13  and  15  of different halves of an animal can be sorted onto the conveying means  25  and  27  such that a bone is, for example, always guided into the cutting region  17  in a manner inwardly disposed or outwardly disposed on both the first conveying means  25  and the second conveying means  27  with respect to said separation plane. Due to the rotation in opposite senses of the blades  19  and  21  arranged in mirror symmetry with one another, an approximately uniform cut can in this respect be performed for both products  13  and  15 , with in particular the bone being able to be cut through first or last. Such a sorting can in particular take place automatically by means of the distribution and sorting device  79  shown in  FIGS.  1 A and  1 B . 
     The blades  19  and  21  are configured as one-armed scythe-like blades having narrow knife blades  49 . This makes it possible to design the blades  19  and  21  with a relatively low weight so that the blades  19  and  21  can be accelerated and decelerated during a rotation for cutting off a slice and/or a piece. Such a deceleration of the blades  19  and  21 , for example caused by the control device  53 , during a rotation can increase the time available for a feeding into the cutting region  17  during which the blades  19  and  21  do not engage into the products  13  and  15 . Accordingly, the products  13  and  15  can be fed sufficiently far into the cutting region  17  to be able to cut off relatively thick slices or large pieces. Due to an acceleration of the blades  19  and  21  that follows a deceleration, the cutting forces can be generated that are necessary for cutting off a slice or a piece and that are in particular high for processing fresh meat products. However, provision can in particular also be made in dependence on the respective product  13  to be processed and/or on the slice thickness or piece thickness to drive the blades  19  and  21  at a rotational speed that is constant during a blade rotation. 
     The respective blade edges  51  of the blades  19  and  21  first extend in the shape of an Archimedean spiral, starting from the respective blade mount  45  or  47 , and extend in the shape of a logarithmic spiral toward the blade tips  93 . This design of the blade edges  51  of the blades  19  and  21  can make it possible to always perform a pulling cut during a rotation of the blades  19  and  21  for cutting off a slice or a piece from the products  13  and  15  to be able to perform said cut precisely and without the occurrence of large force peaks. Furthermore, the blade edges  51  can be at least partly toothed in particular in order to enable a cutting through of bones which fresh meat products to be processed may have, for example. 
     Alternatively to this, the blades  19  and  21  can, for example, also be configured as scythe-like blades having wide knife blades or as circular blades. In addition, the blades  19  and  21  can be formed with smooth blade edges. An ideally adapted blade  19  or  21  can in particular be selectively inserted into the respective blade mount  45  or  47  and in dependence on a product  13  to be processed. 
     As in particular  FIGS.  2 B and  5 B  show, a blade guide  55  is arranged in the cutting region  17  and has a rear boundary  61  and respective front boundaries  59  for the blades  19  and  21 , wherein only the front boundary  59  for the second blade  21  is shown. In this respect, the rear boundary  61  and the front boundary  59  form a respective peripheral gap  57  in which the blades  19  and  21  revolve and in which the cutting plane S extends. Due to the arrangement of the blades  19  and  21  in such a peripheral gap  57 , the blades  19  and  21  can be reliably and stably guided with respect to the feed direction Z and a possible deflection, bending or tilting of the blades  19  and  21  due to force peaks or blows occurring during a cut can be counteracted. A boundary attachment  85  shown in  FIG.  5 A  is provided to also closely guide the blade  21  in the direction of the rear boundary  61  during a cut and to compensate the offset of the blade  21  from the rear boundary  61  caused by the connection of the blade mount  47  to the rear boundary  61 . A similar boundary attachment  85  can also be provided for the blade  19 . 
     Furthermore, the rear boundary  61  has a respective rear passage  65  for the products  13  and  15  through which the products  13  and  15  enter the cutting region  17 . The front boundary  59  has a front passage  63  in alignment therewith so that the rear boundary  61  and the front boundary  59  form a frame-like passage for the products  13  and  15  into the cutting region  17  in addition to the peripheral gap  57  for the blades  19  and  21 . A defined guidance of the products  13  and  15  into the cutting region  17  as well as a positioning and a support during the cutting off of a slice or of a piece can thereby be achieved, wherein in particular the rear passage  65  can act as a blade edge and can so-to-say form the end of the product feed  23 . 
     As, for example,  FIGS.  5 A and  5 B  show, the blades  19  and  21  cover the maximum clearance of the passages  63  and  65  so that the blades  19  and  21  are at all times during a cut supported and guided at both sides by the rear boundary  61  and the front boundary  59  both at the ends held by the blade mounts  45  and  47  and at the blade tips  93 . The blade tips  93  are thus never free in the passages  63  or  65  so that forces acting on the blades  19  and  21  in the feed direction Z can always be led off at both sides to the boundaries  59  and  61 . 
     Whereas the blades  19  and  21  in  FIG.  5 A  are arranged offset from one another in the radial direction with respect to their axes of rotation such that the paths described by the blades  19  and  21  during a rotation do not overlap, provision can also be made that the blades  19  and  21  revolve in cutting planes S offset in parallel from one another and can at least partly overlap, in particular with their blade tips  93 , during a rotation. Accordingly, in some embodiments, the blades  19  and  21  can be arranged with a smaller spacing from one another in the radial direction to be able to achieve a design of the cutting apparatus  11  that is as narrow as possible. 
     REFERENCE NUMERAL LIST 
     
         
           11  cutting apparatus 
           13  first product 
           15  second product 
           17  cutting region 
           19  first blade 
           21  second blade 
           23  product feed 
           25  first conveying means 
           27  second conveying means 
           28  support structure 
           29  frame 
           31  center support 
           33  base part 
           35  first mandrel 
           37  second mandrel 
           39  first drive 
           41  second drive 
           43  conveyor belt 
           45  first blade mount 
           47  second blade mount 
           49  knife blade 
           51  blade edge 
           53  control device 
           55  blade guide 
           57  peripheral gap 
           59  front boundary 
           61  rear boundary 
           63  front passage 
           65  rear passage 
           67  portioning region 
           71  conveying device arranged downstream 
           73  conveyor belt 
           75  product holder 
           77  press 
           79  distribution and/or sorting device 
           81  switch cabinet 
           83  feed 
           85  boundary attachment 
           87  processing line 
           89  introduction section 
           91  introduction device 
           93  blade tip 
           95  guide of the product holder 
         S cutting plane 
         Z feed direction