EP2082854A1 - Separating device for food products - Google Patents
Separating device for food products Download PDFInfo
- Publication number
- EP2082854A1 EP2082854A1 EP09001156A EP09001156A EP2082854A1 EP 2082854 A1 EP2082854 A1 EP 2082854A1 EP 09001156 A EP09001156 A EP 09001156A EP 09001156 A EP09001156 A EP 09001156A EP 2082854 A1 EP2082854 A1 EP 2082854A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- separating device
- separating
- outer blades
- cutting edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
- B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/0006—Cutting members therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
- B26D1/10—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
- B26D1/11—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge with a plurality of cutting members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
- B26D1/30—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut with limited pivotal movement to effect cut
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2614—Means for mounting the cutting member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/0006—Cutting members therefor
- B26D2001/0033—Cutting members therefor assembled from multiple blades
Definitions
- the present invention relates to a separating device for food products of the type comprising a reciprocable separating element.
- FR 2 666 534 describes a cutting device for slicing pieces of meat, such as a turkey breast.
- the known cutting device includes a series of knives in the form of elongated cutting blades, which are arranged in pairs between two frames, wherein pairs of cutting blades move reciprocatingly in opposition to each other at a frequency of 10 - 100 Hz.
- the known cutting device has a number of drawbacks, however.
- One of said drawbacks is the fact that cutting blades adhere to the outer sides of the meat while moving forward and backward when cutting a piece of meat. As a result, at least the cut parts of the meat are pushed in opposite directions as cutting proceeds on account of the reciprocating motion of the cutting blades abutting one another. Because of this, the meat is not only cut but also torn, as it were, so that a neat cut surface is not obtained. In the case of less solid substances, such as dough, pastry, ice-cream, etc, said adhesion effect becomes more pronounced, because the product itself is less solid and can be pulled apart more easily.
- the object of the present invention is to provide a separating device which makes it possible to cut various kinds of food products, among which less solid substances, in such a manner that a clean cut is made, and wherein the orientation and the structure of products having a none too solid structure are at least substantially retained during said cutting.
- a separating device for food products which comprises a separating element with two outer blades which are attached together at an acute angle relative to each other along at least part of their circumferential edges so as to provide a cutting edge, whilst a spacer is provided between at least part of said outer blades, which spacer fills the space between the two outer blades only partially, and drive means for reciprocating the outer blades along the cutting edge at a frequency in the 150 - 10,000 Hz range.
- the separating element reciprocates at a relatively high frequency of 150 - 10,000 Hz, preferably 250 - 5,000 Hz, developing a comparatively high speed relative to the product to be cut, of course, the risk of the food product adhering to the separating element is eliminated, or at least significantly reduced.
- the separating element In order to make it possible for the separating element to reciprocate at such a frequency, the separating element must be as light as possible.
- the separating element is therefore formed by attaching two outer blades together along the cutting edge, and having said outer blades diverge slightly conically from said cutting edge, with the spacer holding the outer blades spaced apart at a location some distance away from the cutting edge. To keep the weight relatively low, the spacer fills only part of the space between the two outer blades.
- the blades of the separating element are preferably made of a metal. Furthermore, said blades preferably have a thickness in the 100-150 ⁇ m range. Because the outer blades are preferably designed for minimum weight, the spacer can impart the required stiffness to the separating element. The object aimed at can thus be accomplished with a separating device according to the present invention.
- the outer blades are arranged with their circumferential edges staggered relative to each other.
- the circumferential edge of one of the two outer blades lies within the circumferential edge of the other outer blade, for example at a distance of 0.5-3 mm from said circumferential edge.
- the cutting edge of the separating element is thus formed by the circumferential edge of the outer blade that extends furthest and thus projects beyond the other outer blade. Said further extending outer blade can thus form a cutting means which is thinner at the cutting edge.
- such an embodiment makes it possible to weld the outer blades together in a reliable manner near the circumferential edges, for example by laser welding.
- a cutting element may furthermore be provided between the two circumferential edges, which cutting element forms the actual cutting edge.
- the material of the outer blades and the material of the cutting edge may be selected with a view to optimising the function of the element in question.
- the cutting edge may form part of the spacer or be connected thereto.
- the outer blades are attached together at least near the cutting edge.
- a very good cutting result is obtained if the separating element is arranged for reciprocation about an axis of rotation.
- the separating element thus makes a reciprocating movement about the axis of rotation, with the cutting edge provided on the side remote from the axis of rotation.
- the cutting edge has a curved shape.
- Said curved shape may extend substantially along a circular arc, with the axis of rotation as its centre, at least in the case of a separating element that reciprocates about an axis of rotation.
- a very good cutting result is obtained if the side of the cutting edge that forms the leading edge during a cutting movement is located closer to the axis of rotation than a trailing part of the cutting edge.
- the opposing ends of the cutting edge form a leading end, whilst the central portion of the cutting edge forms the trailing part of the cutting edge.
- control means are provided for controlling the frequency at which the separating element can be reciprocated.
- At least one of the outer blades may be provided with a textured surface on the side remote from the spacer.
- Said textured surface may be a hydrophilic or a hydrophobic surface, depending on the products to be cut.
- the cutting result can be improved even further if the separating element is provided with a fluid inlet for supplying fluid to the interior of the separating element and with fluid outlets. In this way it is possible to supply a fluid between the cut surfaces of the product being cut during a cutting operation by the separating element. In the following paragraphs it will become clear how this can lead to a better cutting result.
- a fluid film can be applied between said at least one outer blade and the cut surface of a cut part of a food product to be cut. It is possible, of course, to provide both outer blades with fluid discharge means, so that fluid can be supplied during the cutting operation between the separating element and the two cut surfaces of cut parts of the food product to be cut.
- the fluid may have several functions. Thus it is for example possible to have moisture, for example water, trickle from the separating element in small quantities during the cutting operation, so that a film of liquid, for example water, is provided between an outer blade and the corresponding cut surface of the product to be cut.
- a comparatively hot or cold fluid may flow through the separating element for or heating or cooling, as the case may be, the separating element. Heating, for example, can facilitate cutting through ice cream. Cooling the separating element may result in condensate precipitating on the separating element, which has the same effect as having water trickle through the outer blades.
- the spacer may be provided with at least one channel for carrying fluid from the fluid inlet to the fluid outlet openings.
- said fluid discharge means may at least partially be provided at a circumferential edge of the separating element remote from the cutting edge of the separating element.
- a fluid can be left behind at a so-called trailing end between the separated parts of a (partially) cut product during a cutting movement.
- the device preferably comprises a counterweight, which reciprocates in opposition to the separating element.
- the object of the counterweight is to keep the separating device as stable as possible in use. As a result, the frequency of the reciprocating motion can be further increased, whilst the risk of the separating device being exposed to substantial vibration as a result of reaching an eigenfrequency is strongly reduced in comparison with devices that are not provided with a counterweight.
- heating means are provided for heating at least the outer blades of the separating element.
- Heating means may be used to facilitate cutting by means of the separating element, for example when the separating element can also cause the products to melt, as is for example the case with ice cream and other dairy products. Because the product (partially) melts along the cut surface, it is possible to realise an even neater finish of the cut surface with certain products.
- the heating means preferably comprise an electrical heating element. Electrical heating elements are easy to install and they are not very prone to malfunction.
- the length of the cutting edge preferably ranges between 15 and 150 mm, more preferably between 25 and 100 mm.
- a separating element having such a cutting edge has the right dimensions for easily cutting most food products.
- the outer blades of the separating element may be provided in such a manner in the separating device that they can be reciprocated in opposition to each other along the cutting edge.
- the separating device preferably comprises a support surface for a product to be separated, above which support surface the separating element is mounted for reciprocating motion. This makes it possible to adjust the positions of the separating element and a product present on the support surface relative to each other by means of the device. A correct position of a product to be cut relative to the separating element (or conversely) makes it possible to optimise the cutting process.
- the support surface forms part of a conveyor. This makes it possible for the conveyor to move a product to be cut in the direction of and past the operative separating element.
- the present invention relates to a separating element for use in a separating device according to the first aspect of the invention, comprising two outer blades, which are attached together at an acute angle relative to each other along at least part of their circumferential edges so as to provide a cutting edge, whilst a spacer is provided between at least part of said outer blades, which spacer fills the space between the two outer blades only partially.
- a wedge-shaped connecting element 11 comprising two outer blades 2 (only one of which is shown in figure 1 ) is mounted for reciprocating motion according to the double arrow P from a driving device 3 having an axis of rotation 3a for the cutting blade 2.
- a conveyor belt 4 supplies a piece of pastry 5 having a hard upper crust to a cutting edge 7 of the cutting element 11 in the direction indicated by the arrow T for cutting said crusty pastry along the separation plane 6, which is illustrated in dotted lines in the figure.
- Figure 2 is a side view of the cutting element 11 and the driving device 3 above a conveyor belt 4 shown in figure 1 .
- the cutting element 11 is mounted for reciprocating motion according to the double arrow P, with the cutting edge 7 reciprocating just above the conveyor belt 4 (see the double arrow P).
- Figure 3 is a side view of an alternative embodiment of a cutting element 15 comprising a cutting blade 12 having a serrated cutting edge 17, which is mounted for reciprocating motion according to the double arrow P from a driving device 13.
- Figure 4 is a side view of a cutting element 21 having a cutting blade 22 and a cutting edge 27.
- Figure 4a is a sectional view along the line A-A in figure 4 of the cutting element 21 comprising two cutting blades 22a, 22b, between which a central element 28 is provided, and in which the cutting blades 22a, 22b are provided in such a manner as to define a wedge shape extending from the bottom edge 27 of the central element 28 on either side of the central element 28, with the bottom edge 27 of said central element forming the cutting edge.
- the cutting element 21 is mounted for reciprocating motion about the axis of rotation 23a.
- Figure 4b is a sectional view of the cutting element 21, along the line B-B in figure 4a .
- the cutting element 21 extends from the cutting edge formed by the cutting blades, of which only the cutting blade 22b is shown in figure 4b , to the upper edge of the cutting blades 22 of the cutting element 21.
- the central element 28 of the cutting element 21 thus imparts rigidity to the construction with the outer blades 22a, 22b.
- Figure 4c is a side view of a cutting element 61, which is in large measure comparable to the cutting element 21, with a cutting blade 62 and an alternative cutting edge 67, along the line A-A in figure 4 .
- the cutting element 61 has two cutting blades 62a, 62b, between which a central element 68 is provided, on either side of which central element 68 the cutting blades 62a, 62b are provided.
- the cutting blade 62b is connected to the cutting blade 62a by means of a welded joint, which cutting blade extends slightly further and whose end 67 forms the cutting edge.
- Figure 5a is a side view of a cutting element 31 with a cutting edge 37 and outer blades 32a, 32b (which latter cutting blade is not shown in figure 5a ) and a central element provided with channels 39 between the outer blades 32a, 32b, which are illustrated in dotted lines in figure 5a and which lead to areas provided with perforations 40 on the surface 32a.
- Figure 5b is a cross-sectional view along the line A-A in figure 5a , showing two outer blades 32a, 32b which extend upwards in the shape of a wedge from the cutting edge 37, and a central element 38, through which the channels of figure 5a extend from an inlet connection 41 to the areas provided with the perforations 40 (see figure 5a ) for delivering a fluid to a cut surface as indicated by the arrows F.
- FIG. 6 shows an alternative embodiment of a cutting element 51 in exploded view, in which an insert 62 provided with an inlet opening 61, channels 59 and outlet openings 60 is provided between the cutting blades 52a, 52b in the trailing end of the cutting element 51.
- FIG 1 there is shown a cutting device 1 according to the present invention in which, in use, a driving device 3 drives the cutting element 11 to reciprocate about the axis 3a in the directions indicated by the double arrow P, whilst a piece of crusty pastry 5 is being transported in the direction of the cutting element 11 on the conveyor belt 4.
- a driving device 3 drives the cutting element 11 to reciprocate about the axis 3a in the directions indicated by the double arrow P, whilst a piece of crusty pastry 5 is being transported in the direction of the cutting element 11 on the conveyor belt 4.
- the cutting element 11 comes into contact with the crusty pastry 5, it will cut the crusty pastry 5 along the separation plane 6.
- said range has a lower limit of 1.0 mm.
- said range has an upper limit of 1.5 mm.
- Said lower limit is determined by, among other factors, a desired minimum distance along which the cutting element is to reciprocate through the product to be cut.
- the upper limit is determined by, among other factors, the lower reciprocating frequency and the weight of the cutting element.
- Figure 2 is a side view of the cutting element 11 reciprocating in the direction indicated by the arrow P above the conveyor belt 4. From the shape of the cutting edge 7 of the double-sided cutting element 11 it can be derived that this cutting element is suitable for cutting a food product from two sides.
- Figure 3 shows a cutting element 15, which is driven for reciprocating motion in the direction indicated by the double arrow P by a driving device 13, the cutting edge 17 of the cutting blades 12 of which cutting element being serrated. Because of this, the cutting element is in particular suitable for food products which easily dull the knife, for example poultry containing bones.
- FIG 4 shows another cutting element 21, which is suitable for cutting food products with the cutting edge 27 thereof.
- Said cutting element 21 has a-symmetrical cutting blades 22, with the distance d1 from the axis of rotation 23 to the leading end of the cutting edge 27 being smaller than the distance d2 from the axis of rotation to a central part of the cutting edge 27.
- the cutting element 21 will penetrate further and further into a product, also in the case of a stationary product, upon moving in clockwise direction, seen in figure 4 , about the axis of rotation 23a.
- the cutting edge 27 in fact slides through the products in such an embodiment, with the cutting edge 27 withdrawing from the cut surface during its return movement (in anti-clockwise direction) and making an adequate cutting movement again upon moving in clockwise direction again.
- Figure 4a is a sectional view of the cutting element 21 of figure 4 , along the line A-A therein.
- a central element 28 functions as a spacer and as a support element for the two cutting blades 22a, 22b of the cutting element 21.
- the blades 22a, 22b make direct contact with the bottom edge 27 of the central element 28 so as to form a very sharp, wedge-shaped cutting edge 27.
- Figure 4b is a sectional view along the line B-B in figure 4a , which shows the shape of the central element 28 between the cutting blades 22a, 22b.
- the cutting blade 22b extends beyond the central element 28, where the cutting blade 22b will make contact with the cutting blade 22a (not shown in this figure).
- Figure 4c shows an alternative cross-sectional view along the line A-A in figure 4 of a cutting element 61 which is comparable to the cutting element 21 of figure 4 .
- two cutting blades 62a, 62b are held spaced apart by a central element 68.
- both cutting blades 62a, 62b extend beyond the spacer 68, joining one another at the bottom edge 65 of the cutting blades and 62b.
- the cutting blade 62a extends further than the cutting blade 62b, which is welded to the cutting blade 62a with its end 65.
- the cutting edge 67 is in fact only formed by the circumferential edge of the cutting blade 62.
- Figures 5a and 5b show a cutting element 31 in side view and in sectional view, respectively, in which perforations 40 are present in the cutting blades 32a and 32b on either side of the cutting element 31.
- dotted lines indicate channels for transporting fluid from a fluid inlet connection 41 (see figure 5b ) to the perforations 40.
- the perforations 40 are arranged in such a manner that they are ideally located for a specific product to be cut. The perforations may be provided at different locations for different products.
- the channels 39 extend through the central element 38, which is not shown as such in the drawings for the sake of clarity.
- FIG 6 an alternative embodiment of a cutting element 51 provided with fluid outlet openings 60 is shown in exploded view.
- the insert 62 is disposed between the cutting blades 52a and 52b, with the perforations or outlet openings 60 terminating at the rear side of the cutting element 51.
- fluid can be passed from the inlet connection 61, through the channels 59 in the insert 62 and through the outlet openings 60 in the direction indicated by the arrows F.
- the fluid will not be introduced between the cut surfaces of a partially cut product until the cutting element 51 has passed that part of the food product. Consequently, this embodiment is suitable only for applying a film between the cut surfaces while being less suitable for reducing the amount of friction between the cutting blades 52a, 52b and the food product.
Abstract
Description
- The present invention, according to a first aspect thereof, relates to a separating device for food products of the type comprising a reciprocable separating element.
-
FR 2 666 534 - The known cutting device has a number of drawbacks, however. One of said drawbacks is the fact that cutting blades adhere to the outer sides of the meat while moving forward and backward when cutting a piece of meat. As a result, at least the cut parts of the meat are pushed in opposite directions as cutting proceeds on account of the reciprocating motion of the cutting blades abutting one another. Because of this, the meat is not only cut but also torn, as it were, so that a neat cut surface is not obtained. In the case of less solid substances, such as dough, pastry, ice-cream, etc, said adhesion effect becomes more pronounced, because the product itself is less solid and can be pulled apart more easily. If cutting such a product by means of the known cutting device would be possible at all, there would even be a chance that the structure of halves of the cut part of the food product would be disturbed to such an extent that the cut product would no longer look appetizing. From a commercial point of view this is disadvantageous, of course, because the way food products look is a major factor in a consumer's decision to buy a product.
- The object of the present invention is to provide a separating device which makes it possible to cut various kinds of food products, among which less solid substances, in such a manner that a clean cut is made, and wherein the orientation and the structure of products having a none too solid structure are at least substantially retained during said cutting. This object is accomplished by the present invention in that it provides a separating device for food products which comprises a separating element with two outer blades which are attached together at an acute angle relative to each other along at least part of their circumferential edges so as to provide a cutting edge, whilst a spacer is provided between at least part of said outer blades, which spacer fills the space between the two outer blades only partially, and drive means for reciprocating the outer blades along the cutting edge at a frequency in the 150 - 10,000 Hz range. Since the separating element reciprocates at a relatively high frequency of 150 - 10,000 Hz, preferably 250 - 5,000 Hz, developing a comparatively high speed relative to the product to be cut, of course, the risk of the food product adhering to the separating element is eliminated, or at least significantly reduced. In order to make it possible for the separating element to reciprocate at such a frequency, the separating element must be as light as possible. The separating element is therefore formed by attaching two outer blades together along the cutting edge, and having said outer blades diverge slightly conically from said cutting edge, with the spacer holding the outer blades spaced apart at a location some distance away from the cutting edge. To keep the weight relatively low, the spacer fills only part of the space between the two outer blades. The blades of the separating element are preferably made of a metal. Furthermore, said blades preferably have a thickness in the 100-150 µm range. Because the outer blades are preferably designed for minimum weight, the spacer can impart the required stiffness to the separating element. The object aimed at can thus be accomplished with a separating device according to the present invention.
- In a preferred embodiment of the present invention, the outer blades are arranged with their circumferential edges staggered relative to each other. The circumferential edge of one of the two outer blades lies within the circumferential edge of the other outer blade, for example at a distance of 0.5-3 mm from said circumferential edge. The cutting edge of the separating element is thus formed by the circumferential edge of the outer blade that extends furthest and thus projects beyond the other outer blade. Said further extending outer blade can thus form a cutting means which is thinner at the cutting edge. In addition, such an embodiment makes it possible to weld the outer blades together in a reliable manner near the circumferential edges, for example by laser welding.
- A cutting element may furthermore be provided between the two circumferential edges, which cutting element forms the actual cutting edge. The material of the outer blades and the material of the cutting edge may be selected with a view to optimising the function of the element in question. The cutting edge may form part of the spacer or be connected thereto.
- With a view to forming a sharp cutting edge it is preferable if the outer blades are attached together at least near the cutting edge.
- A very good cutting result is obtained if the separating element is arranged for reciprocation about an axis of rotation. The separating element thus makes a reciprocating movement about the axis of rotation, with the cutting edge provided on the side remote from the axis of rotation.
- In order to have such a cutting device move smoothly through a food product, it is preferable if the cutting edge has a curved shape. Said curved shape may extend substantially along a circular arc, with the axis of rotation as its centre, at least in the case of a separating element that reciprocates about an axis of rotation. A very good cutting result is obtained if the side of the cutting edge that forms the leading edge during a cutting movement is located closer to the axis of rotation than a trailing part of the cutting edge. In the case of a cutting element which is capable of two-sided cutting, the opposing ends of the cutting edge form a leading end, whilst the central portion of the cutting edge forms the trailing part of the cutting edge.
- In order to be able to adapt the separating device for use with various products to be cut, it is preferable if control means are provided for controlling the frequency at which the separating element can be reciprocated.
- In order to further reduce the resistance experienced by the outer blades during a cutting movement, and thus the risk of the food products adhering to the outer blades of the separating element during said cutting, at least one of the outer blades may be provided with a textured surface on the side remote from the spacer. Said textured surface may be a hydrophilic or a hydrophobic surface, depending on the products to be cut.
- The cutting result can be improved even further if the separating element is provided with a fluid inlet for supplying fluid to the interior of the separating element and with fluid outlets. In this way it is possible to supply a fluid between the cut surfaces of the product being cut during a cutting operation by the separating element. In the following paragraphs it will become clear how this can lead to a better cutting result.
- If the fluid discharge means are at least partially provided in at least one of the two outer blades, a fluid film can be applied between said at least one outer blade and the cut surface of a cut part of a food product to be cut. It is possible, of course, to provide both outer blades with fluid discharge means, so that fluid can be supplied during the cutting operation between the separating element and the two cut surfaces of cut parts of the food product to be cut. The fluid may have several functions. Thus it is for example possible to have moisture, for example water, trickle from the separating element in small quantities during the cutting operation, so that a film of liquid, for example water, is provided between an outer blade and the corresponding cut surface of the product to be cut. It is known, for example, that bread dough will not adhere to a surface, in this case an outer blade, when a film of water is present between said surface and the dough. Moreover, the two cut surfaces of a dough product will not adhere together again after being cut, on account of the film of water that is present therebetween, for example because said film of water was left behind between two opposing cut surfaces by the separating element. Furthermore, a comparatively hot or cold fluid may flow through the separating element for or heating or cooling, as the case may be, the separating element. Heating, for example, can facilitate cutting through ice cream. Cooling the separating element may result in condensate precipitating on the separating element, which has the same effect as having water trickle through the outer blades.
- With a view to transporting fluid to the fluid discharge means, the spacer may be provided with at least one channel for carrying fluid from the fluid inlet to the fluid outlet openings.
- Alternatively, or in addition thereto, said fluid discharge means may at least partially be provided at a circumferential edge of the separating element remote from the cutting edge of the separating element. Thus, a fluid can be left behind at a so-called trailing end between the separated parts of a (partially) cut product during a cutting movement.
- The device preferably comprises a counterweight, which reciprocates in opposition to the separating element. The object of the counterweight is to keep the separating device as stable as possible in use. As a result, the frequency of the reciprocating motion can be further increased, whilst the risk of the separating device being exposed to substantial vibration as a result of reaching an eigenfrequency is strongly reduced in comparison with devices that are not provided with a counterweight.
- In a preferred embodiment of the present invention, heating means are provided for heating at least the outer blades of the separating element. Heating means may be used to facilitate cutting by means of the separating element, for example when the separating element can also cause the products to melt, as is for example the case with ice cream and other dairy products. Because the product (partially) melts along the cut surface, it is possible to realise an even neater finish of the cut surface with certain products.
- The heating means preferably comprise an electrical heating element. Electrical heating elements are easy to install and they are not very prone to malfunction.
- The length of the cutting edge preferably ranges between 15 and 150 mm, more preferably between 25 and 100 mm. A separating element having such a cutting edge has the right dimensions for easily cutting most food products.
- To provide a separating device in which the cutting operation is aided by the movement relative to each other of the outer blades of the separating element, the outer blades of the separating element may be provided in such a manner in the separating device that they can be reciprocated in opposition to each other along the cutting edge.
- The separating device according to the present invention preferably comprises a support surface for a product to be separated, above which support surface the separating element is mounted for reciprocating motion. This makes it possible to adjust the positions of the separating element and a product present on the support surface relative to each other by means of the device. A correct position of a product to be cut relative to the separating element (or conversely) makes it possible to optimise the cutting process.
- It is preferable in that regard if the support surface forms part of a conveyor. This makes it possible for the conveyor to move a product to be cut in the direction of and past the operative separating element.
- According to the second aspect, the present invention relates to a separating element for use in a separating device according to the first aspect of the invention, comprising two outer blades, which are attached together at an acute angle relative to each other along at least part of their circumferential edges so as to provide a cutting edge, whilst a spacer is provided between at least part of said outer blades, which spacer fills the space between the two outer blades only partially. The advantages of such a method correspond to the advantages of the separating device according to the first aspect of the present invention.
- The present invention will be explained in more detail hereinafter by means of a description of an exemplary embodiment of the present invention, in which reference is made to the appended drawings, in which:
-
Figure 1 is a perspective view of a cutting device according to the present invention; -
Figure 2 is a side view of a part of the separating device offigure 1 ; -
Figure 3 shows an alternative embodiment of a separating element for use in the present invention; -
Figure 4 shows an embodiment of yet another separating element for use in the present invention; -
Figure 4a is a cross-sectional view of the separating element along the line A-A infigure 4 ; -
Figure 4b is a sectional view of the separating element offigure 4 , along the line B-B infigure 4a ; -
Figure 4c is a cross-sectional view of an alternative embodiment of a separating element along the line A-A infigure 4 ; -
Figure 5a is a side view of a separating element having a perforated outer blade; -
Figure 5b is a sectional view of the separating element offigure 5a along the line A-A; and -
Figure 6 shows the separating element provided with fluid outlet openings in a trailing edge. - Referring to
figure 1 , a part of a cutting device 1 according to the present invention is shown. A wedge-shaped connectingelement 11 comprising two outer blades 2 (only one of which is shown infigure 1 ) is mounted for reciprocating motion according to the double arrow P from adriving device 3 having an axis ofrotation 3a for thecutting blade 2. Aconveyor belt 4 supplies a piece ofpastry 5 having a hard upper crust to acutting edge 7 of the cuttingelement 11 in the direction indicated by the arrow T for cutting said crusty pastry along theseparation plane 6, which is illustrated in dotted lines in the figure. As long as the product has not been cut, there will be no separation plane, of course, so that an imaginary plane is meant along which the product is to be cut. -
Figure 2 is a side view of the cuttingelement 11 and thedriving device 3 above aconveyor belt 4 shown infigure 1 . The cuttingelement 11 is mounted for reciprocating motion according to the double arrow P, with thecutting edge 7 reciprocating just above the conveyor belt 4 (see the double arrow P). -
Figure 3 is a side view of an alternative embodiment of a cuttingelement 15 comprising acutting blade 12 having aserrated cutting edge 17, which is mounted for reciprocating motion according to the double arrow P from a drivingdevice 13. -
Figure 4 is a side view of a cuttingelement 21 having acutting blade 22 and acutting edge 27.Figure 4a is a sectional view along the line A-A infigure 4 of the cuttingelement 21 comprising twocutting blades central element 28 is provided, and in which thecutting blades bottom edge 27 of thecentral element 28 on either side of thecentral element 28, with thebottom edge 27 of said central element forming the cutting edge. The cuttingelement 21 is mounted for reciprocating motion about the axis ofrotation 23a. -
Figure 4b is a sectional view of the cuttingelement 21, along the line B-B infigure 4a . The cuttingelement 21 extends from the cutting edge formed by the cutting blades, of which only thecutting blade 22b is shown infigure 4b , to the upper edge of thecutting blades 22 of the cuttingelement 21. Thecentral element 28 of the cuttingelement 21 thus imparts rigidity to the construction with theouter blades -
Figure 4c is a side view of a cuttingelement 61, which is in large measure comparable to the cuttingelement 21, with acutting blade 62 and analternative cutting edge 67, along the line A-A infigure 4 . The cuttingelement 61 has twocutting blades central element 68 is provided, on either side of whichcentral element 68 thecutting blades end 65 of thecutting blade 62b, thecutting blade 62b is connected to thecutting blade 62a by means of a welded joint, which cutting blade extends slightly further and whoseend 67 forms the cutting edge. -
Figure 5a is a side view of a cuttingelement 31 with acutting edge 37 andouter blades figure 5a ) and a central element provided withchannels 39 between theouter blades figure 5a and which lead to areas provided withperforations 40 on thesurface 32a. -
Figure 5b is a cross-sectional view along the line A-A infigure 5a , showing twoouter blades cutting edge 37, and acentral element 38, through which the channels offigure 5a extend from aninlet connection 41 to the areas provided with the perforations 40 (seefigure 5a ) for delivering a fluid to a cut surface as indicated by the arrows F. -
Figure 6 , to conclude, shows an alternative embodiment of a cuttingelement 51 in exploded view, in which aninsert 62 provided with aninlet opening 61,channels 59 andoutlet openings 60 is provided between thecutting blades element 51. - Now referring to
figure 1 , there is shown a cutting device 1 according to the present invention in which, in use, adriving device 3 drives the cuttingelement 11 to reciprocate about theaxis 3a in the directions indicated by the double arrow P, whilst a piece ofcrusty pastry 5 is being transported in the direction of the cuttingelement 11 on theconveyor belt 4. When the cuttingelement 11 comes into contact with thecrusty pastry 5, it will cut thecrusty pastry 5 along theseparation plane 6. This takes place because thesharp cutting edge 7 is reciprocated at a frequency of about 500 Hz and with an amplitude in the 0.25 - 4 mm range. Furthermore preferably, said range has a lower limit of 1.0 mm. Also further preferably, said range has an upper limit of 1.5 mm. Said lower limit is determined by, among other factors, a desired minimum distance along which the cutting element is to reciprocate through the product to be cut. The upper limit is determined by, among other factors, the lower reciprocating frequency and the weight of the cutting element. As a result of the high frequency at which the cuttingelement 11 comprising thecutting blades 2 and thecutting edge 7 cuts through thecrusty pastry 5, the pastry will not adhere to thecutting blades 2 of the cuttingelement 11 on either side of theseparation plane 6, resulting in neatly cutpastry 5. -
Figure 2 is a side view of the cuttingelement 11 reciprocating in the direction indicated by the arrow P above theconveyor belt 4. From the shape of thecutting edge 7 of the double-sided cutting element 11 it can be derived that this cutting element is suitable for cutting a food product from two sides. -
Figure 3 shows a cuttingelement 15, which is driven for reciprocating motion in the direction indicated by the double arrow P by a drivingdevice 13, thecutting edge 17 of thecutting blades 12 of which cutting element being serrated. Because of this, the cutting element is in particular suitable for food products which easily dull the knife, for example poultry containing bones. -
Figure 4 shows another cuttingelement 21, which is suitable for cutting food products with thecutting edge 27 thereof. Said cuttingelement 21 hasa-symmetrical cutting blades 22, with the distance d1 from the axis of rotation 23 to the leading end of thecutting edge 27 being smaller than the distance d2 from the axis of rotation to a central part of thecutting edge 27. As a result, the cuttingelement 21 will penetrate further and further into a product, also in the case of a stationary product, upon moving in clockwise direction, seen infigure 4 , about the axis ofrotation 23a. Thecutting edge 27 in fact slides through the products in such an embodiment, with thecutting edge 27 withdrawing from the cut surface during its return movement (in anti-clockwise direction) and making an adequate cutting movement again upon moving in clockwise direction again. -
Figure 4a is a sectional view of the cuttingelement 21 offigure 4 , along the line A-A therein. As said sectional view shows, acentral element 28 functions as a spacer and as a support element for the twocutting blades element 21. At the bottom side of the cuttingelement 21, theblades bottom edge 27 of thecentral element 28 so as to form a very sharp, wedge-shapedcutting edge 27. -
Figure 4b , to conclude, is a sectional view along the line B-B infigure 4a , which shows the shape of thecentral element 28 between thecutting blades central element 28, through which thecutting blade 22b is visible, serve to reduce the weight of the cuttingelement 21 with a view to realising a maximum reciprocating frequency. At the bottom side, thecutting blade 22b extends beyond thecentral element 28, where thecutting blade 22b will make contact with thecutting blade 22a (not shown in this figure). -
Figure 4c shows an alternative cross-sectional view along the line A-A infigure 4 of a cuttingelement 61 which is comparable to the cuttingelement 21 offigure 4 . In this embodiment, too, twocutting blades central element 68. In contrast to the situation infigure 4a , however, in which a bottom edge of thecentral element 28 forms thecutting edge 27, both cuttingblades spacer 68, joining one another at thebottom edge 65 of the cutting blades and 62b. Thecutting blade 62a extends further than thecutting blade 62b, which is welded to thecutting blade 62a with itsend 65. Thus, thecutting edge 67 is in fact only formed by the circumferential edge of thecutting blade 62. -
Figures 5a and 5b show a cuttingelement 31 in side view and in sectional view, respectively, in which perforations 40 are present in thecutting blades element 31. Infigure 5 , dotted lines indicate channels for transporting fluid from a fluid inlet connection 41 (seefigure 5b ) to theperforations 40. Theperforations 40 are arranged in such a manner that they are ideally located for a specific product to be cut. The perforations may be provided at different locations for different products. Thechannels 39 extend through thecentral element 38, which is not shown as such in the drawings for the sake of clarity. Asfigure 5b shows, fluid flows from the twocutting blades element 31. - In
figure 6 , an alternative embodiment of a cuttingelement 51 provided withfluid outlet openings 60 is shown in exploded view. In the assembled condition, theinsert 62 is disposed between thecutting blades outlet openings 60 terminating at the rear side of the cuttingelement 51. As such, fluid can be passed from theinlet connection 61, through thechannels 59 in theinsert 62 and through theoutlet openings 60 in the direction indicated by the arrows F. In this embodiment, the fluid will not be introduced between the cut surfaces of a partially cut product until the cuttingelement 51 has passed that part of the food product. Consequently, this embodiment is suitable only for applying a film between the cut surfaces while being less suitable for reducing the amount of friction between thecutting blades - Only a few embodiments of a cutting device or cutting element according to the present invention have been shown and discussed in the figures and the description. It will be understood, however, that various modifications to these embodiments may be conceived by those skilled in the art, which modifications all fall within the scope of the present patent application, which is defined by the appended claims. The figures and the description herein are only meant by way of illustration. Thus it is possible, for example, to provide the separating device with coupling means, for example quick-action coupling means, for (rapidly) exchanging a cutting element in adaptation to different kinds of products to be cut.
Claims (15)
- A separating device for food products, comprising a separating element with two outer blades which are attached together at an acute angle relative to each other along at least part of their circumferential edges so as to provide a cutting edge, whilst a spacer is provided between at least part of said outer blades, which spacer fills the space between the two outer blades only partially, and drive means for reciprocating the outer blades along the cutting edge at a frequency in the 150 - 10,000 Hz range.
- A separating device according to claim 1, characterised in that the outer blades are arranged with their circumferential edges staggered relative to each other.
- A separating device according to claim 1, characterised in that a cutting element is provided between the two circumferential edges, which cutting element forms the actual cutting edge.
- A separating device according to claim 1 or 2, characterised in that the outer blades are attached together at least near the cutting edge.
- A separating device according to one or more of the preceding claims, characterised in that the separating element is arranged for reciprocation about an axis of rotation.
- A separating device according to one or more of the preceding claims, characterised in that at least one of the outer blades is provided with a textured surface on the side remote from the spacer.
- A separating device according to one or more of the preceding claims, characterised in that the separating element is provided with a fluid inlet and with fluid outlets.
- A separating device according to claim 7, characterised in that the fluid discharge means are at least partially provided in at least one of the two outer blades.
- A separating device according to claim 7 or 8, characterised in that the spacer is provided with at least one channel for carrying fluid from the fluid inlet to the fluid outlet openings.
- A separating device according to one or more of the preceding claims, characterised in that the device comprises a counterweight, which reciprocates in opposition to the separating element.
- A separating device according to one or more of the preceding claims, characterised in that heating means are provided for heating at least the outer blades of the separating element.
- A separating device according to one or more of claims 1-3 or 5-11, characterised in that the outer blades of the separating element are provided in such a manner in the separating device that they can be reciprocated in opposition to each other along the cutting edge.
- A separating device according to one or more of the preceding claims, characterised in that the separating device comprises a support surface for a product to be separated, above which support surface the separating element is mounted for reciprocating motion.
- A separating element for use in a separating device according to one or more of the preceding claims, comprising two outer blades, which are attached together at an acute angle relative to each other along at least part of their circumferential edges so as to provide a cutting edge, whilst a spacer is provided between at least part of said outer blades, which spacer fills the space between the two outer blades only partially.
- A method for cutting a food product, wherein a separating device according to one or more of claims 1-19 causes a separating element to reciprocate at a frequency in the 150 - 10,000 Hz range.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1034959A NL1034959C2 (en) | 2008-01-28 | 2008-01-28 | Separation device for food. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2082854A1 true EP2082854A1 (en) | 2009-07-29 |
EP2082854B1 EP2082854B1 (en) | 2019-01-23 |
Family
ID=39720596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09001156.0A Not-in-force EP2082854B1 (en) | 2008-01-28 | 2009-01-28 | Separating device for food products |
Country Status (2)
Country | Link |
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EP (1) | EP2082854B1 (en) |
NL (1) | NL1034959C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009030550A1 (en) * | 2009-06-25 | 2010-12-30 | Weber Maschinenbau Gmbh Breidenbach | cutting blade |
EP2511058A1 (en) * | 2011-04-15 | 2012-10-17 | Weber Maschinenbau GmbH Breidenbach | Method for cutting food |
EP2825354B1 (en) | 2012-03-14 | 2017-09-06 | GEA Food Solutions Germany GmbH | Cutting blade with means for producing an airstream |
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DE9015344U1 (en) * | 1990-11-08 | 1991-01-17 | Joh. Friedrich Ohler Gmbh & Co, 5630 Remscheid, De | |
FR2666534A1 (en) | 1990-09-12 | 1992-03-13 | Sy Ind Ste Civile | Device for cutting a block of meat into slices |
JPH0523996A (en) * | 1991-07-18 | 1993-02-02 | Kaijo Corp | Ultrasonic cutting device |
EP0540495A1 (en) * | 1991-10-30 | 1993-05-05 | GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft | Method of cutting workpieces made from fibre reinforced plastic |
JPH05329795A (en) * | 1992-05-26 | 1993-12-14 | Kubota Corp | Cutting device for uncured plate |
GB2282559A (en) * | 1993-10-07 | 1995-04-12 | Rawson Francis F H | Ultrasonic cutting device |
DE4440582C1 (en) * | 1994-11-14 | 1996-07-11 | Joerg Schumann | Method and appliance for chopping up cardboard, esp. corrugated paper |
DE29610901U1 (en) * | 1996-06-21 | 1996-09-05 | Ortlepp Wolfgang | Knives with spaced apart, resilient cutting surfaces with a common cutting edge or cutting blade |
JPH09216195A (en) * | 1996-02-09 | 1997-08-19 | Sonotetsuku:Kk | Knife holder for ultrasonic cutter |
US20020181919A1 (en) * | 2001-05-28 | 2002-12-05 | Nobuyuki Yasuda | Apparatus and method for cutting plastic optical fiber |
WO2007032346A1 (en) * | 2005-09-12 | 2007-03-22 | Kazumasa Ohnishi | Cutter and cutting apparatus provided with disc-shaped cutting blade |
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2008
- 2008-01-28 NL NL1034959A patent/NL1034959C2/en not_active IP Right Cessation
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US3853027A (en) * | 1972-06-06 | 1974-12-10 | Foerenade Fabriksverken | Apparatus for cutting resilient porous material |
JPS6253688A (en) * | 1985-08-31 | 1987-03-09 | 吉川 英敏 | Electromagnetic vibration blade |
FR2666534A1 (en) | 1990-09-12 | 1992-03-13 | Sy Ind Ste Civile | Device for cutting a block of meat into slices |
DE9015344U1 (en) * | 1990-11-08 | 1991-01-17 | Joh. Friedrich Ohler Gmbh & Co, 5630 Remscheid, De | |
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DE29610901U1 (en) * | 1996-06-21 | 1996-09-05 | Ortlepp Wolfgang | Knives with spaced apart, resilient cutting surfaces with a common cutting edge or cutting blade |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102009030550A1 (en) * | 2009-06-25 | 2010-12-30 | Weber Maschinenbau Gmbh Breidenbach | cutting blade |
EP2511058A1 (en) * | 2011-04-15 | 2012-10-17 | Weber Maschinenbau GmbH Breidenbach | Method for cutting food |
DE102011017227A1 (en) * | 2011-04-15 | 2012-10-18 | Weber Maschinenbau Gmbh Breidenbach | Process for slicing food products |
US8991289B2 (en) | 2011-04-15 | 2015-03-31 | Weber Maschinenbau Gmbh Breidenbach | Method for the slicing of food products |
EP2825354B1 (en) | 2012-03-14 | 2017-09-06 | GEA Food Solutions Germany GmbH | Cutting blade with means for producing an airstream |
EP2825354B2 (en) † | 2012-03-14 | 2020-12-02 | GEA Food Solutions Germany GmbH | Cutting blade with means for producing an airstream |
Also Published As
Publication number | Publication date |
---|---|
NL1034959C2 (en) | 2009-07-30 |
EP2082854B1 (en) | 2019-01-23 |
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