CA1305396C - Raw food cutter - Google Patents
Raw food cutterInfo
- Publication number
- CA1305396C CA1305396C CA000544749A CA544749A CA1305396C CA 1305396 C CA1305396 C CA 1305396C CA 000544749 A CA000544749 A CA 000544749A CA 544749 A CA544749 A CA 544749A CA 1305396 C CA1305396 C CA 1305396C
- Authority
- CA
- Canada
- Prior art keywords
- transverse webs
- raw food
- base plate
- webs
- knives
- 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.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J17/00—Household peeling, stringing, or paring implements or machines
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/25—Devices for grating
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Food-Manufacturing Devices (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Telephonic Communication Services (AREA)
- Lubricants (AREA)
Abstract
RAW FOOD CUTTER
ABSTRACT
Raw food cutter for cutting raw food into strips, with a base plate on whose top surface are provided two butting faces located in one plane and between which is arranged at least one knife row running substantially at right angles to the cutting direction and whose knives with approximately inverted U-shaped cutting edges project heightwise over the butting faces and are open towards the underside of the base plate, the underside of the knife being at least partly inclined towards the base plate, the knife row being constructed in arcuate meander-like manner and preferably in one piece from a thin metal band, accompanied by the formation of upper and lower transverse webs and lateral webs linking them and being fixed with the lower transverse webs in the base plate, the lower transverse webs are located below or level. with the butting faces, whilst the upper transverse webs project beyond the butting faces and, based on the cutting direction, are oriented substantially parallel to the plane of the butting faces and the upper transverse webs are oriented parallel to the plane of the butting faces for forming double-edged knives and, based on the cutting direction, are centrally dented towards the base plate, characterized in that on the base plate level with the knife rows are formed openings bounded by longitudinal webs and which are located below the upper transverse webs of knives, the lower transverse webs of knives being jointly injection moulded into longitudinal webs of base plate.
ABSTRACT
Raw food cutter for cutting raw food into strips, with a base plate on whose top surface are provided two butting faces located in one plane and between which is arranged at least one knife row running substantially at right angles to the cutting direction and whose knives with approximately inverted U-shaped cutting edges project heightwise over the butting faces and are open towards the underside of the base plate, the underside of the knife being at least partly inclined towards the base plate, the knife row being constructed in arcuate meander-like manner and preferably in one piece from a thin metal band, accompanied by the formation of upper and lower transverse webs and lateral webs linking them and being fixed with the lower transverse webs in the base plate, the lower transverse webs are located below or level. with the butting faces, whilst the upper transverse webs project beyond the butting faces and, based on the cutting direction, are oriented substantially parallel to the plane of the butting faces and the upper transverse webs are oriented parallel to the plane of the butting faces for forming double-edged knives and, based on the cutting direction, are centrally dented towards the base plate, characterized in that on the base plate level with the knife rows are formed openings bounded by longitudinal webs and which are located below the upper transverse webs of knives, the lower transverse webs of knives being jointly injection moulded into longitudinal webs of base plate.
Description
~3(~S;~6 RAW FOOD CUTTER
The invention relates to a raw or uncooked food cutter.
German patent 22 60 358 discloses a raw food cutter in the form of a kitchen grater, which is made from a plastic injection moulding and has a frame with rectangular holes into which pass in the cutting direction teeth curved arcuately downwards from the cutting edge. Further teeth are provided on the back of the kitchen grater. Such a grater can be used for shredding vegetables, fruit, etc. whilst expending relatively little encrgy. The shredded product is largely separated in the form of thin strips or grated and mashed.
Admitted]y the expenditure of energy is much less when using the aforementioned kitchen grater than with the other hitherto known graters, but is still too high in order to shred the product in a drawing movement, i.e. if the cutting edges of the knives are directed downwards.
D~-OS 35 00 ~95 discloses a kitchen appliance for cutting potatoes, particu]arly semi-cooked potatoes, in which there are double-edged plastic knives connected in one piece with the base plate in the form of two successively displaced transverse rows. In this kitchen appliance, the cutting edges of the knives are initially parallel to the cutting direction and are then bent concavely downwards. This kitchen appliance is particularly suitable for producing curl-like potato strips, if the potatoes are semi-cooked beforehand. This kitchen appliance is less satisfactory and requires more energy expenditure 13~53~6 when used for dealing with raw food.
EP-OS 0 189 743 discloses a raw food cutter of the aforementioned type, which has in principle proved completely satisfactory. The problem of the present invention is t~ improve the manufacture and handling of said cutter in such a way that the cutting resistance is further reduced and manufacture is simplified and made less expenslve.
The present invention is a raw food cutter for cutting raw food into strips. It has a base plate on whose top surface are provided two butting surfaces located in one plane, and between which is arranged at least one knife row running substantially at right angles to a longitudinal cutting direction and whose knives, with approximately inverted U-shaped cutting edges, project heightwise over the butting faces and are open towards the underside of the base plate, the underside of the knife being at least partly inclined towards the base plate. The knife rows are constructed in an arcuate meander-like manner in one piece from a thin metal band, accompanied by formation of upper and lower transverse webs and lateral webs linking the upper and lower transverse webs and being fixed with the lower transverse webs in the base plate. The lower trans-verse webs are located below or level with the butting faces. The upper transverse webs project beyond the butting faces and, for forming double-edyed knives, are orientated in alignment with the cutting direction, sub-stantially parallel to the plane of the butting faces. The knives are dented, at a location approximately central along their lo~gitudinal dimension, towards the base plate.
Openings are formed in the base plate level with the knife rows. The openings are located below the upper transverse webs of the knives and are bounded by longitudinal webs, the lower transverse webs of the knives being jointly injection moulded into the longitudinal webs. The metal band from which the knife rows are formed are sharpened at both longitudinal faces.
~3~3~ Ei A ~-sha~ed cross-section is retained over a considerable length of thc cutting process. As a result the cutting forces are significantly reduced compared with conventional kitchen graters.
Instead of being displaced, the material cut is cleanly cut through. Surprisingly there is also no clogging of the base plate free space left under the knives. The substantially parallel arrangcment of the knife cutting edges in fact appears to improve the frce cutting of the individual knives. Apart from simple manufacture by stamping and the priar, t~o-sided, mechanical sharpening, the advantage of construçting the kni~e ro~ frorll a metal band is that the latter can be relatively thin and is e.g. approximately 1/10 mm. This thin cross-section of thc cutting cdges naturally extends over the entire cutting edge len~th and depth, so that during cutting the product i~
not ~ueezed. The significance of tl-is advantage is immediatcly app.llent if it is remembered that the thickness of the lateral . . _ . _ 13~;3~6 ~-el~s must be pressed through the cut material. Despite the use of such a thin meta] band, the enormous stability of the knife is surprising. This is on the one hand apparently due to the meander-]ike construction of the metal band and on the other to the fact that each ].ower transverse web is fixed in the base ~late.
Admittedly German utility model 19 91 402 discloses a domestic cutting appliance for cutting chips or French fries, in which there is a rectangularly wave-like bent knife arranged at right angles to the cutti.ng direction. This knife is fixed to the facing 10ngi.tlldinal strips of the kitchen appliance. However, as a rcsu]t of the knife size and cutting edge thickness, it is not suitable for cutting raw food.
A so-called waffle cutter is also known, in which a wave-like bent knife fitted in sloping manner with respect to the cutti~g di.rection is fixed in the rear bearing plate. However, this cutter also has excessively large knives and cutting edge thicknesses.
As stated hereinbefore, when cutting raw food it is a ~uestion of producing very thin strips. If these strips are to be cut by m-~ans of IJ-shaped knives, the problem arises that the lateral ebs must pass through the vegetable. With the large number of lateral webs necessary for such raw food graters, the cutting edge thickness can be summated to such an extent that not only i.s the cutti.ng resistance increased, but also there is a considerab].e increase in the risk of the already cut strips jamming.
13~53~;
However, problems can occur due to the resulting stability problems of th~ knife row through merely reducing the thickness of the cutting edge. These contradictory re-quirements have been taken into account for the first time by the present invention.
Detailed Descri~tion of a Preferred Embodiment In a preferred embodiment of the invention the raw food cutter is a cutting board. Food is cut into strips by moving the food longitudinally in relation to the board.
The board supports two rows of knives which serve to cut the food into strips as the food is slid along the board or the board is slid over the food. Moving the food longitudi-nally in relation to the board drives the rows of knivesinto the food.
Each row of knives is formed out of a thin metal sheet. The formed metal sheets are attached to the board and positioned over corresponding apertures in the board.
The metal sheets and apertures extend tranversely across the cutting surface (hereinafter referred to as the butting surface) of the board. The metal sheets lie in a plane which is generally parallel to the plane of the butting surface, although slightly recessed below the plane of the butting surface. The tranverse edges of the metal sheets (the edges the food will engage when moved longitudinally in relation to the board) are sharpened so as to provide the cutting edges of the knives. The knives are formed as inverted U-shaped impressions in the metal sheets. That is, the knives are punch-pressed out of the metal sheets as a parallel array of longitudinal downwardly concave channels.
The array of punch-pressed channels is thus disposed above the plane of the butting surface so as to engage food moved along the butting surface. The array is held in place by the remaining non-deformed metal sheet. Each channel is defined by its two sides (each side hereinafter re~erred to as a lateral web) and by its surface disposed uppermost ~3~;3~
above the butting surface (the uppermost surface herein-after referred to as the upper transverse web).
The remaining non-deformed metal sheet forms a lower transverse web between the channels. It extends transversely, in a plane slightly recessed from, and parallel to, the plane of the butting surface, into the sides of the board. The lower tranverse web is anchored by means of anchoring depressions in the web and by means of holes in the web which serve to anchor the web during the plastic injection moulding process by which the board is formed.
Each channel i8 crimped approximately half-way along its length so that a food strip moving through the channel (the food having been cut into strips by the sharpened edges of the metal sheet forming the ends of the channel) encounter a downwardly inclined surface which tends to force the food strip out through the corresponding aperture in the board. Strips cut from the food are thus removed by being forced out through the bottom of the board.
Two parallel rows of channels form the two rows of knives.
13(~
Accordin~ toa prefe~rred embodi.l7lellt, tlle~ upper transverse ~rebs for formins double-edged knives are oriented parallel to thc plane of the butting faces and, based on the cutting direction, are in each case centrally dented or depressed to~-ards the base p].ate. Thus, the cuttinS process takes place l~Tith substantially no additional resistance. The deflection of the cut product by the~ depressions only talces place when it has acquired a certain lengtll, so that to a greater or l.esser e~tent it bends round of its o~ accord. Due to these l`eatures it is easy for the hollsc~ife to Cllt t11e p.10-luct by a reciprocating movement during each strol~e or trave:l. This is not so obvious, because hi.therto the hiSh cutting resistance in the case of raw food graters has led to a relatively poor cutting result during the return movemcnt, i.e. less is cut during the return movement than during the outward movement.
An advantageous deflcction of thc cut strips is ohtaincd in that the depressions of the upper transverse webs are rou~hly triangular, when considered at rigllt angles to the cutting dircctioJI.
Advantaseous].y the de!~ressions end at a distance above the plane~
oi` th( l-uttins iacens, wllich is sufricic~nt for the~ free cutting oI` the kll:iv-~s. ln ~d-l:it~ l, the ~?flec1irl~s forces arc kcl-l very ~r~ t1~ ress~
,~ .~
13(~5;~
An advantageous distancc between the centre of a depression and thc associated cutting edge of a knife corresponds to roughly two to three times the depth of the depression. The distance from the edge of a depression up to the associated, adjacent cutting edge roughly corresponds to the depth of a depression.
As a result of these size ratios the cutting process is particularly advantageous, whilst the distance from the edge Ofa dcpression to the adjacent cutting edge can also be made somcwhat ]arger.
According to a preferred embodiment, the width of an upper transversc web roughly corresponds to that of a lower transverse w(~ 1) .
Preferably according toa further development of the raw food grater, there are two knife rows in succession in the cutting direction and displaced at right angles thereto on the base plate.
Although it is preferred to arrange the knife rows in sloping manner with respect to the cutting direction, the longitudinal extension of the knife extending in the latter, according to an embodiment the knife rows are fitted to the base plate at right anglcs to the cutting direction. Advantageously the base plate is madc from p]astic.
A particularly stable fitting of the knife row to the base plate is obtained if openings bounded by longitudinal webs are provided leve] with the knife rows on the base plate located below the upper transverse webs of the knife, the lower transverse ~31~S;~?6 bs o~ the knife also being injection moulded in the longit~dinal ~-cbs of thc base plate.
The free cutting of the knives is further facilitated in that the openings are made longer than the upper transverse webs of the knivcs and terminate at a distance from the cutting edges of the latter.
A good anchoring of the lower transverse webs in the longitudinal webs of the base plate is broughtabout in that impressions are ma-le on the lower transverse webs for anchoring the latter in t~ p]~stic.
The good anchoring can be further improved in that the depressions are provided with openings for the passage of the plastic. During the in~jection moulding of the raw food cutter, the plastic passes through these openings, which leads to a positive connection between the lower transverse webs of the knife and the base plate.
The anchoring of the lower transverse webs is also improved in that, based on the cutting direction, the impressions are located in the centre of the lower transverse webs.
An embodiment of the invention is described in greater detail hereinafter relative to the drawings, wherein show:
Fig. 1 A perspective plan view of the inventive raw food cutter .
I~ig. 2 A section through a knife row along line II-II of fig. 1.
131~S3~6 ig. 3 A section through a knife row along line III-III of fig. 1.
~ig. 1 shows a raw food cutter 1 for cutting raw food strips.
Cutter 1 comprises a base plate 2, on whose top surface 3 are provided two butting faces 4 and 5 located in one plane. Between butting faces 4, 5 are provided two knife rows 6, 7 displaced reciprocally and at right angles to cutting direction A. Knife rows 6, 7 have knives with U-shaped cutting edges 8, whose height pro~jects over the butting faces 4, 5 and are open towards the underside 9 of base plate 2. The knife underside i9 at least partly inclined towards the base plate (cf. fig. 2).
As can be gathered from fig. 1, the knife rows in each case comprise a thin metal band 10 with a thickness of approximately 1/10 mm. Metal band 10 is bent in meander-like manner, accompanied by the formation of upper transverse webs 11, lower transverse webs 12 and lateral webs 13 interconnecting the same.
As can be clearly gathered from fig. 3, the lower transverse webs are fixed in the base plate and positioned below the butting faces 4, 5. The upper transverse webs 11 project over and beyond butting faces 4, 5 and, based on the cutting direction A, are oriented substantially parallel to the plane of butting faces 4, 5.
As can be gathered from the drawings, knife rows 6, 7 are constructed in doub]e-edged form, the upper transverse webs 11 being centrally provided with dents or depressions 14 directed ~3~3~6 towards the basc plate.
It can be gathered from figs. 2 and 3 that the depressions 14 of the upper transverse webs 11 are roughly triangular, considered at ri.ght angles to cutting direction A. Depressions 14 terminate at a distance above the plane of butting faces 4 and 5.
As can be clearly gathered from fig. 2, the distance between the centre of a depression 14 and the associating cutting edge ~ of a knife is roughl.y two to three times the depth of le~ress;.on 1ll. Measured from the edge of a depression 14, the d-ist~nce to the associated adjacent cutting edge 8 roughly corresponds to the depth of a depression.
As can be gathered from fig~ 1 the width of an upper transverse web 11 roughly corresponds to that of a lower transverse web 12.
Although the knife rows 6, 7 could also be inclined to the cutting direction A, in this embodiment they are fitted to the base plate 2 at ri.ght angles to cutting direct,ion A~
Base plate 2 is made from plastic. ~he metal bands 10 from w'hi.ch I,he knife rows 6, 7 are made are also injection moulded into the base plate 2 of the raw food cutter 1. For this purpose on base plate 2 and level with the knife rows 6, 7 are provi,ded openings 16 bounded by longitudinal webs 15 and which are located below the upper transverse webs 11 of knives 6, 7.
The lower transverse webs 12 of knives 6, 7 are jointly injection moulded in to the longitudinal webs 15 of base plate 2.
13~S;~6 Impressions 17 are made in the transverse webs for the better anchoring of the lower transverse webs 12 in the longitudinal wcbs 15 of base plate 2.
To ensure even better anchoring of the transverse webs of the knives in the longitudinal webs of the base plate, the impressions 17 are provided with openings 18 through which the plastic can pass during injection moulding. Based on cutting direction A, impressions 17 and also openings 18 are located in the centre of the lower transverse webs 12.
As can be particularly well gathered from fig. 2, openings 16 are longer than the upper transverse webs 11 of knives 6, 7 and terminate at a distance from the knife cutting edges 8. This cannot be gathered as clearly from fig. 1.
The invention functions as follows. The raw food cutter enables vegetables to be cut into very fine strips without any pulping or other damage occurring.
At the start of the shredding process, the material for cutting is placed on the upper butting face 4 and is then guided against the first knife row 6. When the product strikes against the cutting edge 8 of the first knife row 6, the upper transverse webs 11 and the associated lateral webs 13 of knife row 6 pass into the product without bending down the already cut part.
Only when the leading edge of the cut material reaches depression 14 is the cut strip deflected downwards with a relatively long ~53~6 1 ~v- r al^m of approximately two to threc timcs thc depth of deprcssion 1~l. 1`his deflection is sufficient for the cut strips t o pass througll openinss 16 in such a way that they pass out ol` the openinss 16 on the underside of base plate 2.
After passing through the first knife row 6, the cut material encounters the second knife row 7, which is transversely d-isplaced with respect to the first knife row 5. The cut product parts left behind are now cut in the form of strips as described hereinbefore.
~(0 I;lle Cllt product is located on the lower butting face 5, it is oncc again brought against knife ro~- 7 by a pulling movement oi` the arm, but this J10~' takes place in the opposite direction.
As a result of the extremely small cutting resistance, the elltire surface of the cut product remains on the butting face 5, -~ithout any tilting occurring. This is not so obvious, because as a result of the unfavourable force application to the cut product cluring the upward pulling movement, even in the case of a mocleratr rcsist~ncc on its leading edge, said product would tcnd to lift from the butting face 5, but this problem does not occur hcrc.
As thc strips cut during the outward movement have alrcady dropT)ed out of the openings 16, the latter arc now free for the passage of the strips cut during the return movement.
Aft~-~r T)aCsins kllife ro~ 7, in the snme ~.-ay as described ~3(~539!6 hereinbefore further strips are cut from the cut product on knife row 6.
The inventive features disclosed in the abo~e description, the drawings and claims can be essential to the realization of the di.fferent embodiments of the invention, either singly or in random combination.
~3J~3~
LIST OF REFERENCE NUMERALS
1 Raw food cutter 2 Base plate 3 Top surface 4/5 Butting face 6/7 Knife row 8 Cutting edge 9 Underside ]O Metal band 11/12 Transverse webs :L3 ~teral webs 14 Depression Longitudi~l webs 16 Openings ]7 Impressions 18 Openings A Cutting directi.on
The invention relates to a raw or uncooked food cutter.
German patent 22 60 358 discloses a raw food cutter in the form of a kitchen grater, which is made from a plastic injection moulding and has a frame with rectangular holes into which pass in the cutting direction teeth curved arcuately downwards from the cutting edge. Further teeth are provided on the back of the kitchen grater. Such a grater can be used for shredding vegetables, fruit, etc. whilst expending relatively little encrgy. The shredded product is largely separated in the form of thin strips or grated and mashed.
Admitted]y the expenditure of energy is much less when using the aforementioned kitchen grater than with the other hitherto known graters, but is still too high in order to shred the product in a drawing movement, i.e. if the cutting edges of the knives are directed downwards.
D~-OS 35 00 ~95 discloses a kitchen appliance for cutting potatoes, particu]arly semi-cooked potatoes, in which there are double-edged plastic knives connected in one piece with the base plate in the form of two successively displaced transverse rows. In this kitchen appliance, the cutting edges of the knives are initially parallel to the cutting direction and are then bent concavely downwards. This kitchen appliance is particularly suitable for producing curl-like potato strips, if the potatoes are semi-cooked beforehand. This kitchen appliance is less satisfactory and requires more energy expenditure 13~53~6 when used for dealing with raw food.
EP-OS 0 189 743 discloses a raw food cutter of the aforementioned type, which has in principle proved completely satisfactory. The problem of the present invention is t~ improve the manufacture and handling of said cutter in such a way that the cutting resistance is further reduced and manufacture is simplified and made less expenslve.
The present invention is a raw food cutter for cutting raw food into strips. It has a base plate on whose top surface are provided two butting surfaces located in one plane, and between which is arranged at least one knife row running substantially at right angles to a longitudinal cutting direction and whose knives, with approximately inverted U-shaped cutting edges, project heightwise over the butting faces and are open towards the underside of the base plate, the underside of the knife being at least partly inclined towards the base plate. The knife rows are constructed in an arcuate meander-like manner in one piece from a thin metal band, accompanied by formation of upper and lower transverse webs and lateral webs linking the upper and lower transverse webs and being fixed with the lower transverse webs in the base plate. The lower trans-verse webs are located below or level with the butting faces. The upper transverse webs project beyond the butting faces and, for forming double-edyed knives, are orientated in alignment with the cutting direction, sub-stantially parallel to the plane of the butting faces. The knives are dented, at a location approximately central along their lo~gitudinal dimension, towards the base plate.
Openings are formed in the base plate level with the knife rows. The openings are located below the upper transverse webs of the knives and are bounded by longitudinal webs, the lower transverse webs of the knives being jointly injection moulded into the longitudinal webs. The metal band from which the knife rows are formed are sharpened at both longitudinal faces.
~3~3~ Ei A ~-sha~ed cross-section is retained over a considerable length of thc cutting process. As a result the cutting forces are significantly reduced compared with conventional kitchen graters.
Instead of being displaced, the material cut is cleanly cut through. Surprisingly there is also no clogging of the base plate free space left under the knives. The substantially parallel arrangcment of the knife cutting edges in fact appears to improve the frce cutting of the individual knives. Apart from simple manufacture by stamping and the priar, t~o-sided, mechanical sharpening, the advantage of construçting the kni~e ro~ frorll a metal band is that the latter can be relatively thin and is e.g. approximately 1/10 mm. This thin cross-section of thc cutting cdges naturally extends over the entire cutting edge len~th and depth, so that during cutting the product i~
not ~ueezed. The significance of tl-is advantage is immediatcly app.llent if it is remembered that the thickness of the lateral . . _ . _ 13~;3~6 ~-el~s must be pressed through the cut material. Despite the use of such a thin meta] band, the enormous stability of the knife is surprising. This is on the one hand apparently due to the meander-]ike construction of the metal band and on the other to the fact that each ].ower transverse web is fixed in the base ~late.
Admittedly German utility model 19 91 402 discloses a domestic cutting appliance for cutting chips or French fries, in which there is a rectangularly wave-like bent knife arranged at right angles to the cutti.ng direction. This knife is fixed to the facing 10ngi.tlldinal strips of the kitchen appliance. However, as a rcsu]t of the knife size and cutting edge thickness, it is not suitable for cutting raw food.
A so-called waffle cutter is also known, in which a wave-like bent knife fitted in sloping manner with respect to the cutti~g di.rection is fixed in the rear bearing plate. However, this cutter also has excessively large knives and cutting edge thicknesses.
As stated hereinbefore, when cutting raw food it is a ~uestion of producing very thin strips. If these strips are to be cut by m-~ans of IJ-shaped knives, the problem arises that the lateral ebs must pass through the vegetable. With the large number of lateral webs necessary for such raw food graters, the cutting edge thickness can be summated to such an extent that not only i.s the cutti.ng resistance increased, but also there is a considerab].e increase in the risk of the already cut strips jamming.
13~53~;
However, problems can occur due to the resulting stability problems of th~ knife row through merely reducing the thickness of the cutting edge. These contradictory re-quirements have been taken into account for the first time by the present invention.
Detailed Descri~tion of a Preferred Embodiment In a preferred embodiment of the invention the raw food cutter is a cutting board. Food is cut into strips by moving the food longitudinally in relation to the board.
The board supports two rows of knives which serve to cut the food into strips as the food is slid along the board or the board is slid over the food. Moving the food longitudi-nally in relation to the board drives the rows of knivesinto the food.
Each row of knives is formed out of a thin metal sheet. The formed metal sheets are attached to the board and positioned over corresponding apertures in the board.
The metal sheets and apertures extend tranversely across the cutting surface (hereinafter referred to as the butting surface) of the board. The metal sheets lie in a plane which is generally parallel to the plane of the butting surface, although slightly recessed below the plane of the butting surface. The tranverse edges of the metal sheets (the edges the food will engage when moved longitudinally in relation to the board) are sharpened so as to provide the cutting edges of the knives. The knives are formed as inverted U-shaped impressions in the metal sheets. That is, the knives are punch-pressed out of the metal sheets as a parallel array of longitudinal downwardly concave channels.
The array of punch-pressed channels is thus disposed above the plane of the butting surface so as to engage food moved along the butting surface. The array is held in place by the remaining non-deformed metal sheet. Each channel is defined by its two sides (each side hereinafter re~erred to as a lateral web) and by its surface disposed uppermost ~3~;3~
above the butting surface (the uppermost surface herein-after referred to as the upper transverse web).
The remaining non-deformed metal sheet forms a lower transverse web between the channels. It extends transversely, in a plane slightly recessed from, and parallel to, the plane of the butting surface, into the sides of the board. The lower tranverse web is anchored by means of anchoring depressions in the web and by means of holes in the web which serve to anchor the web during the plastic injection moulding process by which the board is formed.
Each channel i8 crimped approximately half-way along its length so that a food strip moving through the channel (the food having been cut into strips by the sharpened edges of the metal sheet forming the ends of the channel) encounter a downwardly inclined surface which tends to force the food strip out through the corresponding aperture in the board. Strips cut from the food are thus removed by being forced out through the bottom of the board.
Two parallel rows of channels form the two rows of knives.
13(~
Accordin~ toa prefe~rred embodi.l7lellt, tlle~ upper transverse ~rebs for formins double-edged knives are oriented parallel to thc plane of the butting faces and, based on the cutting direction, are in each case centrally dented or depressed to~-ards the base p].ate. Thus, the cuttinS process takes place l~Tith substantially no additional resistance. The deflection of the cut product by the~ depressions only talces place when it has acquired a certain lengtll, so that to a greater or l.esser e~tent it bends round of its o~ accord. Due to these l`eatures it is easy for the hollsc~ife to Cllt t11e p.10-luct by a reciprocating movement during each strol~e or trave:l. This is not so obvious, because hi.therto the hiSh cutting resistance in the case of raw food graters has led to a relatively poor cutting result during the return movemcnt, i.e. less is cut during the return movement than during the outward movement.
An advantageous deflcction of thc cut strips is ohtaincd in that the depressions of the upper transverse webs are rou~hly triangular, when considered at rigllt angles to the cutting dircctioJI.
Advantaseous].y the de!~ressions end at a distance above the plane~
oi` th( l-uttins iacens, wllich is sufricic~nt for the~ free cutting oI` the kll:iv-~s. ln ~d-l:it~ l, the ~?flec1irl~s forces arc kcl-l very ~r~ t1~ ress~
,~ .~
13(~5;~
An advantageous distancc between the centre of a depression and thc associated cutting edge of a knife corresponds to roughly two to three times the depth of the depression. The distance from the edge of a depression up to the associated, adjacent cutting edge roughly corresponds to the depth of a depression.
As a result of these size ratios the cutting process is particularly advantageous, whilst the distance from the edge Ofa dcpression to the adjacent cutting edge can also be made somcwhat ]arger.
According to a preferred embodiment, the width of an upper transversc web roughly corresponds to that of a lower transverse w(~ 1) .
Preferably according toa further development of the raw food grater, there are two knife rows in succession in the cutting direction and displaced at right angles thereto on the base plate.
Although it is preferred to arrange the knife rows in sloping manner with respect to the cutting direction, the longitudinal extension of the knife extending in the latter, according to an embodiment the knife rows are fitted to the base plate at right anglcs to the cutting direction. Advantageously the base plate is madc from p]astic.
A particularly stable fitting of the knife row to the base plate is obtained if openings bounded by longitudinal webs are provided leve] with the knife rows on the base plate located below the upper transverse webs of the knife, the lower transverse ~31~S;~?6 bs o~ the knife also being injection moulded in the longit~dinal ~-cbs of thc base plate.
The free cutting of the knives is further facilitated in that the openings are made longer than the upper transverse webs of the knivcs and terminate at a distance from the cutting edges of the latter.
A good anchoring of the lower transverse webs in the longitudinal webs of the base plate is broughtabout in that impressions are ma-le on the lower transverse webs for anchoring the latter in t~ p]~stic.
The good anchoring can be further improved in that the depressions are provided with openings for the passage of the plastic. During the in~jection moulding of the raw food cutter, the plastic passes through these openings, which leads to a positive connection between the lower transverse webs of the knife and the base plate.
The anchoring of the lower transverse webs is also improved in that, based on the cutting direction, the impressions are located in the centre of the lower transverse webs.
An embodiment of the invention is described in greater detail hereinafter relative to the drawings, wherein show:
Fig. 1 A perspective plan view of the inventive raw food cutter .
I~ig. 2 A section through a knife row along line II-II of fig. 1.
131~S3~6 ig. 3 A section through a knife row along line III-III of fig. 1.
~ig. 1 shows a raw food cutter 1 for cutting raw food strips.
Cutter 1 comprises a base plate 2, on whose top surface 3 are provided two butting faces 4 and 5 located in one plane. Between butting faces 4, 5 are provided two knife rows 6, 7 displaced reciprocally and at right angles to cutting direction A. Knife rows 6, 7 have knives with U-shaped cutting edges 8, whose height pro~jects over the butting faces 4, 5 and are open towards the underside 9 of base plate 2. The knife underside i9 at least partly inclined towards the base plate (cf. fig. 2).
As can be gathered from fig. 1, the knife rows in each case comprise a thin metal band 10 with a thickness of approximately 1/10 mm. Metal band 10 is bent in meander-like manner, accompanied by the formation of upper transverse webs 11, lower transverse webs 12 and lateral webs 13 interconnecting the same.
As can be clearly gathered from fig. 3, the lower transverse webs are fixed in the base plate and positioned below the butting faces 4, 5. The upper transverse webs 11 project over and beyond butting faces 4, 5 and, based on the cutting direction A, are oriented substantially parallel to the plane of butting faces 4, 5.
As can be gathered from the drawings, knife rows 6, 7 are constructed in doub]e-edged form, the upper transverse webs 11 being centrally provided with dents or depressions 14 directed ~3~3~6 towards the basc plate.
It can be gathered from figs. 2 and 3 that the depressions 14 of the upper transverse webs 11 are roughly triangular, considered at ri.ght angles to cutting direction A. Depressions 14 terminate at a distance above the plane of butting faces 4 and 5.
As can be clearly gathered from fig. 2, the distance between the centre of a depression 14 and the associating cutting edge ~ of a knife is roughl.y two to three times the depth of le~ress;.on 1ll. Measured from the edge of a depression 14, the d-ist~nce to the associated adjacent cutting edge 8 roughly corresponds to the depth of a depression.
As can be gathered from fig~ 1 the width of an upper transverse web 11 roughly corresponds to that of a lower transverse web 12.
Although the knife rows 6, 7 could also be inclined to the cutting direction A, in this embodiment they are fitted to the base plate 2 at ri.ght angles to cutting direct,ion A~
Base plate 2 is made from plastic. ~he metal bands 10 from w'hi.ch I,he knife rows 6, 7 are made are also injection moulded into the base plate 2 of the raw food cutter 1. For this purpose on base plate 2 and level with the knife rows 6, 7 are provi,ded openings 16 bounded by longitudinal webs 15 and which are located below the upper transverse webs 11 of knives 6, 7.
The lower transverse webs 12 of knives 6, 7 are jointly injection moulded in to the longitudinal webs 15 of base plate 2.
13~S;~6 Impressions 17 are made in the transverse webs for the better anchoring of the lower transverse webs 12 in the longitudinal wcbs 15 of base plate 2.
To ensure even better anchoring of the transverse webs of the knives in the longitudinal webs of the base plate, the impressions 17 are provided with openings 18 through which the plastic can pass during injection moulding. Based on cutting direction A, impressions 17 and also openings 18 are located in the centre of the lower transverse webs 12.
As can be particularly well gathered from fig. 2, openings 16 are longer than the upper transverse webs 11 of knives 6, 7 and terminate at a distance from the knife cutting edges 8. This cannot be gathered as clearly from fig. 1.
The invention functions as follows. The raw food cutter enables vegetables to be cut into very fine strips without any pulping or other damage occurring.
At the start of the shredding process, the material for cutting is placed on the upper butting face 4 and is then guided against the first knife row 6. When the product strikes against the cutting edge 8 of the first knife row 6, the upper transverse webs 11 and the associated lateral webs 13 of knife row 6 pass into the product without bending down the already cut part.
Only when the leading edge of the cut material reaches depression 14 is the cut strip deflected downwards with a relatively long ~53~6 1 ~v- r al^m of approximately two to threc timcs thc depth of deprcssion 1~l. 1`his deflection is sufficient for the cut strips t o pass througll openinss 16 in such a way that they pass out ol` the openinss 16 on the underside of base plate 2.
After passing through the first knife row 6, the cut material encounters the second knife row 7, which is transversely d-isplaced with respect to the first knife row 5. The cut product parts left behind are now cut in the form of strips as described hereinbefore.
~(0 I;lle Cllt product is located on the lower butting face 5, it is oncc again brought against knife ro~- 7 by a pulling movement oi` the arm, but this J10~' takes place in the opposite direction.
As a result of the extremely small cutting resistance, the elltire surface of the cut product remains on the butting face 5, -~ithout any tilting occurring. This is not so obvious, because as a result of the unfavourable force application to the cut product cluring the upward pulling movement, even in the case of a mocleratr rcsist~ncc on its leading edge, said product would tcnd to lift from the butting face 5, but this problem does not occur hcrc.
As thc strips cut during the outward movement have alrcady dropT)ed out of the openings 16, the latter arc now free for the passage of the strips cut during the return movement.
Aft~-~r T)aCsins kllife ro~ 7, in the snme ~.-ay as described ~3(~539!6 hereinbefore further strips are cut from the cut product on knife row 6.
The inventive features disclosed in the abo~e description, the drawings and claims can be essential to the realization of the di.fferent embodiments of the invention, either singly or in random combination.
~3J~3~
LIST OF REFERENCE NUMERALS
1 Raw food cutter 2 Base plate 3 Top surface 4/5 Butting face 6/7 Knife row 8 Cutting edge 9 Underside ]O Metal band 11/12 Transverse webs :L3 ~teral webs 14 Depression Longitudi~l webs 16 Openings ]7 Impressions 18 Openings A Cutting directi.on
Claims (18)
1. Raw food cutter for cutting raw food into strips, having a base plate on whose top surface are provided two butting faces located in one plane and between which is arranged at least one knife row running substantially at right angles to a longitudinal cutting direction and whose knives, with approximately inverted U-shaped cutting edges, project heightwise over the butting faces and are open towards the underside of said base plate, the underside of said knives being at least partly inclined towards said base plate, said at least one knife row being constructed in arcuate meander-like manner in one piece from a thin metal band, accompanied by formation of upper and lower transverse webs and lateral webs linking said upper and lower transverse webs and being fixed with said lower transverse webs in said base plate, said lower transverse webs being located below or level with said butting faces, said upper transverse webs projecting beyond said butting faces, and for forming double-edged knives, being longi-tudinally oriented and substantially parallel to the plane of said butting faces, said upper transverse webs being dented towards said base plate, and openings being formed in said base plate level with said at least one knife row, wherein said openings are located below said upper trans-verse webs of said knives and bounded by longitudinal webs, said lower transverse webs of said knives being jointly injection moulded into said longitudinal webs, character-ized in that the metal band from which the knife row is formed is sharpened on both faces.
2. Raw food cutter according to claim 1, character-ized in that the openings (16) are longer than the upper transverse webs (11) of knives (6, 7) and terminate at a distance from the cutting edges (8) of knives (6, 7).
3. Raw food cutter according to claim 1, characterized in that impressions (17) are made on the lower transverse webs (12) of knives (6, 7) for anchoring the transverse webs (12) in the plastic.
4. Raw food cutter according to claim 2, characterized in that impressions (17) are made on the lower transverse webs (12) of knives (6, 7) for anchoring the transverse webs (12) in the plastic.
5. Raw food cutter according to claim 3, characterized in that the impressions (17) are provided with openings (18) for the passage of the plastic.
6. Raw food cutter according to claim 4, characterized in that the impressions (17) are provided with openings (18) for the passage of the plastic.
7. Raw food cutter according to claim 3, characterized in that, based on cutting direction (A), the impressions (17) are made in the centre of the lower transverse webs (12).
8. Raw food cutter according to claim 4, characterized in that, based on cutting direction (A), the impressions (17) are made in the centre of the lower transverse webs (12).
9. Raw food cutter according to claim 5, characterized in that, based on cutting direction (A), the impressions (17) are made in the centre of the lower transverse webs (12).
10. Raw food cutter according to claim 6, characterized in that, based on cutting direction (A), the impressions (17) are made in the centre of the lower transverse webs (12).
11. Raw food cutter according to any one of claims 1 through 10, characterized in that the depressions (14) of the upper transverse webs (11) are approximately triangular, considered at right angles to cutting direction (a).
12. Raw food cutter according to any one of claims 1 through 10, characterized in that the depressions (14) end at a distance above the plane of the butting faces (4, 5).
13. Raw food cutter according to any one of claims 1 through 10, characterized in that the distance between the centre of a depression (14) and the associated cutting edges (8) of a knife (6, or 7) is roughly two or three times the depth of the depression (14).
14. Raw food cutter according to any one of claims 1 through 10, characterized in that the distance from the edge of a depression (14) to the associated, adjacent cutting edge (8) is roughly the same as the depth of a depression (14).
15. Raw food cutter according to any one of claims 1 through 10, characterized in that the width of an upper trans-verse web (11) roughly corresponds to that of the lower trans-verse web (12).
16. Raw food cutter according to any one of claims 1 through 10, characterized in that two knife rows (6, 7) are arranged successively in cutting direction (A) and at right angles thereto on base plate (2).
17. Raw food cutter according to any one of claims 1 through 10, characterized in that the knife rows (6, 7) are fitted to the base plate (2) at right angles to cutting direction (A).
18. Raw food cutter according to any one of claims 1 through 10, characterized in that the base plate (2) is made from plastic.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19868625986 DE8625986U1 (en) | 1986-01-02 | 1986-09-29 | Raw food cutter |
| DEG8625986.5 | 1986-09-29 | ||
| EP87109688.9 | 1987-07-06 | ||
| EP87109688A EP0262312B1 (en) | 1986-09-29 | 1987-07-06 | Vegetable grater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1305396C true CA1305396C (en) | 1992-07-21 |
Family
ID=25951116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000544749A Expired - Lifetime CA1305396C (en) | 1986-09-29 | 1987-08-18 | Raw food cutter |
Country Status (12)
| Country | Link |
|---|---|
| KR (1) | KR930011397B1 (en) |
| CN (1) | CN1008967B (en) |
| AR (1) | AR240274A1 (en) |
| AT (1) | ATE72390T1 (en) |
| AU (1) | AU582311B2 (en) |
| BR (1) | BR8705007A (en) |
| CA (1) | CA1305396C (en) |
| DK (1) | DK169806B1 (en) |
| FI (1) | FI86266C (en) |
| MX (1) | MX169022B (en) |
| NO (1) | NO172281C (en) |
| PT (1) | PT85813B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2815683A1 (en) * | 2013-06-18 | 2014-12-24 | Browne & Co | Food grater cutting surface |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3022021C2 (en) * | 1980-06-12 | 1984-09-27 | Alfred 5561 Landscheid Börner | Kitchen device for cutting fruit, vegetables or the like. in stripes |
-
1987
- 1987-07-06 AT AT87109688T patent/ATE72390T1/en active
- 1987-08-18 CA CA000544749A patent/CA1305396C/en not_active Expired - Lifetime
- 1987-08-28 AR AR308561A patent/AR240274A1/en active
- 1987-09-14 KR KR1019870010168A patent/KR930011397B1/en not_active IP Right Cessation
- 1987-09-16 CN CN87106355A patent/CN1008967B/en not_active Expired
- 1987-09-21 FI FI874100A patent/FI86266C/en not_active IP Right Cessation
- 1987-09-28 NO NO874057A patent/NO172281C/en unknown
- 1987-09-28 AU AU79017/87A patent/AU582311B2/en not_active Ceased
- 1987-09-28 MX MX008550A patent/MX169022B/en unknown
- 1987-09-28 BR BR8705007A patent/BR8705007A/en not_active IP Right Cessation
- 1987-09-28 DK DK509687A patent/DK169806B1/en not_active IP Right Cessation
- 1987-09-29 PT PT85813A patent/PT85813B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI86266C (en) | 1992-08-10 |
| AR240274A1 (en) | 1990-03-30 |
| PT85813B (en) | 1993-07-30 |
| FI874100A0 (en) | 1987-09-21 |
| KR880003596A (en) | 1988-05-28 |
| FI86266B (en) | 1992-04-30 |
| NO172281C (en) | 1993-06-30 |
| DK509687A (en) | 1988-03-30 |
| NO172281B (en) | 1993-03-22 |
| NO874057L (en) | 1988-03-30 |
| FI874100A (en) | 1988-03-30 |
| AU582311B2 (en) | 1989-03-16 |
| PT85813A (en) | 1988-10-14 |
| MX169022B (en) | 1993-06-17 |
| DK169806B1 (en) | 1995-03-06 |
| DK509687D0 (en) | 1987-09-28 |
| ATE72390T1 (en) | 1992-02-15 |
| AU7901787A (en) | 1988-03-31 |
| NO874057D0 (en) | 1987-09-28 |
| CN87106355A (en) | 1988-06-01 |
| KR930011397B1 (en) | 1993-12-06 |
| CN1008967B (en) | 1990-08-01 |
| BR8705007A (en) | 1988-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |