CA1327934C - Lattice blade - Google Patents

Lattice blade

Info

Publication number
CA1327934C
CA1327934C CA000601010A CA601010A CA1327934C CA 1327934 C CA1327934 C CA 1327934C CA 000601010 A CA000601010 A CA 000601010A CA 601010 A CA601010 A CA 601010A CA 1327934 C CA1327934 C CA 1327934C
Authority
CA
Canada
Prior art keywords
blade
opposing
grooves
shank
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.)
Expired - Fee Related
Application number
CA000601010A
Other languages
French (fr)
Inventor
Carl Morris
Stephen Dowbiggin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
McCain Foods Ltd
Original Assignee
McCain Foods Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by McCain Foods Ltd filed Critical McCain Foods Ltd
Priority to CA000601010A priority Critical patent/CA1327934C/en
Application granted granted Critical
Publication of CA1327934C publication Critical patent/CA1327934C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0691Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by centrifugal force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting 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
    • B26D1/0006Cutting members therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting 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
    • B26D1/01Cutting 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
    • B26D1/02Cutting 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 stationary cutting member
    • B26D1/03Cutting 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 stationary cutting member with a plurality of cutting members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting 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
    • B26D1/01Cutting 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
    • B26D1/12Cutting 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
    • B26D1/25Cutting 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
    • B26D1/34Cutting 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 parallel to the line of cut
    • B26D1/36Cutting 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 parallel to the line of cut and rotating continuously in one direction during cutting, e.g. mounted on a rotary cylinder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/18Cutting work characterised by the nature of the cut made; Apparatus therefor to obtain cubes or the like
    • B26D3/22Cutting work characterised by the nature of the cut made; Apparatus therefor to obtain cubes or the like using rotating knives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting 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
    • B26D1/0006Cutting members therefor
    • B26D2001/006Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28Splitting layers from work; Mutually separating layers by cutting

Abstract

ABSTRACT OF THE DISCLOSURE A integrally-formed knife for producing thick waffle-cut and lattice-cut potato slices has a blade and a shank extending rearwardly from the blade. The blade has opposing inclined surfaces which meet at a forward blade portion to define a thin corrugated cutting edge. Each blade surface has undulations defining a set of alternating grooves and ridges each extending rearwardly from the cutting edge and terminating at the shank. The relative inclination of the blade surfaces results in progressively greater blade thickness at a rear blade portion such that the blade is relatively rigid and self-supporting. This eliminates use of clamps on the opposing blade faces and consequent interference by clamps with slicing. The sets of grooves diverge relative to one another adjacent the rear blade portion where their bottoms are spaced in a direction transverse to the blade surfaces. The shank is unobtrusively connected to the relatively wide rear blade portion between the bottoms of rearward ends of the grooves. The shank has apertured mounting tabs extending laterally beyond either side of the blade to permit mounting in a conventional rotary-type potato slicer. -14-

Description

132793~
KN~EFORPRO~CIN~WAFFLEA~DLAT~C~CUT~
EELDOFTHE ~YENTIQ~
The invention relates to knives for cutting foodstuffs such as potatoes into waMe-cut or lattice-cut slices.
~ACKGROUNDOFTHE~ENTION
It is known to use a rotary-type slicing machine to produce both waffle-cut and lat~ce-cut potato slices for preparation of french-fried potatoes or potato chips. Waffle-cut potato slices generally have alterna~dng ridges and grooves on opposing faces, the grooves being relatively shallow compared to the thickness of the slices. Lafflce-cut potato slices are similar, but the grooves on one face are transverse to those on an opposing face and are cut suffilciently deep as to intersect and produce a lafflce-like appearance.
Rotary-type potato slicing machines for such purposes are described in U.S. Patent nos. 3,139,127 and 3,139,130 to Urschel et al.
Such slicing machines comprise a central rotating carriage and a plurality of radial guides filxed to the carriage. Potatoes received by the central carriage are urged by centrifugal forces outwardly through the radial guides against stationary knife assemblies. These knife assemblies are typically mounted on a housing sidewall having a part-spherical shape and extend at preselected angles from the sidewall into the path of the orbiting potatoes. Thin slices areproduced as each potato successively engages the various knife assemblies, each slice escaping tangentially through an opening in the housing sidewall located outwardly of an particular cuffing blade.
The knife assemblies of the Urschel machine use thin corrugated blades to produce waffle and laffice cuts. In order to produce transverse networks of grooves on opposing faces of a potato slice, the radial ..
' ' : . ,~' , ,.' , ,,- . . . -guides and the potatoes contained therein are rotated synchronously with rotation of the calTiage. The cut surface of each potato is essentially rotated through 90 degrees between successive engagements with a knife assembly.
If the amplitude of the blade corrugations is sufficiently great relative to the5 thickness of the slices being cut then the resulting potato slices have a lafflce-shape.
The original Urschel slicer is limited to producing lattice-cut slices having a thickness of no more than about 1/8 inch. Similar limitations arise in the depth of waffle-cuts which can be produced. This problem arises 10 largely because of the construction and support of the blade. Each blade is essentially a thin sheet of metal appropriately bent to form longitudinal corrugations. Since the blade is relatively flexible, it is commonly supported by clamping its opposing faces rearwardly of its leading cutting edge. If the amplitude of the corrugatio~s is suffilciently great to produce relatively thick15 laffice-cut slices, there is a tendency for an inner clamping member to shearridges freshly-cut on a potato and for an outer clamping member to shear ridges freshly-cut on an escaping potato slice.
This shortcoming in the Urschel cutter is addressed in prior U.S. Patent No. 4, 523,503 to Julian et al. The Julian patent suggests that 20 clamping members be formed with tapered fingers which extend forwardly into the grooves of an associated blade. As a potato and slice are advanced along the thin conugated blade, they encounter the fingers and are raised clear of the clamping members. One significant shortcoming associated with such devices is that considerable debris tends to lodge between the blade, fingers 25 and clamping member, which complicates cleaning of the rotary cutter.
Similar blade clamp features are taught in prior U.S. patent no. 4,120,089 to Bomer.

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-The present invention addresses the same problem, but seeks to modiiy the construction of the blade itself in a such a manner that the clamping members which might otherwise interfere with proper cutting of a potato slice are entirely eliminated.
S BR~UMMARY OF THE INVENl'ION
In one aspect, the invention provides a knife for use in producing waffle-cut or lattice-cut slices of potatoes or other foodstuffs, comprising a rigid blade having opposing blade surfaces which meet at a forward blade portion to define a thin corrugated cutting edge. Each blade surface has undulations defining a multiplicity of alternating grooves and ridges each commencing at the cutting edge and extending rearwardly from the cutting edge to a rear blade portion spaced from the forward blade portion.
The grooves and ridges are "elongate", ~at is, the length of each groove and ridge in a front-to-rear direction exceeds the lateral spacing between adjacent groove bottoms or adjacent ridge tops of the blade surface at the corrugated cutting edge. The opposing blade surfaces are generally inclined relative to one another such that the thickness of the blade increases continuously from the forward blade portion to the rear blade portion.
The knife preferably includes a shank integrally fo~ned with the blade and attached to the rear blade portion between the opposing blade surfaces. The sha~ may be appropriately adapted to permit installation into a slicing machine. Outer surfaces of the blade and shank may be generally convex in side-to-6ide cross-section and the inner surfaces may be generally concave to conforrn more closely to part-spherical housings commonly provided in rotary-type slicers.
The construction and advantages of a knife embodying the invention are best understood by considering a prior art corrugated blade.

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13279~ -Such a prior blade is formed of thin sheet metal with substantially parallel opposing surfaces. The blade is consequently very flexible and requires clamping of its opposing faces to properly support the blade during cutdng operations. In the present invention, the two undulated surfaces of such a prior blade are effectively rotated outwardly about the cutting edge to arrive at a generally wedge-like blade. The blade is consequently more rigid than prior sheet metal blades thereby eliminating the need for surface clamping members which might otherwise interfere with production of deep waffle- and lattice-cuts. The rigidity can be increased markedly for any given material and overall blade size by simply increasing the general inclination of the bladesurfaces. The freedom to select the thickness of the rear blade portion also allows convenient mounting in a rotary slicing machine, as with a shank -extending rearwardly in an unobtrusive manner from the rear blade portion or with mounting tabs extending laterally from the rear blade portion itself.
Since surface clamps are not required, there is no need for clamp fingers or other structures which collect debris during slicing operations and are potentially sub~ect to breakage and additional maintenance requirements.
Other aspects of the present invention will be apparent from a description of a preferred embodiment below and will be deflned in greater detail in the appended claims.
I?E~scRIpIloN OF TH~ DRAWINGS
The invention will be better understood with reference to drawings in which:
Fig. 1 is a diagrammatic plan view of an Urschel-type slicer incorporating slicing knives embodying the invention;
Fig. 2 is a fragmented perspective view detailing the .
'~

` 132793~
construction of stationary slicer housing and the mounting of the knives;
Fig. 3 is a perspective view of an outer surface of a knife constructed according to the invention;
Fig. 4 is a perspective view of the opposing inner surface of 5 the knife;
Fig. 5 is a cross-sectional view along the lines 5-5 of Fig. 3;
Fig. 6 is a cross-sectional view along the lines 6-6 of Fig. 3;
Fig. 7 is a front view of the knife iUustrating its mounting in Urschel-type cutter;
Figs. 8 and 9 are fragmented cross-sectional view similar to the views of figs. S and 6 but showing the knife mounted on the cutter;
Fig. 10 is a superposition onto fig. 6 of the cross-sectional representation in fig. 5 of the bottom of a groove of the inner blade surface, indicating the relative inclination and spacing of adjacent grooves on opposing 15 blade surfaces.
~SCRIPrlON OF PRE~BR~ODIM~NT
Reference is made to Fig. 1 which illustrates an Urschel-type potato slicing machine 10. It comprises a statioqlary housing 12 with a generally annular (part-spherical) sidewall 14. A plurality of identical knives 20 are equallyffpaced circumferentiaUy along the sidewaU 14, such as the knife 16. A rotary carriage 18 is mounted centrally within the sidewall 14 and comprises a plurality of radial guides, such as the guide 20. Potatoes received by the carriage 18 are directed radially by centrifugal forces through the guides until they engage the housing sidewaU 14. With rotation of the 25 carriage 18, the hlives remove successive slices from the potatoes.
E~xemplary is the potato 22 shown engaging the knife 16.
The knife 16 which is typical comprises a blade 24 and a ' ' ' .. -.
. :: .
. . .

~ . , . .. : . .

132793~
shank 26 integrally formed of steel as apparent, for exarnple, in figs. 3 and 4.These are made by casting the metal in the required configuration and then machining the surfaces of the casting. The blade 24 may be seen to comprise opposing inner and outer blade surfaces 28,30 which meet in angled 5 relationship (forrning an angle of between about 8 and 15,degrees) at a forward blade portion to define a thin corrugated cutting edge 32. The peak-to-peak amplitude of the corrugations of the cutting edge 32 might typically be in excess of about one-eighth of an inch (actually about one-quarter inch in the blade 24), making the blade 24 appropriate for production of relatively 10 thick lattice-cut potato slices.
Each of the opposing blade surfaces 28,30 has undulations defming a set of elongate alternating grooves and ridges each commencing at the cutting edge 32 and extending rearwardly from the cutting edge 32 to a rear blade portion and ultimately terminating at the shank 26. The length of 15 the grooves might typically be between 1 and 2 inches while the lateral spacing between adjacent groove bottoms or ridge tops at the colrugated cutting edge 32 might typically be in the order of about one-half inch. A ridge 36 and adjacent groove 38 of the outer blade surface 30 are typical of the outerset and are shown in cross-section in the views of Figs. S and 6. The general 20 profiles of a typical groove 40 and adjacent ridge 42 associated with the inner blade surface 28 are also apparent respectively in Figs. S and 6.
The opposing iMer and outer blade surfaces 28, 30 are generally inclined relative to one another. The blade 24 consequently becomes generally thicker in cross-section from the forward blade portion to 25 a rear blade pottion spaced from the forward blade portion. The difference inthickness between forward and rear blade portions will be apparent in the cross-sectional view of Fig. S where points 44 and 46 associated respectively : . .
- . ~ " .,- , ' , ~
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.

1327~3~

with the for vard and rear blade portions are indicated, and also in Fig. 6 at points 48 and 50 associated respectively with the forward and rear blade portions. The blade 24 is accQrdingly quite rigid and sufficiently self-supporting that it does not require clamping members on opposing faces 5 to ensure that the blade 24 retains a required configuration during slicing.
The relationship between bottoms of adjacent grooves on opposing blade surfaces in this embodiment of the invention is apparent from in fig. 10. The relationship between bottoms of the adjacent grooves 38,40 of the opposing blade surfaces is typical. The t vo grooves 38,40 initially 10 converge at the forward blade portion but diverge at the rear blade portion and are spaced at the rear blade porlion, in a direction transverse to the blade surfaces 28, 30, by a distance corresponding to about the peak-to-peak amplitude of the corrugations of the cutting edge 32. The thickness of the blade 24 in this region will tend to be in excess of the peak-to-peak amplitude. The divergence of the adjacent groove bottoms on the opposing blade surfaces 28,30 and their spacing in this region permits the shank 26 to be unobtrusively attached to the rear portion of the blade 24. It will be apparent from figs.3-6 that the shank 26 lies between the opposing blade surfaces 28,30, at the rear blade portion where these surfaces and their 20 grooves are significantly spaced-apart. The shank 26 has opposing inner and outer shank surfaces 52,54 each meeting one of the opposing blade surfaces 28, 30 and the grooves formed in the blade surfaces. Each of the shank surfaces 52, S4 is so inclined relative to the blade surfaces 28, 30, respectively, that rearward ends of the blade grooves are directed outwardly 25 of the shank 26, ensuring that the shank 26 does not obstruct the grooves andconsequently the movement of either a potato being cut by the blade 24 or of a .

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~327934 slice being freshly cut from the potato (as apparent from figs. 8 and 9).
Basically, the divergence and separation of the opposing sets of grooves provides a blade region where the shank 26 can be connected without intruding into the grooves bottoms. In contradistinction, a shank of any 5 practical thickness cannot be connected to the rear of a conventional sheet-like corrugated blade without intruding into the rearward ends of the opposing sets of grooves.
The shank 26 has opposing tabs 56,58, one tab extending laterally beyond each of the opposing sides 60, 62 of the blade 24. These tabs 56,58 are formed with threaded apertures 64, 66 that permit the knife to be mounted to the Urschel-type potato slicing machine 10, as with the Allen screws 68, 70 apparent in figs. 2 and 7. Although the separation and divergence of the opposing groove bottoms at ~e rear blade portion permits unobtrusive attachment of the shank 26 to the rear blade portion, the same general configuration also provides a sufficienay thick and robust blade that the shank might be eliminated in favor of laterally-extending mounting tabs formed with or secured directly to the rear blade portion itself.
The manner in which a potato can be cut to produce a lattice-cut potato slice will be apparent from the cross-sectional view of Fig.
8 where the potato 22 is shown engaging the blade 24 of the knife 16. The exposed surface 72 of ahe potato 22 is assumed previously to have been formed with a first waffle-cut defining the grooves and ridges shown extending transversely to the plane of the drawing page and to have been rotated through 90 degrees to reach the orientation i11ustrated. As apparent in ~ig. 8, the amplitude of the corrugations is suffichnt to form deep grooves in the potato slice and to define a lattice~shape. Details respecting angling of the blade 24, selection of opening size and the like will be apparent from ahe : . . -, . .

1327~3~
teachings of the prior Urschel patents which are incorporated herein by reference.
A number of matters regarding the specific shape of the blade 24 and shank 26 should be noted. First, the outer blade surface 30 is 5 generally convex (essentially partffpherical) in side-to-side cross-section while the inner blade surface 28 is generally concave (also essentially part-spherical) in side-to-side cross-section. This is largely to allow the blade 24 to conform generally to the part-spherical shape of the housing sidewall 14 of the associated UIschel-type slicing machine 10. The shank 10 surfaces 52,54 are similarly configured for similar reasons.
With respect to the outer blade surface 30, it will be noted that the tops of the ridges and the bottoms of the grooves are parallel and straight (as apparent in Figs.5 and 8), as on the outer surface of a more conventional sheet-like corrugated blade. The grooves and ridges of the inner blade 15 surface 28 might be similarly con~lgured, with the bottoms of the grooves positioned flush with the inner surface 74 of the slicer sidewall 14. However, as apparent in Fig. 9 where the typical inner groove 40 and ridge 42 are illustMted in cross-section, the ridges and grooves of the inner blade surface 28 may be appropriately machined so that a potato being processed sees a 20 smoother transition between the inner blade surface 28 and the inner surface 74 of the cutter sidewall 14. In particular, the inner grooves curve Mdially inwardly from the forward blade portion to the rear blade pc~on. The ridges of the inner blade surface 28 are continuously reduced (by appropriate machining) from the forward blade portion to the rear blade portion. The 25 curva~ure of the inner grooves and ridges and also that of the inner shank surface S2 is wch that the inner surfaces presented by the knife to a potato flows more smoothly into the inner housing surface 74, as apparent in Fig. 9.

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It will be appreciated that a par~cular embodiment of the invention has been described and that modifications may be made therein without necessarily departing from the spirit of the invention or the scope of the appended claims.

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Claims (9)

1. A knife for use in producing waffle-cut or lattice-cut slices of potatoes or other foodstuffs, comprising a rigid blade having opposing blade surfaces meeting at a forward blade portion to define a thin corrugated cutting edge, each of the opposing blade surfaces having undulations defining a multiplicity of alternating elongate grooves and ridges each commencing at the cutting edge and extending rearwardly from the cutting edge to a rear blade portion spaced from the forward blade portion, the opposing blade surfaces being generally inclined relative to one another such that the thickness of the blade increases continuously from the forward blade portion to the rear blade portion;
said opposing surfaces as measured in longitudinal planes containing said ridges associated with one said surface converging on approach to said cutting edge at a different rate to said opposing surfaces as measured in longitudinal planes containing said ridges associated with the other said surface.
2. A knife as claimed in Claim 1 comprising a shank extending rearwardly from the rear blade portion and attached to the rear blade portion between the opposing blade surfaces, the shank having opposing shank surfaces each meeting a different one of the opposing blade surfaces, each shank surface being so inclined relative to the blade surface met by the shank surface that rearward ends of the grooves of each blade surface are directed outwardly of the shank.
3. A knife as claimed in Claim 2 in which the blade is integrally formed with the shank.
4. A knife as claimed in Claim 3 in which one of the opposing blade surfaces and the shank surface met by the one of the opposing blade surfaces are generally convex in side-to-side cross-section and the other of the opposing blade surfaces and the shank surface met by the over of the opposing blade surfaces are generally concave in side-to-side cross-section.
5. A knife as claimed in Claim 1 in which the corrugations of the cutting edge have a peak-to-peak amplitude of a least about one-eight of an inch.
6. A knife for use in producing waffle-cut or lattice-cut slices of potatoes or other foodstuffs, comprising a rigid blade having opposing blade surfaces inclined relative to one another and meeting at a forward blade portion to define a thin corrugated cutting edge having corrugations of a predetermined peak-to-peak amplitude, each of the opposing blade surfaces having undulations defining a multiplicity of alternating grooves and ridges commencing at the cutting edge and extending rearwardly from the cutting edge to a rear blade portion, the opposing blade surfaces diverging generally and continuously relative to one another from the forward blade portion to the rear blade portion such that the rear blade portion has a cross-sectional thickness between the opposing blade surfaces of at least about the peak-to-peak amplitude of the corrugations, the angle of divergence as measured along ridges associated with each surface differing.
7. A knife for use in producing waffle-cut or lattice-cut slices of potatoes or other foodstuffs, comprising:
a blade having forward and rear blade portions;
a shank extending rearwardly from the rear blade portion;
the blade having opposing blade surfaces meeting in angled relationship at the forward blade portion to define a thin corrugated cutting edge, each of the opposing blade surfaces having undulations defining a multiplicity of alternating grooves and ridges commencing at and extending rearwardly from the cutting edge and terminating at the shank, bottoms of the grooves of one of the opposing blade surfaces diverging relative to and being spaced in a direction perpendicular to the blade surfaces from bottoms of adjacent grooves of the other of the opposing blade surfaces adjacent to the shank;
said surfaces as measured in longitudinal planes containing the ridges and grooves associated with one said surface converging on approach to said cutting edge at a greater angle than said surfaces as measured in longitudinal planes containing the ridges and grooves associated with the other said surface.
8. A knife for use in producing waffle-cut or lattice-cut slices of potatoes or other foodstuffs, comprising a rigid blade having opposing blade surfaces inclined relative to one another such that the blade is generally thicker in cross-section at a rear blade portion than at a forward blade portion, the opposing blade surfaces meeting in angled relationship at the forward blade portion to define a thin corrugated cutting edge, each of the opposing blade surfaces having undulations defining a multiplicity of alternating grooves and ridges commencing at the cutting edge and extending rearwardly from the cutting edge to the rear blade portion, each of the grooves of each of the opposing blade surfaces having a bottom, the bottom of each groove of one of the opposing blade surfaces subtending an angle of convergence towards the bottoms of adjacent grooves of the other of the opposing blade portions at the forward blade portion and subtending an angle of divergence relative to the adjacent grooves at the rear blade portion said angle of convergence adjacent, the cutting edge of said knife as measured in planes bisecting said grooves being greater for grooves associated with one said surface than for grooves associated with the other said surface.
9. A cutting knife as claimed in Claim 4, wherein said opposing surfaces measured in longitudinal planes containing said ridges associated with said convex surface converge at a greater rate than said opposing surfaces as measured in longitudinal planes containing ridges associated with said concave surface.
CA000601010A 1989-05-29 1989-05-29 Lattice blade Expired - Fee Related CA1327934C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000601010A CA1327934C (en) 1989-05-29 1989-05-29 Lattice blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000601010A CA1327934C (en) 1989-05-29 1989-05-29 Lattice blade

Publications (1)

Publication Number Publication Date
CA1327934C true CA1327934C (en) 1994-03-22

Family

ID=4140120

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000601010A Expired - Fee Related CA1327934C (en) 1989-05-29 1989-05-29 Lattice blade

Country Status (1)

Country Link
CA (1) CA1327934C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2800652A4 (en) * 2011-12-27 2016-01-06 Urschel Lab Inc Apparatuses for cutting food products
EP3352956B1 (en) 2015-09-24 2021-01-06 Urschel Laboratories, Inc. Slicing machines, knife assemblies, and methods for slicing products
US10919172B2 (en) 2013-11-21 2021-02-16 Fam Knife assembly for flat knife blade and cutting system equipped with same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2800652A4 (en) * 2011-12-27 2016-01-06 Urschel Lab Inc Apparatuses for cutting food products
EP2800652B1 (en) 2011-12-27 2017-05-17 Urschel Laboratories, Inc. Apparatuses for cutting food products
EP3156198A3 (en) * 2011-12-27 2017-07-12 Urschel Laboratories, Inc. Apparatus for cutting food products
EP3800019A1 (en) * 2011-12-27 2021-04-07 Urschel Laboratories, Inc. Apparatuses for cutting food products
US10919172B2 (en) 2013-11-21 2021-02-16 Fam Knife assembly for flat knife blade and cutting system equipped with same
EP3352956B1 (en) 2015-09-24 2021-01-06 Urschel Laboratories, Inc. Slicing machines, knife assemblies, and methods for slicing products

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