Not applicable.
Not applicable.
(1) Field of the Invention
The present invention generally relates to cutting methods and equipment. More particularly, this invention relates to a method and apparatus for delivering food product to a cutting device having a horizontal cutting plane, by which the product is properly oriented and stabilized to produce a sliced product of uniform thickness.
(2) Description of the Related Art
Various types of equipment are known for slicing, shredding and granulating food products such as vegetables, fruits and meat products. A particular example is slicing equipment adapted for cutting root vegetables, such as potatoes, into thin slices suitable for making potato chips (also known as potato crisps). A widely used machine for this purpose is commercially available from the assignee of the present invention under the name Urschel Model CC. The Model CC is a centrifugal-type slicer capable of producing uniform slices, strip cuts, shreds and granulations of a wide variety of food products at high production capabilities. The centrifugal operation of the Model CC does not provide for orienting an elongate product so that its longitudinal axis is perpendicular to the cutting blades. Therefore, when used to produce potato slices for potato chips, the Model CC requires the use of substantially round potatoes in order to produce the desired circular chip shape with a minimum amount of scrap.
Because potatoes tend to have an elongated shape, round potatoes of the type that can be processed with the Model CC typically cost more, generally as a result of the special potato varietals and/or farming techniques required to produce a rounder shape. In view of this additional cost, it would be desirable if potato chips with the desired circular shape could also be produced from potato varietals with elongate shapes. It is also of ongoing interest in the industry to achieve greater chip consistency in terms of shape and thickness, while minimizing scrap.
The TranSlicer 2000® is a slicing apparatus that has found wide use for slicing elongate food products. Commercially available from the assignee of the present invention and disclosed in U.S. Pat. No. 6,148,702 to Bucks, the TranSlicer 2000® employs a cutting wheel disposed in a vertical plane and rotated on a horizontal axis, with radial cutting blades mounted between a hub and an annular-shaped rim. A notable example of a cutting wheel suitable for use with the TranSlicer 2000® is disclosed in commonly-assigned U.S. Pat. Nos. 5,992,284 and 6,148,709 to Bucks. A conveyor or other suitable device is required to deliver product horizontally to the cutting wheel. The cutting operation performed by the TranSlicer 2000® is generally limited to the hemisphere of the cutting wheel in which the blades are traveling downward, because attempting to cut a product as the blade travels upward tends to lift the product off the conveyor.
The TranSlicer 2000® is well suited for slicing, shredding and granulating a wide variety of fruits, vegetables and meat products, including the slicing of elongate potatoes for potato chip production. However, a difficulty arises when attempting to produce crinkled slices (slices having a corrugated shape when viewed edgewise) or “V-slices” (similar to crinkled but with relative sharp peaks and valleys when viewed edgewise), both of which are common shapes for potato chips. As noted above, the TranSlicer 2000® is generally limited to a cutting operation performed in the hemisphere of the cutting wheel in which the blades are traveling downward. Even when being sliced in a downward direction, an elongate product can rotate slightly about its longitudinal axis for lack of a means for positively holding the product while engaged with the blade. While this aspect is of no significance when slicing most elongate products to produce flat slices, any rotation of an elongate potato that occurs when attempting to produce crinkled or V-slice chips results in the grooved pattens on opposite surfaces of a chip being misaligned, which can be aesthetically undesirable, cause uneven cooking, and produce shredded product if the chips are sliced sufficiently thin, e.g., on the order of about two mm or less.
In view of the above, it would be desirable if an improved method and apparatus were available that enabled potatoes and other elongate products to be properly oriented and stabilized during a slicing operation. Such a method and apparatus would preferably be suitable for producing crinkled and V-slice potato chips while preferably achieving high production capabilities and minimizing scrap.
The present invention provides a method and apparatus by which potatoes and other elongate food products can be properly oriented and stabilized during a slicing operation, while also enabling high production capabilities and minimizing scrap. The method and apparatus of this invention particularly provide for delivering food product to a cutting device having a horizontal cutting plane, which can therefore make use of gravity to deliver the product to the cutting device, but requires that the product is properly oriented and stabilized after traveling in a downward direction to the cutting device.
The apparatus of this invention includes a passage extending downwardly toward the cutting device and defining an opening in proximity to the cutting device, splines or other suitable guide means disposed along a first portion of the passage and oriented substantially parallel to the passage, and means for applying a force on a food product traveling downward through the passage so as to urge the product into contact with the splines during engagement with the cutting device. Accordingly, the method of this invention entails the delivery of food product to the cutting device through the passage, and applying a sufficient force on the product as it travels downward through the passage so that the orientation of the product remains substantially constant within the passage by the splines during engagement with the cutting device.
According to a first preferred aspect of the invention, the force is applied to the product by at least two fluid jets flowing across the passage toward the first portion, such that the fluid jets impact the product as the product travels downward through the passage. According to another preferred aspect of the invention, elongate products are delivered to the passage by means capable of separating and longitudinally aligning the products with the passage, so that the elongate products enter the passage with their longitudinal axes roughly parallel to the passage.
In view of the above, it can be seen that a significant advantage of this invention is that potatoes and other elongate food products can be properly oriented and stabilized during a slicing operation by delivering the product in a downward direction to a substantially horizontal cutting device. Orientation and stabilization of elongate product are achieved by applying a sufficient lateral force on the product to maintain the product in contact with splines or other features capable of maintaining the orientation of the product within the passage. Another significant advantage of this invention is that the use of a substantially horizontal cutting device allows the entire cutting plane to be used in performing the cutting operation, since the cutting action does not have any tendency to lift or otherwise disorient the product during the cutting operation. As such, the method and apparatus of this invention can be used to achieve high production capabilities while minimizing scrap.
Other objects and advantages of this invention will be better appreciated from the following detailed description.
The product delivery system 14 includes a conveyor 16 and flexible tubes 18 that deliver the product 32 to a number of feed tubes 22 mounted to the top of the slicing unit 20. The feed tubes 22 feed the product 32 to the cutting wheel 30 within the slicing unit 20. In
The cutting wheel 30 can be of various designs, a preferred design being the Microslice® cutting wheel disclosed in U.S. Pat. Nos. 5,992,284 and 6,148,709. As depicted in
From
While horizontal cutting wheels with vertical product delivery are known in the prior art, product orientation typically is of importance only if the product 32 is elongate, as represented in the Figures. Product orientation becomes of particular concern if the slicing operation is to produce very thin slices, e.g., on the order of about three mm or less, and a consistent peripheral shape is desired for the slices, such as a true cross-section of the product 32 or a consistent diagonal (bias) slice through the product 32. Finally, product stability becomes critical if crinkled or V-slices are desired, because any rotation of the product 32 about its longitudinal axis or lateral movement of the product 32 (i.e., perpendicular to the product's longitudinal axis) will result in misalignment of the peaks and valleys in the opposite surfaces of the slices, resulting in a product having a crosshatched (lattice) appearance that may include patterns of holes if the slices are sufficiently thin. The slicing of elongate potatoes to produce round crinkle or V-slice chips is a primary example of these circumstances, and therefore will be referred to throughout this description. However, round potatoes and other food products with various shapes, round, elongate and even rectilinear, can be handled with the processing unit 10 of this invention.
According to the invention, product stability during the cutting operation is achieved within the feed tubes 22 as a result of splines 46 or other suitable surface features present on the interior surface of a wall 48 of each feed tube 22, so as to project into a feed passage 50 defined by the tube 22. As shown, the splines 46 are oriented longitudinally to the axis of the tube 22, such that the splines 46 promote and maintain the orientation of the product 32 relative to the longitudinal axis of the tube 22. As seen in
According to a preferred aspect of the invention, the fluid jets 52 combine to apply a lateral force to the product 32 that is sufficient to push the product 32 into contact with the splines 46 and thereafter cause the product 32 to remain in contact with the splines 46 while being sliced with the cutting wheel 30, as depicted in FIG. 6. As a result, the product 32 is inhibited from rotating about its longitudinal axis. According to another preferred aspect of the invention, multiple fluid jets 52 are employed to inhibit lateral movement of the product 32. For this purpose, two sets of two converging jets 52 are preferred, as shown in
In
The force required to be applied to the product 32 in order to maintain the product 32 in contact with the splines 46 will depend in part on the mass and density of the product 32 and the speed of the blades 34. In practice, elongate potatoes of a size typical size for use in producing potato chips can be firmly held by four water jets 52 arranged as shown in
While the stabilizing force desired for cooperation with the splines 46 has been described as being generated by fluid jets 52, it is foreseeable that other means for applying a generally lateral force on product 32 could be used, such as springs, bladders, spring-loaded paddles or rollers, and brushes. Furthermore, because the product 32 is retained within the passage 50 by the splines 46 and not any wall portion (e.g., wall 48) of the feed tube 22 (for example, see FIG. 6), it is possible that the passage 50 could be defined simply by a number of splines 46 or other longitudinal members and a force-applying means opposite the splines 46. However, in a preferred embodiment, each passage 50 is defined by a feed tube 22, and the periphery of each passage 50 is entirely enclosed by the tube walls 48 and 62 so that the fluid used in the jets 52 is contained and flows downwardly through the cutting wheel 30 with the sliced product. While suitable internal diameters for the tubes 22 will depend on the size of the particular product 32, a suitable diameter for tubes 22 used to deliver potatoes is about 3.5 to about 4 inches (about 9 to about 10 cm). Splines 46 for a tube 22 of this diameter are preferably spaced about 25 to about 30 degrees apart, and are present around about one-half of the circumference of the tube 22. Suitable dimensions for the splines 46 are a width of about 0.093 inch (about 2.4 mm) and a height of about 0.090 inch (about 2.3 mm).
In view of the importance of maintaining proper alignment of the product 32 within the feed tubes 22, it can be appreciated that proper presentation of the product 32 to the tubes 22 is also important. As depicted in
While the invention has been described in terms of a preferred embodiment, it is apparent that other forms could be adopted by one skilled in the art. For example, the physical configuration of the processing unit 10, including the apparatus 12, delivery system 14, and slicing unit 20, could differ from that shown, and the physical and functional specifications of the invention could differ from those discussed. Therefore, the scope of the invention is to be limited only by the following claims.
Number | Name | Date | Kind |
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2664130 | Kubon | Dec 1953 | A |
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Number | Date | Country |
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2309594 | May 1999 | CA |
3546506 | Mar 1987 | DE |
3934143 | Apr 1991 | DE |
10057835 | Aug 2002 | DE |
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Number | Date | Country | |
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20030145698 A1 | Aug 2003 | US |