Modular units, clamping assemblies, and slicing machines equipped therewith

Abstract

A modular unit configured for mounting to a cutting head of a slicing machine and for securing a knife to the cutting head, and slicing machines equipped with one or more of such modular units. The modular unit includes mounting blocks adapted to be spaced apart in an axial direction of the cutting head, and a clamping assembly assembled with the mounting blocks so as to extend between the mounting blocks. The clamping assembly is configured to secure a knife to the cutting head, and at least portions of the clamping assembly may be removable from the cutting head by disassembling the clamping assembly from the mounting blocks without removing the mounting blocks from the cutting head.

Claims

1. A method of modifying a slicing machine that comprises a cutting head having an axis, first and second support rings that are spaced apart in an axial direction of the cutting head, and a clamping assembly mounted to the first and second support rings so as to extend between the first and second support rings, the clamping assembly comprising a first knife and a cam rod having a camming portion that applies a clamping force to secure the first knife when the cam rod is rotated toward a clamping position and releases the clamping force when the cam rod is rotated toward a first release position, at least the first support ring establishing a first stop that prevents rotation of the cam rod beyond the first release position, the method comprising: replacing the first support ring with a third support ring that has a second stop that prevents rotation of the cam rod beyond a second release position, wherein the first and second stops on the first and third support rings are different so that the second release position established by the third support ring is different from the first release position established by the first support ring.

2. The method according to claim 1, wherein the clamping assembly further comprises a knife holder that supports the first knife and a clamp overlying the knife holder so that the first knife is between the knife holder and the clamp, the cam rod applying the clamping force to the clamp to clamp the first knife between the knife holder and the clamp.

3. The method according to claim 2, wherein the camming portion of the cam rod comprises a cylindrical portion of the cam rod, the camming portion contacting the clamp in the clamping position and disengaging the clamp in the first and second release positions.

4. The method according to claim 1, wherein the second release position established by the third support ring enables clamping and releasing a second knife having a thickness that is different from the first knife.

5. The method according to claim 1, further comprising: removing the first knife from the clamping assembly; installing a second knife that is thicker than the first knife; and rotating the cam rod toward the clamping position so that the camming portion thereof applies the clamping force to secure the second knife.

6. The method according to claim 5, wherein the first knife is a flat knife and the second knife is a shaped knife having a periodic pattern of peaks and valleys.

7. The method according to claim 6, further comprising: disassembling the clamping assembly from the first and second support rings; and assembling a second clamping assembly to the first and second support rings, the second clamping assembly comprising a knife holder and a clamp that each has a periodic pattern of peaks and valleys that is complementary to the periodic pattern of peaks and valleys of the shaped knife; wherein rotating the cam rod toward the clamping position clamps the second knife between the knife holder and the clamp.

8. The method according to claim 1, further comprising: removing the first knife from the clamping assembly; installing a second knife that is thinner than the first knife; and rotating the cam rod toward the clamping position so that the camming portion thereof applies the clamping force to secure the second knife.

9. The method according to claim 8, wherein the first knife is a shaped knife having a periodic pattern of peaks and valleys and the second knife is a flat knife.

10. The method according to claim 1, wherein the cam rod is rotatably and eccentrically coupled to the first and second support rings, the camming portion is closer to the first knife in the clamping position, and the camming portion is farther from the first knife in the first and second release positions.

11. The method according to claim 1, wherein the cutting head is an annular-shaped cutting head, the slicing machine further comprises an impeller coaxially mounted within the cutting head, the impeller is rotating about the axis of the cutting head in a rotational direction relative to the cutting head, the impeller has means for delivering food products radially outward toward the cutting head, and the first knife extends radially inward toward the impeller in a direction opposite the rotational direction of the impeller.

12. A method of modifying a slicing machine that comprises a cutting head having an axis, the cutting head comprising a modular unit and first and second support rings that are spaced apart in an axial direction of the cutting head, the modular unit comprising a first mounting block secured to the first support ring and a second mounting block secured to the second support ring so that the first and second mounting blocks are spaced apart in the axial direction of the cutting head, and a clamping assembly mounted to the first and second support rings with the first and second mounting blocks so as to extend between the first and second support rings, the clamping assembly comprising a first knife and a cam rod that has a camming portion that applies a clamping force to secure the first knife when the cam rod is rotated toward a clamping position and releases the clamping force when the cam rod is rotated toward a first release position, at least the first support ring establishing a first stop that prevents rotation of the cam rod beyond the first release position, the method comprising: replacing the first support ring with a third support ring that has a second stop that prevents rotation of the cam rod beyond a second release position, wherein the first and second stops on the first and third support rings are different so that the second release position established by the third support ring is different from the first release position established by the first support ring; removing the first knife from the clamping assembly; installing a second knife having a thickness that is different from the first knife; and rotating the cam rod toward the clamping position so that the camming portion thereof applies the clamping force to secure the second knife.

13. The method according to claim 12, wherein the clamping assembly further comprises a knife holder that supports the first knife and a clamp overlying the knife holder so that the first knife is between the knife holder and the clamp, the cam rod applying the clamping force to the clamp to clamp the first knife between the knife holder and the clamp.

14. The method according to claim 13, wherein the camming portion of the cam rod comprises a cylindrical portion of the cam rod, the camming portion contacting the clamp in the clamping position and disengaging the clamp in the first and second release positions.

15. The method according to claim 13, wherein the clamp has oppositely-disposed ends at which the clamp is pivotably coupled to the first and second mounting blocks.

16. The method according to claim 12, wherein the first knife is a flat knife and the second knife is a shaped knife having a periodic pattern of peaks and valleys.

17. The method according to claim 16, further comprising: disassembling the clamping assembly from the first and second mounting blocks, the second clamping assembly comprising a first knife holder and a first clamp that each does not have a periodic pattern of peaks and valleys; and assembling a second clamping assembly to the first and second mounting blocks, the second clamping assembly comprising a second knife holder and a second clamp that each has a periodic pattern of peaks and valleys that is complementary to the periodic pattern of peaks and valleys of the shaped knife; wherein rotating the cam rod toward the clamping position clamps the second knife between the second knife holder and the second clamp.

18. The method according to claim 12, wherein the first knife is a shaped knife having a periodic pattern of peaks and valleys and the second knife is a flat knife.

19. The method according to claim 18, further comprising: disassembling the clamping assembly from the first and second mounting blocks, the first clamping assembly comprising a first knife holder and a first clamp that each has a periodic pattern of peaks and valleys that is complementary to the periodic pattern of peaks and valleys of the shaped knife; and assembling a second clamping assembly to the first and second mounting blocks, the second clamping assembly comprising a second knife holder and a second clamp that each does not have a periodic pattern of peaks and valleys; wherein rotating the cam rod toward the clamping position clamps the second knife between the second knife holder and the second clamp.

20. The method according to claim 12, further comprising disassembling the clamping assembly from the first and second mounting blocks and assembling a second clamping assembly to the first and second mounting blocks without removing the first and second mounting blocks from the first and second support rings.

21. The method according to claim 12, wherein the cam rod is rotatably and eccentrically coupled to the first and second mounting blocks, the camming portion is closer to the first and second knives in the clamping position, and the camming portion is farther from the first and second knives in the first and second release positions.

22. The method according to claim 12, further comprising an adjustable gate that is secured to the first and second mounting blocks, the first and second mounting blocks comprising adjustment screws that engage the adjustable gate to alter a radial location of a trailing edge of the adjustable gate with respect to the axis of the cutting head.

23. The method according to claim 12, wherein the cutting head is an annular-shaped cutting head, the slicing machine further comprises an impeller coaxially mounted within the cutting head, the impeller is rotating about the axis of the cutting head in a rotational direction relative to the cutting head, the impeller has means for delivering food products radially outward toward the cutting head, and each of the first and second knives extends radially inward toward the impeller in a direction opposite the rotational direction of the impeller.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 schematically represents a side view in partial cross-section of a slicing machine known in the art.

(2) FIG. 2 is a perspective view representing a cutting head of a type suitable for use with the slicing machine of FIG. 1.

(3) FIG. 3 is a bottom view showing a fragment of the cutting head of FIG. 2, and FIG. 4 is a detailed view of a portion of a clamping assembly of the cutting head.

(4) FIG. 5 is an isolated exploded view of a shoe and a clamping assembly of the cutting head of FIGS. 2 and 3.

(5) FIGS. 6 and 7 are side and cross-sectional views, respectively, of an alternative clamping assembly capable of use with the cutting head of FIG. 2.

(6) FIG. 8 is a perspective view representing a cutting head in accordance with a nonlimiting embodiment of the invention.

(7) FIG. 9 is a perspective view of an individual modular unit of the cutting head of FIG. 8.

(8) FIG. 10 contains isolated perspective and exploded views of the modular unit of FIG. 9.

(9) FIG. 11 is a cross-sectional view of a modular unit of the type represented in FIGS. 8 through 10.

(10) FIG. 12 is a cross-sectional view of the modular unit of FIG. 11 showing the unit in a closed position by which a flat knife is secured to the unit, and FIG. 13 is an end view representing the position of a lever relative to a support ring to which the modular unit of FIG. 12 is mounted.

(11) FIG. 14 is a cross-sectional view of the modular unit of FIGS. 11 and 12 showing the unit in an open position by which the flat knife is released from the unit, and FIG. 15 is an end view representing the position of the lever relative to the support ring.

(12) FIG. 16 is a perspective view of a shaped knife.

(13) FIG. 17 is a cross-sectional view of the modular unit of FIGS. 11, 12 and 14 showing the unit in an open position by which a shaped knife is released from the unit, and FIG. 18 is an end view representing the position of the lever relative to a support ring modified for use with the shaped knife of FIG. 16.

(14) FIG. 19 is a perspective view of a cutting head showing stops for the lever that operates the modular unit in combination with the flat knife as depicted in FIGS. 12 through 15.

(15) FIG. 20 is a perspective view of a cutting head showing stops for the lever that operates the modular unit in combination with the shaped knife as depicted in FIGS. 17 and 18.

(16) FIGS. 21, 22 and 23 are perspective views evidencing the modularity of the modular unit of FIGS. 8 through 20.

(17) FIGS. 24 and 25 are end views of cutting heads showing the modular unit of FIGS. 8 through 23 installed on support rings of different size (diameters).

DETAILED DESCRIPTION OF THE INVENTION

(18) FIG. 8 represents a cutting head 62 that is capable of use with a variety of cutting machines, including the slicing machine 10 depicted in FIG. 1, and in some instances may be a modification or retrofit for such a machine. FIGS. 9 through 25 contain various views of nonlimiting embodiments that utilize one or more modular units 76 to secure knives 70 to the cutting head 62. The cutting head 62 will be described hereinafter in reference to the slicing machine 10 of FIG. 1 equipped with an impeller 14 as described in reference to FIG. 1, and as such the following discussion will focus primarily on certain aspects of the invention, whereas other aspects not discussed in any detail may be, in terms of structure, function, materials, etc., essentially as was described in reference to FIGS. 1 through 7. However, it will be appreciated that the teachings of the invention are more generally applicable to other types of cutting machines.

(19) To facilitate the description provided below of the embodiments represented in the drawings, relative terms, including but not limited to, “vertical,” “horizontal,” “lateral,” “front,” “rear,” “side,” “forward,” “rearward,” “upper,” “lower,” “above,” “below,” “right,” “left,” etc., may be used in reference to the orientation of the cutting head 62 as it would be mounted in the machine 10 of FIG. 1. On the basis of a coaxial arrangement of the cutting head 62 and the impeller 14 of the machine 10, relative terms including but not limited to “axial,” “circumferential,” “radial,” etc., and related forms thereof may also be used below to describe the nonlimiting embodiments represented in the drawings. All such relative terms are intended to indicate the construction and relative orientations of components and features of the cutting head 62, and therefore are relative terms that are useful to describe the illustrated embodiments but should not be otherwise interpreted as limiting the scope of the invention.

(20) In the isolated view of FIG. 8, the cutting head 62 can be seen to be generally annular-shaped with cutting knives 70 mounted at its perimeter. Each knife 70 projects radially inward in a direction generally opposite the direction of rotation of the impeller 14 within the cutting head 62, and defines a cutting edge at its radially innermost extremity. The cutting head 62 shown in FIG. 8 further comprises lower and upper support rings 72 and ring 74 to and between which the circumferentially-spaced modular units 76 are mounted. The knives 70 of the cutting head 62 are individually secured with clamping assemblies 78 to the modular units 76. As more readily evident in FIGS. 9, 10, and 11, the clamping assembly 78 of each modular unit 76 includes a knife holder 80 mounted with fasteners 82 to and between a pair of mounting blocks 84, which in turn are configured to be secured to the support rings 72 and 74 with fasteners 86. Due to the positions of the rings 72 and 74 in the cutting head 62, the mounting blocks 84 are spaced apart in an axial direction of the cutting head 62. The fasteners 86 preferably rigidly secure the mounting blocks 84 to the rings 72 and 74. The clamping assembly 78 further includes a clamp 81 mounted between the mounting blocks 84 so that the clamp 81 is positioned on the radially outward-facing side of the holder 80 to secure the knife 70 thereto. The clamp 81 is preferably pivotably mounted to the mounting blocks 84, and in the embodiment shown the fasteners 86 that secure the mounting blocks 84 to the rings 72 and 74 extend through the blocks 84 to also serve as pivot pins for the clamp 81. The mounting blocks 84 are equipped with pins 88 that engage holes in the support rings 72 and 74. By appropriately locating the holes in the rings 72 and 74, the orientation of the mounting blocks 84, and consequently the knife 70, knife holder 80, and clamp 81 mounted thereto, can be used to alter the radial location of the cutting edge of the knife 70 with respect to the axis of the cutting head 62, thereby providing relatively coarse control of the thickness of the sliced food product. FIGS. 8 through 11 further show each modular unit 76 as comprising an adjustable gate 90 secured to the mounting blocks 84 with fasteners 92. A food product crosses the gate 90 prior to encountering the knife 70 mounted to the succeeding modular unit 76. To provide relatively fine control of the thickness of the sliced food product, the mounting blocks 84 are equipped with adjustment screws 94 that engage the gates 90 to alter the radial location of a trailing edge 96 of the gate 90 relative to the cutting edge of the succeeding knife 70.

(21) As more readily apparent from FIGS. 10 and 11, the knife 70 is supported by a radially outer surface of the knife holder 80, and the clamp 81 overlies the holder 80 so that the knife 70 is between the surface of the holder 80 and a radially inward surface of the clamp 81 that faces the holder 80. Alignment of the knife 70, holder 80, and clamp 81 is achieved with pins 98 that protrude from the knife holder 80 into complementary slots and holes in, respectively, the knife 70 and clamp 81. As evident from FIG. 11, by forcing the clamp 81 toward the holder 80, an extension 81A of the clamp 81 will apply a clamping force to the knife 70 adjacent its cutting edge. According to a preferred aspect of the invention, an eccentric cam rod 100 is used as a quick-clamping feature to apply the clamping force to the clamp 81. The cam rod 100 passes through holes 102 in the mounting blocks 84 and through complementary holes 104 on upstanding flanges 81B (FIG. 11) located at opposite ends of the clamp 81 to loosely assemble the clamp 81 to the mounting blocks 84 in combination with the pivot axis of the clamp 81 created by the fasteners 86.

(22) The cam rod 100 comprises a camming portion 106 that engages and disengages the clamp 81 when the rod 100 is rotated between clamping and release positions, which serve to secure and release, respectively, the knife 70. The release position is depicted in FIG. 11 and results from the camming portion 106 being disengaged from the clamp 81, whereas clockwise rotation of the rod 100 (as viewed in FIG. 11) causes its camming portion 106 to eccentrically move into engagement with the surface of the clamp 81, forcing the clamp 81 into engagement with the knife 70. The force applied to the clamp 81 by the camming portion 106 can be released by rotating the cam rod 100 counterclockwise.

(23) In the illustrated embodiment, the cam rod 100 is rotatably mounted to the mounting blocks 84 of the modular unit 76 as a result of its oppositely-disposed ends 105 being received in the holes 102 formed in the blocks 84. The ends 105 of the cam rod 100 are preferably coaxial, whereas the camming portion 106 between the ends 105 is eccentric to the ends 105 as well as the holes 102 in which the ends 105 are received, in other words, the axis of the camming portion 106 is parallel but not coaxial with the ends 105 of the cam rod 100. The rod 100 is able to rotate within the holes 102 between the aforementioned clamping and release positions. A handle 108 is provided at one end of the rod 100 to facilitate its rotation by hand. In the illustrated embodiment, the handle 108 is attached to the rod 100 so as to be disposed above the support ring 74 as seen in FIGS. 8 and 9.

(24) The operation of the modular unit 76 will now be discussed in reference to FIGS. 12 through 15, which represent the knife 70 as having a straight cutting edge for producing flat slices. Knives having straight cutting edges will be referred to herein as “flat” knives. As will be subsequently discussed in reference to FIGS. 16 through 19, knives of other shapes can be used to produce sliced, strip-cut, shredded and granulated products.

(25) In FIG. 12, which shows the cam rod 100 in its clamping position, the camming portion 106 is represented as having a cylindrical shape that defines an arcuate camming surface, which contacts the outer surface of the clamp 81 and forces the clamp 81 toward the knife holder 80. In the clamping position, the camming portion 106 is at its closest proximity to the knife holder 80 due to the eccentricity of the camming portion 106, with the result that the camming portion 106 applies an increasingly greater force to the clamp 81 as the camming portion 106 is rotated in the clamping direction (clockwise in FIGS. 12 through 15). As a result, the knife 70 is clamped between the knife holder 80 and clamp 81. FIG. 13 represents the clamping position of the cam rod 100 as being established by a stop 112 defined by the support ring 74. The stop 112 limits the clockwise rotation of the cam rod 100, which has a protrusion (pin) 116 that abuts the stop 112 when the cam rod 100 is in the clamping position.

(26) The nonlimiting embodiment of the camming portion 106 shown in the drawings further comprises a planar surface 110, represented as lying on a chord of the otherwise circular cross-sectional outline defined by the camming portion 106. As seen in FIG. 12, the planar surface 110 faces away from the clamp 81 when the camming portion 106 is in the clamping position. The planar surface 110 is preferably present on the camming portion 106 to provide greater clearance for slices that travel over the knife 70 and the outer surface of the clamp 81 as the slices exit the cutting head 62.

(27) The result of rotating the camming portion 106 of the rod 100 to its release position (counterclockwise in FIG. 12) is depicted in FIG. 14, which shows the camming portion 106 as being rotated out of engagement with the clamp 81 to release the force that had been applied by the rod 100 against the clamp 81. In the release position, which is represented in the drawings as the result of rotating the camming portion 106 about ninety degrees from its clamping position, the camming portion 106 is at an intermediate distance from the knife holder 80 due to its eccentricity. The camming portion 106 can be seen to have engaged the rim of the hole 104 in the clamp 81, causing the clamp 81 to pivot radially outward about its pivot (fastener 86) and disengage the knife 70. From FIG. 14, it should be apparent that rotating the camming portion 106 about 180 degrees from the clamping position would result in the camming portion 106 being at its greatest distance from the knife holder 80. However, the rotation of the cam rod 100 is limited by a stop 114 defined by the support ring 74, which the rod protrusion 116 abuts when the cam rod 100 is in the release position. Even so, the clamping force applied by the camming portion 106 has been sufficiently released to enable the clamp 81 to be loosened and raised off the surface of the knife 70 as illustrated in FIG. 14. Because the knife 70 is no longer clamped between the knife holder 80 and clamp 81, the knife 70 can be removed from the modular unit 76. From FIGS. 12 through 15, it can be appreciated that the flat knife 70 can be quickly secured and released by rotating the rod 100 between its clamping and release positions.

(28) FIGS. 16 through 19 represent how knives having shapes other than flat can be utilized with the modular unit 76 to produce other than flat sliced products. FIG. 16 represents a nonlimiting example of a “shaped” knife 70 having a cutting edge that defines a periodic pattern of peaks and valleys when viewed edgewise, and FIG. 17 shows the shaped knife 70 of FIG. 16 installed in the modular unit 76. As evident from FIG. 17, the shaped knife 70 has a greater effective thickness than the flat knife 70 of FIGS. 12 through 15, to the extent that the release position of the clamp 81 depicted in FIG. 14 may not be sufficient to release the shaped knife 70. This issue can be addressed by modifying the placement of the stop 114 that determines the release position of the cam rod 100. In particular, FIGS. 17 and 18 represent the result of rotating the camming portion 106 beyond the ninety-degree counterclockwise rotation permitted by the stop 114 of FIGS. 13 and 15. As depicted in FIGS. 17 and 18, the cam rod 100 has been rotated about 180 degrees from the clamping position, resulting in its camming portion 106 being at its greatest distance from the knife holder 80, which as evident from FIG. 17 is sufficient to enable the clamp 81 to release the shaped knife 70.

(29) FIGS. 19 and 20 provide two perspective views to further illustrate different locations of the stop 114 resulting from the support ring 74 of the cutting head 62 being configured for clamping either flat knives 70 (FIG. 19) or shaped knives 70 (FIG. 20). From FIGS. 12 through 20, it should be evident that the extent to which the cam rod 100 is able to accommodate flat and shaped knives 70 can be tailored by the location of the stop 114, without necessitating modifications to the modular unit 76 itself. For example, the support ring 74 may be replaced or its stop 114 relocated or otherwise modified in an appropriate manner. However, a more optimal clamping effect can be achieved by appropriately shaping the knife holder 80 and clamp 81 to be complementary to the shape of the knife 70. The modular unit 76 is able to address this issue as a result of its modular construction, which permits holders 80 and clamps 81 of various configurations to be assembled to the mounting blocks 84. This preferred aspect of the invention is illustrated in FIGS. 21, 22 and 23. FIG. 21 represents the mounting blocks 84 and cam rod 100 as a subassembly 118 of the modular unit 76. In FIG. 22, a flat knife 70 and a knife holder 80 and clamp 81 specifically configured for use with the flat knife 70 (together constituting the clamping assembly 78) have been assembled with the subassembly 118, whereas FIG. 23 represents the same subassembly 118 as having been assembled with a different clamping assembly 78 comprising a shaped knife 70 and a knife holder 80 and clamp 81 specifically configured to have periodic patterns of peaks and valleys that are complementary to peaks and valleys of the shaped knife 70.

(30) FIGS. 24 and 25 further illustrate the versatility of the modular unit 76 in terms of its adaptability for use with support rings 72 and 74 of various configurations and sizes (diameters). In particular, the placements of the mounting blocks 84 of the units 76 differ with respect to the support rings 72 in FIGS. 24 and 25. The trailing edges 96 of the gates 90 in FIG. 25 create larger gate openings 120 with their respective succeeding knives 70, causing the knives 70 in FIG. 25 to produce much thicker slices than what is produced with the identical units 76 shown in FIG. 24.

(31) While the invention has been described in terms of specific or particular embodiments, it should be apparent that alternatives could be adopted by one skilled in the art. For example, the machine 10, cutting head 62, impeller 14, modular units 76, and their respective components could differ in appearance and construction from the embodiments described herein and shown in the drawings, functions of certain components could be performed by components of different construction but capable of a similar (though not necessarily equivalent) function, and various materials could be used in the fabrication of the machine 10, cutting head 62, impeller 14, modular units 76, and their respective components. In addition, the invention encompasses additional or alternative embodiments in which one or more features or aspects of the disclosed embodiment could be eliminated. Accordingly, it should be understood that the invention is not necessarily limited to any embodiment described herein or illustrated in the drawings. It should also be understood that the phraseology and terminology employed above are for the purpose of describing the illustrated embodiment, and do not necessarily serve as limitations to the scope of the invention. Finally, while the appended claims recite certain aspects believed to be associated with the invention, they do not necessarily serve as limitations to the scope of the invention.