US20010038865A1 - Food patty molding machine - Google Patents
Food patty molding machine Download PDFInfo
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- US20010038865A1 US20010038865A1 US09/326,081 US32608199A US2001038865A1 US 20010038865 A1 US20010038865 A1 US 20010038865A1 US 32608199 A US32608199 A US 32608199A US 2001038865 A1 US2001038865 A1 US 2001038865A1
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- reciprocating
- front wall
- rod
- vacuum bar
- compartment
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- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C7/00—Apparatus for pounding, forming, or pressing meat, sausage-meat, or meat products
- A22C7/0023—Pressing means
- A22C7/003—Meat-moulds
- A22C7/0076—Devices for making meat patties
- A22C7/0084—Devices for making meat patties comprising a reciprocating plate
Definitions
- the present invention is directed to a food patty molding machine and in particular to improvements to the operating structure of a known food patty molding machine such as described in FIGS. 1 through 8B.
- FIGS. 1 - 8 B A FORMAX-12 brand food patty molding or forming machine 30 manufactured by Formax, Inc., of Mokena, Ill., U.S.A. is shown in FIGS. 1 - 8 B. The operation of the machine is generally described in U.S. Pat. Nos. 4,182,003; 4,054,967; and 3,952,478, herein incorporated by reference.
- This machine includes a sheet metal housing 34 which encloses the mechanical equipment of the machine.
- the housing is supported on wheels 35 a and/or leveling legs 35 b.
- a hopper 36 is situated at an elevated position on the machine.
- the hopper includes an open top 40 for receiving bulk food products, for example, whole muscle chicken or ground beef.
- a pair of feed screws within the hopper drives the food product into a pump box area 44 where a reciprocating pump 45 (FIG. 2) presses the food product into mold cavities 46 (shown in FIG. 9) of a reciprocating mold plate 47 .
- the mold plate is reciprocated out of the pump box area to a knock-out area 50 where knock-out cups 52 push the formed meat product or patties out of the cavities and onto a conveyer 56 (FIG. 2).
- a paper placing station 58 includes mechanisms to interleave paper between patties during the dropping of the patties onto the conveyor.
- FIG. 2 illustrates the machine of FIG. 1 with an access door 57 open.
- the knock-out cups 52 are held on a horizontal bar 60 which is supported by two spaced apart knock-out bar arms 64 .
- the knock-out bar arms 64 are clamped to two vertical, reciprocating knock-out rods 70 .
- the rods 70 are journaled or supported at positions 71 a on a mold cover 71 below the knock-out bar arms 64 .
- the rods 70 are driven by the rotation of cams 72 which are mounted on a cam shaft 73 rotationally mounted to the machine frame.
- the cam shaft 73 is driven to rotate by a sprocket 74 .
- the sprocket is driven by a drive chain 75 , which is driven by the power train of the machine.
- the cams 72 have cut-out, flat regions 78 .
- Knock-out arms 79 are pivotally connected to the machine frame at a bolt or axle or pivoting connection 79 a and have arcuate ends 80 which slide along the rotating cam surface 84 .
- the knock-out arms 79 rotate downwardly in the direction R, and then rotate upwardly in a reverse direction when the flat regions 78 have passed.
- rotation of the cams 84 causes an up and down pivoting of the knock-out arms 79 about the connection 79 a.
- An opposite end 90 of each of the knock-out arms is connected to one knock-out rod 70 by a bolted linkage 92 and by a bolt 94 .
- Extending outwardly from each rod 70 is a flag or lug 96 having a hole for receiving a machine screw 98 which is threaded into one of two opposite ends of a spacer rod or tie rod 100 .
- An oil pan 101 is located beneath each cam 72 .
- a front wick 102 made of a woven, sponge or other wick material is located at the pivoting connection 79 a , held in place by a washer 102 a to continuously oil the pivoting connection 79 a.
- a rear wick 103 is held against the cam surface 84 to continuously oil the interface between the section 78 and the end 80 of the knock-out arm 79 .
- the pan has an open top 104 through which the wicks 102 , 103 are dipped.
- the pan 101 holds a supply of oil 105 .
- Each bolted linkage 92 is also connected by a bolt 95 a to a vertical leg 95 b of a moveable plate 95 .
- the plate is held within a guide frame 97 which is mounted by machine screws to a stationary part of the machine frame, at a top of the frame 97 .
- Two springs 95 d are mounted between an upper wall of the frame and a bottom leg 95 c of the plate and resist the upward lifting of the plate within the frame. The springs are therefore the driving downward force generator of the knock-out operation.
- FIG. 4D the springs are shown compressed with the knock-out rod lifted by the associated cam 72 .
- FIG. 6 the springs are expanded, and the knock-out rods have been driven to their downward position.
- the knock-out bar arms 64 are mounted to top ends of the rods 70 .
- the bar arms 64 are each fixed vertically to a rod by a top fastener 64 a, and rotationally by a clamp arrangement 64 b closed by a horizontal fastener 64 c.
- the bar arms 64 are fastened by bolts or machine screws to the horizontal bar 60 which holds the knock-out cups 52 .
- the bar 60 and cups 52 can have a different shape, and/or the bar can carry a different number of cups.
- FIG. 2 Also shown in FIG. 2 is a vacuum bar assembly 106 which reciprocates during operation of the machine as part of a vacuum transfer shuttle or vacuum bar assembly for interleaving flexible paper sheets with formed patties as described in U.S. Pat. Nos. 3,952,478; 4,182,003; or 4,054,967. Also included is a paper placer assembly 107 which places the flexible paper sheets onto the vacuum bar assembly. Both the vacuum bar assembly and the paper placer assembly are driven by reciprocal motion of rods, i.e., by vacuum bar rods 108 , 108 a (see FIG. 8B) having a square cross section, and by a paper placer drive rod 110 having a round cross section, respectively.
- rods i.e., by vacuum bar rods 108 , 108 a (see FIG. 8B) having a square cross section, and by a paper placer drive rod 110 having a round cross section, respectively.
- FIG. 3 illustrates the reciprocating mold plate 47 connected via a hinge assembly 120 to a drive plate or slide plate 124 .
- the drive plate 124 has an elongated rectangular cross section.
- the drive plate 124 , the vacuum bar drive rod 108 and the paper placer drive rod 110 must all penetrate through, and reciprocate through the penetration of, a front wall or skin 130 which separates the food forming front section of the machine from the mechanical compartment. For sanitary reasons, at each penetration a sealing element is provided.
- the drive plate 124 requires a rectangular sealing element 140 bolted to the skin 130 .
- a similar rectangular seal 144 must be provided at the vacuum rod drive bar 108 as it penetrates the skin 130 . Rectangular seals, because of sharp corners are more prone to leakage, and are more expensive than standard circular shaft or rod seals.
- a circular seal 145 can be used at the paper placer drive rod 110 where it penetrates the skin 130 .
- FIG. 4A shows the vacuum bar drive rod or shuttle arm 108 penetrating the skin or wall 130 .
- the rod 108 is connected via an intermediate plate 150 to a rack 152 .
- the rack 152 is driven to reciprocate by a pinion 154 .
- FIGS. 8A and 8B show the arrangement of the vacuum bar drive rod 108 in more detail.
- the rack 152 is slidably held in a channel 153 .
- Each of the rods 108 , 108 a is connected to a rack and driven by a pinion 154 as shown in FIG. 8A.
- Each of the rods 108 , 108 a is connected to one lateral side of the vacuum bar 106 by two machine screws or bolts 156 .
- the rods 108 pass through bearing blocks 160 , 160 a respectively before being connected to the vacuum bar 106 .
- a paper placer drive sprocket 160 rotates a paper placer drive shaft 162 which rotates a paper placer crank arm 163 (shown in FIG. 4C) which drives the paper placer drive rod (via linkages) to reciprocate.
- the crank arm rotates about a horizontal axis of the drive shaft.
- the main drive motor 170 is shown, arranged for driving a drive motor pulley 172 which drives a drive belt 174 .
- the drive belt 174 drives a reducer pulley 176 which inputs rotational power to a mold plate drive reducer 180 (see FIG. 5).
- a reducer output shaft 182 outputs rotational power from the reducer 180 .
- Sprockets and pulleys which are fixed to the output shaft 182 drive various systems including the drive chain 75 for actuating the knock-out rods 70 , and a drive chain 185 for the paper placer sprocket 160 .
- a hydraulic oil tank 186 is located at a front bottom portion of the machine.
- a rear output shaft of the main drive motor 170 drives a hydraulic pump 187 which powers the hydraulic systems of the machine.
- a bottom skin or floor 188 which is located at an elevation equal to a bottom 190 of a bottom horizontal frame member 192 .
- the bottom skin 188 substantially covers a bottom of the machine.
- FIG. 5 illustrates that the drive system for the mold plate includes a long rocker arm 200 which is connected by a slide plate linkage 202 to the slide plate or drive plate 124 .
- Laterally arranged slide bearings 206 a, 206 b receive lateral edges of the slide plate 124 and guide the reciprocating movement of the slide plate 124 therein.
- the lateral bearings 206 a, 206 b are fixed to the machine overhead structure.
- a feed screw gear box 210 for driving the feed screws within the hopper 40 .
- a cabinet blower 211 driven by a motor 212 is used to circulate cooling air or purge air through the housing 34 .
- FIG. 7 shows the drive for the molding plate 47 in more detail.
- the hinge assembly 120 includes fixed hinge plates 214 a, 214 b holding a hinge axle 216 upon which are mounted hinged grippers 218 a, 218 b.
- the axle 216 allows a degree of pivoting between the fixed hinge plates 214 a, 214 b and the grippers 218 a, 218 b respectively.
- the hinged grippers 218 a, 218 b include bottom jaws 219 a, 219 b which are fixed to the upper jaws by machine screws 220 , but when the bottom jaws 219 a, 219 b are released by unscrewing of the machine screws 220 , they can pivot downwardly about the axle 216 to allow downward removal of the mold plate 47 .
- the mold plate 47 is provided with holes for allowing passage of the machine screws 220 .
- the hinge plates 214 a, 214 b are fixed to the slide plate 124 by machine screws 224 which pass through the slide plate 124 and are received into threaded holes in an underlying part of the hinge plates 214 a, 214 b respectively.
- the slide plate linkage 202 includes an adjustable female rod end 230 connected to a clevis 232 which is fixed to the slide plate 124 via a machine screw 236 which is threaded into an underlying part of the U-shaped clevis.
- the slide plate 124 includes a hole for receiving the machine screw 236 .
- a bolt 238 connects the clevis 232 with an eye-bolt of the female rod end 230 . This allows pivoting about the horizontal between the clevis 232 and the female rod end 230 .
- a male rod end 240 is threaded into the female rod end 230 and includes an eye-bolt end 242 for receiving a bolt 246 to allow relative pivoting about the horizontal axis between the male rod end 240 and the long rocker arm 200 .
- a short rocker arm 256 is fixed to the long rocker arm 200 by a shear pin 250 via a shaft 254 .
- the short rocker arm 256 includes an adjustable follower 260 which rides in a shaped cam channel 266 formed in the mold plate drive cam 270 .
- the mold plate drive cam 270 is driven in rotation by the mold plate drive reducer 180 (shown in FIG. 5). The interaction between the short rocker arm, the cam 270 and the long rocker arm causes back and forth reciprocation of the slide plate 124 , and thus the mold plate 47 .
- the inventors have recognized that it would be advantageous to provide an improved patty forming machine, which reduces or eliminates the need for rectangular seals at the front wall of the mechanical compartment.
- the inventors have also recognized that it would be advantageous to provide a patty forming machine having a bottom skin which can be more freely and reliably cleaned and drained.
- the invention provides an improved patty forming machine.
- the invention includes an improved vacuum bar shuttle rod having a circular cross section which is more easily, reliably and economically sealed at its penetration at a wall which separates the mechanical compartment from the patty forming compartment compared to the square cross sectional bars of the prior art machine described in FIGS. 1 - 8 B.
- the invention also provides an improved mold plate drive by replacing a portion of the flat slide plate or drive plate of the prior art machine described in FIGS. 1 - 8 B with two parallel drive rods having circular cross sections. The rods can be more readily, reliably and economically sealed at the wall which separates the mechanical compartment from the patty forming compartment.
- the invention provides an improved housing for the machine in that a bottom floor or bottom “skin” is spaced one inch from the bottom-most horizontal frame for better drainage and cleaning and visual inspection.
- FIG. 2 is a fragmentary, enlarged perspective view of a portion of the machine shown in FIG. 1, with an access door opened to allow viewing inside the cabinetry;
- FIG. 3 is a fragmentary perspective view of a portion of the machine of FIG. 1 with cabinetry opened or removed to allow viewing of mechanical components;
- FIG. 4A is a fragmentary left side, rear elevational view of the machine shown in FIG. 1 with cabinetry removed to view the inside mechanical components;
- FIG. 4B is a fragmentary left side, front elevational view of the machine of FIG. 1 with cabinetry removed to view the internal mechanical components;
- FIG. 4C is a fragmentary right side, rear elevational view of the machine of FIG. 1 with cabinetry either removed or opened to view the inside mechanical components;
- FIG. 5 is a fragmentary rear view of the machine of FIG. 1 with a rear door opened to view inside mechanical components;
- FIG. 8B is an enlarged fragmentary plan view of a vacuum bar connected to left and right vacuum bar shuttle arms, taken from the machine of FIG. 1, shown in isolation from surrounding components for clarity;
- FIG. 9 is a fragmentary right side elevational view of a patty forming machine of the present invention.
- FIG. 9A is a fragmentary front end view of the patty forming machine shown in FIG. 9;
- FIG. 10 is a fragmentary sectional view taken generally along line 10 - 10 from FIG. 9A;
- FIG. 11 is an enlarged fragmentary plan view taken from FIG. 10;
- FIG. 12 is a fragmentary enlarged view taken from FIG. 10;
- FIG. 13 is a sectional view taken generally along line 13 - 13 from FIG. 12;
- FIG. 14A is a sectional view taken generally along line 14 A- 14 A from FIG. 11;
- FIG. 15A is a plan view of a shuttle drive bar taken from FIG. 10;
- FIG. 16 is a fragmentary, enlarged perspective view of a connection detail between mold plate drive rods and a mold plate taken from FIG. 9;
- FIG. 17 is a rear fragmentary perspective view of the patty forming machine of FIG. 9.
- FIG. 9 illustrates a patty forming machine 300 arranged and configured substantially similarly to the machine shown in FIGS. 1 - 8 B except as described below.
- the machine is structurally supported on and within a rectangular space frame 302 having an upper rectangular frame 304 and a lower rectangular frame 306 supported by columns 308 at each corner and intermittently along sides of the frame 302 .
- a plurality of tubular supports 310 extend above the upper rectangular frame 304 to support overhead equipment.
- a skin 314 surrounds a mechanical compartment 318 and includes a bottom skin or floor 320 which has a top surface 322 and a downwardly bent surrounding lip 324 .
- the top surface slopes slightly from its edges to a center region which includes a center drain.
- the bottom skin 320 prevents contamination of the components within the housing 34 caused by spraying or splashing against the floor during operation, or during spray cleaning of the machine.
- the machine 300 provides a gap 326 between a bottom 328 of the lower rectangular frame 306 , which surrounds a perimeter of the mechanical compartment 318 , and the top surface 322 .
- the gap 326 is preferably about one inch and allows for better drainage and cleaning of the bottom skin 320 due to noninterference with the lower frame 306 .
- the gap 326 is accessible upon opening of a cabinet doors and panels and allows a more effective viewing of the top surface 322 of the skin 320 .
- the mechanical compartment 318 is separated from a patty molding area by a front barrier wall 342 and a top barrier wall 344 .
- a recovery pan 346 connected to the front barrier wall 342 overlies the top barrier wall 344 .
- the mold plate 47 is driven into reciprocation by two parallel mold plate drive rods 350 , 352 (see FIG. 9A).
- the drive rods 350 , 352 each pierce through the barrier wall 342 through a seal assembly 356 , 358 respectively (see FIG. 10).
- the seals 356 , 358 provide a sealing and wiping action and are preferably rod wiper type seals for round rods. These seals are two-component seals having a seal body 360 and a back side lock nut 362 .
- a hinge assembly 364 As shown in FIG. 16.
- the hinge assembly 364 functions substantially the same as the hinge assembly 120 described in FIG. 7 except that the rods 350 , 352 are connected to the hinge assembly 364 via the hinge axle 366 and end retaining machine screws 368 a, 368 b.
- the rods 350 , 352 as well as the hinge assembly 364 and the plate 47 are shown in two positions in FIG. 10: a forward-most position (shown solid) and a rear retracted position (shown in phantom).
- the rods 350 , 352 extend rearwardly within the mechanical compartment 318 to a fully retracted position shown in phantom in FIG. 9.
- the parallel rods, 350 , 352 are guided in linear rod bearings 370 , 372 , 374 , 376 which are each fixed to a top structure plate 380 which is supported and fixed by the columns 310 .
- the bearings 370 , 372 , 374 , 376 are each formed of upper and lower halves which are bolted together by way of machine screws 386 .
- the bearing 372 is shown in FIG. 17.
- the bearing 370 is identically fashioned.
- the bearings 374 , 376 are configured in mirror image fashion.
- the bearing 372 includes a top bearing 390 which is fixed to a bottom bearing 392 by the fasteners 386 which can also be used, given sufficient length, to fasten the bearing assembly 372 to threaded holes in the overhead structure 380 .
- the upper and lower bearing halves 390 , 392 each include C-shaped bearing surfaces 400 which are treated with a Teflon or other friction reducing bearing material, or alternatively have rollers or other friction reducing members therein.
- the bearing halves 390 , 392 provide an inside longitudinal gap 404 for allowing the lengthwise movement of a slide plate 406 through the bearing 372 .
- the slide plate 406 is fastened to the rod 350 along one lateral side thereof, and fastened to the rod 352 along an opposite lateral side thereof by a plurality of spaced apart fasteners 408 .
- a further improvement of the present invention involves the structure of a vacuum arm shuttle rod 450 .
- This rod 450 unlike the vacuum bar shuttle arms 108 , 108 a shown in FIGS. 8A and 8B, has a round cross section. This facilitates the use of an annular seal 454 at the barrier wall 342 , such as a rod wiper type seal. Similar to the seals 356 , 358 , the seal 454 is a two piece annular seal.
- FIGS. 11, 14A and 14 B illustrate the rod 450 having a flat section 456 having a keyway 460 for receiving an intermediate plate 462 which connects to a rack 464 .
- the rod 450 , the intermediate plate 462 and the rack 464 are fastened by machine screws or bolts 466 .
- the rack 464 is reciprocally driven by a pinion such as the pinion 154 as previously described in FIG. 8A, with regard to driving the rack 152 .
- two rods 450 , two racks 464 and two plates 462 are arranged in two assemblies which are assembled in mirror image fashion on opposite sides of the machine and connected to the bar 106 to operate in tandem as described above with regard to the prior art rods 108 , 108 a.
- FIG. 13 shows in section the vacuum shuttle bar 450 connected to the vacuum bar 106 using a threaded stud 480 threaded into the rod 450 , and having an overlying nut 482 drawn tight on the stud, onto the vacuum bar 106 .
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Abstract
Description
- This application is a non-provisional application claiming benefit of prior filed provisional application U.S. Ser. No. 60/088,303 filed Jun. 5, 1998.
- Not Applicable
- The present invention is directed to a food patty molding machine and in particular to improvements to the operating structure of a known food patty molding machine such as described in FIGS. 1 through 8B.
- A FORMAX-12 brand food patty molding or forming
machine 30 manufactured by Formax, Inc., of Mokena, Ill., U.S.A. is shown in FIGS. 1-8B. The operation of the machine is generally described in U.S. Pat. Nos. 4,182,003; 4,054,967; and 3,952,478, herein incorporated by reference. - This machine includes a
sheet metal housing 34 which encloses the mechanical equipment of the machine. The housing is supported onwheels 35 a and/or leveling legs 35 b. Ahopper 36 is situated at an elevated position on the machine. The hopper includes anopen top 40 for receiving bulk food products, for example, whole muscle chicken or ground beef. A pair of feed screws within the hopper (not shown) drives the food product into apump box area 44 where a reciprocating pump 45 (FIG. 2) presses the food product into mold cavities 46 (shown in FIG. 9) of a reciprocatingmold plate 47. The mold plate is reciprocated out of the pump box area to a knock-outarea 50 where knock-outcups 52 push the formed meat product or patties out of the cavities and onto a conveyer 56 (FIG. 2). Apaper placing station 58 includes mechanisms to interleave paper between patties during the dropping of the patties onto the conveyor. - FIG. 2 illustrates the machine of FIG. 1 with an
access door 57 open. The knock-outcups 52 are held on ahorizontal bar 60 which is supported by two spaced apart knock-outbar arms 64. The knock-outbar arms 64 are clamped to two vertical, reciprocating knock-outrods 70. Therods 70 are journaled or supported at positions 71a on a mold cover 71 below the knock-outbar arms 64. - As shown more clearly in FIG. 6, the
rods 70 are driven by the rotation ofcams 72 which are mounted on acam shaft 73 rotationally mounted to the machine frame. Thecam shaft 73 is driven to rotate by asprocket 74. The sprocket is driven by adrive chain 75, which is driven by the power train of the machine. - The
cams 72 have cut-out,flat regions 78. Knock-outarms 79 are pivotally connected to the machine frame at a bolt or axle or pivoting connection 79 a and havearcuate ends 80 which slide along the rotatingcam surface 84. When theends 80 reach the cut out,flat regions 78 of the cams, the knock-outarms 79 rotate downwardly in the direction R, and then rotate upwardly in a reverse direction when theflat regions 78 have passed. Thus, rotation of thecams 84 causes an up and down pivoting of the knock-outarms 79 about the connection 79 a. Anopposite end 90 of each of the knock-out arms is connected to one knock-outrod 70 by abolted linkage 92 and by abolt 94. Extending outwardly from eachrod 70 is a flag orlug 96 having a hole for receiving amachine screw 98 which is threaded into one of two opposite ends of a spacer rod ortie rod 100. - An
oil pan 101 is located beneath eachcam 72. One will be described, the respective other is mirror image identical. Afront wick 102 made of a woven, sponge or other wick material, is located at the pivoting connection 79 a, held in place by a washer 102 a to continuously oil the pivoting connection 79 a. Arear wick 103 is held against thecam surface 84 to continuously oil the interface between thesection 78 and theend 80 of the knock-outarm 79. The pan has an open top 104 through which thewicks pan 101 holds a supply of oil 105. - Each
bolted linkage 92 is also connected by abolt 95 a to a vertical leg 95 b of a moveable plate 95. The plate is held within aguide frame 97 which is mounted by machine screws to a stationary part of the machine frame, at a top of theframe 97. Twosprings 95 d are mounted between an upper wall of the frame and a bottom leg 95 c of the plate and resist the upward lifting of the plate within the frame. The springs are therefore the driving downward force generator of the knock-out operation. In FIG. 4D the springs are shown compressed with the knock-out rod lifted by the associatedcam 72. In FIG. 6, the springs are expanded, and the knock-out rods have been driven to their downward position. - The knock-out
bar arms 64 are mounted to top ends of therods 70. Thebar arms 64 are each fixed vertically to a rod by a top fastener 64 a, and rotationally by aclamp arrangement 64 b closed by a horizontal fastener 64 c. Thebar arms 64 are fastened by bolts or machine screws to thehorizontal bar 60 which holds the knock-outcups 52. Depending on the product being formed, thebar 60 andcups 52 can have a different shape, and/or the bar can carry a different number of cups. - Also shown in FIG. 2 is a
vacuum bar assembly 106 which reciprocates during operation of the machine as part of a vacuum transfer shuttle or vacuum bar assembly for interleaving flexible paper sheets with formed patties as described in U.S. Pat. Nos. 3,952,478; 4,182,003; or 4,054,967. Also included is apaper placer assembly 107 which places the flexible paper sheets onto the vacuum bar assembly. Both the vacuum bar assembly and the paper placer assembly are driven by reciprocal motion of rods, i.e., byvacuum bar rods 108, 108 a (see FIG. 8B) having a square cross section, and by a paperplacer drive rod 110 having a round cross section, respectively. - FIG. 3 illustrates the
reciprocating mold plate 47 connected via ahinge assembly 120 to a drive plate orslide plate 124. Thedrive plate 124 has an elongated rectangular cross section. Thedrive plate 124, the vacuumbar drive rod 108 and the paperplacer drive rod 110 must all penetrate through, and reciprocate through the penetration of, a front wall orskin 130 which separates the food forming front section of the machine from the mechanical compartment. For sanitary reasons, at each penetration a sealing element is provided. Thedrive plate 124 requires arectangular sealing element 140 bolted to theskin 130. A similar rectangular seal 144 must be provided at the vacuumrod drive bar 108 as it penetrates theskin 130. Rectangular seals, because of sharp corners are more prone to leakage, and are more expensive than standard circular shaft or rod seals. Acircular seal 145 can be used at the paperplacer drive rod 110 where it penetrates theskin 130. - FIG. 4A shows the vacuum bar drive rod or
shuttle arm 108 penetrating the skin orwall 130. Therod 108 is connected via anintermediate plate 150 to arack 152. Therack 152 is driven to reciprocate by apinion 154. - FIGS. 8A and 8B show the arrangement of the vacuum
bar drive rod 108 in more detail. Therack 152 is slidably held in achannel 153. It is to be noted that there are twodrive rods 108, 108 a arranged on a right side and a left side of the machine respectively. Each of therods 108, 108 a is connected to a rack and driven by apinion 154 as shown in FIG. 8A. Each of therods 108, 108 a is connected to one lateral side of thevacuum bar 106 by two machine screws or bolts 156. Therods 108 pass through bearingblocks 160, 160 a respectively before being connected to thevacuum bar 106. A paperplacer drive sprocket 160 rotates a paperplacer drive shaft 162 which rotates a paper placer crank arm 163 (shown in FIG. 4C) which drives the paper placer drive rod (via linkages) to reciprocate. The crank arm rotates about a horizontal axis of the drive shaft. - Returning to FIGS. 4A and 4B, the
main drive motor 170 is shown, arranged for driving adrive motor pulley 172 which drives adrive belt 174. Thedrive belt 174 drives areducer pulley 176 which inputs rotational power to a mold plate drive reducer 180 (see FIG. 5). Areducer output shaft 182 outputs rotational power from thereducer 180. Sprockets and pulleys which are fixed to theoutput shaft 182 drive various systems including thedrive chain 75 for actuating the knock-outrods 70, and a drive chain 185 for thepaper placer sprocket 160. Ahydraulic oil tank 186 is located at a front bottom portion of the machine. A rear output shaft of themain drive motor 170 drives ahydraulic pump 187 which powers the hydraulic systems of the machine. Also shown in FIG. 4B is a bottom skin orfloor 188 which is located at an elevation equal to abottom 190 of a bottomhorizontal frame member 192. Thebottom skin 188 substantially covers a bottom of the machine. - FIG. 5 illustrates that the drive system for the mold plate includes a
long rocker arm 200 which is connected by aslide plate linkage 202 to the slide plate or driveplate 124. Laterally arranged slide bearings 206 a, 206 b receive lateral edges of theslide plate 124 and guide the reciprocating movement of theslide plate 124 therein. The lateral bearings 206 a, 206 b are fixed to the machine overhead structure. Also shown is a feedscrew gear box 210 for driving the feed screws within thehopper 40. A cabinet blower 211 driven by amotor 212 is used to circulate cooling air or purge air through thehousing 34. - FIG. 7 shows the drive for the
molding plate 47 in more detail. Thehinge assembly 120 includes fixed hinge plates 214 a, 214 b holding ahinge axle 216 upon which are mounted hinged grippers 218 a, 218 b. Theaxle 216 allows a degree of pivoting between the fixed hinge plates 214 a, 214 b and the grippers 218 a, 218 b respectively. The hinged grippers 218 a, 218 b include bottom jaws 219 a, 219 b which are fixed to the upper jaws bymachine screws 220, but when the bottom jaws 219 a, 219 b are released by unscrewing of themachine screws 220, they can pivot downwardly about theaxle 216 to allow downward removal of themold plate 47. Themold plate 47 is provided with holes for allowing passage of the machine screws 220. The hinge plates 214 a, 214 b are fixed to theslide plate 124 bymachine screws 224 which pass through theslide plate 124 and are received into threaded holes in an underlying part of the hinge plates 214 a, 214 b respectively. - The
slide plate linkage 202 includes an adjustablefemale rod end 230 connected to aclevis 232 which is fixed to theslide plate 124 via amachine screw 236 which is threaded into an underlying part of the U-shaped clevis. Theslide plate 124 includes a hole for receiving themachine screw 236. Abolt 238 connects theclevis 232 with an eye-bolt of thefemale rod end 230. This allows pivoting about the horizontal between theclevis 232 and thefemale rod end 230. A male rod end 240 is threaded into thefemale rod end 230 and includes an eye-bolt end 242 for receiving abolt 246 to allow relative pivoting about the horizontal axis between the male rod end 240 and thelong rocker arm 200. A short rocker arm 256 is fixed to thelong rocker arm 200 by ashear pin 250 via a shaft 254. The short rocker arm 256 includes anadjustable follower 260 which rides in a shapedcam channel 266 formed in the moldplate drive cam 270. The moldplate drive cam 270 is driven in rotation by the mold plate drive reducer 180 (shown in FIG. 5). The interaction between the short rocker arm, thecam 270 and the long rocker arm causes back and forth reciprocation of theslide plate 124, and thus themold plate 47. - The inventors have recognized that it would be advantageous to provide an improved patty forming machine, which reduces or eliminates the need for rectangular seals at the front wall of the mechanical compartment. The inventors have also recognized that it would be advantageous to provide a patty forming machine having a bottom skin which can be more freely and reliably cleaned and drained.
- The invention provides an improved patty forming machine. Particularly, the invention includes an improved vacuum bar shuttle rod having a circular cross section which is more easily, reliably and economically sealed at its penetration at a wall which separates the mechanical compartment from the patty forming compartment compared to the square cross sectional bars of the prior art machine described in FIGS.1-8B. The invention also provides an improved mold plate drive by replacing a portion of the flat slide plate or drive plate of the prior art machine described in FIGS. 1-8B with two parallel drive rods having circular cross sections. The rods can be more readily, reliably and economically sealed at the wall which separates the mechanical compartment from the patty forming compartment. Additionally, the invention provides an improved housing for the machine in that a bottom floor or bottom “skin” is spaced one inch from the bottom-most horizontal frame for better drainage and cleaning and visual inspection.
- Numerous other advantages and features of the present invention will become readily apparent from the following detailed description of the invention and the embodiments thereof, and from the accompanying drawings in which details of the invention are fully and completely disclosed as part of this specification.
- FIG. 1 is a perspective view of a prior art patty forming machine;
- FIG. 2 is a fragmentary, enlarged perspective view of a portion of the machine shown in FIG. 1, with an access door opened to allow viewing inside the cabinetry;
- FIG. 3 is a fragmentary perspective view of a portion of the machine of FIG. 1 with cabinetry opened or removed to allow viewing of mechanical components;
- FIG. 4A is a fragmentary left side, rear elevational view of the machine shown in FIG. 1 with cabinetry removed to view the inside mechanical components;
- FIG. 4B is a fragmentary left side, front elevational view of the machine of FIG. 1 with cabinetry removed to view the internal mechanical components;
- FIG. 4C is a fragmentary right side, rear elevational view of the machine of FIG. 1 with cabinetry either removed or opened to view the inside mechanical components;
- FIG. 4D is a fragmentary front end view of the machine of FIG. 1 with cabinetry removed to view inside mechanical components;
- FIG. 5 is a fragmentary rear view of the machine of FIG. 1 with a rear door opened to view inside mechanical components;
- FIG. 6 is a partially exploded, fragmentary, enlarged perspective view of a patty knock-out system of the machine shown in FIG. 1, isolated from surrounding components for clarity;
- FIG. 7 is an enlarged, fragmentary, partially exploded, perspective view of a mold plate driving system from the machine shown in FIG. 1 viewed in isolation from surrounding components for clarity;
- FIG. 8A is an enlarged, fragmentary, perspective view of a vacuum bar shuttle system from the machine in FIG. 1, shown in isolation from surrounding components for clarity;
- FIG. 8B is an enlarged fragmentary plan view of a vacuum bar connected to left and right vacuum bar shuttle arms, taken from the machine of FIG. 1, shown in isolation from surrounding components for clarity;
- FIG. 9 is a fragmentary right side elevational view of a patty forming machine of the present invention;
- FIG. 9A is a fragmentary front end view of the patty forming machine shown in FIG. 9;
- FIG. 10 is a fragmentary sectional view taken generally along line10-10 from FIG. 9A;
- FIG. 11 is an enlarged fragmentary plan view taken from FIG. 10;
- FIG. 12 is a fragmentary enlarged view taken from FIG. 10;
- FIG. 13 is a sectional view taken generally along line13-13 from FIG. 12;
- FIG. 14A is a sectional view taken generally along
line 14A-14A from FIG. 11; - FIG. 14B is a sectional view taken generally along line14B-14B from FIG. 11;
- FIG. 15A is a plan view of a shuttle drive bar taken from FIG. 10;
- FIG. 15B is an elevational view of the shuttle drive bar of FIG. 15A;
- FIG. 16 is a fragmentary, enlarged perspective view of a connection detail between mold plate drive rods and a mold plate taken from FIG. 9; and
- FIG. 17 is a rear fragmentary perspective view of the patty forming machine of FIG. 9.
- While this invention is susceptible of embodiment in many different forms, there are shown in the drawings and will be described herein in detail specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiments illustrated.
- FIG. 9 illustrates a
patty forming machine 300 arranged and configured substantially similarly to the machine shown in FIGS. 1-8B except as described below. The machine is structurally supported on and within arectangular space frame 302 having an upperrectangular frame 304 and a lowerrectangular frame 306 supported by columns 308 at each corner and intermittently along sides of theframe 302. A plurality oftubular supports 310 extend above the upperrectangular frame 304 to support overhead equipment. Askin 314 surrounds amechanical compartment 318 and includes a bottom skin or floor 320 which has atop surface 322 and a downwardly bentsurrounding lip 324. The top surface slopes slightly from its edges to a center region which includes a center drain. The bottom skin 320 prevents contamination of the components within thehousing 34 caused by spraying or splashing against the floor during operation, or during spray cleaning of the machine. Themachine 300 provides agap 326 between a bottom 328 of the lowerrectangular frame 306, which surrounds a perimeter of themechanical compartment 318, and thetop surface 322. Thegap 326 is preferably about one inch and allows for better drainage and cleaning of the bottom skin 320 due to noninterference with thelower frame 306. Thegap 326 is accessible upon opening of a cabinet doors and panels and allows a more effective viewing of thetop surface 322 of the skin 320. - The
mechanical compartment 318 is separated from a patty molding area by afront barrier wall 342 and atop barrier wall 344. Arecovery pan 346 connected to thefront barrier wall 342 overlies thetop barrier wall 344. Themold plate 47 is driven into reciprocation by two parallel mold plate driverods 350, 352 (see FIG. 9A). Thedrive rods barrier wall 342 through aseal assembly seals seal body 360 and a back side lock nut 362. At a front end of therods hinge assembly 364 as shown in FIG. 16. Thehinge assembly 364 functions substantially the same as thehinge assembly 120 described in FIG. 7 except that therods hinge assembly 364 via the hinge axle 366 and end retaining machine screws 368 a, 368 b. - The
rods hinge assembly 364 and theplate 47 are shown in two positions in FIG. 10: a forward-most position (shown solid) and a rear retracted position (shown in phantom). - The
rods mechanical compartment 318 to a fully retracted position shown in phantom in FIG. 9. The parallel rods, 350, 352 are guided inlinear rod bearings columns 310. Thebearings machine screws 386. - The
bearing 372 is shown in FIG. 17. Thebearing 370 is identically fashioned. Thebearings 374, 376 are configured in mirror image fashion. Thebearing 372 includes atop bearing 390 which is fixed to a bottom bearing 392 by thefasteners 386 which can also be used, given sufficient length, to fasten the bearingassembly 372 to threaded holes in the overhead structure 380. The upper and lower bearinghalves 390, 392 each include C-shaped bearing surfaces 400 which are treated with a Teflon or other friction reducing bearing material, or alternatively have rollers or other friction reducing members therein. The bearinghalves 390, 392 provide an insidelongitudinal gap 404 for allowing the lengthwise movement of aslide plate 406 through thebearing 372. Theslide plate 406 is fastened to therod 350 along one lateral side thereof, and fastened to therod 352 along an opposite lateral side thereof by a plurality of spaced apartfasteners 408. - The
long rocker arm 200 is connected to theslide plate 406 in identical fashion to the connection between thelong rocker arm 200 and theslide plate 124 as shown in FIG. 7, that is, using the clevis, female rod end, male rod end and associated bolts. Thelong rocker arm 200 is connected to a slide plate driving system, including thecam plate 270, substantially as shown in FIG. 7. Reciprocal pivoting of thelong rocker arm 200 causes the longitudinal reciprocation of theslide plate 406 and the tworods bearings - A further improvement of the present invention involves the structure of a vacuum
arm shuttle rod 450. Thisrod 450, unlike the vacuumbar shuttle arms 108, 108 a shown in FIGS. 8A and 8B, has a round cross section. This facilitates the use of anannular seal 454 at thebarrier wall 342, such as a rod wiper type seal. Similar to theseals seal 454 is a two piece annular seal. - FIGS. 11, 14A and14B illustrate the
rod 450 having aflat section 456 having akeyway 460 for receiving anintermediate plate 462 which connects to arack 464. Therod 450, theintermediate plate 462 and therack 464 are fastened by machine screws orbolts 466. Therack 464 is reciprocally driven by a pinion such as thepinion 154 as previously described in FIG. 8A, with regard to driving therack 152. - As shown in FIG. 10, two
rods 450, tworacks 464 and twoplates 462 are arranged in two assemblies which are assembled in mirror image fashion on opposite sides of the machine and connected to thebar 106 to operate in tandem as described above with regard to theprior art rods 108, 108 a. - FIGS. 15A and 15B show the
rod 450 in isolation including theflat end 456 andkeyway 460. FIG. 12 shows thevacuum bar 106 connected to an opposite end of therod 450, particularly on a topflat surface 470 thereof. The flat surface is also shown in FIGS. 15A and 15B. Two positions of thevacuum bar 106 are shown (one shown solid and one shown in phantom) corresponding to the reciprocation of therod 450. Therod 450 also passes through abearing support 472 between theintermediate plate 462 and thevacuum bar 106. - FIG. 13 shows in section the
vacuum shuttle bar 450 connected to thevacuum bar 106 using a threadedstud 480 threaded into therod 450, and having anoverlying nut 482 drawn tight on the stud, onto thevacuum bar 106. - From the foregoing, it will be observed that numerous variations and modifications may be effected without departing from the spirit and scope of the invention. It is to be understood that no limitation with respect to the specific apparatus illustrated herein is intended or should be inferred.
Claims (12)
Priority Applications (1)
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US09/326,081 US6428303B2 (en) | 1998-06-05 | 1999-06-04 | Food patty molding machine |
Applications Claiming Priority (2)
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US8830398P | 1998-06-05 | 1998-06-05 | |
US09/326,081 US6428303B2 (en) | 1998-06-05 | 1999-06-04 | Food patty molding machine |
Publications (2)
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US20010038865A1 true US20010038865A1 (en) | 2001-11-08 |
US6428303B2 US6428303B2 (en) | 2002-08-06 |
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US09/326,081 Expired - Lifetime US6428303B2 (en) | 1998-06-05 | 1999-06-04 | Food patty molding machine |
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US7163391B2 (en) * | 2003-08-20 | 2007-01-16 | Formax, Inc. | Molding apparatus for forming food patties having top and bottom surface contours |
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