Patent Abstract:
The present invention is a compact fruit-vine harvester and separation system in which the harvested fruit travels along a vertical plane inside the harvester during processing, followed by a single turn for output. The system includes a machine and related methods for harvesting vine-borne crops. The machine provides for vine borne crops to be severed, separated, cleaned and machine-sorted along a straight path before making a single turn prior to exit. The machine incorporates a blower and/or suction system for efficient removal of unwanted dirt, vegetation and debris, and an optional roller to prevent clogging of the suction system.

Full Description:
This is a continuation-in-part of application Ser. No. 10/942,078 filed on Sep. 14, 2004, now U.S. Pat. No. 7,581,375, which is incorporated herein in its entirety by this reference 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to machines and methods for harvesting food crops, and more particularly, to improved small-scale machines and related methods for separating larger volumes of vine-borne crops from their vines while effectively removing unwanted dirt, vegetation and debris, minimizing damage to the fruit itself, and promoting better sorting of fruit. 
     2. Description of the Prior Art 
     Vine-borne crops have traditionally been harvested and processed by hand. However, such manual harvesting and processing was often tedious, time-consuming and expensive. Various machines, such as the one disclosed in U.S. Pat. No. 6,033,305, have been developed over the years to automate part, or all, of this process. These machines are able to harvest vine-borne crops from the ground at much faster speeds than humans. However, these machines were often inefficient in other aspects of the harvesting process. Early harvesting machines severed entire plants and dropped them upon the ground, with the desired crops remaining affixed to the plants. Then, collection devices would retrieve the mixture of vegetation, dirt and debris for processing. Human sorters would then be required to sort through the mixture to separate the crops from the rest, and extract the former. The human sorters had to quickly process these mixtures to prevent a backlog. As a result, some suitable crops were lost because they were too far entangled within the plants, or simply overlooked by the human sorters. 
     Various devices have been developed over the years to improve the mechanized harvesting process, and to minimize the need for human sorters. For example, U.S. Pat. Nos. 4,257,218, 4,335,570, and 6,257,978 all disclose harvesting machines utilizing at least one form of agitating device (such as vibrating shaker heads or conveyor belts) to dislodge tomatoes from the vines. Several harvesting machines, such as those disclosed in U.S. Pat. Nos. 6,257,978 and 6,033,305, also utilize forced air pressure systems to further remove dirt and debris. 
     Unfortunately, larger is not always better. While wider and larger machines are generally capable of harvesting and processing a higher volume of vine-borne crops, many road and/or field situations make it impossible or impractical to use or bring these large machines in to perform the desired harvesting. Such machines are also more difficult to maneuver. Such limited maneuverability may require the machine operator to spend additional time repositioning the machines to process each row of crops, or cause the machines to inadvertently trample one or more rows. In addition, larger machines tend to weigh more, and the added weight not only affects maneuverability (e.g. turning), it also makes the larger, heavier machines unusable in moist or muddy fields where they tend to bog down. It is therefore desirable to provide a smaller scale machine that is capable of harvesting larger volumes of vine-borne crops. 
     In addition, the design of many existing large and small-scale machines may cause damage to the fruit by imparting numerous drops and/or turns during processing. Many machines require the fruit to drop a distance of several feet over the course of processing through the machine, and to make several turns during the process. Each drop and each turn provides another point where the fruit may be damaged, so it is desirable to minimize the number and/distance that the fruit drops through the machine, and to minimize the number of turns the fruit makes as it travels through the machine. 
     Effective separating and sorting of harvested fruit is also important. More efficient removal of dirt, vegetation, trash and debris as well as more accurate sorting of fruit is possible when the harvested materials are uniformly dispersed, and not bunched together. An unfortunate side effect of machines in which the fruit makes multiple turns is that the fruit and associated trash and debris tends to bunch together. Rather than the fruits being evenly spaced upon the conveyors (so that they may be easily examined and processed), these corners cause the fruits to become crowded as they are transported onto an intersecting conveyor potentially forming windrows, making them more difficult to inspect and sort. This bunching makes removal of the trash and debris more difficult, and once removed, the bunching of the harvested fruit makes sorting more difficult as well. Furthermore, each turn involves a drop from one conveyor to another, risking additional damage to the fruit, and requiring more maintenance and cleanup from breakage. Transverse turns also tend to increase the overall width and size of the harvester machine. All of these consequences make it even more desirable to minimize the number of turns the fruit makes as it travels through the machine. 
     Blowers for cleaning trash and debris out of the fruit stream have been used in existing machines. Air from the blower is typically directed between two conveyors into the fruit stream as the fruit makes a ninety degree turn at the rear of the machine. The trash and debris is blown far enough to clear the receiving conveyor and drop off to the ground. It is therefore desirable to provide a machine with a blower unit that does not require the fruit to be subjected to the problems associated with unnecessary turns. 
     Suction units have also been used in existing harvesting machines for pulling the trash off the fruit stream on each side of the harvester, with the fan positioned in the typical application directly above a pickup point as fruit moves from one conveyor to another. This is not feasible for use on a small scale machine because of vertical space limitations of fitting a sufficiently large enough fan without lengthening the machine further or raising the height and creating shipping problems. The additional single conveyor width compounds the problem. It is therefore desirable to provide an effective suction system that may be used in a small scale machine. 
     It is therefore desirable to provide a small-scale vine-borne crop harvesting machine capable of processing a large volume of crops that is usable in a wide variety of field situations where larger machines cannot be used. It is further desirable that the harvesting machine effectively process vine-borne crops with minimum potential damage to the fruit. It is further desirable that the machine provide a minimum number of drops and turns so that the fruit is less susceptible to damage, so that trash and debris may be more effectively removed, and so that the fruit itself may be more efficiently sorted. 
     SUMMARY OF THE INVENTION 
     The present invention provides compact fruit-vine harvesters and separation systems in which the harvested fruit travels along a vertical plane or path during processing inside the machine, and makes only one ninety-degree turn following such processing in order to exit. The systems include machines and related methods for harvesting vine-borne crops. One embodiment of the machine is relatively compact, having a frame that is dimensioned such that its width is substantially the same as the wheel or track base so that it may travel on narrow roads, and be used in narrow field conditions. The machines provide for vine borne crops to be severed, separated, cleaned and machine-sorted along a single substantially vertical plane or straight (unturning) path inside the machine before making a single turn just prior to exit. Harvested fruit passing through the machines have fewer drops than seen in existing machines (typically two fewer drops). The machines incorporate a blower system, or a suction system, or a combination of blower and suction system for efficient removal of unwanted dirt, vegetation and debris. 
     In one embodiment, a severing device is provided at the forward end of a machine for severing fruit-laden vines from the ground. A first conveyor is provided that brings the severed fruit-laden vines to an upper position in the machine. It is preferred that this pre-processing (severing and depositing into the machine) be accomplished along the same vertical plane as the remaining processing inside the machine. However, multiple severing devices and/or multiple conveyors may be used to remove and deposit the vines into the machine that may not necessarily be oriented along the same vertical plane. In several embodiments, the severed fruit-laden vines cross an adjustable gap and are delivered onto a second conveyor, the gap allowing loose dirt and debris to fall through the machine to a dirt cross conveyor. In several embodiments, the material on this conveyor is passed through a vision system which ejects the red fruit back into the machine as the dirt and debris pass through to the ground. The fruit-laden vines are introduced into a rotating shaker having tines that engage and loosen the vines, causing the fruit to be dislodged as it shakes. The dislodged fruit drops onto a second conveyor below the shaker, and the vines are deposited onto a third conveyor. While traveling along the third conveyor, which is provided with large slots or as a wider pitch belted chain so that fruit can pass through, additional agitation may be imparted to the vines to dislodge any remaining fruit which falls through and is returned to the second conveyor. All of the conveyors are set up relatively close to each other so as to minimize the dropping distance of the fruit. These conveyors are all lined up substantially along the same vertical plane, so that the fruit and related materials are not turned and remain uniformly dispersed across the width of the conveyors. 
     Some dirt, debris, and vegetation may be deposited on the second conveyor along with the dislodged fruit. To remove this remaining trash, in several embodiments the second conveyor delivers the fruit and trash across an adjustable gap in which a strong upward air flow is provided through a nozzle attached to a blower below. The nozzle extends along the width of the second conveyor so that all fruit and trash is affected thereby. The airflow may be adjusted so that it is strong enough to blow away substantially all loose dirt, debris and vegetation without blowing away the fruit itself. The airflow also tends to remove trash and vegetation that may have become adhered to the second conveyor because of moisture or the like. 
     In some embodiments, an intake opening for a variable speed suction unit may be provided above the gap and blower nozzle to receive and remove all of the trash that is blown free by the lower nozzle. In other embodiments, one or more suction units are provided without any blower, preferably located along one or both sides of the fruit path, with special ducting to focus the suction over the fruit traveling through the machine along the vertical plane. 
     In some embodiments of the dual system using both blower and suction, one or more flaps are pivotally provided in the ducting for the blower system. Such flaps are activated when it is sensed that airflow has been affected by a large piece of vine engaged (clogged) in the suction system. When this condition is sensed, as, for example, a change in static pressure, a flap on the blower nozzle is moved so as to redirect the air flow forward in the machine and partially deadhead the blower, cutting off the airflow until the clog is cleared. This prevents trash that should be sucked up by the clogged suction unit from being blown all over the cleaned fruit on the conveyor. Once the clog is cleared, the normal condition is again sensed, and the flaps are returned to their original position(s) for normal operation. 
     In several embodiments, one or more continuously rotating rollers may be provided adjacent to the upper intake opening to dislodge any large pieces of vegetation or trash to prevent the upper opening from becoming clogged. Each roller itself is preferably smooth so that it does not become entangled with the vegetation or trash, but it may be provided with teeth, lagging, textured covering or tines to engage such materials if so desired. Each roller may rotate in either direction, so long as it tends to keep the vegetation and trash from clogging the intake opening of the upper suction unit. 
     The cleaned fruit that passes through the blower/suction gap is then deposited onto a fourth conveyor that is also in line with the three previous conveyors. The fourth conveyor takes the fruit to an automatic sorting unit which kicks out unwanted fruit according to its programmed instructions. Since the fruit has not traveled through any turns up to this point, it remains evenly separated on the fourth conveyor thereby improving the sorting process. Then, finally, the fruit makes its one and only turn where it is deposited onto a transversally oriented conveyor. Here, hand sorting may be performed, followed by deposit of the fruit onto a final conveyor which takes it up and out of the machine, usually for deposit into a waiting hopper alongside the machine. In an alternative embodiment, the transversally oriented conveyor and the final conveyor are one and the same, making the fruit available for sorting and then elevating it out of the machine to the hopper waiting alongside. 
     It is therefore a primary object of the present invention to provide a machine for harvesting vine-borne crops in which the harvested fruit travels along a substantially straight path within the machine as the fruit is separated from the vines, cleaned and sorted, prior to making a single turn followed by exit. 
     It is also an important object of the invention to provide a machine for harvesting vine-borne crops in which the harvested fruit travels a minimal distance from the uppermost to the lowermost point during processing, reducing the overall distance the fruit drops through the machine in order to reduce the potential for damage to the fruit. 
     It is also an important object of the invention to provide a machine for harvesting vine-borne crops in which the harvested fruit is uniformly dispersed as it is conveyed through the machine to facilitate better removal of unwanted trash and debris, and to facilitate better sorting of fruit. 
     It is also an important object of the invention to provide a machine for harvesting vine-borne crops in which unwanted dirt, vegetation and debris is removed through the action of an adjustable blower device provided along the path of travel through the machine. 
     It is also an important object of the invention to provide a machine for harvesting vine-borne crops in which unwanted dirt, vegetation and debris is removed through the action of adjustable suction device(s) provided along the path of travel through the machine. 
     It is also an important object of the invention to provide a machine for harvesting vine-borne crops in which unwanted dirt, vegetation and debris is removed through the dual action of an adjustable lower blower device and an adjustable upper suction device that are provided adjacent to each other along the path of travel through the machine. 
     It is also an important object of the invention to provide a small-scale machine for harvesting large volumes of vine-borne crops that may be deployed in vineyards and fields where larger machines cannot be efficiently used. 
     It is also an important object of the invention to provide improved methods for harvesting and processing vine-borne crops. 
     Additional objects of the invention will be apparent from the detailed descriptions and the claims herein. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a top view of an embodiment of the present invention. 
         FIG. 2  is a side view of an embodiment of the present invention along line  2 - 2  of  FIG. 1 . 
         FIG. 3  is a rear view of an embodiment of the present invention along line  3 - 3  of  FIG. 1 . 
         FIG. 4  is a cut away side view along line  4 - 4  of  FIG. 1  illustrating major operative elements of flow paths through the invention. 
         FIG. 5  is a detailed cut away side view along line  5 - 5  of  FIG. 1  of an exemplary air blower and air suction device of an embodiment of the present invention. 
         FIG. 6  is a side view along line  6 - 6  of  FIG. 1  of an exemplary mechanical fruit sorter of an embodiment of the present invention. 
         FIG. 7  is a top view of a suction device of an embodiment of the present invention along line  7 - 7  of  FIG. 2 . 
         FIG. 8  is a side view along line  8 - 8  of  FIG. 16  of another embodiment of the present invention illustrating a blower for cleaning harvested crop. 
         FIG. 9  is a top view of the embodiment of  FIG. 16  showing the cleaning elements. 
         FIG. 10  is a side view along line  10 - 10  of  FIG. 17  of another embodiment of the present invention illustrating overhead suction for cleaning harvested crop. 
         FIG. 11  is an end view along line  11 - 11  of the embodiment of  FIG. 16 . 
         FIG. 12  is a rear view along line  12 - 12  of  FIG. 18  of another embodiment of the present invention illustrating dual suction fans for use in cleaning harvested crop. 
         FIG. 13  is a top view of the embodiment of  FIG. 18  showing cleaning elements 
         FIG. 14  is a side view of an alternative embodiment of the present invention showing the blower and suction fan system operating under normal conditions. 
         FIG. 15  is a side view of the embodiment of  FIG. 14  showing the blower and suction fan under a plugged/clogged state with the blower flap directing air forward in the machine. 
         FIG. 16  is a top view of an alternate embodiment of the present invention having a blower only. 
         FIG. 17  is a top view of an alternate embodiment of the present invention having a suction fan only. 
         FIG. 18  is a top view of an alternate embodiment of the present invention having dual suction fans. 
     
    
    
     DETAILED DESCRIPTION 
     Referring to the drawings wherein like reference numerals designate like or corresponding parts throughout the several views, and referring particularly to  FIGS. 1 and 2 , it is seen that the illustrated exemplary embodiment of the invention is an apparatus and method for harvesting above-ground food plants grown in rows upon elongated planting ridges. The exterior components of the illustrated apparatus generally comprise a self-propelled vehicle body  10  having a driving compartment  11 , an adjustable arm  12  with a pickup device  14  and conveyor  15 , separator  20 , optional sorting platform  16 , and a discharging conveyor  17 . 
     As indicated in  FIG. 2 , an adjustable arm  12  may be affixed to the front end of the vehicle body  10 . The adjustable arm  12  may be any number of commercially available devices that allow the operator to adjust the position of the arm  12  relative to the ground, said position depending upon the characteristics of the particular crop harvested or its environment. A gage wheel  13  for height adjustment may be mounted at the front end of the adjustable arm  12 . The pickup device  14  may be any commercially available device capable of severing tomato vines V at or near ground level, such as a cutting disc or plurality of opposing blades, and a lift for placing the severed vines onto conveyor  15 . The pickup conveyor  15  may be an endless longitudinal conveyor belt traveling in a rearward direction into the separator  20 . Sorting platform  16  may be affixed to the rear end of the vehicle body  10 . Platform  16  allows one or more humans to examine and hand sort the tomatoes T on conveyor  26  before they are passed along to a discharging conveyor such as  17 . Conveyor  17  is depicted in the rear view of  FIG. 3  in its retracted position, with phantom lines showing its extended position over a receiving hopper  70  in an adjacent row. 
       FIG. 4  depicts the internal operation of one embodiment of the separator  20  of the present invention viewed from the right side. In this embodiment, an endless motor-driven longitudinal receiving conveyor  19  is adapted to receive the tomato vines V from the exterior pickup conveyor  15  and travel toward the rear end of the vehicle body  10 . An adjustable gap  18  is provided between the pickup conveyor  15  and receiving conveyor  19 , said gap  18  allowing loose tomatoes T, dirt clods and other debris to drop from the vines V while said vines travel between the two conveyors  15  and  19 . It is to be appreciated that the width of gap  18  may be varied to account for different sizes of vines V, tomatoes T, dirt clods and debris. For example, gap  18  may be set at a sufficiently small size that only the smaller dirt clods and debris fall through, or at a sufficiently large size that larger objects including small loose tomatoes T may also fall through. 
     In some embodiments, an endless transversely oriented motor-driven debris conveyor  21 , having one end underneath gap  18  and the opposite end extending outside the vehicle body  10 , may be positioned to receive the loose tomatoes T, dirt clods and debris falling through gap  18 . A commercially available sorting mechanism  27  may be mounted in close proximity to the debris conveyor  21  to recognize loose tomatoes T thereon, and place them onto the endless motor-driven collection conveyor  29  mounted under conveyor  21 . The remaining dirt clods and debris fall off conveyor  21  and outside the vehicle body  10 . Tomatoes T are collected on  29  and conveyed back up on to the machine and deposited onto an endless motor-driven longitudinal first processing conveyor  22 . Alternatively, if gap  18  is set at a sufficient size to allow only dirt clods and debris to fall through, the debris conveyor  21  may transport all objects falling through the gap  18  to the outside of the vehicle body  10 . 
     A shaker brush  30  is positioned for receiving tomatoes and vines from processing conveyor  19 . Said shaker brush  30  may be any commercially available brush comprising a plurality of tines  31  and an agitating mechanism (not depicted) for concurrently rotating and vibrating the shaker brush  30 , such as an eccentric weight assembly or vibrating motor. It is rotatable along a central axis in a downward direction, causing the vines V to be pulled underneath the shaker brush  30  toward the rear end of the vehicle body  10 . The vibratory force of the shaker brush  30  is sufficient to dislodge tomatoes T from their vines V, along with most remaining dirt clods and debris, without excessively damaging the tomatoes T. The dislodged tomatoes T, dirt clods and debris are dropped onto the first processing conveyor  22 , while the vines V are deposited upon the recovery conveyor  23 . 
     Processing conveyors  22  and  29  (described below) are made up of segments which provide a plurality of openings or slots that are of sufficient size to support tomatoes T, but allow small pieces of dirt, vegetation and debris to fall through. Larger pieces are removed by blower  40  and suction device  60  described below. 
     The illustrated exemplary recovery conveyor  23  is an endless motor-driven longitudinal conveyor traveling toward the rear end of vehicle body  10 . Conveyor  23  is made up of segments which provide a plurality of openings or slots that are of sufficient size to allow tomatoes to fall through. An agitating mechanism (not depicted) may be provided in communication with the recovery conveyor  23 . Said agitating mechanism may be any commercially available device for agitating the tomatoes and vines on the recovery conveyor  23 . The agitator should be capable of providing loosening vibratory motions to further separate the tomatoes T that remain entangled but not connected with the vines V at this stage. A recovery shelf track  24  is positioned underneath the return segment of the recovery conveyor  23  to capture the tomatoes T falling through the slots of the recovery conveyor  23 , and, in conjunction with the return movement of the recovery conveyor  23 , transport the tomatoes T to the first processing conveyor  22 . 
     The illustrated exemplary second processing conveyor  25  is an endless motor-driven longitudinal conveyor belt traveling toward the rear end of vehicle body  10 . Conveyor  25  is positioned near the rear end of first processing conveyor  22 . There is an adjustable gap  28  between the first processing conveyor  22  and the second processing conveyor  25 . In some embodiments, an air blower  40  is mounted below the front end of the second processing conveyor  25 , with the nozzle  43  directed toward the gap  28  between the two conveyors, so that the forced air pressure emitted from the nozzle  43  contacts the tomatoes T, vegetation, dirt and debris falling from the first processing conveyor  22  onto the second processing conveyor  25 . Such forced air pressure may be varied so that it is of sufficient strength to separate vegetation, dirt and debris from the tomatoes T, and force said materials upward and towards the rear without blowing the tomatoes themselves away. In some embodiments, nozzle  43  may be provided with a narrow slit opening  42  to focus the flow of air as shown in  FIG. 9 . Optional roller(s)  45  may be used to help with the separation of blowing materials by rotating counterclockwise and direct the said materials towards the collection conveyor  72 . The vegetation, dirt, and debris may be collected on a transverse conveyor  72  mounted behind roller(s)  45  and directly above conveyor  25 . The collected dirt and debris are directed off the side of the machine falling to the ground. 
     In some embodiments, an air suction device  60 , such as a fan or vacuum, is positioned above the gap  28 , as shown in  FIG. 10 . The size and shape of the vacuum opening  63  may be varied, as discussed below, to assure that equal air suction (vacuum) is provided across the entire path (width) of conveyor  22  and gap  28 . The vacuum imparted by this suction device  60  may be varied so that it is of sufficient strength to capture the dirt, vegetation and debris. 
     In one embodiment, the suction fan  60  is positioned vertically on the side, with ducting to connect the pickup nozzle area to the inlet of the fan. (See  FIG. 7 .) The additional width of the conveyor is an additional challenge for the fan. To overcome this, a larger unit drawing even more power may be used. In alternative embodiments, dual fans  60  may be provided, one on each side of the fruit path, with ducting allowing the entire fruit path to be subject to suction, as shown in  FIGS. 12 ,  13  and  18 . 
       FIG. 5  provides a detailed side view of an embodiment using both the air blower  40  and air suction device  60  of the present invention. As shown therein, the nozzle  43  of the air blower  40  is positioned in close proximity to and across the width of gap  28  between the first processing conveyor  22  and second processing conveyer  25 , so that the forced air pressure emitted through nozzle  43  contacts the tomatoes T, dirt clods and debris falling from the first conveyor  22  to the second  25 . The suction device  60  is positioned above the gap  28  with its opening  63  directly across from the nozzle  43 , so that the forced air pressure emitted from the nozzle  43  (and the dirt, vegetation and debris carried by such pressure) is directly received by the opening  63  of the suction device  60 . The volume of air provided by the blower and/or suction should generally be adjusted as high as possible without being so strong as to remove the tomatoes themselves. 
     Blower  40  also provides the additional function of dislodging vegetation or debris that may have become adhered to conveyor  22  through moisture or the like, thereby improving the efficiency and operational functionality of conveyor  22 . It is to be appreciated that in other embodiments, blower  40  may be provided without suction  60  (see  FIGS. 8 ,  9 ,  11  and  16 ), and in other embodiments suction  60  may be provided without blower  40  (see  FIGS. 10 and 17 ). 
     In some embodiments, at least one roller  45  is provided. Roller(s)  45  may be provided adjacent to and below the opening  63  of suction device  60  ( FIG. 5 ), or above the nozzle  43  of the blower device ( FIG. 9 ), and extending across the width of opening  63  or nozzle  43 . Roller(s)  45  may have a smooth surface, or may be provided with teeth, lagging or tines of appropriate length to engage the vegetation and other dislodged debris. In the suction embodiments of the present invention, roller(s)  45  rotate while the suction device  60  is operating so as to make contact with and dislodge any excessive vegetation or other debris in order to prevent opening  63  from being clogged. As shown in  FIG. 5 , roller(s)  45  may be rotated in a clockwise direction so as to continuously be causing vegetation and debris to be pushed out and away from opening  63 . However, this may cause such vegetation and debris to be deposited with the relatively clean tomatoes T on conveyor  25 . Thus, in many circumstances, it may be more beneficial for one or more of rollers  45  to rotate counter-clockwise so as to force the vegetation and debris into opening  63  so that it may be carried away. Among other things, the size and moisture content of the vegetation and debris may dictate whether roller(s)  45  operate in a clockwise or counter-clockwise direction, or some rollers in one direction and others in the opposite direction. 
       FIGS. 8 and 9  illustrate an embodiment of a blower used on the small scale machine. On the side view of  FIG. 8 , a blower outlet  43  is positioned to direct air upward through the gap  28  between two conveyors  22  and  25 . The air goes through the fruit stream, lifting the lighter trash upward into the air chamber and over optional roller(s)  45 . In this embodiment, roller(s)  45  help deliver debris onto a cross conveyor  72  where it may be transferred into an optional removal chute  75 . On the backside of the roller  45 , the air is allowed to vent out one side in a larger cavity with a conveyor underneath. Part of the trash in the air settles out and is conveyed to the side of the machine with the conveyor  72 . The lighter trash will likely stay airborne and vent out with the air to the side. In some embodiments, the air may be vented off both sides, with the conveyor split to run both directions. In another embodiment, air may also be allowed to vent towards the rear of the machine through a screen. In this embodiment, when the system stops at the end of the field, the air-stream would stop, and the loose trash collected on this screen would fall down to the conveyor. 
     In some embodiments, accommodation for trash collection and directing material to the ground with a flexible chute  75  (see  FIG. 11 ) made with flaps may be needed to prevent light trash from collecting in the wrong places and causing engine or hydraulic overheating. The trash conveyor  72  is preferably a flat belt, not a belted chain. On  FIG. 8 , the sides of the air chamber are enclosed to direct the trash over roller  45  to the collection conveyor. The underside of the recovery shelf track  24  serves as the top of the air chamber. 
     A side view of a suction device  60  is shown in  FIG. 5 , and a top view is shown in  FIG. 7 . In this illustrated embodiment, suction device  60  includes a variable speed fan or blower unit  61  attached to a channel  62  that is attached, in turn, to a duct  64  leading to opening  63 . An exhaust duct  65  may also be provided. Because of the change in direction of airflow through channel  62  and duct  64 , the size and shape of opening  63  may be varied so as to provide a uniform level of suction across the entire path of conveyor  25  and gap  28 . By way of example and without limitation, opening  63  may not be provided in a rectangular form, but the left side of opening  63  may be narrower than the right side so as to assure level airflow across its length. 
     In an alternative to the embodiments using both suction  60  and blower  40 , one or more flaps  76  may be provided on the blower outlet nozzle  43  which may be opened or closed to respond to clogging of the suction system by a large clump of vine mass. See  FIGS. 14 and 15 . Such a clog causes the suction  60  to lose some of its airflow, and when used with blower  40 , may result in undesirable redirecting of blower air flow blowing trash where it is not wanted. The flap  76  is attached to one or more electronically controlled solenoids or other switches  77 , and a sensor  78  such as a static air pressure sensor is provided adjacent to the suction unit. If the sensor  78  detects a change in air pressure brought about by a clog caused by a large vine mass ( FIG. 15 ), the switches  77  are activated closing the flap  76  so as to redirect the air from the suction system forward in the machine into conveyor  22 , until the clog has cleared. See upward arrow of  FIG. 15 . The clearing of the clog is sensed by the pressure returning to normal, at which point the switches  77  are deactivated returning the flaps to their normal operating positions, as shown in  FIG. 14 . 
       FIGS. 12 ,  13  and  18  illustrate an alternative embodiment using a dual suction fan arrangement. The top view of  FIG. 13  shows ducting to both sides of the machine with no dividing partition inside the ductwork. Air is allowed to flow freely through with no catch point for trash to hook on. A very large volume of air can be moved with this embodiment without needing the additional space required for a single overly sized unit. The horsepower required to drive this embodiment is significant, but all the trash collected may be controlled. 
     It is to be appreciated that all of conveyors  15 ,  19 ,  22 ,  23  and  25  are provided along the same vertical plane, and are operatively positioned, as described herein, above and/or below each other in this plane. In this way, the tomatoes T removed from the vines travel along a straight path, moving from, the front toward the rear of the machine, being directed by the conveyors and by gravity. This configuration avoids any left or right turns in the path that the tomatoes T travel through the machine, resulting in better distribution of the tomatoes across conveyor  25  when they reach the sorting stage. Left and right turns in the paths of other machine cause the tomatoes to roll together into windrows that are more difficult to separate and sort. 
     In some embodiments, an endless motor-driven transversely oriented output conveyor  26  may be positioned near the rear end of the second processing conveyor  25 . A gap is provided between the second processing conveyor  25  and the output conveyor  26 . An optical/mechanical fruit sorter  50  is mounted in close proximity to this gap. The optical/mechanical fruit sorter  50  may be any commercially device capable of selecting or rejecting tomatoes T based upon certain predetermined criteria, such as color. It should also comprise a means of sorting tomatoes T based upon their satisfaction of the predetermined criteria, such as a mechanical arm or pivoting gates. It is to be understood that the mechanical fruit sorter  50  may be replaced by, or supplemented with, human sorters who can manually examine the tomatoes on conveyor  26  as they stand on platform  16 . 
     Regardless of the particular examination method utilized, tomatoes T satisfying the predetermined criteria are transported to output conveyor  26 , while rejected tomatoes are removed therefrom, either by the mechanical sorter  50  or human sorters. The output conveyor  26  is in communication with the discharging conveyor  17 , which transports the satisfactory tomatoes from the present invention onto any number of commercially available hoppers, such as a trailer or truck bed  70 . 
       FIG. 6  depicts an embodiment utilizing a mechanical fruit sorter  50  located along the same vertical plane. It is seen that the mechanical fruit sorter  50  comprises a sensor  51  and pivoting gate  52 . The sensor  51  may be any commercially available device capable of determining whether the tomato T satisfies the predetermined criteria inputted by the operator. Tomatoes T satisfying such criteria are permitted to fall toward output conveyor  26 . As to tomatoes T 1  failing such criteria, the fruit sorter  50  causes the gate  52  to pivot outward, causing the failing tomatoes T 1  to miss the output conveyor  26  and fall outside the vehicle body  10 . 
     The use of a particular embodiment of the present invention will now be described without limiting the claims herein. In this exemplary embodiment, the operator inputs a series of predetermined criteria into the mechanical fruit sorter  50 , which defines the parameters for the ‘acceptable’ tomatoes harvested. The size of gap  18  is selected and set. The initial airflow for blower  40  and/or suction  60  is also selected (depending upon whether one or both is provided), although these may be changed during processing to provide appropriate removal of debris. The exemplary invention is then positioned before a row of tomato vines V. The adjustable arm  12  is placed in such a manner that the cutting device  14  will sever the tomato vines V at or near ground level. As the present invention proceeds along the row of tomato vines V, cutting device  14  severs the tomato vines V. The pickup mechanism receives the severed tomato vines V (along with loose tomatoes T, dirt clods and debris), and places them onto the pickup conveyor  15 . The pickup conveyor  15  then transports the vines V rearward into separator  20 . 
     The tomato vines V are transported over the gap  18  between the pickup conveyor  15  and receiving conveyor  19 . As they cross the gap, loose tomatoes T, dirt clods and debris smaller than the width of the gap fall through, and onto the debris conveyor  21 . The debris conveyor  21  passes the mixture through a sorting mechanism. Tomatoes T within the mixture are diverted to the collection conveyor  29 , then dropped onto the first processing conveyor  22 , while the dirt clods and debris passing through the sorting mechanism are discarded outside the vehicle body  10 . 
     The tomato vines V upon the receiving conveyor  19  travel along a vertical plane and contact the shaker brush  30 . As the downward rotation of the shaker brush  30  pulls the tomato vines V underneath the brush, the vibration of the brush tines  31  dislodges the tomatoes T from the vines V, along with the remaining dirt clods and debris. The dislodged tomatoes T, dirt clods and debris fall onto the first processing conveyor  22 , while the vines V (along with any tomatoes T still lodged therein) are deposited by the shaker brush  30  upon the recovery conveyor  23 . 
     As the recovery conveyor  23  transports the vines V along the vertical plane toward the rear of the vehicle body  10 , it is vibrated by an agitating mechanism. The vibrating motion of said mechanism is sufficient to dislodge the remaining tomatoes T from the vines V. These tomatoes T fall through the slots of the recovery conveyor  23  onto the recovery shelf track  24 . The vines continue rearward until they are ejected from the rear end of the vehicle body  10 . The return direction of the recovery conveyor  23  receives the tomatoes T and deposits them upon the first processing conveyor  22 , along with the tomatoes T dislodged by the shaker brush  30 . 
     The first processing conveyor  22  continues to transport the tomatoes T (and remaining dirt clods and debris) toward the rear end of the vehicle body  10  along the vertical plane. When the mixture reaches the rear end of the first processing conveyor  22 , it falls to the second processing conveyor  25  along the plane. During the fall, the mixture is struck by air pressure from the air blower  40  (if provided) mounted underneath the second processing conveyor  25 . The air should be of sufficient volume to cause the tomatoes to “dance,” that is, to be moved slightly so that the debris and vegetation around them is removed, while the tomatoes themselves are not. Such air pressure causes the dirt and debris to separate from the tomatoes T and fly upward, where they are captured by suction pressure from the air suction device  60  (if provided). The suction device  60  ejects the dirt clods and debris from the rear end of the vehicle body  10 , while the tomatoes T continue along the second processing conveyor  25 . 
     As the tomatoes T reach the rear end of the second processing conveyor  25 , they are analyzed by a mechanical fruit sorter  50  along the vertical plane. Tomatoes T satisfying the particular criteria previously inputted by the operator are transported onto output conveyor  26 , while unacceptable tomatoes are discarded out the bottom of the vehicle body  10 . The output conveyor  26  transports the acceptable tomatoes T past manual sorters standing on platform  16 , and then to the discharging conveyor  17 , where the tomatoes T are placed into transport hoppers  70 . 
     It is to be understood that variations and modifications of the present invention may be made without departing from the scope thereof, including different combinations of the various elements identified herein regardless of whether such combinations have been specifically described or illustrated. It is also to be understood that the present invention is not to be limited by the specific embodiments disclosed herein, but only in accordance with the appended claims when read in light of the foregoing specification.

Technology Classification (CPC): 0