Abstract:
A method of processing and distributing perishable food products, including the steps of processing the primals and storing in a central location until ordered, a method of containerization of meat products including compression and storage, a method of processing meat products including chilling and monitoring demand, for the meat, a method of processing food products including modifying the atmosphere in the container and altering pressure as necessary, a method of loading containers into a vehicle comprising separate conveying means for loading and unloading, and a conveyor sorting apparatus having an endless belt and an article contacting surface moving substantially perpendicular to the primary conveyor.

Description:
FIELD OF THE INVENTION 
       [0001]    This invention relates to processing and distribution of perishable or contaminable food products. The invention has particular relevance to meat processing. 
         [0002]    Throughout this specification it is to be understood that references to “meat” include all forms of meat of all descriptions generally considered to be edible, for example including without limitation fish, beef, pork, lamb, poultry and offal. 
       BACKGROUND 
       [0003]    Processed food perishables which are ready for retail cabinet display, particularly processed meat products, are commonly referred to in the field as “cabinet ready”. Currently, cabinet ready meat products are usually prepared at the retail outlet where they are sold. This can be inefficient, and it is desirable to provide a centralised system whereby processing occurs centrally to supply remote retail outlets with cabinet ready meat products for retail sale. 
         [0004]    Centralised processing of perishable food products such as meat is problematic for a number of reasons. One is the consumer preference for freshness which can be extremely difficult to achieve when the retail ready product must be transported over large distances to a retail outlet. Another difficulty is the sheer logistics involved in providing a significant product range, which is usually a requirement for most retail outlets to meet their customers expectations, from one central facility. 
         [0005]    Further problems include handling difficulties and food safety. Also, aging is required for some meat types, and this can be a problem in a centralised system. 
       SUMMARY OF THE INVENTION 
       [0006]    It is an object of the present invention to provide improved methods or apparatus for the processing and/or distribution of perishable food products. 
         [0007]    An alternative or additional object of the present invention is to provide improved processing and/or distribution methods or apparatus for supplying remote retail outlets with cabinet ready products. 
         [0008]    Alternatively or additionally, it is an object of the present invention to ameliorate one or more of the disadvantages or problems associated with existing methods or apparatus, or to at least provide the public with a useful alternative to existing methods or apparatus. 
         [0009]    Accordingly in a first aspect the invention consists in 
         [0000]    a method of processing and distribution of a perishable food product for supplying remote retail outlets with cabinet ready products, the method including the steps of:
 
placing primal products in a sealable reusable container; removing the primals from the container and processing the primals into retail products;
 
storing the retail products in a central storage facility;
 
receiving a retail order;
 
selecting retail products in the central storage facility dependent on the retail order, and;
 
transporting the selected products in the container to a remote retail facility in cabinet ready form.
 
         [0010]    Preferably the primals comprise meat primals, and the retail products comprise retail meat products. 
         [0011]    Preferably the retail products are packaged prior to placement in the central storage facility. 
         [0012]    Preferably the primals are placed in a first container and the products selected from the central storage facility are placed in a second sealable reusable container for transport to the retail facility. 
         [0013]    Preferably the primals are stored in the first container for a first period of time for one or more of: cooling the primals; inventory purposes; aging the primals; production efficiency. 
         [0014]    Preferably the packaged products are stored in the central storage facility for a second period of time selected to improve the shelf life of the product. 
         [0015]    Preferably the first or second period of time is dependent upon the nature of the product. 
         [0016]    Preferably the method includes sealing the container and modifying the atmosphere within the container after placement of the meat within the container. 
         [0017]    Preferably the atmosphere within the container with the meat therein is a substantially anaerobic atmosphere. Preferably the atmosphere comprises CO 2  and one or more other gases excluding oxygen. 
         [0018]    Preferably the atmosphere within the container is modified to provide the desired atmosphere by a gassing process which includes drawing a vacuum in the container and introducing one or more gases to provide the desired atmosphere. 
         [0019]    Preferably the steps of the gassing process may be performed more than once in order to provide the desired atmosphere. 
         [0020]    Preferably the container is placed in a variable pressure chamber to perform the gassing process, the pressure within the variable pressure chamber being reduced or increased to dependent on the pressure within the container to thereby reduce stress on the container. 
         [0021]    Preferably the meat is placed under mechanical pressure within the first container. 
         [0022]    Preferably a cooling means is placed in the container to cool the meat. 
         [0023]    Preferably one or more shelves may be provided in the container to support the primals or the packaged products. 
         [0024]    Preferably the container is provided with an electronically readable identification tag. Preferably the tag is an RFID (Radio Frequency Identification) tag and an ID input is applied to the tag prior to the container being placed in storage. 
         [0025]    Preferably the first container is stored at a temperature which is close to the freezing temperature of the meat but which is not sufficiently low to cause the meat to freeze. 
         [0026]    Preferably the first time period is selected to age the meat. 
         [0027]    Preferably the storage location of the first container and an indication of the age of the meat (for example the time at which the container was placed in storage) is recorded. 
         [0028]    Preferably the container while in storage is subjected to an air flow impinging thereon at a velocity in the range of approximately 1 to 2 metres per second, at a temperature of approximately −2 to 3 degrees Celsius. 
         [0029]    Preferably the container is automatedly delivered to and/or retrieved from storage. 
         [0030]    Preferably the step of processing the meat involves delivering the first container to a production cell. Preferably the meat is removed from the first container without manual handling. 
         [0031]    Preferably the container is provided to a cleaning facility for reuse. Preferably the container is sterilized. 
         [0032]    Preferably the packaged products leave the production cell in a retail or cabinet ready state. 
         [0033]    Preferably the packaged products are delivered to the central storage facility in an unlabelled condition. 
         [0034]    Preferably the identity of the packaged products in the central storage facility is determined by means other than a label. 
         [0035]    Preferably the location of packaged products in the central storage facility is recorded. 
         [0036]    Preferably the location of the packaged products in the central storage facility is used to identify and/or track the packaged products. 
         [0037]    Preferably an indication of the time for which each packaged product has been in the central storage facility is recorded. 
         [0038]    Preferably packaged products for fulfilling a retail order are automatically selected based on at least some of the recorded information. 
         [0039]    In a second aspect the invention consists in apparatus for processing and distribution of a perishable food product for supplying remote retail outlets with cabinet ready products, the apparatus including:
       a sealable reusable container for storage of primal products;   processing means to process the primals into retail products;   a storage facility in which to store the retail products;   a control system to receive a retail order, select retail products in the central storage facility dependent on the retail order, and;   transport apparatus to transport the selected products in a sealable reusable container to a remote retail facility in cabinet ready form.       
 
         [0045]    In a third aspect the invention consists in a method of containerization of meat in a meat processing or distribution operation comprising the steps of 
         [0000]    providing a container having a base and at least one wall dependent therefrom,
 
providing a compression apparatus and a shelving apparatus,
 
receiving a meat primal,
 
selecting one of the compression apparatus or shelving apparatus dependent on the primal,
 
placing the meat cut in the container on the shelving apparatus or in the compression apparatus,
 
placing the selected apparatus in the container, and
 
closing the container.
 
         [0046]    Preferably the compression apparatus includes product cooling apparatus. 
         [0047]    In a fourth aspect the invention consists in apparatus for storage, treatment or distribution of meat comprising, 
         [0000]    a container having a base and at least one wall dependent therefrom, and
 
accessory apparatus adapted for disposal within the container, the accessory apparatus being selected from compression apparatus, shelving apparatus or product cooling apparatus or a combination thereof.
 
         [0048]    In a fifth aspect the invention consists in a method of processing meat, the method comprising the steps of 
         [0000]    placing one or more meat primals in a container,
 
storing the container in a chiller,
 
monitoring the length of time for which the meat has been stored in the chiller,
 
monitoring demand for the meat,
 
and introducing meat into the chiller based on the demand.
 
         [0049]    In a sixth aspect the invention consists in a method of modifying a gaseous atmosphere in a container carrying a food item, the method including the steps of: 
         [0000]    placing the container in a substantially fluid tight chamber;
 
adding or removing one or more gasses to or from the container to modify the atmosphere in the container, and;
 
altering the pressure within the chamber to substantially equalize the pressure within the container and the pressure within the chamber.
 
         [0050]    Preferably the pressure is equalized such that mechanical stresses on the container are substantially reduced. 
         [0051]    In a seventh aspect the invention consists in apparatus for modifying a gaseous atmosphere in a container carrying a food item, the apparatus comprising a chamber capable of receiving the container and having pressure adjustment means to allow adjustment of the pressure within the chamber, gas transfer means to add or remove one or more gasses to or from the container when it is within the chamber, and control means to adjust the pressure within the chamber to substantially equalize the pressure within the container and the pressure within the chamber when the one or more gasses is being added or removed to or from the container. 
         [0052]    Preferably the container includes a valve adapted to be actuated by the gas transfer means. 
         [0053]    In a eighth aspect the invention consists in a method of loading or unloading containers to or from a vehicle having a carrying tray, the method including the steps of: 
         [0000]    providing a conveying means arranged to provide a path beginning at a loading point at a first end of the tray and extending longitudinally to a second end of the tray traversing a part of the tray laterally and returning longitudinally to an unloading point at the first end of the tray,
 
unloading a container from the tray at the unloading point,
 
indexing the conveying means so that a further container on the conveying path is transported to the unloading point.
 
         [0054]    Preferably the step of indexing the conveyor provides space on the conveying path at the loading point so that a container may be loaded onto the conveying path. 
         [0055]    In a ninth aspect the invention consists in a vehicle carrying tray having container conveyor apparatus arranged to provide at least one path having: 
         [0000]    a first longitudinal section beginning at a container loading point at a first end of the tray and extending to a second end of the tray;
 
a second longitudinal section beginning at the second end of the tray and ending at a container unloading point at a first end of the tray, and;
 
a lateral section at or adjacent to the second end between the longitudinal sections; and control means to allow a container provided at the loading point to be controllably advanced along the first longitudinal section, across the lateral section, and along the second longitudinal section to the unloading point.
 
         [0056]    Preferably two paths are provided, the longitudinal sections of the paths being substantially parallel, the second longitudinal sections of each path being provided adjacent to each other in a central region of the tray, and the first longitudinal sections being provided on opposing peripheral regions of the tray. 
         [0057]    In a tenth aspect the invention consists in conveyor sorter apparatus for sorting articles present on a moving primary conveyor, the apparatus comprising an endless belt having at least one article contacting surface, the belt having a direction of travel which has an angle less than 90 degree relative to the direction of travel of the primary conveyor, and the article contacting surface being arranged so move in a direction substantially perpendicular to the direction of travel of the primary conveyor in use. 
         [0058]    Preferably the relative speed of the belt and the primary conveyor is such that the article contacting surface moves in the direction of travel of the primary conveyor at substantially the same speed as the primary conveyor, so that articles on the primary conveyor are pushed across the primary conveyor to be removed therefrom. 
         [0059]    Further aspects of the invention will become apparent from the following description. 
     
    
     
       DRAWING DESCRIPTION 
         [0060]    One or more embodiments of the invention will be described below by way of example with reference to the accompanying drawings, in which: 
           [0061]      FIG. 1  is a structure diagram illustrating a process flow; 
           [0062]      FIG. 1A  is a perspective view of a container; 
           [0063]      FIG. 1B  is a perspective view of a cooling and/or compression apparatus for use with the container of  FIG. 1A ; 
           [0064]      FIG. 1C  is a perspective view of a shelving apparatus for use with the container of  FIG. 1A ; 
           [0065]      FIG. 2  is a diagrammatic side elevation of gas exchange apparatus; 
           [0066]      FIG. 3  is a diagrammatic plan view of part of a processing facility; 
           [0067]      FIG. 4  is a diagrammatic plan view of a production cell; 
           [0068]      FIG. 5  is a diagrammatic plan view of accumulation apparatus; 
           [0069]      FIG. 6  is a diagrammatic side elevation of the apparatus of  FIG. 5 ; 
           [0070]      FIG. 7  is a diagrammatic plan view of a sorting and packing installation; 
           [0071]      FIG. 8  is a diagrammatic plan view of sorting apparatus; 
           [0072]      FIG. 9  is a diagrammatic side elevation of the apparatus of  FIG. 8 ; 
           [0073]      FIG. 10  is a diagrammatic plan view of a vehicle tray showing loading and unloading apparatus. 
       
    
    
     DETAILED DESCRIPTION 
       [0074]    Referring to  FIG. 1 , a schematic flow diagram of a centralized meat processing facility is shown. Although the production processes and associated facility will be described with reference to processing and distribution of meat products, it will be seen by those skilled in the art that the invention may be applicable to distribution and/or processing of a variety of other perishable food products including without limitation agricultural or horticultural produce (both edible or inedible), natural and semi-processed food products and organic products generally. The process also has general application to products in which a controlled atmosphere, or at least controlled temperature conditions, is desirable or necessary for ensuring product quality or longevity. 
         [0075]    The process shown in  FIG. 1  begins in step  1  in which one or more containers is provided for containing one or more meat processing ingredients such as meat primals. The term “primal” generally refers to a food item prior to retail processing. The term “meat primal” refers to meat post slaughter but prior to retail processing. Typically this will refer to meat which has been principally deboned, and could include muscle portions as well as large quantities of mince, for example. In step  2  the primals are placed in the containers. An example of an appropriate container is described in U.S. Pat. No. 5,670,195, the contents of which are incorporated herein by reference. As described in that document, the container may be sealed and provided with a desired atmosphere using a gas flushing process via a valve provided in a lid of the container. 
         [0076]    The present invention provides a number of improvements over the container and associated process disclosed in U.S. Pat. Nos. 5,670,195 and 6,194,012 (the contents of which are included herein by reference). 
         [0077]    An example of a preferred container is shown in  FIG. 1A . Referring to that Figure, the container  150  includes a base  152 , one or more side walls (in this example four side walls are shown)  154 , and a lid  156 . The container has standardized external dimensions which provide a means for handling so as to allow automated handling of the container. Thus an external rib  155  provides a collar which may be used by lifting and transport apparatus, such as the crane referred to above, to engage with the collar for handling the container. Since the external dimensions of the container are standardized, the handling apparatus may handle all the containers in the inventory. The wall(s) of the container may also include a taper  157  to allow one container to be stacked within another. The taper may also facilitate automated handling. 
         [0078]    A valve  158  is provided in the lid of each container. Once sealed, the atmosphere within each container may be modified or pressurized, for example by using the valve to evacuate the air within the container surrounding the ingredients and replace it with a desired gas (such as carbon dioxide in the preferred embodiment of the meat processing example) or a desired combination of gases. 
         [0079]    The lid may be affixed to the container by clips  160  which have a general “U” shape with one leg of the “U” engaging with the container rim and the other with the lid. The clips allow the lid to be maintained in sealing contact with the container to provide a fluid tight seal, thereby maintaining the desired atmosphere and/or pressurization within the container. The clips also facilitate a mechanical connection between the container body and the lid which assists with the overall structural integrity of the container. 
         [0080]    The container may be provided with accessories such as a thermal heatsink in the form of a thermally conductive member that is provided within the container. In a preferred form, the heatsink is provided as an elongate element having a central cavity which may be filled with a suitable substance such as ice. The elongated element may also be used to provide a central support for an upper platen and a lower platen which may be used to provide compression to the meat or other ingredient within the container. An example of a preferred construction is shown in  FIG. 1B . Compression and/or cooling apparatus  170  may be provided in the container. Thus, if the ingredient is deboned beef primals, then these may be placed between platens  172  and  174 . Mechanical compression is applied to the primals by placing downward pressure on platen  176  and engaging it with central stem  174  using the platen engagement mechanism  180 . The engagement mechanism  180  may include a biasing mechanism such as a spring to ensure that pressure is maintained on the primals. Alternatively, or in addition, the stem  174  can provide a cooling function. The stem includes a cavity which may be accessed through apertures  178  to allow a coolant such as water to be provided in the cavity and frozen to form ice. As the ice melts following placement of primals in the container about the stem, significant heat energy is drawn from the primals, melting the ice and lowering the temperature of the primals. 
         [0081]    Referring now to  FIG. 1C , a series of removable, height adjustable shelves  182  may be provided within the container for storing bone in cuts or other ingredients. The shelves are adjustably moveable relative to a central support  184  which has a lifting eye  186  to allow a loading or unloading mechanism to lower or lift the shelf unit into or out of the container. The shelves  186  include a contoured central aperture that allows each shelf to be selectively engageable with teeth on the support  184 . The shelves engage with the support  184  in one angular disposition, and may be disengaged by rotation (for example through approximately 45 degrees) upon which they may be moved along the support. 
         [0082]    Therefore, when ingredients are placed in containers, the user has a number of options for storage or treatment of the ingredients as part of the overall processing. The processing apparatus or components identified above allow the best storage conditions to be utilized for that particular ingredient so as to maximize the quality and/or condition of the perishable product. For example, if poultry primals are to be placed in the container, then these will typically be placed in the container, and the container will simply be lidded. If beef primals are supplied, then these will typically be maintained under mechanical pressure, and the internal cooling apparatus will be used to reduce their temperature. If the beef primals are not deboned, then they are placed on shelves to prevent the bones damaging the meat which would occur if compression was used. The container will typically be gassed with a gas mixture to reduce microbial growth, and pressurized. Bone-in beef primals will typically be placed on shelves within the container, and lidded, then gassed, and pressurized. Other ingredients may also be placed on shelves, and some may not require lidding of the container. 
         [0083]    Once the containers have been filled and lidded, the gas exchange process takes place. In a preferred embodiment, the atmosphere within the container is an anaerobic atmosphere. This may be achieved by flushing the container with one or more gases, such as carbon dioxide for example. Turning to  FIG. 2 , apparatus for effecting the gas flushing process is diagrammatically illustrated. The container  21  is placed in a substantially fluid tight enclosure  22 . A fluid communication device  23  may be engaged with the valve that is provided in the lid  24  of the container such that a vacuum may be drawn within the container from a vacuum source which may be connected to apparatus  23 , and a selected gas or mixture of gases may be introduced into the container through the apparatus  23 . The enclosure  22  has a fluid passageway  25  which may also be connected to a source of positive or negative pressure. Control means (not shown) use passageway  25  to adjust the pressure of the atmosphere within enclosure  22  to substantially match the pressure of the atmosphere within the container  21 . In this way, mechanical stresses exerted on the walls of the container by the changes in pressure that occurred during the gas flushing process are minimised. This allows containers to be manufactured using less material, making the overall process more economic. It also allows the life of containers to be extended. 
         [0084]    Before or after the gassing process has been completed, the container is provided with an identifier. In the preferred embodiment the identifier is provided by applying an RFID (Radio Frequency Indentification) tag to the container. However other methods may be used, for example applying a bar code or a label. This identifier may be used to identify the container, and thus its contents, as it progresses through the process. 
         [0085]    Returning to  FIG. 1 , the next step in the process is supplying the filled and gassed containers to a controlled atmosphere inventory, which will be referred to in this document as the primal chiller. This occurs in step  3 . 
         [0086]    The containers are transported to the primal chiller and may be stored within the chiller or the container for a selected (preferably a predetermined) period of time for one or more of: cooling the primals (or other ingredients); inventory purposes; aging the primals; production efficiency. 
         [0087]    Referring to  FIG. 3 , diagrammatic apparatus showing a layout of a centralised meat processing facility at which a meat processing method according to the invention may be performed is shown. The filled containers are preferably introduced into the chiller  31  by a conveyor system  32 . The chiller  31  has a plurality of racks or shelves  34  on which containers are placed. These are preferably arranged in rows, leaving aisles  36  in between the rows of shelves  34  in which an automated transport device, such as a crane (not shown) may move, for example long rails  38 . In a preferred embodiment the transport apparatus is automated, using a control system whereby the crane is moved to a predetermined location along each of the aisles  36 , and then moves loading forks, or similar loading apparatus, to a required rack or shelf to remove or deliver a container to the required rack or shelf location. 
         [0088]    The containers may also contain ingredients other then meat for meat processing. As mentioned above, these ingredients will primarily be bone in or bone out primal meat cuts. However, certain containers will contain other ingredients that may be used in a meat processing operation, for example breadcrumbs, by-products such as purge and trim and semi-finished goods. 
         [0089]    The removable, height adjustable shelves referred to above may be used for storing bone in cuts or other ingredients in the container. 
         [0090]    The containers are placed in the chiller to allow ageing of the meat (which may include chicken for example) while keeping bacterial growth to a minimum. For example, beef may typically be aged from five to seven days before it reaches a retail shelf. The time period for which the meat is aged will vary depending upon a number of factors such as the meat type and the cut type for example. 
         [0091]    The location and “age” of the ingredient(s) in each container is recorded and associated with the identity of the container in a database which forms part of the control system  13  ( FIG. 1 ). In this way the system knows when a container can or should be removed from the chiller, and where in the chiller it is located so that the moving operation can be performed efficiently. 
         [0092]    Once the meat cuts have aged, the containers are transported to production cells in step  4  ( FIG. 1 ). The production cells are provided in a production area generally referenced  40  ( FIG. 3 ) which has at least one production cell consisting of one or more machines sequentially arranged to produce one or more products from the ingredients provided in the containers. In the example shown in  FIG. 3  nine production cells (referenced  41  through  49 ) are provided. In a preferred embodiment, each cell comprises a dedicated production line for each primary product, for example bone-in, roasts, sliced, mince, diced/strips, crumbing, sausage, chicken. 
         [0093]    Further conveyor apparatus  26  ( FIG. 3 ) allows containers to be transported from the primal chiller to the production area  40 . The conveyor apparatus  26  interfaces with the transport apparatus in the primal chiller  31 . The control system  13  allows a request to be made in the production area for one or more containers or ingredients to be retrieved from the primal chiller. In a preferred embodiment the control system is implemented using a computerized device and includes business systems that may store data relating to many aspects of the process and related machinery, and include forecasting or predictive algorithms to manage performance and efficiency of the system. The control system allows software models to be constructed for the processes that occur in production cells, and the processes that occur throughout other parts of the system. In this way, the effect on productivity of changes to the system can be predicted. The control system tracks product through the plant in real time, so a real time record of inventory is provided, along with real time traceability of product. The system also allows forecasts to be provided. In this way the amount of product required in inventory (both at pre-retail product stage and the retail product stage) can be determined, together with production schedules, primal and other in-bound materials. Efficiency analysis and yields can also be monitored. The control system includes user interfaces, and interfaces with the automated machinery that it controls. 
         [0094]    Once a request for a container or an ingredient has been received, the control system instructs the transport apparatus within the primal chiller  31 , and the conveyor apparatus  26 , to select and retrieve one or more containers containing the requested ingredients and deliver those containers to the production area  40 . In the example shown in  FIG. 3 , the conveyor apparatus  26  discharges the containers to the production area at or about end  27  of the conveyor assembly. However, the conveyor apparatus  20  may be configured to convey the container directly to the selected production cell. Furthermore, conveyor apparatus  26  has a further delivery or entry point  28 . This may be used to discharge used containers so that those containers may undergo a cleaning and sterilisation process. Delivery or entry point  28  may also be used to deliver cleaned and sterilised containers to the production area so that these containers may be used to contain semi-finished products, by-products or unused ingredients, as will be described further below. 
         [0095]    Referring now to  FIG. 4 , a typical production cell is schematically illustrated in plan view. The production flow path through the cell is in the direction illustrated by arrow  50 . A container of a desired ingredient is directed to an unloading device  52  where the container is de-lidded (although in a preferred embodiment de-lidding and purge removal may occur prior to this point), and the unloading device lifts and/or rotates the container in such a way that the contents of the container are emptied under gravity for processing through processing apparatus  54 . Alternatively, contents can be unloaded manually, or only partially unloaded. Apparatus  55  de-nests retail trays to allow the retail products to be placed on the trays. De-nesting may occur at various points in the process, depending on when a tray is required. After placement on trays and processing, the products are buffered by a buffer conveyor  56  for provision to a wrapping machine  57 . Transfer to the wrapping machine occurs in step  5  ( FIG. 1 ). The wrapping process will typically consist of over-wrapping the tray and meat product with clear plastic film. The wrapped retail products are then buffered again on another buffer conveyor  58  to be conveyed for accumulation in a buffer chiller which is generally referenced  60  in  FIG. 3 . Transfer of the retail ready products to the buffer chiller occurs in step  6  in  FIG. 1 . 
         [0096]    Referring to  FIG. 5 , the output stage of the production cell is shown diagrammatically in plan view along with a diagrammatic view of automated storage apparatus  62  within the buffer chiller  60 . In  FIG. 5 , the production cell has an infeed conveyor assembly  64 . As each wrapped product exits the production cell, the infeed conveyor assembly aligns the packages (if necessary) and is indexed until a shelf lot of products is formed. A shelf lot comprises a predetermined number of wrapped products, the exact number being dependent on the package size. In a preferred embodiment the number of products is sixteen, although this number may be increased or decreased depending upon the overall design of the system. 
         [0097]    Once a shelf lot has been formed on conveyor  64 , the conveyor assembly streams the shelf lot onto a conveyor  66 . In a preferred embodiment conveyor  66  consists of a plurality of moveable individual fingers or rollers  68  which are driven so that the shelf lot moves as a group onto conveyor  66  with a desired (preferably substantially even) spacing. The conveyor is stopped when the products are in the required position adjacent to a shelf for transfer, as will be described further below. 
         [0098]    The accumulation device includes a carousel generally referenced  70  having a number of product support structures which take the form of shelves formed by individual elongate projecting elements  72  that are laterally spaced and arranged in horizontal rows. The elements  72  are preferably strong yet resilient, and are not prone to corrosion. We have found that a pultruded material such as that sold under the trade mark Pultron™ is a suitable material. The elements  72  are located sufficiently close to each other in a horizontal direction so that standard size retail meat packs are easily supported yet there is sufficient space between the elements to ensure that there is free air circulation so that there is significant volume of air impinging on the surfaces of the retail pack which ensures the contents of the pack are kept at a desired cool (preferably just above freezing) temperature. The elements  72  are spaced in a vertical direction to allow sufficient space to accommodate the height of the required size of retail pack. 
         [0099]    As can be seen in  FIG. 6 , the carousel system includes a number of shelf units  74 , each of which is rotatably connected by connector  76  to a flexible support such as chain  78 . The chain is in turn supported by rotatable sprockets  80  thereby forming a revolving carousel where the shelves formed by the elements  72  can be moved in the vertical direction for loading, unloading and storage purposes. As shown in this example, each shelf unit  74  preferably has a plurality of rows of shelves formed from the elements  72 . However, a greater or lesser number of shelves may be provided depending upon the dimensions of the retail packs to be stored using the system. 
         [0100]    The control system  13  is used to index the carousel by rotation of the sprockets so that the required shelf is in the correct position for transfer of the retail products to or from conveyor  66 . 
         [0101]    We have found that the appearance of red meat, and therefore its retail shelf life, can be improved by conditioning the meat. The conditioning process is performed by keeping the meat at as low a temperature as possible without allowing it to freeze for a predetermined period of time. This reduces oxygen consuming reactions in the meat, leading to an enhanced degree of oxygenation and increased colour stability. Therefore, rather than follow conventional practice and have the processed red meat products delivered to retail as soon as possible, we have found that it is advantageous to allow a conditioning period. This can be implemented in the accumulator since the time of delivery of each package to the accumulator is recorded. Therefore, when a retail order is received, the control system  13  checks the data to determine which products have been in the accumulator for the required period of time (typically about 7 hours-24 hours), and product that meets the requirements is despatched. Also, the control system can monitor demand for products (for example by looking at current or historical order information and economic and seasonal information) and adjust processing so that products are introduced into the accumulator at a rate whereby they will have sufficient time to be properly conditioned prior to despatch. 
         [0102]    The accumulator provides a solution to warehousing of retail packs in a manner which provides many benefits. It allows the packs to be efficiently cooled to meet the process requirements. It also enables the packs to be automatically accumulated and tracked without labels. This means that labeling (as will be described further below) can take place after receipt of orders and prior to dispatch without any manual intervention such as having to be unpacked from cartons or crates. It also allows flexibility in allocation to retail stores. That is to say orders can be met down to individual packs or alternatively allocation can be made individually across multiple stores. It also provides an automated method for warehousing and handling retail packs prior to retail distribution. 
         [0103]    Once retail or cabinet ready products need to leave the buffer chiller (typically as a result of a retail order being received), then the control system locates the appropriate products. As described above, the system has a record of the location of the products in the buffer chiller e.g. carousel  2 , shelf  15 , shelf region  5 . The appropriate carousel is activated to bring the required shelf into a transfer position, and the products are transferred onto a conveyor for delivery to a weigh labeler machine. This occurs in step  7  ( FIG. 1 ). Those skilled in the art will appreciate that the transfer mechanism could be moved to a shelf, rather than the shelf being moved to the transfer mechanism. 
         [0104]    The weigh labeling machine receives information relating to the pricing structure of the products that have been ordered for the particular retail outlet or the retail chain. This may include “specials” for example, or pricing and/or labeling information for other desired policies or promotions. The information is supplied from the control system  13  and allows the weigh labeling machine to weigh each product and provide a label identifying the product and the price accordingly. Dependent on the relevant pricing policy, some products may not require to be weighed for a price to be allocated. The weigh labeling machine is supplied with information as to the product type by the control system. For example, as a new shelf lot (or part shelf lot) of product from the buffer chiller is directed to the weigh labeling machine, the control system provides identity information on the product type to the weigh labeler. 
         [0105]    The labeled products then proceed to a sorting stage in step  8 .  FIG. 7  shows a schematic diagram of a sorting lane installation according to a preferred embodiment. The products from the weigh labeler are conveyed on a conveyor  90  past a number of sorting conveyors  91 . The control system  13  instructs the sorting conveyors to select products required to satisfy the relevant retail order. The selected products are moved from conveyor  91  by the sorting conveyors onto buffer conveyors  92  for supply to packing stations  93  where the products are placed in reusable sealable containers  94  that are dispatched for transport to the retail outlet via conveyor  95 . The products are supplied to the buffer conveyors  92  in a predetermined order so that they may be removed from the container  94  and placed on the retail shelves according to the shelf layout of the retail outlet to which the order is to be dispatched. In a preferred embodiment the sorting process required to achieve the correct order may be performed by the sorter conveyors on instruction from the control system. For example, the control system may know the identity of the product based on the position of the product on conveyor  90 , or a label reader such as a bar code or RFID label reader adjacent to the conveyor  90  may provide the control system with identity information for each product so that the control system knows which product to divert from the conveyor  90 . Alternatively the products may be discharged from the buffer chiller in the desired order. 
         [0106]    Referring to  FIGS. 8 and 9  the sorter conveyors  90  may comprise an endless belt  96  provided about rollers  97 , at least one of which is driven. The belt  96  includes paddles  98  that are arranged at an angle (preferably 45 degrees) to the direction of motion of the belt. The belt is arranged in use at an angle (preferably 45 degrees) to the conveyor  90  and the speed of the belt  96  is chosen so that the paddles  98  have the effect of exerting a force on the products that has substantially only a lateral direction. Therefore, the products are pushed sideways across conveyor  96 , providing minimal disturbance to the product and its packaging. 
         [0107]    The containers  94  may be the same as the containers within which the primals are stored (although cleaned and sterilized). An example of an appropriate container and storage method is disclosed in U.S. Pat. No. 6,054,161, the contents of which are incorporated herein by reference. A shelf system such as that shown and described in  FIG. 1C  may be used for stacking the cabinet ready products in container  94 . Upon the containers  94  being filled or partly filled in completion of the relevant retail order, they are lidded and sealed, and in a preferred embodiment the valve in the container lid is again used to modify the atmosphere within the container. These processes occur in step  9  ( FIG. 1 ). At this stage of the process it is preferred that a high oxygen atmosphere is provided by the gassing process, for example 80% oxygen. The conditioning process alone provides sufficient oxygenation of the meat to provide a stable desirable colour that is attractive to consumers, but we have found that the addition of further oxygen can enhance the colour and accordingly the retail shelf life of the product. Again, the chamber process (as described above with reference to  FIG. 2 ) may be used to perform the gassing operation. 
         [0108]    The filled containers of retail product may be transported by truck. In a preferred embodiment the truck, or other vehicle, includes conveyor means which allow containers to be transported to desired positions on the truck carrying tray or deck. As can be seen in  FIG. 10 , in a preferred embodiment the truck or vehicle tray  100  includes two conveyors  101  that may move containers longitudinally from the rear  102  of the truck toward the front  103 . Another two conveyors  104  provided in the centre of the tray move containers longitudinally from the back to the front. Two transfer conveyors  105  move the containers laterally between conveyors  101  and  104 . This mechanism effectively provides two paths (although a single path could be provided) for containers loaded on the tray and allows convenient and easy loading and unloading. The truck may, for example, be loaded with a full load of containers (e.g. four wide by eight deep). This can be achieved by introducing one container at a time to each of conveyors  101  and indexing those conveyors until the containers reach the front end  103  of the tray. The transfer conveyors can then move the container to the conveyors  104  to move them to the front of the tray. Alternatively, the containers can simply be moved onto the tray using a device such as a forklift. Full containers are likely in use to be unloaded one or two at a time at various retail outlets on a route followed by the vehicle. Typically, as each container is dropped off, an empty container is loaded onto the vehicle to replace it. The empty containers are cleaned and sterilized for re-use. The containers on conveyor  104  at the rear  102  of the tray are removed first, and when this occurs, the conveyors  101 ,  102  and  105  are all indexed to create one or more spaces at the rear end of conveyors  101 . This provides an easily accessible space at the rear of the vehicle where the operator may load on the empty containers. Apart from easing the operator&#39;s task, the system has the advantage that the vehicle load remains substantially balanced. In a preferred embodiment the container size is chosen so that maximum use is made of the vehicle carrying space. Thus, preferred dimensions enable containers to be placed four wide and stacked three high on a standard truck tray. 
         [0109]    Throughout this document the word “comprise” and variations thereof is intended to be interpreted in an inclusive sense. 
         [0110]    Where in the foregoing description reference has been made to specific components or integers of the invention having no equivalents, then such equivalents are herein incorporated as if individually set forth. 
         [0111]    Although this invention has been described by way of example and with reference to possible embodiments thereof, it is to be understood that modifications or improvements may be made thereto without departing from the scope of the invention as defined in the appended claims.