Patent Publication Number: US-11377246-B2

Title: Auto-feed assembly for modular filling systems

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of U.S. Provisional Application No. 62/740,594, filed Oct. 3, 2018, and U.S. Provisional Application No. 62/740,540, filed Oct. 3, 2018, the entireties of which are incorporated herein for any and all purposes. 
    
    
     TECHNICAL FIELD 
     This disclosure generally relates to devices and methods of filling flexible containers with flowable materials, and more particularly relates to adjustable and automated assemblies for introducing flexible containers into filler assemblies. 
     BACKGROUND 
     Liquid filling and packaging requires many different steps and separate components. Depending on the desired setup, the process from start to finish can include preparing the liquid, preparing the packaging, moving the liquid into the package, and sealing the package with the liquid therein, as well as other steps, such as sterilizing, labeling, and organizing the packaging with liquid for storage or transportation. Each component responsible for any of the necessary steps must be maintained, serviced, and prepared such that it can work with each of the other related components. As more components are introduced into a system, more control is necessary to ensure proper interaction between all of the components to prepare the final product. Additionally, the assembly-line-type structure of the system often requires a specific order of processes. Such requirements result in needing multiple large machines and inconvenient component setups. It is often difficult to change one or more components in such systems in order to prepare a different product. Similarly, components are difficult to remove or replace. As such, it is desirable to have an assembly system that can operate with different interchangeable components that can be organized as necessary. 
     There are shortcomings with the conventional assemblies. Flexible containers have to be introduced into the filler machines by operators who have to manually place the flexible containers therein and to orient the flexible containers in the desired position. The flexible containers have to be maintained in the proper orientation and position, as well as kept flat and not creased or folded, during operation of the filler assembly. The operators have to reach into the assembly to position, adjust, and maintain the flexible container, which increases risk of injury and requires longer preparation times and more operators for the necessary operation. Therefore, there is a need for improved assemblies to automate the process of placement of flexible containers and maintaining them in the needed positions. 
     SUMMARY 
     The foregoing needs are met by various aspects of adjustable table assemblies disclosed. According to an aspect of the disclosure, an adjustable table assembly for use in a filler assembly includes a table having a top surface configured to receive a flexible container thereon and a clamp disposed on the table and configured to releasably secure the flexible container to the table. The table has an infeed end and an outfeed end opposite the infeed end. The table is movable along a plurality of rails affixed to the filler assembly. The table is movable between a loading position, in which the table is configured to receive the flexible container, and an operating position, in which the table is inside the filler assembly. The movement of the table along the plurality of rails is along a first axis. 
     Optionally, the adjustable table assembly may further include a slot defined on the top surface of the table, the slot being configured to receive the flexible container therein. The clamp may be disposed adjacent to the slot and is configured to releasably secure the flexible container in the slot. 
     Further optionally, the flexible container may be a bag having a spout extending therefrom. 
     The top surface may define a dimpled textured thereon. 
     The clamp may have an open configuration, in which the flexible container is not secured therein, and a closed configuration, in which the flexible container is secured in the clamp. The clamp may include a first clamping side, a second clamping side opposite the first clamping side, and an actuator. The actuator may be configured to move at least one of the first and second clamping sides towards the other of the first and second clamping sides when the clamp is moved into the closed configuration, and away from the other of the first and second clamping sides when the clamp is moved into the open configuration. The first clamping side and the second clamping side each may include an elastic layer thereon, the elastic layers on each of the first and second clamping sides being configured to contact the flexible container when the clamp is in the closed configuration. 
     The adjustable table assembly may optionally further include a height adjustment assembly configured to be actuated to move the table along a second axis that is perpendicular to the first axis. The height adjustment assembly may include a plurality of first heads fixedly attached to the table, a plurality of second heads fixedly attached to the plurality of rails, and a connector attached to both the first and second heads. The connector may be configured to be moved such that the first and second head are movable closer to each other or farther from each other. 
     In some aspects, the table may define a front face at the infeed end, the front face being connected to the top surface at an edge. In some aspects, the front face may be rounded. In some aspects, the edge may be rounded to have a curvature radius of between 0.25 inches and 5 inches. In some aspects, the curvature radius may be between 0.5 inches and 4 inches. In some aspects, the curvature radius may be between 1 inch and 3 inches. In some aspects, the curvature radius may be 2 inches. 
     The clamp may be disposed closer to the outfeed end of the table than to the infeed end. 
     The adjustable table assembly may further include an adjustable rail assembly configured to guide the flexible container along the table. The adjustable rail assembly may include two parallel rails that define a space therebetween, the space being configured to receive the flexible container therein. The adjustable rail assembly may be configured to change the space between the two parallel rails, wherein at least one of the two parallel rails may be configured to be moved to change the dimensions of the space between the two parallel rails. 
     According to another aspect, a method of feeding a flexible container into a filler assembly using an adjustable table assembly having a table and a clamp includes the steps of moving the table along a first axis in a first direction into a predetermined loading position; introducing the flexible container at an infeed end of the table and onto a top surface defined on the table; securing the flexible container in a clamp disposed on the adjustable table assembly; and moving the table along the first axis in a second direction opposite the first direction and into a predetermined operating position. 
     Optionally, the method may further include the step of moving the flexible container into a slot defined on the top surface of the table. 
     The method may further include moving the table along a second axis perpendicular to the first axis when the table is in the predetermined loading position. 
     The method may further include actuating operation of the filler assembly after moving the table into the predetermined operating position. 
     The method may further include positioning at least one safety guard adjacent to the adjustable table assembly after moving the table into the predetermined operating position. 
     According to another aspect of the disclosure, a filler assembly for moving a flowable material into a flexible container may include an adjustable table assembly. The adjustable table assembly for use in a filler assembly includes a table having a top surface configured to receive a flexible container thereon and a clamp disposed on the table and configured to releasably secure the flexible container to the table. The table has an infeed end and an outfeed end opposite the infeed end. The table is movable along a plurality of rails affixed to the filler assembly. The table is movable between a loading position, in which the table is configured to receive the flexible container, and an operating position, in which the table is inside the filler assembly. The movement of the table along the plurality of rails is along a first axis. 
     The adjustable table assembly in the filler assembly may further include a slot defined on the top surface of the table, the slot being configured to receive the flexible container therein. The clamp may be disposed adjacent to the slot and is configured to releasably secure the flexible container in the slot. The flexible container may be a bag having a spout extending therefrom. The top surface may define a dimpled textured thereon. The clamp may have an open configuration, in which the flexible container is not secured therein, and a closed configuration, in which the flexible container is secured in the clamp. The clamp may include a first clamping side, a second clamping side opposite the first clamping side, and an actuator. The actuator may be configured to move at least one of the first and second clamping sides towards the other of the first and second clamping sides when the clamp is moved into the closed configuration, and away from the other of the first and second clamping sides when the clamp is moved into the open configuration. The first clamping side and the second clamping side each may include an elastic layer thereon, the elastic layers on each of the first and second clamping sides being configured to contact the flexible container when the clamp is in the closed configuration. 
     The adjustable table assembly in the filler assembly may optionally further include a height adjustment assembly configured to be actuated to move the table along a second axis that is perpendicular to the first axis. The height adjustment assembly may include a plurality of first heads fixedly attached to the table, a plurality of second heads fixedly attached to the plurality of rails, and a connector attached to both the first and second heads. The connector may be configured to be moved such that the first and second head are movable closer to each other or farther from each other. In some aspects, the table may define a front face at the infeed end, the front face being connected to the top surface at an edge. In some aspects, the front face may be rounded. In some aspects, the edge may be rounded to have a curvature radius of between 0.25 inches and 5 inches. In some aspects, the curvature radius may be between 0.5 inches and 4 inches. In some aspects, the curvature radius may be between 1 inch and 3 inches. In some aspects, the curvature radius may be 2 inches. The clamp may be disposed closer to the outfeed end of the table than to the infeed end. 
     The adjustable table assembly in the filler assembly may further include an adjustable rail assembly configured to guide the flexible container along the table. The adjustable rail assembly may include two parallel rails that define a space therebetween, the space being configured to receive the flexible container therein. The adjustable rail assembly may be configured to change the space between the two parallel rails, wherein at least one of the two parallel rails may be configured to be moved to change the dimensions of the space between the two parallel rails. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present application is further understood when read in conjunction with the appended drawings. For the purpose of illustrating the subject matter, there are shown in the drawings exemplary aspects of the subject matter; however, the presently disclosed subject matter is not limited to the specific methods, devices, and systems disclosed. In the drawings: 
         FIG. 1  depicts an isometric perspective view of an adjustable table assembly according to an aspect of the disclosure; 
         FIG. 2  depicts a bottom perspective view of the adjustable table assembly of  FIG. 1 ; 
         FIG. 3  depicts another isometric perspective view of the adjustable table assembly of  FIGS. 1 and 2 ; 
         FIG. 4  depicts an isometric view of a portion of the adjustable table assembly of  FIGS. 1-3 ; 
         FIG. 5  depicts an adjustable rail assembly according to an aspect of the disclosure; 
         FIG. 6  depicts a filler assembly with an adjustable table assembly according to an aspect of the disclosure; 
         FIG. 7  depicts a filler assembly with a flexible container according to an aspect of the disclosure; 
         FIG. 8  depicts a filler assembly with an adjustable table assembly and an adjustable rail assembly according to an aspect of the disclosure; 
         FIG. 9  depicts a filler assembly with an adjustable table assembly and an adjustable rail assembly and with a flexible container according to an aspect of the disclosure; 
         FIG. 10  depicts a filler assembly according to an aspect of the disclosure; 
         FIG. 11  depicts an adjustable table assembly according to another aspect of the disclosure; and 
         FIG. 12  depicts a flow chart showing a process of feeding a flexible container into the adjustable table assembly according to an aspect of the disclosure. 
     
    
    
     Aspects of the disclosure will now be described in detail with reference to the drawings, wherein like reference numbers refer to like elements throughout, unless specified otherwise. 
     DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     Filler assemblies are used with flowable substances and flexible containers, such as bags. The filler assemblies can form, fill, seal, and/or prepare the bags for shipment. It will be appreciated that the same filler assembly can be utilized for one or more of the above steps, or, alternatively, separate filler assemblies can be used that are responsible for different stages of the process. 
     The filler assemblies should be designed to use as many components that are used in filling processes as possible. The filler assembly can be operated with a wide range of pouch sizes, spouts and caps, fill orientations, and various loading methods, such as side loading, flat drop, spout trailing, spout leading, and front and rear discharge. A filling area should be designed to handle a variety of filling requirements, such as ambient fill, ESL, Aseptic, Hot-fill, and other suitable filling concepts. The components present in the filler assembly allow for modularity of design, quick changeover and adjustments, and tool-less design considerations. 
     The filler assembly can operate with a wide range of suitable products and processing protocols. Suitable products include, but are not limited to, wine, syrup, water, carbonated beverages, other beverages, and industrial products. It will be under stood that the filling and production rate will depend on the product type, the fitment size, the specific components within the assembly, and other parameters of the filler machine assembly. 
     Depending on the specific arrangement of the filler assembly, the assembly may operate at different filling rates, for example, at 10 to 200 gallons per minute (GPM), at 40 to 150 GPM, at 60 to 100 GPM, at 80 to 90 GPM, or at another suitable range of filling rates. The assembly can be designed to fill the desired number of bags at different rates that can be adjusted based on the product, bag size, and other components in the assembly. In some aspects, the machine can fill 1-gallon bags at a rate of at least 10 bags per minute (BPM), preferably at least between 12 and 14 BPM. For 2.5-gallon bags, the assembly may be designed to fill the bags at a rate of at least between 10 and 12 BPM. For 5-gallon bags, the assembly may be designed to fill the bags at a rate of at least between 8 and 10 BPM. It will be understood that it will be preferable to achieve higher filling rates where possible without sacrificing quality or elimination necessary steps. 
     The filler assembly may utilize any suitable flow meter to measure the flow of the product being introduced into the bags. 
     While any suitable materials can be used to manufacture the filler assembly, it will be appreciated that the assembly should withstand repetitive use and be easily serviced, cleaned, and sterilized. A frame of the assembly may be constructed of a metal, such as stainless steel. In some aspects, the frame includes 304 stainless steel. The frame may include non-metal components, which should be approved for use in food applications. 
     The assembly may include various components for preparing a bag with a product therein. The assembly may include an inlet for the bag and/or product, a bag separator, a bag loader, a filling head, a capping assembly, and a suitable exit for the final product out of the assembly. 
     In existing filler systems, a flexible container (e.g., a bag to be filled with a product) is introduced into the filler machine and is moved through the various components until it engages with a pusher assembly that moves the flexible container further through the system. However, this requires passing the flexible container under the product filler in the modular filler assembly. This is difficult because this requires maneuvering the flexible container around various components. The bag has to be manually inserted into the machine, properly positioned and oriented, and then pulled/pushed manually until the bag is in the desired filling position. 
     To achieve this, the operator (or operators) have to access the interior of the filler assembly during the loading and feeding process. This increases the risk of injury as the operators place their limbs into the assembly and in proximity to moving components during operation. Since the operators have to access the interior of the assembly, any protective covers or safety guards have to be removed, disabled, or be generally absent, which further increases chances of injury. The manual insertion, positioning, and movement of the bag also leads to inconsistencies between different loads due to the human factor, user error, differences in trainings, and capabilities of different operators. The entire manual process also requires more time to achieve, as well as more operators to do it. 
     The adjustable table assemblies disclosed herein allow for more automation during loading to increase safety, efficiency, and consistency during the loading process. Referring to  FIGS. 1-11 , an adjustable table assembly  10  is disclosed. The adjustable table assembly  10  includes a table  100  configured to receive a bag  1  thereon. The table  100  includes a top surface  104  configured to contact the bag  1 . The top surface  104  may be substantially planar. In some aspects, the top surface  104  may be substantially smooth to prevent the bag  1  from catching on the table  100  or from otherwise ripping or deforming. In some aspects, the top surface  104  may be “rigidized” to define a texture or pattern  106 , such as ridges, bumps, dimples, or another suitable pattern. Such a texture or pattern  106  may help prevent the bag  1  from sticking to the top surface  104  due to static adhesion or surface-to-surface interaction between the smooth bag  1  and the smooth top surface  104 . The texture or pattern  106  may provide enough of a physical break along the contact points between the top surface  104  and the bag  1  to allow the bag  1  to lie substantially flat on the top surface  104  while preventing it from adhering thereto. The table  100  may be constructed from stainless steel. 
     The table  100  is configured to receive the bag  1  from an infeed end  108 . An operator (not shown) can introduce the bag  1  at the infeed end  108  onto the top surface  104  of the table  100 . The bag  1  can be moved along the top surface  104  from the infeed end  108  towards an outfeed end  112  opposite the infeed end  108 . The infeed end  108  may include a front face  116  that is connected with the top surface  104  at an edge  118 . 
     The front face  116  may be substantially planar or, in some aspects, the front face  116  may be curved. The edge  118  may also be curved or beveled such as to avoid a sharp corner edge. In some aspects, the edge  118  may have be rounded to have a curvature radius of between about 0.25 in and about 5 in, between about 0.5 in and about 4 in, between about 1 in and about 3 in, or another suitable range or combination of above ranges. In some aspects, the edge  118  may have a curvature radius of about 2 in. In some aspects, the front face  116  may comprise the curvature radius of the edge  118 . The curvature of the edge  118  and/or the front face  116  may prevent the bag  1  from catching on a sharp corner of the table  100 , thus decreases the chances of damage to the bag. Such a front face  116  and/or edge  118  may also allow for the bag  1  to be flattened and/or to remain flat during the feeding process due to the edge  118  being in contact with the bag  1  across the entire width of the bag  1  during the feeding step. 
     As the flexible bag  1  is fed onto the table  100 , the flexible nature of the bag  1  may lead to wrinkling or folding of the bag  1 , or another deformation of the bag  1 . This is often not desirable because if the bag is not kept flat, the orientation of the bag  1  may change during the feeding process, the bag  1  can catch on other components and sustain rips or other damage, and/or the bag  1  may be improperly filled by the filling assembly. Furthermore, due to the automated nature of the feeding process, after the bag  1  has been introduced to the table  100 , the filling assembly automatically moves the bag  1  along the top surface  104  towards the filling components. This requires each bag  1  to be in the same proper orientation when it is on the top surface  104  so that the filling assembly may properly automate the movement of the bag  1 . 
     In some aspects, a plurality of bags  1  are fed onto the adjustable table assembly  10 . Each of the plurality of bags  1  may be removably connected to an adjacent bag  1 , for example, along a perforated boundary (not shown) that is configured to be severed during the forming and filling process. The plurality of bags  1  may be disposed in a known arrangement, for example, in folded sheets or in rolls. When the plurality of bags  1  are fed onto the table  100 , it may be even more advantageous to keep the bags  1  flat along the top surface  104  or to flatten them and orient them properly if they are not flat and oriented as necessary when they are introduced. 
     The structure at the infeed end  108  described above facilitates in maintaining the proper orientation of the bags  1  and keeping them flat, as well as helping to orient, flatten, and generally correct the positioning of the bags  1  when introduced as a plurality of bags  1 , such as from a set of sheets or a roll. The front face  116  and/or the edge  118  provide a physical baffle that may be contacted by the bags  1  as they are fed at the infeed end  108  and moved to the top surface  104  of the table  100 . The flexible bags  1  contact and slide along and over the front face  116  and/or the edge  118  and are flattened or kept flat by the physical interaction with the front face  116  and/or the edge  118 . 
     In existing arrangements, another component (e.g. a pusher or another weight) may hold the bags  1  flat and in the desired orientation as the operators manually move the bag  1  along the table. The features described above provide a more efficient solution to positioning the bags  1 . 
     The table  100  includes a mechanism for releasably fixing the bag  1  thereto. This prevents the bag  1  from being dislodged during the feeding process after the operator finishes placing the bag  1  onto the table  100 . Referring to  FIGS. 1-4 , the table  100  may define an opening therethrough configured to receive the bag  1  therein. The opening may be a slot  120  defined on the top surface  104 . Although the slot  120  may be positioned at any portion of the top surface  104  depending on the type of bag and desired use, in some preferred aspects, the slot  120  is closer to the outfeed end  112  than to the infeed end  108 . The slot  120  should be dimensioned such that at least a portion of the bag  1  may fir therein. For example, the slot  120  should be at least as wide as the widest bag  1  that can be used with the adjustable table assembly  10  and at least as long (measured orthogonally to the width) as the thickness of the thickest bag  1  that can be used. The slot  120  may be a through-hole that extends from the top surface  104  all the way through the table  100 , or, alternatively, the slot  120  may be a blind bore that is open at the top surface  104  but does not extend all the way through the table  100 . 
     A fixing mechanism configured to releasably hold the bag  1  in the slot  120  may be disposed in the adjustable table assembly  10 , for example, on the table  100 . The fixing mechanism may be a clamp  124 . Referring to the exemplary aspect shown in  FIGS. 2 and 4 , the clamp  124  may include a first clamping side  124   a  and a second clamping side  124   b  opposite the first clamping side  124   a . The clamp  124  has an open configuration, in which the first and second clamping sides  124   a ,  124   b  are spaced apart from each other, and a closed configuration, in which the first and second clamping sides  124   a ,  124   b  contact one another. In some aspects, when the clamp  124  is moved from the open to the closed configuration, one of the first and the second clamping sides  124   a ,  124   b  may be moved towards the other of the first and second clamping sides  124   a ,  124   b  to contact the other of the first and second clamping sides  124   a ,  124   b . In some aspects, both the first and second clamping sides  124   a ,  124   b  may be moved towards one another and contact one another to place the clamp  124  in the closed configuration. To toggle the clamp  124  into the open configuration from the closed configuration, the first, second, or both clamping sides  124   a ,  124   b  may be moved in the opposite direction as when moving to the closed configuration, such that the first and second clamping sides  124   a ,  124   b  do not contact one another. 
     The clamp  124  may include an actuator  132  configured to move the clamp  124  between the open and closed configurations. The actuator  132  may be a piston cylinder or another suitable actuating mechanism configured to push and/or pull one of the first and second clamping sides  124   a ,  124   b . In some aspects, a plurality of actuators  132  may be present, for example, one actuator to move the first clamping side  124   a  and another actuator to move the second clamping side  124   b.    
     The first, second, or both of the first and second clamping sides  124   a ,  124   b  may include an elastic layer  128  thereon to contact the bag  1  when the bag  1  is in the slot  120 . The elastic layer  128  may include rubber. The increased friction between the elastic layer  128  and the bag  1  helps retain the bag  1  within the clamp  124  and the slot  120 . Additionally, the elastic layer  128  is softer than the material of the first and second clamping sides  124   a ,  124   b , and thus decreases wear on the bag  1  and prevents ripping or unnecessary crushing of the bag  1  in the clamp  124 . 
     When the bag  1  is introduced into the slot  120 , the clamp  124  may be actuated to move to the closed configuration to secure the bag  1  between the first and second clamping sides  124   a ,  124   b . The actuation of the clamp  124  may be manual (e.g. the operator may move the clamping sides into the closed position via a lever, button, or another tool) or automatic (e.g. the adjustable table assembly  10  may detect the bag  1  inside the slot  120  and cause the clamp  124  to move into the closed configuration). When the bag  1  has been fed into the assembly and needs to be moved further along the table  100 , the clamp  124  is moved into the open configuration, thus releasing the bag  1 . The bag  1  can then exit the slot  120  as the bag  1  is moved. 
     Releasably fixing the bag  1  in the slot  120  allows for the bag  1  to remain in the desired orientation along the top surface  104  as the adjustable table assembly  10  is being used. If no fixing mechanism is present, the bag  1  can move out of alignment. This can lead to the assembly failing to move the bag therethrough, the bag  1  can get caught in other components and get ripped or damaged, the bag  1  may fold or wrinkle, and/or the filling process may be hindered. 
     Although the figures depict a slot  120 , it will be appreciated that the adjustable table assembly  10  may be designed without a slot  120  and simply have a clamp  124  that, when closed, has a clamping side that contacts the top surface  104  of the table  100 , thus securing the bag  1  thereto. However, the disclosed aspects may offer advantages over such existing clamping technologies because, as disclosed, the bag  1  is clamped away from the top surface  104 , thus keeping the top surface  104  substantially flat and free from clamping components. If a clamp were to be disposed on the top surface  104 , the clamp would have to be positioned above the table  100  and in the way of the other components. Additionally, if the clamp were to contact the top surface  104  (i.e. if the top surface  104  operates as one of the first and second clamping sides  124   a ,  124   b ), then the top surface  104  cannot have an elastic layer  128 ; the presence of an elastic layer  128  on the top surface  104  would render the top surface  104  inconsistent and not flat, which would interfere with the movement of the bag  1  along it, as well as increase irregularity of the surface that provides more edges for the bag  1  to catch on and become damaged or creased. If, for example, the top surface  104  does not have an elastic layer  128 , then the clamp may damage the bag  1  when the clamp is closed due to the more rigid material of the top surface  104  and the pressure generated by the clamp required to hold the bag  1  in place. As such, it may be advantageous in some aspects to have the clamp  124  disposed in or adjacent to the slot  120  and to have the bag  1  be introduced into the slot  120  while the top surface  104  remains substantially flat and consistent. 
     The adjustable table assembly  10  allows for easier access to the table  100  for the operator during loading of the bags  1 . A series of rails are disposed in the assembly that allow for movement of components. Referring again to  FIGS. 1-4 , a pair of fixed rails  140  are fixedly attached to the filler assembly  3 . A pair of sliding rails  144  slidably contacts the pair of fixed rails  140 . Each of the sliding rails  144  is configured to slide along or a respective fixed rail  140 . The sliding rails  144  are attached to the table  100 . Thus, the table  100  may be slidably moved along the fixed rails  140  along a first axis A 1 . In a loading position, the table  100  is moved at least partly out of the filler assembly  3  towards the operator (not shown), who can then feed the bags  1  onto the table  100 . When the placement of the bags  1  is complete, the table  100  may then be slidably moved into the operating position back inside the filler assembly  3  away from the operator. The distance that the table  100  may be moved is dictated by the available space in the manufacturing facility, the size of the bags  1  used, and the specific feeding process by the operator. The fixed rails  140  and/or the sliding rails  144  may also include physical stops (not shown) to prevent movement of the table  100  beyond a predetermined position. In some aspects, a handle  170  may be disposed on the table  100  or on the sliding rails  144  for the operator to use to pull the table  100  into the loading position and to push the table  100  into the operating position. Although two sets of rails are depicted (i.e. the fixed rails  140  and the sliding rails  144 ), it will be appreciated that more sets of rails can be utilized to achieve the same arrangement and movement capability of the table  100 . 
     In some aspects, the adjustable table assembly  10  may be configured to change the relative height of the table  100  (e.g. relative to the floor or the operator) along a second axis A 2 . In some aspects, for example, the second axis A 2  may be substantially perpendicular to the first axis A 1 . A height adjustment assembly  150  may be disposed on the table  100  or on the rails  140 ,  144 . Referring to  FIG. 4 , the height adjustment assembly  150  may include a first head  154  that is fixedly attached to the table  100  and a second head  158  that is fixedly attached to the sliding rail  144 . The first head  154  and the second head  158  may be connected to each other by an adjustable and movable connector  156  that can be moved to change the distance between the first and second heads  154 ,  158 , for example, a screw, an adjustable rod, a step-wise or incremental engagement, or another suitable mechanism for moving the first and second heads  154 ,  158  towards or away from each other and securing them in the desired positions. The greater the distance between the first and second heads  154 ,  158 , the higher the table  100  may be positioned. Conversely, to lower the table  100 , the distance between the first and second heads  154 ,  158  can be decreased. 
     It will be appreciated that the height adjustment assembly may include a plurality of first heads  154  and a plurality of second heads  158  that engage with respective first heads  154  (e.g. four first heads  154 , with one at each corner of the table  100 ). The second heads  158  may attach directly to the sliding rails  144 , or, as depicted in aspects shown in  FIG. 4 , the second heads  158  may attach to a transverse rod  162  that is in turn fixedly connected to the sliding rails  144 . 
       FIG. 12  depicts a process  300  for loading the bags  1  onto the adjustable table assembly  10 . In step  304 , the operator moves the table  100  into the loading position. The table  100  is pulled along the rails  140 ,  144  out of the filler assembly  3  so that the operator can access the top surface  104  without reaching into the filler assembly  3 . 
     In step  308 , the operator introduces the bag  1  onto the table  100 , such that the bag  1  lies flat on the top surface  104 . The bag  1  may contact the front face  116  and/or the edge  118 . In some aspects, where a plurality of bags  1  is used, the operator introduces the first of the plurality of bags  1  and arranges the rest of the bags (e.g. in connected sheets or in a roll) such that they can easily be moved into the filler assembly  3  when the automated process begins. 
     In step  312 , the operator inserts a portion of the bag  1  into the slot  120  to secure it. The clamp  124  may be actuated to hold the bag  1  in place. If the clamp  124  is automatically actuated, it moves into the closed configuration when the operator inserts the bag  1  into the slot  120 . If the clamp  124  is manually actuated, then the operator actuates that clamp  124  to close after inserting the bag  1  into the slot  120 . The actuation can be done by moving the clamp  124  or electronically by pushing a button. 
     In step  316 , after the bag  1  is disposed in the desired orientation and secured in the slot  120 , the operator moves the table  100  into the operating position by sliding the table  100  along the rails  140 ,  144  back inside the filler assembly  3 . Once the table  100  is inside the filler assembly  3 , the operator no longer needs to reach inside the filler assembly  3 , which further decreases chances of injury or damage to the components. 
     When the table  100  is in the operating position, the filler assembly  3  may be actuated to perform all of the necessary steps described above. The bags  1  that are loaded into the adjustable table assembly  10  may be moved along the table  100  towards the filling components. 
     In some aspects, optional steps may be taken before, during, or after the process described above. If the height of the table  100  needs to be adjusted, this may be done by the operator by moving one of the first and second heads  154 ,  158  towards the other of the first and second heads  154 ,  158  (to lower the table  100 ) or away from the other of the first and second heads  154 ,  158  (to raise the table  100 ). 
     The filler assembly  3  further includes a pusher  200  configured to contact the bag  1 , for example at the bag&#39;s spout  2 , and move the bag  1  along the table  100  and towards the other components of the filler assembly  3 . To facilitate keeping the bag  1  in the desired orientation, an adjustable rail assembly  201  may be configured to movably be placed on top of or adjacent to the bag  1  when the bag is on the table  100 . The adjustable rail assembly  201  includes two rails  204  that are substantially parallel to each other and that define a space  212  therebetween. The space  212  is dimensioned to receive the spout  2  of the bag  1 . The rails  204  act as guides for the spout  2  and to the attached bag  1 . The two rails  204  are positioned at a distance d away from each other. The distance d may be changed in order to accommodate a differently sized spout  2 . It will be appreciated that the distance d should be nominally greater than the diameter of the spout  2 , but small enough that the spout  2  can be guided along the rails  204 . The parallel rails  204  may be shaped such that the two rails  204  are parallel for a portion thereof, but are splayed outward at an end thereof where the spout  2  of the bag  1  is configured to enter the space  212 . This splaying may allow for a wider mouth to capture the spout  2  as the bag  1  is moved towards and into the space  212 . 
     The distance d may be adjusted by moving one or both of the rails  204  towards or away from each other. For example, in some aspects as shown in  FIG. 5 , one or more knobs  220  may be rotated to move the one or both rails  204 ; rotating the knob  220  in a first direction may move the one or both rails  204  closer to each other, while rotating the knob  220  in a second direction opposite the first direction may move the one or both rails  204  away from each other. In some aspects, the position may be secured with a releasable lever  224 . The adjustable rail assembly  201  may be movable within the filler assembly  3  such that it can be moved away from the table  100  when the bag  1  is being loaded and then moved towards the table  100  when the table  100  is in the operating position. The pusher  200  may be configured to contact the bag  1 , for example at the spout  2 , and to push it in the desired direction. The position, orientation, and flat arrangement of the bag  1  may be maintained while the pusher  200  is moving the bag  1  by the presence of the adjustable rail assembly  201  to guide the bag  1 . When the pusher  200  is configured to begin moving the bag  1 , the clamp  124  may be actuated to move to the open configuration, thus releasing the bag  1 . As the pusher  200  pushes the bag  1  along the table  100 , the portion of the bag  1  that was inserted into the slot  120  exits the slot  120 . 
       FIGS. 6-10  depict aspects of filler assemblies  3  that include adjustable table assemblies  10  and, optionally, the pusher  200  and/or the adjustable rail assembly  201 . 
     The depicted auto-feed assembly allows for the flexible container (e.g. the bag  1 ) to be pre-fed into the system. The flexible container is introduced into the auto-feed assembly, and the auto-feed assembly is configured to move the flexible container through the modular filler machine to the pusher assembly. This eliminates the need to manually feed the flexible container through the inconvenient portions of the system. 
     The auto-feed assembly can be translated and/or rotated within the modular filler assembly such that the auto-feed assembly can be engaged at any of the inlets into the modular filler assembly. The auto-feed assembly is configured to receive the flexible container (e.g. flexible bag, such as a bag used in the Bag-in-Box industry) and to move the flexible container to its desired position within the modular filler assembly. 
     The auto-feed assembly can be configured to automatically position the flexible container based on the flexible container&#39;s parameters (e.g., size, thickness, material, spout, etc.). The automation can be actuated either by a pre-determined program or recipe received from a controller interface, or from another method of instructing the auto-feed assembly to move. 
     Movement of the auto-feed assembly can be accomplished by a motor, such as, but not limited to, servo motor, stepper motor, linear motor, A/C motor, DC motor, air motor, pneumatic actuator, hydraulic actuation linear positioning encoder, nip drive roller, or another suitable mechanism for actuating movement. 
     While systems and methods have been described in connection with the various embodiments of the various figures, it will be appreciated by those skilled in the art that changes could be made to the embodiments without departing from the broad inventive concept thereof. It is understood, therefore, that this disclosure is not limited to the particular embodiments disclosed, and it is intended to cover modifications within the spirit and scope of the present disclosure as defined by the claims.