Abstract:
Disclosed herein is a foam-in-bag dispensing system, including a dispensing apparatus operative to dispense foam precursor, the foam precursor being configured for expanding and solidifying into a polymeric foam, to a dispensing location between first and second web plies extending respectively on first and second sides of the dispensing apparatus; and a bag-status indicator associated for providing an indication to the operator indicative of the readiness of the bag for removal from the device for avoiding premature bag removal.

Description:
TECHNICAL FIELD  
       [0001]    The present disclosure is directed to a dispensing system and components therefore. In particular, the present disclosure is directed to a foam-in-bag dispensing apparatus used to produce foam-filled bags, and components having application in the foam-in-bag apparatus. 
       BACKGROUND  
       [0002]    Foam material dispensers have been developed including those directed at dispensing polyurethane foam precursor that are mixed together to form a polymeric product. The chemicals are often selected so that they harden following a generation of carbon dioxide and water vapor, and they have been used to form “hardened” (e.g., a cushioning quality in a proper fully expanded state) polymer foams in which the mechanical foaming action is caused by the gaseous carbon dioxide and water vapor leaving the mixture. 
         [0003]    In particular techniques, synthetic foams such as polyurethane foam are formed from liquid organic resins and polyisocyanates in a mixing chamber (e.g., a liquid form of isocyanate, which is often referenced in the industry as chemical “A”, and a multi-component liquid blend called polyurethane resin, which is often referenced in the industry as chemical “B”). The mixture can be dispensed into a receptacle, such as a package or a foam-in-place bag, where it reacts to form a polyurethane foam. 
         [0004]    One particular problem with existing foam-in-bag dispensing apparatus is that, during use, the operator thereof may be prone to remove the bag from the apparatus too early. If a bag is pulled to early, the bag and/or the subsequent bag being filled, may not be properly sealed, or the bag being pulled may not have been fully cut from the film web from which the bag is made. Premature pulling of the bag can slide the film within the sealing and cutting mechanism and cause the sealing and/or cutting to fail or to be made incorrectly. In some cases, the pulled bag and the next bag do not get sealed or separated from each other. In other cases, the bag may be partially sealed and/or cut, and one or both bags can open, resulting in the fluid foam precursors to spill out. 
         [0005]    Thus, an improved manner of helping to ensure that bags are not pulled prematurely is needed. 
       BRIEF SUMMARY OF THE DISCLOSURE  
       [0006]    In one embodiment, disclosed herein is a foam-in-bag dispensing system, including a dispensing apparatus operative to dispense foam precursor, the foam precursor being configured for expanding and solidifying into a polymeric foam, to a dispensing location between first and second web plies extending respectively on first and second sides of the dispensing apparatus; and a bag-status indicator associated for providing an indication to the operator indicative of the readiness of the bag for removal from the device for avoiding premature bag removal. 
         [0007]    The bag-status indicator is associated with a cutting mechanism for providing an indication to the operator indicative of the completion of the cutting operation. The indicator may be indicative of the cutting operation being sufficiently completed to allow a separation of the bags without pulling the film through the sealing mechanism and ruining the seal. A sealing mechanism may be included to seal the web plies to each other to trap the foam precursor therebetween to form a filled bag, wherein the indicator is indicative of the sealing operation being sufficiently completed to allow a separation of the bags with the bag fully sealed. The indicator may be further indicative of the cutting operation being sufficiently completed to allow a separation of the bags without pulling the film through the sealing mechanism and ruining the seal. 
         [0008]    A controller may be included that is operably connected to the indicator and the dispensing apparatus, wherein the controller is configured to send a signal to the indicator indicative of the readiness of the bag for removal. The controller may provide an indication when the bag is ready to be removed. The controller may provide an indication when the bag is not yet ready to be removed. 
         [0009]    The bag-status indicator may include a visual indicator. The visual bag-ready indicator may include a light. The visual bag-ready indicator may be positioned on a control panel of the dispensing system. The bag-status indicator includes an audible indicator. 
         [0010]    In another embodiment, disclosed herein is a method of providing a foam-in-bag cushion using a foam-in-bag dispensing system, including dispensing a foam precursor, the foam precursor being configured for expanding and solidifying into a polymeric foam, into a dispensing location between first and second web plies extending respectively on first and second sides of the dispensing apparatus; and providing an indication, using a bag-status indicator, to the operator indicative of the readiness of the bag for removal from the device for avoiding premature bag removal. 
         [0011]    The method may include operating a cutting mechanism to cut a filled bag formed from the web from a remaining portion of the web, wherein the indication is indicative of the completion of the cutting. The method may include operating a sealing mechanism to seal the web plies to each other to trap the foam precursor therebetween to form the filled bag, wherein the indication is indicative of the cutting operation being sufficiently completed to allow a separation of the bags without pulling the film through the sealing mechanism and ruining the seal on the formed bag or on a subsequent bag. The method may include operating a sealing mechanism to seal the web plies to each other to trap the foam precursor therebetween to form a filled bag, wherein the indication is indicative of the sealing operation being sufficiently completed to allow a separation of the bags without ruining the seal on the formed bag or a subsequent bag. The indication may be further indicative of the cutting operation being sufficiently completed to allow a separation of the bags without pulling the film through the sealing mechanism and ruining the seal. 
         [0012]    The method may further include providing a controller that is operably connected to the indicator and the dispensing apparatus and sending a signal from the controller to the indicator to generate the indication depending on the readiness of the bag for removal. The controller may send the signal when the bag is ready to be removed. The controller may send the signal when the bag is not yet ready to be removed. 
         [0013]    While multiple embodiments are disclosed, still other embodiments in accordance with the present disclosure will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments. As will be realized, the disclosed embodiments are capable of modifications in various aspects, all without departing from the spirit and scope of thereof. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive. 
     
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         [0014]    While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter that is regarded as forming the various embodiments of the present disclosure, it is believed that the embodiments will be better understood from the accompanying figures, in which: 
           [0015]      FIG. 1  illustrates an embodiment of the dispensing system of the present disclosure; 
           [0016]      FIGS. 2 and 3  illustrate a rear and front view, respectively of a dispenser system of the dispensing system as in  FIG. 1 ; 
           [0017]      FIG. 4  illustrates a base and extendable support assembly of the dispenser system; 
           [0018]      FIGS. 5-8  illustrate front perspective views of a bag forming assembly of the dispenser system of the present disclosure; 
           [0019]      FIG. 9  illustrates a front perspective view of dispenser apparatus of the bag forming assembly; 
           [0020]      FIG. 10  illustrates a portion of a film travel path through the dispenser apparatus in accordance with the present disclosure; 
           [0021]      FIG. 11  illustrates a view of an inline pump assembly and hose manager in accordance with the present disclosure; 
           [0022]      FIGS. 12   a  and  12   b  illustrate one embodiment of a bag-ready indicator in accordance with the present disclosure; and 
           [0023]      FIGS. 13   a  and  13   b  illustrate the bag-ready indicator of  FIGS. 12   a  and  12   b  as mounted on a panel display of the dispenser system; and 
           [0024]      FIG. 14  illustrates a block diagram of a control system including a controller for use with the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0025]    With general reference to  FIGS. 1-4 , the present disclosure is directed to a dispensing system and components therefore. In particular, the present disclosure a foam-in-bag dispensing apparatus  20  used to produce foam-filled bags, and components having application in the foam-in-bag apparatus. Specific aspects of the apparatus  20  are discussed as follows. 
         [0026]      FIG. 1  illustrates a preferred embodiment of the dispensing system  20  of the present disclosure, which includes dispenser system  22  in communication with the chemical supply system  23 , itself including chemical supply container  24  (supplying chemical component A) and chemical supply container  26  (supplying chemical component B). Chemical hoses  28  (chemical A) and  30  (chemical B), in connection with tubes  31   a,    31   b  (extending into the containers  24 , 26 ), provide fluid communication between respective chemical supply containers  24 ,  26  and in-line pumps  32   a,    32   b  mounted on dispenser system  22  (see  FIG. 11 ). Dispenser system  22  can include in-line pumps  32   a,    32   b  that is in communication with chemical supply containers that are either in proximity (for example, 40 feet or less) to the dispenser system  22  or remote (for example, greater than 40 feet) from where the dispenser system  22  is located. This allows the containers to be situated in a more convenient or less busy area of a plant or other facility wherein the dispensing apparatus  20  is employed, as it is often not practical to store chemicals in close proximity to the dispenser system  22 . (for example, 100 to 500 feet separation of dispenser system  22  and chemicals  24 ,  26  may be desirable in some applications). Thus, it is inherent in the present disclosure that a great deal of versatility as to how the dispenser system is to be set up relative to the chemical source is possible. As a number of installations require that the containers be stored hundreds of feet (for example, 100 to 500 feet or more) away from the system. In another embodiment, where the distance between the containers  24 ,  26  is shorter, e.g., about 20 feet to about 40 feet, tubes  31   a,    31   b  may be replaced by pumps in containers  24 ,  26 . The pumps  32   a,    32   b  feed chemicals A and B to the system  22  via hoses  28 ,  30 . It will be appreciated that in any embodiment, the chemicals A and B may be fed to the system  22  at its base, at the head, or at any other position of the system  22 . The present disclosure is designed to accommodate these long, or short, length installation requirements, as may be present in any particular application. 
         [0027]      FIGS. 2 and 3  provide rear and front elevational views, respectively, of dispenser system  22  which includes exterior housing  38  supported on telescoping support assembly  40 , which in a preferred embodiment includes a lifter (for example, an electric motor driven gear and rack system with inner and outer telescoping sleeves or a screw mechanism) and is mounted on base  42  (for example, a roller platform base to provide some degree of mobility). Further mounted on base  42  is solvent pump system  32   c  (shown covered) configured to deliver a solvent cleaning solution from a solvent tank, through the assembly  40 , and into the chemical dispenser apparatus (discussed in greater detail below) where such solvent is used to clean the tip of the mixing module (also discussed in greater detail below). Film roll reception assembly  56  preferably extends out from support assembly  48 .  FIG. 3  further provides a view of first and second control panels  61 ,  63 . 
         [0028]      FIG. 4  illustrates base  42  and lifter or extendable support assembly  48  (e.g., preferably a hydraulic (air pressure) or gear/rack combination or some other telescoping or slide lift arrangement or a screw mechanism) extending up from base  42 .  FIG. 4  also illustrates the mobile nature of base  42  which is a wheeled assembly (wheels  7 ). Further shown are the connection assembly  6 , including a solvent line  6   a  and electrical connectors  6   b.    
         [0029]      FIGS. 5-8  generally show aspects of a foam-in-bag assembly or “bagger assembly” of the present embodiment. The assembly includes frame sections  71 ,  73  which form a unitary flip door frame, and may be made of extruded aluminum. A rod  70  is fixed to the flip door frame sections  71 ,  73  and pivots in a hole in plate  66 . Driver roller shaft  72 , supporting left and right driven or follower nip rollers  74 ,  76 . While in a latched state, the upper ends of frame sections  71 ,  73  are also supported (locked in closed position) by door latch rod  85  with handle latch  87 . 
         [0030]    Drive shaft  82  supports drive nip rollers  84 ,  86 . Driven roller shaft  72  and driver roller shaft  82  are in parallel relationship and spaced apart so as to place the driven nip rollers  74 ,  76 , and drive nip rollers  84 ,  86  in a film drive relationship with a preferred embodiment featuring a motor driven drive roller set  84 ,  86 , driven by motor  80   a,  formed of a compressible, high friction material such as an elastomeric material (for example, a synthetic rubber) and the opposite, driven roller  74 ,  76  is preferably formed of a knurled aluminum nip roller set (although alternate arrangement are also featured as in both sets being formed of a compressible material like rubber). In some embodiments, shaft  72  and rollers  74 ,  76  may be of unitary construction, 
         [0031]    Drive nip rollers  84 ,  86  have slots formed for receiving film wrapping preventing means  90  (for example, canes  90 ). For example, canes  90  may be employed to prevent the film web from wrapping around the nip rollers  84 ,  86 .  FIG. 7  further illustrates bag film edge sealer  169  shown received within a slot  91  in roller  76  and positioned to provide edge sealing to a preferred C-fold film supply. Support portions  94  and  96  extend upward from the nip roller contact location. Support portion  94  supports the dispenser apparatus  92 . Support portion  96  includes an upper portion  98  that includes a means for receiving an end of upper idler roller  101 . The other end of the idler roller  101  is supported by support portion  100 . 
         [0032]    Idler roller  101  can preferably be adjusted to accommodate any roller assembly position deviation that can lead to non-proper tracking and also can be used to avoid wrinkled or non-smooth bag film contact. Also, idler roller  101  is preferably a steel or metal roller and not a plastic roller to avoid static charge build up relative to the preferred plastic film supplied. Idler roller is also preferably of the type having roller bearings positioned at its ends (not shown) for smooth performance and smooth, unwrinkled film feed. 
         [0033]    Also,  FIGS. 5-8  show first (preferably being releasably lockable in an operative position) end or cross-cut/seal support block or cut/seal jaw  116  positioned forward of a vertical plane passing through the nip roller contact location and below the axis of rotation of drive shaft  82 . End cut/seal jaw  116 , which preferably is operationally fixed in position, in this embodiment has extruded aluminum construction (and is part of the flip door frame) of a sufficiently high strength so that it is not easily deformed over an extended length, and that is of sufficient heat resistance to withstand heat from the heated sealing and cutting elements (for example, a steel block with a zinc and/or chrome exterior plating), and preferably extends between left and right frame structures  66 , and  68 , but again, like driven shaft  72  and rollers  74 ,  76 . The cut/seal jaw  116  is preferably supported on pivot frame sections  71 ,  73  and extends parallel with driven shaft  72 . In some embodiments, the cut/seal jaw  116  may be of unitary construction with the sections  71 ,  73 .  FIG. 5  illustrates block  116  rigidly fixed at its ends to the opposing, interior sides of pivot frame sections  71 , and  73  for movement therewith when latch (handle  87  of the latch is shown) is released. The sealing jaw  116  includes an actuator  161 . Cut seal jaw operates with complementary jaw  116   b,  driven by motor  158  along track  117 , to hold the film web in place during operation. In one embodiment, a crank is employed to drive the jaw  116   b.  In other embodiments, a solenoid or other means may be employed. Further disclosed is a vent cutter  162  for venting the bags, cutting wire  163  for cutting the bags, sealing wires  164   a  and  164   b,  and longitudinal sealing wires  169 . The cutting and sealing wires are heated, with the heat transmitted by the cutting wire  163  to the film being greater than that of the sealing wires  163   a,    163   b.  A PTFE (Teflon) film  166  can be used over the sealing wires  163   a  decrease the heat transmitted to the film compared to from the cutting wire  163 . 
         [0034]    Referring to  FIG. 9 , dispenser apparatus  192  includes a housing  194 , motor  80   b,  and manifold  193 . Dispenser apparatus  192  functions to dispense the foam precursor(s), such as chemicals A and B, between plies of a film web  216 , and the plies are sealed together and cut to form a bag. In this manner, the dispenser apparatus  192  serves to form the foam-in-bag products as described herein. Shutoff valves  168   a,    168   b,  for chemicals A and B, respectively, are shown in  FIG. 7 . A dispenser outlet preferably is also positioned above and centrally axially situated between first and second side frame structures  66 ,  68 . With this positioning, dispensing of material (chemicals A and B) can be carried out in the clearance space defined axially between the two respective nip roller sets  74 ,  76  and  84 ,  86 . Dispenser assembly  192  is preferably supported a short distance above (for example, a separation distance of about 1 to 5 inches and preferably about 2 to 3 inches) the nip contact location or the underlying (preferably horizontal) plane on which both rotation axes of shafts  72 ,  82  fall. This arrangement allows for receipt of chemical in the bag-being formed in direct fashion and with a lessening of spray or spillage due to a higher clearance relationship as in the prior art. Mixing module  198  mixes chemicals A and B prior to insertion into the web  216 , and includes a valve stem  198   a  actuated by actuator  195 , which itself is driven by shaft  199  and motor  80   b.  Solvent is delivered to the mixing module using solvent line  6   a  and manifold  6   c  (shown in  FIG. 8 ). Manifold  6   c  is provided for a check valve that functions to produce sufficient back pressure in the solvent hose. The mixing module is secured by an attachment means  190  (shown in  FIG. 8 ), which may include one or more screws and pins. The pins also serve to accurately position the mixing module  198  with respect to the actuator  195 . 
         [0035]      FIGS. 8 and 10  provides a side elevational view of dispenser system  192  and jaw assembly  202 , including jaws  116  and  116   b,  in relationship to film  216  which in a preferred embodiment is a C-fold film featuring a common fold edge and two free edges at the opposite end of the two fold panel. The jaw assembly is configured for driving  116   b  against  116  with sufficient force to pinch the two film plies to performs the sealing and cutting and to keep the precursors from leaking past the jaws before the sealing is complete. While a C-fold film is a preferred film choice, a variety of other film types of film or bag material sources are suitable for use of the present invention including gusseted and non-gusseted film, tubular film (preferably with an upstream slit formation means (not shown) for passage past the dispenser) or two separate or independent film sources (in which case an opposite film roll and film path is added together with an added side edge sealer) or a single film roll comprised of two layers with opposite free edges in a stacked and rolled relationship (also requiring a two side edge seal not needed with the preferred C-fold film usage wherein only the non-fold film edging needs to be edge sealed). For example, in a preferred embodiment, in addition to the single fold C-fold film, with planar front and back surfaces, a larger volume bag is provided with the same left to right edge film travel width (for example, 12 inch or 19 inch) and features a gusseted film such as one having a common fold edge and a V-fold provided at that fold end and on the other, interior side, free edges for both the front and rear film sheets sharing the common fold line. The interior edges each have a V-fold that is preferably less than a third of the overall width of the sheet. 
         [0036]    As further shown in  FIG. 10  after leaving the film roll and traveling past the lower idler roller, the film is wrapped around upper idler roller  101  and exits at a position where it is shown to have a vertical film departure tangent vertically aligned with the nip contact edge of the nip roller sets. Because of the C-fold arrangement, the folded edge is free to travel outward of the cantilever supported dispenser system  192 . That is, depending upon film width desired, the folded end of C-fold film  216  travels vertically down to the left side of dispenser end section  196  for driving nip engagement with the contacting, left set of nip rollers. The opposite end of film  216  with free edges travels along the smooth surface of dispenser housing whereupon the free edges are brought together for driving engagement relative to contacting right nip roller set ( 76 ,  84 ) for the bag being formed. 
         [0037]    Referring to  FIG. 11 , an inline pump assembly can be used that includes a pump  32   a  for the feed line of chemical A  28 , and a pump  32   b  for the feed line of chemical B  30 . As shown, inline pumps  32   a ,  32   b  can, in some embodiments, be housed within and mounted to a hose manager  49 , which helps the telescoping column  48  to operate without interfering with the chemical lines  28 ,  30 , and solvent line  6 . The hose manager  49  can be mounted to the head of the device or to the upper telescoping portion to move with the head as it is raised or lowered, or alternatively can be mounted to the base of the device or another suitable location. 
         [0038]    In operation, a film web  216  is fed to the apparatus  22 . Cut/seal jaw  116  and complementary jaw  116   b  close to hold the film in place as cutting and sealing occurs. Venting holes are cut by vent cutter  162 , and chemicals A and B are dispensed between the plies of the film. The jaw  116   b  is moved to opened, and the film  216  advances by operation of motor  80   a  and the nip rollers. The filled bag may be removed prior to or after opening of the jaw. 
         [0039]    Some additional examples of these foam-in-bag fabrication devices can be seen in U.S. Pat. Nos. 5,376,219; 4,854,109; 4,938,007; 5,139,151; 5,575,435; 5,679,208; and 5,727,370. A further example of a foam-in-bag device is shown in U.S. Pat. No. 7,735,685, the contents of which are herein incorporated by reference in their entirety. Furthermore, an example of a vent cutting device is disclosed in U.S. Pat. No. 7,367,171, the contents of which are herein incorporated by reference in their entirety. The disclosure herein can, in the alternative, be used with any of the foam-in-bag systems discussed above. 
         [0040]    With respect to any of the embodiments above, as shown in  FIG. 14 , a controller  1000  may be included and configured to control output to the display panels  61 ,  63 , the cutter  166 , the sealer  164 , the chemical dispenser  192 , or a solvent dispenser  189 . Input to the controller  1000  may be from the control panels  61 ,  63 , or from one or more inputs  1001 ,  1002 , etc. as will be discussed in greater detail below. Controller  1000  may include, but is not limited to, a computer/processor that can include, e.g., one or more microprocessors, and use instructions stored on a computer-accessible medium (e.g., RAM, ROM, hard drive, or other storage device). 
         [0041]    The controller  1000  may also include a computer-accessible medium (e.g., as described herein above, a storage device such as a hard disk, floppy disk, memory stick, CD-ROM, RAM, ROM, etc., or a collection thereof) can be provided (e.g., in communication with a processing arrangement). The computer-accessible medium can contain executable instructions thereon. In addition or alternatively, a storage arrangement can be provided separately from the computer-accessible medium, which can provide the instructions to the processing arrangement so as to configure the processing arrangement to execute certain exemplary procedures, processes and methods, as described herein above, for example. 
         [0042]    Further, the exemplary processing arrangement can be provided with or include an input/output arrangement, which can include, e.g., a wired network, a wireless network, the internet, an intranet, a data collection probe, a sensor, etc. The exemplary processing arrangement can be in communication with an exemplary display arrangement  61 ,  63 , which, according to certain exemplary embodiments of the present disclosure, can be a touch-screen configured for inputting information to the processing arrangement in addition to outputting information from the processing arrangement, for example. Further, the exemplary display  61 ,  63  and/or a storage arrangement can be used to display and/or store data in a user-accessible format and/or user-readable format. 
         [0043]    In one embodiment, the dispenser system  22  of the present disclosure may be provided with one or more indicators to communicate to the user whether the bag that has been filled with the foam precursors is ready to be removed from the device. Preferably, a bag-status indicator can be used to alert or otherwise notify the operator of the dispenser system  22  that a bag is ready to be removed from the dispenser, thus effectively helping to prevent the bag from inadvertently being removed too early. 
         [0044]    The bag-status indicator may generally be provided in any manner sufficient to attract the attention of the operator, and may include, for example, an audible indicator, such as a beep or a chime, a visual indicator, such as a steady light, a flashing light, or a panel display, or a tactile indicator, such as a vibration means that the operator can feel. Other status indicators can display another characteristic or parameter relating to the bag preparation, that would indicate to the operator whether the bag is ready for removal, such as a time counted from when the sealing step has begun, the temperature of the film, or another metric that is useful for determining whether the bag sealing and cutting is complete. 
         [0045]    Embodiments with bag-status indicators that are configured as bag-ready/not-ready indicators can communicate to the user whether the bag is ready for removal in several manners. For example, the indicator can be configured for indicating when the bag is not yet ready, or to indicate when the bag is ready. Alternatively, several indication modes may be provided by the indicator, such as one indication when the bag is not ready, and another when the bag is ready. 
         [0046]    In a preferred embodiment, the bag-status indicator is provided as a visual indicator. Generally, such visual bag-ready indicator may be positioned anywhere on the dispenser system  22  that is visible to the operator. In a preferred embodiment, the visual bag-status indicator may be positioned on one or more of the control panels  61 ,  63 , with reference to  FIG. 2 . In one embodiment, the bag-status indicator includes a steady light of any suitable color, in some embodiments a color that is distinct from other colors or display lights on in its vicinity. In another embodiment, the bag-status indicator is an intermittent light, or can have an intermittent mode and a stead mode to indicate whether the bag is not yet ready or is ready. In other embodiments, different colors can be used to indicate a not-ready or a ready state. 
         [0047]    As discussed above, the bag-status indicator should provide its indication that a bag is ready upon the completion of a bag filling, sealing, and cutting cycle, thus effectively preventing the bag from being removed too early. As such, the bag-status indicator may be operatively connected with the cutting and sealing means of the dispenser system  22 , for example, cutter jaw  118  and bag film edge sealer  91  as shown in  FIGS. 5 ,  7 . As discussed above with regard to  FIG. 14 , the controller  1000  may provide such connection via inputs  1001 ,  1002 , respectively. In certain embodiments, the jaws continue to hold the bag, pinched therebetween, even once the cutting operation is complete, so it may not otherwise n\be obvious when the sealing and cutting is complete. Such operative connection may include an electrical connection with a sensor that indicates when the cutting and sealing means have finished their operation. In this respect, the disclosure is not limited to any particular connection or sensor to provide a signal to the bag-ready indicator that a bag is ready to be removed. 
         [0048]    With reference now to  FIGS. 12   a  and  12   b , one embodiment of a suitable bag-ready indicator is disclosed. The bag-ready indicator  300  shown therein is a visual indicator including a light  301 , one or more wires  303  (which may be covered by a protective cover  302 ) to provide electrical power to the light  301 , an electrical connector  304  to connect the wires  303  to the rest of the dispenser system  22 , and a latching means  305  to hold the connector  304  securely in place. In operation, an electrical signal is sent, from a sensor at one or more of the bag cutting and sealing means (as described above) at the appropriate time, to the electrical connector  304 , at which point such signal passes through the wires  303  to illuminate the light  301  of the bag-ready indicator  300 . 
         [0049]    With reference now to  FIGS. 13   a  and  13   b , the bag-ready indicator  300  is shown as it would be mounted, in one embodiment, to the first control panel  61  ( FIG. 13   b  showing a front side thereof,  FIG. 13   a  showing a rear side thereof). On the front side, as shown in  FIG. 13   b , the light  301  is visible from the exterior side of panel  61 . On the rear side, the mounting means for the indicator  300  to the panel  61  is shown. In one embodiment, mounting includes a mounting plate  310  affixed by screws  311  to the rear side of the panel  61  through a cylindrical post  312  including complementary threads on the inner circumference thereof. The light  301  may be received through a circular aperture of the panel  61 , thereby allowing it to protrude to the front side thereof as shown in  FIG. 13   b.    
         [0050]    In operation of this embodiment, once a bag is ready to be removed, the light  301  will illuminate (either continuously or intermittently), thereby notifying the operator that the bag is ready to be removed. With its preferred positioning on the control panel  61 , the light will be easily visible to the operator, thereby increasing the likelihood that the operator will notice it, and remove the bag in a timely manner. 
         [0051]    The terms “substantially” or “generally” as used herein to refer to a shape is intended to include variations from the true shape that do not affect the overall function of the device. The term “about,” as used herein, should generally be understood to refer to both numbers in a range of numerals. Moreover, all numerical ranges herein should be understood to include each whole integer within the range. The terms “front,” “back,” “upper,” “lower,” “side” and/or other terms indicative of direction are used herein for convenience and to depict relational positions and/or directions between the parts of the embodiments. It will be appreciated that certain embodiments, or portions thereof, can also be oriented in other positions. 
         [0052]    While illustrative embodiments are disclosed herein, it will be appreciated that numerous modifications and other embodiments can be devised by those of ordinary skill in the art. Features of the embodiments described herein can be combined, separated, interchanged, and/or rearranged to generate other embodiments. Therefore, it will be understood that the appended claims are intended to cover all such modifications and embodiments that come within the spirit and scope of the present disclosure.