Patent Grant
9771174
The present invention relates generally to a system for precisely transferring a pouch from a pouch delivery device into a fill-seal machine and, more particularly, to a system having a robotic transfer device capable of determining the pouch dimensions and precisely load the pouch into grippers a predetermined height from the upper edge of the pouch.
Automated manufacturing processes incorporating a high speed fill-seal machine typically involves transferring a container into the machine. The container may be a disposable portable container for storing a product such as a preformed flexible pouch or tray. The preformed pouch is loaded into the fill-seal machine to complete the steps of filling and sealing the pouch prior to its exit from the high speed machine where it is typically packaged in bulk for transit.
As the preformed pouches include numerous different shapes and sizes, a pouch must be positioned in a specific manner so that the pouches are correctly loaded into the fill-seal machine. Specifically, it is of vital importance that the pouch is positioned within the grippers of the fill-seal machine at a specific height. The positioning of the pouch is of importance as the distance between the upper edge of the pouch and the grippers affects the width of the seal and the types of seals capable of being performed on the pouch. If the pouch is positioned within the grippers with too much distance between the upper edge and the grippers, the width of the seal may be excessive and/or leave a portion of the pouch adjacent the upper edge unsealed which later has to be trimmed prior to packaging. In contrast, if the distance between the upper edge of the pouch and the grippers is too small, the width of the seal may be ineffective for properly sealing the pouch.
In order to keep pace with the high speed machine, a robotic transfer device is used to load the preformed pouches into the fill-seal machine. However, these robotic transfer devices must be precisely taught the pouch specifications including pouch size and the preferred distance between the upper edge of the pouch and the gripper member. The robotic transfer device teaching is time consuming as the high speed fill-seal machine must be shut down, resulting in a loss of productivity. A human operator must then enter the specifications of the pouch into the robotic transfer device prior to the high speed fill-seal machine being restarted.
In addition, the high speed fill-seal machine often includes adjustable grippers capable of adjusting the width between each gripper arm and thereby providing a versatile machine capable of filling and sealing a variety of differently sized pouches. Typically, the previously known gripper adjustment required the fill-seal machine to be shut down and the width of the grippers to be manually adjusted prior to the restarting of the fill-seal machine. As such, the additional downtime results in a loss of productivity and increases in labor costs.
Once properly positioned within the grippers, the pouch is moved through the various stations of the fill-seal machine. In order for the pouch to be filled, the pouch must first be opened and kept opened during the filling process. Previously known, openers included grippers which translated inwards forcing the side edges of the pouch together and/or suction cups which attached to the front and back of the pouch and translated outward to open the pouch. However, these previously known types of openers often do not fully open the pouch which prevents a diving funnel from entering the pouch. Further, previously known diving funnels include a rigid design which often damages the contents as they are loaded into the pouch. The rigid design of the diving funnels also resulted in jams as contents blocked the exit of the funnel.
Thus, there exists a need for a smart system for continuously and precisely positioning the preformed pouches within the grippers of the fill-seal machine, automatically adjusting the gripper width, and opener which allows a diving funnel to properly fill the pouches in the fill-seal machine.
The present invention provides an improved system, method, and machine for continuous loading of a pouch into a high speed fill-seal machine which overcomes the above-mentioned disadvantages of the previously known transfer and teaching techniques.
In brief, a load smart system for continuously loading preformed pouches into a fill-seal machine is provided. A plurality of pouches are disposed within a pouch delivery device, each of the pouches having an upper edge and an orientation indicia. The fill-seal machine includes a rotating turret having a plurality of radially extending gripper pairs. The rotating turret rotates the plurality of gripper pairs between a loading station, an opening station, a filling station, a sealing station, and an unloading station. A robotic transfer device is positioned between the pouch delivery device and the loading station of the fill-seal machine. The robotic transfer device includes a gripper member and an optical sensor. During operation, the optical sensor scans the indicia to determine the pouch characteristics and the gripper member aligns the pouch in a predetermined orientation and deposits the pouch within the gripper pairs at the loading station a predetermined distance from the upper edge of the pouch.
The system includes a control station having a computer processing unit in communication with a database having a plurality of preloaded pouch characteristics correlating to the pouch indicia. Upon scanning of the indicia by the optical sensor, the computer processing unit accesses the database to determine the size, orientation, and predetermined distance between the upper edge of the pouch and the gripper members so as to control the robotic transfer device to correctly pick up the pouch, orient the pouch, and precisely deposit the pouch within the gripper pairs of the loading station at a predetermined distance from the upper edge of the pouch.
The system further includes an automated gripper with adjustment mechanism in communication with the control station to automatically adjust the width of the grippers. An advantage of the automated gripper adjustment mechanism is that an operator can enter a pouch width into an input/output display device attached to the control station and the mechanism will precisely adjust the gripper width.
A better understanding of the present invention will be had upon reference to the following detailed description when read in conjunction with the accompanying drawings, wherein like reference characters refer to like parts throughout the several views, and in which:
The present invention has utility as a load smart system for precisely loading preformed pouches into a fill-seal machine. By providing an indicia on the pouch which is scanned by the optical sensor on the gripper member of the robotic transfer device to provide the robotic transfer device with pouch characteristics, eliminates the need for an operator to manually enter the pouch into the grippers of the fill-seal machine. Further, the system is advantageous in that the width of the grippers on the fill-seal machine can be automatically adjusted through the control station rather than manually manipulated. In addition, a reciprocating opening device enters the pouch at the opening station and travels with the pouch from the opening station to the loading station where a flexible diving funnel enters the pouch between the opening fingers of the reciprocating opening device. After filling, the reciprocating opening device returns to the opening station.
With reference to
Referring to
The pouch 18 is optionally formed from a single sheet of material which is manipulated so that the side edges 22 are joined together to form a seam between the front wall 20 and the back wall. In the alternative the pouch 18 is formed from two sheets of material defining the front wall 20 and the back wall which are joined by sealing the side edges 22 of the two facing sheets of material. The shape of the pouch 18 is defined by its intended use, intended contents, or to define an aesthetically pleasing appearance such as a shaped pouch having linear or curvilinear edges. It is appreciated, of course, that these examples are merely illustrative of pouch shapes and other pouches may be utilized.
As seen in
The pouch 18 includes an opener 30 for easily accessing the contents or dispensing the contents from the pouch 18. Various types of openers 30 are optionally incorporated into the pouch 18 prior to the filling of the pouch 18, or in the alternative the opener 30 is added to the pouch 18 by the fill-seal machine 16. The various types of openers 30 illustratively include an integrally formed tear notch having a tear line which defines a tear-off portion, a resealable zipper which provides a hermetic seal through the use of interlocking teeth such as a press-to-close or a slide zipper, a weakened straw-pierceable portion in the pouch for receiving a straw, and a pull tab covering an opening in the pouch.
In addition, the pouch 18 optionally includes a fitment 32 such as a removable and replaceable cap secured to a spout mounted between the front wall 20 and the back wall of the pouch 18, as seen in
An indicia 34, in the form of a readable barcode, universal product code (UPC), two-dimensional data matrix, or a radio frequency identification (RFID) tag is visibly positioned on the pouch 18. The indicia 34 is disposed 34 on the exterior of the pouch 18, such as the front wall 20, the back wall, or the gusset 28. The indicia 34 is specific to each pouch 18 having a different shape, size, and/or product to be contained.
The above-described features are merely illustrative and the preformed flexible pouch 18 may incorporate any of the above-described features or any other feature in any combination. In addition, the finished pouch 18 may assume various shapes such as cylindrical, cubical, spherical, conical, an hourglass, or the like as defined by the intended contents and usage of the pouch 18.
The preformed flexible pouches 18 are stored in pouch delivery device 12 prior to loading into the fill-seal machine 16. As seen in
Another example of a pouch delivery device 12 is shown at
The pusher member 44 is longitudinally movable through the magazine 40 upon rotation of the rotatable base 42 thereby providing the topmost pouch 18 in the magazine 40 at a consistent height for the robotic transfer device 14. The magazine 40 optionally includes a level sensor 54, such as a proximity sensor, capable of detecting the level of the pouches 18 within the magazine 40. The magazine 40 includes a controller (not shown) operatively in communication with an actuator and the level sensor 54 that uses the information from the level sensor 54 to cause the rotatable base 42 to rotate thereby extending the pusher member 44 through the aperture 52 of the base wall 50 of the magazine 40 raising the plate 46 to maintain a consistent level of pouches 18 within the magazine 40.
Another example of a pouch delivery device is disclosed in
In instances where the pouch 18 includes a fitment 32 or other feature attached to either the front wall 20 or the back wall and extends beyond the exterior of the pouch 18, the pouches 18 are optionally stacked in an alternating manner such that the first pouch is stacked with the back wall facing the pouch delivery device 12. The second pouch 18 is stacked with the front wall 20 facing the front wall 20 of the first pouch such that the fitments 32 share the space between the front wall 20 of the second pouch and the front wall 20 of the first pouch. The alternating stacking of the pouches 18 allows a plurality of pouches 18 to be stacked in a more compact manner.
It is appreciated, of course, that that a plurality of magazines 40 with or without rotating bases 42 or a plurality of containers 56 are placed on the turntable 36 in placement of the pouch holders 38. It is also appreciated that the pouch holders 38, the magazine 40, and the container 56 have a shape which is selected to correspond to the shape of the pouches 18 contained therein. The pouch delivery device 12 optionally includes an intermediate wall which divides the pouch holders 38, magazines 40, and containers 56 into sections allowing a plurality of stacks of pouches 18 to be stored therein. The pouch delivery device is optionally in the form of a conveyor belt having an unloading end adjacent the robotic transfer device.
In the alternative, a generally U-shaped chute 58 is used as a pouch delivery device 12 for pouches 18 having fitments 32 on the lower edge 26, as seen in
Referring to
A first arm 68 is attached to the second base portion 66 at a proximate end and is connected to a joint 70 at a distal end. The first arm 68 is movable relative to the second base portion 66 and the joint 70 is rotatable about the first arm 68. A second arm 72 is rotatably attached to the joint 70. A boom 74 having a first end 76 and an opposite second end 78 is attached to the second arm 72. The boom 74 is formed of an elongated cylindrical rod movable in the longitudinal direction relative to the second arm 72 in order to vary the distance between the second end 78 and the second arm 72.
A swivel plate 80 is rotatably attached to the second end 78 of the boom 74. A gripper member 82 is attached to the swivel plate 80 for picking up the pouches 18 from the pouch delivery device 12. An optical sensor 84 is positioned on the swivel plate 80 in order to sense the indicia 34 positioned on the pouch 18. The optical sensor 84 includes a bar code reader for reading the indicia 34 in the form of a bar code or two dimensional data matrix, an image capture device, or a radio frequency identification code reader to receive information from the indicia 34 in the form of a RFID tag.
Various types of gripper members 82 are available and depend upon the type of pouch 18 to be picked up. The gripper members 82 illustratively include but are not limited to vacuum assisted suction cups, a mechanical gripper, an adhesive, or any combination thereof.
The configuration of the robotic transfer device 14 allows its articulation through various three-dimensional movements in order to properly pick up the pouch 18 from the pouch delivery device 12 at a pickup position and deposit the pouch 18 into a loading station, described in greater detail below, of the fill-seal machine 16 at a load position. In the alternative, the robotic transfer device 14 is in the form of a pick and place mechanism which picks up the pouches 18 from a pouch delivery device 12 in the form of a conveyor belt and places the pouches 18 within the grippers 94.
The movement of the robotic transfer device 14 is performed by any articulation means known in the art illustratively including hydraulics, electronically controlled servos, or any combination thereof, operated under control of a control station 86 in communication with the robotic transfer device 14. The control station includes a controller 88 in the form of a computer processing unit, a database 90, and a display/input device 92. The robotic transfer device 14 via computer control by the control station 86 operates under the sequential movements based on the XYZ coordinates stored in the database 90 to position the gripper member 82 at the pickup position in order to pick up a pouch 18 from the pouch delivery device 12 and articulate the robotic transfer device 14 through the sequential movements to deposit the pouch 18 in the loading station of the fill-seal machine 16 at a loading position.
As seen in
In order to determine the proper sequential movement for articulating the robotic transfer device 14 from the pickup position to the load position, the optical sensor 84 scans the indicia 34 on the pouch 18 and transmits the information to the control station 86. The controller 88 accesses the database 90 to correlate the scanned information with one of the preloaded pouch characteristics to determine the proper sequential movements. As the load smart system 10 is operable to process a variety of different pouch types and sizes, the pouch characteristics stored on the database 90 include various pouch information such as the proper sequential movements based on the XYZ coordinates to articulate the robotic transfer device 14 from the pickup position to the load position, particularly the proper distance between the upper edge 24 of the pouch 18 and the grippers 94 as pouches 18 of different sizes require a difference distance D as seen in
In operation, the robotic transfer device 14 will position the gripper member 82 in a pre-pickup position in order for the optical sensor 84 to scan the indicia 34 on the pouch 18 disposed within the pouch delivery device 12. In the pre-pickup position, the swivel plate 80 is positioned such that the optical sensor 84 is in a position above the pouch delivery device 12 (either the pouch holders 38, magazines 40, or containers 56) to allow the optical sensor 84 to read the indicia 34 on the pouch 18. The read indicia 34 is then transmitted to the control station 86 wherein the controller 88 accesses the database 90 in order to determine the corresponding preloaded pouch characteristics including the sequential movements of the robotic transfer device 14 including the predetermined distance D between the upper edge 24 of the pouch 18 and the grippers 94. As stated above, in some instances when the pouch 18 is positioned in an alternating manner within the pouch delivery device 12, the preloaded pouch characteristics will include a plurality of sequential movements allowing the robotic transfer device 14 to properly pick up each alternating pouch 18 and perform the sequential movements to articulate the gripper member 82 in a proper position to load the pouch 18 into the grippers 94 at the load position.
The optical sensor 84 is optionally a bar code reader which utilizes a scanner to read the indicia 34 in the form of a bar code or two dimensional data matrix, or a RFID reader which reads the indicia 34 in the form of a RFID tag. The optical sensor 84 optionally includes a camera which captures an image of the pouch 18 in the pouch delivery device 12 from the pre-pickup position and compares the captured image with a preloaded image stored in the database 90 with the preloaded pouch characteristics in order to determine that the pouch 18 is in the correct position to perform the sequential movements. An example of this includes pouches 18 stacked in an alternating manner wherein upon reading the indicia 34 the pouch characteristics state that the pouches are stacked in an alternating manner and includes a preloaded image of each pouch which corresponds to the sequential movements such that the captured image is compared to the preloaded image to confirm that the sequential movements are correct for the position of the pouch 18.
With reference to
The fill-seal machine 16 includes a rotating turret 112 which rotates a plurality of grippers 94 through each of the stations from the loading station 96 to the unloading station 110 wherein the pouch 18 is opened, filled, and sealed prior to exiting. During operation the pouch 18 is loaded into the fill-seal machine 16 at the loading station 96. The pouch 18 is then rotated to the first feature station 98 where a feature is added to the pouch 18. Next, the pouch 18 is rotated to the second feature station 100 where an additional feature is added, or in the alternative the feature applied at the first feature station 98 is finished. The pouch 18 is then rotated to the opening station 102 where the pouch 18 is opened using a pouch opener 334. An example of such a pouch opener 334 is disclosed in commonly assigned U.S. Pat. No. 7,584,593 entitled ‘Method and Apparatus for Opening a Flexible Pouch Using Opening Fingers’ issued on Sep. 8, 2009, which is hereby incorporated by reference.
In the alternative, the first feature station 98 is a first opening station where openers in the form of suction cups attached to the front wall 20 and the back wall and pull apart to open the pouch 18. In addition, the second feature station 100, is a second opening station where a diving rod enters the open upper edge 24 of the pouch 18 and extends towards the lower edge 26 and expands to fully open the area adjacent the lower edge 26 of the pouch 18.
Once the pouch 18 has been opened, a reciprocating opening device 219, described in greater detail below, enters the pouch 18 at the opening station 102 and rotates with the pouch 18 to the filling station 104 holding the pouch 18 open during travel. At the filling station 104 a diving funnel 336 enters the opened pouch 18 between opened fingers 224 of the reciprocating opening device 219. After filling, the pouch 18 rotates to the gas removal station 106 where oxygen inside the pouch 18 is replaced with an inert gas such as nitrogen or carbon dioxide. The gas removal station 106 is optionally a vacuum station or a dust extraction station. The pouch 18 then rotates to the sealing station 106 where the open end (upper edge 24) of the pouch 18 is sealed using heat, ultrasonics, adhesive or any combination thereof. Finally, the pouch 18 is rotated to the unloading station 110 where the pouch 18 exits the fill-seal machine 16 by conveyer 111.
With reference to
A second hollow shaft 130 is positioned around the first hollow shaft 118 and includes a first end 132 disposed above the gear 120 and a second end 134 disposed below the gripper deck 128. Ball bearings 136 are positioned adjacent the first end 132 of the second hollow shaft 130 and oil seals 138 are positioned adjacent the second end 134 of the second hollow shaft 130 to allow the second hollow shaft 130 to rotate about the first hollow shaft 118. The rotation of the second hollow shaft 130 is actuated by a main spindle housing 140. The rotation of the second hollow shaft 130 operates various timing mechanisms of the rotating turret 112 such as the opening and closing of the grippers 94.
A gripper width adjustment mechanism 142 is positioned on the platform 122. The gripper with adjustment mechanism 142 includes a motor 144 having a rotating shaft 146 secured to a gear 148. The motor 144 is operatively controlled by the control station 86 in order to automatically adjust the width of each of the grippers 94 in response operator input into the display/input device 92 or the preloaded pouch characteristics relating to the indicia 34 of the pouch 18.
A second rotating shaft 150 includes a second gear 152 in meshing contact with the gear 146 so as to spin the second shaft 150 upon rotation of the motor 144. The second shaft 150 extends through an aperture formed in the platform 122 and a bearing 154. The second shaft 150 includes a threaded portion 151 which corresponds to a threaded portion 153 of the bearing 154 such that rotation of the second shaft 150 vertically displaces the second shaft 150 either upwardly or downwardly depending upon the rotation of the motor.
A link member 156 is pivotally attached to a terminal end of the second shaft 150 and pivotally attached to a yoke 158 at an opposite end. The yoke 158 is pivotally attached to a flange 160, at pivot axis P1, connected to a non-rotating cover of the main spindle housing 140. The yoke 158 includes a generally U-shaped end portion 162 having pins 164 extending inwardly. The U-shaped end 162 of the yoke 158 is attached to a barrel cam 166 which is rotatably and slidingly attached about the second hollow shaft 130. The barrel cam 166 includes a stepped portion 168 and a radially extending tab 170 between which the pins 164 are disposed. The connection of the pins 164 between the stepped portion 168 and the tab 170 allows the yoke 158 to raise and lower the barrel cam 166 even during rotation of the barrel cam 166.
With reference to
The pivot brackets 186 are operatively connected to the second hollow shaft 130 by a timing mechanism (not shown) and are operated by the timing mechanism to rotate when the grippers 94 are positioned at the loading station 96 and the unloading station 110 to grasp and release the pouches 18 articulating between the open position and the closed position. Upon rotation of the pivoting bracket 186 in a first direction, the roller 190 rolls in contact with the second roller 192 pulls the link member 182 which pivots the jaw 178 about pin 180 to open the jaw mechanism 176 when the particular gripper 194 is in the unloading station 96 and after a predetermined period of time set by the rotation of the second hollow shaft 130 and the timing mechanism, the pivoting bracket 186 rotates in an opposite second direction thereby pushing the link member 182 to pivot the jaw 178 about pin 180 closing the jaw mechanism 176 thereby securing the pouch 18 within the jaw mechanism 176.
As seen in
With reference to
For the interests of clarity,
In order to automatically adjust the width of the gripper 94 to accommodate various sized pouches 18, an operator enters a desired width into the display/input device 92 of the control station 86 as seen in
In the alternative, the robotic transfer device 14 articulates the swivel plate 80 into the pre-pick up position above the pouch delivery device 12. The optical sensor 84 then scans the indicia 34 and the controller 88 in the control station 86 accesses the database 90 in order to match the scanned indicia 34 with the preloaded pouch characteristics including pouch width.
Upon inputting a selected gripper width by an operator into the display/input device 92 of the control station 86 or from the preloaded pouch characteristics stored on the database 90, the controller 88 sends a signal to motor 144 to rotate shaft 146 in a first direction to narrow the gripper 94 width or a second direction to widen the gripper 94 width. The rotating shaft 146 rotates the gear 148 which consequently rotates gear 152 and the second shaft 150. As the second shaft 150 includes a threaded portion disposed within the threaded bearing 154, rotation of the gear 152 will vertically raise or lower the second shaft 150. Upon vertical movement of the second shaft 150, the yoke 158 will pivot around pivot axis P1 to slide the barrel cam 166 upwardly or downwardly about the second hollow shaft 130.
As the roller 202 rides on the cam edge 204 the roller 202 is consequently vertically displaced with the barrel cam 166. The vertical displacement of the roller 202 causes the lever 200 to pivot about pivot axis P2 thereby rotating link 203 to drive the rod 196. Raising the barrel cam 166 operates to raise the roller 202 which pivots the lever 200 about pivot axis P2 in a first direction which rotates the link 203 to push the rod 196. Forward movement of the rod 196 pushes the gripper arm 172 attached to the rod 196 by the ball joint 198. The gripper arms 172 pivot about gripper bases 174 in response to the forward movement of the rod 196 to widen the width of the grippers 94. Lowering the barrel cam 166 operates to lower the roller 202 to pivot the lever 200 about pivot axis P2 in a second direction which rotates the link to pull the rod 196. Reward movement of the rod 196 pulls the gripper arm 172 attached to the rod 196 by the ball joint 198. The gripper arms 172 pivot about the gripper bases 174 in response to the reward movement of the rod 196 to narrow the width of the grippers 94. As each of the plurality of gripper arms 94 includes an actuation mechanism 199 attached to the adjacent grippers 94, the widths of the terminal ends of each of the gripper arms 172 are selectively adjusted, by operator input into the display/input device 92 or pouch characteristics relating to the scanned indicia 34, to receive a variety of pouch having sizes.
A proximity sensor 207 is positioned on the flange 160 and senses the presence of a tab 209 extending from the second shaft 150. The proximity sensor 207 is connected to the control station 86 to stop operation of the motor 144 if the sensor 207 does not sense the tab 209. The proximity sensor 207 prevents the motor 144 from rotating the second shaft 150 beyond an upper or lower threshold to avoid damage to the gripper adjustment mechanism 142.
With reference to
A rotating bracket 234 is pivotally attached to the inner bracket 226 by pin 228. The rotating bracket 234 includes a first arm 236 having a roller 238 and a second arm 240 having a distal end 242 of a rod 244 attached by a ball joint 246. As seen in
A cam 264 attached to a fixed post 266 extending from the central shaft 114 rotates in conjunction with the shaft 114 and contacts a contacting member 268 attached to the bracket 250. Upon rotation of the shaft 114 and the fixed post 266, the cam 264 will contact the contact member 268 causing the bracket 250 to pivot about pin 254. The pivotal movement of the bracket 250 drives the rod 244 which rotates the rotating bracket 234 about the pin 228. A finger 270 is attached to each of the pins 228. The fingers 270 rest on the roller 238 in an offset manner as best seen in
The vertical movement of the reciprocating opening device 219 will now be discussed. With reference to
Disposed between the pin 276 and the first end 286 of the lever 274 is a roller 298 in contact with a rotating cam 300. The rotating cam 300 has an oblong shape which upon rotation drives the roller 280 to pivot the lever 274 about pin 276. During rotation of the cam 300 as the distance between the center point of the cam and the roller 298 decreases, the first end 286 of the lever 274 is pulled upwardly due to the biasing force of the biasing member 280 and the second end 288 of the lever 274 is pivoted downwardly. As the pins 296 of the yoke 290 are seated within the collar 296 of the connector 294, the downwardly movement of the second end 288 vertically displaces the connector 294 and consequently the sleeve 116 and the shaft 114 downwardly. As the traveling arm 220 is attached to the upper end 222 of the shaft 114, the downward displacement of the shaft 114 downwardly displaces the reciprocating opening device 219 which descends the opening fingers 224 into the upper edge 24 of pouch 18 in the opening station 102.
As the cam 300 continues to rotate and the distance between the center point of the cam 300 and the roller 298 increases, the first end 286 of the lever 274 is pushed downwardly against the biasing force of the biasing member 280 and the second end 288 of the lever 274 is pivoted upwardly. As the pins 296 of the yoke 290 are seated within the collar 296 of the connector 294, the upwardly movement of the second end 288 vertically displaces the connector 294 and consequently the sleeve 116 and the shaft 114 upwardly. As the traveling arm 220 is attached to the upper end 222 of the shaft 114, the upward displacement of the shaft 114 upwardly displaces the reciprocating opening device 219 which raises the opening fingers 224 from the pouch 18 at the filing station 104.
A guide 302 is attached to the lower end 304 of the shaft 114. The guide 302 includes a bushing 306 in sliding contact about a guide post 308 upon which the bushing 306 rides during the vertical displacement of the shaft 114. The guide 302 provides stability to the rotating turret 112 during vertical displacement of the central shaft 114 by the vertical cam mechanism 272.
The reciprocating rotational movement of the reciprocating opening device 219 between the opening station 102 and the filling station 104 will now be discussed. With reference to
During rotation of the rotating cam 322 as the distance between the central point of the cam 322 and the roller 320 decreases, the bracket 312 pivots about the pin 316 to rotate the second arm 324 in forward direction. The movement of the second arm 324 drives the rod 326 forward which rotates the connector 294. The rotation of the connector 294 rotates the sleeve 116 and the central shaft 114 from an opening position, in which the reciprocating opening device 219 is positioned at the opening station 102, and a filling position, in which the reciprocating opening device 219 is positioned at the filling station 104. Further, the rotation of the central shaft 114 by the rotating cam mechanism 310 from the opening position to the filling position rotates the reciprocating opening device 219 from the opening station 102, as seen in
During rotation of the cam 322 as the distance between the central point of the cam 322 and the roller 320 increases the bracket 312 pivots about the pin 316 to rotate the second arm 324 in rearward direction. The movement of the second arm 324 drives the rod 326 rearward which rotates the connector 294. The rotation of the connector 294 rotates the sleeve 116 and the central shaft 114 from the filling position, in which the reciprocating opening device 219 is positioned at the filling station 104, and the opening position, in which the reciprocating opening device 219 is positioned at the opening station 102. Further, the rotation of the central shaft 114 by the rotating cam mechanism 310 from the filling position to the opening position rotates the reciprocating opening device 219 from the filling station 104, as seen in ghost in
With reference to
Supplemental openers 334, such as suction cups, are optionally disposed at the opening station 102 on either side of the pouch 18 have at least partially opened the upper edge 24 of the pouch 18. In the alternative, the upper edge 24 of the pouch 18 has been previously opened by the first feature station 98 in the form of a first opening station and the remainder of the pouch 18, the area adjacent the lower edge 26, has been opened by the second feature station 100 in the form of a second opening station.
The cam 300 of vertically adjusting cam mechanism 272 rotates allowing the first end 286 to be raised by the biasing member 280. The upward movement of the first end 286 consequently lowers the second end 288 which due to the attachment of the yoke 290 to the connecting member 294 lowers the connecting member 294, the shaft 114, and the reciprocating opening device 219. The lowering of the reciprocating opening device 219 operates to lower the traveling arm 220 and opening fingers 224 into the open end of the pouch 18.
As the opening fingers 224 descend within the pouch 18, the cam 322 of the rotating cam mechanism 310 rotates the connector 294, the shaft 114 and the reciprocating opening device 219. The rotation of the shaft 114 rotates the cam 264 so as to abut the contacting member 268 pivoting the bracket 250 about pin 254 which pushes rod 244 forward, rotating rotating bracket 234 such that the roller 238 is lowered thereby pivoting the fingers 270 allowing the biasing mechanism 232 to bias the opening fingers from the closed position to the open position thereby opening the upper edge 24 of the pouch 18. Further, as the reciprocating opening device 219 rotates with the rotation of the shaft 114 by the rotating cam mechanism 310, the traveling arm 220 which has descended with the opening fingers 224 opens the upper edge 24 of the pouch 18 as the pouch 18 rotates with the grippers 94 from the opening station 102 to the filling station 104.
With the reciprocating opening device 219 is now in the filling position at the filling station 104 as seen in ghost in
It is appreciated, of course, that the traveling arm 220 is operated in a reciprocating manner traveling with the pouch 18 from the opening station 102 to the filling station 104 keeping the pouch 18 open to facilitate the descent of the funnel 336 into the pouch 18 and travel back to the opening station 102 in order to open the next pouch 18 which has rotated into the opening station 102.
The reciprocating opening device 219 is optionally controllable by the control station 86 through operator input into the display/input device 92. This allows an operator to stop the reciprocating movement of the reciprocating opening device 219 and the vertical cam mechanism 271 and the rotating cam mechanism 310.
With reference to
During filling of the pouches 18, the lower flexible portion 350 enters the upper portion 24 of the pouch 18 between the opening fingers 224. Product then enters the open top portion 342 and extends through the rigid portion 340 exiting the open bottom portion 344 thereby entering the flexible lower portion 350. The fingers 352 in conjunction with the elastic member 360 provide a cushioning as the product descends through the funnel 336 in order to direct the product within the pouch 18 without damaging the product or clogging the flexible funnel 336. The lower flexible portion 350 allows the product to hinge any of the plurality of fingers 352.
Having described the invention, however, many modifications thereto will become apparent to those skilled in the art to which it pertains without deviation from the spirit of the invention as defined by the scope of the appended claims.
This application is a continuation of U.S. patent application Ser. No. 12/840,617, filed Jul. 21, 2010, which is a continuation-in-part of U.S. patent application Ser. No. 11/947,173 filed Nov. 29, 2007, now abandoned, which claims priority of U.S. Provisional Patent Application Ser. No. 60/867,657 filed Nov. 29, 2006, both of which are incorporated herein by reference.
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