JP6084955B2 - Film conveying device with check valve and packaging bag manufacturing device - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a packaging bag equipped with a check valve for venting gas, and further includes a check valve of a check valve sheet fed from the check valve mounting apparatus to a flowing raw film. The present invention relates to a film conveying apparatus with a check valve that is mounted and conveyed one by one.

  In recent years, for example, in a coffee powder packaging bag in which coffee powder is filled in a packaging bag, it has become possible to drink fragrant coffee by removing the gas emitted from the coffee powder. Gas venting is performed by opening an air passage in one packaging bag and attaching a check valve at that position. The check valve attached to the plastic film has been developed in the past, and is configured so that air from the outside does not enter the packaging bag even if gas from the inside of the packaging bag escapes. Is.

  Conventionally, as in Patent Document 1, the check valve is attached to the original film, and the bag is filled with coffee powder. As in Patent Document 2, the check valve is previously applied to the plastic film. After winding in a roll shape in a state of attaching a non-return valve-equipped film, coffee powder is filled, and as disclosed in Patent Document 3, a large number of valves are cut one by one from the valve seat 2 An apparatus for intermittently inserting between the edges of a single plastic sheet has been disclosed.

JP 07-267205 A JP 2002-308291 A Japanese Patent Laid-Open No. 05-220873

  However, in the case of Patent Document 1, since the position of the check valve attached to the plastic film is arranged so as to straddle both ends of the plastic film when it is formed into a cylindrical shape, the state of outgassing is insufficient. As a result, there was a risk of reducing the freshness of the coffee.

In the case of Patent Document 2, since the check valve is wound in a roll shape, the plastic film around the check valve is more easily wrinkled when wound tightly. A process of stretching the heel is required. In addition, if the check valve to be rolled up is always installed in the same position in the width direction of the plastic film, it will swell at one position when it is wound. A check valve had to be installed by drilling a hole at a position offset in the direction. This is time-consuming and expensive, both when the vent hole is drilled and when the check valve is attached. Further, even if the offset is made, the swelling cannot be prevented at the position where the check valve is attached, and there is a possibility of poor feeding in the bag making apparatus.

  Furthermore, in the case of Patent Document 3, the valve is cut from a valve seat having a large number of valves and inserted between the edges of the two plastic sheets intermittently. Since the operation of inserting the valve and the operation of widening the gripping claws for gripping the valve are performed, it takes a lot of time to insert the valve cut from the valve seat. Therefore, the production efficiency has been reduced. In addition, since the bulb is arranged so as to straddle between the edges of the two plastic films, the state of outgassing becomes insufficient, and the freshness of the coffee may be lowered.

In order to solve the above-mentioned problems, the present invention attaches a check valve to an arbitrary position in the width direction of the original film, and eliminates wasted time and efficiently attaches the check valve. Providing a film transport device with a check valve that transports the film as it is to the manufacturing process of the packaging bag, and manufacturing a packaging bag for making a film with a check valve sent by the film transport device with a check valve An object of the present invention is to provide an apparatus, which is configured as follows. That is,
The invention according to claim 1 is a film transport device with a check valve that transports with a check valve for degassing an arbitrary position of the original film, and is unwound from the original roll. An air passage forming device for forming an air passage at a position where the check valve is mounted on the original film, and a check valve in which a number of check valves are arranged in series on the original film on which the air passage is formed. A check valve mounting device that transports a sheet and mounts one check valve in accordance with each of the air passages, and the check valve mounting device is driven by a driving device. A movable plate that conveys the check valve sheet at a predetermined interval; and a gripping roller that grips the check valve sheet placed on the movable plate, and when the check valve sheet is fed, Rotation locked When the gripping roller returns, the gripping roller rotates idly while gripping the check valve sheet, so that the check valve seat remains and the moving plate returns to the original position. It is characterized by returning.

  According to this, the film conveying apparatus with a check valve forms an air passage at an arbitrary position of the original film, and then attaches the check valve in accordance with the position of the air passage. The check valve seat is conveyed while being gripped by the moving plate and the gripping roller by the driving device. When the gripping roller returns together with the moving plate, the gripping roller can return with the check valve film gripped by idling with respect to the check valve film. Therefore, the release process for the check valve film can be omitted in the conveyance / return process in the gripping roller, and accordingly, the conveyance time can be shortened in one conveyance cycle.

  The invention according to claim 2 relates to the invention according to claim 1, wherein the air passage is formed in a cut shape having almost no cut width.

  According to this, since the air passage is not a hole but a cut shape having almost no cut width, the air in the check valve can be discharged by the cut, and there is almost no cut. Therefore, there is little possibility that foreign matter is mixed in, and there is little possibility of backflow of air from the outside.

  Invention of Claim 3 is a manufacturing apparatus of a packaging bag, Comprising: The air passage formation apparatus which forms the notch-like air passage which has almost no cut width in the position which installs the non-return valve in an original fabric film, A check valve in which a check valve sheet in which a large number of check valves are arranged in series is conveyed to the original fabric film in which an air passage is formed, and one check valve is attached to each of the air passages. A film conveying device with a check valve comprising a mounting device, and a powder filling device that forms a packaging bag with a check valve by filling the conveyed film with the check valve with powder. The check valve mounting device includes a moving plate that conveys the check valve sheet at a predetermined interval by a driving device, and a gripping roller that grips the check valve sheet placed on the moving plate, and the check valve Before feeding the valve seat, The gripping roller is moved together with the moving plate in a rotationally locked state, and when the gripping roller returns, the gripping roller idles while gripping the check valve sheet, leaving the check valve sheet. The moving plate returns to the original position together with the moving plate.

  According to this, by the check valve insertion device, the check valves, which are sequentially mounted in the film conveying device with a check valve, are separated one by one as one packaging bag by the powder filling device. Can be completed. Therefore, since it is not continuously wound as a packaging bag film with a check valve, it is possible to prevent swelling at the position where the check valve is mounted. In addition, when the check valve is mounted on the original film, the gripping roller that grips the check valve sheet does not release the check valve sheet when the gripping roller is returned. The conveyance of the film with a valve can be shortened. Furthermore, since the air passage forming device forms a slit-like air passage having almost no cut width, there is no possibility of foreign matter or external backflow from the finished package.

It is a front view which shows the manufacturing apparatus by one Embodiment. It is a top view in FIG. It is a figure which shows the shape of the air path in one Embodiment. It is a figure which shows another form of an air path. It is a front view which shows the air passage formation apparatus of the manufacturing apparatus in FIG. FIG. 4 is a detailed view showing a rack and pinion mechanism of the slit device in FIG. 3. It is the same top view. It is a front view which shows the non-return valve mounting part of the manufacturing apparatus in FIG. (A) It is an effect | action figure which shows the feed effect | action of the check valve seat in the check valve mounting part of FIG. (B) It is an effect | action figure which shows the return effect | action of the holding roller. It is a front view which shows the powder filling apparatus in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows the front of a manufacturing apparatus (hereinafter referred to as a manufacturing apparatus or simply a manufacturing apparatus) 1 for a package with a check valve, and FIG. 2 shows the plane thereof.

  As shown in FIGS. 1 and 2, the manufacturing apparatus 1 of the embodiment includes a check valve C (FIG. 8) on a plastic original film (hereinafter simply referred to as a film) F unwound from an original roll 12. A film conveying device 10 with a check valve and a check valve C (hereinafter referred to as a film with a check valve) F1 is formed into a cylindrical shape with the upper part opened and filled with powder. And a powder filling device 30 that is sealed and formed into a bag shape.

  The film transport device 10 with a check valve is wound from the original roll 12 with the film F wound around the front of the body 11 (on the powder filling device 30 side of the check valve film transport device 10), and the original roll 12. An air passage forming device 13 for forming a slit-like air passage K having almost no cut width in the disassembled film F, and a check valve mounting device for attaching a check valve C in accordance with the position of the formed air passage K 15, the present seal forming device 17 for attaching the check valve C to the film F, and the water cooling device (cooling device) 18 for cooling the heated film F1 with the check valve C to which the check valve C is mounted. And a mark sensor 19 for sensing a print mark for sending at a pitch of.

  The film F unwound from the raw roll 12 is stretched by the guide roll unit 14 and then the air passage forming device 13 disposed on the downstream side thereof has a slit-like air passage K along the flow direction. It is formed near the center of the film F in the width direction. As shown in FIG. 3, the air passage K of the embodiment has an I-shaped one end formed in a Y-shape. The air passage K is preferably not formed in a hole shape but formed in a cut shape having almost no cut width. For example, a C-shaped air passage K1 as shown in FIG. 4A or FIG. ) May be an I-shaped air passage K2 having a Y-shape at both ends. Further, as shown in FIG. 4C, an air passage K3 in which small holes are formed at both ends of a rod shape may be used. Of course, it may be formed in a hole shape instead of a cut shape. In any case, after the air passage K is formed, the check valve C is mounted so as to overlap the air passage K in the check valve mounting device 15.

  Various check valves can be used as long as the check valve C is configured so as to discharge internal air and prevent external air from passing when forming the packaging bag. The shape of the check valve C is not particularly limited.

  As shown in FIGS. 5 to 7, one embodiment of the air passage forming device 13 includes a main body support portion 131 supported by the body 11 (see FIG. 1) and a main body support portion 131 above the flowing film F. A supported air cylinder 132 and a cut portion 20 connected to the air cylinder 132 via a lever 133 are provided.

  The cut portion 20 includes a vertical support plate 201 rising from a bottom plate 131 a of the main body support portion 131 and an upper plate 202 and a lower plate 203 that move up and down by the operation of the air cylinder 132. The upper plate 202 and the lower plate 203 are connected by four guide posts 204. A shaft 21 connected to one end of the lever 133 is disposed on the vertical support plate 201 so as to protrude in the horizontal direction with respect to the vertical support plate 201. On the shaft 21, a pinion 22 is attached to the lever 133 and is disposed so as to be rotatable with respect to the shaft 21 as the lever 133 swings. A rack plate 23 having a rack gear 231 that can mesh with the pinion gear 221 of the pinion 22 is erected on the lower plate 203 and arranged to be movable in the vertical direction. A rack plate guide 24 supported by the vertical support plate 201 is slidably disposed on the back portion of the rack plate 23 opposite to the rack gear 231. The four guide posts 204 are guided by a guide bush 205 fixed to the bottom plate 131a of the main body support portion 131 so as to be slidable in the vertical direction.

  A cutting blade 25 for forming an air passage K is attached to the lower surface side of the lower plate 203. As the cutting blade 25, a pinnacle blade or a Thomson blade is used to form a cut in the film F. The cutting blade 25 is formed according to the shape of the air passage K (or K1 to K3) formed in the film F. The body 11 is provided with a receiving portion 111 that forms a flat upper surface at a position facing the cutting blade 25, and the film F flows on the upper surface of the receiving portion 111. Therefore, the air passage K is cut into the film F by pressing the cutting blade 25 lowered toward the film F flowing on the receiving portion 111.

  At the four corners of the upper plate 202, cutting blade height adjustment bolts 26 for adjusting the height of the cutting blade 25 by adjusting the vertical movement amount of the cutting portion 20 are arranged.

  Note that the air passage forming device 13 is not the one having the above-described configuration, but simply forms a slit-like air passage K having almost no cut width by using a cylinder device provided with a cutting blade 25 at the tip. Also good.

  A check valve mounting device 15 is attached to the airframe 11 on the downstream side beyond the air passage forming device 13 along the flow direction of the film F. As shown in FIG. 8, the check valve mounting device 15 temporarily mounts the check valve C at a position overlapping the air passage K formed by the air passage forming device 13. The check valve seats C1 formed continuously are sent in a direction orthogonal to the flow of the film F, and the check valves C are cut off one by one from the check valve seat C1.

  The check valve mounting device 15 includes a servo motor 152 provided on the machine base 151. A connecting plate 154 is movably screwed to the machine base 151 to a screw 153 attached to the tip of the servo motor 152, and the moving plate 155 is connected to the connecting plate 154.

  On the other hand, a check valve seat C1 in which a check valve C is continuously formed is wound around a check valve seat reel 156. The check valve sheet C1 unwound from the check valve seat reel 156 is fed onto the film F while being sandwiched between the gripping roller 157 and the moving plate 155 (also referred to as being gripped). A one-way clutch is attached to the gripping roller 157, and an outer ring 157a of the gripping roller 157 is configured to be rotatable only in one direction with respect to the shaft 157b of the gripping roller. Since the gripping roller 157 is attached to the moving plate 155 via the support body 158, the check valve seat disposed integrally with the moving plate 155 on the front end side of the moving plate 155 is driven by the servo motor 152. It is moved to the presser foot 159 (the portion corresponding to the position of the air passage K of the film F).

  That is, as shown in FIG. 9A, when the check valve seat C1 is moved to the position of the air passage K of the film F, the gripping roller 157 has its outer ring 157a in the locked state and the shaft 157b. Does not rotate with respect to. Therefore, as the moving plate 155 moves forward (on the air passage K side of the film F) by driving the servo motor 152, the gripping roller 157 also moves without rotating. Therefore, the moving plate 155 and the gripping roller 157 The gripped check valve sheet C1 is conveyed.

  Further, as shown in FIG. 9B, when the moving plate 155 returns to the original position, the gripping roller 157 returns to the original position as the moving plate 155 moves, but the outer ring 157a is the gripping roller. 9 rotates in the clockwise direction in FIG. 9 with respect to the moving plate 155 while holding the check valve seat C1. Therefore, the moving plate 155 and the gripping roller 157 return to their original positions, but the check valve seat C1 is left as it is.

  As described above, since the one-way clutch mechanism is formed on the gripping roller 157, the gripping roller 157 can reciprocate while gripping the check valve seat C1 between the gripping roller 157 and the moving plate 155. Therefore, since the gripping roller 157 is not released with respect to the check valve sheet C1, the time for conveying the check valve sheet can be shortened, and the production efficiency can be improved.

  When the check valve seat C1 feeds one check valve C forward and the check valve C at the tip reaches the position of the air passage K, the check valve seat C1 is supported by the machine base 151. It is supported by the lower surface of the valve seat presser 159. In this state, the check valve C is cut by the horizontal movement of the cutter 160 with respect to the check valve seat C1 by the cutter 160 of the cutter device supported by the machine base 151. The cutter 160 is disposed near the gripping roller 157 side of the check valve sheet presser 159. The check valve seat retainer 159 is filled with a sealant, and the check valve C supported on the lower surface of the check valve seat retainer 159 is formed by a cylinder mechanism configured as a check valve seat retainer. It is moved onto the passage K and temporarily sealed on the spot. A mark sensor 161 is disposed between the cutter 160 and the gripping roller 157, and the distance between the formed air passages K is detected to check the feed amount of the check valve seat C1. Yes. Further, in FIG. 8, the film F travels from the back side to the front side of the paper surface, and the check valve seat C1 is sent from the right side to the left side in FIG.

  As shown in FIG. 1 or FIG. 2, the seal forming device 17 is disposed on the downstream side of the check valve mounting device 15. The seal forming device 17 performs the main sealing of the check valve C temporarily sealed by the check valve mounting device 15 as the main sealing step, and after heating with a heater, the reverse temporarily attached by the film F1 with the check valve. The stop valve C is further pressed by an air cylinder or the like and attached.

  In the water cooling device (cooling device) 18 disposed downstream of the seal forming device 17, the check valve C heated as a cooling step is cooled with water using an air cylinder and the temperature is lowered. They are sent to the filling device 30.

  A mark sensor 19 disposed on the downstream side of the water cooling device 18 detects marks printed at a constant pitch. Thereby, the feed amount of the film F1 with a check valve can be made constant.

  On the downstream side of the water cooling device 18, the feed-side guide roll body 3 is disposed at the most downstream end of the film conveying device 10 with a check valve, and the film F1 with a check valve is discharged from the film conveying device 10 with a check valve. It is sent toward the body filling device 30.

  The powder filling device 30 forms the film F1 with a check valve in the half-shaped bag 4 having an upper opening, and after filling the half-shaped bag 4 by injecting powder from the opening of the half-shaped bag 4, The opening is sealed to form one bag of checkered packaging bag 5.

  As shown in FIG. 10, the powder filling apparatus 30 includes a machine body 31, a half bag forming portion 32 that forms a film F 1 with a check valve on the half bag 4, and a half filled with powder from a hopper 34. And a packaging bag forming portion 33 that seals the opening of the bag 4 and cuts it into one bag. In addition, at the uppermost stream end of the machine body 31, a reception-side guide roll body 7 that receives the film F <b> 1 with a check valve sent from the feed-side guide roll body 3 is disposed. Between the feeding-side guide roll body 3 and the greeting-side guide roll body 7, a film F1 with a check valve extends downwardly from the feeding-side guide roll body 3 side toward the greeting-side guide roll body 7, A check valve confirmation camera 35 capable of projecting the check valve C mounted on the film F1 with check valve is mounted in the airframe 31 toward one portion of the film F1 with check valve tilted downward. Yes. Accordingly, it is always confirmed that the check valve C is attached to the film F1 with check valve and the packaging bag 5 with check valve sent from the film conveying device with check valve 10 to the powder filling device 30. can do.

  In the half bag forming part 32, the film F1 with a check valve that has flowed in a flat shape is folded at the center in the width direction to form a half bag, and then both ends are longitudinally sealed 321 and sealed in the longitudinal direction. By forming a horizontal seal 322 on the lower part, the half-shaped bag 4 having an open upper part is formed. In this state, the powder stored in the hopper 34, in the embodiment, coffee powder is filled into the half bag 4 for one bag. Next, one half bag 4 filled with coffee powder is pulled downward by one bag, and the upper part of the half bag 4 filled with coffee powder is horizontally sealed in the packaging bag forming portion 33. And the packaging bag 5 with a check valve for one bag can be taken out by cut | disconnecting the intermediate part of the seal | sticker to a horizontal direction.

  Next, the operation of the manufacturing apparatus 1 configured as described above will be described.

  The film F unrolled from the raw roll 12 is formed with an air passage K having almost no cutting width by the cutting blade 25 of the air passage forming device 13 while being stretched by various guide roll portions 14. In the air passage forming device 13, the piston rod of the air cylinder 132 extends, and the lever 133 at the tip is swung around the shaft 21.

  Since the pinion 22 is attached to the tip of the lever 133, the pinion 22 rotates in one direction (in the embodiment, clockwise in FIG. 5 or FIG. 6) when the lever 133 swings. The rack plate 23 meshed with the rack gear 231 is moved downward (see FIG. 5 or 6) with the pinion gear 221 of the pinion 22, and the rack plate 251 is lowered. When the rack plate 251 is lowered, the cutting blades 25 are lowered at a predetermined pitch through the lower plate 203. The cutting blade 25 abuts on the receiving portion 111 and stops moving downward, and forms a cut in the film F traveling on the receiving portion 111.

  The lower plate 203 can be moved vertically by the four guide posts 204, and the rack plate 23 is slidably guided by the rack plate guide 24 in the vertical direction on the back, so that the vertical plate is accurate in the vertical direction. Well guided to move.

  Since the air passage K cut into the film F is cut in a linear shape and is not a hole, there is little possibility of contamination. Further, the position of the air passage K can be formed anywhere in the width direction of the film F because the cut portion 20 is arranged to be movable and adjustable with respect to the width direction of the film F.

  The film F in which the air passage K is formed is mounted with the check valve C at the position of the air passage K in the check valve mounting device 15 disposed on the downstream side of the air passage forming device 13. The unrolled check valve seat C1 flows in a direction orthogonal to the flow direction of the film F and is temporarily sealed at a position in contact with the air passage K of the film F. At the same time, one check valve C is cut from the check valve seat C1.

  The film F1 on which the check valve C is temporarily sealed is heat-sealed by heating the temporarily sealed check valve C in the main seal forming device 17 installed on the downstream side along the flow direction, and further on the downstream side. The water is cooled by a water cooling device 18 installed in the water and sent downstream. The mark sensor 19 disposed on the downstream side is controlled so as to read the mark printed on the film F and make the feed pitch constant.

  The film F1 with a check valve that has passed through the mark sensor 19 is disposed at the most upstream end of the powder filling device 30 from the feed-side guide roll body 3 disposed at the most downstream end of the film transport device 10 with a check valve. The check valve C is attached to the film F1 with the check valve by the check valve confirmation camera 35 arranged in the powder filling device 30 in the middle of the pick-up side guide roll body 7. Make sure.

  In the powder filling device 30, the film F1 with a check valve that has passed through the pick-up guide roll body 7 is sent upward and folded at the intermediate portion in the width direction of the film F1 with a check valve to form a half bag. Is done. In this state, the mating surfaces of both edges are not connected. After that, the film F1 with a check valve is vertically sealed 321 and formed into the half bag 4, and then the powder is filled from the hopper 34. The half bag 4 filled with powder is pulled from below and pulled down by one bag. The upper part of the filled powder is then laterally sealed 322 to form the packaging bag 5 with a check valve. As a result, the check bag-equipped packaging bag 5 filled with one bag of powder is separated.

  As described above, the packaging bag manufacturing apparatus 1 is arranged so that the non-return valve-equipped film conveyance device 10 and the powder filling device 30 are arranged separately, and in the non-return valve-equipped film conveyance device 10. Since the check valve C is mounted in the flow of the film F and is conveyed as it is as the film F1 with check valve, the packaging bag 5 with check valve is sequentially formed in the powder filling device 30. In the state where the valve C is mounted, it is not wound as a winding roll. For this reason, it is possible to prevent a part from expanding and to cause wrinkling. In addition, since the check valve C can be mounted at any position in the width direction of the film F without being overlapped, it can be smoothly fed and the check valve C is mounted on the packaging bag 5 with the check valve. Therefore, air does not leak from the packaging bag 5 with a check valve formed.

  Further, in the air passage forming device 13, the air passage K is not formed with a hole in the film F, but is formed with a cut having almost no cutting width, so that foreign matters entering from the outside can be prevented.

  Further, in the check valve mounting device 15, since the gripping roller 157 includes a one-way clutch mechanism, the gripping roller is configured such that the outer ring 157a is rotationally locked during the feeding process and the outer ring 157a is idled during the return process. The check valve seat C1 can be reciprocated between the moving plate 157 and the moving plate 155. Therefore, the time for conveying the check valve sheet can be shortened, and the production efficiency is improved.

  In addition, although the manufacturing apparatus 1 of the package of embodiment demonstrated with the horizontal pillow type packaging machine, it is not limited to the above-mentioned form, For example, a vertical pillow type packaging machine may be sufficient. That is, the check valve mounting device 15 may be mounted on a check valve film transport device having a machine base 151 that is formed vertically long. Further, the powder filled in the hopper 34 is not limited to coffee powder.

DESCRIPTION OF SYMBOLS 1, Manufacturing apparatus 5, Packaging bag 10, Check valve mounting apparatus 13, Air passage formation apparatus 15, Check valve mounting apparatus 155, Moving plate 157, Grip roller 159, Check valve sheet presser 160, Cutter F, Film F1 , Film with check valve K, Air passage C, Check valve C1, Check valve seat

Claims (3)

A film transport device with a check valve that transports by mounting a check valve for degassing an arbitrary position of the raw film,
An air passage forming device that forms an air passage at a position where the check valve is mounted on the raw film unrolled from the raw fabric roll;
A check valve in which a check valve sheet in which a number of check valves are arranged in series is conveyed to the original film that has formed the air passage, and one check valve is attached to each of the air passages. And a valve mounting device,
The check valve mounting device includes a moving plate that conveys the check valve sheet by a driving device at a predetermined interval, and a gripping roller that grips the check valve sheet placed on the moving plate,
At the time of feeding the check valve seat, the gripping roller is moved together with the moving plate in a rotationally locked state,
When the gripping roller is returned, the gripping roller rotates idly while gripping the check valve sheet, thereby returning to the original position together with the moving plate while leaving the check valve sheet. Film transport device with stop valve.   The film conveying apparatus with a check valve according to claim 1, wherein the air passage is formed in a cut shape having almost no cut width. An air passage forming device that forms a slit-like air passage having almost no cut width at a position where the check valve is mounted on the raw film, and a number of check valves are arranged in series on the raw film that has formed the air passage A non-return valve-equipped film transport device, comprising: a non-return valve mounting device that transports the non-return valve seat and mounts the one check valve in accordance with each of the air passages;
A powder filling device that fills the conveyed film with a check valve with powder to form a packaging bag with a check valve, and
The check valve mounting device includes a moving plate that conveys the check valve sheet by a driving device at a predetermined interval, and a gripping roller that grips the check valve sheet placed on the moving plate,
At the time of feeding the check valve seat, the gripping roller is moved together with the moving plate in a rotationally locked state,
When the gripping roller returns, the gripping roller idles while gripping the check valve sheet, and thus returns to the original position together with the moving plate while leaving the check valve sheet. Bag manufacturing equipment.

Images