JP2016159955A - Container sealing device and container sealing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container seal device capable of preventing variation in an interval of register marks on a film even when the film is extended.SOLUTION: A container seal device 10 comprises: a container feeding part 11 for feeding a container 40; a film transfer part 12 for transferring a belt-like film 50 along a transfer direction; a mark imparting part 13 for imparting a positioning mark M to the film 50 at a predetermined space S; and a mark detection part 14 for detecting the positioning mark M on the film 50. A film sticking part 15 for sticking the film 50 to the container 40 fed by the container feeding part 11 is provided on the downstream side of the mark detection part 14 in a transfer direction D. When the mark detection part 14 detects the positioning mark M on the film 50, the transfer of the film 50 is stopped, and the film sticking part 15 sticks the film 50 to the container 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container sealing device and a container sealing method for sealing a film against a container.

  2. Description of the Related Art Conventionally, there is known a container sealing device that fills a container such as a tray with contents and seals the opening of the container with a film (see Patent Documents 1 and 2).

  In such a container sealing device, the film is conveyed by a certain length and then stopped at a predetermined stop position. At this time, the stop position of the film is generally controlled by detecting a registration mark (alignment mark) printed on the film with a sensor. Printing of the registration mark on the film is performed in advance by a film manufacturer. Therefore, a film on which a registration mark is printed in advance is supplied in a roll shape and set in a container sealing device.

JP 59-187507 A JP 2002-264903 A

  However, conventionally, when using a particularly stretchable film, the film is stretched at the manufacturing stage of the film maker or inside the container seal device, which causes a problem that the distance between the registration marks varies. For this reason, in the container seal device, it is necessary to adjust the tension applied to the film so that the distance between the registration marks does not deviate from the target distance, or to control the conveyance speed of the film.

  The present invention has been made in consideration of the above points, and a container sealing device and a container capable of preventing a problem in which the interval between alignment marks on the film varies even when the film extends. An object is to provide a sealing method.

  The present invention provides a container sealing device that seals a container with a film, a container supply unit that supplies the container, a film transfer unit that transfers a strip-shaped film along a transfer direction, and the film transferred by the film transfer unit. A mark applying unit that provides alignment marks at predetermined intervals, a mark detection unit that is provided downstream of the mark applying unit in the transport direction and detects the alignment marks on the film, and the mark detection A film adhering part that adheres the film to the container supplied by the container supplying part, and the mark detecting part is positioned on the film. In response to detecting the mark, the transfer of the film is stopped, and the film is attached to the container by the film sticking unit. A container sealing apparatus characterized by being stuck on.

  The present invention is the container seal device characterized in that a label sticking part for sticking a label to the film is provided between the mark detection part and the film sticking part.

  The container sealing device according to the present invention is characterized in that a corona treatment unit is provided on the upstream side in the transport direction of the label sticking unit to corona-treat a portion of the film where the label is stuck in advance. It is.

  In the present invention, the film sticking unit has a seal head for sticking the film to the container, and the seal head forms a lid film corresponding to each container by punching the film. A container seal device characterized by the above.

  In the present invention, when the position where the alignment mark is detected by the mark detection unit is a detection position, and the position where the film is attached by the film attachment unit is the attachment position, the transfer direction of the film A distance between the detection position and the sticking position along the position is an integral multiple of the interval between the alignment marks.

  The present invention relates to a container sealing method for sealing a container with a film, a container supply step for supplying a container, a film transfer step for transferring a strip-shaped film along a transfer direction, and a predetermined interval with respect to the transferred film. A mark applying step for applying an alignment mark in step, a mark detecting step for detecting the alignment mark on the film after the mark applying step, and a film for attaching the film to the supplied container A container sealing method comprising: an attaching step, wherein the transfer of the film is stopped in response to detecting the alignment mark on the film, and the film is attached to the container. is there.

  The present invention is a container sealing method further comprising a label sticking step of sticking a label to the film.

  The present invention is a container sealing method, further comprising a corona treatment step of previously corona treating a portion of the film where the label is attached.

  The present invention is the container sealing method, wherein, in the film sticking step, a lid film corresponding to each container is formed by punching the film.

  According to the present invention, the mark applying unit applies alignment marks to the film at a predetermined interval, and the transfer of the film is stopped in response to the mark detection unit detecting the alignment mark on the film, A film is stuck to a container by a film sticking part. Thereby, even when the film is extended, it is possible to prevent a problem that the interval between the alignment marks on the film varies.

FIG. 1 is a schematic front view showing a container sealing device according to an embodiment of the present invention. FIG. 2 is a schematic plan view showing a film for sealing a container.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are diagrams showing an embodiment of the present invention.

  The outline of the container sealing device according to the present embodiment will be described with reference to FIG.

  The container sealing apparatus 10 shown in FIG. 1 produces the container 60 with a film by sealing the opening part of containers 40, such as a tray, with the film 50 so that it may mention later. Such a container sealing device 10 includes a container supply unit 11, a film transfer unit 12, a mark applying unit 13, a mark detection unit 14, and a film sticking unit 15.

  Among these, the container supply part 11 has the inverter conveyor 16 located in the front | former stage, and the servomotor conveyor 17 located in a back | latter stage. In this case, the inverter conveyor 16 and the servo motor conveyor 17 constitute a grouping conveyor 20.

  The inverter conveyor 16 conveys a plurality of containers 40 that have been supplied at undefined intervals from a previous process (not shown) to the servo motor conveyor 17 side. The inverter conveyor 16 is continuously driven during a series of container sealing operations. In each container 40, contents 41 such as food are stored in advance. The container 40 is a single layer sheet such as a thermoplastic resin such as PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), or a barrier layer such as EVOH or nylon (registered trademark). It may be produced by forming a multilayer sheet containing

  A first stopper 18 having a configuration that can be opened and closed from both sides of the container 40 is provided on the inverter conveyor 16. When the first stopper 18 is closed, the plurality of containers 40 stay in a row on the upstream side (left side in FIG. 1) of the first stopper 18. On the other hand, when the first stopper 18 is opened, the container 40 passes between the first stoppers 18.

  Between the inverter conveyor 16 and the servo motor conveyor 17, the 2nd stopper 19 which has the structure which can be opened and closed from the both sides of the container 40 is provided. When the second stopper 19 is closed, one container 40 stands by between the first stopper 18 and the second stopper 19. On the other hand, when the second stopper 19 is opened, the waiting container 40 passes between the second stoppers 19 and is conveyed to the servo motor conveyor 17 side.

  The servo motor conveyor 17 is intermittently controlled by a servo motor (not shown). Thereby, it is possible to align a plurality (three in FIG. 1) of containers 40 on the servo motor conveyor 17 at regular intervals. A sensor 21 that detects the container 40 is disposed on the servo motor conveyor 17. Note that the number of containers 40 arranged on the servo motor conveyor 17 is not necessarily plural, and only one container 40 may be arranged at a predetermined position on the servo motor conveyor 17.

  A container transfer arm (tray transfer arm) 22 is provided in the vicinity of the servo motor conveyor 17. The container transfer arm 22 collectively holds a plurality (three in FIG. 1) of containers 40 arranged at regular intervals on the servo motor conveyor 17 and maintains the distance between the containers of the film sticking unit 15. The sample is transferred onto a holding unit 29 (described later).

  On the other hand, the film transfer unit 12 transfers the belt-like film 50 along the transfer direction D. The film transport unit 12 is intermittently controlled by a servo motor (not shown), and can transport the film 50 from the unwinding roll 23 toward the winding roll 24 or temporarily stop the transport of the film 50. is there. In the present specification, the transfer direction D refers to a direction in which the film 50 is conveyed while being unwound from the unwinding roll 23 and being wound by the winding roll 24.

  The film transfer unit 12 includes an unwinding roll 23 for unwinding the strip-shaped film 50 and a winding roll 24 for winding the remaining film other than the portion attached to the container 40 in the strip-shaped film 50. Yes. Of these, the unwinding roll 23 is obtained by winding a belt-like film 50 into a roll shape, and the winding roll 24 is obtained by winding the remaining film into a roll shape. In this case, the film 50 is unwound from the unwinding roll 23, guided by a plurality of guide rollers 25 arranged in the middle, and a part of the film 50 is stuck to the container 40, and then becomes a remaining film and wound up. It is wound up by a roll 24.

  The belt-like film 50 may be made of an unstretched film having elasticity, such as non-axially stretched polypropylene (CPP), unstretched nylon, or a laminate of nylon and polypropylene. The film 50 may be pre-printed with patterns, characters, designs, etc., or may be plain. In any case, the alignment mark (register mark) is not given to the film 50 in the state of being wound around the unwinding roll 23.

  A tension controller (dancing bar) 33 for adjusting the tension of the film 50 is disposed downstream of the unwinding roll 23 in the transport direction D. The tension controller 33 is movable in the vertical direction. By adjusting the vertical position of the tension controller 33, the tension of the film 50 is kept substantially constant.

  On the downstream side of the tension controller 33 in the transfer direction D, the mark applying unit 13 is provided. The mark applying unit 13 applies alignment marks (register marks) M at a predetermined interval S to the film 50 transferred by the film transfer unit 12. That is, the mark imparting unit 13 has a distance meter (not shown), and has a function of printing the alignment mark M at every predetermined interval S while measuring the transport distance of the film 50 by this distance meter. The mark applying unit 13 may include a printer for printing the alignment mark M, such as an ink jet printer, a thermal printer, or a laser printer. The alignment mark M may be provided on either the front or back surface of the film 50.

  As shown in FIG. 2, the alignment mark M is provided at one end in the width direction of the film 50. The alignment mark M is regularly printed at predetermined intervals S along the length direction of the film 50. The alignment mark M is provided at a location that has a certain positional relationship with the container 40. In this Embodiment, the alignment mark M is provided in the position used as the center part of the container 40 hold | maintained at the container holding part 29 (after-mentioned) of the film sticking part 15, respectively.

  Referring to FIG. 1 again, a corona treatment unit 27 is provided on the downstream side in the transfer direction D of the mark applying unit 13. The corona treatment part 27 corona-treats beforehand the location where the label L (refer FIG. 2) is stuck by the label sticking part 26 mentioned later among the films 50. FIG. With this corona treatment section 27, a part of the surface of the film 50 is modified by corona discharge treatment, and the wettability of this portion is improved, thereby making it possible to easily attach the label L. The region of the film 50 that is corona-treated by the corona treatment unit 27 may extend continuously in a strip shape along the longitudinal direction of the film 50. Alternatively, a plurality of corona-treated regions may be intermittently arranged in the form of dots, for example, along the longitudinal direction of the film 50. In addition, the corona treatment part 27 should just be provided in the any position between the unwinding roll 23 and the label sticking part 26, and is not limited to the location shown in FIG.

  A mark detection unit 14 is provided on the downstream side in the transfer direction D of the mark applying unit 13 and the corona processing unit 27. The mark detection unit 14 detects the alignment mark M provided on the film 50 by the mark application unit 13. The mark detection unit 14 may be any unit that can detect the presence or absence of the alignment mark M, and may be, for example, a transmissive sensor, a reflective sensor, a photoelectric tube, or the like.

  In the present embodiment, the transfer of the film 50 is stopped in response to the mark detection unit 14 detecting the alignment mark M on the film 50. In this case, when the mark detection unit 14 detects the alignment mark M after the film 50 is conveyed for a specified length, the transfer of the film 50 is immediately stopped. Alternatively, the conveyance of the film 50 is immediately stopped when the mark detection unit 14 detects the alignment mark M a specified number of times. When the transfer of the film 50 is stopped, the film 50 is stuck to the container 40 by the film sticking unit 15 as described later.

  On the downstream side of the mark detection unit 14 and the upstream side of the film sticking unit 15, a label sticking unit 26 for sticking the label L to the film 50 is provided. In this label sticking part 26, the label L is stuck to the predetermined position on the film 50 at a fixed interval. The label L may be attached to the moving film 50, or may be attached to the film 50 that is stopped when the mark detection unit 14 detects the alignment mark M. Moreover, it is preferable to make the sticking position of the label L into the area | region where the corona treatment part 27 mentioned above performed the corona treatment. The label L is not particularly limited as long as it is attached to the surface of the film 50, such as a barcode, and exhibits a predetermined function related to the film-equipped container 60 or the contents 41.

  In addition, when it is not necessary to stick the label L to the film 50, the corona treatment part 27 and the label sticking part 26 do not necessarily need to be provided.

  The film sticking unit 15 is provided on the downstream side in the transfer direction D of the mark detection unit 14. The film sticking part 15 sticks the film 50 with respect to the container 40 supplied by the container supply part 11. The film sticking unit 15 includes a seal head 28 and a container holding unit 29 provided at a position facing the seal head 28 (below the seal head 28). A plurality (three in FIG. 1) of the seal head 28 and the container holding portion 29 are provided according to the number of containers 40 to be sealed at a time. The intervals between the plurality of seal heads 28 and the intervals between the plurality of container holding portions 29 are the same as the intervals S between the alignment marks M described above.

  The seal head 28 attaches (thermally welds) the film 50 to the periphery of the opening of the container 40 by bringing the film 50 into contact with the container 40 and heating a part of the film 50. The plurality of seal heads 28 are held by a head driving unit 31 and can be moved up and down with respect to the container holding unit 29.

  Moreover, the container holding | maintenance part 29 hold | maintains the container 40 conveyed from the servomotor conveyor 17 by the container transfer arm 22, respectively. Each container holding part 29 has a frame-shaped part corresponding to the outline of the container 40, and each container 40 can be lifted while being accommodated in the frame and positioned at a predetermined position. The plurality of container holding portions 29 are held by a fixed component 32 and can be pushed up and down against the seal head 28. The container holding part 29 can be raised and lowered with respect to the fixed part 32, and lifts the container 40 by raising from the fixed part 32.

  When the seal head 28 is lowered by the head driving unit 31, the container holding unit 29 is raised. At this time, the film 50 is pressed downward, and the film 50 contacts the container 40 on the container holding part 29. At this time, the film 50 is thermally welded to the periphery of the opening of the container 40 by heat from the seal head 28. Further, the seal head 28 has a punched portion such as a cutter. As the seal head 28 is lowered, the film 50 is punched to form a lid film 51 corresponding to each container 40. .

Incidentally, in FIG. 1, a position where the alignment mark M is detected by the mark detecting unit 14 and the detection position P _1, the position where the film 50 is bonded by a film adhesive portion 15 and the attaching position P _2. In this case, the distance A between the detection position P ₁ and the sticking position P ₂ along the transfer direction D of the film 50 is an integral multiple of the interval S between the alignment marks M. Specifically, in FIG. 1, the distance A between the detection position P ₁ and the sticking position (sticking position of the container 40 located on the most upstream side) P ₂ is 5 of the interval S of the alignment mark M. Doubled (A = 5S). Thus, when the mark detection unit 14 detects the alignment mark M and immediately stops the transfer of the film 50, the other alignment mark M is correctly positioned at the center of the container 40 on the container holding unit 29. It is like that. As a result, the positional relationship between the container 40 and the label L does not shift.

  In addition, the grouping conveyor 20 mentioned above, the 1st stopper 18, the 2nd stopper 19, the container transfer arm 22, the unwinding roll 23, the winding roll 24, the tension controller 33, the mark provision part 13, the corona treatment part 27, The mark detection unit 14, the label sticking unit 26, and the film sticking unit 15 are each connected to the control unit 30. Operations of these elements are controlled by the control unit 30. The control unit 30 is a computer, for example, and has a storage unit (not shown). The storage unit stores a program for controlling various operations executed in the container sealing device 10. The operation of each element described above is not limited to one control unit 30 and may be controlled by a plurality of control units.

  Next, the operation (container sealing method) of the present embodiment having such a configuration will be described with reference to FIG. In addition, each following process is performed when the control part 30 controls each element which comprises the container sealing apparatus 10. FIG.

  First, a plurality of containers 40 each storing contents 41 such as food are supplied to the inverter conveyor 16 of the container supply unit 11 from a previous process (not shown). The plurality of containers 40 are conveyed at indefinite intervals on the inverter conveyor 16. The plurality of containers 40 conveyed on the inverter conveyor 16 come into contact with the first stopper 18 and stop in a line. During this time, the inverter conveyor 16 is continuously driven.

  Subsequently, the first stopper 18 is opened, and the first container 40 passes between the first stoppers 18. At this time, the second stopper 19 is closed, and the first container 40 comes into contact with the second stopper 19 and stops. Thereafter, the first stopper 18 is closed.

  Next, the second stopper 19 is opened, and the servo motor conveyor 17 that has been stopped starts to drive. As a result, the first container 40 is sent from the inverter conveyor 16 to the servo motor conveyor 17. The first container 40 is conveyed toward the downstream side (right side in FIG. 1) on the servo motor conveyor 17. Thereafter, the sensor 21 detects the first container 40 and the servo motor conveyor 17 stops.

  Note that the second stopper 19 is closed after the first container 40 has passed. Thereafter, in the same manner as described above, the second container 40 stands by in a state where it is in contact with the second stopper 19 on the inverter conveyor 16.

  Next, the second stopper 19 is opened again, and the servo motor conveyor 17 that has been stopped starts to drive. As a result, the second container 40 is sent from the inverter conveyor 16 to the servo motor conveyor 17. The second container 40 is conveyed toward the downstream side (the right side in FIG. 1) on the servo motor conveyor 17, and when the sensor 21 detects the second container 40, the servo motor conveyor 17 stops. At this time, the first container 40 moves toward the downstream side (right side in FIG. 1) by a predetermined distance on the servo motor conveyor 17. The second stopper 19 is closed after the second container has passed. In this way, a predetermined number (three in FIG. 1) of containers 40 are supplied from the inverter conveyor 16 to the servo motor conveyor 17, and these containers 40 are aligned at equal intervals (interval S) on the servo motor conveyor 17. (Container supply process).

  Subsequently, the plurality of containers 40 aligned at equal intervals on the servo motor conveyor 17 are conveyed by the container transfer arm 22 and supplied to the container holding section 29 of the film sticking section 15. At this time, the spacing S between the containers 40 is maintained.

  On the other hand, the belt-like film 50 is unwound from the unwinding roll 23 of the film transfer unit 12, and this film 50 is intermittently transferred along the transfer direction D (film transfer step). The tension of the film 50 thus transferred is adjusted to be substantially constant by the tension controller 33.

  The film 50 from the unwinding roll 23 is sent to the mark applying unit 13. In this mark provision part 13, the alignment mark M is provided for every predetermined space | interval S with respect to the transferred film 50 (mark provision process). In this case, the mark applying unit 13 continuously measures the transport distance of the film 50 and prints the alignment mark M at every predetermined interval S.

  Subsequently, the film 50 is sent to the corona treatment unit 27. In this corona treatment unit 27, a portion of the transferred film 50 where the label L is stuck is pre-corona treated (corona treatment step). In the corona treatment unit 27, the surface of the film 50 is partially subjected to corona discharge treatment, and the wettability of this part is improved.

Next, the film 50 is sent to the mark detection unit 14 (detection position P ₁ ). The mark detection unit 14 detects the alignment mark M on the transferred film 50 (mark detection step). Thus, when the alignment mark M on the film 50 is detected, the transfer of the film 50 is temporarily stopped. The film 50 may be stopped each time the alignment mark M is detected, or may be stopped every predetermined number of times of detection. In the example of FIG. 1, it stops every three detections. As described above, the distance A between the detection position P ₁ and the sticking position P ₂ is an integral multiple of the spacing S of the alignment mark M. For this reason, the alignment mark M at the sticking position P ₂ of the film sticking part 15 is correctly positioned at the center of the container 40 on the container holding part 29, and the film 50 is stuck to the container 40.

  Thereafter, the transfer of the film 50 is resumed, and the film 50 is sent to the label attaching unit 26. In this label sticking part 26, the label L is stuck to the predetermined position of the transferred film 50 (label sticking process). Note that the label L may be attached to the moving film 50, or may be attached to the film 50 that is stopped when the mark detection unit 14 detects the alignment mark M. good.

Next, the film 50 is sent to the film sticking unit 15. Subsequently, in the upstream mark detection unit 14 (detection position P ₁ ), another alignment mark M is detected, and accordingly, the transfer of the film 50 is temporarily stopped. In the present embodiment, the transfer of the film 50 stops each time the mark detection unit 14 detects a plurality (three in FIG. 1) of alignment marks M. And in the film sticking part 15, the film 50 is stuck with respect to the container 40 supplied from the container supply part 11 (film sticking process). At this time, the plurality of seal heads 28 are lowered by the head driving unit 31, the container holding unit 29 is raised from the fixed component 32, and the container 40 is raised. As a result, the film 50 is in close contact with the container 40, and the film 50 is thermally welded to the container 40 by the heat from the seal head 28. At the same time, the film 50 is punched out by the punching portion of the seal head 28, and the lid film 51 is formed for each container 40. In the film 50, the remaining film other than the portion attached to the container 40 (the lid film 51) is wound and collected by the winding roll 24.

  Thus, the container 60 with a film is produced by the container 40 in which the contents 41 are stored and the lid film 51 that seals the container 40. A plurality of containers 60 with film (for example, three in FIG. 1) are collectively conveyed to the outside by the container transfer arm 22, for example. In this way, the film 50 is intermittently adhered to the container 40 while the film 50 is intermittently transferred along the transfer direction D, and a large number of film-equipped containers 60 are produced.

  As described above, according to the present embodiment, the mark imparting unit 13 imparts the alignment mark M to the film 50 at the predetermined interval S, and the mark detection unit 14 detects the alignment mark M on the film 50. Accordingly, the transfer of the film 50 is stopped, and the film 50 is stuck to the container 40 by the film sticking unit 15.

  As described above, since the alignment mark M is provided immediately before the film 50 is attached to the container 40, even if the film 50 extends due to the production stage of the film 50 or the influence of the tension controller 33, the film There is no possibility that the interval S between the alignment marks M on 50 is shifted or varied. Thereby, the malfunction which the positional relationship of the container 40 and the label L etc. shifts | deviates can be prevented, and the dispersion | variation in the quality of the container 60 with a film can be reduced.

  Further, even when the film 50 extends due to the weight of the tension controller 33, the interval S between the alignment marks M does not shift or vary. For this reason, it is not necessary to adjust the distance S between the alignment marks M in consideration of the extension of the film 50, adjust the weight of the tension controller 33, or adjust the conveyance speed of the film 50.

DESCRIPTION OF SYMBOLS 10 Container seal apparatus 11 Container supply part 12 Film transfer part 13 Mark provision part 14 Mark detection part 15 Film sticking part 16 Inverter conveyor 17 Servo motor conveyor 22 Container transfer arm 23 Unwinding roll 24 Winding roll 26 Label sticking part 27 Corona treatment unit 28 Seal head 29 Container holding unit 30 Control unit 40 Container 41 Contents 50 Film 51 Lid film 60 Container with film

Claims (9)

In a container sealing device for sealing a container with a film,
A container supply unit for supplying the container;
A film transfer section for transferring a belt-shaped film along the transfer direction;
A mark applying unit for applying alignment marks at predetermined intervals to the film transferred by the film transfer unit;
A mark detection unit that is provided on the downstream side in the transfer direction of the mark applying unit and detects the alignment mark on the film;
A film adhering unit that is provided on the downstream side in the transfer direction of the mark detection unit, and that adheres the film to the container supplied by the container supply unit;
The transfer of the film is stopped in response to the mark detecting unit detecting the alignment mark on the film, and the film is attached to the container by the film attaching unit. Container seal device.   The container sealing device according to claim 1, wherein a label sticking part for sticking a label to the film is provided between the mark detection part and the film sticking part.   The container seal according to claim 2, wherein a corona treatment unit that pre-corona-treats a portion of the film where the label is stuck is provided upstream of the label sticking portion in the transfer direction. apparatus.   The film sticking unit has a seal head for sticking the film to the container, and the seal head forms a lid film corresponding to each container by punching the film. The container sealing device according to any one of claims 1 to 3. When the position where the alignment mark is detected by the mark detection unit is a detection position, and the position where the film is attached by the film attachment unit is an attachment position,
5. The distance between the detection position and the sticking position along the transfer direction of the film is an integral multiple of the interval between the alignment marks. The container sealing device as described. In a container sealing method for sealing a container with a film,
A container supply process for supplying the container;
A film transfer step of transferring the belt-shaped film along the transfer direction;
A mark applying step for applying alignment marks at a predetermined interval to the transferred film;
After the mark application step, a mark detection step for detecting the alignment mark on the film;
A film adhering step of adhering the film to the supplied container,
The container sealing method, wherein the transfer of the film is stopped and the film is stuck to the container in response to detecting the alignment mark on the film.   The container sealing method according to claim 6, further comprising a label sticking step of sticking a label to the film.   The container sealing method according to claim 7, further comprising a corona treatment step in which a portion of the film to which the label is attached is corona treated in advance.   The container sealing method according to any one of claims 6 to 8, wherein a lid film corresponding to each container is formed by punching the film in the film sticking step.

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