JP2013173563A - Packaging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an easily openable package with a sack filling machine.SOLUTION: A perforation is continuously formed in a film conveying direction in a film conveying step until the film F is formed cylindrically by drawing out the film F from a film feeding source 30. A longitudinal sealing is performed to form a two-line sealed portion by nipping a perforated forming position at an overlapping portion 14 of the film F. Two cut-outs are formed by spaced out at a predetermined distance to traverse an outer sealed portion formed in the overlapping portion 14. The overlapping portion 14 is overturned to be along an external surface of the cylindrical film F by allowing the film F on the side where the perforation is formed to be inside in the process where the cylindrical film F is conveyed downstream. A horizontal sealing is performed ahead and behind an article on the cylindrical film F, thereby obtaining a package 10.

Description

  The present invention relates to a packaging method for obtaining an easy-open packaging body by a bag making and filling machine.

  Various devices have been devised in order to improve the unsealing properties of packages in which articles such as food are packaged. As such a package, for example, as disclosed in Patent Documents 1 and 2, the longitudinal seal portion where the longitudinal edge portions of the film are overlapped and sealed is provided with two cuts, and a cylindrical shape. A break line intersecting the extension line of the two cuts is formed with respect to the bag body portion of the bag, and the bag can be easily opened by pinching between the two cuts and tearing in the cut forming direction. .

JP-A-9-104449 Japanese Patent No. 3916942

  The conventional package described above is a package using a flat bag in which a half-cut break line formed in the film manufacturing process and two cuts are formed in advance. In order to obtain a packaging body similar to this by a bag making and filling machine, it is necessary to use a packaging film having a half-cut break line at every predetermined interval of a strip-shaped film wound in a roll shape. The use of the film increases the packaging material cost as in the case of the conventional package described above. For this reason, the use of a half-cut break line is not preferable in terms of packaging cost. Also, due to the effects of film elongation and film conveyance accuracy, when forming two cuts after the vertical seal is applied to the overlapped portion of the film, there is a positional deviation from the formation position of the break line provided at every predetermined interval. This may result in a package that cannot be satisfactorily opened.

  The present invention has been proposed to solve these problems in view of the problems related to the prior art described above, and can be easily opened by a bag making and filling machine without impairing sealing performance or opening performance. It aims at providing the packaging method which can obtain favorable.

In order to overcome the above-mentioned problems and achieve the intended purpose, the packaging method of the invention according to claim 1 of the present application is:
A packaging method for obtaining a package in a bag making and filling machine,
In the film conveyance process until the film is drawn out from the film supply source and formed into a cylindrical shape, the perforation is continuously formed toward the film conveyance direction on one side in the width direction of the band-shaped film,
Articles are formed at predetermined intervals in a cylindrical film obtained by forming a strip-like film into a cylindrical shape so that the positions where the perforations are formed are located in the overlapping portion, and by polymerizing the longitudinal edges of the film in a palm-like manner. Supply
An outer seal portion is formed by heating the extended end edge side of the overlapped portion with the first heating surface across the formation position of the perforation in the overlapped portion, and extended at a predetermined interval from the extended end side The base side is heated by the second heating surface, and a vertical seal is applied so as to form two seal portions in the overlapping portion to form an inner seal portion by a weak seal,
Forming two notches spaced a predetermined distance across the outer seal portion formed in the overlapping portion;
In the process of transporting the tubular film to the downstream side, with the one film on the side where the perforation is formed as the inner side, the polymerization part is laid down along the outer surface of the tubular film,
It is characterized in that a lateral seal is applied at the front and rear positions sandwiching the article supplied in the tubular film.
According to the first aspect of the present invention, the bag forming and filling machine is provided with a sealing body and a good opening property without causing a gap between the formation position of the perforation and the formation position of the cut and affecting the opening property. Can be easily obtained.

The invention according to claim 2 is characterized in that the inner seal portion is heated on the second heating surface having a narrow width so as to be narrow and is subjected to a vertical seal.
According to the invention which concerns on Claim 2, the package body provided with the favorable openability which can be peeled smoothly, without applying strong tearing force to an inner seal part is obtained.

The invention according to claim 3 is characterized in that the outer seal portion is heated by the first heating surface having a large width so as to be wide and is subjected to a vertical seal.
According to the invention which concerns on Claim 3, since the intensity | strength increases as the film of 2 sheets between notches as a pick piece, the package which can tear an opening part smoothly is obtained.

The invention according to claim 4 is characterized in that when the vertical seal is applied, the outer seal portion and the inner seal portion are formed simultaneously.
According to the invention of claim 4, two vertical seals are simultaneously applied, and the perforation is positioned between the first heating surface and the second heating surface so that the film is superposed and the vertical seal is applied. Therefore, the formation position of the perforation can be reliably positioned in the non-seal portion formed between the first heating surface and the second heating surface.

The invention according to claim 5 is characterized in that both ear portions at the front and rear end portions of the laterally sealed bag are folded and attached to the surface of the bag so that the overlapping portion is located inside.
According to the invention which concerns on Claim 5, when picking the picking piece formed between two notches and starting tearing, a package body with which an opening part cannot lift easily can be obtained, and the openability of a package body is made favorable. obtain.

In the invention which concerns on Claim 6, the superposition | polymerization position of the said film shifted | deviated to the side so that the extension edge of the superposition | polymerization part which fell along with a cylindrical film might face one side edge vicinity of the width direction of a cylindrical film. The film is formed into a cylindrical shape so as to be positioned.
According to the invention which concerns on Claim 6, the packaging body provided with favorable openability similarly to the invention which concerns on Claim 5 can be obtained.

The invention according to claim 7 is characterized in that the position of the edge of each film overlapping at the overlapping portion is detected, and the package obtained by the positional deviation of the edge is discharged out of the system.
According to the invention which concerns on Claim 7, mixing of the packaging defect goods can be prevented beforehand.

  According to the packaging method according to the present invention, when an easy-open packaging body sealed by a bag making and filling machine is obtained, the opening portion can be easily and reliably formed.

It is explanatory drawing which shows schematically the bag making filling machine which implements the packaging method which concerns on the suitable Example of this invention. It is a schematic plan view which shows the conveying apparatus connected to the downstream of the bag making filling machine of an Example. It is a schematic explanatory drawing which shows the perforation formation means of an Example. It is the schematic explanatory drawing fractured | ruptured by the AA line of FIG. It is a schematic perspective view which shows the vertical sealing means of an Example. (a) is the schematic explanatory drawing fractured | ruptured by the BB line of FIG. 1, (b) is the schematic explanatory drawing fractured | ruptured by the CC line of (a). It is a schematic front view which shows the sticking means of an Example. It is a schematic front view which shows the discharge means of an Example. It is a schematic perspective view which shows the package obtained by the packaging method of an Example, (a) is the state before opening, (b) shows the state opened partially.

  Next, the packaging method according to the present invention will be described below with reference to the accompanying drawings by way of preferred examples.

  As shown in FIG. 1, in a horizontal bag making and filling machine as a bag making and filling machine capable of carrying out the packaging method according to the present invention, a belt-like film F drawn from a film supply source 30 is cylindrically formed by a bag making means 32. In the film transporting process until it is formed into a film, perforations 26 are continuously formed on the film F by the perforation forming means 34 in the film transport direction. As shown in FIG. 3, the perforation forming unit 34 includes a rotating blade 36 that continuously rotates with a plurality of protruding blade portions 36 a at the periphery, and a receiving roller 38 that is disposed so as to be opposed to the rotating blade 36 so as to be pressed. The perforation 26 is continuously formed in the width direction of the strip-shaped film F passing between the rotary blade 36 and the receiving roller 38 by the rotary blade 36 in the film conveying direction. In this example, as the film F, a double-sided heat-weldable film having a thickness of 25 μm in which biaxially stretched polypropylene is subjected to aluminum vapor deposition and coated with a heat-sealable resin on both sides is suitably used.

  The belt-like film F in which the perforations 26 are formed is guided by a plurality of guide rollers 39 to reach the bag making means 32. The film F is formed into a cylindrical shape and the longitudinal edge of the film F is a palm shape. The articles G are supplied to the cylindrical film F at predetermined intervals while being polymerized. When the overlapping portion 14 polymerized in the shape of a palm by the bag making means 32 falls down along the tubular film F, the extending edge of the overlapping portion 14 is near one side edge in the width direction of the tubular film F. The cylindrical film F is formed so as to extend vertically downward at a position close to one side edge in the width direction of the cylindrical film F. As shown in FIG. 1, a vertical sealing means 40 is provided that heats the superposed portion 14 of the film F and performs vertical sealing while being spaced downstream of the bag making means 32 in the film transport direction. In addition, a pair of first feed rollers 44 and 44 and a pair of second feed rollers 46 and 46 are disposed at positions spaced apart by a predetermined distance in the front and rear direction of the film with the vertical seal means 40 interposed therebetween. The cylindrical film F filled with the articles G at predetermined intervals is supported at its lower surface, and the overlapping portion 14 extending downward is sandwiched between the first feed rollers 44 and 44 and the second feed rollers 46 and 46. Thus, the cylindrical film F is continuously conveyed.

  As shown in FIG. 5, the vertical sealing means 40 is composed of a first sealing roller 41 and a second sealing roller 42 which are disposed so as to be rotatable about a vertical axis with their circumferential surfaces facing each other. The first seal roller 41 and the second seal roller 42 sandwich the overlapped portion 14 of the film F to perform vertical sealing. Here, the inner seal portion 20 is formed on the extending base side of the overlapping portion 14, and the outer seal portion 18 is formed on the extending end edge side of the overlapping portion 14. The extended base side is heated by a second heating surface (second heating surface) 41c on the upper side of the first seal roller 41, and the extended edge side of the overlapping portion 14 is in the first seal roller 41. The second heating surface 41c is heated by a first heating surface (first heating surface) 41b that is spaced downward with a recess 41a. The film F is drawn into a space 41c between the first heating surface 41b and the second heating surface 41c so as to face the perforation 26, and is formed into a cylindrical shape and polymerized into a palm shape. Of the two seal portions, at least the inner seal portion 20 is subjected to a vertical seal so as to be an easily peelable weak seal having a small peel resistance. The first heating surface 41b is formed wider than the second heating surface 41c. Therefore, the inner seal portion 20 is formed narrower than the outer seal portion 18. Further, the film F is superposed so that the perforation 26 is disposed at a position close to the second heating surface 41c side in the recess 41a, and the superposition part 14 is vertically sealed. In this example, the first seal roller 41 is composed of a first heating surface 41b having a width of 4 mm and a second heating surface 41c having a width of 1 mm across a recess 41a having a width of 3 mm. The film F is made of a material having a large temperature dependency of the seal strength, such as various sealants having a characteristic that the seal strength is weak by the low temperature seal and the seal strength is high by the high temperature seal. The heating temperature of the seal or the heating temperature of the horizontal seal described later can be lowered to make the seal weak.

  A notch forming means 50 is disposed spaced apart downstream of the vertical sealing means 40 in the film transport direction. As shown in FIG. 6, the notch forming means 50 includes a notch roller 51 having a pair of cutting edges 51 a, 51 a arranged at predetermined intervals on the periphery, and a pressure receiving roller 52, around the vertical axis. The overlapping portion 14 passes between the rotating cutting roller 51 and the pressure receiving roller 52. The notch forming means 50 controls the notch motor 53 made of a servo motor to rotate and rotates the notch roller 51, whereby the film F for one packaging length is conveyed by both the cutting edges 51a and 51a. Each time, two ends intersecting the film transport direction so as to cross the outer seal portion 18 with a length from the extended end edge of the overlapping portion 14 to the vicinity of the inner edge of the formation width of the outer seal portion 18. Cuts 24, 24 are formed. The formation interval of both cuts 24, 24 can be formed at about 20 mm, which is a suitable interval for picking and tearing the tab 25 formed between the cuts 24, 24 with the fingers when the package 10 is opened. It is preferable that a separation angle between the paired cutting blades 51a and 51 is set. In the cutting roller 51 of the embodiment, two pairs of cutting blades 51 a and 51 a are arranged at equal angles in the circumferential direction of the cutting roller 51. By forming the cuts 24 and 24 in this way, the position at which the perforation 26 can intersect the extension line of the end portions of the cuts 24 and 24 toward the extended base in the overlapping portion 14. To face.

  In the process of being conveyed downstream through the second feed roller 46, the overlapping portion 14 is laid down along the outer surface of the tubular film F with one film F having the perforation 26 formed inside, The extended end faces the vicinity of one side edge in the width direction of the tubular film F. Then, on the downstream side of the transport of the tubular film F, the lateral seal means 54 performs a lateral seal on the tubular film F to form and cut the lateral seal portion 16. Further, the side surface of the tubular film F is pushed inward prior to the horizontal seal by the gusset forming means 56 having the gusset forming member 57 upstream and downstream of the horizontal seal formation position. The horizontal sealing means 54 is composed of a pair of heating seal bodies 55, 55 disposed across the conveyance path of the tubular film F, and both the heating seal bodies 55, 55 advance synchronously and are separated from each other. A so-called box motion type is employed that repeats the movement of moving forward while approaching each other after retreating, and sandwiching the tubular film F between the heating seal bodies 55 and 55 at the front and back positions of the article G in the tubular film F. In this sandwiched state, it moves forward at the same speed as the speed of the tubular film F to provide a lateral seal, and is cut by a cutter built in the heating seal body 55 so as to cross the tubular film F. The package 10 can be obtained.

  In the package 10 obtained in this way, the ears 15 where the lateral seal portions 16 are formed extend at the front and rear ends of the bag, respectively, and the intermediate conveyor from the transfer conveyor 58 on the downstream side of the lateral seal means 56. 60 and conveyed in a direction crossing the transfer conveyor 58. The package 10 pushed and transferred by the pusher 59 to the transport conveyor 61 arranged in parallel with the intermediate conveyor 60 is superposed on the ear 15 by the ear sticking means 62 during the transport by the transport conveyor 61. It is bent so that the portion 14 is inward, and is welded and attached to the front and rear surfaces of the bag. As shown in FIG. 2, two ear part pasting means 62, 62 are arranged in the front and rear directions in the transport direction by the transport conveyor 61, and one and the other of the ear parts 15 are respectively connected to each ear part pasting means 62. Folded and pasted. As shown in FIG. 7, the ear | edge part sticking means 62 is arrange | positioned in the outer side of the conveyance path of the conveyance conveyor 61, and supports each package 10 in the conveyance direction back and forth from each division part 61a to right and left. An affixing tool 63 provided with a heating block for folding and attaching one of the extending ears 15, and the affixing ear 63 on the opposite side of the packaging 10 with respect to the affixing tool 63. It has the receiving tool 66 which supports the bag on the opposite side from the side. In addition, an upper guide 68 that prevents the package 10 supported by each partition 61a from being lifted is provided along with the operation of bending and pasting the ear 15 by each ear pasting means 62. The affixing tool 63 can be moved back and forth with respect to the package 10 that has arrived at the ear part affixing position by means of the advancing / retracting cylinder 64, and can be moved up and down by the elevating cylinder 65. The receiver 66 is moved forward and backward by the receiver advance / retreat cylinder 67 with respect to the package 10 that has arrived at the ear paste position, and is supported via the spring 69, and the ear paste means 62 on the upstream side of the transport conveyor 61. In this case, one side of the bag can be elastically held by the receiving pieces 66a and 66a with the ear portion 15 facing between the pair of receiving pieces 66a and 66a spaced apart from each other. When the package 10 arrives at the ear attaching position, one side is supported by the advance receiving tool 66, and the other ear 15 is softened and bent downward by the heat of the attaching tool 63 descending from above. After that, the ear part 15 is pressed against the surface of the other side by the advancing sticking tool 63, and the ear part 15 is heated on the surface of the bag by heat melting of the heat-sealable resin coated on the surface of the film F. Welded. Thereby, the ear | edge part 15 will be stuck on each end surface of a bag, and will be in the state extended up and down.

  The package 10 with the ears 15 attached in this way is transported to the downstream side of the transport conveyor 61 in a state where both end surfaces are supported by a pair of belts 78, 78 disposed on both sides of the transport conveyor 61. Then, the defective packaging product is discharged from the conveyor 61 by the discharging means 70 provided in the defective product discharge section. As shown in FIG. 4, in order to detect defective packaging, a deviation in the polymerization state of the polymerization edge in the polymerization section 14 is detected in the packaging process of the bag making and filling machine. By the detecting means 74 disposed between the rollers 44 and 44 and the vertical sealing means 40, the amount of protrusion of either overlapping edge is greater than or equal to the specified amount with respect to the change in the overlapping state of the overlapping portion 14 extending downward. It is configured so that it can be detected by the sensor. As shown in FIG. 8, the discharge means 70 removes the package 10 from the conveyor 61 at the timing when a defective package such as the package 10 in which the misalignment of the overlapping section 14 is detected arrives at the defective product discharge section. It is sent out by discharge pieces 72 to discharge conveyors 76 arranged side by side. In general, the deviation of the overlapping portion 14 is continued for a predetermined period. Therefore, in the case of defective packaging caused by the deviation of the overlapping state of the film F, a plurality of packaging bodies 10 are continuously arranged. Discharged outside.

  As shown in FIG. 9, the vertical seal portion of the package 10 obtained in this way is welded between the outer seal portion 18, the inner seal portion 20, and the two seal portions 18, 20. A non-sealed portion 22 is formed, and a perforation 26 is formed on one film F in the non-sealed portion 22 along the two seal portions 18 and 20. Thus, even if the perforation 26 is continuously formed by the perforation forming means 34, the perforation 26 is disposed on one film F of the non-seal portion 22 facing the outside of the inner seal portion 20. The package 10 sealed by the portion 20 does not lose its sealing performance.

  As shown in FIG. 9 (b), when the package 10 is opened, when the tab 25 is picked with a fingertip and pulled in the width direction of the bag body 12, a tear is induced from the end portions of both cuts 24,24. The guide end intersects with the perforation 26, and only the film F that is polymerized upward between the guide ends is broken along the perforation 26, and the inner seal portion 20 that is a weak seal is peeled off. The tearing by the guide end portion proceeds in a direction crossing the inner seal portion 20, so that the bag body portion 12 can be opened in a belt shape in the circumferential direction. Here, since both ears 15 and 15 are bent and attached to the surfaces on both sides of the bag, both ends in the length direction of the outer seal portion 18 and the inner seal portion 20 are held when tearing at the time of opening. Thus, the outer seal portion 18 and the inner seal portion 20 can be prevented from floating, and the package 10 can be opened well. In addition, since the overlapping portion 14 is formed so that its extended end is in the vicinity of one side edge in the width direction of the bag body portion 12, when tearing at the time of opening, the outer seal portion 18 and the inner seal portion 20 Lifting can be prevented. The inner seal portion 20 is weakly sealed by the vertical seal means 40, and is formed as a narrow seal portion by the vertical seal means 40 including the first seal roller 41 in which the width of the second heating surface 41c is set to be narrow. Therefore, when tearing at the time of opening, the guide end portion of the notch 24 is smoothly prevented from peeling when the guide end portion of the notch 24 crosses the inner seal portion 20 and can be opened well. Moreover, since the outer seal part 18 obtained by carrying out the vertical seal | sticker by the 1st heating surface 41b which is the wide heating surface of the 1st seal | sticker roller 41 is provided, two films superposed | polymerized between the incisions 24 and 24 The strength of the knob 25 by F increases, and tearing at the time of opening can be performed smoothly. In addition, since the biaxially stretched polypropylene film used in this example has a characteristic of being easily torn, it is preferable because it improves the opening property of the package 10.

  According to the packaging method described above, the perforations 26 can be continuously formed by the rotary blade 36 in the film conveyance process of conveying the film F in the bag making and filling machine. Further, two vertical seals are simultaneously applied by the sealing roller 41 having the wide first heating surface 41b and the narrow second heating surface 41c, and the perforations 26 formed by the perforation forming means 34 are first heated. Since the film F is superposed and positioned in the recess 41a between the surface 41b and the second heating surface 41c, the perforations 26 are formed in the non-seal portion 22 obtained by the recess 41a. The position can be reliably positioned. Further, since the perforation 26 is continuously formed between the lateral seal portions 16 and 16 in the non-seal portion 22, the both incisions formed toward the extending base portion by the incision forming means 50 in the overlapping portion 14. The perforations 26 can be surely arranged at positions where the perforations 26 can intersect on the extended lines from the terminal ends of 24 and 24. Further, since the perforations 26 formed by the perforation forming means 34 are continuously formed in the film conveying direction, the position where the notches 24 and 24 are formed by the notch forming means 50 after the vertical seal is applied is shifted. Even if it occurs, the perforation 26 can be reliably positioned on the extension line of the notches 24 and 24. In this way, the packaging body 10 having a sealing property and a good unsealing property can be easily obtained by the bag making and filling machine without affecting the unsealing property of the packaging body 10. It should be noted that the position of the overlapping edge of the film F overlapped by the overlapping portion 14 is detected by the detecting means 74, and the positional deviation of the edge portion occurs, and the arrangement of the perforation 26 and the notch 24 and the notch length of the notch 24 are determined. When it is determined that the packaging body 10 that is a defective packaging product is discharged due to the change, the discharging device 70 discharges the packaging body 10 that is a defective packaging product out of the system when it reaches the discharging device. Therefore, when the film F which overlaps in the superposition | polymerization part 14 shifts | deviates, the formation position of the perforation 26 is displaced out of the range of the non-seal part 22 in the two seal parts 18 and 20, or the notch formation means 50 It is possible to prevent a defective package that is expected to be unsealed from being mixed in a non-defective product due to factors such as a shortage of the cuts 24 and 24 due to.

(Change example)
The present invention is not limited to the configuration of the embodiment, and can be modified as follows, for example. Further, not limited to the following modification examples, various embodiments may be adopted for the configurations described in the examples within the scope of the gist of the present invention.
(1) As long as the film F is a film that does not hinder the progress of tearing when tearing from the notch 24, as in this example, a heat-weldable film obtained by depositing aluminum on biaxially stretched polypropylene or biaxially stretched. Composites in which biaxially stretched films such as heat-weldable films with aluminum deposited on polyester, laminated films of uniaxially stretched films and adhesive layers made of various heat-sealable resins, and films made of various other materials are laminated. Various films such as films and various laminated films in which aluminum foil or Japanese paper is laminated can be adopted.
(2) The position of the perforation forming line in the non-sealed portion 22 of the package can be dealt with by adjusting the formation position of the perforation 26 by the perforation forming means 34 of the belt-like film in the width direction.
(3) The width of each of the two vertical seals formed by the vertical seal means 40 and the spacing between the seal portions 18 and 20 are not limited to the relationship in the embodiment, and the first seal roller of the vertical seal means 40 The width can be changed as appropriate by changing the width of the recess 41a and the heating surfaces 41b and 41c.
(4) The vertical sealing means is provided with the first and second heating surfaces 41b and 41c on one seal roller 41, but instead of the seal roller, it is sandwiched and welded by the seal bar when the film F is intermittently stopped. Various other known embodiments such as a configuration and a configuration in which the overlapping portion 14 is passed through the gap between the pair of seal blocks to form the welded portion can be employed.
(5) In the two vertical seals, only the vertical seal applied to the extended base side of the overlapped portion 14 may be a weak seal, and as the vertical seal on the extended edge side of the overlapped portion 14, a seal having high peel resistance May be applied. Using a film made of a material having a high temperature dependency of the seal strength, a single vertical seal is applied to the extended edge side of the overlapping portion 14 at a high heating temperature by a seal roller, a seal bar, etc., and another seal roller or seal By applying a single vertical seal to the extended base side of the overlapping portion 14 at a low heating temperature with a bar or the like, an outer seal portion 18 having high peel resistance is formed on the extended end side, and on the extended base side. The easily peelable inner seal portion 20 can be formed. As a result, when the knob 25 formed between the cuts 24 and 24 is picked and torn, there is no possibility that the knob 25 overlapped by the outer seal portion 18 will be excessively separated, and a better opening is performed. obtain.
(6) As the cutting blade of the cutting roller, the cut formed may be an intermittent perforated cut by using a plurality of protruding blade portions arranged in a direction intersecting the circumferential direction. In this way, the notch 24 is not limited to a straight line but may be formed by a cutting blade that can form other shapes as long as the unsealing property is not impaired when the knob 25 is picked and opened. Can do.
(7) The notch forming means 50 is not limited to the rotary type including the roller 51 as in the embodiment, and the knife is advanced and retracted toward the film F in accordance with the film conveyance pause in the mode of intermittently conveying the film F. Various embodiments can be employed, such as a configuration in which the cut 24 is formed, or a configuration in which the knife is moved forward and backward toward the film F to form the cut 24 while moving the knife together with the film F.
(8) The notch 24 may be formed up to the position reaching the non-seal portion 22 beyond the inner edge of the outer seal portion 18. Thereby, although the sealing degree by the outer seal part 18 falls, sealing property is not impaired by the inner seal part 20, and unsealing property can be improved.
(9) It is good also as the package body 10 in which the ear | edge part 15 has extended without folding the ear | edge part 15 of a bag and sticking it on the surface of a bag. That is, in the case where the film is thick or the film is strong such as aluminum foil laminate or Japanese paper laminate, the film has shape retaining property when the film is opened, and the seal portions 18 and 20 are not easily lifted. The step of attaching the ear 15 to the surface of the bag may be omitted when adopting.
(10) In the embodiment, after the lateral seal is applied, the ear portion 15 is folded and attached to the surface of the bag. However, the ear portion 15 is bent simultaneously with the lateral seal or laterally. The ear portion 15 may be bent and pasted at a position immediately after sealing.
(11) Although the horizontal bag making and filling machine has been described as an example in the embodiments, the present invention can also be applied to a vertical bag making and filling machine and other various bag making and filling machines.

10 packaging body, 14 overlapping part, 15 ear part, 16 side seal part, 18 outer seal part,
20 inner seal part, 22 non-seal part, 24 notches, 26 perforations,
30 Film source, G article, F film

Claims (7)

A packaging method for obtaining a package (10) in a bag making and filling machine,
In the film conveyance process from drawing from the film supply source (30) to forming the film (F) into a cylindrical shape, the perforation (26) is directed toward the film conveyance direction on one side in the width direction of the belt-like film (F). Continuously forming,
The belt-like film (F) is formed in a cylindrical shape so that the position where the perforation (26) is formed is located in the overlapping portion (14), and the longitudinal edge portion of the film (F) is polymerized in a palm shape. Supply the articles (G) at predetermined intervals in the obtained tubular film (F),
The outer seal portion (18) is formed by heating the extending edge side of the overlapping portion (14) with the first heating surface (41b) with the formation position of the perforation (26) in the overlapping portion (14). Further, the overlapping base portion 14 is heated to form the inner seal portion 20 with a weak seal by heating the extended base side spaced apart from the extended end edge side by a predetermined distance with the second heating surface 41c. A vertical seal is applied to form two strips of seals,
Forming two incisions (24, 24) separated by a predetermined distance so as to cross the outer seal portion (18) formed in the overlapping portion (14);
In the process of transporting the tubular film (F) to the downstream side, the polymerization portion (14) of the tubular film (F) is formed with the one film (F) on the side where the perforation (26) is formed inside. Lying down along the outer surface,
A packaging method characterized in that a lateral seal is applied at the front and back positions sandwiching the article (G) supplied in the tubular film (F).   The packaging method according to claim 1, wherein the inner seal portion (20) is heated by the second heating surface (41c) having a narrow width so as to be narrow.   The packaging method according to claim 1 or 2, wherein the outer seal portion (18) is heated by the wide first heating surface (41b) so as to be wide and is subjected to a vertical seal.   The packaging method according to any one of claims 1 to 3, wherein when the vertical seal is applied, the outer seal portion (18) and the inner seal portion (20) are formed simultaneously. .   The both ears (15, 15) at the front and rear ends of the laterally sealed bag are folded so that the overlapping portion (14) is located inside and attached to the surface of the bag. The packaging method as described in any one of 1-4.   The polymerization position of the film (F) is on the side so that the extended edge of the overlapping portion (14) that falls along the cylindrical film (F) faces the one side edge in the width direction of the cylindrical film (F). The packaging method according to any one of claims 1 to 5, wherein the film (F) is formed into a cylindrical shape so that the position is closer to the direction.   The position of the edge of each film (F) that overlaps in the overlapping portion (14) is detected, and the package (10) obtained by the displacement of the edge is discharged out of the system. Item 7. The packaging method according to any one of Items 1 to 6.

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