JP2007197033A - Method for manufacturing packaging unit, apparatus for manufacturing packaging unit and packaging sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a packaging unit showing a superior productivity and facilitating a taking-out a packaged object, an apparatus for manufacturing the packaging unit, and a packaging sheet. <P>SOLUTION: A packaging sheet S is wound around the outer periphery of a cylinder 30 in a cylindrical manner, its seam lines are welded in a vertical direction by a vertical sealer 32, an object to be packaged is fed from the cylinder 30 into the packaging sheet S as the lower end of the packaging sheet S remains melted to adhere by a lateral sealer 36, thereafter the packaging sheet is pulled down by a predetermined size with sheet drawing means, a predetermined location of the packaging sheet is welded in a lateral direction by the lateral sealer to enclose the object to be packaged. Then, when the packaging sheet S is welded by the lateral sealer 36, a folding plate 35 is pushed into the sheet every time, one portion where the sheet is welded with folding lines 2 being formed on both sides of the packaging sheet S and the other portion where the sheet is welded with folding lines 2 being not formed on both sides of the packaging sheet S are formed alternatively. As a result, the packaging unit 1 having folding lines 2 at one portion and having no folding lines 2 at the other portion can be manufactured continuously under a superior productivity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a package filled with, for example, confectionery, processed food, agricultural products, etc., a package manufacturing apparatus, and a packaging sheet.

  Conventionally, a package filled with confectionery or the like has been manufactured by a so-called vertical pillow packaging machine. In Patent Document 1 below, a belt-shaped film material is wound around a bag-making tube in a cylindrical shape, and a seam is vertically sealed to form a cylinder, and then the cylinder is pulled downward and arranged below the bag-making tube. A pair of provided triangular folding guides are inserted from both sides of the cylinder to form a crease, and then the bottom bottom of the cylinder is laterally sealed, and then confectionery is dropped from the bag-making tube and filled. In addition, a manufacturing method of a package body in which an upper opening portion of a cylindrical body is laterally sealed and filled with confectionery or the like is disclosed.

  The triangular folding guide is set so as to be pushed into the cylindrical body before the cylindrical body is laterally sealed. Further, in conjunction with the operation of the triangular folding guide, there is provided a vertical guide that enters both sides of the cylinder in which the fold is formed.

Moreover, although it is not based on a vertical pillow packaging machine, in Patent Document 2 below, the side surface of the cylindrical flexible film is folded inward to form a gusset, and the bottom is welded to form a gusset bag. And it is disclosed that a confectionery etc. is filled there, and a package body is manufactured by welding an upper end part after that.
JP 2003-200908 A Japanese Patent Laid-Open No. 9-30536

  In the case of the above-mentioned Patent Document 1, the triangular folding guide is projected before the lower bottom portion and the upper opening of the cylinder are laterally sealed, that is, every time the cylinder is laterally sealed, and the folds are folded up and down on both sides of the cylinder. And a vertical guide enters the crease so that the crease line is clearly noticeable. As a result, creases are made on both sides of the cylinder from the lower end to the upper end. Therefore, when the confectionery or the like is filled in the cylinder, the crease in the lower part is pressed by the confectionery or the like and spreads outward as shown in FIG. 10, but the fold F is still formed in the upper part. Therefore, when opening the upper end of the package and taking out the confectionery, there is a problem that the frontage is narrow and difficult to take out.

  On the other hand, in the above-mentioned Patent Document 2, it is necessary to form a gusset bag in advance and set it in an automatic packaging machine, so there is a problem in productivity.

  Therefore, the objective of this invention is providing the manufacturing method of a package, the manufacturing apparatus of a package, and a packaging sheet which has favorable productivity and can make it easy to take out a to-be-packaged object.

In order to achieve the above-mentioned object, the method for manufacturing a package of the present invention is such that the package sheet supplied by the sheet supply means is formed into a cylindrical shape on the outer periphery of a cylindrical cylinder disposed in the vertical direction via a former. Winding
The seam of the packaging sheet wound around the outer periphery of the cylinder is welded in the vertical direction by a vertical sealer,
In a state where the lower end of the packaging sheet is already welded and sealed by a horizontal sealer, the article to be packaged is introduced from the cylinder, and the article to be packaged is filled into a cylindrically formed packaging sheet,
Before or after the filling, the packaging sheet is pulled downward by a predetermined dimension by the sheet pulling means, and a position to be welded and sealed in order to enclose the article to be packaged by a predetermined distance above the lower end of the packaging sheet In the method for manufacturing a package body in which the package sheet is sealed in the horizontal direction with the horizontal sealer so as to enclose the article to be packaged,
A pair of folding means capable of folding both sides of the packaging sheet is disposed below the cylinder and above or below the horizontal sealer,
When the packaging sheet is welded by the horizontal sealer, the folding means is actuated every other time, a fold is formed on both sides of the packaging sheet, and a portion welded in the lateral direction by the horizontal sealer, and the packaging sheet Instead of forming a crease on both sides of the sheet, portions welded in the horizontal direction by the horizontal sealer are alternately formed.

  According to the above invention, when the packaging sheet is welded in the lateral direction by the transverse sealer, the folding means is operated every other time so that both sides of the packaging sheet are folded. It is possible to continuously produce a package with no productivity.

  When the packaging body obtained in this way stands up with the creased welded portion facing downward, the portion in which the folding means is formed is pressed against the packaged object and spreads outward in a square shape. As a result, a flat surface is formed at the bottom of the package, and the package can be held in an upright state, thereby providing self-supporting properties.

  Moreover, since the opening becomes larger when the welded part where the fold is not formed is opened and the packaged article is taken out, the packaged article can be easily taken out.

  In the manufacturing method of the package of the present invention, it is preferable that the folding means includes a folding plate that is pushed into both sides of the packaging sheet to form a fold. According to this, since the folding plate is inserted into both sides of the packaging sheet, the folds can be surely and clearly formed on both sides of the packaging sheet, and the quality of the package is improved.

  The packaging body manufacturing apparatus of the present invention includes a cylindrical cylinder disposed in a vertical direction into which an article to be packaged is placed, a former that winds a packaging sheet around the outer periphery of the cylinder, and a packaging for the former. A sheet supply means for supplying a sheet, a vertical sealer for welding the seam of the packaging sheet wound around the outer periphery of the cylinder in the longitudinal direction to form the packaging sheet in a cylindrical shape, and the cylinder below the cylinder A pair of folding means disposed on both sides of the packaging sheet formed in a shape, a horizontal sealer that is disposed below or above the folding means, and welds the packaging sheet formed in a cylindrical shape in the lateral direction; And a sheet pulling means for pulling the packaging sheet formed in a cylindrical shape downward by a predetermined dimension, and when the packaging sheet is welded by the horizontal sealer, the folding means is operated every other time for packaging. Characterized in that it is configured to folded on both sides of the over bets.

  According to the above invention, when the opening of the packaging sheet is welded, the folding means is operated every other time so that both sides of the packaging sheet are folded. Thus, it is possible to continuously produce a package without a crease with high productivity.

  In the packaging body manufacturing apparatus of the present invention, it is preferable that the folding means is composed of a pair of folding plates capable of moving back and forth in a direction orthogonal to the axial direction of the cylinder. According to this, since the folding plate is inserted into both sides of the packaging sheet, the folds can be surely and clearly formed on both sides of the packaging sheet, and the quality of the package is improved.

  The packaging sheet of the present invention is a packaging sheet used in the above-described method for producing a packaging body, has a continuous shape in a strip shape, and constitutes one packaging body along the length direction of the packaging sheet. The pattern of the package is printed so as to be alternately reversed, and the mark for detecting the position of the sheet is attached at the same interval as the length of the sheet constituting one package. Features.

  According to the above invention, since the printing is performed so as to be alternately reversed along the length direction of the packaging sheet, when applied as the packaging sheet of the manufacturing method, the bottom portion formed with a crease and sealed On the other hand, it is possible to manufacture a package with a correct printing direction. In addition, since the mark for detecting the position of the sheet is attached at the same interval as the length of the sheet constituting one package, the sheet is accurately determined by the length of the sheet constituting one package. Can be sent out.

  In the packaging sheet of the present invention, the mark is attached with the same interval as the length of the sheet constituting one package, and twice the length of the sheet constituting one package. It is preferable to have the one attached with a gap. According to this, with the marks attached with the same interval as the length of the sheet constituting one package, the sheet can be accurately sent out by the length of the sheet constituting one package, The position at which the folding means is actuated to insert the gusset can be accurately set by the marks provided at intervals of twice the length of the sheet constituting one package.

  According to the present invention, when the packaging sheet is welded in the lateral direction by the transverse sealer, the folding means is operated every other time so that both sides of the packaging sheet are folded. It is possible to continuously produce a package with no productivity. Moreover, since the opening becomes larger when the welded part where the fold is not formed is opened and the packaged article is taken out, the packaged article can be easily taken out.

  Hereinafter, with reference to FIGS. 1-6, one Embodiment of the manufacturing apparatus of the package of this invention is described.

  As shown in FIGS. 1 to 3, the package manufacturing apparatus 10 (hereinafter simply referred to as “manufacturing apparatus 10”) includes a roll 20 around which a packaging sheet S is wound. The packaging sheet S pulled out from the roll 20 is stretched by a plurality of guide rolls 21 rotatably disposed at predetermined positions, and is guided to a former 31 described later. 1 to 3, a sheet feeding roller 22 that is rotated by a rotating means (not shown) is disposed above the guide roll 21 that is disposed on the upper right side. A packaging sheet S is sandwiched between the sheet feeding roller 22 and the guide roll 21, and the packaging sheet S is sent out to the former 31. In this embodiment, the above structure constitutes the sheet supply means in the present invention.

  FIG. 7 shows an example of the packaging sheet S. As the packaging sheet S, for example, a heat-weldable film such as polypropylene, polyethylene, nylon, or polyester is employed. In addition, since the inner surface of the film for a package is sealed, a film in which a heat sealable sealant layer is laminated on the base film layer, or an intermediate layer between the base film layer and the sealant layer. It is also preferable to adopt a film having a multilayer structure by sandwiching.

  As the base film layer, a uniaxially stretched film (film stretched in one direction) or a biaxially stretched film (film stretched in the vertical and horizontal directions) such as polyethylene, polypropylene, polyester, and nylon can be used. . As the intermediate layer, high density polyethylene film, biaxially oriented polypropylene film (OPP film), nylon film, ethylene vinyl acetate copolymer saponified product (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), etc. Further, a vapor deposition layer of aluminum foil, silica, or the like can be used. Moreover, as a heat sealable sealant layer, unstretched polypropylene film (CPP), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or the like can be used. In addition, as for the thickness of the said packaging sheet S, 20-200 micrometers is common.

  Further, as shown in FIG. 7, as the packaging sheet S, for example, the contents of an article to be packaged such as “milk caramel” or the like printed in advance on the outer surface of the packaging sheet S may be used. Further, a mark M may be attached to the side of the packaging sheet S with a predetermined interval (for example, an interval corresponding to the length of the sheet constituting one package). Such a mark M is detected by a phototube device (not shown) provided in the manufacturing apparatus 10, so that an article to be packaged can be input, a sheet feeding belt 34, a vertical sealer 32, a folding plate 35, and a horizontal sealer 36 described later. It becomes possible to control the operation timing of each component.

  Further, from the viewpoint of manufacturing management, as shown in FIG. 8, a mark M1 for controlling the operation timing of the folding means may be added. By attaching the mark M1, it is not necessary to align the position of the film with human eyes, and in addition, there is an advantage that the folding means can be operated at a position where the gusset is surely inserted even during the production.

  In the case of the packaging sheet S shown in FIG. 8, the mark M is attached to one side of the packaging sheet S, and the mark M1 is attached to the other side. In this case, the mark M is attached at the same interval as the length of the sheet constituting one package, and the mark M1 is attached at an interval twice the length of the sheet constituting one package. Yes.

  Further, as shown in FIG. 9, a short mark M in the width direction and a width in the width direction are provided on one side of the length direction of the packaging sheet S with an interval corresponding to the length of the sheet constituting one package. Long marks M2 may be alternately attached. In this case, the mark M2 is a mark obtained by combining the mark M and the mark M1 in the embodiment of FIG. 8, and is used for controlling the operation timing of the welding seal and also controls the operation timing of the folding means. Also used for.

  Furthermore, as shown in FIG. 7, the printing is performed so as to be alternately reversed for each sheet constituting one package along the length direction of the package sheet S. In the case of this embodiment, “milk caramel” and the design representing its contents are printed in the horizontal direction at the lowermost part of the packaging sheet S, and the print printed on the upper side is the reverse of the lowermost printing. Further, printing in the same direction as the lowermost printing is performed above the printing.

  Further, the manufacturing apparatus 10 is provided with a cylindrical cylinder 30 along the vertical direction (vertical direction). Above this cylinder 30 is disposed a storage device (not shown) for storing articles to be packaged made of confectionery such as chocolate candy and caramel candy, from this storage device, A packaged object such as caramel is put into the cylinder 30. In addition, as a to-be packaged object, it is not limited to the said confectionery, Processed food etc. may be sufficient.

  A former 31 is attached to the outer periphery above the cylinder 30 and extends obliquely downward from the outer periphery of the cylinder 30 and has a shape like a sailor collar as a whole. A small gap (not shown) is formed between the former 31 and the outer periphery of the cylinder 30, and the width of the packaging sheet S is overlapped in the vertical direction through the gap. It is wound around in a cylindrical shape.

  A vertical sealer 32 is provided below the former 31 and on the side of the cylinder 30 to thermally seal and seal the longitudinal seam of the cylindrically formed packaging sheet S. It is arrange | positioned so that contact / separation is possible.

  On the outer periphery of the cylinder 30, a sheet feeding belt 34 stretched by a pair of rollers 33 and 33 is disposed in the vertical direction. A packaging sheet S is sandwiched between the sheet feeding belt 34 and the outer periphery of the cylinder 30. The sheet feeding belt 34 is intermittently rotated to pull the packaging sheet S downward by a predetermined dimension. In this embodiment, the above-described structure comprising the roller 33 and the sheet feeding belt 34 constitutes the sheet pulling means in the present invention.

  A pair of folding plates 35 are disposed below both ends of the cylinder 30 below the lower end (see the broken line in FIG. 1) and in a direction perpendicular to the joint of the cylindrically formed packaging sheet S. Has been. The front end portion of the folding plate 35 has a triangular shape, and the pair of folding plates 35 and 35 are disposed with the front ends of the triangular shape facing each other. Each folding plate 35 can be advanced and retracted in a direction orthogonal to the axial direction of the cylinder 30 by a driving means (not shown). And before folding the opening part of the cylindrical packaging sheet S, each folding plate 35 is pushed in on both sides of the packaging sheet S, and forms a crease on both sides of the packaging sheet S ( (See FIG. 2). This pushing-in operation of the folding plate 35 is not performed every time the packaging sheet S is welded by the horizontal sealer 36, but is set to be performed every other time for the welding operation of the horizontal sealer 36. Yes. In particular, it is preferable in manufacturing management to control the pushing operation of the folding plate 35 by the mark M1 or M2.

  The folding plate 35 constitutes a folding means in the present invention. Further, the folding means is not limited to the folding plate 35, but may be a rod-like folding rod, air blowing, or a rail-like one arranged in the vertical direction.

  A horizontal sealer 36 is disposed below the folding plate 35 to weld and seal the packaging sheet S formed in a cylindrical shape in the horizontal direction. The horizontal sealer 36 has a pair of sandwiching blocks 37 and 37 disposed so as to be close to and away from each other, whereby the packaging sheet S is sandwiched (see FIGS. 2 and 3). Further, a concave groove 38 extending in the width direction is formed in the middle in the height direction of the opposed inner surface of each clamping block 37. Heaters 39 are provided on the upper and lower sides of the inner side surfaces of the respective holding blocks 37 through the concave grooves 38, so that the packaging sheet S sandwiched between the respective holding blocks 37 is welded in the lateral direction. It has become. Further, a cutter (not shown) is disposed in the concave groove 38 so as to cut an intermediate portion of a portion welded by the heater 39. Note that the cutter may be a cutting edge that perforates instead of a cutting edge that cuts the packaging sheet S. If it carries out like this, since the cutting | disconnection or perforation for separating a package body can be put simultaneously with welding, productivity can be improved further.

  Next, the manufacturing method of the package by this invention using the manufacturing apparatus 10 which consists of the said structure is demonstrated.

  First, the packaging sheet S is fed from the roll 20 by the sheet feeding roller 22 and stretched on the plurality of guide rolls 21, and then introduced into the gaps between the cylinder 30 and the former 31, and the side in the width direction of the packaging sheet S is introduced. Are stacked in the vertical direction and wound around the outer periphery of the cylinder 30 in a cylindrical shape.

  In this state, the sheet feeding belt 34 intermittently pulls out the packaging sheet S by the length necessary for manufacturing the package 1 for one bag. When the packaging sheet S is pulled out by a predetermined length, the sheet feeding belt 34 is stopped, and the longitudinal seam 32 is welded and sealed in the longitudinal seam of the packaging sheet S wound in a cylindrical shape.

  Next, as shown in FIG. 1, the longitudinally sealed cylindrical packaging sheet S is pulled out by a predetermined length until it is positioned at the holding blocks 37, 37 where the horizontal sealer 36 is opened. At this time, the lower end of the packaging sheet 3 is welded by the horizontal sealer 36 in the previous step, and the inside of the package is filled.

  When the predetermined position of the packaging sheet S is pulled out until it is located in the holding block 37, the sheet feeding belt 34 is stopped, and the pair of folding plates 35, 35 are pushed into both sides of the cylindrical packaging sheet S, and the packaging sheet The crease 2 is formed on both sides of S.

  When the push-in operation of the folding plate 35 is finished, the sandwiching blocks 37 and 37 are closed as shown in FIG. 2, and a predetermined portion of the packaging sheet S is welded and sealed by the heater 39 and disposed in the concave groove 38. The packaging sheet S is cut at approximately the middle of the welded portion with a cutter (not shown). Thereby, the upper edge part 3 of the lower packaging sheet S already filled with the article to be packaged is sealed, and the package 1 is manufactured. At the same time, the package 1 is separated from the upper packaging sheet S that is not yet filled with the article to be packaged, and falls downward.

  On the other hand, an upper packaging sheet S that is not filled with an article to be packaged is sealed at the lower end to form the lower edge portion 4. In this state, the sandwiching blocks 37 and 37 are opened, and the pair of folding plates 35 and 35 are also retracted. Then, an article to be packaged such as caramel is dropped from a storage device (not shown) disposed above the cylinder 30 and filled into the cylindrical packaging sheet S through the cylinder 30.

  When the packing material has been filled, the sheet feeding belt 34 pulls the packaging sheet S downward by a predetermined length, and a predetermined portion of the packaging sheet S (a portion corresponding to the upper edge of the package 1 where the packaging material is dropped). ), The feed belt 34 stops.

  And this time, without performing the pushing-in operation of the folding plate 35, as shown in FIG. 3, the above-mentioned portion of the packaging sheet S is welded and sealed in the lateral direction as it is by the lateral sealer 36, and cut at the same time. The body 1 falls downward. A discharge conveyor (not shown) is disposed below the horizontal sealer 36, and the package 1 is supplied to the discharge conveyor.

  The said process is repeated and the package 1 is manufactured continuously. This process will be described in more detail with reference to FIGS.

  That is, in the case shown in FIG. 4, the lower end of the packaging sheet S located below the horizontal sealer 36 is sealed and filled with an article to be packaged. In this state, when the folding plate 35 is pushed into both sides of the packaging sheet S, the folds 2 are formed on both sides of the portion of the packaging sheet S that extends over the horizontal sealer 36. The crease 2 is deepest at the portion where the folding plate 35 is inserted, and becomes shallower as it goes away from it, and reaches the portion without the crease 2. In this way, the fold line 2 is formed on both side portions of the packaging sheet S positioned above and below the horizontal sealer 36 by a single pushing operation of the folding plate 35. In this state, the packaging sheet S is welded and sealed in the horizontal direction by the horizontal sealer 36, and the intermediate portion of the welded portion is cut so that the crease 2 is not formed below the horizontal sealer 36. The package 1 is manufactured by welding and forming a crease 2 on the upper side.

  Then, the wrapping sheet S is drawn downward again by the sheet feeding belt 34, but at the time of the horizontal sealing immediately after the folding plate 35 is operated, the pushing operation by the folding plate 35 is not performed continuously, as shown in FIG. The next packaging body 1 is manufactured by transversely sealing and cutting the packaging sheet S with the lateral sealer 36 as it is. At this time, since the crease 2 is already formed obliquely upward from below in the packaging sheet S, the fold 2 is formed in the upside down direction, that is, the crease 2 is formed downward. The package 1 which is welded and welded without forming the crease 2 on the upper side is manufactured.

  Further, at the time of the next horizontal seal, the folding plate 35 is again pushed into both sides of the packaging sheet S, and the fold 2 is formed.

  As described above, in the present invention, when the packaging sheet S is welded by the lateral sealer 36, the folding plate 35 is pushed in every other time, and the lateral sealer is formed with folds formed on both sides of the packaging sheet S. The portions welded in the horizontal direction by 36 and the portions welded in the horizontal direction by the horizontal sealer 36 without forming folds on both sides of the packaging sheet S are alternately formed.

  That is, when the packaging sheet S is welded in the lateral direction by the lateral sealer 36, the folding plate 35 is pushed every other time, so that the packaging body 1 having the crease 2 on one side and the crease 2 on the other side is not provided. It can be continuously produced with good productivity.

  When the packaging body 1 obtained in this manner is set up with the welded portion 1a having the crease 2 facing downward, as shown in FIG. 6, the portion where the crease 2 is formed is pressed against the article to be packaged, so that the outer side is square. It spreads. As a result, a flat surface can be formed at the bottom of the package 1, and the package 1 can be held in an upright state, so that self-supporting properties can be imparted.

  Moreover, when opening the welding part 1b in which the crease | fold 2 is not formed and taking out a to-be-packaged object, since an opening part becomes large, it can make it easy to take out a to-be-packaged object.

  Furthermore, since the packaging body 1 is manufactured using the packaging sheet S as shown in FIGS. 7 to 9, when applied as a packaging sheet of the above-described manufacturing method, the bottom portion formed by forming the crease 2 and sealed On the other hand, a package with the correct printing direction can be continuously produced with high productivity.

  INDUSTRIAL APPLICABILITY The present invention can be used for, for example, a manufacturing method and a manufacturing apparatus for a package filled with confectionery, processed food, agricultural products, and the like.

It is a perspective view which shows one Embodiment of the manufacturing apparatus of the package of this invention, and shows the state before carrying out horizontal sealing. It is perspective view which shows one Embodiment of the manufacturing apparatus of the same package, and shows the state sealed laterally after the folding board was inserted. It is a perspective view which shows one Embodiment of the manufacturing apparatus of the same package, and shows the state by which the folding plate was not inserted but was laterally sealed. It is explanatory drawing which shows the state laterally sealed after the folding board of the manufacturing apparatus of the package was thrust. It is explanatory drawing which shows the state by which the folding plate of the manufacturing apparatus of the same package was not inserted, and was laterally sealed. It is a perspective view which shows the bag body manufactured with the manufacturing apparatus of the package. It is explanatory drawing which shows an example of the packaging sheet of this invention. It is explanatory drawing which shows the other example of the packaging sheet. It is explanatory drawing which shows another example of the packaging sheet. It is a perspective view which shows the conventional package body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packing body 2 Folding line 10 Production apparatus 20 Roll 21 Guide roll 22 Sheet feeding roller 30 Cylinder 31 Former 32 Vertical sealer 33 Roller 34 Sheet feed belt 35 Folding plate 36 Horizontal sealer 37 Holding block 38 Concave groove 39 Heater S Packaging sheet M, M1 , M2 mark

Claims (6)

Wrapping the packaging sheet supplied by the sheet supply means around the outer periphery of a cylindrical cylinder arranged in the vertical direction via the former,
The seam of the packaging sheet wound around the outer periphery of the cylinder is welded in the vertical direction by a vertical sealer,
In a state where the lower end of the packaging sheet is already welded and sealed by a horizontal sealer, the article to be packaged is introduced from the cylinder, and the article to be packaged is filled into a cylindrically formed packaging sheet,
Before or after the filling, the packaging sheet is pulled downward by a predetermined dimension by the sheet pulling means, and a position to be welded and sealed in order to enclose the article to be packaged by a predetermined distance above the lower end of the packaging sheet In the method for manufacturing a package body in which the package sheet is sealed in the horizontal direction with the horizontal sealer so as to enclose the article to be packaged,
A pair of folding means capable of folding both sides of the packaging sheet is disposed below the cylinder and above or below the horizontal sealer,
When the packaging sheet is welded by the horizontal sealer, the folding means is actuated every other time, a fold is formed on both sides of the packaging sheet, and a portion welded in the lateral direction by the horizontal sealer, and the packaging sheet A method for producing a package, comprising forming a crease on both sides of the sheet and forming a portion welded in the transverse direction by the transverse sealer alternately.   The method for manufacturing a package according to claim 1, wherein the folding means is formed of a folding plate that is pushed into both sides of the packaging sheet to form a fold. A cylindrical cylinder arranged in the longitudinal direction into which an article to be packaged is placed;
A former in which a packaging sheet is wound around the outer periphery of the cylinder,
Sheet supply means for supplying a packaging sheet to the former;
A vertical sealer that welds the seam of the packaging sheet wound around the outer periphery of the cylinder in the longitudinal direction to form the packaging sheet in a cylindrical shape;
A pair of folding means disposed on both sides of the cylindrically formed packaging sheet below the cylinder;
A horizontal sealer that is disposed below or above the folding means and welds a cylindrically formed packaging sheet in a lateral direction;
Sheet pulling means for pulling the packaging sheet formed in a cylindrical shape downward by a predetermined dimension;
An apparatus for manufacturing a package, wherein when the packaging sheet is welded by the lateral sealer, the folding means is operated every other time to fold both sides of the packaging sheet.   4. The packaging body manufacturing apparatus according to claim 3, wherein the folding means is composed of a pair of folding plates capable of moving back and forth in a direction perpendicular to the axial direction of the cylinder. A packaging sheet used in the method for producing a package according to claim 1 or 2,
Forming a continuous strip shape, the pattern of the package is printed so as to be alternately reversed for each sheet constituting one package along the length direction of the packaging sheet,
A packaging sheet, wherein marks for detecting the position of the sheet are attached at the same interval as the length of the sheet constituting one packaging body.   The mark is attached at the same interval as the length of the sheet constituting one package, and the mark is attached at an interval twice the length of the sheet constituting one package. The packaging sheet of Claim 5 which has these.

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