JP3350206B2 - Handbag manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a handbag having a bag body having a wide bottom and particularly suitable for quickly storing a box-shaped disc-shaped article. is there.

[0002]

2. Description of the Related Art Conventionally, a shopping bag having a vertically long bag portion has been used as a shopping bag for a supermarket or the like. On the other hand, a handbag having a bag portion formed in a horizontal direction has been proposed by the present inventor for articles to be kept horizontally, such as lunch boxes and sushi-folds (Japanese Utility Model Publication No. 2-15792). . These are for accommodating a disk-shaped object, but have a drawback that when an article is stored, the corner of the disk-shaped object is caught in the opening and the storage is troublesome. On the other hand, when the customer concentrates on lunch such as a lunch box and the packaging speed of articles greatly contributes to sales, the storage speed becomes very important. In this manner, a bag that can easily store articles is disclosed in Japanese Utility Model Laid-Open No. 2-87750.
A bag of the publication is known. In this bag, the bag body portion is formed in a horizontally long shape, and the handbag film on the upper surface of the handbag bag is extended longer than the upper surface of the bag body portion. When you pull up, the items naturally fall into the bag. However, in this bag, if the width of the handbag is narrowed, the storage speed of goods is reduced, and if the width of the handbag is wide, the installation area of the bag is widened, which is inconvenient in a narrow sales floor, and the handbag is simply used for film. With finger holes, the strength of the handle is low.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a durable and easy-to-hang handbag which can drop an article placed on the bag described in Japanese Utility Model Application Laid-Open No. 2-87750 into the bag. It is an object of the present invention to provide an efficient continuous bag making method capable of mechanically manufacturing a bag in which is folded.

[0004]

Means for Solving the Problems As a result of earnest research, the present inventor has developed a method of continuously forming a bag by continuously gusset folding a strip film and applying a specific heat sealing step thereto. With the idea, the present invention has been completed. That is, the present invention includes the following aspects. (1) A plastic strip film is continuously sent out to the gusset folding step, and parallel bottom folds 23 and 24 with a bottom film 7 spaced on both sides of the center line of the strip film, and both side edges of the strip film. Is folded inward once to form the lateral side films 3 and 4 on both sides of the bag body portion, and the folded edges 21 and 22 at the inner edges of the lateral side films 3 and 4 on both sides are formed on both sides of the band-shaped film. Is again folded in the downward and outward direction to form the suspended film portions 41 and 42, and the side edges of the band-shaped film outside the suspended film portions 41 and 42 are projected outside the bottom fold 23 and the bottom fold 24. At the side edges of the band-shaped film, and again bent inward at the hand-folded fold 25 and the hand-folded fold 26 to overlap the hand-held film 27.
And 28 to form a gusset-fold polymer of a band-like film folded at three pairs of symmetrical folds, and then intermittently transfer the gusset-fold polymer to a V-shaped sealing process by a predetermined one-pitch transfer. Hand folds 25 and 26 on the boundary between the bags in the belt-like film.
Then, a V-shaped hot blade having a shape that spreads outward with its tip toward the center of the belt-shaped film is pressed to form a welding seal, and the hanging film portions 41 above and below the hand-folded folds 25 and 26 are provided.
42 and the handpiece films 27 and 28 are obliquely fused by V-shaped inclined fusion lines 44 and 45, respectively, and the notches 17 and 18 are cut out at the fold side edges of the handpiece folds 25 and 26. The film 27, 28 is separated from the hanging film portions 41, 42, and is cut off at the boundary between the bags in the band-shaped film, and the lateral films 3, 4 are cut into the boundary film 43 at the bottom film 7. A method for manufacturing a handbag, comprising: (2) The plastic strip film is continuously sent out to the gusset folding step, and parallel bottom folds 23 and 24 with the bottom film 7 spaced on both sides of the center line of the strip film, and both side edges of the strip film. Is folded inward once to form the lateral side films 3 and 4 on both sides of the bag body portion, and the folded edges 21 and 22 at the inner edges of the lateral side films 3 and 4 on both sides are formed on both sides of the band-shaped film. Is again folded in the downward and outward direction to form the suspended film portions 41 and 42, and the side edges of the band-shaped film outside the suspended film portions 41 and 42 are projected outside the bottom fold 23 and the bottom fold 24. At the side edges of the band-shaped film, and again bent inward at the hand-folded fold 25 and the hand-folded fold 26 to overlap the hand-held film 27.
And 28 to form a gusset-fold polymer of a band-like film folded at three pairs of symmetrical folds, and then intermittently transfer the gusset-fold polymer to a V-shaped sealing process by a predetermined one-pitch transfer. On the seal base N inserted into the lower surface of the bottom fold 23 and the seal base M inserted in the lower surface of the bottom fold 24, the bottom fold 2 of the band-shaped film.
3 and the bottom fold 24 are pressed against a V-shaped hot blade extending toward the fold to form a welding seal on the bottom fold 23 and the bottom fold 24 on the boundary line between the bag and the bag. Hand folds 25 and 26 on body border
Then, a V-shaped hot blade having a shape that spreads outward with its tip toward the center of the belt-shaped film is pressed to form a welding seal, and the hanging film portions 41 above and below the hand-folded folds 25 and 26 are provided.
42 and the handpiece films 27 and 28 are obliquely fused by V-shaped inclined fusion lines 44 and 45, respectively, and the notches 17 and 18 are cut out at the fold side edges of the handpiece folds 25 and 26. A method of manufacturing a handbag, comprising separating the handbag films 27 and 28 from the hanging film portions 41 and 42 and cutting the belt-like film vertically on the boundary between the bags. (3) The method for manufacturing a handbag according to (2), wherein the tip of the V-shaped hot blade pressed against the bottom folds 23 and 24 has a rounded curved shape. (4) The plastic strip film is continuously sent out to the gusset folding step, and parallel bottom folds 23 and 24 with the bottom film 7 spaced on both sides of the center line of the strip film, and both side edges of the strip film. Is folded inward once to form the lateral side films 3 and 4 on both sides of the bag body portion, and the folded edges 21 and 22 at the inner edges of the lateral side films 3 and 4 on both sides are formed on both sides of the band-shaped film. Is again folded in the downward and outward direction to form the suspended film portions 41 and 42, and the side edges of the band-shaped film outside the suspended film portions 41 and 42 are projected outside the bottom fold 23 and the bottom fold 24. And extend along the protruding side edge of the band-shaped film.
7 and 38 are supplied and superimposed on the side edge to construct a polymer which is combined with a gusset fold of a band film and a hand-held film tape, and then the combined polymer is subjected to a predetermined one pitch in a V-shaped sealing process. It is fed intermittently by transport, and a V-shaped hot blade with a shape that spreads outward with its tip toward the center of the band-shaped film is pressed against the hand-held film tapes 37 and 38 on the boundary line between the bags in the band-shaped film. A welding seal is applied, and the hand-held film tapes 37 and 38 are fused obliquely at V-shaped inclined lines, respectively.
The ends of the hanging films 7 and 38 are fixed to the side edges of the hanging film portions 41 and 42, and the boundaries between the bags in the belt-like film are blown off, and the lateral side films 3 and 4 are fused to the bottom film 7. A method for manufacturing a handbag, comprising fixing the bag. (5) The plastic strip film is continuously sent out to the gusset folding step, and parallel bottom folds 23 and 24 with the bottom film 7 spaced on both sides of the center line of the strip film, and both side edges of the strip film. Is folded inward once to form the lateral side films 3 and 4 on both sides of the bag body portion, and the folded edges 21 and 22 at the inner edges of the lateral side films 3 and 4 on both sides are formed on both sides of the band-shaped film. Is again folded in the downward and outward direction to form the suspended film portions 41 and 42, and the side edges of the band-shaped film outside the suspended film portions 41 and 42 are projected outside the bottom fold 23 and the bottom fold 24. And extend along the protruding side edge of the band-shaped film.
7 and 38 are supplied and superimposed on the side edge to construct a polymer which is combined with a gusset fold of a band film and a hand-held film tape, and then the combined polymer is subjected to a predetermined one pitch in a V-shaped sealing process. It is fed intermittently by transfer, and the bottom fold 23 and the bottom fold 24 of the belt-like film are turned toward the fold on the seal base N inserted into the lower surface of the bottom fold 23 and the seal base M inserted into the lower surface of the bottom fold 24. By pressing a V-shaped hot blade that spreads, a welding seal is formed on the bottom fold 23 and the bottom fold 24 on the boundary between the bag and the bag, and further, a hand-held film tape 37 on the boundary between the bag and the bag. And 38, press the V-shaped hot blade of the shape spreading outward with the tip toward the center of the belt-shaped film, apply the welding seal, and hold the hand-held film tapes 37, 38 with V-shaped inclined lines respectively. Fused in order, handbag film tape 3
A method for manufacturing a handbag, comprising fixing the ends of the hanging films (7, 38) to the side edges of the hanging film portions (41, 42) and cutting the belt-like film vertically on the boundary between the bags.

[0005] The plastic strip film used in the present invention can be used without particular limitation as long as it is a thermoplastic resin film, for example, a thermoplastic resin film such as polyethylene, polypropylene, polyester and nylon. In particular, polyethylene film and polypropylene film are suitable from the viewpoint of processability. The manufacturing method of the present invention can use a device used in a normal mechanical bag making process, for example, a gusset folding device, a continuous feeding device for a strip film, an intermittent feeding device, a heat seal, and a fusing device as appropriate. it can. As the V-shaped hot blade used in the present invention, a V-shaped hot blade usually used in a square bottom manufacturing process can be used, but in the present invention, the tip has a rounded curved shape. Some are desirable. The strength of the bag can be increased by making the tip of the V-shaped hot blade circular and curved. The present invention is characterized in that a hand-held film tape is provided on an outer edge of a suspended film portion. In the conventional bag, since the finger hole is provided in the film, the gravity of the bag is vertically applied to the edge of the finger hole, and there is a high possibility that the film is broken. As in the present invention, the end of the hand-held film tape is fixed to the hanging film portion with a fusion line, and the strength of supporting the hand-held film tape with the surface of the hand-held film tape when hanging it is much greater.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings of embodiments. Example 1 The manufacturing method according to the first aspect of the present invention, as shown in the cross-sectional view of FIG.
The plastic strip film is continuously sent out to the gusset folding step, and both side edges of the strip film are temporarily separated by parallel bottom folds 23 and 24 at both sides of the center line of the strip film with the bottom film 7 spaced 20 cm apart. It is folded inward and downward to form lateral side films 3 and 4 on both sides of the bag body portion, and 4 on the inner edge of the lateral side films 3 and 4 on both sides.
The both sides of the strip film are folded back outward again at the folded edges 21 and 22 spaced apart by a distance of cm to form the suspended film portions 41 and 42, and the outside of the suspended film portions 41 and 42 is formed. Of the belt-like film extends outside the bottom fold 23 and the bottom fold 24, and the hand fold 25 of the side edge of the belt-like film
Then, it is folded again inward at the folding fold 26 and superimposed to form 4 cm width of the folding films 27 and 28 to form a gusset-fold polymer of a band-like film folded at three pairs of symmetric folds. . Next, the gusset-folded polymer is intermittently fed into the V-shaped sealing step by a predetermined one-pitch transfer, with the tips of the gusset-folded polymers facing handbag folds 25 and 26 on the boundary between the bags and the center of the band-shaped film. A V-shaped hot blade having a shape spreading outward is pressed to form a welding seal, and hanging films 41, 42 and hand films 27, 28 above and below the hand folds 25, 26 are respectively V-shaped inclined. The welding is performed obliquely at the welding lines 44 and 45. This V-shaped sealing step is performed on the gusset-fold polymer of the band-shaped film every 40 cm in length of the bag body of this embodiment. This V
In the V-shaped sealing step, the V-shaped hot blades are pressed to suspend the handheld films 27, 28 and fuse them to the film portions 41, 42 by the inclined fusion lines 44, 45.
Excess film can be removed by cutting the outside of 4, 45. By punching out notches 17 and 18 having a width of 6 mm at the fold side edges of the hand folds 25 and 26, the hand films 27 and 28 are suspended.
1, 42. The notch step and the film removal step outside the inclined fusion lines 44 and 45 can be performed in the state of a gusset-folded polymer of a band-shaped film, and are separated into each bag after the fusing step. Can be applied to bags. In this case, 100 to 300 sheets can be cut and removed while being pressed while being stacked. After the step of fusing the hand-held film, the border film between the bag and the bag is cut off every 40 cm across the center of the V-shaped seal portion of the hand-held film, and the lateral film 3 is attached to the bottom film 7. , 4 and the hanging film portions 41 and 42 are fused and fixed by the boundary fusing portion 43 and separated into respective bags. The shape of the V-shaped seal according to the present embodiment is such that the tip is rounded, the interval between the V-shaped inclined portions is widened, and the bottom of the pot is V-shaped, or the V-shaped seal is substantially V-shaped. It is possible to reduce the length of the hand-held film by forming a V-shaped shape having a space between the tips of the molds and narrowing the space between the fusion-fixed portions of the hand-held film and the hanging film portion. As shown in FIG. 4, a large number of the bags manufactured in this embodiment are stacked and placed upward, and articles to be stored are placed on the bags, and the bags 27 and 28 are immediately held. If it is lifted vigorously as it is, the article falls on the bottom film 7 and can be instantaneously packed.

Embodiment 2 As in Embodiment 1, a plastic strip film is continuously fed to a gusset folding step, and parallel bottom folds 23 with a bottom film 7 spaced on both sides of the center line of the strip film and At the bottom fold 24, both side edges of the band-shaped film are once bent downward and inward to form the lateral side films 3, 4 on both sides of the bag body portion, and the folded edges 21 on the inner edges of the lateral side films 3, 4 on both sides. Then, both side edges of the band-shaped film are turned back downward and outward again by the folded edge 22 to form the hanging film portions 41 and 42, and the side edges of the band-shaped film outside the hanging film portions 41 and 42 are folded at the bottom. 23 and the bottom fold 24 are extended so as to protrude outside, and are folded again inward at the side folds 25 and 26 at the side edges of the strip-shaped film to overlap. The hand films 27 and 28 are formed to construct a gusset-fold polymer of a band-like film folded at three pairs of symmetric folds. Next, the gusset-folded polymer is intermittently fed into the V-shaped sealing process by a predetermined one-pitch transfer, and the seal base N inserted into the lower surface of the bottom fold 23 and the seal base M inserted into the lower surface of the bottom fold 24 Then, the bottom fold 23 and the bottom fold 24 of the belt-shaped film are pressed by a V-shaped hot blade that spreads toward the fold, thereby sealing the bottom fold 23 and the bottom fold 24 on the boundary line between the bag and the bag. Execute. As shown in FIGS. 7 and 8, the V-shaped seal of this embodiment is configured such that the V-shaped hot blades V ₁ and V ₂ having rounded tips from the top of the bottom folds 23 and 24 are sealed with seal bases M and N. To separate the V-shaped film piece F by fusing. The roundness of the V-shaped hot blades V ₁ and V ₂ has the advantage of increasing the strength of the opening edge because the angle intersecting the opening edge of the product bag is not acute, and also facilitates the last fusing step. There are advantages. As the shape of the V-shaped hot blade, a shape in which the curved portion has a curvature of R with respect to the straight portions 31 and 32 as shown in FIG. 9 and a shape in which the tip is slightly separated as shown in FIG. 10 can be used. . Further, in the same manner as in the first embodiment, a V-shaped hot blade having a shape extending outward toward the center of the belt-like film is pressed against the hand-folded folds 25 and 26 on the boundary between the bags, and the sealing is performed. And the hanging film portions 41 and 42 and the hand film portions 27 and 28 above and below the hand folding folds 25 and 26 are fused obliquely with V-shaped inclined fusion lines 44 and 45, respectively. The notch portions 17 and 18 are cut out at the fold side edges of the fold portions 26 and 26, so that the hand-held portion films 27 and 28 are suspended and the film portions 41 and 42 are suspended.
Separate from As in the first embodiment, the step of removing the outer film of the welding seal and the step of punching the hand-held film can be performed after or simultaneously with the cutting of the bag. Finally, the band-like film can be cut vertically at the boundary between the bags to produce the bags shown in FIGS. In the present embodiment, the last cutting step is a simple mechanical cutting, but can be cut by the same fusing step as in the embodiment. Instead of fusing the bottom folds 23 and 24 with a V-shaped hot blade in FIGS. In this case, extra film is attached to the outside of the square bottom structure, and the appearance is poor, but there is no effect on use. Such an embodiment of a simple welding seal is also one embodiment of the present invention.

Example 3 A plastic strip film is continuously fed to a gusset folding step, and a parallel bottom fold 23 and a bottom fold 24 are provided on both sides of a center line of the strip film with a bottom film 7 therebetween. Is folded inward once to form lateral side films 3 and 4 on both sides of the bag body portion, and a band-shaped film is formed by the folded edges 21 and 22 on the inner edges of the lateral side films 3 and 4 on both sides. Are folded back again downward and outward, and the suspended film portion 4
1 and 42 are formed, and the side edges of the band-shaped film outside the hanging film portions 41 and 42 are extended so as to protrude outside the bottom folds 23 and 24, and the protruded side edges of the band-shaped film are protruded. Along the hand film tape 37
And 38 are supplied and superimposed on the side edges to build a polymer combined with a gusset fold of a band film and a hand-held film tape. The only difference is that in the first embodiment, instead of forming the hand folds 25 and 26, separate hand film tapes 37 and 38 are supplied. In this case, since the hand film is separated from the beginning, the separation is performed. The step of notching is unnecessary. Other steps are the same as in the first embodiment. That is, the combination polymer is intermittently fed into the V-shaped sealing step by a predetermined one-pitch transfer, and the hand-held film tapes 37 and 38 on the boundary between the bags are formed.
Then, pressing the V-shaped hot blade with the tip extending toward the center of the belt-shaped film and spreading outward, welding seal is applied, and the hand-held film tapes 37 and 38 are obliquely fused with V-shaped inclined lines respectively. Then, the ends of the hand-held film tapes 37, 38 are fixed to the side edges of the hanging film portions 41, 42, and the center of the V-shaped seal portion of the hand-held film is cut off along the boundary between the bags. Then, the lateral side films 3 and 4 and the hanging film portions 41 and 42 are fused and fixed to the bottom film 7 to manufacture the bag of this embodiment. This bag is
Except for the structure of the notch on the side edge, the bag is the same as the bag of the first embodiment as shown in FIG.

Embodiment 4 A plastic band-like film is continuously fed to a gusset folding step, and the band-like film is formed by parallel bottom folds 23 and 24 with a bottom film 7 spaced on both sides of the center line of the band-like film. Is folded inward once to form lateral side films 3 and 4 on both sides of the bag body portion, and a band-shaped film is formed by the folded edges 21 and 22 on the inner edges of the lateral side films 3 and 4 on both sides. Are folded back again downward and outward, and the suspended film portion 4
1 and 42 are formed, and the side edges of the band-shaped film outside the hanging film portions 41 and 42 are extended so as to protrude outside the bottom folds 23 and 24, and the protruded side edges of the band-shaped film are protruded. Along the hand film tape 37
And 38 are supplied and superimposed on the side edges to build a polymer combined with a gusset fold of a band film and a hand-held film tape. The same process as in Example 2 is applied to this polymer, and a bag having the same structure as in Example 2 can be manufactured except for the notched portion of the handhold. That is, the combined polymer is intermittently fed into the V-shaped sealing step by a predetermined one-pitch transfer, and the seal base N inserted into the lower surface of the bottom fold 23 and the seal base M inserted into the lower surface of the bottom fold 24
On the bottom fold 23 and the bottom fold 24 of the strip film.
Is welded to the bottom fold 23 and the bottom fold 24 on the boundary between the bag and the bag by pressing the V-shaped hot blade spreading toward the fold, and further, on the boundary between the bag and the bag. A V-shaped hot blade having a tip extending toward the center of the belt-like film and extending outward is pressed against the hand-held film tapes 37 and 38 to form a welding seal, thereby forming a hand-held film tape 3.
7 and 38 are fused obliquely with a V-shaped inclined line, and the ends of the hand-held film tapes 37 and 38 are fixed to the side edges of the hanging film portions 41 and 42, and the belt-shaped film is bagged and bagged. Was cut vertically on the boundary line to produce a handbag. Supply device used in the above embodiment, gusset folding device,
As the intermittent supply device, the V-shaped seal and the V-shaped fusing device, the cutting device on the boundary line, and the press cutting device, those commonly used in the bag making process can be used as they are. FIGS. 11 and 12 are vertical and horizontal side views of a bag having a bag body having a square bottom structure manufactured in Example 2, and show a state in which a box-shaped article is stored in the handbag. The lower part of the handbag is a box-shaped rectangular parallelepiped bag, which is a rectangular bottom film 7 (FIG. 11) that supports the bottom surface of the box in which it is stored.
12 and not visible in FIG. 12, see FIG.
And 24, the left and right side edges are connected to the lateral side film 3 and the opposite lateral side film 4 (in a position not visible in FIG. 12), and these lateral side films 3,
4 is continuous with the hanging film part 41 and the hanging film part 42, respectively. From the vertical side edge of the bottom film 7, it is integrally continuous with the middle vertical side film 5 and the middle vertical side film 6 (in a position not visible in FIG. 11) opposite to the middle vertical side film 5, and The upper right side of the longitudinal side film 5 in the drawing is joined to the upper longitudinal side film 11 continuous from the lateral side film 3 by a fusion line 8 running obliquely from the opening edge 13 to the corner 15 at the corner. The upper left side of the drawing is joined to the upper longitudinal side film 12 continuous from the lateral side film 4 by a fusion line 9 running obliquely from the opening edge 14 to the corner 16 at the corner. The vertical side surface of the bag body portion is constituted by three films including a middle vertical side film 5 and upper vertical side films 11 and 12 joined to the left and right upper portions by fusion lines 8 and 9, The upper edge 10 of the middle longitudinal side film is a part of the opening edge of the bag. The vertical side opposite to the vertical side has exactly the same structure. As hand-held films, hand-held films 27 and 28 formed by bending the tips of the hanging films are fused to the edges of the hanging films, and can be hung with the hand-held films 27 and 28. Since the suspended gravity is supported by the oblique fusion lines 44 and 45, the handle portion is much stronger than when supported by finger holes. In FIGS. 11 and 12, the outside of the heat seal of the hand-fused portion is cut. By fusing this heat seal,
Fusion and cutting can be performed at the same time, but cutting the outside of the fusion line makes the connection of the handpiece stronger. In the second embodiment, the handheld films 27 and 28 are the hanging films 4.
The side edges of Nos. 1 and 42 were bent, and the creases were cut off to separate the hand film. Embodiments 3 and 4 have the same effect except that a hand-held film tape is supplied separately. The V-shaped fusing seal applied to the bottom folds 23 and 24 in Example 2 is the welding line 8 in FIG.
And 9 appear. The angle at which the fusion line 8 intersects the upper edge 10 of the middle longitudinal side film is perpendicular. This is because the tip of the V-shaped hot blade has a rounded curve. If the V-shaped shape is simply 45 degrees, this angle becomes an acute angle of 45 degrees and the strength is reduced. When this angle is an acute angle, gravity concentrates on the opening edges 13 and 14 and the opening edges 13 and 14 are easily broken. The bag of FIGS. 11 and 12 consists of a single continuous film folded and simply fused lines 8 and 9 as well as two fused lines on the opposite longitudinal side and an inclined fused line 4 on the hand strap.
It is formed by joining a total of eight fusion wires with the wires 4 and 45.

[0010]

According to the manufacturing method of the present invention, it is possible to efficiently manufacture a handbag suitable for storing an article having a wide width of the handbag film. The manufactured bag is particularly strong due to the configuration in which a rounded shape is provided at the tip of the V-shape and the configuration in which the hand-held film is attached to the hanging portion, so that the hand-held bag can be a strong and well-shaped bag. .

[Brief description of the drawings]

FIG. 1 is a rear view of a handbag manufactured by a manufacturing method according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line aa of the handbag of Example 1 and a vertical cross-sectional view of a gusset-folded band-like film.

FIG. 3 is a front view of the shopping bag of FIG. 1;

FIG. 4 is a view showing a state in which the handbag shown in FIG. 3 is folded.
It is sectional drawing of the b line.

FIG. 5 is a rear view of the handbag according to the second embodiment.

FIG. 6 is a front view of a handbag according to a second embodiment.

FIG. 7 is a vertical sectional view of a V-shaped sealing step according to the second embodiment.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a plan view showing an example of the shape of a V-shaped hot blade used in the present invention.

FIG. 10 is a plan view showing an example of the shape of a V-shaped hot blade used in the present invention.

FIG. 11 is a vertical side view of the usage state of the handbag manufactured in Example 2.

FIG. 12 is a lateral side view of the use state of the handbag manufactured in Example 2.

FIG. 13 is a front view of a handbag according to a third embodiment.

[Explanation of symbols]

F V-shaped film piece M Seal base N Seal base V ₁ , V ₂ V-shaped hot blade 1, 2 Hand-held part film 3, 4 Side-side film 5, 6, Medium-longitudinal-side film 7 Bottom film 8, 9 Fusion line 10, 20 Upper longitudinal side film upper edge 11, 12 Upper longitudinal side film 13, 14 Opening edge 15, 16 Square bottom corner 17, 18 Notched portion 21, 22 Folding edge 23, 24 Bottom fold 25, 26 Hand fold 27, 28 Hand-held film 29, 30 Heat seal 37, 38 Hand-held film tape 41, 42 Hanging film 43 Boundary fusing part 44, 45 Inclined fusion line

Claims (5)

(57) [Claims] 1. A parallel bottom fold 2 in which a plastic strip film is continuously fed to a gusset folding step and a bottom film 7 is provided on both sides of a center line of the strip film.
3 and the bottom fold 24, the both side edges of the band-shaped film are once bent downward and inward, and the lateral side films 3, on both sides of the bag body portion,
4, the side edges of the strip-shaped film are folded back again outward at the folded edges 21 and 22 at the inner edges of the lateral side films 3, 4 on both sides to form the suspended film portions 41 and 42. Then, the side edges of the band-shaped film outside the hanging film portions 41 and 42 are extended so as to protrude outside the bottom fold 23 and the bottom fold 24,
A gusset of the band-shaped film folded inward again by the hand-folded folds 25 and 26 on the side edges of the band-shaped film and superposed to form hand-held films 27 and 28, and folded by three pairs of symmetrical folds. A folded polymer is constructed, and then the gusset-fold polymer is intermittently fed into a V-shaped sealing process at a predetermined one-pitch transfer to form a strip-shaped film.
A V-shaped hot blade having a tip extending outward toward the center of the belt-like film is pressed against the hand-folded folds 25 and 26 on the boundary between the bags in the bag, and a welding seal is applied to the hand-folded folds 25 and 26. , 26 and the hanging film portions 41 and 42 and the hand film portions 27 and 28 are obliquely fused by V-shaped inclined fusion lines 44 and 45, respectively, and the fold side edges of the hand folds 25 and 26. The notch portions 17 and 18 are notched so that the hand-held portion films 27 and 28 are separated from the hanging film portions 41 and 42, and the belt-shaped film is separated.
And fusing the boundary of the bag body and the bag in the manufacturing method of the tote bag, which comprises fusing fixing the lateral side film 3,4 with the boundary fusing unit 43 to the bottom film 7. 2. A parallel bottom fold 2 in which a plastic strip film is continuously fed to a gusset folding step, and a bottom film 7 is provided on both sides of a center line of the strip film.
3 and the bottom fold 24, the both side edges of the band-shaped film are once bent downward and inward, and the lateral side films 3, on both sides of the bag body portion,
4, the side edges of the strip-shaped film are folded back again outward at the folded edges 21 and 22 at the inner edges of the lateral side films 3, 4 on both sides to form the suspended film portions 41 and 42. Then, the side edges of the band-shaped film outside the hanging film portions 41 and 42 are extended so as to protrude outside the bottom fold 23 and the bottom fold 24,
A gusset of the band-shaped film folded inward again by the hand-folded folds 25 and 26 on the side edges of the band-shaped film and superposed to form hand-held films 27 and 28, and folded by three pairs of symmetrical folds. A fold polymer is constructed, and then the gusset-fold polymer is intermittently fed into the V-shaped sealing step by a predetermined one-pitch transfer, and the seal base N and the bottom fold 24 inserted into the lower surface of the bottom fold 23 are formed. The bottom fold 23 and the bottom fold 24 of the belt-shaped film are pressed on a sealing table M inserted into the lower surface by a V-shaped hot blade that spreads toward the fold, thereby forming a bottom fold 23 on the boundary between the bag and the bag. A welding seal is applied to the bottom fold 24, and further, the V-shape is formed such that the tip ends of the hand-folded folds 25 and 26 on the boundary line between the bags are outwardly directed toward the center of the band-shaped film. The blades are pressed to form a welding seal, and the hanging film portions 41 and 42 and the hand film portions 27 and 28 above and below the hand-folded folds 25 and 26 are slanted by V-shaped inclined fusion lines 44 and 45, respectively. By fusing and punching out notches 17 and 18 at the fold side edges of the hand-held folds 25 and 26, the hand-held films 27 and 28 are separated from the hanging films 41 and 42 and the band-shaped film is bagged. A method for manufacturing a handbag, comprising cutting the boundary line between the body and the bag vertically. 3. A method for manufacturing a handbag according to claim 2, wherein the tip of the V-shaped hot blade pressed against the bottom folds 23 and 24 has a rounded curved shape. 4. A parallel bottom fold 2 in which a plastic strip film is continuously fed to a gusset folding step, and a bottom film 7 is provided on both sides of a center line of the strip film.
3 and the bottom fold 24, the both side edges of the band-shaped film are once bent downward and inward, and the lateral side films 3, on both sides of the bag body portion,
4, the side edges of the strip-shaped film are folded back again outward at the folded edges 21 and 22 at the inner edges of the lateral side films 3, 4 on both sides to form the suspended film portions 41 and 42. Then, the side edges of the band-shaped film outside the hanging film portions 41 and 42 are extended so as to protrude outside the bottom fold 23 and the bottom fold 24,
Along the protruding side edges of the strip film, hand-held film tapes 37 and 38 are supplied to overlap the side edges to construct a polymer in combination with the gusset-folding of the strip film and the hand-held film tape, The combination polymer is represented by V
Intermittently feeding a predetermined Wanpitchi transported shaped sealing step, into his film tape 37 on the boundary line of the bag body and the bag in the strip film with 38, V shape that extends outward toward the tip in the center of the strip-like film The V-shaped hot blades are pressed to form a welding seal, and the hand-held film tapes 37 and 38 are fused obliquely at V-shaped inclined lines, respectively, and the ends of the hand-held film tapes 37 and 38 are suspended, 42
And fusing the lateral side films (3, 4) to the bottom film (7) by fusing on the boundary between the bags in the belt-like film . 5. A parallel bottom fold 2 in which a plastic strip film is continuously fed to a gusset folding step, and a bottom film 7 is provided on both sides of a center line of the strip film.
3 and the bottom fold 24, the both side edges of the band-shaped film are once bent downward and inward, and the lateral side films 3, on both sides of the bag body portion,
4, the side edges of the strip-shaped film are folded back again outward at the folded edges 21 and 22 at the inner edges of the lateral side films 3, 4 on both sides to form the suspended film portions 41 and 42. Then, the side edges of the band-shaped film outside the hanging film portions 41 and 42 are extended so as to protrude outside the bottom fold 23 and the bottom fold 24,
Along the protruding side edges of the strip film, hand-held film tapes 37 and 38 are supplied to overlap the side edges to construct a polymer in combination with the gusset-folding of the strip film and the hand-held film tape, The combination polymer is represented by V
In the character-shaped sealing process, the film is intermittently fed at a predetermined one-pitch transfer, and on the seal table N inserted into the lower surface of the bottom fold 23 and the seal table M inserted in the lower surface of the bottom fold 24, the bottom fold 23 By pressing a V-shaped hot blade that spreads the bottom fold 24 toward the fold, a welding seal is applied to the bottom fold 23 and the bottom fold 24 on the boundary between the bag and the bag, and further, the bag and the bag A V-shaped hot blade having a tip extending toward the center of the belt-like film and extending outward is pressed against the hand-held film tapes 37 and 38 on the boundary line of, and a welding seal is applied to attach the hand-held film tapes 37 and 38 respectively. The filmstrips 41, 42 are hung obliquely at the character-shaped inclined lines, and the ends of the handheld film tapes 37, 38 are suspended.
A method for manufacturing a handbag, comprising: fixing a belt-shaped film to a side edge of the bag;