JP5474446B2 - Zippered bag and its manufacturing method - Google Patents

Description

  The present invention relates to a bag in which a zipper composed of a male fitting portion and a female fitting portion is attached in an opening, and a manufacturing method thereof, and more particularly, the powder enters the female fitting portion and has a fitting strength. The present invention relates to a bag with a zipper that can prevent a drop and can automatically fill the contents in a bag with a zipper by a general automatic filling machine instead of a dedicated automatic filling machine, and a method for producing the same.

  In the zippered bag, the male fitting part of the zipper is used to prevent the powder from entering the female fitting part of the zipper, especially when the powder is filled, and causing problems such as poor fitting. Japanese Patent Laid-Open No. 2002-173154 discloses an invention in which the female fitting portion is covered with a cover film from the outside, and the fitting is performed with the cover film covered.

  However, when fitting is performed with the fitting portion covered with the cover film in this way, the cover film is interposed on the surfaces of the male and female fitting portions when fitted, so that the fitting strength May decrease and the sealing performance may deteriorate, or the fitting may be disengaged with a small force.

  Also, when resealing the zipper, it is usually judged by checking the fingertip feel and snapping sound whether or not this reseal has been completely performed. If they are present, it is difficult to confirm both of them, and there is a problem that usability deteriorates.

  In addition, since the fitting part is covered with the cover film, it is possible to prevent the powder from adhering or entering the fitting part, but it is possible to prevent the powder from adhering to the surface of the cover film itself. Therefore, it is impossible to prevent the fitting strength from being lowered by the powder adhering to the surface of the cover film.

  In particular, when the cover film is charged with static electricity, the powder becomes more likely to adhere.

  Next, in the case of an automatic filling machine for a standing pouch with a zipper, the zipper that is engaged in the bag making process is opened once, filled with the contents, and then the zipper is engaged again, Therefore, since a dedicated machine configured to heat seal the filling port outside the zipper is required, there is a problem that the equipment is expensive.

JP 2002-173154 A

  The first object of the present invention is that, in a bag with a zipper, the powder does not adhere to the fitting portion, the fitting strength does not decrease when the zipper is resealed, and the fitting of the fingertip is further achieved. It is to provide a bag with a zipper that can be confirmed by sound.

  A second object of the present invention is to provide a method for producing a bag with a zipper capable of automatically filling a bag with a zipper using a general automatic filling machine instead of a dedicated automatic filling machine.

In order to solve the above problems, the invention according to claim 1 is characterized in that a. In the bag formed by attaching a zipper comprising a male fitting part and a female fitting part in the opening of the bag body,
b. A cylindrical cover film is provided on the inside to cover the male fitting portion and the female fitting portion of the zipper from the inside in the bag, and the lower edge side and the upper edge side of the cover film are respectively formed on the bag body. Sealed on the inner surface,
c. After the bag body is filled with the contents, a mouth seal is applied outside the zipper,
d. The cut position for opening the opening of the bag body is set outside the position of the zipper and inside the seal part on the upper edge side of the cover film and the mouth seal part of the bag body,
e. When the bag body is cut at the cutting position of the bag body, the cover film is also cut together and the zipper is covered with the upper edge side left free, and the zipper is fitted to reseal the bag body First, fold the cover film free side into the bag body to the position inside the zipper, uncover the zipper, fit the zipper directly, and when resealing, release the zipper fit, By unwrapping the free side of the folded cover film and taking out the contents while covering the zipper again with this cover film, the contents or the powder of the contents adheres to the fitting part of the zipper and the fitting strength It is characterized by being configured to prevent the deterioration of the sealing performance and the sealing performance.

Further, an invention according to claim 2, in bag zipper of claim 1, wherein the cover film is characterized in that it is formed in advance cylinder.

Furthermore, the invention according to claim 3 is the bag with zipper according to claim 1 , wherein the lateral width when the cylindrical cover film is folded flat is set to be slightly smaller than the inner width of the bag body. It is characterized by that.

Furthermore, the tube the invention according to claim 4, in bag zipper according to claim 3, in order to form the cover film into a cylindrical shape, for sealing the ends of the two films or by extrusion formed on Jo, or, it is characterized in configuration Tona Rukoto formed in a cylindrical shape by attract both side ends of the single film performing stitching sealed together.

Furthermore, the invention according to claim 5 is the bag with a zipper according to any one of claims 1 to 4 , wherein the cover film is folded and sealed once by using an elastic cover film. When the zipper is opened later and the opening of the bag main body is opened, the folding is released by itself to cover the male fitting portion and the female fitting portion of the zipper.

Furthermore, the invention described in claim 6 is the bag zipper according to any one of claim 1 to 5, when cutting the opening of the bag body, wherein the cover film side is cut together It is characterized by that.

Furthermore, the invention described in claim 7 is the bag zipper according to any one of claim 1 to 6, when heat-sealing the upper and lower edges of the cover film to the inner surface of the bag body, the cover The film is heat-sealed by sandwiching a separator so that the inner surfaces of the film are not heat-sealed and applying a heat-seal bar from the outside of the bag body .

1. According to the invention of claim 1, the zipper in the opening is covered with the cover film when filling the contents, after heat sealing the opening of the bag, and when taking out the contents.
As a result, no contents such as powder adhere to the zipper, so that the zipper fitting strength is not insufficient and the sealing performance is not impaired.

In addition, if the bag opening is cut, the upper edge of the cover tape can be cut together or separately to make the upper edge of the cover tape free. The upper edge can be folded to the middle part from the zipper.
As a result, when the zipper is re-fitted, fitting can be performed with no contents attached, so that the fitting strength can be ensured as originally designed and the sealing performance is not deteriorated.

  Furthermore, when the zipper is fitted, the male and female fitting portions are directly fitted, so that the fitting can be confirmed by the touch of the fingertips and a snapping sound.

  Furthermore, when automatically filling the bag body, since the zipper remains open and covered with a cover film, the zipper is mounted in the bag opening in a closed state during filling. Unlike the bag, there is no need to open the zipper once during automatic filling.

Further, when filling the contents and sealing the opening, according to the bag with a zipper of the present invention, the opening can be sealed while the zipper is opened. There is no need to close the zipper again when sealing.
As a result, the contents can be automatically filled using a general automatic filling machine instead of a dedicated automatic filling machine, so there is no need to newly install a dedicated automatic filling machine. There is no cost and there is no need to secure the floor space in the factory.

  2. According to invention of Claims 2-4, it becomes easy to attach a cover film in a bag main body.

  3. According to the invention described in claim 5, when the zipper of the bag body is opened, the cover film that has been folded is opened by itself, so there is no need to return the folded cover film with a fingertip. is there.

  4). According to the invention described in claim 6, since the opening of the bag and the cutting of the cover film are performed at the same time, it does not take time and is convenient.

5. According to the invention described in claim 7 , since the cover film can be sealed to the inner surface of the bag body by a heat fusion method using a heat bar (heat seal method), the appearance of the currently used bag is changed. It can be retrofitted without any problems.

It is a front view of the self-supporting type zippered bag which implemented this invention. It is an AA 'line sectional view. It is sectional drawing of the bag of the state which filled the contents and sealed the opening part. It is explanatory drawing of the state which cut and opened the bag by the cut line of FIG. It is explanatory drawing of the state which has taken out the contents from the bag. It is explanatory drawing of the state which folded the free side of the cover film in from the zipper and closed the zipper. The form of a cover film is shown, (A) is the front view formed in the cylindrical shape by the two-way seal, (B) is a BB 'sectional view taken on the line. The form of a cover film is shown, (A) is the front view extruded and formed in the tube shape, (B) is CC 'sectional view taken on the line. The form of the cover film is shown, (A) is a front view in which both ends of the film are drawn and sealed to form a cylindrical shape, and (B) is a sectional view taken along the line DD ′. It is explanatory drawing formed in the shape of a circular arc inside the seal part of the both sides of a bag main body which is a part concerning a zipper in two cover films. It is explanatory drawing which shows the state of a cover film, (A) is the example which formed the protrusion part up and down, (B) is the example which formed the protrusion part only in the lower part. It is explanatory drawing of the bag main body which attached the cover film shown to FIG. 11 (A). It is explanatory drawing which shows an example of the attachment method of a cover film .

The present invention is applied to a bag having a zipper that can be used repeatedly and is for resealing in the bag mouth. As the form of the bag, it can be applied to a caseette type, a square bottom type, a three-side seal, a two-side seal, a pillow type, a standing type, and the like.
The bag is basically made of a resin film bag-formed by a heat-sealing (heat-sealing) method. However, the bag can also be applied to a resin film bag bag-made by sealing with an adhesive.

  The zipper used in the present invention is a type in which a male fitting portion and a female fitting portion are respectively formed on a base tape, or a male fitting portion and a female fitting portion directly on the inner surfaces of the front film and the back film. Including both forms formed.

If the film that forms the bag body is made by the heat seal method, each joint surface is laminated with a film that can be heat sealed, and a composite film that is suitable for each application Is used. These materials and composites are conventionally known and are not special in the present invention.
The zipper is generally made of polypropylene or polyethylene, and a special one is not used in the present invention.

An embodiment of the present invention will be described in detail with reference to FIGS.
A zipper 3 having a male fitting portion 4 and a female fitting portion 5 formed in the opening 2 is attached to the bag body 1 and outside the male die and the female fitting portions 4 and 5. The upper and lower edges of the cover films 6 and 7 are respectively sealed on the inner surfaces of the front film 1a and the back film 1b so as to cover the fitting portions 4 and 5, respectively.

  The cover films 6 and 7 have a cylindrical shape as shown in FIGS. 7 to 9, both sides are closed, and cover the zipper 3 in the bag body 1.

  In FIGS. 1 and 2, reference numeral 10 denotes an inverted V-shaped bottom film inserted into the bottom of the bag body 1. By inserting the bottom film 10, the bottom of the bag body 1 is expanded into a boat shape. Can be independent.

However, the shape of the bottom is not limited in the present invention, and the present invention is also applicable to a gusset bag, a three-side seal bag, a pillow packaging bag, or the like.
FIG. 3 shows a state in which the bag body 1 having the above-described configuration is filled with the contents a and the opening 2 of the bag body 1 is heat-sealed 11, and the contents a are filled in the state of FIG. At this time, the male fitting part 4 and the female fitting part 5 are covered with the cover films 6 and 7. In addition, the zipper 3 is covered with the cover films 6 and 7 and isolated from the contents a even after the contents a are filled and the opening 2 is heat-sealed 11.
As a result, the contents a do not touch the zipper 3.

  When the bag body 1 is cut along the cut line in FIG. 3 for opening, the cover films 6 and 7 are cut together to open the bag body 1 as shown in FIG. The sides 6a and 7a are free.

  For this reason, the cover films 6 and 7 are required to have a certain degree of independence (elasticity) so that they do not fall into the bag body 1 by themselves.

  FIG. 5 shows a situation in which the bag body 1 opened in this manner is tilted and the contents a are taken out from the inside.

  And the state which sealed the bag main body 1 again is shown in FIG. 6, and in the case of this sealing, the free sides 6a and 7a of the upper part of the cover films 6 and 7 are folded in from the zipper 3 to the inner side (lower side), Close the zipper 3. By doing so, the zipper 3 is isolated from the contents a even when resealed.

  When the bag body 1 is opened again, when the zipper 3 is opened, the press of the folded 12 portion of the cover films 6 and 7 is released, so that the folded 12 portion alone is elastic as shown in FIG. Restore and become independent.

  In addition, when the cover films 6 and 7 do not have a self-supporting restoring force, the fingertip is inserted into the opening 2 to cause the folding 12 portion.

  FIG. 10 shows a form in which the cut portions 14 are formed by cutting the both sides of the zipper 3 into an arc shape in the cylindrical cover films 6 and 7, and according to this form, the front film 1a and the back film 1b are formed. It is possible to thin the seal part on both sides.

  The condition is that the cover films 6 and 7 are formed in a cylindrical shape with both sides closed. As a method for forming this cylindrical shape, the two-way seal in FIG. There is a tape 13 insertion method of FIG.

  Further, as shown in FIG. 11 (A), a projecting portion 8a, 9a is formed on both sides of the cylindrical side so as to be related to a side seal (vertical seal 17 to be described later), or (B). As shown in FIG. 12, the bag body 1 to which the cover films 6 and 7 of FIG. 11 (A) are attached is shown as an example in FIG. 12, and the protrusions 8a and 9a are shown. Is sealed over the side seal portion of the bag body 1.

Reference example

This reference example shows an example of the method for attaching the cover film of the zippered bag of the present invention, and its outline is shown in FIG.
First, the back film 1b on which the zipper tape 3 on which the female fitting portion 5 is formed is bonded in the same manner as the front fill 1a on which the zipper tape 3 on which the male fitting portion 4 is formed is bonded to the inner surface in the longitudinal direction. Each of the front films 1a and the back film 1b is unrolled, and cylindrical cover films 6 and 7 are unrolled in the center of the front film 1a and the back film 1b. Further, a punching 16 is formed in the central portion of the pattern seal 15 and the position of the zipper tape 3 is determined so as to cross the punching portion 16, and the center of the punching portion 16 is formed on the surface film. 1a and the center of the pattern seal part 15 of the cover film 6 and the back film 1b and the cover film 7 are respectively heat-sealed and front In the punched portion 16 of the pattern seal portion 15, a vertical seal 17 of the bag body 1 is performed so as to cross the front film 1 a and the back film 1 b at a portion disengaged from the cover films 6, 7. Cover films 6 and 7 are attached by cutting the center of 17.
However, this bag-making example is an example, and other bag-making examples that can be easily considered by those skilled in the art are not excluded.

Claims (7)

a. In the bag formed by attaching a zipper comprising a male fitting part and a female fitting part in the opening of the bag body,
b. A cylindrical cover film is provided on the inside to cover the male fitting portion and the female fitting portion of the zipper from the inside in the bag, and the lower edge side and the upper edge side of the cover film are respectively formed on the bag body. Sealed on the inner surface,
c. After the bag body is filled with the contents, a mouth seal is applied outside the zipper,
d. The cut position for opening the opening of the bag body is set outside the position of the zipper and inside the seal part on the upper edge side of the cover film and the mouth seal part of the bag body,
e. When the bag body is cut at the cutting position of the bag body, the cover film is also cut together and the zipper is covered with the upper edge side left free, and the zipper is fitted to reseal the bag body First, fold the cover film free side into the bag body to the position inside the zipper, uncover the zipper, fit the zipper directly, and when resealing, release the zipper fit, By unwrapping the free side of the folded cover film and taking out the contents while covering the zipper again with this cover film, the contents or the powder of the contents adheres to the fitting part of the zipper and the fitting strength Is configured to prevent the deterioration of the sealing performance.
f. A bag with a zipper characterized by.   The zippered bag according to claim 1, wherein the cover film is formed in a cylindrical shape in advance.   The bag with a zipper according to claim 1, wherein the lateral width when the cylindrical cover film is folded flat is set to be slightly smaller than the inner width of the bag body.   In order to form the cover film into a cylindrical shape, both ends of two films are sealed, or formed into a tube shape by extrusion molding, or both sides of one film are drawn together and joined together. It forms in a cylinder shape by performing, The bag with a zipper of Claim 3 characterized by the above-mentioned.   By using an elastic cover film, once folded and sealed, the zipper is opened, and the opening of the bag body is opened. The zippered bag according to any one of claims 1 to 4, wherein each of the mold fitting portions is covered. The zippered bag according to any one of claims 1 to 5, wherein when the opening of the bag body is cut, the cover film side is also cut together. When the upper and lower edges of the cover film are heat-sealed to the inner surface of the bag body, the cover film is heat-sealed by sandwiching a separator so that the inner surfaces of the cover film are not heat-sealed and applying a heat seal bar from the outside of the bag body The bag with a zipper of any one of Claims 1 thru | or 6 characterized by these .

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