JP2012250752A - Side gusset bag with fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a side gusset bag having a structure folding both sides into a V shape to be largely opened, including both side gusset portions in the upper portion.SOLUTION: The side gusset bag is shaped with openable fasteners 2 provided in openings to store contents, thermally fusing the openable fasteners 2 with both sides of a web sheet 1 at right angles with the vertical direction of the web sheet with a space equivalent to the size of the side gusset bag interposed with sealing margins 3 left behind, and locating butting portions butting both side ends of the openable fasteners 2 inside each of the sealing margins 3 to make them the ends of the side gusset portions 4 by folding back both side ends of the web sheet 1, and forming cylindrical shapes by sealing them at each of the sealing margins 3. Furthermore, the side gusset bag with fasteners is shaped by forming the side gusset portions 4 by bending them by a former and the like, cutting them into individual gusset bags in the vicinities of the openable fasteners 2 and furthermore, fusing the bottoms by thermal sealing and the like.

Description

  In the side gusset bag having a structure in which both sides are folded in a V shape, the upper end and the lower end are sealed with a heat seal or the like so that the upper side gusset portion can be opened widely. A side with a fastener that is provided with a fitting so that the other side can be opened and closed, including the side gussets, and the opening can be opened and closed greatly, and the contents can be filled from the opening. It relates to gusset bags.

  Conventionally, one of the upper end and the lower end is heat-sealed so that the other becomes an opening for filling, and a bag body is formed by providing a fastener over the entire length in the width direction at a position closer to the inner side of the upper end portion. The zippered packaging bag is provided with a notch at the top edge of the bag body at both side edges so that the width of the top edge is narrower than the width of the bag body and the periphery of the notch is heat sealed. (See, for example, Patent Document 1).

JP 2009-18819 A (see claims, detailed description of the invention, and FIGS. 1 to 3)

The above-mentioned conventional packaging bag with a fastener is a flat-filled packaging bag having a flat cylindrical shape with the upper end being a filling mouth by heat-sealing the lower ends of the stacked front and back sheets. A bag body is formed, a fastener is provided over the entire length in the width direction at a position closer to the inside than the filling port on the inner surface on the upper end side of the bag body, and a space for cutting between the filling port on the upper end and the fastener After filling the contents from the filling port at the upper end, the fastener is closed and the entire length of the filling port at the upper end is heat-sealed to seal the contents for distribution. It is something to offer.
However, in the above prior art, the fastener is not attached to the gusset portion. As a result, the gusset portion is removed and the fastener is attached, and the gusset portion is heat sealed to be sealed with a flat surface with the fastener. It is. Therefore, there is a problem that the filling opening cannot be opened largely.
Because of such a small opening, there is a problem that it is narrow for filling and discharging the contents, and the opening degree that is an excellent part of the gusset bag cannot be widely used.

A first invention of the present invention capable of achieving the above object is a side gusset bag with a fastener as described in claim 1, and is as follows.
In a side gusset bag formed by folding from one web sheet and forming a gusset portion on both sides, an openable / closable fastener is provided at an opening for storing contents, and the fastener is disposed in the longitudinal direction of the web sheet. The web sheet is sealed at the both sides of the web sheet at a right angle with heat sealing at intervals corresponding to the size of the side gusset bag, and the both sides of the web sheet are folded to zip the inner side of the seal margin. The abutting portion that abuts both side ends of the side is positioned so as to be the end portion of the side gusset portion, and is sealed with a seal margin portion to form a cylindrical shape. Further, the side gusset portion is formed by bending with a homer or the like, cut into one piece or one piece near the fastener, and the bottom portion is welded with a heat seal or the like to form.

Since the side gusset bag with a fastener according to the present invention has the configuration as described above, the following effects are exhibited.
(1) The opening for filling and discharging the contents can be maximized, and when filling and discharging, the contents can be stored in a spoon, handle, etc., and directly put into and out of the bag, which is extremely effective.
(2) Since there are almost no steps including the gusset portion, it can be securely sealed with a fastener.
(3) When the side gusset bag is formed by heat sealing, the fitting claw as a fitting means of the fastener is not crushed and can be heat-sealed at the seal margin, so that the opening / closing operation can be freely opened and closed. There will be no hindrance.

In the side gusset bag with fasteners of the present invention, the fasteners are welded at appropriate intervals, leaving seal margins at both ends in parallel to the flow direction of one web sheet, and the seal margin portions are further bent, and the inside faces It is a schematic perspective view which shows a mode that it bends so that it may overlap, and it seals with a seal margin. It is a schematic perspective view which takes out and shows only the fastener part of the side gusset bag with a fastener of this invention. In the side gusset bag with a fastener of the present invention, it is a schematic perspective view showing a state in which a web sheet is bent and sealed at the end of the side gusset, and a side gusset is formed by a homer or the like. BRIEF DESCRIPTION OF THE DRAWINGS It is a completion figure of the side gusset bag with a fastener which is one Example of this invention, (a) is a perspective view, (b) is a front view, (c) is a bottom view. It is a completion figure of the side gusset bag with a fastener which is another Example of this invention, (a) is a perspective view, (b) is a front view, (c) is a bottom view.

  In a side gusset bag formed by folding from one web sheet and forming a gusset portion on both sides, an openable / closable fastener is provided at an opening for storing contents, and the fastener is disposed in the longitudinal direction of the web sheet. The web sheet is sealed at the both sides of the web sheet at a right angle with heat sealing at intervals corresponding to the size of the side gusset bag, and the both sides of the web sheet are folded to zip the inner side of the seal margin. The abutting portion that abuts both side ends of the side is positioned so as to be the end portion of the side gusset portion, and is sealed with a seal margin portion to form a cylindrical shape. Further, it is a side gusset bag with a fastener that is formed by bending it with a homer or the like to form a side gusset portion, cutting it into one piece or one piece near the fastener, and then welding the bottom portion with a heat seal or the like.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a side gusset bag with a fastener according to the present invention, in which a fastener is welded at appropriate intervals, leaving seal margins at both ends parallel to the flow direction of one web sheet, and the seal margin portion is further bent. FIG. 2 is a schematic perspective view showing a state in which the side gusset bag of the present invention is taken out, and FIG. 3 is a side perspective view with a fastener of the present invention. In the bag, the web sheet is folded and sealed at the position of the end of the side gusset, and a schematic perspective view showing a state in which the side gusset is formed with a homer or the like. FIG. 4 is a side gusset with fasteners according to an embodiment of the present invention. It is a completed drawing of a bag, (a) is a perspective view, (b) is a front view, (c) is a bottom view, and FIG. 5 is a fastener according to another embodiment of the present invention. Finished view of a side gusset bag, (a) shows the perspective view, (b) is a front view, (c) is a bottom view.
First, a side gusset bag with a fastener which is an object of the present invention is a gusset bag having folded portions on both sides of a flat bag, and one of the upper end and the lower end is heat-sealed so that the other can be opened and closed for filling and discharging. An attached opening is used, and the contents are filled from this opening.

Furthermore, it demonstrates in detail based on the Example shown on drawing.
For example, as shown in FIGS. 1 and 3, a heat-sealable synthetic resin sheet is used to feed out a web sheet 1 wound in a roll shape. First, in the longitudinal direction of the web sheet 1, a seal allowance 3 is provided at both ends. The fastener 2 such as a Magic (registered trademark) tape is welded so as not to cover the seal allowance 3. The fastener 2 is provided with a plurality of male claws on a belt-like base material regardless of the sex, and a fitting (hereinafter referred to as fastener 2) into which the male claws are fitted together is the size of the side gusset bag. Are sequentially welded in the vicinity of the opening 7 at intervals suitable for the above, and bent so that the inside of the seal margin 3 part of the web sheet 1 faces and overlaps, and is sealed as shown in FIG. 1 to form a cylindrical shape. . At this time, since the seal margin 3 is removed and the fastener 2 is welded, when the seal margin 3 is sealed, both end portions of the fastener 2 are abutted against each other, and do not overlap. Yes, the fastener 2 itself is not heated / pressurized when sealing with the seal margin 3 of the web sheet 1, and therefore, when fitting the fastener 2, the male nail portion which is an important fitting portion may be crushed. And does not hinder the opening and closing operation.

Next, it is formed by Homer as shown in FIG. At this time, the seal margin 3 is bent so as to be at the end of the side gusset portion 4.
Moreover, by forming in this way, as shown in FIG. 2, the fastener 2 is bent so as to follow the formation of the side gusset bag, and the abutting part 5 is formed so that the end part is abutted. is there.
Furthermore, as shown also in FIG. 4 or FIG. 5, the seal part 8 is formed by sealing with the bottom part 6 and the seal allowance 3, and is completed.
FIG. 5 shows another embodiment of the side gusset bag with a fastener according to the present invention, and an auxiliary seal portion 9 is further provided in the vicinity of the bottom portion 6 of the side gusset portion 4 so as to be easily self-supporting. is there.

  It can be used not only for side gusset bags with fasteners made of synthetic resin film made of heat seal but also for side gusset bags with fasteners made of other materials.

DESCRIPTION OF SYMBOLS 1 ... Web sheet 2 ... Fastener 3 ... Sealing cost 4 ... Side gusset part 5 ... Abutting part 6 ... Bottom part 7 ... Opening part 8 .... Seal part 9 ... Auxiliary seal part

Claims (1)

  In a side gusset bag formed by folding from one web sheet and forming a gusset portion on both sides, an openable / closable fastener is provided at an opening for storing contents, and the fastener is disposed in the longitudinal direction of the web sheet. The web sheet is sealed at the both sides of the web sheet at a right angle with heat sealing at intervals corresponding to the size of the side gusset bag, and the both sides of the web sheet are folded to zip the inner side of the seal margin. The abutting portion that abuts both side ends of the side is positioned so as to be the end portion of the side gusset portion, and is sealed with a seal margin portion to form a cylindrical shape. Further, a side gusset bag with a fastener is formed by forming a side gusset portion by bending it with a homer or the like, cutting it into one piece or one piece in the vicinity of the fastener, and further welding the bottom portion with a heat seal or the like.

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