JP2006232374A - Bag with zipper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag having a zipper which can be accurately opened by hands, even when a material, having no directional property for generating cuts when two sheets forming the bag are torn, is used. <P>SOLUTION: A perforation 13 for tearing is provided over the whole length in the width direction, on the end part corresponding to an opening part side on a bag made of two sheets 12 and 12. To the inner face sides, facing each other of these sheets 12 and 12, a belt-like sheet 14 and the zipper 15 are welded in parallel, respectively at a position of the perforation 13 and at a position further inside than this belt-like sheet 14. The end parts, corresponding to the opening part sides of the bag of two sheets 12 and 12, are welded at a position farther outside than the perforation 13 by a heat seal part 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a zippered bag in which a mouth part for taking out contents can be opened and closed by a zipper, and the contents can be repeatedly housed and taken out.

  Among the bags used as storage containers for various products, there is a zippered bag that can repeatedly store and take out the contents.

  As shown in FIGS. 5 (a) and 5 (b), a conventional bag with a zipper has thermoplasticity on two sheets 2 and 2 that form a bag 1 with a zipper by welding the periphery in an overlapped state. Using a material having moisture resistance, the male zipper 4 and the female zipper 5 that become the zipper 3 are opposed to the inner surfaces of the two sheets 2 and 2 that face each other at the mouth side of the bag 1. In the state where the zipper 3 is engaged with each other and welded in parallel over the entire length in the width direction, both ends and both sides of the two sheets 2 and 2 at the end corresponding to the mouth side of the bag 1 are positioned on both sides. The portion is welded by the heat seal portion 6, and in this state, the content is sealed and stored by filling the contents inside the zippered bag 1 from the bottom opening and then welding the bottom of the zippered bag 1. It has a structure.

  In order to open such a bag 1 with a zipper, the bag 1 with a zipper 1 is cut from the notch 7 for starting tearing between the zipper 3 and the heat seal part 6 at both side edges of the bag 1 with a zipper. The mouth side heat seal part 6 of the zippered bag 1 may be removed, and the contents can be taken out when the zipper 3 is opened, and the remaining contents can be sealed and stored again when the zipper 3 is closed.

  By the way, when the bag 1 with a zipper is opened by hand, a sheet cut is generated in parallel with the zipper 3 from the notch 7 for starting tearing, and the zippered bag 1 can be surely torn along the entire width direction. For this reason, conventionally, the two sheets 2 and 2 that form the zippered bag 1 are formed by tearing using a stretched material such as polypropylene that has a directional orientation in the cuts caused by tearing. The bag is made so that the direction of the cut is parallel to the zipper 3, and the cut at the time of opening is generated in parallel to the zipper 3.

  However, when the two sheets 2 and 2 that form the zippered bag 1 are made of a material that has no direction to break along the tear, such as polyethylene or moisture-proof paper, as shown in FIG. In addition, it is not known in which direction the cut A runs from the notch 7 for starting tearing, and the cut A bends in the middle of the width direction of the zippered bag 1 to reach the end or bites into the zipper 3 Such a situation occurs, and the zippered bag 1 cannot be opened accurately by hand.

  Therefore, the problem of the present invention is that the two sheets forming the zippered bag can be used by hand while maintaining the airtightness and moisture-proof property of the bag even when a material having no direction for tearing is generated. An object of the present invention is to provide a zippered bag that can be opened accurately.

  In order to solve the above-described problems, the present invention provides a perforation for tearing at an end portion corresponding to a mouth portion side of a bag of two sheets forming a bag by welding the periphery in an overlapped state. Is applied over the entire length in the width direction, and with respect to the inner surfaces of the sheet facing each other, a belt-like sheet is provided at the perforation position, and a zipper is provided at a position closer to the inner side than the belt-like sheet. The end portion corresponding to the mouth portion side of the bag of the two sheets is welded at a position outside the perforation of the overlapped belt-like sheet.

  Here, the perforation for tearing provided on the two sheets is sealed by a belt-like sheet welded to the inner surface, and the perforation provided on the two sheets does not reduce the sealing performance of the bag. At the time of opening, a cut will occur along the perforation in parallel with the zipper.

  Another invention is to cut the entire length in the longitudinal direction on the opposite inner surface side of the end portion corresponding to the mouth side of the bag of the two sheets forming the bag by welding the periphery in a superposed state. A belt-like sheet having a perforation for use, and a zipper at a position closer to the inner side than the belt-like sheet, each being welded in parallel over the entire length in the width direction, corresponding to the mouth side of the bag of the two sheets A configuration in which the end portion is welded at a position outside the perforation of the overlapped belt-like sheet is adopted.

  By providing a perforation on the belt-like sheet, the perforation for tearing is not required on the two sheets, there is no deterioration in the sealing property of the bag, and the cut is guided along the perforation of the belt-like sheet when the bag is opened. Will occur in parallel with the zipper.

  A cutout for starting tearing is provided at a position where at least one end of the welded portion on the mouth side of the two sheets overlaps with the perforation, or directionality in a cut generated by tearing the two sheets It can be formed using a material that does not.

  Here, the two sheets forming the bag are formed using a moisture-proof thermoplastic synthetic resin sheet that can be heat-sealed, or a cardboard sheet laminated with an equivalent sheet on the inner surface side.

  According to the present invention, the perforation for tearing is applied to the two sheets forming the bag by welding the periphery in an overlapped state over the entire length in the width direction, and the position of the perforation on the inner surface side of the sheets facing each other A belt-like sheet and a zipper at a position closer to the inner side than the belt-like sheet are welded in parallel over the entire length in the width direction, and the end corresponding to the mouth side of the bag of the two sheets is overlapped. When the bag is opened, the zipper cuts along the perforation when opening the bag, even if the two sheets are welded at a position outside the perforation. The bag can be opened accurately by hand, and the perforation for tearing provided on the two sheets is a belt-like sheet welded to the inner surface. Is sealed by preparative, it does not lower the sealability of the bag perforations subjected to two sheets.

  Further, the same effect as described above can be obtained by forming a perforation for tearing in the belt-like sheet and welding the belt-like sheet on the inner surface side of the two sheets forming the bag to make a bag.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A zippered bag 11 according to the first embodiment shown in FIGS. 1 and 2 is a sewing machine for tearing at the end corresponding to the mouth side of the two sheets 12 and 12 that are welded together in an overlapped state. The mesh 13 is applied over the entire length in the width direction, and the inner surface side of the sheets 12, 12 facing each other, the belt-like sheet 14 at the position of the perforation 13 and the zipper 15 at the inner side of the belt-like sheet 14. Are aligned in parallel with each other over the entire length in the width direction, and the end corresponding to the mouth side of the two sheets 12, 12 is positioned outside the perforation 13 of the belt-like sheets 14, 14 overlapped. It has a structure welded with.

  The two sheets 12 and 12 are made of a thermoplastic synthetic resin sheet such as a polyethylene-based resin that has moisture resistance and has no directionality in the cut generated by tearing, and can be heat-sealed, or a sheet having the same effect. The zipper 15 is composed of a male zipper 16 and a female zipper 17, and the inner surfaces of the two sheets 12, 12 facing each other are positioned closer to the inner side than the perforation 13. The sheets 12 and 12 are welded in parallel over the entire length in the width direction.

  The belt-like sheet 14 uses a thermoplastic synthetic resin that can be welded to the two sheets 12, 12, and is a long sheet having a width that fits between the zipper 15 and the mouth side end portions of the two sheets 12, 12. Is formed into a length corresponding to the width of the two sheets 12 and 12.

  To manufacture the zippered bag 11 according to the first embodiment, as shown in FIG. 2 (a), two sheets 12, 12 having perforations 13 in the width direction are opposed to each other, and FIG. And (c), on the inner surface side of the sheets 12, 12 facing each other, the belt-like sheet 14 is positioned at the perforation 13, and the one sheet 12 at a position closer to the inner side than the belt-like sheet 14 is male. A female zipper 17 is welded to the zipper 16 and the other sheet 12 in parallel over the entire length in the width direction.

  As described above, when the belt-like sheet 14 is welded to the inner surfaces of the two sheets 12 and 12 at the positions of the perforations 13, the perforation 13 is sealed from the inside, and the two sheets 12 and 12 are The airtightness and moisture resistance of the entire surface will be maintained.

  Since the welding of the belt-like sheet 14 to the two sheets 12 and 12 and the welding of the male zipper 16 and the female zipper 17 are simultaneously performed on both the sheets 12 and 12, respectively, between the overlapping belt-like sheets 14 and between the male zipper 16 and the female zipper. A plate for preventing welding is inserted between the zippers 17, and the welding process is performed in a state where the plate is sandwiched.

  The two sheets 12 and 12 in which the belt-like sheet 14 and the male zipper 16 and the female zipper 17 are welded as described above are overlapped with the male zipper 16 and the female zipper 17 engaged with each other as shown in FIG. The zipper with the bottom bottom open if the heat seal portions 18 and 19 weld the positions outside the perforation 13 and both sides at the end corresponding to the mouth side of the bag of the two sheets 12 and 12. The attached bag 11 can be manufactured.

  In this state, the contents can be hermetically stored by filling the contents inside the zippered bag 11 from the bottom opening and then welding the bottom of the zippered bag 11 to form the heat seal part 20. .

  The male zipper 16 and the female zipper 17 mesh with each other on the mouth side of the bag 11 with zipper, and the perforations 13 provided on the two sheets 12 and 12 are welded with the belt-like sheet 14, and further, the two belt-like sheets 14 that overlap each other. Since the two sheets 12 and 12 are welded together by the heat seal portion 18, the sealing performance inside the zippered bag 11 is maintained.

  In order to open the zippered bag 11 as described above, the zippered bag 11 is cut from the end of the perforation 13 at one side edge of the zippered bag 11, and the mouth side of the zippered bag 11 is opened. What is necessary is just to remove the heat seal part 18, and when opening, a break will occur along the perforation 13, and the break will be parallel to the zipper 15 even if the two sheets 12, 12 have no tearing directionality. The mouth portion of the zippered bag 11 can be surely cut by hand over the entire length in the width direction.

  After removing the mouth side heat seal part 18 of the bag 11 with the zipper as described above, the mouth part opens and the contents can be taken out if the meshing of the zipper 15 is released, and the zipper 15 is meshed and the mouth is opened. If the part is closed, the remaining contents can be sealed and stored again.

  Next, the zippered bag 11 of the second embodiment shown in FIGS. 3 and 4 omits the perforations 13 of the sheets 12 and 12 in the first embodiment described above, and further replaces the belt-like sheet 14. The bag is made by using the belt-like sheet 14a provided with the perforation 13a for tearing over the entire length in the length direction, and the same parts as those in the first embodiment are denoted by the same reference numerals and replaced with the description.

  The zippered bag 11 includes the belt-like sheet 14a and the belt-like sheet 14a on the opposite inner surfaces of the end portions corresponding to the mouth side of the bags of the two sheets 12 and 12 that are welded together in an overlapped state. The zipper 15 is welded in parallel to the entire length in the width direction at a position closer to the inside than the belt, and the end portions corresponding to the mouth side of the bags of the two sheets 12 and 12 are overlapped. It has the structure welded by the heat seal part 18 given to the position outside the perforation 13a.

  The two sheets 12 and 12 and the belt-like sheet 14a in the zippered bag 11 of the second embodiment are made in the same procedure using the same material as in the first embodiment, and the sewing machine Since the belt-like sheet 14a provided with the stitches 13a is welded to the inner surfaces of the two sheets 12 and 12, the perforation 13a does not lower the sealing property and moisture resistance of the two sheets 12 and 12.

  In order to open the bag 11 with a zipper as described above, the bag 11 with a zipper is cut from the notch 21 for starting tearing provided at a position overlapping with the perforation 13a on one or both side edges of the bag 11 with a zipper. It is only necessary to remove the mouth side heat seal portion 18 of the zippered bag 11, and the two sheets 12 and 12 are cut along the perforation 13a at the time of opening. Even if there is no directionality in the cuts generated by tearing the sheets 12, 12, the cuts are parallel to the zipper 15, and the full length in the width direction of the zippered bag 11 can be reliably cut by hand.

  After removing the mouth side heat seal portion 18 of the zippered bag 11 as described above, the contents can be taken out by releasing the meshing of the zipper 15 and opening the mouth, and the zipper 15 is meshed with the mouth. If the part is closed, the remaining contents can be sealed and stored again.

(A) is the principal part notch front view which shows the bag with a zipper of 1st Embodiment, (b) is an expanded longitudinal cross-sectional view which follows the arrow bb of (a) (A) thru | or (d) each is the expanded vertical side view which shows the manufacturing process of the said bag with a zipper in order. (A) is the principal part notch front view which shows the bag with a zipper of 2nd Embodiment, (b) is an expanded longitudinal cross-sectional view which follows the arrow bb of (a) The perspective view of the strip | belt-shaped tape used for the bag with a zipper of 2nd Embodiment (A) is a cutaway front view of a main part showing a conventional zippered bag, (b) is an enlarged longitudinal sectional view taken along arrow bb in (a), and (c) is when tearing the sheet material forming the bag Front view showing the shape of the cut when the cut has no directionality

Explanation of symbols

11 Zippered Bag 12 Sheet 13 Perforation 14 Strip Sheet 15 Zipper 16 Male Zipper 17 Female Zipper 18 Heat Seal Portion 19 Heat Seal Portion 20 Heat Seal Portion 21 Notch

Claims (4)

  A perforation for tearing is applied over the entire length in the width direction to the end corresponding to the mouth side of the bag of the two sheets forming the bag by welding the surroundings in an overlapped state, and the sheets are opposed to each other. A belt-like sheet at the perforation position and a zipper at a position closer to the inner side than the belt-like sheet are welded in parallel across the entire length in the width direction with respect to the inner surface side, and the mouth of the bag of the two sheets A zippered bag in which the end corresponding to the part side is welded at a position outside the perforation of the overlapped belt-like sheet.   A perforation for tearing is applied over the entire length in the longitudinal direction on the opposite inner surface side of the end portion corresponding to the mouth side of the bag of the two sheets forming the bag by welding the periphery in a superposed state. A zipper at a position closer to the inside than the belt-like sheet, and welded in parallel over the entire length in the width direction, and the end corresponding to the mouth side of the bag of the two sheets is overlapped A zippered bag welded at a position outside the perforation of the belt-like sheet.   The zippered bag according to claim 1 or 2, wherein a notch for starting tearing is provided at a position where at least one end of the welded portion on the mouth side of the two sheets overlaps with the perforation.   The zippered bag according to any one of claims 1 to 3, wherein the two sheets are formed using a material having no directionality at a cut generated by tearing.

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