JP2002534293A - Method of making a resealable pouch - Google Patents

Abstract

  (57) [Summary] 【Task】 A method of manufacturing a resealable loaded pouch includes a stack extending in a longitudinal direction of a sheet having an overlapped end and extending over a portion of an original width of the sheet, and a sheet formed from the overlap. (I) folding the thermoplastic sheet over the entire width of the original to form a folded sheet having a non-overlapping portion extending to the other end; (Ii) fusing the overlaps at regular intervals along the overlapped ends to form pockets of the same size with a plurality of wall ends fused along the sheet; (Iii) cutting the sheet along the fusion line across the sheet so as to form each pouch having a fused end and an extended flap portion, respectively; Through Te loaded with desired product, comprising the step of folding the extension flap (iv) over the mouth so as to form a flap around the pouch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method of making a resealable pouch such as used to contain tobacco, and in particular to a process for forming a standard tobacco pouch from a continuous roll of material. The present invention relates to a method for inserting a fastener into a pouch.

[0002]

[Prior art]

Tobacco pouches are typically formed from a thermoplastic material that can be fused to itself using a combination of heat and pressure. Typically, a continuous material, or web, is
Folded along the web from one side to the other side, this layer spans approximately one third along the width of the web, thus forming a double thickness web with this layer on one side A single layer of material extending from the double thickness to the opposite side of the web. Thus, the distance from one overlapped end to the double thickness tip is about the same as the distance from the double thickness portion of the web to the other end. The double thickness portions of the stacked webs are fused at predetermined intervals across the entire width of the web, and one continuous overlap formed by fusing in each pocket of the same size. The formed member is formed. The formed fused portion has an appropriate thickness. The longitudinally continuous pockets of the sheet are cut along the weld with a knife to form a respective pouch fused to each side with an extension flap approximately the same depth as the pouch depth. . Each of these pouches is filled with product and tobacco through the pouch's mouth. An extension flap of the pouch is folded under the pouch mouth and over the pouch mouth to form a flap around the pouch. A second layer of flap is formed around the base of the pouch to form a fully wrapped pouch. This method of wrapping prevents the contained contents from losing moisture or leaking before and during use.

[0003]

[Problems to be solved by the invention]

It is an object of the present invention to allow the product to be rehydrated during the forming process so as to allow the user to enhance the known moisture retention and to reduce product leakage before or during use of the pouch. It is an object of the present invention to provide a method for manufacturing a resealable pouch by inserting a sealable fastener into the pouch.

[0004]

[Means for Solving the Problems]

The present invention provides a method of making a resealable loaded pouch. The method comprises folding an overlapping portion extending longitudinally of the sheet having an overlapping end and extending over a portion of the original width of the sheet and a non-overlapping portion extending from the overlapping portion to the other end of the sheet. Folding the thermoplastic sheet over a portion of the original width so as to form a sheet that has been overlapped, and at regular intervals along the overlapping end, in a direction perpendicular to the overlapping end. Fusing the overlapping portions to form respective pockets of the same size, each having a plurality of wall edges fused along the longitudinal direction of the sheet; and Cutting the sheet along the line of the fusing portion over the entire width of the sheet so as to form each pouch each having an end and an extension flap portion; and On each pouch Filling, and folding the extension flap over the mouth to form a flap around the pouch. The method comprises the steps of: forming an overlapping portion of the sheet;
A resealable fastener is positioned on the sheet in a direction parallel to one end of the sheet, at a location just below the pouch mouth, and the resealable fastener has two internal A coupling closure strip, wherein each of said closure strips has a base, and wherein each base of said two internal coupling closure strips is connected to a surface facing an overlapping portion of a sheet while the strips are coupled together. Fusing each other, separating the closure strips from each other after fusing the resealable fastener, and joining them together after loading the pouch and before forming the extended flap on the pouch. .

[0005]

DETAILED DESCRIPTION OF THE INVENTION The fasteners are provided in the form of two internally coupled closure strips when provided at the coupled location. Typically, each strip is formed with a protrusion and is designed to mate with a complementary strip, and a flange extends from the side of the protrusion. In order to ensure a perfect alignment between the two complementary strips to ensure resealing, it is necessary that the closure strip be introduced and fixed in place while being joined. Any deviation between the two complementary strips will function to prevent adequate resealing of the fastener or create a resealing function that cannot be performed by the user. It is also essential to the process that when the pouch arrives at the loading position, the closure is in an uncoupled state. Both of these functions are performed in a manner described below.

[0006] The pouch is formed in a manner as described for the standard pouch,
The resealable fastener, in this bonded state, enters a forming process such that the thermoplastic sheet is folded over. The zipper is guided in the folded sheet in a position where it is fixed, i.e. just below the mouth of the pouch,
The flange of the closure strip is fused in place to the pouch material.
The fusion of the fasteners in the pouch while being joined ensures that the alignment between the complementary strips is maintained. Care must be taken that the flanges of the opposing complementary closure strips are not fused together. The material and the closure strip may be cooled in a cooling mechanism following the closure being fused to the pouch material to prevent elongation and wrinkling of the material that may be caused by heat buildup.

[0007] Following the fasteners are fused to the pouch material and, if necessary, cooled, the closure strips, which were previously joined together, are separated while maintaining the positioning of the complementary strips together. A plurality of opposing closure strips are positioned along a longitudinal direction of the sheet by a high-energy fusing method such as ultrasonic fusing, at a position corresponding to a position where a side fusing portion is formed to form a pouch. Are fused together at the position. Such fusion is approximately the same width as the side fusion zone,
By sealing the closure at the fusion location and "crushing" the closure with ultrasonic or high energy fusion, it functions to ensure proper positioning of the opposing closure. By utilizing ultrasonic welding or similar high energy welding, the opposing closures function such that the weld does not break during normal use of the pouch and forms a thin weld. The parts will be fixedly fused together so as not to adversely affect the visual effect of the pouch. In this situation, it is important to note that the fused closure is not bonded into the mouth of the pouch and is generally left unbonded during the remainder of the forming and loading process. Ultrasonic fusion is also designed to extend slightly beyond the width of the fastener for reasons which will become apparent hereinafter.

[0008] Once the fastener is fused in place, with respect to the width of the pouch, the fusion will cause the fusion of the closure to overlap the web in a manner similar to standard side fusion. Until formed. However, the side fusing portions preferably do not extend the same distance as the original fusing portions, as the fusing portions of the closure may cause back interference to the side fusing portions. Thus, the side welds are preferably fused from the layer of web to just below the closure flange and function to interfere with the extension of the closure weld below the flange. This interference is important to ensure that a hermetic seal is maintained from the web layer over the fastener. The guide strip used preferably extends throughout the pouch forming process to the location where the side fusing takes place, thus contributing to the secure location and tracking of the closure and material.

[0009] A continuous web of pouches formed with resealable fasteners secured within the pouch mouth, each forming a sealed pouch at each end,
It is cut at the center of the fusion zone. The resealable fastener is almost open. Possible partial closure of the fastener is prevented by compressed air blowing which can take place at the mouth of the pouch. Following the overall formation of each pouch, each of these pouches is loaded through the pouch mouth. A preferred application of the invention is the production of resealable tobacco pouches, but it is also possible to load the pouches with different products, such as foodstuffs.

[0010] The above description describes side fusing and a simultaneously performed cutting operation to form a very thin side seal while forming a thin fusing through the closure.
include. After loading of the product into the pouch, the fastener is sealed by pressure over the fastener. The pouch is preferably folded in the same manner as used in conventional pouch manufacture, with a first overlap formed between the loaded pouch and the base of the fastener. The fasteners are arranged so that the layers are formed in the same place as the conventional pouch, so that the capacity of the pouch is not affected. The second layer of flaps around the base of the pouch is formed similarly to a conventional pouch.

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Claims (12)

[Claims] 1. An overlapping portion extending longitudinally of a sheet having an overlapping end and extending over a portion of the original width of the sheet and a non-overlapping portion extending from the overlapping portion to the other end of the sheet. Like forming a folded sheet,
Folding the thermoplastic sheet over a portion of the original width, and fusing the overlap with a certain spacing along the overlapped end, in a direction perpendicular to the overlapped end Thereby forming respective pockets of the same size, each having a plurality of wall ends fused along the longitudinal direction of the sheet; and each of the mouth, the fused end and the extended flap portion. A step of cutting the sheet along the line of the fused portion over the entire width of the sheet so as to form each provided pouch, and a step of loading desired contents into each pouch through the opening, Folding an extension flap over the mouth to form a flap around the pouch.A method for manufacturing a resealable loaded pouch, comprising the steps of: Sealable A fastener is placed on the sheet in a direction parallel to one end of the sheet, just below the mouth of the pouch, at the intended position, and this resealable fastener attaches the two inner joining closure strips to the joining position. Wherein each of the closure strips has a base,
The base of each of the two interconnected closure strips is fused to each of the facing surfaces of the overlapping portions of the sheet while the strips are joined together, and the closure strip is fused with a resealable fastener. Later, separate from each other, and
A method of bonding together after loading into a pouch and before forming an extension flap on the pouch. 2. The method of claim 1, wherein said thermoplastic sheet is a sheet of polyethylene. 3. The sheet of claim 1, wherein the sheet is a laminate of thermoplastic material having one or more layers of the same or different thermoplastic materials, metallized or metal-coated sheet materials or paper webs. Or the second method. 4. The method according to claim 1, wherein the welding is performed by ultrasonic welding. 5. The method according to claim 1, wherein the base of each closure strip is provided with one or more flanges. 6. The method of claim 5, wherein the sheet overlap is fused to just below the flange of the closure strip. 7. The method according to claim 1, wherein the resealable fastener is cooled immediately after fusing the thermoplastic sheet. 8. After the extension flaps respectively formed on the respective pouches are loaded,
The method according to any of the preceding claims, wherein the folding is performed on the pouch at a position between the loaded pouch and the fastener base. 9. The method according to claim 1, wherein the flap is folded over the flap mouth and then around the base of the pouch. 10. The method according to claim 1, wherein the pouch is loaded with tobacco. 11. The thermoplastic sheet is provided from a continuous roll,
The method according to any one of claims 1 to 10. 12. The thermoplastic sheet according to claim 1, wherein the thermoplastic sheet is folded such that the distance from the overlapped end to the pouch mouth is equal to the distance from the pouch mouth to the end of the extension flap. Method 1.