CN101312889B

CN101312889B - Reclosable packages for vacuum, pressure and/or liquid containment

Info

Publication number: CN101312889B
Application number: CN2006800435577A
Authority: CN
Inventors: 大卫·J.·安齐尼; 鲁斯蒂·E.·凯尼格克雷默; 大卫·J.·马休斯; 拉尔斯·G.·维尔堡; 格林·罗素
Original assignee: Illinois Tool Works Inc
Current assignee: Illinois Tool Works Inc
Priority date: 2005-10-25
Filing date: 2006-10-25
Publication date: 2010-11-03
Anticipated expiration: 2026-10-25
Also published as: WO2007050690A1; CN101312889A; KR20080059404A; US20060093242A1; AU2006306190B2; AU2006306190A1; EP1951588A1

Abstract

Flexible containers that are hermetically resealable are disclosed herein. Each resealable container comprises a receptacle and a pair of plastic zipper strips. The zipper strips are flattened at the ends within the side seal regions and are joined to each other, without substantial deformation of the closure profiles, in respective transition areas substantially contiguous with the side seals. These transition areas of zipper strip joinder assist in providing a leakproof transition from the openable section of the zipper to the side seals, where the closure profiles are fused and flattened (i.e., crushed).

Description

The bag that is used for the Reclosable of vacuum, pressure and/or hydraulic seal

Related application

The application is the exercise question submitted on July 21st, 2004 for the part continuity application of 10/896,769 the U.S. Patent application of " Leakproof Zipper End Crush forReclosable Bag and Related Method of Manufacture " and requires the preceence of this patent application.

Technical field

The present invention relates generally to flexible container, for example pouch, bag or other bag, described container has the plastic fastener of Reclosable.Particularly, the present invention relates to be used for Reclosable sack, pouch or other bag of vacuum, pressure or hydraulic seal.

Background technology

In order to guarantee airtight or sealing, bag usually their pliability container of sealing to their osed top degree again after sealing is opened.The flexible container of many common Reclosables can not remain on container and open required vacuum, pressure or hydraulic seal characteristic before for the first time.

In many different application, need be provided under the normal or required running condition reclosable container that can leak fluid after slide fastener is closed.Even when having big pressure reduction between container inside and outside, this container also should keep sealing state.Term " sealing " is not meant under all temperature/pressure states all no leaks as used herein, and is meant in the scope of the temperature and pressure of required generation in the normal use of reclosable container and does not leak.

With regard to known collapsible, can find time, the slide fastener storage bag, slide fastener is opened; Article are placed in the bag; Slide fastener is closed, and uses the anchor fitting that penetrates the bag wall that bag is found time then.Bag is evacuated, and the compressible articles that is contained in wherein may be compressed very greatly, thus easier transportation and need still less storage area in fact.Wish that very ambient air does not leak in the rarefied inner space of bag into.This leakage causes vacuum leak.Wish very that also slide fastener do not open owing to the mechanical force that produces by accident in the operating process of bag.

Except those advantages relevant with the compression of stored article, the collapsible storage bag of finding time also has the advantage of following reason.For example, air is got rid of the growth of having restrained destructive organism (for example moth, moth and bacterium) from storage bag, and these organisms need oxygen to survive and breed.In addition, this bag (if correct sealing) is not subjected to the influence of moisture, because the result who does like this is exactly the growth of having restrained mould.

Do not have only the big compressible articles of clothes for example can be stored in collapsible, can find time and the storage bag of Reclosable in.For example, may in the reclosable bag of finding time, store the bulky items of making by little article (for example powder or particulate resins).Storage material can be this type: when in use being exposed in the air, make it be not suitable for its required purpose.If the reclosable bag sealing is made, the bulk contents inside in the bag will can not be exposed in the air so.

According to another application, reclosable bag can be filled under air environment, and is not evacuated.If this bag is placed under the low especially pressure, will there be bigger pressure reduction in the cargo aircraft of the cargo hold of for example described bag by having decompression and by gas lift so between bag inside and outside.In this case, pressure inside may be about 15psi, and exterior pressure can be ignored.Need this bag can not fold leak and slide fastener can not throw open under this situation.

So the another kind of the reclosable bag of can finding time is with in the packaging field of food production.After food product packets is opened and after part food is removed, by closing the Reclosable structure, and the inner space of finding time to wrap by the anchor fitting that penetrates the bag wall can store remaining food.Being starved of this bag and making perishable foods hold in a vacuum, be sealed, promptly is leak free.By preventing to be exposed in the air, can prolong the shelf-life of perishable foods.

Under other situation, need be provided at slide fastener by the reclosable bag that in normal use, liquid can be kept after closing again and can not leak.Preferably, this bag can bear predetermined pressure reduction (inner/outer), and can not leak out liquid from bag.

In the representative type structure, reclosable pouch, bag or other bag have the plastic fastener that comprises two outstanding zipper strips, and the end of described zipper strip extends into the sealed sides of flexible container.Usually, each zipper strip comprises closed side and flange or alar part (after this being called " flange ").Zipper strip is attached to the online of net materials by net is heat sealed on the zipper flanges.For the ease of forming side seal closely, the end of zipper strip is rolled usually.In the grinding operation process, apply heat and the pressure of q.s (for example passing through heated seal bars relative to each other), the end deliquescing or the thawing of zipper strip, distortion then.In cooling process, the fusion of the end that flattens of zipper strip.This hot grinding operation carries out under independent hot pressing state usually, perhaps carries out under the staggered seal state as the part of side seal distortion of vessel.Plastic fastener should " heat rolls " have produced transformation between " former state " (that is, not rolling) slide fastener and the slide fastener (being subject to exist the influence of leakage) that rolls.

Also need to continue to improve when slide fastener is closed again, to have the structure of the reclosable container of leak free inner space.Especially, need to improve reclosable container, described container has been eliminated leakage on those zones near container side seals of slide fastener.

Summary of the invention

But Fig. 1 has shown traditional collapsible evacuable storage bag 2, and described bag comprises that container 4, valve module 6 and slide fastener 8, described slide fastener are included in a pair of interlockable mutually outstanding zipper strip that can interosculate on its opposite end.Though do not illustrate in Fig. 1, traditional valve module 6 also generally includes cap, and described cap is stung on the part of the valve module on the outside that is arranged on container 4.Cap must be removed before container is evacuated, and was replaced after container is evacuated.The purpose of cap is the seal valve assembly, to prevent in the container that air admission finds time.

Before container 4 generally includes and rear wall or panel (making by thermoplastic film material usually), described wall or panel be sealed in the bottom by heat conduction and both sides combined together, have the container of the opening that internal capacity and slide fastener 8 be mounted thereon with formation.Alternatively, container 4 can be made by the thin-film network of folding up, and described folding forms the bottom of container.A wall of container 4 has hole (not shown in Fig. 1), and valve module 6 is installed in the hole.Container can be made of the outstanding layer of poly mixing that is clipped between nylon layer and the layer of polyethylene sheet material.But, can change the described material that comprises container, interact with the content that prevents and be stored in wherein.

In use, the material (not shown) of the article of one or more separation or one-tenth piece can be placed in container 4 inside, and slide fastener 8 is opened simultaneously, that is, the closed side of interlockable zipper strip breaks away from combination mutually simultaneously.After the article that will store or material be placed in the internal tank, the opening of container 4 can be by with the zipper strip force together and sealed, so that their mutual interlocking in closed side separately.Though zipper closure profiles can have many different structures, described structure must be a kind of structure that guarantees can form the leak free closure member on the opening of container.

Zipper strip can use and be commonly referred to " slide block " or " clip " and come force together across the device (not shown in figure 1) of slide fastener.The representative type slide block has the cross section of basic U-shaped, and each leg is arranged on the opposite side of slide fastener.Gap between slider legs is enough little, so that slide fastener only can pass through space of slider under slide fastener is in closed condition.Therefore, when slide block when the slide fastener of opening moves, this has the coarctate effect of the entering part of zipper strip.Can open slide fastener by pulling separable slide fastener upper flange, this will more specifically explain below.Slide block can use any required method to make, for example injection molding.Slide block can be molded by any suitable plastic, for example nylon, polypropylene, polystyrene, acetal, polyketone, polybutylene terephthalate (polybutylene terephthalate), high density polyethylene (HDPE), polycarbonate or ABS.

Slide fastener 8 is designed to form the leak free sealing member on the opening of container 4 when slide fastener 8 is closed.After slide fastener was closed, the internal capacity of container can be by being evacuated by check valve assembly 6 sucking-off air.Use traditional vacuum source, for example family expenses or vacuum for industrial use dust collecting fan, air can pass through valve module 6 amount discharge containers 4.Valve module 6 and slide fastener 8 keep the vacuum in the container 4 after vacuum source is removed.

Description of drawings

Front and the squab panel of container 4 is sealed on the zipper strip in a conventional manner by vertical heat conduction sealing respectively. Alternatively, interlockable zipper strip can be attached on the wallboard by adhesive tape or adhesive tape, and perhaps zipper profiles can be integratedly outstanding with net materials. Wall of a container can be formed by various types of air-locked thermoplastic web material. Preferred airtight thermoplastic is nylon, polyester, polyvinyl dichloride and ethylene-vinyl alcohol copolymer (Ethylene-vinyl alcohol). Net materials can be transparent or opaque.

In many reclosable bag, slide fastener comprises the zipper strip of a pair of mutual interlocking, and each zipper strip has separately along the substantially constant side of the interlocking portions of slide fastener. Each zipper strip also comprises upper and lower flange, and it extends in relative direction from each closed side. Each flange is used to form the thin net of the same material of closed side. Upper flange is as drawing flange, and it can be grasped and pull open, to open slide fastener. Usually, the end of zipper strip combines at the sidepiece of bag. Typical zipper joint has been shown among Fig. 2, and Fig. 2 shows a turning of this reclosable bag. Dotted line represents to comprise the middle body 10 of the slide fastener 8 of interlockable closed side, and each closed side comprises the closure elements of a plurality of sides separately. The end of zipper strip is fused together in zone 12, forms simultaneously container side seals 14. If the bag wall makes progress and extends above upper zipper flanges, side seal extend generally upward until cover the top margin of upright panel so. Side seal forms by heat and the pressure that applies q.s usually, fuses the closed side and it is flattened with the end at slide fastener, and this process is commonly called " heat rolls ".

The heat of closing element at the interlockable side seal on the zone 10 of slide fastener 8 rolls generation conversion 15 between the slide fastener that is not rolling and the slide fastener that rolls, roll slide fastener and easily form leak, by leak, fluid (gas or liquid) can enter the container of finding time or from wherein coming out. This leakage represents with dotted arrow in Fig. 2. [in order to simplify, do not roll slide fastener and the conversion 15 that rolls between the slide fastener is represented as straight line in Fig. 2. But, those skilled in the art may appreciate that when thermoplastic melted or make its fusing, it can not melt to form very rectilinear mode.

In process of production, it is enough wide that cross sealed forms, so that each half one of heat-seal areas 14 can be merged into two bags, as shown in Figure 3. The zone 14 of cross sealed sections by shearing along the line 16 that crosses slide fastener 8. The zone on shear line 16 right sides forms the cross sealed (chain of container is from left to right advanced among supposition Fig. 3) of the continuity of primary tank 4, and the zone in the left side of shear line 16 forms the main crossings sealing that closes on container 4 '.

The reservoir bag that can find time can be combined along 3 limits of rectangle by two films (for example by the heat conduction sealing) consist of. Alternatively, bag can consist of by folding reticulated film and at the opposite side of the folding net of side seal region heat seal. In order to keep the vacuum of reservoir bag inside, the slide fastener under the closed condition must provide at the opening part (that is, the 4th limit) of bag the seal of sealing. The hot crushed ends of slide fastener also must be airtight under the desired temperature/pressure state in normal use procedure.

In 10/896, No. 769 U.S. Patent application, propose by between the closed side of rolling and the closed side of not rolling, provide conversion eliminate that the closed side has been fused together but when not flattening air leak in the reservoir bag of finding time in the slide fastener junction. In the transition region above and below, zipper flanges is fused together. This is at first by being exerted pressure by the part of cross-hatched indication in Fig. 4 of slide fastener and supplying with ultrasonic energy and finish. The each several part of upper flange is 18 fusings in the zone; The each several part of lower flange is 20 fusings in the zone; And the each several part of closed side is in regional 22 deliquescing but do not flatten. Then,

zone

18,20 and 22 mid portion is rolled by heat, forming side seal region 14 (being represented by different cross-hatched) in Fig. 5, stays do not flatten

transition region

22a and 22b at the opposite side of side seal.

In addition, the 10/896th, No. 769 U.S. Patent Application Publication a kind of zipper end structure (being called " conversion "), it is the border (that is, the heat of the ultra-sonic welded of upper and lower flange part and closed side rolls part) of alloying material on three limits.Should " conversion " be set between (former state) slide fastener that does not roll and the part that rolls slide fastener." conversion " in the 10/896th, No. 769 U.S. Patent application makes the each several part weld together of closed side by ultra-sonic welded, and vertically the lateral seal element does not have substantial deformation, and forms by the middle part that heat rolls the zipper segment of this ultra-sonic welded.

Still with reference to Fig. 5, on the zone between transition region 22a and the 22b, in the side seal process, the closed side flattens.In the process of flattening, the thermoplastic material expansion of the part that flattens of closed side, and with the thermoplastic material and the net materials fusion of upper and lower flange.Above

transition region

22a and 22b, upper flange keeps fusing together on regional 18a and 18b.Below

transition region

22a and 22b, lower flange keeps fusing together at regional 20a and 20b.

As disclosed in 10/896, No. 769 U.S. Patent application, the angle and the anvil that have recessed face relative to each other by use make the zipper strip ultra-sonic welded finish said process on the cross hatched area shown in Fig. 4 together.More particularly, each angle and anvil all have the groove on the flat surfaces that is arranged on two coplanes.In welding process, the surface of the coplane of anvil is faced on the surface of the coplane at angle respectively, and the groove surface at angle is to the groove of anvil.The groove of anvil is used to guide slide fastener with respect to the angle in slide fastener/film traveling process, and also the groove of auxiliary angle is used for the closed side " maintenance " on transition region and cleaning is provided in welding process.The shaping surface of groove be in welding process (promptly, be combined in a time-out when the angle with anvil) contact the insertion portion of closed side with the pressure of scheduled volume, described pressure guarantees enough that the angle is ultrasonic and is connected on the zipper strip, but whether big to making the interlockable closure elements of side bear substantial deformation.The a pair of relative flat surfaces of angle and anvil makes the zipper upper flanges weld together, and another makes the zipper lower flanges weld together to relative flat surfaces.Fig. 4 shown be clipped between and engaged the part of (for example by the heat conduction sealing) slide fastener on each network edge part of membraneous material.Has only preceding net 56 shown in this view.[for the purpose of simplifying, the membraneous material of supposing net 56 is optically transparent, thereby slide fastener is appreciiable in Fig. 4.] welding region 22 is included in the material that occupies the aforementioned grooves on angle and the anvil in the welding operation process.

The each several part of zipper strip has been bonded in 18,20 and 22 (not shown among Fig. 4) of zone by ultra-sonic welded after, the relative net of packing film and the zipper strip that is attached to the continuity on it on machine, advance a packet length or a plurality of packet length.At ensuing control position, by heat conduction sealing cross sealed panel.More particularly, enough heat and pressure are applied to (with reference to Fig. 5) on the strip region 14, and described strip region extends transverse to slide fastener 8, rolls zipper strip and makes panel combine by the whole height of panel with heat.The zone that cross sealed 14 is ultrasonically welded within zipper strip (by the indication of the cross-hatched among Fig. 4) is overlapping.As shown in Figure 5, the width of cross sealed 14 is ultrasonically welded within together less than zipper strip and the width in the zone of overlapping intermediate portion.In this overlapping zone, the central area 10 of slide fastener 8 (that is, the closed side) rolled by heat, promptly flattens.Therefore, the interlockable closure elements of the side of each zipper strip bears substantial deformation.

As shown in Figure 5, the inboard of 14 ultra-sonic welded of the cross sealed on the slide fastener.Preferably, the line of ultra-sonic welded zone symmetry usually with the centerline collineation of cross sealed 14, the line of centers of cross sealed successively usually with the line conllinear of shearing, shown in dotted line 16.But, do not need accurate conllinear.When slide fastener 8 and packing film when line 16 is sheared, the packing on online 16 the side will be separated from the packing of the not cut-out on the opposite side of line 16, and cross sealed 14 will be divided into each side seal on each packing.

According to 10/896, the instruction of No. 769 U.S. Patent applications, net/the fastener assembly of Jian Qieing does not comprise three kinds of different structures: (a) each heat rolls zipper segment 70,72 (will be cut off at shear line 16 places), and wherein zipper strip is fused together, and the closed side distortion; (b) close on each ultrasonic

bond zipper segment

74,76 that heat

rolls zipper segment

70,72 in fact, wherein zipper strip is fused together and the fusion of closed side does not have substantial deformation, has therefore formed above-mentioned

transition region

22a and 22b; And (c) remaining zipper segment 78 (having an end that closes on corresponding ultra-sonic welded part in fact), wherein, zipper strip is interlockable, and can break away from conjunction with (that is, the closed side was both indeformable does not fuse together yet).

In order to produce the reclosable pouch of holding vacuum, pressure and/or liquid, bag or bag, determine when slide fastener is closed should between the closed side, have hard and contact closely.More particularly, determine, finish its sealing function in receivable mode in order to guarantee slide fastener, should be in predetermined scope at the percentum in the zone of the closed contact between the closed side.So be in those parts that employed term " closed contact " in the context of the slide fastener of closing refers to the zone on the interface of each side element of interlocking, described part when examining under a microscope between each closed side element, for example between hook element and post or the supporting member without any the gap.These zones very close to each other can be amplified by use razor shearing slide fastener and with cross section and can be shown.The enlarged drawing of production closed side (that is, so-called " multiview drawing "), and show that the side part of closed contact can make marks on picture.

Minimum and maximum closed contact zone can be represented as percentum, and the area of straight line contact is divided by total linear area utilized of a side thus.Determine also will to make that slide fastener is 33% as the minimum percent in the closed contact zone of pressure-sealing zipper well, and will make that also the largest percentage in the closed contact zone that slide fastener is opened and closed is 76%.Any slide fastener of percentum in 33% to 76% scope of believing the closed contact zone can be arranged on effectively in normal use and hold in the reclosable bag of vacuum, pressure and/or liquid.In case selected pressure-sealing zipper, Bao designer must select correct film length and the diaphragm seal integraty that is used for application-specific subsequently so.

In addition, each closed side of slide fastener should be of similar shape and component structure, thereby the themoplasticity zipper material passes this symmetry of side group and the rectangular distribution of interlocking.This will be convenient to have the zipper end reformation of flat surfaces and constant thickness or the formation of combination.

The specific embodiment

If satisfied the minimum design criteria of closed side, reclosable bag can only be limited by the length of the material that wraps parts so, i.e. net materials, net-net and net-zipper seal and zipper material.

Many dissimilar slide fasteners can be suitable as pressure-sealing zipper.According to disclosed various embodiment after this, pressure-sealing zipper can be incorporated in pouch or the bag in the following manner, and promptly pouch or bag can bear the big pressure reduction between pouch or bag inside and outside, and can not leak or accident is opened.Optionally, pouch or bag are suitable for receiving fluids, can not leak under the normal expectation state that uses or accident is opened.

The reclosable flexible container of sealing disclosed herein.Each resealable container comprises container and a pair of plastic fastener band.The end of described zipper strip in side seal region flattens and interosculated, not in the substantial deformation of closing on the closed side on each transition region of side seal substantially.These transition regions of zipper strip bonded assembly are auxiliary to provide airtight conversion from the opened part of slide fastener to side seal, and wherein said closed side fuses and flatten (that is, being rolled).

One aspect of the present invention is a reclosable bag, described bag comprises: slide fastener, described slide fastener comprises first and second zipper strips with the each several part that fuses together in first and second zipper end seal, described first zipper strip comprises first closed side with at least two outstanding elements and in the length of extending and be connected to first and second flanges on described first closed side on the relative direction, the each several part of described first and second flanges flattens in the border of described first and second zipper end seal, and described second zipper strip comprises second closed side with at least one outstanding element and is connected to the length of the 3rd flange on described second closed side, described outstanding element is installed between described two outstanding elements of described first closed side at least, the each several part of described the 3rd flange flattens in the border of described first and second zipper end seal, described first and second zipper end seal comprise that respectively the first and second substantially flat partial sums are first, the second and the 3rd limit is connected respectively to that described first and second substantially flats are partly gone up and at first and second transition regions that are connected on the 4th limit on first and second closed sides, wherein, the described first and the 3rd limit along each described first and second transition region, being fused on some described one part in described first and second zipper strips of described first and second closed sides apart from one another by in two outstanding elements farthest each, described each described at interval outstanding element does not farthest form parts; And, wherein along second limit of described first and second transition regions and at it in each, described first and second closed sides are out of shape and fuse together, but do not flatten, described alloying material along each end on described second limit respectively by one be connected to described first and the alloying material on the 3rd limit on; And container, described container comprises first and second panels, described first and second panels are engaged on described first and second zipper end seal, in first and second districts of panel joint, engage one another, described panel joint extends along the each several part on first and second limits of described container, do not cover described first and second zipper end seal of described container respectively, and described first and second panels are connected to each other by the 3rd district folding or by the panel joint that extends along the bottom of described container, wherein, described first to the 3rd flange is engaged on the described container along its length, and described second zipper strip does not join on the described container along the length of any the 4th flange.

The reclosable bag of another aspect of the present invention comprises: slide fastener, it comprises first and second zipper strips, described first and second zipper strips have the each several part that fuses together on first and second zipper end seal, described first zipper strip comprise first closed side with in the length of extending and be connected to first and second flanges on described first closed side on the relative direction, the each several part of described first and second flanges flattens in the border of described first and second zipper end seal, and described second zipper strip comprises and can and be connected to the length of the 3rd flange on described second closed side with second closed side of the described first closed side interlocking, the each several part of described the 3rd flange flattens in the border of described first and second zipper end seal, described first and second zipper end seal comprise first and second transition regions on the opposite end that is arranged on and is connected to described first and second closed sides respectively, on its three limits, limit the part of first and second substantially flats on the border of described first and second transition regions respectively, described first transition region comprises being out of shape of described first and second closed sides and local fusing is together but the first that does not flatten at least, and, described second transition region comprises being out of shape of described first and second closed sides and local fusing is together but the second portion that does not flatten at least, wherein, described the 3rd flange is longer than described first flange on the elevation direction, and extends beyond described first and second zipper end seal; And container, it comprises first and second panels, described first and second panels join on described first and second zipper end seal, in first and second districts of panel joint, engage one another, described panel joint extends described first and second zipper end seal that do not have overlapping described container respectively along the each several part on first and second limits of described container, and described first and second panels are connected to each other by the 3rd district folding or by the panel joint that extends along the bottom of described container, wherein, described first to the 3rd flange is engaged on described first panel by the whole width of described first panel, and each center main portion of described first to the 3rd flange does not join on described second panel.

The reclosable bag of another aspect of the present invention comprises: slide fastener, described slide fastener comprises first and second zipper strips with the each several part that fuses together in first and second zipper end seal, described first zipper strip comprises first closed side and in the length of extending and be connected to first and second flanges on described first closed side on the relative direction, the each several part of described first and second flanges flattens in the border of described first and second zipper end seal, and described second zipper strip comprise can with second closed side of the described first closed side interlocking and the length that is connected to the 3rd flange of described second closed side, the each several part of described the 3rd flange flattens in the border of described first and second zipper end seal, described first and second zipper end seal comprise first and second transition regions on the opposite end that is arranged on and is connected to described first and second closed sides respectively and limit the first and second substantially flat parts on the border of described first and second transition regions respectively on its three limits, described first transition region comprises being out of shape of described first and second closed sides and local fusing is together but the first that does not flatten at least, and described second transition zone comprises being out of shape of described first and second closed sides and local fusing is together but the second portion that does not flatten at least, wherein, third and fourth part of described first and second parts of adjacency respectively of described first and second closed sides forms passage betwixt, described passage in described third part is sealed by described first transition region at the one end, perhaps with the channel connection that forms by described first, described first except with the described channel connection place that forms by described third part sealed, and the described passage in described third part is sealed by described second transition region at one end place, perhaps with the channel connection that forms by described second portion, described second portion except with the described channel connection place that forms by described the 4th part sealed; And container, it comprises first and second panels, described first and second panels are engaged to described first and second zipper end seal, in first and second districts of panel joint, engage one another, described panel joint extends described first and second zipper end seal that do not have overlapping described container respectively along the each several part on first and second limits of described container, and described first and second panels are connected to each other by the 3rd district folding or by the panel joint that extends along the bottom of described container, wherein, described first to the 3rd flange is engaged on the described container along its length.

To disclose and advocate others of the present invention below.

But Fig. 1 is the accompanying drawing of isometric view that has shown a kind of collapsible evacuable storage bag of traditional type.

Fig. 2 is the accompanying drawing that shows the part of the conventional reclosable storage bag with hot side seal.

Fig. 3 is the accompanying drawing that has shown a step in the production of reclosable storage bag shown in Figure 2.

Fig. 4 and Fig. 5 be shown according to be used for type shown in Figure 1 collapsible, can find time, the accompanying drawing of each step in a kind of method that reclosable bag is made the leakproof zipper end seal part.

Fig. 6 is the accompanying drawing that schematically shows that has shown according to the cross section of the reclosable bag that is used for vacuum, pressure or fluid-tight of an embodiment of the invention.

Fig. 7 is the accompanying drawing of cross sectional view that has shown the slide fastener of the pressure-sealing zipper in the bag that is suitable as shown in Fig. 6 the type shown in the meaning property.

Fig. 8 is the accompanying drawing that has specifically shown the closed side of the slide fastener shown in Fig. 7.

Fig. 9 is the accompanying drawing that has shown the lateral plan of machine location, and described machine is used for three positions a pair of zipper strip of type shown in Fig. 7 is attached to the online of net materials.Described slide fastener and described net materials are not shown.

Figure 10 is the accompanying drawing that has shown the isometric view of all places in the machine that is set to be used for operate with predetermined order according to a kind of production method.

Figure 11 is the accompanying drawing that has shown the isometric view of one type the recessing bar that can use in the position that those closed sides described in Figure 10 do not flatten.

Figure 12 has shown according to the embodiment shown in Fig. 6 and has combined the accompanying drawing of front elevation at last turning of reclosable bag of the slide fastener of type shown in Fig. 7.

Figure 13 has shown that zip-tie is incorporated into the accompanying drawing of cross sectional view of the closed side on the transition region in the bag shown in Fig. 9, and described part is the dotted line 10-10 intercepting seen in Fig. 9.

Figure 14 is the accompanying drawing that schematically shows that has shown the cross section of the reclosable bag that is used for vacuum, pressure or fluid-tight according to another implementation of the invention.

Figure 15 is the accompanying drawing of cross sectional view that has shown the slide fastener of the pressure-sealing zipper in the bag that is suitable as shown in Figure 14 the type shown in the meaning property.

Carry out now with reference to accompanying drawing, components identical has identical reference number in the different accompanying drawings.

Reclosable pouch or bag according to an embodiment of the invention are illustrated schematically among Fig. 6 in the cross section mode. Reclosable bag comprises container 4, has 3 flange containment zipper to be installed in the vessel port on bag top. One of pressure-sealing zipper with 8a comprise closed side 28 with from the closed side 28 beginnings in relative side upwardly extending upper and

lower flange

24 and 26. Upper and

lower flange

24 and 26 is heat sealed on the wall or panel 4a of container at each

strip region

64 and 66, is shown X at Fig. 6 middle finger. Each is with the length of

shape district

64,66 stretch flange formabilities. Another zipper strip 8b comprises closed side 34 and faces the upper flange 30 of upper flange 34. Upper flange 30 is heat sealed on another wall or panel 4b of container 4 at the strip region 68 of stretch flange formability length. By only above the closed side zipper strip 8b being sealed on the container 4 on the flange 30, produce positive regulations and parameters effect, the pressure of internal tank or the mechanical force that is applied on the container are in reduced levels to the major general thus, be tending towards so that chamber wall 4b pulling away from closed side 34, rather than so that closed side 34 pullings away from closed side 28. As a comparison, if two zipper strips all have upper and lower flange, and four all flanges are sealed to the sidepiece of container, and so sufficiently high internal pressure can produce the enough stress that pulls open the closed side, open thus slide fastener and destroy sealing.

Upper flange

24 and 30 can be grasped by the user, and can be pulled open to open the slide fastener of closing. Adopt enough power manually zipper strip to be pressed together by the whole length along slide fastener, so that the closed side interlocking, the slide fastener that Reclosable is opened. Optionally, can close slide fastener with the slide block (not shown). Usually, this slide block presents the pattern of U-shaped folder, and described U-shaped folder is installed on the slide fastener, and is gapped with upper flange, and when slide block moved along any direction, the bottom bands of trouser legs of folder moved zipper profiles, the zipper segment combination that enters.

The structure of pressure-sealing zipper only is shown schematically among Fig. 6. The structure that is fit to incorporate into the typical pressure-sealing zipper in the bag shown in Fig. 6 specifically illustrates in Fig. 7. Zipper strip 8a comprises closed side 28 and from its upper and

lower flange

24 and 26 that extends in an opposite direction. Closed side 28 comprises a pair of monohook and does not have post or the support component of hook. The part of the outer surface of upper flange 24 is coated with one deck 38 low melting point thermoplastics (after this being called " sealant layer "), so that upper flange 38 is heat sealed on the chamber wall. Lower flange 26 has similar sealant layer 36 thereon. Another zipper strip 8b comprises closed side 34, in the face of the upper flange 30 of upper flange 24 with in the face of the short extension 32 of the smaller portions of lower flange 26. Closed side 34 also comprises a pair of monohook elements and does not have post or the support component of hook. The part of the outer surface of upper flange 30 is coated with sealant layer 40, so that upper flange 38 is heat sealed on another chamber wall.

Three flange zipper shown in Fig. 7 show with zoomed-in view in Fig. 8. Closed side 28 comprises from the

closure elements

42,44 and 46 of three outstanding side direction of base portion 29, has the upper and

lower flange

24 and 26 with integrally formed each end of base portion 29.

Element

44 and 46 is monohook elements, and element 42 is the posts that do not have hook. In the same manner, closed side 34 comprises

closure elements

48,50 and 52, the upper flange 30 of three side direction of extending from base portion and has short extension 32 with integrally formed each end of base portion 35.

Element

50 and 52 is monohook elements, and element 48 is the posts that do not have hook. When the closed side was interlocked fully, as shown in Figure 8, the monohook elements 52 of closed side 34 was arranged in the groove that is formed by the post 42 of closed side 28 and monohook elements 44 and is in contact with it; The monohook elements 44 of closed side 28 is arranged in the groove that the

monohook elements

50 and 52 by closed side 34 forms and is in contact with it; Etc.. Intimate contact area between each closed side is positioned at the above-mentioned scope that is suitable as the percentage of pressure-sealing zipper.

For the reclosable bag of type shown in Fig. 6 of the pressure-sealing zipper that guarantees to have the type shown in Fig. 7 can be under pressure again seal fluid, vacuum and air, zipper end must be sealed hermetically.

The present invention also imagines the formation of transition region, and it is that the closed side of rolling is isolated in the closed side of never rolling. Use description to now finish aforesaid a kind of method.

Fig. 9 is accompanying drawing, has shown the side view of the parts that are used for each side 4a that a pair of

zipper strip

8a and 8b with the type shown in Fig. 7 join folded net to and zipper seal position on the 4b (only display part). This zipper seal position comprises double

containment bar assembly

116 and 118 relative to each other. Double containment bar assembly 116 comprises and is fixed to reciprocating installing plate 146 and by the seal bar parallel to each other 142 and 144 of its carrying; Double containment bar assembly 118 comprises and being fixed on the reciprocating installing plate 152 and by the seal bar parallel to each other 148 and 150 of its carrying. Installing plate can move between extended position and retracted position by each cylinder (not shown), and described cylinder operates under the control of programmable logic controller (PLC) (PLC). A pair of

zipper guide blades

112 and 114 be set to seal bar each relative to each other the group between in-plane on have the gap therebetween.

According to a kind of production method, net advances on machine direction off and on, and is imported into a structure, and thus, when net advances when stopping, namely in the dwell time process, the sidepiece 4a of net and 4b will be arranged between double

containment bar assembly

116 and 118. With the net advance carry out simultaneously be, zipper strip 8a and the 8b of interlocking also are supplied at machine direction, and enter position shown in Figure 9 by

zipper guide blades

112 and 114 guiding, wherein, the lower flange of the length of zipper strip 8a is arranged between zipper guide blades 112 and the seal bar 142; The upper flange of the described length of zipper strip 8a is arranged between zipper guide blades 114 and the seal bar 117b; And the upper flange of the zipper strip 8b of equal length is arranged between zipper guide blades 114 and the seal bar 119b. The closed side is arranged in the gap between

zipper guide blades

112 and 114. Double containment bar assembly 118 also has seal bar 148, and seal bar 148 does not need to be heated when not having the 4th zipper flanges. Other seal bar 142,144 and 150 is heated.

The structure of this seal bar and operation are known.Usually, seal bar comprises the seal bar core with a pair of vertical passage, and described vertical passage holds thermocouple and electric heater respectively, and they all are electrically connected on the heat controller able to programme by electric wire.Thermocouple produces the electric signal of representing the seal bar core temperature, and described signal is received by heat controller.Heat controller is controlled the levels of current that is applied on the temperature booster according to thermal control program, and described thermal control program is designed for and makes the seal bar temperature remain in the boundary of being preset by system operator.

According to above-mentioned production method, at first, seal bar 142,144 and 150 is heated to required temperature.Then, adapter plate 146 and 152 as one man extends towards each plate.Fig. 9 has shown the adapter plate that is in retracted position.(not shown) in their extended position, the seal bar 144 of being heated presses against the upper flange of mesh portions 4a and zipper strip 8a on one side of zipper guide blades 114, and the seal bar 150 of being heated presses against the upper flange of mesh portions 4b and zipper strip 8b on the opposite side of zipper guide blades 114.Simultaneously, the seal bar 142 of being heated presses against the lower flange of mesh portions 4a and zipper strip 8a on one side of zipper guide blades 112, and unheated seal bar 148 (it is as support) presses against on the opposite side of zipper guide blades 112, and the support to zipper guide blades 112 is provided thus.Heat and pressure are applied in preset time.Adapter plate withdrawal then.In this operating process, net and slide fastener engage on three strip regions 64,66 and 68.Repeat above-mentioned zipper seal operation with the interval of regulation, in each standing time process, the packet length of pressure-sealing zipper partly is heat sealed on the packet length part of net materials.In succession stop between the number of times each at interval in, the distance that net/fastener assembly advances or guiding equals a packet length forward.

If net materials is the packing film of independent a slice, before enclosing slide fastener, net is folded so.Optionally, if net materials comprises two packing films, so before enclosing slide fastener or afterwards, carry out the operation bidirectional of the bottom of heat seal container.But, those skilled in the art will appreciate that zipper strip can be attached on the beam enclosure material individually, form interlocked relationship then and join to simultaneously on the net materials, in this case, do not use the configuration shown in Fig. 9.

After having finished the operation of each zipper seal, the net of joint and the slide fastener packet length of advancing.The net that engages and each length of slide fastener must be continuously by the steps shown in Figure 10.Net materials is by numeral 4 indications; The closed side of interlocking is by numeral 128 indications.The direction that net/slide fastener advances (that is machine direction) is indicated by arrow.

130 places in the position, the short part with slide fastener of little rectangular area is being crushed on before the side seal between first group of recessing bar that is heated (only having in Figure 10 is appreciiable, and another is in net 4 bottoms) relative to each other.Each recessing bar at 130 places such as preferably has at the flat

rectangular surfaces

122 and 124 of the coplane of width in the position, and groove 126 is between it.In this example, groove 126 has trapezoidal cross-sectional shape; But the shape of groove can change according to the function in the outside of the particular zipper that will use.

When the recessing bar that is heated of type shown in Figure 11 in the position 130 places when slide fastener extends, part closed side 128 is received between the groove opposite, groove opposite is designed to apply less power to sidepiece, does not have substantial deformation, and does not make that particularly the closed side flattens.The flat surfaces of recessing bar presses respectively and lower flange.The height of each recessing bar can approximate the height of slide fastener, means that heated grooved bars can not be heat sealed to net materials on the net materials, but its size constitutes and orientates as and acts on the slide fastener.Recessing bar disclosed herein can heat and is provided with to be similar to the top disclosed mode that is used for the zipper seal bar.

In the position 130, the temperature of recessing bar is high, and applied pressure is low.In this case, the part that is trapped in the flange between the recessing bar is heated and deliquescing, and the part that is trapped in the closed side between the groove opposite of recessing bar simultaneously is heated and deliquescing, but does not flatten.By the zone of recessing bar contact be similar to shown in Fig. 4 by

zone

18,20,22 cross hatched area that constitute, wherein the closed side of zipper segment is arranged on the zone 22.

When next working cycle begins, net and slide fastener are guided forward, and the same zipper segment in-position 132 of being pressed up to 130 places in the position is in this position, it is pressed in (only show one in Figure 10, another is in the bottom of net 4) between second group of heated grooved bars relative to each other.The recessing bar at 132 places can dispose and constitute the recessing bar that is equal to 130 places in the position substantially in the position.But in fact the recessing bar at 132 places to form than lower temperature of the recessing bar at 130 places, position and higher a little pressure in the position.In the operating process of the recessing bar at 132 places, position, the flange of slide fastener is heated once more, is heated to the degree of flange fusing specifically.In the example of the specific zipper construction shown in Fig. 8, extension 32 has also melted.In addition, the part between the groove that is trapped in recessing bar of closed side is heated once more, further makes this part deliquescing of closed side, and fusing somewhere, pay particular attention on farthest lateral seal element separately (referring to, the post among Fig. 8 42 and 48 for example).In addition, the part between the groove opposite that is trapped in recessing bar of closed side is heated, and does not flatten.132 places cover the zone that 130 places, position had before been contacted by recessing bar substantially by the zone of recessing bar contact in the position.

When next working cycle began, net and slide fastener be guiding forward again, and the identical slide fastener of being pressed up to 132 places in the position arrives side seal position 134.Position 134 comprises a pair of heat side seal bar (only show in Figure 10, another is in the bottom of net 4) relative to each other.The side seal bar structurally is similar to previously described zipper seal bar, but is parallel and be perpendicular to the slide fastener orientation, and length is not the length that equals to wrap, but equals height.Each side seal bar is smooth, is not provided for the groove in the gap of zipper closure profiles.130 and 132 places must be less than the width of recessing bar (for example be its 2/3) in the position for the width of side seal bar.Zipper segment should be set to its line of centers and aim at the line of centers of side seal bar substantially.

134 places in the position, the side seal bar by extension is heated forms the bag side seal thereby zipper/web is pressed in therebetween.Side seal bar at 134 places, position will melt between mesh portions and zipper material.130 and 132 places are preheated in the position owing to zipper segment, so the side seal bar will make easily that intervenient zipper segment (the intervention part that comprises the closed side) is rolled, promptly flatten.More particularly, flatten at the centre portion that is positioned at the 130 slide fastener zones that contact by recessing bar with 132 places before the side seal bar makes.Side seal region will be similar in the cross hatched area shown in Fig. 5 14, and regional 22a and 22b are illustrated in each transition region on the opposite side of side seal region once more.According to the composition of the film that uses, side seal can comprise by what work in-process was positioned at diverse location respectively organizes one or more operations that the side seal bar is finished.

Begin in next working cycle, net and slide fastener be guiding forward once more, the same zipper segment in-position 136 that flattens up to the part, 134 place in the position, herein, it is crushed between the 3rd group of recessing bar that is heated relative to each other and (has only shown one in Figure 10).136 places in the position, recessing bar can dispose and constitute the recessing bar that is equal to 130 and 132 places in the position substantially.But the recessing bar at 132 places forms and has than temperature that in fact recessing bar at 132 places is lower in the position and the pressure of Geng Gao in the position.In the operating process of the recessing bar at 136 places, position, any plastics obstacle that is produced by the side seal bar on the flange of slide fastener is flattened.In addition, the part that is trapped between the groove opposite of bar of fluting at 136 places, position of closed side does not flatten.The zone that 132 places are contacted by recessing bar in the position before basic covering the in zone of 136 places, position by the bar contact of slotting.In applied the heat and the process of pressure by the 3rd group of recessing bar, transition region will be present in the gap between the groove that faces one another on the bar, thereby and can not be flattened.

According to the method for optimizing of producing, all heat affected zone are cooled by being placed in freezing or contacting of unheated bar surface.Two kinds of operations that separate that this can provide by the cooling rod of correct design or finish with a kind of single operation.Figure 10 has shown the embodiment that cools off at two

positions

138 and 140 places, and is as follows:

When next working cycle begins, net and slide fastener are guided forward once more, the same zipper segment of being pressed up to 136 places in the position arrives first cool position 138, herein, it is crushed between the 4th group of freezing or unheated recessing bar relative to each other (only having shown one in Figure 10).The recessing bar at 138 places can dispose and constitute the recessing bar that is equal to 136 places in the position substantially in the position.In addition, the part that is trapped between the groove opposite of recessing bar at 138 places, position of closed side does not flatten.Be positioned at the zone that 136 places are contacted by recessing bar in the position before regional basic covering of 138 places by the recessing bar contact.In by the 4th group of process that recessing bar is exerted pressure, transition zone will be present in the gap between the groove that faces one another on the bar, thereby and can not be flattened.The recessing bar at 138 places is used for from the thermoplastic material draw heat that is heated before as heat sink in the position.Therefore the material of cooling will be included in the upper and lower flange on the heat treated zipper segment, and transition region.

When next working process began, net and slide fastener were guided forward once more, and the same zipper segment that is cooled up to 138 places in the position arrives second cool position 140.Position 140 comprises a pair of freezing or unheated side cooling rod (only show in Figure 10, another is positioned at the bottom of net 4) relative to each other.The side seal bar that the side cooling rod was described before being similar on the size and dimension.More particularly, the side cooling rod at 140 places has identical width with the side seal bar at 134 places in the position in the position.Each side cooling rod is smooth, and the groove in gap is not provided for zipper closure profiles.Zipper segment should be set to its line of centers and aim at the line of centers of side cooling rod substantially.This second cooling down operation relates to freezing or unheated smooth cooling rod placed with whole side seal region and contacts, whole side seal region is included in the zone that flattens (22a in Fig. 5 and 22b) between the transition region, but does not comprise the transition region of left side original state.

Cool position has obtained the required final shape of transition region and close region.After this, zipper/web assembly guiding forward once more.During next working cycle, slide fastener and net materials are along the straight cuts of splitting the side seal region that 134 places form in the position substantially.

Alternatively, one group of cooling rod can be designed to contact all above-mentioned zones (that is, by the zone of recessing bar contact and the zone that is contacted by the side seal bar) in a kind of operation.In this example, each cooling rod will have flat surfaces, and described flat surfaces is included in its first area of H shape of sidepiece and the second area that closes on described first area substantially and begin from the H side to extend downwards.H shape surf zone will be limited by each recess that the gap is provided by transition region, and its width equals the width of hot-cured zipper segment, and the width of second area equals the width of side seal region.

The result of aforesaid operations shown in Figure 12, and Figure 12 demonstrates the have pressure-sealing zipper turning of reclosable bag (type shown in Fig. 6) of (in type shown in Fig. 7).In order to illustrate, suppose that front panel 4a is optically transparent, and the preceding zipper strip of front panel 4a back (comprising closed side 28, upper flange 24 and lower flange 26) is an appreciiable.The front panel 4a of container extends above the upper flange 24 of zipper strip 8a, and has top margin 58.The back pkt. panel is located immediately at the rear portion of front panel, and extends upward the height identical with front panel (referring to Fig. 6).The whole height of front panel 4a is extended in side seal 14.Comprise that the transition zone 62 of the each several part of partial engagement closed side together at least at one end is connected to not rolling on the part of closed side, and at the other end substantially near side seal 14.In the zone of the above and below of transition region 62 and the topmost portion (and closing on transition zone 62) of closing on its side seal 14 formed usually in Figure 12 the zone that flattens by arrow 60 indications.Net and zipper material are fused together in zone 60.

According to a kind of method, the temperature and pressure of the recessing bar at 130,132,136 and 138 places makes transition region 62 have cross-sectional plane as shown in figure 13 in the position.Represented view is to intercept along the section line 13-13 shown in Figure 12 in Figure 13.Figure 13 has shown two zones 154 and 156, and zipper strip 8a and 8b fuse or be melted in together herein.Though in Figure 13, do not show single parts, the part that the zone 154 and 158 of each fusion has the post and a faying flange of a zipper strip with the relative partially fused zone of another zipper strip.For example, form in the fusion of the fusion area shown in Figure 13 154 by the 48 partial sum flanges 24 of the post shown in Fig. 8 and 30.Similarly, the fusion area shown in Figure 13 156 forms by the fusion of the part post 24 shown in Fig. 8, flange 26 and extension 32.Figure 13 has shown on the zone that is hooked in the part that is intercepted of single hook element of zipper strip 8a and 8b and has not fused together.Passage 158,160,162 and 164 shown in Figure 13 can not produce the leakage by the end of slide fastener, because the transition region 62 of the part that they are rolled in the closed side of closing on side seal 14 substantially is closed.

But transition zone 62 can form in the following manner: the hook of single hook element fuses together and is not similar to the passage shown in Figure 13.

One of problem that produces in producing suitable sealed packet is the mismatch of packaging element.If it is thick and heavy that slide fastener is compared with film, if perhaps slide fastener needs more substantial energy in order to produce sealing than film, the transition zone that rolls of slide fastener must carefully form to avoid leakage so.According to another embodiment, the contact area that will form transition region on the part of closed side may be coated with more low-melting material, and it allows to use lower heat to be provided with in transition region slide fastener to be adhered on himself.Therefore, reduced film damage, also produced leakproof zipper end seal simultaneously and eliminated or reduced and crossed the possibility that passage leaks.Coating can be made by the material that activates by hot, ultrasonic, radio frequency or ultraviolet energy, and needs fusing and welding sidepiece that these energy will be used in zipper profiles produce suitable airtight leak free position.The heat that advantage is to use is lowered in the reformation zone, assists thus to minimize or eliminate film damage, produces the leak free side seal simultaneously.The packaging element of this permission mismatch and coating material are incorporated into the combination on the zipper profiles.By to the more low-energy material of sidepiece increase, can solve effectively and the combination related problem of thick and heavy (high energy) slide fastener with thin (low energy) film.Coating will have lower energy requirement than base zipper material, more closely cooperate and the low energy film substrate thus.

Reclosable pouch according to another implementation of the invention or bag schematically show in the cross section mode in Figure 14.Reclosable bag comprises container 4, and described container has three flange containment zipper on the front panel 4a that is installed in bag.Slide fastener extends the whole width of bag, and the end of slide fastener is mixed to (not shown in Figure 14) in the side seal.Top sealing 90 before the top of bag engages with each boundary member of rear panel 4a and 4b.Though in Figure 14, shown the independent net container that forms of transverse sealing then by the FOLD AND PACK film, preceding and rear panel can form by net separately in addition, in this example, bag also will comprise the end sealing of each bottom boundary part that engages preceding and rear panel.

Still with reference to Figure 14, pressure-sealing zipper comprise closed side 80 with on relative direction from the closed side the 80 upper and

lower flanges

82 and 84 that begin to extend.Upper and

lower flange

82 and 84 is heat sealed on the front panel 4a in each band shape district 92 and 94.Another zipper strip comprises that closed side 86 and length are substantially greater than the lower flange 88 of upper flange 82.The part that extends beyond upper flange 82 of upper flange 88 is heat sealed on the front panel 4a in band shape district 96.The length that band

shape district

92,94 and 96 is parallel to slide fastener is extended, and zone 92 is arranged between the

zone

94 and 96.

The structure that is attached to the pressure-sealing zipper on the front panel 4a only schematically shows in Figure 14.The structure that is suitable for being incorporated into the typical pressure-sealing zipper in the bag shown in Figure 14 is shown specifically in Figure 15.Closed contact district between each closed side is positioned at the percentage range of pointing out previously that is suitable as pressure-sealing zipper.Zipper strip 8c comprise closed side 80 with on relative direction from its upper and lower flange 82 and 84 that begins to extend.Upper flange 82 is longer than lower flange 84 in side direction.Closed side 80 comprises a pair of single hook element and does not have the post or the supporting member of hook.The part of the outside face of upper flange 82 is coated with sealant layer 102, is convenient to upper flange 102 and is heat sealed on the front panel 4a.Lower flange 84 has identical sealant layer 100 on its outer surface.Another zipper strip 8d comprises that closed side 86 and length are substantially greater than the upper flange 88 of the length of upper flange 82.Zipper strip 8d does not have lower flange.Closed side 86 also comprises a pair of single hook element and does not have the post or the supporting member of hook.In the embodiment of this special pressure-sealing zipper, each post is mutually at a distance of farthest side element.The part of the inside face of upper flange 88 is coated with sealant layer 104, is convenient to upper flange 88 is heat sealed on the front panel.

Also comprise the peelable seal material layer 106 on the inside face of the upper flange 82 that is applied to zipper strip 8c at the slide fastener shown in Figure 15 and be applied to peelable seal material layer 108 on the inside face of upper flange 88 of zipper strip 8d.The peelable seal material layer has identical width, and extends on the whole length of zipper strip, and is provided with in mode relative to each other.

According to a kind of method of the pouch of type shown in production reclosable bag or Figure 14, slide fastener is attached to the online of packing film before net is folded again.Before slide fastener was attached on the net again, layer 106 and 108 was pressed together, and was heated to the degree that sealing (indication 98 among Figure 14) peeled off in the formation of peelable seal material layer.Peeling off after sealing activated, be attached to packing film online (referring to Figure 15) by pressurization and heated sealant agent layer 100,102 and 104 slide fasteners, under the temperature/pressure state, use the seal bar contact system simultaneously, be in the same place thereby sealant material is heat sealed with net, form the strip region 94,92 and 96 shown in Figure 14 thus.Then, net is folded, thereby its transverse edge aligns above slide fastener, will form top sealing 90 herein in the back.But before forming the top sealing, net/fastener assembly must be to be similar to the mode described with reference to the embodiment shown in Fig. 6 the front by transverse sealing.Described as the front with reference to Figure 10, use identical device to carry out identical step, its difference is that recessing bar must be by specific design, so that groove receives the closed side 8c shown in Figure 15 and 8d and it is flattened.The flat surfaces size of recessing bar also must be set to extend to from the edge of flange 82 and be connected in closed side 80 and extend to point of connection (with reference to Figure 15) with closed side 80 from the edge of flange 84, that is, the part of extending above flange 82 of flange 88 does not need to be included in the scope of zipper end seal.Under suitable operational circumstances, except zipper strip 8d was not similar to the extension 32 of the zipper strip 8d shown in Fig. 7, closed side 80 can form the transition zone that has with cross-sectional plane identical shown in Figure 13 with 86 part.But, if desired this extension can be set.

After forming transverse sealing and zipper end seal, bag or pouch shown in Figure 14 can filled with product.After filling up,, form net-net at the top of bag or pouch and engage 90 band shape district by traditional heat seal.Net/fastener assembly is sheared along continuous side seal region, to form independent bag or pouch.

Aforementioned process has formed has slide fastener that is attached on the front panel and reclosable bag or the pouch that extends the whole width of bag or pouch., the line of weakness, for example the line of perforation forms the position between the plate 4a online-zipper joint 92 and 96 in front at interval, shown in the short lines of the cross-section front panel 4a among Figure 14.Line of weakness can be before slide fastener be attached on the net or forms afterwards.The customer can be peeled off sealing 98 band that unzips then and obtains the content of not opening in bag or the pouch to open slide fastener by tear front panel 4a, strip off along line of weakness.

Bag or pouch with the end of using technology leak free slide fastener disclosed herein have been shown among Figure 14, and it is suitable for sealing vacuum, pressure or liquid and does not leak, even at bag or pouch has been opened or also not leakage after the sealing again.By with zipper seal to front panel, rather than on two panels, slide fastener will present low stress under pressure.More particularly, by slide fastener is arranged on the front panel, because the power that internal pressure produces will be perpendicular to slide fastener and all effects in one direction.All power is effect in one direction all, and opening resistance will be maximized.Front panel design also is actv. in the Stress Transfer with internal pressure to film and aspect slide fastener.Higher internal pressure wraps the situation that film is failed before can adapting to slide fastener sealing failure.

Rolling and not directly formation of the transition zone between the crushed closure profiles, use to be used for sealing.In order successfully to form tight transition area, pouch or bag processing machine can be set to have recessing bar, be used to make part slide fastener sidepiece and flange deliquescing and/or fusing, the number of positions that is used to form leakproof zipper end seal is not identical for all processing machines and membrane structure.In addition, set will be based on different linear velocities, available number of times, membrane structure and the machine types of stopping for the temperature and pressure that is used for heated grooved bars.

Alternatively, tight transition zones can use ultrasonic energy to form, to replace the heat conduction energy.In this case, heated grooved bars be provided with at every turn with by each angle/anvil to replacing, wherein anvil is emitted ultrasonic energy, and angle and anvil both have groove, it provides the gap for the part that is arranged on the closed side between angle and the anvil.The welding and the sealing of the ultrasonic material that is undertaken by sonic oscillation are the formation methods, and have been used to form the slider end braking on the end of the slider-operated slide fastener in reclosable bag, and are generally used for forming zipper joint.Representative type ultrasonic welding device (wherein, workpiece is supplied to by the ultrasonic bond position) comprises anvil and the sympathetic response angle that is oppositely arranged.The front surface of angle and anvil is impelled to engage one another, and is used for making the thermoplastic material that is coupled to workpiece from the ultrasonic vibration of activated horn, realizes ultrasonic bond thus.The angle gives voltage by power supply, and described power supply provides high-frequency electrical energy with predetermined supersonic frequency to electro-acoustic transducer, and described electro-acoustic transducer provides the mechanical vibration of this frequency for successively pressure regulator or coupling angle, is used for the angle is coupled in these vibrations.

Though in Fig. 6 or Figure 14, do not illustrate, can be installed in respectively in the front panel of the bag shown in Fig. 6 and 14 at the check valve of the type shown in Fig. 1 (indication 6), so that the inner space of bag is emptied by energy after the sealing again at slide fastener.

Though described the present invention, it will be appreciated by those skilled in the art that and to carry out various changes, and in not departing from the scope of the present invention, can substitute its element with IF-AND-ONLY-IF element with reference to various embodiments.In addition, can carry out many improvement, not break away from the particular case that adapts to the present invention's instruction under its base region.Therefore, the present invention is used to realize the disclosed specific implementations of best mode of the present invention in order to be restricted to, but the present invention will comprise all embodiments that drop in the claim scope of enclosing.

Employed in the claims term " joint " meaning is fusion, welding or heat seal.Employed in the claims term " bag " meaning is bag, pouch or other flexible container.

Claims

1. reclosable bag comprises:

Slide fastener, described slide fastener comprises first and second zipper strips, this first and second zipper strip has the each several part that fuses together at the first and second zipper end seal places, described first zipper strip comprises the length of first closed side with at least two outstanding elements, and extending on the relative direction and be connected to first and second flanges on described first closed side, the each several part of described first and second flanges flattens in the border of described first and second zipper end seal, and described second zipper strip comprises the length and the 3rd flange that is connected on described second closed side of second closed side with at least one outstanding element, described outstanding element is installed between described two outstanding elements of described first closed side at least, the each several part of described the 3rd flange flattens in the border of described first and second zipper end seal, described first and second zipper end seal comprise that respectively the first and second substantially flat partial sums are first, the second and the 3rd limit is connected respectively to first and second transition regions on described first and second substantially flats part, wherein, the described first and the 3rd limit along each described first and second transition region, being fused on some described one part in described first and second zipper strips of described first and second closed sides apart from one another by in two outstanding elements farthest each, described each described at interval outstanding element does not farthest form parts; And, wherein along second limit of described first and second transition regions and in each of described first and second transition regions, described first and second closed sides are out of shape and fuse together, but do not flatten, described alloying material along each end on described second limit respectively by one be connected to described first and the alloying material on the 3rd limit on; With

Container; Comprise first and second panels; Described first and second panels are engaged on described first and second zipper end seal; First and second districts at the panel joint engage one another; Described panel joint extends along the each several part on first and second limits of described container; Do not cover respectively described first and second zipper end seal of described container; And described first and second panels are connected to each other by the 3rd district folding or by the panel joint that extends along the bottom of described container

Wherein, described first to the 3rd flange is engaged on the described container along its length, and described second zipper strip does not join on the described container along the length of any the 4th flange.

2. reclosable bag according to claim 1, wherein, the outside in described first and second districts of described first and second zipper end seal and panel joint, described first and second flanges only are engaged on described first panel, and described the 3rd flange only is engaged on described second panel.

3. reclosable bag according to claim 1, wherein, the outside in described first and second districts of described first and second zipper end seal and panel joint, described first to the 3rd flange only is engaged on described first panel, and described first flange is between the described second and the 3rd flange.

4. reclosable bag according to claim 3, wherein, described first and second panels are engaged one another in third and fourth district of panel joint on the top of described container and bottom respectively.

5. reclosable bag according to claim 1, wherein, described first district of described first zipper end seal and described panel joint has each edge of conllinear, and described second district of described second zipper end seal and described panel joint has each edge of conllinear.

6. reclosable bag according to claim 1, wherein, described first and second closed sides have the contact area in 33% to 76% scope.

7. reclosable bag according to claim 1, wherein, each described first and second closed side comprises the outstanding element of two hook-types and does not have the outstanding element of hook.

8. reclosable bag according to claim 1 also is included in the food of described internal tank.

9. reclosable bag according to claim 1 also is included in the liquid of described internal tank.

10. reclosable bag according to claim 1 also is included in the pressurized air of described internal tank.

11. reclosable bag according to claim 1 also comprises along its length joining the sealing of peeling off on the described first and the 3rd flange to.

12. reclosable bag according to claim 3 also comprises the line of weakness on the part that joins the each several part on the described first and the 3rd flange to of described first panel of the connection that is formed on described first panel.

13. reclosable bag according to claim 1, also be included in the material between the part in described first and second transition regions of described first and second closed sides, described first and second transition regions melt under the temperature of the temperature that is lower than the zipper material fusing.

14. reclosable bag according to claim 1, wherein, described the 3rd flange is longer than described first flange on the elevation direction, and extends above the described first and the 3rd zipper end seal.

15. a reclosable bag comprises:

Slide fastener, it comprises first and second zipper strips, described first and second zipper strips have the each several part that fuses together on first and second zipper end seal, the length that described first zipper strip comprises first closed side with extending on the relative direction and be connected to first and second flanges on described first closed side, the each several part of described first and second flanges flattens in the border of described first and second zipper end seal, and described second zipper strip comprises and can and be connected to the 3rd flange on described second closed side with the length of second closed side of the described first closed side interlocking, the each several part of described the 3rd flange flattens in the border of described first and second zipper end seal, described first and second zipper end seal comprise first and second transition regions on the opposite end that is arranged on described first and second closed sides respectively, on its three limits, limit the part of first and second substantially flats on the border of described first and second transition regions respectively, described first transition region comprises being out of shape of described first and second closed sides and local fusing is together but the first that does not flatten at least, and, described second transition region comprises being out of shape of described first and second closed sides and local fusing is together but the second portion that does not flatten at least, wherein, described the 3rd flange is longer than described first flange on the elevation direction, and extends beyond described first and second zipper end seal; With

Container, it comprises first and second panels, described first and second panels join on described first and second zipper end seal, in first and second districts of panel joint, engage one another, described panel joint extends described first and second zipper end seal that do not have overlapping described container respectively along the first and second limit each several parts of described container, and described first and second panels are connected to each other by the 3rd district folding or by the panel joint that extends along the bottom of described container, wherein, described first to the 3rd flange is engaged on described first panel by the whole width of described first panel, and each center main portion of described first to the 3rd flange does not join on described second panel.

16. reclosable bag according to claim 15, wherein, described first and second panels are engaged one another in third and fourth district of the top of described container and the panel joint on the bottom respectively.

17. reclosable bag according to claim 15, wherein, described first district of described first zipper end seal and panel has each edge of conllinear, and described second district of described second zipper end seal and panel joint has each edge of conllinear.

18. reclosable bag according to claim 15, wherein, described first and second closed sides have the contact area in 33% to 76% scope.

19. reclosable bag according to claim 15 also comprises the line of weakness on the part that joins the each several part on the described first and the 3rd flange to of described first panel of the connection that is formed on described first panel.

20. a reclosable bag comprises:

Slide fastener, described slide fastener comprises first and second zipper strips with the each several part that fuses together in first and second zipper end seal, described first zipper strip comprises the length of first closed side, and extending on the relative direction and be connected to first and second flanges on described first closed side, the each several part of described first and second flanges flattens in the border of described first and second zipper end seal, and described second zipper strip comprise can with the length of second closed side of the described first closed side interlocking and the 3rd flange that is connected to described second closed side, the each several part of described the 3rd flange flattens in the border of described first and second zipper end seal, described first and second zipper end seal comprise first and second transition regions on the opposite end that is arranged on described first and second closed sides respectively and limit the first and second substantially flat parts on the border of described first and second transition regions respectively on its three limits, described first transition region comprises being out of shape of described first and second closed sides and local fusing is together but the first that does not flatten at least, and described second transition zone comprises being out of shape of described first and second closed sides and local fusing is together but the second portion that does not flatten at least, wherein, third and fourth part of described first and second parts of adjacency respectively of described first and second closed sides forms passage betwixt, described passage in described third part is sealed by described first transition region at the one end, perhaps with the channel connection that forms by described first, described first except with the described channel connection place that forms by described third part sealed, and the described passage in described the 4th part is sealed by described second transition region at one end place, perhaps with the channel connection that forms by described second portion, described second portion except with the described channel connection place that forms by described the 4th part sealed; With

Container, it comprises first and second panels, described first and second panels are engaged to described first and second zipper end seal, in first and second districts of panel joint, engage one another, described panel joint extends described first and second zipper end seal that do not have overlapping described container respectively along the each several part on first and second limits of described container, and described first and second panels are connected to each other by the 3rd district folding or by the panel joint that extends along the bottom of described container, wherein, described first to the 3rd flange is engaged on the described container along its length.