MXPA06001244A - Reclosable plastic bag - Google Patents

Abstract

The present invention provides a reclosable bag that is substantially impermeable to oxygen by using a nylon layer in the bag side wall material. A preferred embodiment uses a bag wall comprised of low density polyethylene (LDPE) and nylon. LDPE and nylon layers are laminated together. When used as a baby bottle liner, the bag is constructed and arranged to fit into a cavity of a baby bottle. The bag includes a continuous, profiled, elongated reclosable fastener. The continuous, profiled, elongated reclosable fastener has a first continuous elongated profile strip and a second continuous elongated profile strip. The first continuous elongated profile strip and the second continuous elongated profile strip are dimensioned to provide an airtight and/or watertight seal upon interconnection thereof. The fastener provides an airtight and watertight side seal at each end of the reclosable fastener. Each side seal connects an end of the reclosable fastener to an inside surface of a front wal l and an inside surface of a back wall of the liner.

Description

PLASTIC BAG THAT CAN BE CLOSED This is a continuation request in part of the US patent application series No. 10 / 360,184, which was filed on February 6, 2003 for a? retaining fastener, without tabs ", which was a divisional application of the patent application serial No. 09 / 524,439, which is now US Patent No. 6,576,278 entitled" re-closing coating for a bottle of baby and baby bottle with lining that can be closed again ".

BACKGROUND OF THE INVENTION This invention relates, in general, to resealable plastic bags, examples of which include re-closed food storage bags and reclosable liners of baby bottles or baby bottles for use with bottles that have a plastic lining that can be re-closed and that has properties that allow the lining to be reused. More specifically, this invention relates to the resealable, resealable, high strength plastic bag that has a a reclosable fastener for resealable closure of a bag such as a bottle liner and which is also oxygen-tight.

Resealable plastic bags, such as food bags, nutrition sacks and disposable bottle liners, resealable, are well known for offering convenient storage. A disadvantage of re-closed bags of the prior art is the strength of the walls but also the permeability of the bags to oxygen. No matter how sealed the resealable seal may be, it is known that oxygen passes through the wall material of the prior art bags thereby overcoming the seal that could be provided by a fastener that can be closed again It would be convenient to provide a resealable plastic bag, which can be used as a bottle liner, which is considerably stronger than the plastic bags of the prior art but which is also substantially watertight and airtight. By increasing the water tightness and air-tightness of the wall of the bag, the characteristics of the seal that can be closed again become even more valuable.

COMPENDIUM OF THE INVENTION Accordingly, it is an object of the invention to overcome the drawbacks of the prior art and in doing so to offer a reclosable plastic bag, which can be used as a resealable liner for baby bottles, and which is highly resistant to the permeation of moisture and oxygen. The bottle liner embodiment has a reclosable, elongated, profiled, continuous fastener sealed to the inner walls of the liner. The fastener that can be closed, lengthened, contoured, continuous has a first profile thread, elongated, continuous and a second profile thread, elongated, continuous. The first profile thread, elongated, continuous and the second profile thread, elongated, continuous have the size and dimensions to offer a hermetic seal to the air and / or water-tight after the interconnection of these.

Another object of the invention is to provide a bottle liner having an air-tight and / or watertight side seal at each end of the re-closable fastener. Each of the side seals connects one end of the reclosable fastener to an inner surface of a front wall and an inner surface of a back wall of the liner.

Still another object of the invention is to provide a bottle liner having a base with triangular connecting or bellows-shaped plate and an air-tight and watertight seal at the base in the form of a bellows.

Another object of the invention is to provide a lining for baby bottles in which the first profile thread, elongated, continuous and the second profile thread, elongated, continuous each has at least two hooks therein. The hooks in the first profile thread, elongated, continuous, or optionally the hooks of the second profile thread, elongated, continuous, are next to each other. In a variant of the invention, at least one of the hooks is at one end of the first profile thread, elongated, continuous. A second hook of the two hooks is located close to the hook of the end of the first profile thread, elongated, continuous.

Yet another object of the invention is to provide a bottle liner that includes a plurality of recesses, continuous along a length of each of the profile fillets. At least one of the recesses has the dimension to be resiliently coupled with one of the hooks, in one embodiment of the invention. In still another embodiment of the invention, at least two of the continuous recesses have the dimensions to be resiliently coupled with the hooks.

Still another object of the invention is to provide a liner for baby bottles in which at least one continuous recess in each of the fillets of the profile does not have the dimensions to be coupled with the hooks and, in a variant, provides at least one projection along a length of each of the fillets of the profile with the dimensions to fit securely in one of the continuous recesses in each of the fillets of the profile without the dimensions to be coupled with the hooks.

In a variant, at least one of the hooks in the first profile thread, elongated, continuous, is located near the center of the profile thread. In another variant of the invention, the hooks are distributed in a substantially symmetrical shape on two sides of a central axis of the profile thread.

In yet another embodiment, an object of the invention is to provide a reclosable fastener having a plurality of ridges on a back side of each of the profile fillets.

Another object of the invention is to provide a coating for baby bottles which has in this formula for infants. In this and other variants of the invention, the upper end seal is placed above the re-closable fastener to keep the formula or infants within the coating hermetically sealed.

In yet another object of the invention is to provide a bottle with the bottle liner described herein, and an infant feeding kit, which contains a plurality of bottle liner according to the invention. invention. The team has, as an option, a bottle and / or formula for infants.

In still another embodiment of the invention, the baby bottle coating has an additive that changes color when the temperature of the coating content increases or reaches a predetermined temperature range.

Another objective of the present invention is to solve these and other problems in the art, and serve a market that demands hundreds of millions of plastic liners, which can be closed again, for bottles, per year. The objects and features of the present invention, in addition to those specifically mentioned in the foregoing, will be apparent from the detailed description of the invention set forth below and in the drawings.

In a preferred embodiment, the material of the faces of the bag is composed of low density laminated polyethylene (LDPE) and nylon, that is, a laminate. The LDPE and the nylon of the faces of the bag have a higher tensile strength than the materials of the bags of the prior art, has a lower speed of water vapor transfer but the nylon layer also provides oxygen impermeability. When using a nylon layer, the bag is made to be considerably impermeable to oxygen, providing a storage bag that can better preserve perishables. Another preferred composition having bag walls made of a laminate of a nylon layer between polyethylene layers has a water vapor transfer rate of about 0.62 grams per 100 square inches of material per hour. The oxygen permeability of the film is (to be filled by Greg) [sic]. The reclosable seal of the bag uses a profile fillet composed of polyethylene or polypropylene and attached to the faces of the LDPE / nylon bag by heating or adhesive.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front plane view of a reclosable baby bottle liner of the present invention; Figure 2 is a view of the back plane of the liner of Figure 1; Figure 2A shows a cross section of the material that is used to make the walls of the bag shown in Figure 1 and 2 and the layers of nylon and low density polyethylene; Figure 3 is a side cross-sectional view of the liner of Figure 1; Figure 4 is a view of the front plane of the liner of Figure 1 through a side seal of the liner; Figure 5 is a front perspective view of the bottle liner of Figure 1 including formula for infants and a seal at the upper end above the reclosable fastener; Figure 6 is a front perspective view of an equipment of the present invention having a bottle with the bottle liner of Figure 1 thereon; Figure 7 is a front perspective view of a plurality of bottle lining chains in accordance with Figure 1; Figure 8 is a side view of the. Cross section of the lining for baby bottles of the figure 1 with a fastener that can be closed again, lengthened, profiled, continuous, that is to say, a fastener that can be closed again, with flanges; Y Figure 9 is a side view of the cross section of a reclosable fastener used with the bottle liner of the present invention; Figure 10 is a front view of the plane of partial cross section of the liner. for bottles of figure 1 having a seal at the upper end above the resilient fastener.

Detailed description of the invention Figure 1 shows the face of the inner or inner front wall of a reclosable / resealable bag 100 having a first reclosable, elongated, profiled, continuous fastener half 130. Figure 2 shows the side inner or inner one side of the wall of the bag 108 of a resealable bag 100 and having the second half of a reclosable, elongated, contoured, continuous fastener 132. The faces of the wall 110 and 108 are the opposite faces of the wall when they are joined together to form a plastic bag 100. The faces 108 and 110 can be joined together to form a bag 100 by heat sealing.

The first and second halves of the resilient fastener, elongate 130, have first and second, elongated, continuous profile fillets identified in FIGS. 1 and 2 by reference numerals 136 and 138.

The front wall 110 of the bag and the rear wall 108 of the bag 100 are made of a plastic film which is laminated to at least one layer of nylon. The wall material of the bag of the preferred embodiment is composed of layers of low density polyethylene (LDPE) and nylon that are laminated together as shown in Figure 2A. The profiled fillets 136 and 138, on the other hand, are preferably made of polypropylene, however, an alternative embodiment uses profile fillets 136 and 138 made of polyethylene. The LDPE / nylon combination provides a material for the bag with higher tensile strength than the materials for bags of the prior art, but which is also impermeable to oxygen. The fillets of the polypropylene profile 136 and 138 are attached to the LDPE / nylon film of the bag as shown in Figure 1 using heat sealing or an adhesive in alternative embodiments.

Figure 2A shows three different laminated layers constituting the walls of the bag 109 and 110. Although Figure 2A shows a three-layer laminate, other embodiments include two-layer laminates or laminates of more than three layers. In the preferred mode, outer layers 109 are polyethylene layers with intermediate layers 111 of a nylon layer. The polyethylene and nylon layers are laminated together as shown in the base of Figure 2A. By using at least one layer of nylon, the laminate provides an oxygen-impermeable bag wall that is also much stronger than the walls of the prior art bag which are made only of polyethylene or only of polypropylene. Those skilled in the art will realize that other embodiments may use a bag wall having a layer of nylon that is laminated to different polyethylene plastics. Still other modalities they allow the use of multiple layers of nylon with one or more layers of another plastic.

In the preferred embodiment, the wall material of the bag is a multilayer nylon central barrier film, known as X3-2075, available from ISO Polyfilms, Inc., 101 ISO Par wqay, Gray Court California. A preferred embodiment, the average thickness of the material for the wall of the bag ranges between 2.3 mils and 2.7 mils. By using the ASTM D-882 test method, the final strength of the bag material ranges from 4800 psi for the material of 2.5 mils and 7800 psi for the 2.3 mil material. The preferred embodiment had a water vapor transfer rate (WVTR) of 0.62 grams per 100 square inches of the bag material for 24 hours using the ASTM F-1249 test method. Alternative modes include slightly higher water vapor transfer rates, but also below 0.62 grams / 100 square inches / 24 hours.

An important aspect of the invention is the fact that the first profile thread, elongate, continuous 136 and the second profile thread, elongate, continuous 138 have dimensions that provide a hermetic seal to the water-tight air after the interconnection of these. The air tight and / or watertight seal provides an important portion to protect against foreign material such as bacteria, fungi and viruses so that they do not enter the interior of the bag 100. In addition, this seal will deprive the aerobic or aerobic bacteria of oxygen. other microbes within the contents of the bag, thus limiting or destroying their ability to replicate. Therefore, the risk of lethal contamination of the bed and / or other perishables within the bag 100 is reduced. Those skilled in the art will realize that it is also possible to use other types and configurations of reclosable fasteners known in the art, with the walls of the LDPE bag plus nylon, whether or not it provides an airtight and watertight seal. Also important for the different applications of the invention is that the bag 100 has air-tight and / or watertight side seals 152, 152 at each end of the reclosable fastener, each side seal 150, 152 connects one end of the bag to the other. resilient fastener to an internal surface of a front wall 108 and an inner surface of a rear wall 110 of the liner 100. At each end 132, 134 of the re-closable fastener assembly 130 is a water-tight, air-tight side seal 150, 152. Each side seal 150, 152 connects the end 132, 134 of the removable fastener assembly 130 to an inner surface 124 of the front wall 108 and an inner surface 124 of the rear wall 110 (as seen in figure 3). Any of the seals described herein can be made by different devices including heat sealers, ultrasonic sealers and other devices known in the art. Seals can also be manufactured with a good food grade adhesive.

It should be noted that the tenth edition of the Websters Collegiate dictionary defines "air-tight" to be understood as "impermeable or almost impervious to air". According to the dictionary definition, an "air-tight" seal can be understood as almost impervious to air. However, experts in the manufacture of bags will construct a resealable seal "air tight" as defined by an air leakage test of the industry standard known as ASTM D3078-02. According to this standard, a bag is immersed in water on which a pressure is applied. Seal leaks manifest as bubbles.

When used herein, an "air-tight" seal means a seal that will impede the movement of air at atmospheric pressure and at room temperature., through or along the seal structure for a considerably prolonged time. In other words, an airtight seal must prevent transfers of air modes from inside to outside and vice versa. For example, an "air-tight" seal must be able to keep the air molecules in a bag before the seal closes and the air molecules out of the bag after the seal closes, for as long as the airbag is expected to Product contained within the bag remains reasonably cool.

In addition to the resealable seal being airtight, however, the wall of the nylon-laminated bag will also be substantially impermeable to oxygen, thereby improving the property of the bag to preserve perishables. In particular, nylon, the layer impermeable to oxygen in the wall of the bag will prevent the passage of oxygen required by aerobic organisms to survive and multiply. By interrupting the diffusion of oxygen through the wall of the bag, aerobic organisms They can not multiply after they have consumed any amount of oxygen that may be contained in the bag.

As already mentioned, the li100 has a reclosable faste130. The re-closable fasteassembly 130 has two ends 132, 134. Between the ends 132, 134, a first elongated profile fillet, continuous 136 is locked so that it can be released with a second, elongated, continuous profile fillet 138. It will be noted that the first, elongated, continuous profile 136 and the second, elongated, continuous profile 138 can have any type of male and female elements protrusions that when locked offer an airtight seal and / or watertight.

In a variant of the invention, wherein the bag 100 incorporates a coating for baby bottles, which is also identified by the reference number 100, includes a base in the form of a bellows 101, and an air tight and / or airtight seal. water 103 in the bellows-shaped base 101. The invention also considers the placement of side bellows in the lining 100 (not shown) In a preferred embodiment of the invention, it has been found that a specific type of reclosable faste130 provides a particularly durable water-tight / watertight seal for use in the present invention. The faste130 consists of a first, elongated, continuous profile fillet 136 and a second, elongated, continuous profile fillet 138 each with at least two contiguous hooks 336, 435, 338, 438 on it (as seen in FIG. figure 9). The first, elongated, continuous profile thread 136 has contiguous hooks 336, 436. The second, elongated, continuous profile thread 138 has the adjoining hooks 338, 438 thereon. Although only two pairs of hooks 336, 436, 338 and 438 are constructed and arranged in the profiles 136, 138 in the variant shown, it will be understood that it is possible to use a larger or smaller number of hooks, as desired, with a corresponding increase in the width of the fillets 136, 138.

Preferably, the hooks 336, 436 on the first profile thread, elongate, continuous 136 are next to one another. As an option, the hooks 338, 438 in the second, elongated, continuous profile fillet 138 are also joined together in a variant of the invention. As shown in Figure 9, at least the hook 336 is at one end of the first, elongated, continuous profile flange 136. The second hook 436 is located close to the hook 336.

In a variant of the invention, the first, elongated, continuous profile thread 136 has a plurality of continuous recesses 536, 636, 776 along a length of the thread 136 (FIG. 9). The second, elongated, continuous profile fillet 138 has a plurality of continuous recesses 538, 638, 738 along a length of the fillet 138. Of course, it will be noted that it is possible to create any number of recesses along the fillets 136, 138, such as, but not limited to, more than 3 recesses and less than 3 recesses, with corresponding increase / decrease in corresponding hooks and other elements. In a variant of the invention, at least one of the recesses has the dimension to be releasably coupled with one of the hooks. As shown in Fig. 9, the recesses 536 and 636 substantially coincide with the hooks 338, 438 so that when the hooks 338, 438 are locked so that they can be released in the recesses 536, 636, an airtight secure seal is formed. to water and / or air-tight. In the same way, the recesses 638 and 738 coincide considerably with the hooks 336, 436 so that when the hooks 336, 436 are locked so that they can be released in the recesses 638, 738 a water tight and / or airtight seal is formed. It will be noted that although the geometry and arrangement of the various recesses and hooks described herein in general refers to a hook and a recess that is substantially coincident to the hook, a variety of suitable geometries or configurations of the male elements and the female elements are describe only with the condition that the seal formed when the profiles are locked is air tight and / or watertight. Furthermore, it will be noted that the present invention proposes a resilient fastener with a plurality of air-tight and / or water-tight seals between the corresponding elements of the profile threads 136, 138.

Furthermore, it will be noted that, preferably, at least two continuous recesses 536, 636 have the dimension to coincide so that they can be sealed with the hooks 338, 438 and / or at least two continuous recesses 638, 738 have the dimension to be coupled in a resealable manner with the hooks 336, 436.

In another variant of the invention, at least one continuous recess in each fillet of the continuous profile does not have the dimension to be coupled with a respective hook, but has the dimension to fit hermetically in a recess that substantially coincides with a profiled element. It will be noted that when the element 126 is inserted into the recess 538, the tight fit between the element 126 and the recess 538 also creates another adjustment substantially watertight and / or airtight. The interaction between the other recesses and elements causes a similar result with the combination of the interaction of the different hooks, recesses and elements, creating a fail-safe seal, considerably hermetic. Of course, it will also be appreciated that although the geometry of the elements is like that shown in Figures 8 and 9, it is possible to use any type of geometry or configuration, for example a rectangular geometry, a triangular geometry, and so on. The profile of the present invention proposes at least one projection along a length of each fillet of profile 136, 138 with the dimension to fit securely in one of the continuous recesses in each fillet of profile 136, 138 that does not have the dimension to fit with the hooks.

As further seen in Figure 9, a plurality of flanges 106, 107, 140, 142, 144, 146 is located on the rear sides 154, 156 of each profile thread 136, 138. The shoulders 106, 107, 140, 142, 144, 146 provide a convenient way to obtain an airtight and / or watertight seal of the back sides 154, 156 to the inner surface 124 of the body of the liner 102 in the front wall 108 and the back wall 110.

As shown in Figure 9, at least one of the hooks 338, 438 on the first, elongated, continuous profile fillet 138 is located near the central axis C of the profile fin 138. In this variant of the invention, one or more hooks 338, 438 are distributed in a substantially symmetrical manner on two sides of the central axis C of the profile fillet 138. By having the different hooks, recesses and elements constructed and / or ordered as described herein a seal is obtained air tight and / or watertight.

As an option, the bottle liner 100 may also contain the infant formula or other nutritional supplement or beverage within the body of the liner 102 (Figure 5). In this case. The stamp The air-tight and / or water-tight seal formed with the reclosable fastener 130 is specifically useful since the contents are hermetically sealed within the coating body 102 until it is ready for use. The upper end seal 158 can also, as an option, be added above the reclosable fastener 130 to reduce the risk of contamination of the contents of the coating body 102.

It will be noted that the liner 100 of the present invention is used with the bottle 200 and is located within a cavity 202 in it (Figure 6). In addition to using it with bottle 200, the present invention provides equipment 550 for feeding infants which is composed of a plurality of bottle liners 100 (FIG. 7). Each bottle liner 100 can be dispensed from a roll of bottle liners 100 that are interconnected so that they can be separated by a frangible connection between each respective liner 100, such as through perforations 100A or other suitable means. Otherwise, the equipment 100 may also be composed of individual liners 100 that are packaged within a box or other suitable container (not shown) so that a nursing mother can easily access the liners 100 when the need arises. In another variant, each individual liner 100 or a plurality of liners 100 may be sealed within a non-resealable plastic bag (not shown) that can be opened by tearing when the need arises. The equipment 550 also contains the formula, nutritional drinks, threaded nozzles for baby bottles, one or more 200 bottles of different sizes and / or coatings 100 of different sizes, with the size, ordering and construction with the 550 equipment for easy access and use with the respective bottles 200.

Still another variant of the invention provides the coating 100 which is constructed of a food-grade nylon and LDPE, for use in microwaves that allows the contents of the coating 100 to be placed in a microwave oven to reheat the contents to a temperature adequate It will be noted that this feature of the invention allows to solve some of the most common problems associated with the feeding of newborns, for example, the reuse and reheating of the mother's milk or the formula for infants. It will be noted that the plastic is chosen to eliminate or minimize any leaching that may occur.

As an option, the coating 100 contains an additive that is extruded with the coating 100. The additive changes color when the temperature of the coating content increases or changes to a preset color when the content of the coating 100 is at a suitable temperature. As an option, the liner 100 may also have a temperature indicator or indicator of the temperature range associated with the liner 100, e.g., connected thereto or placed as a strip on or in the liner 100, which changes color when the temperature of the coating content increases or reaches a desired, pre-established temperature or temperature range. This characteristic solves the common problem of offering the infant formula or breast milk at an appropriate temperature that is neither too hot nor too cold for the child. This feature of the invention allows to visually determine the temperature of the contents of the coating 100 before feeding the infant.

Although the embodiment of the invention shown in Figure 9 exemplifies a reclosable fastener 130, i.e., an elastic zipper without side sealing flanges, it will also be noted that the reclosable fastener 130 also has a fastener with flanges which can be closed again 131 as shown in Figure 8. The re-closable tab holder 131 of Figure 8 contains at least two considerably flat tabs 133, 135, each of which bears two or more hooks contiguous that can be locked, resealed. The flanges 133, 135 are sealed to the front wall 108 and / or the rear wall 110 of the bottle liner 100 with air-tight and / or water-tight tab seals 137, 139. By arranging the tabs 133, 135 the problems associated with sealing an irregularly shaped surface, eg a rack profile, to a smooth surface are eliminated. The flange 133 and the flange 135 provide a flat, uniform, almost smooth surface to which the inner surface 124 and the walls 108, 110 of the covering 102 are sealed. To improve the appearance and air and water tightness of the coating 100 , it is preferred that the length L of the fastener assembly that can return to closing 130 is less than the width W of the rear wall 110 (Figure 1).

In a variant of the invention, the liner 100 has a frangible access 155 (Figure 5). Access 155 can take multiple forms such as a fold line, a record line or a plurality of perforations. Preferably, the access 155 is substantially parallel to the assembly of the reclosable fastener 130, or the access 155 may be sinusoidal in shape for aesthetic purposes.

Access separation 155 exposes the releasable fastener assembly 130 and provides access to the reclosable fastener 130. A feature of the invention is that the frangible access 155 is located on the front wall 108 and on the rear wall 110 of the body of the liner 102 adjacent to the assembly of the reclosable fastener 130 and above the seal at the upper end 158 (Figure 5).

In a preferred embodiment, the frangible access 155 consists of a plurality of perforations 157.

As already mentioned, the film from which the body of the liner 102 is constructed is preferably made of low density polyethylene (LDPE) and nylon, wherein the nylon layer limits the diffusion of oxygen through the wall of the bag. The film is folded and sealed to form the bellows of the base 101 in a customary manner. As an option, the side bellows (not shown) are also added to the body of the liner 102. It will be noted that the bellows forming characteristic increases the overall carrying capacity of the liner 100 and causes the bottle 200 with the liner 100 to be generally more stable when the whole bottle is filled with formula and the like.

The seals used in the present invention can be manufactured using the usual sealing techniques, which include for example heat sealing, ultrasonic sealing, adhesive sealing, etc. To assist in the formation of the airtight and / or watertight seals used in the present invention, it will be noted that the length L of the reclosable fastener 130 is less than the length of the front wall 108 and / or the rear wall 110 forming the body of the liner 102.

As seen in Figure 10, the side seals 150, 152 are placed on each end of the reclosable fastener assembly 130. The side seals 150, 152 offer an air tight and / or watertight seal between the seals. internal surface 124 of the film 112 and the re-closable fastener assembly 130. Each of the side seals 150, 152 connects one end 132, 134 of the reclosable fastener 130 to the inner surfaces 124, 124 ' of the rectangular sheet of the film into the edges of the liner 114, 116 of the body of the liner 102 thus preventing air or liquids from entering or exiting the lining through the ends 132, 134 of the bra assembly that can return to be closed 130. Preferably, before sealing the resilient fastener 130 to the front wall 108 and / or to the rear wall 110, the ends 132, 134 of the reclosable fastener 130 they are molded by compression. Compression molding of the ends of the reclosable fastener 132, 134 creates considerably flattened ends 162, 164, which facilitates the formation of air tight and / or watertight seals of the invention. It will be noted that these side seals they considerably reduce the risk of contamination of the body contents of the bag liner 102.

It will be noted that the assembly of the reclosable fastener 130 can take many forms. Preferably, the fillets of the profile 136, 138 are each made of a single flexible, extruded polymeric material. In addition, tear tabs 172, 174 can be added to the anterior walls 108, 110 to assist in placing the liner 100 in the bottle 200.

Proper feeding, positioning and sealing of the reclosable fastener 130 at predetermined locations on the material from which the casing body 102 is manufactured are important aspects of the invention. The machines that are available commercially from Z-Patch, Inc., of Carbondale, Illinois, are reliable and can perform repeatedly the steps mentioned in the method described above with high performance and low cycle times.

While only some preferred embodiments of the invention have been described in the foregoing, those skilled in the art will appreciate that the embodiment may modify or alter without departing from the spirit and scope of the invention. Thus, the preferred embodiment described above should be considered in all respects as exemplary and not restrictive, so that the scope of the invention is indicated by the appended claims and not by the foregoing description, and all changes that fall within the meaning and scope of the equivalences of the clauses are proposed to be included in the present.

Claims (28)

1. A resealable bag consisting of: the opposite wall faces, each side of the wall is composed of at least one layer of nylon laminated with at least one plastic layer and has internal surfaces, internal surfaces they have a top part; a re-closable fastener attached to the upper portions of the inner surfaces, the reclosable fastener has: a first profile fillet, elongated, continuous with first and second adjacent hooks placed thereon; a second profile file, elongated, continuous with first and second • adjacent hooks placed on it; and a plurality of continuous recesses located along the length of the first and second fillets of the profile, at least one of the recesses has the dimension to be coupled in a manner sealable with one of the first or second hooks in the opposite fillet and has the size, is constructed and arranged so that when the profile fillets are locked, they enclose a bag practically impermeable to oxygen.

2. The reclosable bag of claim 1, characterized in that the faces of the wall are composed of laminated polyethylene and nylon layers.

3. The resealable bag of claim 1, characterized in that the faces of the wall are composed of layers of a multilayer, nylon core film.

4. The reclosable bag of claim 1, characterized in that the elongated profile fillets are composed of at least polypropylene or polyethylene, or both.

5. The reclosable bag of claim 1, characterized in that the first and second profile fillets, elongated, are practically without side sealing tabs.

6. The reclosable bag of claim 5, characterized in that at least two of the continuous recesses have the dimension to be coupled so that it can be sealed with the hooks, and at least one continuous recess in each of the first and second ones. second fillets of the profile has the dimension not to be coupled with the hooks.

7. The reclosable bag of claim 6 further comprises at least one projection along a length of the first and second fillets of the profile and has the dimension to fit securely in the continuous recess of the first and second fillets of the profile without the dimension to be coupled with the hooks.

8. The reclosable bag of claim 1 further comprises a plurality of ridges on a rear side of the first and second fillets of the profile.

9. The re-closable fastener of claim 8, characterized in that at least one of the hooks on the first profile fillet is located near the center of the profile fillet.

10. The reclosable bag of claim 9, characterized in that the hooks are distributed in a substantially symmetrical shape on two sides of a central axis of the profile thread.

11. The reclosable bag of claim 10, characterized in that the hooks are grooves of a single hook of equivalent height.

12. The reclosable bag of claim 1, characterized in that the opposite faces are made of low density polyethylene (LDPE) and nylon with a tensile strength between about 4800 psi and 7800 psi.

13. The resealable bag of claim 1, characterized in that the counter face made of low density polyethylene (LDPE) and nylon has a water vapor transfer rate less than or equal to about 0.62 grams / 100 square inches / 24 hours.

14. A plastic film bag consisting of: opposite faces, each side is made of a plastic laminate and a nylon, each face has an internal surface and a first, second, third and fourth edge, wherein the opposite faces are joined together along the first, second and third edges, and a resilient fastener is attached to the edges. internal surfaces around the fourth edge of the faces and approximately parallel to the fourth edge of the faces, the resilient fastener consists of: a first profile thread, elongate, continuous with first and second adjoining hooks placed thereon; The first hook is located at one end of the profile fillet and the second hook is located next to the first hook; and a second profile thread, elongated, continuous with first and second adjacent hooks located therein, the first hook is located at one end of the profile thread and the second hook is located next to the first hook; Y a plurality of continuous recesses located along the length of the first and second fillets of the profile, at least one of the recesses has the dimension to be sealably coupled with the first or second hooks in the opposite fillet and has the dimension, construction and arrangement to form an airtight and watertight seal so that the wall of the bag is practically impermeable to oxygen.

15. The reclosable bag of claim 14, characterized in that the faces are composed of laminated polyethylene and nylon.

16. The resealable bag of claim 14, characterized in that the faces are composed of a multilayer nylon core film.

17. The reclosable bag of claim 14, characterized in that the elongated profile fillets are composed of at least polypropylene or polyethylene, or both.

18. The re-closable fastener of claim 14, characterized in that the first and second elongated profile fillets are practically without side sealing flanges.

19. The plastic film bag of claim 14, characterized in that at least two of the continuous recesses in the re-closable fastener have the dimensions to engage with the hooks in resealable manner.

20. The plastic film bag of claim 14, characterized in that the reclosable fastener further comprises at least one projection along a length of each of the first and second fillet of the profile and with the dimension to be fixed securely in the continuous recess in each of the first and second fillet of the profile that does not have the dimension to be coupled with the hooks.

21. The plastic film bag of claim 14, characterized in that the reclosable fastener further comprises a plurality of flanges on a rear side of each of the first and second fillets of the profile.

22. The plastic film bag of claim 14, characterized in that at least one of the continuous recesses in each of the first and second fillet of the profile has the dimension to not be coupled with the hooks.

23. The plastic film bag of claim 14, characterized in that at least one of the hooks in the first profile thread is located close to the fillet profile center.

24. The plastic film bag of claim 19, characterized in that the hooks are distributed in a substantially symmetrical shape on two sides of a central axis of the profile thread.

25. The plastic film bag of claim 19, characterized in that the hooks are grooves of a single hook of equivalent height.

26. The resilient fastener of claim 14, characterized in that the first and second elongated profile fillets are practically without lateral sealing flanges.

27. The plastic film bag of claim 14, characterized in that the faces of the counter walls made of low density polyethylene (LDPE) and nylon each have a tensile strength of between about 4800 psi and 7800 psi.

28. The plastic film bag of claim 13, characterized in that the faces of the counter walls made of laminated layers of low density polyethylene (LDPE) and nylon have a water vapor transfer rate less than or equal to about 0.62 grams / 100. square inches / 24 h.