MXPA96005292A - Lining with bidirection ventilation - Google Patents

Abstract

The present invention relates to a cover liner with bidirectional ventilation consisting of: a) a substantially disc-shaped bottom layer of a material substantially impermeable to fluids and porous to gases b) said bottom layer has surfaces opposite first and second, further characterized in that said first surface is adjacent to an opening of a container when the lid liner is secured in place to a container: c) a substantially disk-shaped top layer of elastomeric material having opposite surfaces first and second, said second surface of said bottom layer is laminated to said first surface of said upper layer, and d) said second surface of said upper layer has at least one channel therein, which extends through said surface and which has openings spaced along the same in communication with said channel in the second surface of the upper layer and in communication ion with said second surface of said fon layer

Description

LINING WITH BIDIRECTIONAL VENTILATION FIELD OF Lfi INVENTION This invention relates to covers for lids and more particularly to a double-layer liner that has bidirectional ventilation capacity for a ventilated closure. This invention is particularly suitable for use with a bottle cap liner wherein a sealing cap is insurable in a cooperating bottle or similar container for closing and sealing the opening.

BACKGROUND OF THE INVENTION Seal liner covers have commonly been in the past, where the sealing cap is used in a bottle or similar container having an opening, and said cap is insurable in the bottle or container to close the opening. The liners are relatively well known and are essentially designed to maintain a seal between the end edge of the container and the surface of the liner covering thereon, wherein said liner is placed between the eyeliner lid and the container. A fluid impervious seal at the end edge of the container is highly desirable to prevent permeation or spillage of fluids from the container into or out of said container. These terms refer to the passage through the space between a barrier and an object such as the lid lining and the bottle or other container.A major problem is created when the container is packed with a product that releases a gas. or it is under pressure, because said pressure may increase excessively under certain conditions, such as a high temperature and / or a change in atmospheric pressure It is desirable that the seal be semipermeable to gas and allow excessive internal pressure to be vented to the gas. At the same time, retaining the associated liquid inside the container, in this way, the rupture of the closed or the container is discarded with the release of excessive internal pressure.The previous conventional liner covers have included one-piece or multi-layer liners, constructed of corrugated fiberboard or cardboard materials, paperboard, plastic, aluminum foil or the like, and may also include a coating on one or both major surfaces that is resistant to fluid loss. Such designs, while relatively inexpensive and effective in preventing the permeate or spillage of fluids from the bottle or container, do not allow a balance in the pressure caused by liquids emitting gas, or changes in external environmental pressure. To face the above problems, ventilated linings have been used. A major problem with conventional ventilated linings is their inability to vent < 5"insistently at a particular pressure or a limited scale of internal and external pressures within the associated container." It is also considered as a problem of conventional ventilated linings, s? Inability to reversibly vent only the gas portion, while a balanced pressure. it can be maintained inside the container, with respect to the relatively increased external pressure.The lids of lids have been constructed of synthetic materials such as thermoplastics.The patent of EUfl. 4,121,726, entitled "Ventilated linings", shows a type of lining for a lid having a first fold made of a waterproof plastic and a second fold constructed of a foam material which is compressibly deformable Both folds are simultaneously extruded and laminated together to form the cover liner The first fold of the liner of the lid It is applied to the bottle or container while the lid is secured to the The second fold is compressed between the bottle and the lid and pushes the first fold towards a sealing contact with the bottle or container. Other examples of ventilated structures for releasing excessive pressure accumulated in a container include U.S. Patent No. 2,424,801, which describes a type of ventilated structure, wherein the neck of the glass article is provided with a special configuration, which will allow the gas to escape after the accumulation of gas has reached a point where it will lift the liner out of the neck of the glass • box. U.S. Patent No. 3,114,467 describes another type of bottle cap with ventilation seal, wherein the bottle cap is provided with a special structure that allows the liner to rise under the action of pressure buildup. of gas, allowing the lifting of the lining out of the neck of the glass article that escapes the gas.These structures have the disadvantageous deficiency, while allowing the gas to escape, which are also equally adequate to allow the liquid to escape. the '801 or the' 467 foresee or contemplate the possibility of a pressure equalization, that is, to reverse the flow of gas to balance the pressure in the container with the pre Atmospheric The patent of E.U.A. No. 3,448,882 refers to a liner composed of a pulp board reinforcement with a fibrous and semipermeable polytetrafluoroethylene coating, which allows the passage of gases but is not wetted by, and prevents the passage of liquid from inside the container. In many instances, while various structures and liners for sealing bottles or containers are available, they all suffer from major deficiencies. While the structures will allow the gas to escape, not all are equally adequate to prevent the liquid from escaping. In some cases, the leaking liquid can damage the material of one or more portions of the lining structure. Although lid liners such as those of U.S. Patents. No. 4,121,728 and 4,789,074 are more effective than pulp or cardboard paperboard liners against permeate or fluid spillage, such liners inherently require relatively expensive materials and manufacturing techniques. For example, the second fold in the '728 patent provides an imperfect and coextensive layer of a deformable material, even though only a relatively small portion of the second fold is actually compressed between the sealing edge of the bottle and the lid. It is not required that the rest of the second fold mechanically reinforce the first fold, therefore the non-essential material in the second fold represents an unnecessary expense. The patent of E.U.A. No. 4,789,074 discloses a lid liner consisting of a substantially impermeable fluid-proof film, a second compressible elastic reinforcement membrane "fora inosa", linked to the first film, so that when the closure of the lid is secured in the bottle, This compresses the foraminous membrane between the bottle and the lid, elastically pushing the film towards a sealing contact with it. In the invention of '074, the foraminous membrane acts as a spring to force the film, or front, towards a sealing coupling with the upper part of the end of the bottle. Therefore, the membrane of the '074 patent must spring elastically to the film or boundary, towards a sealing contact by means of a compressive force necessarily exerted thereon during the closing procedure with sealing by the torque provided by the interaction of bottle cap screwed with the top of the bottle screwed. The patent of E.U.A. No. 3,071,276 uses a porous paper reinforcement, while the US patent. No. 4,789,074 (Han) uses a cover liner of a first substantially fluid impermeable film and a second compressible elastic foraminous reinforcing membrane linked to the first film, wherein the closure of the cover is secured in the bottle, in addition to which must compress the foraminous membrane between the bottle and the lid, elastically pushing the film towards the sealing contact. This reference, the Patent of E.U.A. No. 4,121,728 described above, while having grooves therein, appears to have many variations with the present invention. The sealing lining on the '728 does not appear to release gas through and into the bottom of the interior or bottom panel, towards the top of the second fold of the closed and subsequently to the sides of the closed. In '728, the inner sealing liner panel and the sides of the closed, are designed to deform and retract the sealing means by the pressure of gases accumulated in the sealed container, so that when these give towards the lower fold, this rise, forming a channel * fa ventilation, then releasing the gas from the sides of the closed. This type of gas release can result in fluid spillage if the gasket is tilted. The use of a porous reinforcement, such as the one described in the patent of E.U.A. No. 3,071,276 (Pellet) or 3,448, B82 each of which uses a porous cardboard or pulp board reinforcement with a microporous plastic coating, are unacceptable as a seal reinforcement for sealing closures, due to chemical compatibility with materials aggressive as the hypochlorite. In addition, these liners are not effective in allowing gas within the container to equilibrate with external pressure increases. With reference to the Patent of E.U.A. No. 4,121,728 and 3,045,854 (Patton), although each of them contains grooves or channels that extend laterally along the lateral surface of the disc, these do not incorporate a porous reinforcement that is semipermeable and that allows gases to be ventilated at through it to a groove that exists in the upper surface of the laminated disc, while allowing gases to be released through the sides of the closed. In view of the foregoing, it is a principal objective of the present invention to eliminate the aforementioned disadvantages by providing a novel ventilated liner which ventilates under any applied closed torque, at the same time being able to use a non-ventilated liner. The main objective of this invention is to provide a new bi-directional ventilation loop for enclosures, which includes a disc-shaped member defined by at least two folds or layers of a material, which may or may not be deformable when be subject to compressive force, and where grooves or channels are provided on the upper surface of the upper layer, which although subject to a compressive force, are not compressed. The release of gases accumulated in the closed container to the atmosphere is by means of a mechanism in which the gases are passed directly to the upper surface of the upper layer, behind the closed, the gases travel along the associated channels towards the interior of the closed, and then escape into the atmosphere through openings that exist between the coiled spirals of the closed and the screwed in the neck of the container, which in effect forms a continuous channel for the escape of gas. An inverse mechanism is contemplated for the pressure equilibrium when the pressure in the vessel is less than the external ambient atmospheric pressure with the air inlet in the continuous channel between the coils of the lid and the neck of the vessel below.

BRIEF DESCRIPTION OF THE INVENTION This invention is directed to a double liner for a ventilated closure. The liner facilitates ventilation of the internal pressure of a related container containing a material, which develops an associated gas under pressure, which could increase excessively under certain conditions (such as high temperatures or decreases in atmospheric pressure). In reverse fashion, the liner of this invention, used with a lid closure, facilitates the equilibrium of the pressure associated with a decrease in internal pressure, or increase in temperature, or increase in atmospheric pressure. the liner of this invention prevents the flow of liquid.The double liner consists of a substantially round, disc-shaped, laminated, fluid-impermeable, gas-porous, material front or backing layer, and having a reinforcement or top layer elastomeric (extruded and cast polyethylene) The reinforcement is provided with openings that communicate towards the back of the front or bottom layer, and which is also munica with grooves or channels provided in the upper surface of the reinforcement. The structure of this improved double liner for a ventilated enclosure allows the gases, which have accumulated inside the related container, escape in a safe manner by venting the interior of the container through the bottom layer to the sides from the closed and outward, to the external environmental atmosphere, without the passage of liquid from the interior of the container through the liner towards the closed and towards the outside of the container. In this preferred form, the bottom layer is constructed of a permeable material to reverse the external air flow of ambient atmospheric conditions within the container. While providing ventilation from the interior of the sealed container to the external ambient atmosphere, the preferred dual liner of this invention provides the equilibrium of the internal pressure with the external ambient atmospheric pressure, by means of the reversible semipermeable flow of the pressure towards the interior of the container. The containers, which are filled with liquid or other material and have a space for steam above them, are susceptible to "paneling" or partial collapse of the container wall where the external temperature drops, or the external pressure increases . This situation will also occur when a container is brought from a higher height to a lower one, or when a sealed container is subjected to a colder temperature, then causing a partial vacuum in the sealed container. Therefore, reverse or bidirectional airflow ventilation will reduce this problem. By means of the present double lining, the equalization of the internal pressure and the external pressure is achieved without removing the lid and liner. In this way, during the equalization of a reduced pressure in the container, impurities coming from the outside inside the container can not penetrate. The novel closure liner of this invention prevents the escape of liquids or solids from the container under accidental tilting or tilting of the container.

In view of the foregoing and other objects which will become apparent hereinafter, the nature of the invention will be more clearly understood with reference to the following detailed description, the subject matter appended and various views illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded view of the upper part of an annular container, a cooperating lid and a lid liner constructed in accordance with the invention. Figure 2 is a detailed enlarged top view of the lid liner of Figure 1. Figure 3 is a cross-sectional view along the plane 3-3 of the lid liner of Figure 2. Figure 4 is a cross-sectional view of the lid, lid lining, cross-sectional view in elongated format turned through a closed neck of a container and lining, to illustrate the liner in place with the lock secured to a neck finish of a container. Fig. 5 is an elongated fragmentary view similar to Fig. 4, and illustrates a double-walled ventilated disc of this invention, showing the manner in which ventilation occurs when the lid closure is placed in a neck finish; a container. Figure 6 is an exploded view of a container, lid and lid liner, constructed in accordance with the present invention further characterized in that the lid is of tight closure. Figure 7 is an elongated fragmentary sectional view similar to Figures 4 and 5, with a snap closure in place, and illustrating the manner in which ventilation occurs when the closure is securely tightened over the finish neck of a container. Figure 8 is an elongated detailed view of a lid liner in accordance with this invention, with an alternative channel pattern. Figure 9 is an enlarged view of a lid liner with this invention, with yet another channel pattern.

DESCRIPTION OF THE PREFERRED MODALITY Referring now to the drawings, figure .1 shows a similar bottle or container 23, said bottle or container having the usual coiled coils 21, includes neck 20 and an opening communicating through said neck towards the inside of the bottle. the bottle or container 23. The lid 1 is provided for the closing of the opening 22 and is insurable in the bottle 23 by means of the threads 21 in the neck 20 of the bottle or container, engaging cooperating threads 3 in the lid, as it is known in the prior art. Other alternative means for closing can be used to secure the - - and the bottle, such as the tightening closure of figure 6. The cover liner 10 is provided for mounting on the lid 1 and sealing between the lid 1 the opening 22 of the bottle or container. Specifically, said seal is circumferentially around the opening of the container and against the final edge. The construction of the lid liner 10 is shown in detail in Figure 3. The structure of the lid liner includes a substantially disc-shaped bottom or first layer 13 and an upper or second layer 15. Said bottom cover is constructed of a material substantially porous to gas and impervious to fluids, having opposite principal surfaces first and second 16 and 17, respectively. The cap liner also includes a top or second laminated layer 15, of an elastomeric material bonded to said first layer to the second major surface thereof. The bottom layer is constructed of a flexible material having gas permeability, and which is chemically inert to the alleged contents of the container, and maintains a substantial fluid impermeability to effectively seal the container. The preferred material for the construction of the first layer or bottom layer 13, is a porous material to the gas of a non-woven or spin-bonded definition, such as polyethylene, which is impermeable to fluids, but permeable to gas. Therefore, any semi-porous or semi-permeable material can be used for the bottom layer.

The upper layer 15 is disc-shaped to correspond and to be coextensive with the lining layer 13, and said upper layer-includes at least one channel extending along the surface thereof. Preferably, the top layer 15 has a plurality of channels 11 extending transversely along the diameter of the disk and across the surface intersecting the circumference. The grooved surface of the top layer optionally contains openings 12 spaced apart therethrough so that at least one open opening 12 is in communication with at least one open channel groove. Preferably, a plurality of openings 12 will intersect at least one channel. Alternatively, with deeply grooved surfaces where the channel exposes the first layer of semipermeable material, openings not spaced apart may be required in the -channel slot. In the typical elastomeric material of 1.02 microns used for the upper layer, the depth of the channel can be in the range of between .254 microns to 1.02 microns, preferably between almost 254 microns to 762 microns, and most preferably between almost 381 microns. 508 microns. The channels 11 with openings spaced apart 12 in the channel grooves are spaced apart and configured so that they do not reduce the strength of the upper layer material. Therefore, the openings 12 can be placed in a definitive pattern to maximize cooperation with the annals 11, or the openings can be made in a random pattern, so that at least one opening 12 is placed in at least one a channel. The proper thickness and surface area produces a composite double-layer liner, with a density and total strength equivalent to that of conventional liner covers. The construction material of the second layer has a limited compression or elasticity ability, particularly in the direction perpendicular to the first and second major surfaces thereof. In many applications, the second layer will be substantially thinner than the first layer of gas porous material and impervious to fluids. It is important that between the openings, at least one opening is kept open to transport the gases under its entry or exit in it. In its broadest form, the second layer includes one or more transverse grooves or open or open channels spaced in any size, shape or arrangement of said open or open apertures extending therethrough and cooperating with the grooves and openings. channels. In its preferred form, the cap liner of this invention includes a second layer having a plurality of parallel open or open slots spaced therethrough and towards the first surface 16 of the bottom layer 13. The formation of the openings 12 can be provided in several ways. In the simplest instance, these openings are open 12 which usually have straight sides, that is, with diameters of almost! Ci8 up to 889 mm, and can be formed in the upper layer 15 by using mechanical means to perforate or by means of laser, to form perforations in the material.

The formation of the openings in the upper layer is carried out before the lamination of the upper and bottom layers. This invention relates to a closure with bidirectional ventilation, wherein the closure uses a lining of elastomeric material, such as the top layer 15, and a bottom layer 13 of various materials, including woven and nonwoven materials and films having semipermeable microporous characteristics. Materials that can be used for the bottom layer include, but are not limited to, polyolefins, polyesters, polytetrafluoroethylenes, and other polymeric materials. Examples of non-woven processed materials are carding, air laying, needle puncture, lace spinning, spinning, blowing under melting and various traditional finishing means, including hooked, agamuzado, brindle and brushed fabric. By "elastomeric" material is meant a material having the ability to recover essentially its original form partially or completely after a deforming force has been removed. Natural rubber elastomers, such as styrenebutadiene, polychloroprene, nitrile rubber, butyl rubber, polysulfite rubber, cis-l, 4-polyisoprene, ethylenepropylene terpolymers, silicone rubber and polyurethane rubber, thermoplastic polyolefin rubbers, and Stretch-butadienestireno, í- acceptable materials for the construction of the bottom layer. In the preferred embodiment of this invention, the formation of a double-liner ventilation closure of this invention, using a bottom layer 13 of a fibrous spunbonded material and an upper layer 15 of molten and extruded polyolefin, with the polyethylene, the preferred rolling process is used when a hot melt adhesive 14 is applied between the bottom layer and the top layer. A hot melt adhesive is preferred for its fast vulcanizing properties. Cold adhesives can be used, but not preferred. In addition, the adhesive is preferably applied in moderate amounts to the upper layer of polyethylene 15, and in a pattern which avoids the open coater openings or channels of the upper layer. For example, the adhesive application can be conveniently carried out with a print wheel with a selected pattern or a random pattern, by a dotted application oriented on a site and the like. Alternatively, the adhesive can be applied to the first surface 16 of the bottom layer 13 of spin-bonded fibrous material. The application of the laminating adhesive must avoid the openings 12 in the upper layer 15, where the openings are placed in the grooves of the channels 11; wherein said openings pass through to communicate with the bottom layer.

In Figure 2, the top layer 15, as illustrated, is formed easily and inexpensively. The upper layer 15 formed in this manner, consists of a plurality of spaced apart parallel channels wherein the spaced-apart openings 12 have been placed along the upper layer to cooperate with the bottom layer 13. Said openings do not extend through the openings. of the background layer 13. The parallel channels are selected to facilitate the parameters of the procedure. Therefore, a strong, lightweight grooved layer is produced in the upper layer 15 which has limited compression ability and limited elasticity in the direction perpendicular to the first and second surfaces 18 and 19, respectively. The grooving of various shapes and sizes can be used, as long as at least one channel extends towards the circumference of the disc and the cooperating apertures provided are not blocked by the bonding adhesive 14. A bolting of the cooperating apertures can be accepted. 12, as long as a sufficient number of openings are kept open to move the gas in or out of the container. The channels are illustrated being in a parallel relationship with each other, extending along the entire surface of the disc, but in accordance with this invention, the channels need not be parallel, as long as the portions of said channels extend towards the perimeter of the disc-shaped liner, as illustrated. Figures 8 and 9 »r With a more specific reference to the drawings, the neck 20 of a conventional receptacle, such as a bottle or other container 23, is provided with usual threads 21 indicated in Figure 1 and with an upper annular sealing surface 24 along the top of it. The screw cap 1 has a top panel or end 6 and a dependent edge with continuous threads 3. The cover is secured to the neck 20 in a cooperative relationship between the threads 3 and 21 and in such a way that the cover can be carried down in the usual manner, applying a torque thereto to compress a deformable liner between the cap as the sealing means, as is understood in the art. It will also be understood that instead of using a continuous type of cap and bottleneck or similar jar or container that has a similar finish, a "snap" lid can be employed, such as that shown in FIGS. and 7, and the neck of the corresponding container with an annular-retension collar kit. In operation, the insert of the double liner lid is cut into the shape of a disc about the size of the internal area of the enclosure to provide a fair closing. The liner is provided with at least one groove or channel with a minimum of one extending laterally along the second major surface 18 of the upper layer 15 of the disc, to intersect the circumference, and parallel to the diameter thereof. Preferably, the liner is provided with a Jurality of spaced grooves or channels 11 extending laterally through the second major surface 18 of the upper layer of the disc, and parallel to the diameter thereof. The slots or channels 11 are preferably equally spaced across the face of the disc; however, a random pattern in the upper layer is acceptable. The raised area between the channels and grooves will have contact with the inner surface of the lid while the lid is brought down on the lining surface by applying a torque to the lid. Similarly, if a snap-like lid is used, when the lid is tightened in place, the interior of the lid 1 will contact the area between the channels and the second main surface of the second layer of the disc liner. The areas between the channels or grooves will be slightly deformed when the closed is tightened, thus sealing the opening of the container against any spillage of fluid with the first-major surface of the first layer. The channels or slots are kept open at the edge of the lid, at which point the grooves act as grooves to accommodate the ingress or egress of gases and equalize the pressure between the interior of the container and the atmospheric pressure. The bottom layer of the double liner is forced against the annular opening 24 of the container and forms a seal impervious to liquids therein. The liner 10 is preferably placed inside the lid 1. To help hold the liner in place on the end panel when the lid is removed during use, a small amount of adhesive 4 can be used. Although the internal adhesive 4 is not necessary, it is preferred to use a small amount of an adhesive 4 applied to the end panel under the layer 2 to hold the liner in place in the layer 1, being careful not to close the ventilation openings with the adhesive. The inner gas will penetrate through the lower gas-permeable layer, contacting at least one opening 12 in the first main surface in the channels of the second layer, subsequently following at least one channel towards the circumference of the liner 10, the gases are forced out through the coiled spiral into the outer atmosphere. Conversely, with the decrease in pressure in the container, outside air will enter through the spiral grooves within the channels of the second layer within the openings in said channels, and through these in the container, through The first semipermeable layer.

Referring to Figure 6, in accordance with the closed click type, an opening or slot 32 is left in the collar-annular kit to allow gases to escape or gases to enter and pass through it coming from, or towards the atmosphere. In a further operation, the lid of the container lid 1 is secured to the bottle or the container by means of screwing 3 in co-operating coupling threads 21 on the inner surface of the closed edge of the lid pending. As shown in Figure 4, a lid closure is secured to a container by means of cooperating coils 3 and 21, a minimum touch is usually applied to secure the lid to achieve effective sealing against the spillage of liquids. Subsequently, a limited release troque within a specific scale is applied to the layer to loosen it or remove it from the opening of the bottle or container. Tightening with a desired application torque presses the bottom layer 13 as a sealing layer against the circumference of the opening 22 of the container 23. In addition, the bottom layer is concentrically pushed by the bottle cap against the first layer to seal the circumferential edge of the bottle or container. The first main surface 18 of said top layer 15 is pushed against the inner end panel of the bottle cap 2 with limited compression and deformation. The channels and openings spaced apart optional corresponding thereto, remain functional. Therefore, the bottle or container is simultaneously sealed against any liquid permeation through the bottom layer of the lid liner 10, and against spillage between the lid liner 10 towards the bottle. However, since the double liner is permeable to gas through the bottom layer, the ventilated gases from the bottle or container 23 are able to penetrate the bottom layer 13 while the liquid is effectively sealed against the spill by compression. of the bottom layer 13 against the "rde of the bottle or container." Although the lid liner 10 effectively seals against the spill to the lid, due to the permeability of the bottom layer gas, the vented gases escape through the bottom layer. the bottom layer, through the openings 12, extending through the upper cover 15 and in the channels 11 thereof, into the cover.With the presence of the channels 11, the gas is directed towards the circumference inside the lid and passes into the ambient atmosphere.A reverse step is followed to balance the pressure in a situation of reduced pressure described hereinabove.A major difference over the prior art is that the The coating surface of the bottom layer having its first surface 13 adjacent to the container opening when the cover liner is secured in place to the container, is not a conventional non-porous laminate material normally used as a coating. It is preferred to use a polyolefin bonded by non-woven and fibrous spinning as the coating material. An example of a spin-linked polyolefin available for use is a material sold under the trade name "Tyvek" by DuPont Company, Inc. The Tyvek is a composite material of randomly arranged filament fibers, which are textile fibers spun and heat sealed together to form a membrane. Other construction materials such as those described hereinabove may be used, as long as they possess the property of a semipermeable membrane, i.e., gas permeability or fluid impermeability. Therefore, the material used for the bottom layer is permeable to gas, so that gases, which are formed in the container during storage or transfer, can penetrate the bottom layer and be vented to the atmosphere through the related openings in the upper layer towards the same channels, and later inside the atmosphere through the ones screwed in the neck of the container and the ones screwed inside the closed lid. Typically, the thickness of the bottom layer is from 0.12 rnm to 0.13 rnrn. The coating material, first layer or bottom layer of the laminate, is formed by a membrane, which has the ability under normal operating conditions, to allow the passage of gas, but to prevent the passage of liquids. In this way, it functions as a semipermeable membrane. However, it has been found that some material, when used with bleach or with any potentially corrosive liquid, has a tendency to allow some fermentation of the reinforcing material. Therefore, these potentially corrosive liquids attack the conventional reinforcement material causing its deterioration. Accordingly, instead of using conventional pulp board liner materials and the like, and to use a limited compressive material, it is preferred to use a second layer of molten and melted polyolefin *, preferably polyethylene, having both channel grooves and openings communicants in it.

Other types of materials can also be used for the first layer, as long as they have the property of fluid impermeability and gas permeability. Tests have shown that with this arrangement of double linings for ventilated enclosures as described herein, the internal or external pressure is easily vented or the pressure differences between the container and the atmosphere are balanced, as well as the accumulation of pressures. internal inside bottles that contain bleach, but the first semipermeable layer prevents the bleach from spilling and passing the coating when the bleach bottle is not up, and this prevents the bleach from attacking the lining materials or being followed and passed to the liner to drip to the outside surface of the bottle and attack the label on the bottle, the packing case that leads to the bottle, or the shelf that supports the bottle in the store. Store employees and consumers are also protected from contact with the bleach material in the bottle. Figure 2 shows channels or grooves 11 in the liner to obtain a double-liner cap of ventilated and sealed, the grooves or channels are formed in the lid lining surface, the adjacent side of the upper layer 15, the closed top of the lid 2 and extend laterally through the central portion of the disk. In other words, the present invention shows the basic embodiments of the invention First, a smooth top layer 15 with grooves or channels 11 having openings 12 therein, wherein the raised areas between the grooves or channels make contact with each other. with the adjacent side of the lower portion of the cap or cap 2, second, a smooth lower side of a first cap, which forms a sealed seal impervious to fluids in the container, while allowing the gases to escape through the cap. gas permeable layer and thirdly, the escape or venting of the gas through the coiled spirals of the neck seal The above specification has exposed the invention in its preferred practical form, but it will be understood that the structure shown is capable of modifications within a scale of equivalence, without departing from the spirit and scope of the invention, which must be understood as widely novel and commensurate with the appended claims.

Claims (12)

NOVELTY OF THE INVENTION CLAIMS

1. - A cover liner with bidirectional ventilation consisting of: a) a substantially disc-shaped bottom layer of a material substantially impervious to fluids and porous to gases; b) said bottom layer has first and second opposed surfaces, further characterized in that said first surface is adjacent to an opening of a container when the lid liner is secured in place to a container; c) a top-substantially disc-shaped layer of elastomeric material having opposite first and second surfaces, said second surface of said bottom layer being laminated to said first surface of said top layer; and d) said second surface of said upper layer has at least one channel therein, extending through said surface and having openings spaced along the length in communication with said channel in the second surface of the layer superior and in communication with said second surface of said bottom layer.

2. The cap liner according to claim 1, further characterized in that said channels of the second surface of said upper layer intersect the circumference of said upper layer.

3. - The lid liner according to claim 1, further characterized in that at least one of said openings is in open communication with a channel.

4. The cap liner according to claim 1, further characterized in that said second surface of said upper layer has a plurality of radial channels on the surface thereof.

5. A t-liner with bidirectional ventilation for a closed one consisting of a substantially disc-shaped member, further characterized in that said disc-shaped member is defined by at least two layers; a) a base layer of substantially fluid-impermeable polyolefin and a gas-porous material; b) said bottom layer has opposite first and second surfaces, wherein said first surface is adjacent to the opening of the container when the lid liner is secured in place to a container; c) a top layer of elastomeric material having a first and second opposed surface; said second surface of said bottom layer is laminated to said first surface of said top layer; and d) said second surface of said upper layer has at least one channel therein, extending through said surface and having openings spaced apart therein, in communication with the channels in the second surface of the upper layer and in communication with said second surface of said bottom layer.

6. ~ The ventilated lid liner according to claim 5, further characterized in that said bottom layer is made of a spunbond fibrous material, and said top layer is molten and extruded polyolefin.

7. The cover cap with ventilation according to claim 5, further characterized in that said bottom layer is made of fibrous polyethylene and said top layer is made of extruded and melted polyethylene.

8. The cap cover with ventilation according to claim 5, further characterized in that said bottom layer is made of polytetrafluoroethylene, and said top layer is made of elastomeric material.

9. A combined container and closed, which consist of a container body that includes an opening with a circumferential sealing edge, a lid closure that includes an end panel and a dependent edge having means to removably secure said lid closure to said container body in close relation to said opening, a bidirectionally ventilated liner interposed between said opening and said end panel of said lid closure, consisting of: a) a substantially disc-shaped bottom layer of porous material or substantially porous to the gas and permeable to the fluid; b) said bottom layer has opposite first and second surfaces wherein said first surface is adjacent to an opening of a container, when the lid liner is secured in place to a container; c) a substantially disc-shaped upper layer of oleophilic material, having opposite first and second surfaces with limited deformation when a torque is applied to close the container opening against fluid spillage; said second surface of said bottom layer is laminated to said first surface of said top layer; and d) said second surface of said upper layer having at least one channel therein extending through said surface V having openings spaced apart therethrough, in communication with the channels of the second surface of the top layer-, and in communication with said second surface of said bottom layer and at least one channel that is kept open toward the edge of said lid closure, wherein the lid closure is secured to the opening.

10. The container and closure combination according to claim 9, further characterized in that said liner bottom layer with bi-directional ventilation is made of non-woven spunbonded fibrous olefin, and said top layer is extruded and melted polyolefin.

11. The container and liner combination according to claim 9, further characterized in that said second lining surface of said upper layer has a plurality of channels extending through said surface and intersecting with the circumference.

12. The combination of container and closed of information with claim 9, further characterized in that said dependent edge has a curled inner surface arranged to be defined, in cooperation with a screwed container opening when secured therein, a gas passage of said channels in said second surface of said upper layer, and in communication with the dependent edge screwed into the ambient atmosphere.