JPH10152163A - Both-direction air permeable liner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a both-direction air permeable liner capable of passing air even under any sealed part to which torque is applied and capable of being also utilized as an air impermeable liner at the same time. SOLUTION: A cap liner 10 for both-direction air permeability contains a bottom part layer 13 composed of a fluid impermeable and air permeable substance and a top part layer 15 composed of a polyethylene substance extruded to be subjected to cast molding and the top part layer 15 has openings 12 communicating with the bottom part layer 13 and the channels 11 provided to the surface of the upper part of the top part layer 15 and a substance of the laminated bottom part layer 13 has air permeability and, therefore, the liner permits air to flow in both directions. The gas generated within a container is passed from the interior of the container to the atmosphere through the opening parts between the spiral screw thread of a cap sealing part and the screw thread of a container neck to certainly escape and a substance is not passed through the liner from the interior of the container to the outside of the sealing part and the container and air permeation in a reverse direction is performed to achieve equilibrium against proportionally rising external pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap liner, and more particularly, to a two-layer liner capable of ventilating a gas-permeable seal in both directions. The present invention, in particular,
To close and seal the opening, put the seal cap on
Suitable for use as a bottle cap liner that can be tightened against something like a cooperating bottle or container.

[0002]

BACKGROUND OF THE INVENTION Liners for seal caps have been commonly used in the past. Seal caps are used on things like bottles or other containers that have an opening and can be tightened against the bottle or container to close the opening. Liners are relatively well known and are mainly used for container finish land
Designed to maintain a seal between the lip and the surface of the liner over it, the liner is located between the seal cap and the container. A fluid impervious seal at the finish land of the container is highly desirable to prevent permeation and leakage of fluid from the container into or out of the container. These terms relate to the passage of fluid through the gap between the barrier and the object, such as a cap liner and a bottle or other container.

[0003] The main problem is that the container packages the product that evolves gas or under extremely high pressures under certain conditions, such as elevated temperatures and / or changes in atmospheric pressure. Sometimes happens. The seal should retain the associated liquid in the container, while being semi-permeable to gas, and should withstand excessive internal pressure to vent with the atmosphere. Thus, damage to the seal or the container is prevented by the release of excessive internal pressure.

Previous conventional cap liners have included single or multi-layer liners composed of materials such as corrugated fibrous boards, paperboards, plastics, and foils to prevent fluid permeation. Coatings on one or both large surfaces may also be included. While such designs are relatively inexpensive and are effective in preventing the permeation or leakage of fluids from bottles or containers, some liquids that release gas or that change with external atmospheric pressure, Pressure balance cannot be maintained.

[0005] To solve the above problems, breathable liners have been used.

A major problem with conventional breathable liners is that they cannot be ventilated consistently at specific pressures or within a limited range of pressures inside and outside the associated container. The inability to reverse vent only a portion of the gas in the container so that the pressure can be balanced with respect to the relatively elevated external pressure is also a problem with conventional breathable liners. Have been.

The cap liner is made of a synthetic material such as a thermoplastic. U.S. Patent No. 4,
No. 121,728, entitled "breathable liner", has a first ply (layer) of an impermeable plastic and a second ply (layer) of a compressible and deformable foam material. One such cap is shown. Both plies are extruded simultaneously and laminated together to form a cap liner. The first ply of the cap liner is used for a bottle or container so that the cap is fastened to the container. The second ply of the cap liner is compressed between the bottle and the cap, causing the first ply to contact and seal the bottle or container.

Another example of a breathable structure for relieving excessive pressure formed in a container is disclosed in US Pat. No. 2,424,424.
No. 801, which is a type of breathable structure, in which the glass product neck allows gas to escape after the gas evolved reaches the position of lifting the liner from the glass product neck. Are disclosed.

US Pat. No. 3,114,467 has a specific structure that allows the liner to rise away from the neck of the glass article under the effect of the formation of gas pressure, and then allow gas to escape. Other types of seal-breathable bottle caps are disclosed. These structures have the disadvantageous deficiency of allowing gas to escape while also allowing liquid to permeate. Both U.S. Pat. Nos. 2,424,801 and 3,114,467 provide the possibility of pressure equilibration, that is, the provision of a reverse gas flow to equilibrate the pressure in the container to atmospheric pressure, or Can not expect.

US Pat. No. 3,448,882 has a fibrous, semi-permeable, polytetrafluoroethylene skin which is gas permeable but thereby not wet and which prevents the passage of liquid from within the container. It relates to a liner comprising a pulpboard backing.

In many cases, various structures and liners are available for sealing bottles or containers, all of which suffer from major drawbacks. Even if the structure allows gas to escape, it is equally unsuitable for preventing liquid from escaping. In some cases, the escaping liquid may damage material in one or more portions of the liner structure.

Although cap liners such as US Pat. Nos. 4,121,728 and 4,789,074 are more effective at reducing fluid permeation or leakage than cardboard or pulp board cap liners. Such cap liners inherently require relatively expensive materials and manufacturing techniques. For example, the fourth
The second ply of 121,728 is provided with an incomplete but similar ply of deformable material, but between the sealing lip of the bottle and the cap.
Only a relatively narrow portion of the second ply is actually compressed. The remainder of the second ply is not required to physically reinforce the first ply, so that minor components in the second ply are wasted in cost.

US Pat. No. 4,789,074 discloses a first, substantially fluid impermeable film, a second, compressible, resilient, "perforated", first film. A cap liner comprising a reinforced web bonded to a bottle, wherein the cap liner resiliently compresses the perforated web between the bottle and the cap when the cap seal is tightened against the bottle to bring the film into contact. Must be sealed. In the invention of US Pat. No. 4,789,074, the perforated web acts like a spring that presses against the film or glue and engages and seals the top of the bottle finish. For this reason, 4,789,0
The web of the '74 patent resiliently pushes against the film or affix, and during the sealing process of the seal due to the torque provided by the interaction of the threaded bottle cap and the top of the threaded bottle. They must be brought into contact and sealed by the necessarily applied compressive force.

US Pat. No. 3,071,276 utilizes a porous paper backing and US Pat.
No. 89,074 (Han) comprises a first film substantially impermeable to fluid, and a second compressible resilient, porous, reinforced web bonded to the first film. Utilizing a cap liner, where the cap seal is tightened against the bottle, the cap liner compresses the perforated web between the bottle and the cap, making the film resiliently contact and prevent sealing. must not.

The above-mentioned US Pat. No. 4,121,72
No. 8 has a groove, but has some differences from the present invention. No. 4,121,728 seal liner has no exhaust passing through the bottom of the inner or lower panel, to the top of the second ply of the seal, and then to the sides of the seal. In US Pat. No. 4,121,728, the inner panel of the seal liner and the sides of the seal are lifted by deforming the lower ply to form a ventilation channel and then to the sides of the seal. The pressure of the gas generated inside the sealed container is such that the sealing means is deformed or retracted so as to exhaust the gas. This type of exhaust causes fluid leakage when the package is tilted. U.S. Pat. Nos. 3,071,276 (pellets) or 3,44, each utilizing a pulp board or porous paper board backing with a microporous plastic skin.
As disclosed in US Pat. No. 8,882, the use of a porous backing is a seal backing for sealing a seal for chemical compatibility with actives such as hypozincate. Not available. These liners are also ineffective at drawing gas into the interior of the container and balancing with external pressure build-up.

In the references of US Pat. Nos. 4,121,728 or 3,045,854 (Patton), each includes a groove or channel extending across the side surface of the disk to the side. Perforated, but semi-permeable, so that gas can pass through it into the channel on the upper surface of the laminated disk, where gas is exhausted through the sides of the seal No sexual backing has been incorporated.

[0017]

SUMMARY OF THE INVENTION In view of the foregoing, it is a primary object of the present invention to provide a novel air vent that can be ventilated under any torqueed seal and at the same time be utilized for a non-breathable liner. The object of the present invention is to eliminate the drawbacks previously pointed out by providing a breathable liner.

The main object of the present invention is to define an at least two piles of material which may or may not be able to deform when a compressive force is applied, It is an object of the present invention to provide a novel two-way breathable liner for sealing, comprising a disc-shaped member provided with grooves or channels on the surface to which a compressive force is applied but not compressed. The gas emanating from the closed container is vented to the atmosphere where the gas passes directly under the seal to the upper surface of the top layer and along the relevant channel to the interior of the seal. By a mechanism that escapes to the atmosphere through an opening between the helical thread of the seal and the thread of the container neck, which in turn forms a continuous channel for the escape of gas. The opposite mechanism, when the pressure inside the container is lower than the outside atmospheric pressure, allowing air to enter the continuous channel between the cap threads and the container neck below, to balance the pressure. There is also.

[0019]

SUMMARY OF THE INVENTION The present invention is directed to a two-layer liner for a breathable seal. The liner, under certain conditions (increased temperature or reduced atmospheric pressure) and under pressures that can be extremely increased, vent the internal pressure from the connected containers containing the substances that generate the relevant gases. make it easier. Conversely, a liner of the present invention used with a cap seal facilitates pressure equilibration associated with decreasing internal pressure, or increasing temperature, or increasing atmospheric pressure. When in place, the liner of the present invention prevents the outflow of liquid.

The two-layer liner is substantially round and disc-shaped,
Laminated, fluid impermeable, gas permeable patch material, ie, bottom layer, and resilient (extruded,
(Cast cast polyethylene) backing, ie consisting of a top layer. The backing has an opening communicating with the back of the front or bottom layer and also with a groove or channel provided on the upper surface of the backing. This improved two-layer liner construction for a gas-permeable, breathable seal is to be applied to the container without the passage of liquid from inside the container through the liner to the seal and outside the container. By passing gas from the inside through the bottom layer to the side surface of the sealing portion and venting to the outside atmosphere, the gas generated inside the connected container can be reliably released.

In a preferred configuration, the bottom layer is composed of a material that is permeable to the reverse flow of external air from atmospheric conditions to the container. While venting from the interior of the sealed container to the outside atmosphere, the preferred two-layer liner of the present invention provides for the internal pressure and the outside atmosphere to be controlled by the reverse semi-permeable flow of pressure into the interior of the container. And balance. The container has a vapor space (filled with liquid or other substance and the vapor space above it), above which the external temperature decreases or the external pressure increases. , "Paneling" or partial depressions in the container wall. This situation is
When the container falls from high to low, or when the sealed container is exposed to low temperatures,
This also occurs when the interior of the sealed container is partially evacuated. Thus, reverse flow of air, or bidirectional ventilation, reduces this problem. The two-layer liner achieves an equilibrium between internal and external pressure without removing the cap and liner. Thus, while equilibrating the reduced pressure in the container, impurities cannot enter the interior of the container from outside. The novel seal liner of the present invention prevents liquids or solids from exiting the container when the container is accidentally tilted or turned over.

The above and other objects will become apparent hereinafter, and the features of the present invention will be more clearly understood from the detailed description, the appended claims and the accompanying drawings. Would.

[0023]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, there is shown a bottle or container-like object 23 having a conventional thread 21 and a neck 2.
0 and bottle or container 23 through this neck
Includes an opening into the interior of the housing. Cap 1
Provided as a seal for the opening 22, the thread 21 on the neck of the bottle or container engages the cooperating thread 3 on the cap, as is known in the prior art. 23 can be tightened. Other alternative means of closure can be used to close the cap and bottle, such as the snap closure in FIG.

A cap liner 10 is mounted within the cap 1 and is provided for sealing between the cap 1 and the opening 22 of the bottle or container. In particular, seal around the area where the container opening contacts the lip. The configuration of the cap liner 10 is shown in detail in FIG. The configuration of the cap liner comprises a substantially disc-shaped bottom or first layer 13 and a top or second layer 15.
including. The bottom layer is the first and second large surface 1 respectively.
6, 17 comprising a substantially fluid impermeable and breathable material. The cap liner also includes a top layer or second laminate 15 of an elastic material bonded to the first layer at a second major surface. The bottom layer is composed of a breathable, flexible material that is chemically inert with respect to the contents of the container, remains substantially impermeable to fluids, and effectively protects the container. Seal. Suitable materials for forming the first or bottom layer 13 are breathable, non-woven or spunbond olefins such as polyethylene, which are fluid impermeable but breathable. For this reason, any semi-impermeable or semi-permeable material can be used for the bottom layer.

The top layer 15 corresponds to the opposite bottom layer 13 and is disk-shaped with the same size and includes at least one channel extending across the surface. Preferably, the top layer 15 extends laterally along the diameter of the disc and has a plurality of channels 11 intersecting the periphery across the surface. The channeled surface of the top layer optionally includes spaced openings 12 through which at least one open opening 12 communicates with at least one open channel groove. ing. Preferably, the plurality of openings 12 intersect at least one channel. Alternatively, if the channel is carved deeply so as to expose the first layer of semi-permeable material, spaced openings are not required in the channel grooves. For a 40 mil resilient material used for a typical top layer, the depth of the channel is between about 0.01-40 mils, preferably 10-30 mils, more preferably 1-30 mils.
5-20 mils. Channels 11 with apertures 12 spaced in the channel grooves are spaced and formed so as not to reduce the strength of the material in the top layer. For this reason, the openings 12 can be arranged in a fixed pattern so as to maximize the cooperation with the channels 11, and the at least one opening 12 is randomly arranged so as to be arranged in at least one channel. You can also. Proper thickness and surface area create a composite bilayer liner with the same overall density and strength as a conventional cap liner. The material constituting the second layer has a limited compressive and elasticity, especially in a direction perpendicular to the first and second large surfaces. In many applications, the second layer is fluid impermeable but substantially thinner than the first layer, which is a breathable material. It is important that at least one opening is left open between the openings so that gas can enter and exit therefrom.

In its most general form, the second layer includes one or more transverse grooves or channels with openings or openings of any size and size spaced apart, and Or an opening through it,
It is arranged to cooperate with a groove or channel. In a preferred configuration, the cap liner of the present invention includes a second layer having a plurality of parallel grooves with spaced openings or openings therethrough, leading to the first surface 16 of the bottom layer 13. Including. The formation of the opening 12 can be provided in various ways. In the simplest case, these openings are
An opening 12 which typically has straight sides, e.g., about 0.020-0.035 inch in diameter, and is formed in the top layer 15 by mechanical means for drilling or laser means for forming holes in the material. Can be formed. The formation of the openings in the top layer takes place before the layering of the top and bottom layers.

The present invention relates to a two-way permeable seal, wherein the seal comprises a liner of an elastic material, a top layer comprising a variety of materials, including woven, nonwoven and films having microporous semi-permeable properties. 15 and the bottom layer 13. Materials used for the bottom layer include, but are not limited to, polyolefins, polyesters, polytetrafluoroethylene and other polymeric materials. Examples of non-woven, processed materials include carding, air lay, needle punch, spunlace, spunbond, meltblown and various finishing means, including traditional napping, suede, tigering, and brushing.
By "elastic" material is meant a material that has the ability to partially or completely recover its original shape after the force that has distorted its shape has been removed. Natural rubber and styrene
Butadiene, polychloroprene, nitrile rubber, butyl rubber, polysulfide rubber, cis 1,4-polyisoprene, ethylene-propylene terpolymer, silicone rubber and polyurethane rubber, thermoplastic polyolefin rubber, and elastomers such as styrene-butadiene-styrene Are materials that can be used for the construction of the bottom layer.

In a preferred embodiment of the present invention, the formation of the two-layer liner breathable seal of the present invention comprises extruding and cast polyolefin such as polyethylene and a bottom layer 13 of a woven spunbond material. Utilizing a top layer 15 comprising a top layer 15, a preferred lamination process is used when the molten adhesive 14 is applied between the bottom and top layers. The melt adhesive preferably has the property of hardening immediately. Cold adhesive can be used,
Not preferred. More preferably, the adhesive is applied to the top polyethylene layer 15 in a measured amount so as to avoid openings in the top layer or openings to the channels.
For example, the application of the adhesive can be conveniently performed by using a print wheel with a selected or random pattern to orient and score points. Alternatively, the adhesive may be applied to the first surface 16 of the bottom layer 13 of a woven spunbond material.
The above can also be applied. The application of the laminating glue is performed by opening the top layer 15 with the openings 12 located in the channels
Must be avoided. This is because the openings penetrate here and communicate with the bottom layer.

In FIG. 2, the top layer 15 as shown is easily and inexpensively formed. The top layer 15
Thus, the spaced apertures 12 are made up of a plurality of parallel spaced channels that penetrate the top layer and are arranged to cooperate with the bottom layer 13. The openings do not extend through the bottom layer 13. Parallel channels are selected to facilitate process parameters. In this way, the top layer 1 has a compressive and elastic force limited in a direction perpendicular to the first surface 18 and the second surface 19.
5, a light, strong, channeled layer is created. Various shapes and shapes of channeling are available,
At least one provided channel extends around the circumference of the disk, and the provided cooperating opening is provided with a bond adhesive 1
Not blocked by 4. Even though some of the cooperating openings 12 are closed, a sufficient number of openings provided are left open to allow ventilation inside and outside the container. Although the channels are illustrated as extending across the entire surface of the disk in a parallel relationship to each other, for the purposes of the present invention, as shown in FIGS. The channels need not be parallel as long as they extend around the liner.

As further shown in the related figures,
The neck 20 of a conventional container, such as a bottle or other container 23, has the usual threads 21 shown in FIG. 1 and has an upper annular sealing surface 24 along the top. The screw cap 1 has a top or end panel 6 and a downwardly directed skirt 7 with integral threads.
Having. The cap is tightened on the neck by the cooperative relationship of the threads 3 and 21 and heads downward in the usual way of applying a torque, and is connected to the cap by a sealing means as is known to those skilled in the art. Compress the deformable liner between. Instead of using an integral threaded cap and bottleneck or jar of the same finish or a similar container, a "snap-type" cap as shown in Figures 6 and 7 can be used and the corresponding container・ The neck is an annular set collar
(collar).

In operation, the insertion of the two-layer liner cap is cut into a disk shape, approximately the size of the interior region of the seal, so as to fit closely with the seal. The liner comprises at least one groove or channel, at least one of which has a second large surface 1 of the top layer 15 of the disc.
It extends across 8 and intersects the periphery, parallel to the diameter. Preferably, the liner has a plurality of spaced grooves or channels 11 extending across the second major surface 18 of the top layer of the disc and parallel to the diameter. The grooves or channels 11 preferably traverse the surface of the disk at equally spaced intervals. However, it may be a random pattern on the top layer. The raised areas between the channels or grooves are brought into contact with the inner surface of the cap as torque is applied to the cap and the cap moves down onto the surface of the liner. Similarly, if a snap-type cap is used, the interior of the cap 1 will be in the area between the channels on the second major surface of the second layer of the disc liner when the cap is snapped into place. Contact. The area between the channels or grooves is slightly distorted when the seal is tightly closed and the container opening is sealed at the first large surface of the first layer against any leakage of fluid. The channel or groove is left open to the end of the cap, where it regulates the ingress and egress of gas to equalize the pressure between the interior of the container and atmospheric pressure. The grooves act as channeling. The bottom layer of the two-layer liner is pressed into the annular opening 24 of the container, forming a fluid-impermeable seal there.

The liner 10 is preferably located inside the cap 1. When the cap is removed during use,
A small amount of adhesive 4 can be used to help keep the liner in place with respect to the end panels. The internal glue 4 is not required, but using a small amount of glue 4 applied to the end panel below the cap 2 is preferred to keep the liner inside the cap 1 and the breathable opening is Be careful not to close.

The internal gas passes through a gas permeable lower layer in contact with at least one opening 12 on the first large surface of the channel of the second layer, and a liner through at least one channel. By passing along the periphery of 10, it is discharged to the outside atmosphere through the spiral thread. Conversely, as the pressure inside the container decreases,
External air enters the container through the spiral groove, into the channel of the second layer, into the opening of the channel, through the opening of the channel, through the semipermeable first layer. As shown in FIG. 6, in the example of a snap-type seal, the opening or slit 32 is in an annular set collar through which gas escapes to or is taken from the atmosphere.

In a further operation, the container cap seal 1 is arranged in such a way that the threads 21 on the inner surface of the skirt going under the cap seal cooperate with the mating threads 3. Or fastened tightly to the container. As shown in FIG. 4, the cap seal is securely fastened to the container by cooperating threads 3 and 21 and usually requires a minimum amount of cap tightening to ensure an effective seal against fluid leakage. Torque is applied. Next, a slight loosening torque within a certain range is applied to loosen or remove the cap from the opening of the bottle or container. Opening 2 of container 23
Tightening with the desired applied torque presses the bottom layer 13 so as to seal the layer against the circumference of the two. further,
The lower layer is intensively pressed against the first layer by the bottle cap to seal the peripheral lip of the bottle or container. First large surface 1 of top layer 15
8 is squeezed against the end panel inside the bottle cap 2 with slight compression and strain forces. The channels and corresponding selectively spaced apertures remain functional for that purpose. Thereby, the bottle or container is simultaneously sealed against liquid permeation through the bottom layer of the cap liner 10 and leakage between the cap liner 10 and the bottle. However, because the two-layer liner is gas permeable through the bottom layer, fluid leakage due to the compression of the bottom layer 13 against the lip of the bottle or container is effectively sealed and the gas vented from the bottle or container 23 is sealed. Can pass through the bottom layer 13. The cap liner 10 effectively seals the leak with the cap, but due to the breathability of the bottom layer,
The vented gas passes through the bottom layer, through the opening 12 extending through the top layer 15 of the channel 11, and from there to the interior of the cap. Due to the presence of the channel 11, the gas is directed around the interior of the cap and is released to the surrounding atmosphere. In the situation where the pressure decreases as described above, there is a reverse flow to equalize the pressure.

One of the principles which differ from the prior art is that when the cap liner is stopped in a suitable position relative to the container, the skin material of the bottom layer having the first surface 13 adjacent to the container opening is usually It is not a conventional non-breathable sheet material used as a skin. It is preferred to use woven, non-woven, spunbonded polyolefin as the skin material. An example of a spunbond polyolefin that is available for use is the material sold by DuPont Company, Inc. under the trade name "Tyvek". Tyvek consists of randomly arranged continuous filament fibers spun from a woven fabric and heat sealed together to form a web. Other components, such as those described above, can be used provided they have the properties of a semi-permeable membrane, that is, gas-permeable or fluid-impermeable. Because of this, the material used in the bottom layer is breathable, allowing the gas formed in the container during storage or transport to pass through the bottom layer and opening the top layer in connection with the channel. To the atmosphere, and then through the threads of the container neck and the interior of the cap seal to the atmosphere. A typical bottom layer thickness is
It is about 0.004-0.005 inches.

The skin material, ie the first or bottom layer of the laminate, consists of a membrane that is permeable to gas but not fluid under normal operating conditions. Thus, the epidermal material acts as a semi-permeable membrane. However, some materials tend to wet the backing material somewhat when used with bleach or other corrosive fluids. As a result, these corrosive fluids corrode and alter conventional backing materials. As a result, instead of using a conventional pulpboard liner material or the like, in order to use a limited compressible material, an extruded and cast polyolefin, preferably polyethylene, is used to form the channel grooves and openings therethrough. It is preferred to use a second layer that has both. Other types of materials can be used as the first layer as long as they have fluid impermeable and breathable properties.

With this arrangement of a two-layer liner for a breathable seal as described herein, the internal or external pressure easily vents or the pressure difference between the container and the atmosphere is easily equalized and bleached. The internal pressure of the bottle containing the bleach is created, but a semi-permeable first layer prevents the bleach from leaking past the epidermis when the bleach bottle is not upright, which is bleaching. The agent may corrode the liner material or travel past the liner and drip onto the outer surface of the bottle, corroding the bottle label, the packaging case carrying the bottle, or the shelf supporting the bottle in the store. Testing has shown that this is the case. Store clerks and consumers who handle bottles are also protected from contact with the bleach material in the bottle.

FIG. 2 shows a liner groove or channel 11 for obtaining a sealable and breathable two-layer backing cap liner. Grooves or channels
Top layer 15 whose side is adjacent to top 2 of the sealing cap
Formed on the surface of the cap liner and extends across the center of the disk. In other words, the seal shown here represents a basic embodiment of the invention. First, in a flat top layer 15 with a groove or channel 11 having an opening 12, the raised area between the groove or channel contacts the side surface adjacent to the lower portion of the seal or cap 2. . Second, the flat lower surface of the first layer allows gas to escape through the breathable layer while forming a fluid impermeable seal on the container. And thirdly, the ventilation or gas escapes through the threads of the neck seal.

While the preceding description has shown a preferred and practical form of the invention, the structure shown is broadly novel and
Modifications may be made within the scope of equivalents without departing from the spirit and scope of the present invention, which is to be construed as an extension of the claims.

[Brief description of the drawings]

FIG. 1 shows an annular container top constructed according to the invention,
It is an exploded view of a cooperating cap and a cap liner.

FIG. 2 is an enlarged view showing details of a top portion of the cap liner of FIG. 1;

FIG. 3 is a cross-sectional view of the cap liner of FIG. 2 taken along plane 3-3.

FIG. 4 is a cross-sectional view of the cap and cap liner in an enlarged cross-sectional view of the closure container neck and liner, with the closure tightened in place relative to the container neck finish. The liner at the time is illustrated.

FIG. 5 is an enlarged cut-away view similar to FIG. 4, illustrating the manner in which ventilation occurs when the cap seal is in place on the container neck finish, of the present invention. Figure 2 illustrates a sex disc.

FIG. 6 is an exploded view of a container, cooperating cap and cap liner constructed in accordance with the present invention, wherein the cap is a snap seal.

FIG. 7 with snap seal in place.
Figure 5 is an enlarged cross-sectional view of a location similar to Figure 5 illustrating how ventilation occurs when the seal is securely snapped over the container neck finish.

FIG. 8 is an enlarged detail view of a cap liner having another channel pattern according to the present invention.

FIG. 9 is an enlarged view of a cap liner having yet another channel pattern according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cap 4 ... Internal adhesive 6 ... Top or end panel 7 ... Skirt 10 ... Cap liner 11 ... Channel 12 ... Opening 13 ... Bottom layer 14 ... Adhesive 15 ... Top layer 18 ... First surface 20 ... Second Surface 21 ... thread 22 ... opening 23 ... bottle or container 24 ... annular sealing surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor G. Edward Campbell 535 Eastman Lane, Petaluma, California, USA

Claims (12)

[Claims] 1. A bi-directional breathable cap liner, comprising:
(A) consisting of a substantially fluid impermeable and breathable material;
A substantially disc-shaped bottom layer having (b) a first and a second surface on both sides, said first surface being provided when the cap liner is tightened into place in the container. Said bottom layer adjacent to the container opening, and (c) an elastic material having first and second surfaces on both sides,
A top layer substantially disc-shaped, wherein the second surface of the bottom layer includes a top layer laminated on the first surface of the top layer; The second surface of the top layer has at least one channel, the channel extends across the surface and extends therethrough through the channel on the second surface of the top layer and the channel of the bottom layer. A bi-directional breathable cap liner, having spaced openings communicating with said second surface. 2. The cap liner of claim 1, wherein a channel on the second surface of the top layer intersects a periphery of the top layer. 3. The cap liner according to claim 1, wherein at least one of said openings is open in communication with said channel. 4. The cap liner according to claim 1, wherein said second surface of said top layer has a plurality of radial channels on said surface. 5. A bi-directionally permeable cap liner for sealing comprising a substantially disc-shaped member defined by at least two layers, comprising: (a) a substantially fluid impermeable, , A polyolefin, a breathable material, the bottom layer comprising: (b) first and second surfaces on both sides, said first surface when the cap liner is tightened into place in the container. Is a bottom layer adjacent to the container opening; and (c) a top layer of an elastic material having first and second surfaces on both sides, wherein the second surface of the bottom layer is the top layer. A top layer that is laminated to the first surface of the first layer, wherein (d) the second surface of the top layer has at least one channel, the channels extending across the surface. Piercing therethrough on the second surface of the top layer Interval which communicates with the second surface of Yaneru and said bottom layer has an opening that has been drilled,
Where bi-directional breathable cap liner. 6. The breathable cap liner of claim 5, wherein said bottom layer comprises a fibrous spunbond material and said top layer comprises an extruded and cast polyolefin. Breathable cap liner. 7. The breathable cap liner of claim 5, wherein said bottom layer is comprised of fibrous polyethylene and said top layer is comprised of extruded and cast polyethylene. Cap liner. 8. The breathable cap liner according to claim 5, wherein said bottom layer is comprised of polytetrafluoroethylene and said top layer is comprised of an elastic material. 9. A container body including an opening having a peripheral sealing lip, a cap sealing portion including an end panel and a downward skirt, and between the opening and the end panel of the cap sealing portion. A combination of a container and a sealing portion, wherein the skirt removably fastens the cap sealing portion to the container body, wherein: A substantially disc-shaped bottom layer of a fluid-impermeable, air-permeable material having (b) a first and a second surface on both sides, said first surface comprising: A bottom layer adjacent the container opening when the cap liner is in the clamped position relative to the container; and (c) a polyolefin having first and second surfaces on both sides, the polyolefin being substantially circular. A plate-shaped top layer, When torque is applied to the closed container opening to prevent body leakage, there is a slight deformation and the second surface of the bottom layer is laminated on top of the first surface of the top layer. (D) said second surface of said top layer has at least one channel, said channels extending across said surface and penetrating therethrough. Having a spaced opening communicating with the channel on the second surface of the second layer and the second surface of the bottom layer, wherein at least one of the cap seals is tightened against the opening. Combination of container and seal where one channel remains open to the end of the cap seal. 10. The combination of claim 9 wherein said bi-directionally breathable liner bottom layer comprises a fibrous, non-woven, spunbonded olefin and said top layer comprises: Combination of container and seal, consisting of extruded and cast polyolefin. 11. A combination of a container and a seal according to claim 9, wherein the second surface of the top layer of the liner includes a plurality of channels traversing the surface and intersecting the periphery. The combination of the container and the sealing part. 12. The combination of claim 9 wherein said downwardly directed skirt has a threaded inner surface and said threaded container opening when tightened thereto. Cooperating with the top layer, the channel on the second surface is formed to communicate with the threaded downward skirt to define a passage to the atmosphere. Combination of container and seal.