Patent Grant
8602259
The present invention relates to one-way valves and apparatus and methods using one-way valves, and more particularly, to one-way valves defining valve seats and flexible valve covers overlying the valve seats, and to dispensers and packaging incorporating such valves and methods of using such valves.
Aseptic packaging is widely used to prolong the shelf life of food and drink products. With conventional aseptic packaging, the product is filled and sealed in the package under sterile or bacteria-free conditions. In order to maximize shelf life prior to opening, the product and the packaging material may be sterilized prior to filling, and the filling of the product in the packaging is performed under conditions that prevent re-contamination of the product. One such prior art dispenser system that employs an aseptically filled package is shown in U.S. Pat. No. 6,024,242. The package includes a pouch that holds the food or beverage, and a flexible, open-ended tube connected to the pouch for dispensing the product therethrough. A pinch valve is used in the dispenser to pinch the open end of the tube and thereby close the tube from the ambient atmosphere. In order to dispense product, the pinch valve is released from the tube, and the product is in turn allowed to flow from the pouch and through the open end of the tube.
One of the drawbacks of this type of prior art dispenser and packaging is that during installation of the pouch and tube assembly into the dispenser, and during dispensing, there is a risk that bacteria or other unwanted substances can enter into the open ended tube and contaminate the product. If the product is a non-acid product, such as a milk-based product, it must be maintained under refrigeration to ensure the life of the product.
It is an object of the present invention to overcome one or more of the above-described drawbacks and/or disadvantages of the prior art.
In accordance with a first aspect, the present invention is directed to a flexible pouch and valve assembly for aseptically storing a substance, dispensing multiple portions of the stored substance therefrom, and maintaining substance remaining in the pouch in an aseptic condition sealed with respect to ambient atmosphere. The flexible pouch and valve assembly are receivable within a relatively rigid housing, and are adapted to cooperate with a pump for pumping discrete portions of substance from the pouch and through the one-way valve to dispense the substance therefrom. The assembly comprises a flexible pouch defining therein a variable-volume storage chamber sealed with respect to the ambient atmosphere for aseptically storing therein multiple portions of the substance. A one-way valve of the assembly includes a valve body defining an axially-extending valve seat, and at least one flow aperture extending through at least one of the valve body and valve seat. A valve cover is mounted on the valve body, and includes an axially-extending portion formed of an elastic material overlying the valve seat and covering a substantial axially-extending portion thereof. The valve portion defines a predetermined radial thickness and forms an interference fit with the valve seat, the valve portion and the valve seat define an axially-extending seam therebetween forming a normally closed, axially-extending valve opening, and the valve portion is movable radially between (i) a normally closed position with the valve portion engaging the valve seat, and (ii) an open position with at least a segment of the valve portion spaced radially away from the valve seat to connect the valve opening in fluid communication with the at least one flow aperture and thereby allow the passage of substance from the variable-volume storage chamber through the valve opening. In the normally closed and open positions, the one-way valve maintains substance remaining in the variable-volume storage chamber in an aseptic condition and sealed with respect to the ambient atmosphere.
In some embodiments of the present invention, the flexible pouch defines a sealed, empty, aseptic storage chamber adapted to receive therein a substance to be stored and dispensed therefrom. In some embodiments of the present invention, the flexible pouch is aseptically filled with a substance that is at least one of a food and beverage. In one such embodiment, the pouch is formed of a plastic laminate including an oxygen/water barrier and an approved food contact layer. In one such embodiment, the substance is selected from the group including a milk-based product, milk, evaporated milk, condensed milk, cream, half-and-half, baby formula, growing up milk, yogurt, soup, ice cream, juice, syrup, coffee, condiments, ketchup, mustard, mayonnaise, and coffee aroma.
Some embodiments of the present invention further comprise a flexible tube coupled in fluid communication between the pouch and one-way valve. In one such embodiment, the flexible tube is connected to the flexible pouch and one-way valve by at least one of (i) a fitting mounted on at least one of the flexible pouch and one-way valve that frictionally engages a respective end of the tube to form a hermetic seal therebetween, (ii) a heat seal, (iii) a weld, and (iv) an adhesive.
In some embodiments of the present invention, the assembly further includes an elastic actuator coupled in fluid communication between the pouch and one-way valve that is manually movable to pump substance from the variable-volume storage chamber through the one-way valve. In one such embodiment, the elastic actuator is approximately dome-shaped. Some such embodiments further comprise a manually-engageable operator that is manually engageable to depress the elastic actuator and, in turn, dispense substance from the variable-volume storage chamber through the one-way valve. In some such embodiments, the manually-engageable operator is a lever.
In some embodiments of the present invention, the assembly further comprises a relatively rigid container receiving therein the flexible pouch. In some such embodiments, the relatively rigid container is made of either cardboard or plastic.
In accordance with another aspect, the present invention is directed to the assembly in combination with a dispenser. The dispenser comprises a relatively rigid container receiving therein the flexible pouch, and a surface for supporting and positioning the one-way valve for dispensing substances therefrom and into another container. In one such embodiment, the dispenser further includes a pump operatively coupled between the variable-volume storage chamber and the one-way valve, and a control unit electrically coupled to the pump to control operation of the pump and, in turn, control dispensing of substance within the variable-volume storage chamber, through the one-way valve, and into the other container. In one such embodiment, the dispenser includes at least one pouch, and the at least one pouch includes at least one of coffee, coffee concentrate, milk, milk-based product, half-and-half, and creamer. In one such embodiment, the dispenser further includes at least one pouch containing coffee aroma.
In accordance with another aspect, the present invention is directed to a flexible pouch and valve assembly for aseptically storing a substance, dispensing multiple portions of the stored substance therefrom, and maintaining substance remaining in the pouch in an aseptic condition sealed with respect to ambient atmosphere. The flexible pouch and valve assembly are receivable within a relatively rigid housing and adapted to cooperate with a pump for pumping discrete portions of substance from the pouch and through the one-way valve to dispense the substance therefrom. The assembly comprises first means defining therein a flexible, variable-volume storage chamber sealed with respect to the ambient atmosphere for aseptically storing therein multiple portions of the substance. The assembly further comprises second means for allowing substance from the variable-volume storage chamber to be dispensed therethrough, and for maintaining the substance remaining in the variable-volume storage chamber in an aseptic condition and sealed with respect to the ambient atmosphere during and after dispensing of substance therethrough. The second means includes third means for forming an axially-extending valve seat and at least one flow aperture. The second means also includes fourth means mounted on the third means and defining an elastic, axially-extending portion overlying the third means and covering a substantial axially-extending portion thereof, defining a predetermined radial thickness and forming an interference fit with the third means, and defining an axially-extending seam between the third and fourth means, for forming a normally closed, axially-extending valve opening, and for moving radially between (i) a normally closed position with the fourth means engaging the third means, and (ii) an open position with at least a segment of the fourth means spaced radially away from the third means, to connect the valve opening in fluid communication with the at least one flow aperture and thereby allow the passage of substance from the variable-volume storage chamber through the valve opening. The fourth means cooperates with the third means to maintain the substance remaining in the variable-volume storage chamber in an aseptic condition and sealed with respect to the ambient atmosphere in the normally closed and open positions.
In one embodiment of the present invention, the variable-volume storage chamber contains a milk-based product, and the second means is for substantially preventing micro-organisms from entering into the variable-volume storage chamber and for permitting the milk-based product to be stored and dispensed without refrigeration.
In one embodiment of the present invention, the first means is a flexible pouch, the second means is one-way valve, the third means is a valve body, and the fourth means is a flexible valve cover.
In accordance with another aspect, the present invention is directed to a method for storing fluid and dispensing multiple portions of the stored fluid therefrom, comprising the following steps:
In some embodiments of the present invention, the method further comprises the step of providing a hermetically sealed variable-volume storage chamber and storing therein multiple portions of the fluid in a substantially airless condition, and maintaining the fluid in the variable-volume storage chamber substantially airless during the shelf life and dispensing of fluid through the one-way valve assembly. In some embodiments of the present invention, the method further comprises the step of providing a pump coupled between the storage chamber and the one-way valve assembly and pumping with the pump discrete portions of fluid from the storage chamber, through the flow aperture, and in turn through the valve opening.
In some embodiments of the present invention, the method further comprises the steps of: (i) providing at least one of the storage chamber, pump and one-way valve assembly with a needle penetrable and thermally resealable portion; and (ii) filling the storage chamber with the fluid by penetrating the needle penetrable and thermally resealable portion with a needle, introducing the fluid through the needle and into the storage chamber, withdrawing the needle, and hermetically resealing a resulting needle hole in the needle penetrable and thermally resealable portion by applying thermal energy thereto.
In one such embodiment, the method further comprises the step of forming a substantially transparent needle penetrable and thermally resealable portion by combining (i) a styrene block copolymer; (ii) an olefin; (iii) a pigment added in an amount of less than about 150 ppm; and (iv) a lubricant. In one such embodiment, the pigment is a substantially transparent near infrared absorber.
In some embodiments of the present invention, the variable-volume storage chamber is defined by (i) a flexible pouch, including, for example, the interior of a flexible pouch, or the space between a flexible pouch and a relatively rigid vessel or like body, or (ii) a rigid body including, for example, a piston slidably received within the body, and forming a fluid-tight seal between a peripheral portion of the piston and the body, and defining the variable-volume storage chamber between the piston and the flow aperture of the one-way valve assembly. In an alternative embodiment, a vessel or other body defines therein the storage chamber and includes a filter coupled in fluid communication between the storage chamber and ambient atmosphere for filtering air or other gas flowing into the chamber upon dispensing fluid therefrom to sterilize the air or other gas flowing into the chamber and thereby maintain an aseptic condition of the fluid within the chamber. In each case, the method further comprises the step of sterilizing the sealed, empty flexible variable-volume storage chamber or other storage chamber prior to filling same. Preferably, the sterilizing step includes at least one of (i) transmitting radiation, such as gamma or e-beam radiation, and (ii) transmitting a fluid sterilant, such as VHP, onto the storage chamber.
In some embodiments of the present invention, the method comprises the step of aseptically filling the storage chamber with at least one of a milk-based product, a baby formula, and a water-based product. One such embodiment further comprises the step of maintaining the milk-based product, baby formula, or water-based product substantially preservative-free substantially throughout the filling and dispensing of the product. One such embodiment further comprises the step of maintaining the milk-based product, baby formula, or water-based product substantially at ambient temperature throughout the shelf-life and dispensing of multiple servings of the product from the storage chamber.
Some embodiments of the present invention further comprise the steps of: (i) providing a flexible tube coupled on one end in fluid communication with the storage chamber, and coupled on another end in fluid communication with a one-way valve assembly, and a pump in the form of a peristaltic pump; and (ii) engaging with the peristaltic pump an external portion of the flexible tube and pumping discrete portions of fluid therethrough.
Other embodiments of the present invention further comprise the steps of: (i) providing a pump in the form of a manually-engageable pump or pedal-actuated pump including a compression chamber, a compressive surface receivable within the compression chamber, and a manually-engageable actuator or pedal coupled to at least one of the compression chamber and compressive surface; and (ii) manually engaging the manually-engageable actuator or engaging the pedal and moving with the actuator or pedal at least one of the compressive surface and compression chamber relative to the other between a rest position and at least one actuated position and, in turn, pressurizing fluid within the compression chamber and dispensing fluid through the one-way valve assembly.
One advantage of the apparatus and method of the present invention is that the one-way valve assembly can hermetically seal the product in the variable-volume storage chamber throughout the shelf life and multiple dispensing of the product. As a result, non-acid products, such as milk-based products, do not require refrigeration during shelf life or usage of the product. Other advantages of the apparatus and method of the present invention will become readily apparent in view of the following detailed description and accompanying drawings.
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The valve assembly 12 otherwise is preferably constructed in accordance with the teachings of the following commonly assigned, co-pending patent applications which are hereby incorporated by reference in their entireties as part of the present disclosure: U.S. patent application Ser. No. 10/640,500, filed Aug. 13, 2003, entitled “Container And Valve Assembly For Storing And Dispensing Substances, And Related Method”, U.S. patent application Ser. No. 29/174,939, filed Jan. 27, 2003, entitled “Container and Valve Assembly”, U.S. patent application No. 60/613,583, filed Sep. 27, 2004, entitled “Laterally-Actuated Dispenser with One-Way Valve for Storing and Dispensing Metered Amounts of Substances”, U.S. patent application Ser. No. 29/188,310, filed Aug. 15, 2003, entitled “Tube and Valve Assembly”, U.S. patent application Ser. No. 29/191,510, filed Oct. 7, 2003, entitled “Container and Valve Assembly”, and U.S. patent application Ser. No. 60/528,429, filed Dec. 10, 2003, entitled “Valve Assembly And Tube Kit For Storing And Dispensing Substances, And Related Method”.
In accordance with such teachings, at least one of the valve seat diameter D2, the degree of interference between the valve portion 42 and valve seat 34 (as indicated by the overlapping lines in
The flow aperture 36 extends angularly relative the valve seat. In the illustrated embodiment, the flow aperture extends angularly within the range of about 30° to about 45°. However, as may be recognized by those of ordinary skill in the pertinent art based on the teachings herein, this angular range is only exemplary, and may be changed as desired, or otherwise required. In addition, one or more additional flow apertures 36 may be added and angularly spaced relative to the aperture 36 as shown, for example, in any of the commonly-assigned, co-pending patent applications incorporated by reference above.
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The valve assembly 12 further includes a protective cover or shield 66 that extends annularly about the flexible valve cover 38, and extends axially from the base of the valve cover 38 to a point adjacent to the dispensing tip of the valve but spaced axially inwardly therefrom. As shown in
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The fitting 46 includes an annular mounting flange 84 that is received within a corresponding mounting recess 86 to mount the fitting to the valve body 30. As shown in
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In one embodiment, the material of the pouch 222 is an oxygen/water barrier material. An exemplary such material is a plastic laminate with an approved food contact material layer. In one such embodiment, the material is a heat-sealable film including an oxygen/water barrier layer and, preferably, an outer layer exhibiting appropriate wear and flexibility properties. Examples of suitable outer layers are nylon, either linear or biaxially orientated, polyethylene, polypropylene, and polystyrene. Examples of oxygen/water barrier materials are ethylene vinyl alcohol (EVOH) and silicon oxide. An exemplary heat-sealable material is polyethylene, such as linear low-density, ultra linear low-density, high-density or metallocene catalyzed polyethylene. An exemplary pouch material is a laminate including a nylon co-polymer, on the outside, EVOH, and metallocene catalyzed polyethylene on the inside, wherein the layers of the laminate are adhered together in a manner known to those of ordinary skill in the pertinent art. As may be recognized by those of ordinary skill in the pertinent art, if the tube is not provided as an integral part of the pouch, anti-block additives should be avoided to ensure good pouch-edge/tube fusion.
The tube 214 preferably is made of a material that is sufficiently soft that it can be squeezed or otherwise deformed by, for example, the peristaltic pump 218, but does not puncture or permanently deform when so squeezed or deformed. In one embodiment of the present invention, the material is a co-extruded metallocene catalyzed polyethylene, such as the metallocene catalyzed resin sold by Dow Chemical Corporation under the designation Dow AG 8180. As indicated above, the tube material may be heat sealed, crimped, or adhesively attached to the pouch material.
The dimensions of the tube 214 can be adapted to the type of food material or other substance to be dispensed therethrough. In some embodiments, the internal diameter of the tube is within the range of about 5 mm to about 15 mm, and preferably is within the range of about 7 mm to about 8 mm. In some such embodiments, the thickness of the tube material is within the range of about 1 mm to about 2 mm, and in one such embodiment, the thickness is about 1.5 mm. The length of the tube 214 may be set as desired or otherwise required by a particular dispensing system. In some embodiments, the length of the tube is within the range of about 15 cm to about 25 cm. As may be recognized by those of ordinary skill in the pertinent art based on the teachings herein, the materials of construction of the pouch, tube and valve assembly, may take the form of any of numerous different materials that are currently known, or that later become known for performing the functions of the respective components. Similarly, the dimensions of these components, and the manner in which these components are connected or otherwise formed, may take any of numerous different dimensions or configurations as desired or otherwise required. For example, the materials of the pouch, or the dimensions of the pouch and tube, may be the same as disclosed in U.S. Pat. No. 6,024,252, which is hereby expressly incorporated by reference in its entirety as part of the present disclosure.
Depending on the design of the housing 216 of the dispenser, it may not be necessary to arrange the pouch 222 within the box 225. However, the box 225 can provide a convenient mechanism for holding and transporting the flexible pouch 222, and/or for mounting the pouch 222 within the dispenser housing 216. In one embodiment of the present invention, the box 216 is a cardboard box of a type known to those of ordinary skill in the pertinent art. As shown in
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The dome-shaped actuator 315 is made of an elastomeric material that is flexible and can be manually engaged and pressed inwardly to operate the actuator and thereby pump fluid from the variable-volume storage chamber 324 through the one-way valve 312. As shown in
The one-way valve 312 also includes an inlet passageway 348 extending through the tube 314 and coupled in fluid communication with the variable-volume storage chamber 324 (
The valve assembly 312 otherwise may be constructed in accordance with the teachings of the commonly assigned, co-pending patent applications incorporated by reference above. In accordance with such teachings, at least one of the valve seat diameter D2 (as shown in
The valve assembly 312 further includes a protective cover or shield 366 (not shown in
The one-way valve assembly 312 operates as follows. The dome-shaped actuator 315 is pressed downward, such as my manual engagement, to pressurize and in turn displace a substantially predetermined volume of fluid located within the compression chamber 332. The resulting fluid pressure within the compression chamber 332 causes the flap 317 to seal itself against the valve body wall surrounding the inlet passageway 348 to thereby prevent fluid communication between the inlet passageway and compression chamber. If desired, the flap 317 and/or the wall surrounding the inlet passageway 348 may be angled to assist in creating a seal between the flap and wall. A substantially predetermined volume of fluid then moves from the compression chamber 332 through the flow aperture 336, into valve seat 334, and out through the valve opening 344. When the actuator 315 is pressed downwardly, the chamber 332 is emptied or substantially emptied. When the user releases the actuator 315, a vacuum is created within the chamber 332 and the flap swings outwardly away from passageway 348, as indicated by the arrow in
If desired, and as shown typically in
As may be recognized by those of ordinary skill in the pertinent art based on the teachings herein, the actuator 315, and the compression chamber 332 may take any of numerous different shapes and/or configurations, and/or may be formed of any of numerous different materials that are currently known, or that later become known for performing the functions of these components. For example, the compression chamber 332 may define a curvilinear shape to facilitate engagement between the underside of the dome-shaped actuator and compression chamber on the downward stroke of the actuator. Similarly, the underside of the actuator may form a more traditional piston shape, such as a cylindrical protrusion, that is slidably received within a correspondingly shaped compression chamber. In addition, the actuator may include a lever or other operator that is manually engageable to depress the actuator and, in turn, dispense metered amounts or substantially metered amounts of fluids from the variable-volume storage chamber and through the one-way valve.
In an alternative embodiment shown in
The apparatus and methods for pre-sterilizing the sealed, empty pouch, tube and valve assemblies, for assembling the stopper to the pouch or other container, and/or for aseptically needle filling the sterilized pouch, tube and valve assemblies through the needle penetrable and laser resealable stoppers, may take the form of any of the apparatus and methods disclosed in the following commonly assigned patents and patent applications which are hereby expressly incorporated by reference as part of the present disclosure: U.S. patent application Ser. No. 10/766,172, filed Jan. 28, 2004, entitled “Medicament Vial Having A Heat-Sealable Cap, And Apparatus and Method For Filling The Vial”, which is a continuation-in-part of similarly titled U.S. patent application Ser. No. 10/694,364, filed Oct. 27, 2003, which is a continuation of similarly titled co-pending U.S. patent application Ser. No. 10/393,966, filed Mar. 21, 2003, which is a divisional of similarly titled U.S. patent application Ser. No. 09/781,846, filed Feb. 12, 2001, now U.S. Pat. No. 6,604,561, issued Aug. 12, 2003, which, in turn, claims the benefit of similarly titled U.S. Provisional Application Ser. No. 60/182,139, filed Feb. 11, 2000; and U.S. Provisional Patent Application No. 60/443,526, filed Jan. 28, 2003; and similarly titled U.S. Provisional Patent Application No. 60/484,204, filed Jun. 30, 2003; U.S. patent application Ser. No. 10/655,455, entitled “Sealed Containers And Methods Of Making And Filling Same”, filed Sep. 3, 2003, which, in turn, claims the benefit of similarly-titled U.S. Provisional Patent Application No. 60/408,068 filed Sep. 3, 2002; U.S. Provisional Patent Application No. 60/551,565, filed Mar. 8, 2004, titled “Apparatus and Method for Molding and Assembling Containers with Stoppers”; U.S. patent application Ser. No. 10/600,525 filed Jun. 19, 2003 titled “Sterile Filling Machine Having Needle Filling Station Within E-Beam Chamber”, which, in turn, claims the benefit of similarly-titled U.S. Provisional Application No. 60/390,212 filed Jun. 19, 2002; U.S. patent application Ser. No. 10/983,178 filed Nov. 5, 2004 titled “Needle Filling and Laser Sealing Station”, which, in turn, claims the benefit of similarly-titled U.S. Provisional Patent Application No. 60/518,267 filed Nov. 7, 2003 and similarly-titled U.S. Provisional Patent Application No. 60/518,685 filed Nov. 10, 2003; U.S. Provisional Patent Application No. 60/550,805 filed Mar. 5, 2004 titled “Apparatus for Needle Filling and Laser Resealing”; and U.S. patent application Ser. No. 08/424,932 filed Apr. 11, 1995 now U.S. Pat. No. 5,641,004 issued Jun. 24, 1997 titled “Process for Filling a Sealed Receptacle Under Aseptic Conditions”.
In the currently-preferred embodiments of the present invention, each resealable stopper is formed of a thermoplastic material defining a needle penetration region that is pierceable with a needle to form a needle aperture therethrough, and is heat resealable to hermetically seal the needle aperture by applying laser radiation at a predetermined wavelength and power thereto. Each stopper includes a thermoplastic body defining (i) a predetermined wall thickness in an axial direction thereof, (ii) a predetermined color and opacity that substantially absorbs the laser radiation at the predetermined wavelength and substantially prevents the passage of the radiation through the predetermined wall thickness thereof, and (iii) a predetermined color and opacity that causes the laser radiation at the predetermined wavelength and power to hermetically seal the needle aperture formed in the needle penetration region thereof in a predetermined time period and substantially without burning the needle penetration region and/or the cover portion of the cap (i.e., without creating an irreversible change in molecular structure or chemical properties of the material). In some embodiments, the predetermined time period is approximately 2 seconds, is preferably less than or equal to about 1.5 seconds, and most preferably is less than or equal to about 1 second. In some of these embodiments, the predetermined wavelength of the laser radiation is about 980 nm, and the predetermined power of each laser is preferably less than about 30 Watts, and preferably less than or equal to about 10 Watts, or within the range of about 8 to about 10 Watts. Also in some of these embodiments, the predetermined color of the material is gray, and the predetermined opacity is defined by a dark gray colorant (or pigment) added to the stopper material in an amount within the range of about 0.3% to about 0.6% by weight.
In addition, if desired, a lubricant of a type known to those of ordinary skill in the pertinent art may be added to or included within each of the above-mentioned thermoplastic compounds, in order to prevent or otherwise reduce the formation of particles upon penetrating the needle penetration region of the thermoplastic portion with the needle. In one embodiment, the lubricant is a mineral oil that is added to the styrene block copolymer or other thermoplastic compound in an amount sufficient to prevent, or substantially prevent, the formation of particles upon penetrating same with the needle or other filling member. In another embodiment, the lubricant is a silicone, such as the liquid silicone sold by Dow Corning Corporation under the designation “360 Medical Fluid, 350 CST”, or a silicone oil, that is added to the styrene block copolymer or other thermoplastic compound in an amount sufficient to prevent, or substantially prevent, the formation of particles upon penetrating same with the needle or other filling member. In one such embodiment, the silicone oil is included in an amount within the range of about 0.4% to about 1% by weight, and preferably within the range of about 0.4 to about 0.6% by weight, and most preferably within the range of about 0.51 or about 0.5% by weight.
As described above, the configuration of the needle that is penetrating the stopper, the friction forces created at the needle/stopper interface, and/or the needle stroke through the stopper also can be controlled to further reduce or substantially prevent the formation of particles upon penetrating the stoppers with the needles.
Also in accordance with a currently preferred embodiment, the needle penetrable and laser resealable stopper comprises: (i) a styrene block copolymer, such as any such styrene block copolymers described above, within the range of about 80% to about 97% by weight (e.g., 95% by weight as described above); (ii) an olefin, such as any of the ethylene alpha-olefins, polyolefins or olefins described above, within the range of about 3% to about 20% by weight (e.g., about 5% as described above); (iii) a pigment or colorant added in an amount sufficient to absorb the laser energy, convert the radiation to heat, and melt the stopper material, preferably to a depth equal to at least about ⅓ to about ½ of the depth of the needle hole, within a time period of less than about 3 seconds, more preferably less than about 1½ seconds, and most preferably less than about ½ second; and (iv) a lubricant, such as a mineral oil, liquid silicone, or silicone oil as described above, added in an amount sufficient to substantially reduce friction forces at the needle/stopper interface during needle penetration of the stopper to, in turn, substantially prevent particle formation.
In one embodiment of the invention, the pigment is sold under the brand name Lumogen™ IR 788 by BASF Aktiengesellschaft of Ludwigshafen, Germany. The Lumogen IR products are highly transparent selective near infrared absorbers designed for absorption of radiation from semi-conductor lasers with wavelengths near about 800 nm. In this embodiment, the Lumogen pigment is added to the elastomeric blend in an amount sufficient to convert the radiation to heat, and melt the stopper material, preferably to a depth equal to at least about ⅓ to about ½ of the depth of the needle hole, within a time period of less than about 3 seconds, more preferably less than about 1-½ seconds, and most preferably less than about ½ second. The Lumogen IR 788 pigment is highly absorbent at about 788 nm, and therefore in connection with this embodiment, the laser preferably transmits radiation at about 788 nm (or about 800 nm). One advantage of the Lumogen IR 788 pigment is that very small amounts of this pigment can be added to the elastomeric blend to achieve laser resealing within the time periods and at the resealing depths required or otherwise desired, and therefore, if desired, the needle penetrable and laser resealable stopper may be transparent or substantially transparent. This may be a significant aesthetic advantage. In one embodiment of the invention, the Lumogen IR 788 pigment is added to the elastomeric blend in a concentration of less than about 150 ppm, is preferably within the range of about 10 ppm to about 100 ppm, and most preferably is within the range of about 20 ppm to about 80 ppm. In this embodiment, the power level of the 800 nm laser is preferably less than about 30 Watts, or within the range of about 8 Watts to about 18 Watts.
Also in accordance with a currently preferred embodiment, in addition controlling one or more of the above-mentioned parameters to reduce and/or eliminate the formation of particles (i.e., including the silicone oil or other lubricant in the thermoplastic compound, and controlling the configuration of the needle, the degree of friction at the needle/stopper interface, and/or the needle stroke through the stopper), the differential elongation of the thermoplastic components of the resealable stopper is selected to reduce and/or eliminate the formation of particles.
Thus, in accordance with such embodiment, the needle penetrable and laser resealable stopper comprises: (i) a first thermoplastic material within the range of about 80% to about 97% be weight and defining a first elongation; (ii) a second thermoplastic material within the range of about 3% to about 20% by weight and defining a second elongation less than the elongation of the first material; (iii) a pigment or colorant added in an amount sufficient to absorb the laser energy, convert the radiation to heat, and melt the stopper material, preferably to a depth equal to at least about ⅓ to about ½ of the depth of the needle hole, within a time period of less than about 2 seconds, more preferably less than about 1.5 seconds, and most preferably less than about 1 second; and (iv) a lubricant, such as a mineral oil, liquid silicone, or silicone oil as described above, added in an amount sufficient to substantially reduce friction forces at the needle/stopper interface during needle penetration of the stopper to, in turn, substantially prevent particle formation.
In accordance with a further aspect, the first material defines a lower melting point (or Vicat softening temperature) than does the second material. In some of the embodiments, the first material is a styrene block copolymer, and the second material is an olefin, such as any of a variety of ethylene alpha-olefins or polyolefins. Also in accordance with a currently preferred embodiment, the first material defines an elongation of at least about 75% at 10 lbs force (i.e., the length increases by about 75% when subjected to a 10 lb. force), preferably at least about 85%, and most preferably at least about 90%; and the second material defines an elongation of at least about 5% at 10 lbs force, preferably at least about 10%, and most preferably at least about 15%, or within the range of about 15% and about 25%.
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The one-way valve assembly 412 includes a valve body 430 defining an axially-extending valve seat 434, and an elongated flow aperture 436 formed within the valve body 430 and extending in fluid communication between the compression chamber 432 and the valve seat 434. The one-way valve assembly 412 further includes a valve cover 438 formed of an elastic material and integral with the dome-shaped actuator 415. The valve cover 438 includes a cover base 440 mounted on the valve body 430 and fixedly secured against movement relative thereto by a flange 467 of a relatively rigid snap ring 466, and a valve portion 442 overlying the valve seat 434. As shown in
As shown in
In the operation of the assembly 410, a user dispenses a substantially predetermined amount of fluid through the one-way valve 412 by manually engaging the dome-shaped actuator 415 with, for example, one or more fingers or the palm of a hand, and depresses the dome-shaped actuator downwardly. On the downward or inner stroke of the actuator, the free end of the compression chamber valve member 417 is received within the outlet aperture 448 of the tube 414 to thereby block the flow of any fluid between the compression chamber 432 and storage chamber 424. Then, as the dome-shaped actuator 415 is further depressed, the fluid within the compression chamber 432 is sufficiently pressurized to exceed the valve opening pressure of the one-way valve 412 and, in turn, open the valve and dispense substantially all of the fluid within the compression chamber through the valve. The user then removes his or her hand from the dome-shaped actuator 415, and the spring force inherent within the elastic dome-shaped actuator drives the actuator to return to its original shape or ready position as shown typically in
As may be recognized by those of ordinary skill in the pertinent art based on the teachings herein, the pouch or dome-shaped actuator may include a needle penetrable and laser resealable stopper or other portion for needle filling the variable-volume storage chamber and laser resealing the resulting needle hole as described above. The pouch 422 and box 425 may be made of the same materials as the pouch and box described above, respectively, or may be made of any of numerous other materials that are currently known, or that later become known. For example, the box 425 may be made of plastic, such as by blow molding or thermoforming. In addition, the one-valve 412 may define a configuration that is the same as or more similar to any of the one-way valves described above in connection with the other embodiments.
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One advantage of the present invention is that the same product may remain shelf-stable in the pouch, whether refrigerated or not, throughout the shelf life and usage of the pouch. Accordingly, the present invention is particularly suitable for storing and dispensing ready-to-drink products, including non-acid products, such as those that are generally difficult to preserve upon opening of the package, including without limitation, drinks such as wine, milk-containing drinks, cocoa-based drinks, malt based drinks, tea, coffee, coffee concentrate, tea concentrate, other concentrates for making beverage or food products, sauces, such as cheese and milk, or meat-based sauces, gravies, soups, and nutritional drink supplements, meal replacements, baby formulas, milks, growing-up milks, etc. Accordingly, a significant advantage of the currently preferred embodiments of the present invention is that they allow the above-mentioned and any of numerous other products to be distributed and stored at an ambient temperature and allow the product to remain shelf-stable even after dispensing product from the pouch, whether refrigerated or not. However, for certain products it may be desirable to refrigerate the product to provide a better taste, to provide the product at a desired or customary temperature, or for any of numerous reasons that are currently known or that later become known.
This patent application contains subject matter related to that disclosed in U.S. patent application Ser. No. 11/295,274, filed Dec. 5, 2005, entitled “One-Way Valve And Apparatus Using The Valve”, U.S. patent application Ser. No. 11/295,251, filed Dec. 5, 2005, entitled “Method Of Using One-Way Valve And Related Apparatus”, U.S. Provisional Patent Application Ser. No. 60/633,332, filed Dec. 4, 2004, U.S. Provisional Patent Application Ser. No. 60/644,130, filed Jan. 14, 2005, both of which are entitled “One-Way Valve, Apparatus and Method of Using the Valve”, U.S. Provisional Patent Application Ser. No. 60/757,161, filed Jan. 5, 2006, and U.S. Provisional Patent Application Ser. No. 60/843,131, filed Sep. 9, 2006, both of which are entitled “One-Way Valve and Apparatus and Method of Using the Valve”. Each of the foregoing patent applications is hereby incorporated by reference in its entirety as part of the present disclosure.
As may be recognized by those of ordinary skill in the pertinent art based on the teachings herein, numerous changes and modifications may be made to the above-described and other embodiments of the present invention without departing from the spirit of the invention as defined in the claims. For example, the components of the apparatus may be made of any of numerous different materials that are currently known, or that later become known for performing the function(s) of each such component. Similarly, the components of the apparatus may take any of numerous different shapes and/or configurations, additional components may be added, components may be combined, and one or more components or features may be removed.
In addition, the apparatus may be used to dispense any of numerous different types of fluids or other substances for any of numerous different applications, including, for example, nutritional, food, beverage, hospital, biopharmaceutical, bioprocessing and pharmaceutical applications. For example, the dispenser may take the form of an automated food or beverage dispenser of the type disclosed in U.S. patent application Ser. No. 10/328,826, filed Dec. 24, 2002, entitled “Clean-In-Place Automated Food Or Beverage Dispenser” (Publication No. US 2004/0118291 A1), or U.S. patent application Ser. No. 10/833,110, filed Apr. 28, 2004, entitled “Clean-In-Place Automated Food Or Beverage Dispenser” (Publication No. US 2004/0194811 A1), each of which is hereby expressly incorporated by reference as part of the present disclosure. In this exemplary application, the tube and one-way valve assembly disclosed herein replaces the tube and pinch valve coupled between the reservoir and manifold. Alternatively, the one-way valve, tube and pouch assemblies disclosed herein replace each tube and pinch valve and associated reservoir disclosed in such patent applications. A significant advantage of this application is that the one-way valve substantially prevents any micro-organisms from entering into the reservoir that may contain a milk-based product, and further, permits the milk-based product to be dispensed at ambient temperature without requiring refrigeration of the container. In addition, the one-way valve, tube and pouch assemblies may be used to store any of numerous different products for dispensing, such as milk-based products, including milk concentrate, half-and-half, and other creamers, baby food or formulas, growing-up milks, other liquid nutrition products, coffee, coffee concentrate, tea, tea concentrate, syrup, such as chocolate syrup for hot chocolate, cappuccino syrups, or other drink mixes or syrups, coffee aroma for dispensing a “fresh” coffee aroma at the time of, or substantially the same time of, dispensing coffee, or other dairy products such as yogurt and ice cream, or non-dairy products, such as juices, soy-based products, nutritional supplement drinks, functional food products, drink mixes, or meal replacement drinks.
Further, the filling machines used to fill the reservoirs used with the apparatus of the present invention may take any of numerous different configurations that are currently known, or that later become known for filling the reservoirs, pouches or dispensers. For example, the filling machines may have any of numerous different mechanisms for sterilizing, feeding, evacuating and/or filling the one-way valve, tube and pouch assemblies, or otherwise for filling the reservoirs. In addition, rather than use the needle penetrable and resealable stopper, the reservoir may employ a filling valve as disclosed in the following patent application that is assigned to the Assignee of the present invention, and is hereby incorporated by reference as part of the present disclosure: U.S. application Ser. No. 10/843,902, filed May 12, 2004, titled “Dispenser and Apparatus and Method for Filling a Dispenser”. In such alternative embodiments, the filling valve may extend through the pouch or otherwise may be coupled in fluid communication with the storage chamber to evacuate and/or fill the storage chamber. Alternatively, the reservoir may include a one-way valve for evacuating the interior of the reservoir and another valve for filling the storage chamber of the reservoir. In addition, any of numerous different types of pouch filling machines and/or methods that are currently known, or that later become known, may be used instead. Still further, the pump and/or dispensing valve each may take a configuration that is different than that disclosed herein. For example, the pump may take the form of any of numerous different pumps that are currently known, or that later become known. For example, the pump may include a piston that is movable within a piston chamber connectable in fluid communication with the tube and/or variable-volume storage chamber, and a manually engageable portion that is manually engageable to move the piston and, in turn, pump the substance from the variable volume storage chamber through the one-way valve. Alternatively, instead of a dome-shaped member, the pump may define an elastic squeeze bulb that is manually squeezed to dispense a substantially metered volume of fluid from the variable-volume storage chamber and through the one-way valve, or may define a different type of manually engageable actuator and a different type of spring, such as a coil spring, or an elastic spring, that creates sufficient spring force on a downward stroke of the manually engageable actuator to return the actuator to its ready position when released by the user. Alternatively, the pump may include a lever coupled to a piston or to a dome-shaped member for dispensing fluids through the valve, or may include another type of manually engageable member or pedal that is currently known, or that later becomes known. Accordingly, this detailed description of currently preferred embodiments is to be taken in an illustrative, as opposed to a limiting sense.
This patent application is a continuation of U.S. patent application Ser. No. 12/901,422, filed Oct. 8, 2010, now U.S. Pat. No. 8,104,644, entitled “One-Way Valve and Apparatus and Method of Using the Valve,” which is a continuation of U.S. patent application Ser. No. 11/650,102, filed Jan. 5, 2007, now U.S. Pat. No. 7,810,677, entitled “One-Way Valve and Apparatus and Method of Using the Valve,” which is a continuation-in-part of U.S. patent application Ser. No. 11/295,274, filed Dec. 5, 2005, now U.S. Pat. No. 7,278,553, entitled “One-Way Valve and Apparatus Using the Valve,” which claims priority to U.S. Provisional Patent Application No. 60/633,332, filed Dec. 4, 2004 and U.S. Provisional Patent Application No. 60/644,130, filed Jan. 14, 2005, both of which are entitled “One-Way Valve, Apparatus and Method of Using the Valve.” This patent also claims priority to U.S. Provisional Patent Application Ser. No. 60/757,161, filed Jan. 5, 2006, entitled “One-Way Valve and Apparatus and Method of Using the Valve.” Each of the foregoing patent applications is hereby incorporated by reference in its entirety as part of the present disclosure.
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| Number | Date | Country | |
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| Child | 13362532 | US | |
| Parent | 11650102 | Jan 2007 | US |
| Child | 12901422 | US |
| Number | Date | Country | |
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| Parent | 11295274 | Dec 2005 | US |
| Child | 11650102 | US |
