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Publication numberUS3595467 A
Publication typeGrant
Publication dateJul 27, 1971
Filing dateJan 15, 1969
Priority dateJan 23, 1968
Also published asDE1903048A1, DE1903048B2
Publication numberUS 3595467 A, US 3595467A, US-A-3595467, US3595467 A, US3595467A
InventorsGoglio Luigi
Original AssigneeGoglio Luigi
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible sealed container provided with a one-way safety valve
US 3595467 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent [72] Inventor LuigiGoglio Via Solari 10, Milan, Italy 121] AppLNo. 791,304 [22] Filed Jan.l5,l969 [45] Patented July27,l97l [32] Priority Jan.23, 1968 [3 1 a y {31] Il893A/68 {54] FLEXIBLE SEALED CONTAINER PROVIDED WITH A ONE-WAY SAFETY VALVE 9 Claims, 3 Drawing Figs.

[52] U.S.Cl 229/62.5, 137/525, 137/5253, 220/44 R, 222/396, 222/494 [51] lnt.Cl ..B65d3l/l4 [50] FieldoiSearch 150/9; 137/525, 525.3; 220/44; 222/396, 494; 229/62.5, 53,DIG. l4;2l5/56 [56] References Cited UNITED STATES PATENTS 2,724,543 11/1955 Baver 229/625 2,822,961 2/1958 Seaquist 222/396X 3,081,919 3/1963 Samuel 222/396 3,197,119 7/1965 Hartigetal 229/62.5 3,302,859 2/1967 Perry 229/62.5X 3,371,849 3/1968 Rochla 229/62.5 3,374,805 3/1968 Trevarrow,.1r... 220/44X 3,430,842 3/1969 Yamaguchi 229/62.5 3,432,087 3/1969 Costello 229/62.5 2,138,376 11/1938 Griswold... 215/56 2,738,091 3/1956 Maddox 215/56 I /All 3,191,807 6/1965 Rodrigues,.lr

ABSTRACT: A container of flexible sheet material capable of being sealed and provided with a one-way valve. The sheet material of the container has a portion formed with an opening passing therethrough. The one-way valve has at this opening of the sheet material a base member formed with a valve opening which registers with the sheet material opening, this base member being fixed in a fluidtight manner to the sheet material of the container. The valve opening is covered by a flexible resilient element of the one-way valve, in the form ofa disc having a periphery situated beyond the valve opening and engaging that surface of the base member which is directed away from the interior of the container. Fixed to this latter surface of the base member is a hollow member defining with the base member a chamber in which the disc is located, and this hollow member has an interior projection holding the disc against the base member with the periphery of the disc extending beyond the projection of the hollow member. This hollow member is itself formed with a discharge opening communicating with the interior space of the chamber at a part thereof which is situated beside the projection in communication with the periphery of the disc. Thus, as long as the atmospheric pressure is greater than the interior pressure of the container the disc will be held against the base member closing the valve opening. However, when the interior pressure in the container exceeds atmospheric pressure the disc will yield to permit a fluid such as a gas at an undesirably highpressure to escape out of the interior of the container into the chamber of the hollow member and out through the discharge opening thereof to the outer atmosphere.


The present invention relates to packing within flexible sealed containers and simultaneously to improvement in preserving products which are generally perishable at air contact with the possibility of degassing in the long run, such as coffee or grated cheese (or the like).

The object of the present invention is substantially to achieve the possibility of adopting more economical containers, such as to ensure the same degree in product preservation as with rigid containers at present being used in many instances and further to ensure an excellent preservation of the packed products in the long run.

Thus, it is known, for example, that coffee to be preserved under the best conditions should beisolated from the external environment and have a minimized contact with air and oxygen, particularly to avoid oxidation and resulting going rancid of the essential oils, the latter forming, as a matter of fact, the elements providing flavor and taste.

This is achieved by vacuum packing the coffee.

However, coffee encloses within its alveoli a substantial amount of gas built up during roasting.

This gas is CO which slowly escapes from the coffee beans within some period oftime (from 2 to days) depending on the type of coffee and roasting degree.

Normally these gases are not removed during the vacuum stage which is accomplished during coffee packing, the opera tion requiring an excessive time (4 or 5 hours) whereby, following the packing and after some time, a pressure is brought about within the container due to gas emission, as previously stated.

Should the sealed container be rigid, such as tin or glass containers, it is sufficient to make such containers sturdy enough so that they will not yield under the double-stress condition, namely firstly a vacuum stress and secondly a pressure stress.

Nonsealed containers cannot be used for the above purposes since, as such, they would enable coffee to contact the external oxygen and hence could not allow coffee to be preserved.

In the case of flexible sealed containers, along with the problem of the double stress such containers are subjected to, there is also the problem of deformability whereby, while during vacuum stage the containers adhere to the product according to a predetermined shape, during gas generation stage said containers swell and deform.

In order to overcome such drawbacks, there is provided according to the present invention a container comprising a plurality of flexible sheet materials, at least one of which is a thermoplastic material, the container being such as to have a particular resistance to both external pressure and inside generating gas pressure, the container being also provided with a oneway safety valve for allowing the outlet of the inside generating gas when the pressure of said gas will exceed a predetermined value.

These and other significant features of the container ac cording to the present invention will be more apparent from the following description related to the accompanying draw- Y ing, schematically showing by mere way of nonrestrictive example an embodiment of the container according to the invention, and particularly:

FIG. I is a perspective view of the container;

FIG. 2 is a cross section of said container as taken along line 2-2 of FIG. I; and

FIG. 3 is a sectional view showing a valve as applied to the container.

The flexible sealed container according to the present invention, essentially conceived for resisting a double-stress condition in subsequent steps, namely an outside-to-inside pressure condition and an inside-to-outside pressure condition, can be made by materials which are generally formed of a plurality of film laminates, the inner of which is of thermosealing material.

Particularly, in the illustrated example, the container is made in the form of a bellows, as shown in FIGS. 1 and 2, wherein the seams are completely thermosealed.

The inner surface of the container, as made of thermoplastic sheet, is designated at 1, whereas at 2 there is designated the outer surface of said container which is made of another material, such as paper.

The longitudinal weld line (FIG. 2) is designated at 3. Welding is accomplished on borders initially laterally projecting, whereupon the weld zone, suitably bent as shown in FIG. 2, is attached to the outer underlying surface 2, namely being adhered by a suitable adhesive shown at 4.

Thereby, a greater resistance is achieved to the stress condition due to pressure generated within the container.

Thus, it will be appreciated that stresses are tangentially transmitted and involve a substantial surface section. Therefore, the container can better endure the strain it is subjected to.

According to the present invention, the container is also provided with a one-way valve means for preventing the external air from entering said container.

With the present invention the container which is formed by the flexible sheet material 1, 2, is capable of being sealed, and the flexible sheet material is formed with an opening, shown in FIG. 3, where the one-way valve means is situated. This oneway valve means includes the base member 5 which is fluid tightly fixed with the flexible sheet material and which is formed with the valve opening 6 which registers with the opening in the sheet material. The rubber disc 7 forms a yieldable means which normally assumes the position illustrated in FIG. 3 engaging the surface of base member 5 which is directed away from the interior of the container and closing the opening 6 with a peripheral region of the disc 7 extending beyond the opening 6. The one-way valve means further includes the hollow member 8 which is fixed with the base member 5 and which defines therewith an inner chamber which accommodates the yieldable means 7. This hollow member 8 has the interior projection 9 engaging the yieldable means 7 for holding the latter against the base member 5 extending across the valve opening 6. The hollow space within the hollow member 8 communicates with a discharge opening 10 formed in the member 8 and communicating with the outer atmosphere, so that in response to an excess of interior pressure over exterior pressure, the yieldable means 7 will provide communication between the valve opening 6 and the hollow interior chamber of the hollow member 8, so that excess pressure will result in. sufficient communication between the interior of the container and the outer atmosphere to relieve the excess pressure.

The above-described valve is welded on the thermoweldable portion 1 of the container, the borders 11 of which are shown in FIG. 3.

Practically, in order to apply said valve to the container, an opening is drilled in the container so as to slip in the valve, which is then welded to the container.

The system substantially operated as follows:

The container provided with the valve is filled, for example, with coffee and following evacuation is then sealed.

Therefore, rubber disc 7 is biased by an external pressure (that is, a pressure directed from outside to inside of the container) and then presses against base member 5 about opening 6; thus, some vacuum degree is observed within the container and hence at the surface of disc 7 adjacent opening 6 there is a veryslight pressure and, however, considerably less than the external pressure which via discharge opening 10 is exerted on the opposite surface of said disc.

Thus, the rubber disc 7 as pressed on base member 5 will prevent air from entering the container, or the passage of air The pressure so acting against disc 7 is resisted by resilient rubber reaction and projection 9 of hollow member 8 pressing on said disc.

When the force pressing from the inside of the container on said disc exceeds a predetermined limit, the peripheral portion of the disc will automatically lift allowing the outlet of the gas which so reaches the external space S through the small discharge opening 10; the gas outlet automatically causes a pressure reduction within the bag or bellows, and therefore disc 7 recloses the passage and prevents air from entering from the outside.

Thus, coffee remains within its environment out of air contact and is so preserved under the best conditions.

Said pressure limit causing the gas outlet can be adjusted by varying the following factors:

1. The thickness of rubber disc 7 (whereby the resilient reaction thereof will vary).

2. The initial pressure provided by projection 9 of hollow member 8.

3. The diameter of said projection.

4. The diameter of opening 6.

What I claim is:

l. A container comprising a flexible sheet material capable of being sealed for closing off the interior of the container from the outer atmosphere, and a one-way valve means carried by said flexible sheet material for preventing outside air from flowing into the container, said one-way valve means including a base member carried by said sheet material, having a surface directed away from the interior of said container, and formed with a valve opening, yieldable means engaging said surface of said base member, extending across said valve opening, and normally assuming a position engaging the latter surface for maintaining said one-way valve means closed, said valve means further including a hollow member fixed to said surface of said base member and defining therewith an inner chamber in which said yieldable means is located, said hollow member being formed with a discharge opening through which said chamber communicates with the outer atmosphere, and said yieldable means responding to an excess of pressure in the interior of said container over the outer atmospheric pressure by yielding to place said valve opening in communication with'said chamber until said excess pressure in theinterior of said container diminishes to a value where said yieldable means again assumes said position closing said valve opening.

2. The combination of claim 1 and wherein said hollow member of said valve means has an inner projection holding said yieldable means against said surface of said base member.

3. The combination of claim 1 and wherein said sheet material is formed with an opening with which said valve opening registers.

4. The combination of claim 3 and wherein said sheet material includes a thermoplastic sheet portion and said base member being made of a plastic and being welded to said sheet portion in a fluidtight manner.

5. The combination of claim 4 and wherein said thermoplastic sheet portion defines part of the interior of said container, and has an inner surface directed toward the interior of said container, said base member being welded to said thermoplastic sheet portion at said surface thereof in the interior of said container.

6. The combination of claim 1 and wherein said yieldable means is in the form of a flexible disc, said hollow member having an inner projection holding said disc against said inner surface of said base member, and said disc having a peripheral portion extending beyond said projection to be deflected by the excess pressure in the interior of said container when said yieldable means responds to place said valve opening in communication with said chamber.

7. The combination of claim 6 and wherein said chamber surrounds said projection and said disc has a periphery extending beyond said valve opening and beyond said projection.

8. The combination of claim 7 and wherein said disc is made of rubber and is elastic.

9. The combination of claim 7 and wherein said valve opening is situated centrally of said base member and said projection and disc are both coaxially aligned with said valve opening.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2138376 *Sep 2, 1937Nov 29, 1938Owens Illinois Pacific Coast CClosure
US2724543 *Feb 27, 1952Nov 22, 1955Bauer Charles ABag seal
US2738091 *Jan 11, 1954Mar 13, 1956Mattox Robert GBottle cap
US2822961 *Jun 25, 1954Feb 11, 1958Seaquist Nels WAerosol bomb
US3081919 *Apr 3, 1959Mar 19, 1963Gulf Research Development CoCombination dispensing and excess pressure relief valve
US3191807 *Nov 13, 1961Jun 29, 1965Microchemical Specialties CoDispenser adapted for ultra-micro range
US3197119 *Jul 2, 1963Jul 27, 1965Bemis Bro Bag CoBags
US3302859 *Dec 21, 1964Feb 7, 1967Bemis Co IncBag
US3371849 *Aug 19, 1965Mar 5, 1968Windmoeller & HoelscherValved bag of plastic material sheeting
US3374805 *Aug 16, 1965Mar 26, 1968Kelsey Hayes CoPressure relief valve
US3430842 *Sep 22, 1967Mar 4, 1969Yamaguchi GennosukeValved bag
US3432087 *Aug 17, 1967Mar 11, 1969Costello Alfred PPackage valve
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3833166 *Jan 24, 1973Sep 3, 1974Canadian IndValve bag
US3886937 *May 7, 1973Jun 3, 1975American Hospital Supply CorpMedical administration set for dispensing plural medical liquids
US3949934 *May 24, 1974Apr 13, 1976Luigi GoglioContainer having a valve movable between one-way flow and closed positions
US4000846 *Jun 30, 1975Jan 4, 1977Dunkin' Donuts IncorporatedPressure relief valve and bag incorporating same
US4420015 *Dec 30, 1981Dec 13, 1983Sig-Schweizerische Industrie-GesellschaftInstallation of an excess pressure valve in a hermetically sealed flexible container
US4444219 *Jun 29, 1982Apr 24, 1984Wipf Ag VerpackungenOverpressure valve for packages with flexible walls
US4834554 *Nov 16, 1987May 30, 1989J. C. Brock Corp.Plastic bag with integral venting structure
US4871093 *Nov 28, 1984Oct 3, 1989Esther BurshtainContainer for dispensing a material
US4890637 *Jan 19, 1989Jan 2, 1990Flavorcoffee Co. Inc.One way valve
US5121840 *Sep 26, 1990Jun 16, 1992Henk SchramInflatable body with a valve
US5515994 *Jun 16, 1994May 14, 1996Goglio; LuigiDegassing valve for aromatic products, such as coffee and similar products
US5558441 *Dec 12, 1994Sep 24, 1996Morrison; Kenneth V.Receptacle
US5578005 *Sep 16, 1994Nov 26, 1996River Medical, Inc.Apparatus and methods for multiple fluid infusion
US5584409 *Sep 18, 1995Dec 17, 1996Chemberlen; Christopher H.One direction ventilation valves
US5588556 *Jun 5, 1995Dec 31, 1996River Medical, Inc.Method for generating gas to deliver liquid from a container
US5700245 *Jul 13, 1995Dec 23, 1997Winfield MedicalApparatus for the generation of gas pressure for controlled fluid delivery
US5887755 *Jul 21, 1997Mar 30, 1999Quantic Biomedical PartnersWound sealant preparation and application device and method
US5893461 *Apr 7, 1997Apr 13, 1999Fres-Co System Usa, Inc.Pressure vacuum release hermetic valve for flexible packages
US5992635 *Aug 14, 1998Nov 30, 1999Fres-Co System Usa, Inc.Pressure vacuum release hermetic valve for flexible packages
US6056439 *Jan 28, 1999May 2, 2000Fres-Co System Usa, Inc.High flow/volume valve for flexible packaging
US6070728 *Feb 2, 1999Jun 6, 2000Fres-Co System Usa, Inc.Filter bag with valve
US6213645Mar 14, 2000Apr 10, 2001Fres-Co System Usa, Inc.Flexible package with sealed edges and easy to open mouth
US6274181 *Jan 31, 2000Aug 14, 2001Kapak CorporationFlexible bags, bag arrangements or pouches that include a gas vent or gas filter arrangement; foods
US6423356Jun 19, 2001Jul 23, 2002Kapak CorporationVented pouch arrangement and method
US6539691Mar 14, 2001Apr 1, 2003Fres-Co System Usa, Inc.Flexible package with sealed edges and easy to open mouth
US6776301Feb 7, 2002Aug 17, 2004Sonoco Development, Inc.Cap with one-way de-gas feature
US7022058Feb 21, 2002Apr 4, 2006Tilia International, Inc.Method for preparing air channel-equipped film for use in vacuum package
US7087130Mar 4, 2004Aug 8, 2006Tilia International, Inc.Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging
US7138025Mar 4, 2004Nov 21, 2006Tilia International, Inc.Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging
US7178550 *Aug 14, 2002Feb 20, 2007Robert Bosch GmbhPressure control valve for a packaging container and device for attaching the pressure control valve to a material web
US7220053Dec 14, 2004May 22, 2007Sunbeam Products, Inc.Flexible composite bag for vacuum sealing
US7294354Oct 29, 2004Nov 13, 2007Sonoco Development, Inc.Removable closure affixed to the upper edge in a substantially gas-tight manner, and a gas release valve in a wall of the container body and operable to release gas from the container when the pressure differential between the interior and the exterior of the container is sufficient to open the valve
US7517484Mar 15, 2004Apr 14, 2009Sunbeam Products, Inc.Forming evacuation channels during single and multi-layer extrusion process
US7534039Jul 19, 2005May 19, 2009Sunbeam Products, Inc.Vacuum packaging films patterned with protruding cavernous structures
US7596931Nov 12, 2007Oct 6, 2009Sonoco Development, Inc.Container with gas release feature
US7625459Jun 30, 2006Dec 1, 2009Sunbeam Products, Inc.Method for manufacturing liquid-trapping bag for use in vacuum packaging
US7784160Jun 15, 2007Aug 31, 2010S.C. Johnson & Son, Inc.Pouch and airtight resealable closure mechanism therefor
US7789563 *Jul 14, 2004Sep 7, 2010Ad Japan CorporationValve gear
US7857515Jun 15, 2007Dec 28, 2010S.C. Johnson Home Storage, Inc.Airtight closure mechanism for a reclosable pouch
US7874731Jun 15, 2007Jan 25, 2011S.C. Johnson Home Storage, Inc.Valve for a recloseable container
US7886412Mar 16, 2007Feb 15, 2011S.C. Johnson Home Storage, Inc.Pouch and airtight resealable closure mechanism therefor
US7887238Jun 15, 2007Feb 15, 2011S.C. Johnson Home Storage, Inc.Flow channels for a pouch
US7938144 *Jan 9, 2007May 10, 2011Adobe Systems IncorporatedRefueling valve for a fuel storage system and method therefor
US7946766Jun 15, 2007May 24, 2011S.C. Johnson & Son, Inc.Offset closure mechanism for a reclosable pouch
US7967509Jun 15, 2007Jun 28, 2011S.C. Johnson & Son, Inc.Pouch with a valve
US8066433Mar 14, 2008Nov 29, 2011Pro-Mart Industries, Inc.Valve for vacuum storage bag
US8176604Jul 23, 2010May 15, 2012S.C. Johnson & Son, Inc.Pouch and airtight resealable closure mechanism therefor
US8231273Dec 17, 2010Jul 31, 2012S.C. Johnson & Son, Inc.Flow channel profile and a complementary groove for a pouch
US8434633Jan 28, 2009May 7, 2013Fres-Co System Usa, Inc.One-way valve for flexible package and package including a one-way valve
US8636034Oct 9, 2012Jan 28, 2014Plitek, L.L.C.Oil-less and wetted pressure relief valves having an integrated filter
US8783292Aug 31, 2011Jul 22, 2014Plitek, L.L.C.Oil-less pressure relief valves
US8827097Jan 11, 2011Sep 9, 2014Sonoco Development, Inc.Overcap for a container
US8827556Dec 16, 2010Sep 9, 2014S.C. Johnson & Son, Inc.Pouch and airtight resealable closure mechanism therefor
US20120141637 *Dec 7, 2010Jun 7, 2012Mooney Kristin AnnMultiple Compartment Coffee Packaging System
DE2213908A1 *Mar 22, 1972Oct 5, 1972 Title not available
EP0870697A1 *Apr 7, 1998Oct 14, 1998Fres-Co System Usa, Inc.Hermetically sealed package provided with a vacuum relief valve
EP1538107A2 *Nov 3, 2004Jun 8, 2005P.L.V. SpaOne-way degassing valve for airtight containers
EP2345598A1Jan 5, 2011Jul 20, 2011Sonoco Development, Inc.Overcap for a container
EP2354032A1Jan 29, 2010Aug 10, 2011Goglio S.p.A.Biodegradable one-way venting valve for an airtight container
WO2010088107A1Jan 20, 2010Aug 5, 2010Fres-Co System Usa, Inc.One-way valve for flexible package, method of making the same and package including a one-way valve
WO2011091924A1Dec 22, 2010Aug 4, 2011Goglio S.P.A.Biodegradable one-way venting valve for an airtight container
U.S. Classification383/103, 383/107, 137/843, 222/494, 137/852, 222/396, 220/203.16
International ClassificationB65D81/20, B65D77/22
Cooperative ClassificationB65D77/225, B65D81/20
European ClassificationB65D77/22D, B65D81/20