|Publication number||US2361344 A|
|Publication date||Oct 24, 1944|
|Filing date||Oct 10, 1941|
|Priority date||Oct 10, 1941|
|Publication number||US 2361344 A, US 2361344A, US-A-2361344, US2361344 A, US2361344A|
|Original Assignee||Pneumatic Scale Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (46), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
J. YATES VENTED PACKAGE Oct. 24, 1944.
Filed ed. 10, 1941 dmvlzmc; BY 2 Z ATTORNEY Patented Oct. 24, 1944 UNITED sTATEs PATENT OFFICE VENTED PACKAGE John Yates, Quincy, Mass, assignor to Pneumatic Scale Corporation, Limited, Quincy, Mass., a corporation of Massachusetts Application October 10, 1941, Serial No. 414,461 7 Claims. (01; 99452) producing the package hereinafter described and particularly defined in the claims at the end of this specification.
In the drawing illustrating the preferred embodiment of the invention, Fig. 1 is a perspective view of a package embodying thepresent invention; Fig. 2 is a developed view of a doubled over or once folded blank preferably used in producing the present container; Figs. 3 and 4 are en larged cross-sectional views taken on the lines 33 and 4 -4 respectively of Fig. 1; and Fig. 5 is a perspective view of a modified form of the present invention.
Experience has shown that in the packaging of freshly roasted coffee carbon dioxide gas is gradually liberated within the container for a substantial period of time after the coffee has been packaged. When freshly roasted coffee has been packaged in bags of material impervious to air and the bags sealed the internal-pressure within the sealed bag has oftentimes risen to the point where rupture of the bag and particularly of the sealed seams thereof has occurred. Because of the desirability of preventing the exposure of the coffee to the atmosphere a hermetically sealed container of air impervious material is required sothat the problem of preventing rupture ofthe container is one which has heretofore been the subject of much thought and study.
- At the present time various heat sealable and air impervious materials are available including the rubber-like product commercially sold as Pliofilm." In accordance with the present invention the container for producing the present package-may and preferabl will be formed of a sheet of heat sealable and air impervious material, such as a sheet of Pliofilm.
be packaged. Thereafter the top of the bag may 'be heat sealed to hermetically seal the cofiec within the container.
Preferably the sheet is folded and heat sealed along the- I in contact.
In order to provide a structure of container in which theinternal gas pressure may be controlled and' maintained below an amount sumcient to cause the bag or the heat sealed seams to burst, one of the heat sealed seams of the bag' is provided with an elongated unsealed portion communicating with the exterior and interior of the bag and forming in effect a vent. This vent is normally closed by the natural resiliency of the bag forming material which operates to maintain the surfaces forming the walls of the vent, When, however, the internal gas pressure begins to rise and reaches a point sufficient to force apart the normally contacting walls of the vent, then the gas is permitted to escape to the atmosphere, lowering the internal gas pressure to a point slightly above atmospheric pressure,.so that in the package embodying the present invention a slight differential in pres-- sure exists between the interior and exterior of the package at alltimes and this, together with the fact that the Walls of the opening comprising the vent, are naturally held in contact by the inherent resiliency of the material, serves to prevent the entrance of air through the vent into the interior of the package, so that in effect all of the advantages of a hermetically sealed package are obtained while the difiiculty which has heretofore been experienced because of the development of excessive internal gas pressure within the package is avoided in a simple, practical and inexpensive manner.
Referring now to the drawing, the container herein illustrated comprises a bag Ill preferably produced from a blank l2 of flexible sheet material impervious to air and also capable of being sealed preferably by'heat and pressure. In producing the illustrated bag, the blank is first folded once upon itself so that the folded edge l4 forms one of the closed sides of the flat bag. Then the opposite side and the bottom of the flat bag are heat sealed by the application of heat and presure to form the bottom and side seams and bottom seams produced by heat sealing, as
In order to form a vent for the package, it is preferred that during the sealing of the side seam It, as shown 2, a portion thereof be leftprovision of cut-out portions in the usual heat sealingand pressing members used to form the seam It. The portion of the seam conforming to the outline of the cut-out members will remain unsealed,'providing an elongated narrow vent communicating with the interior and also the exterior of the package. Because of the na-' tural resiliency of the bag forming material and of the fact that the vent,is elongated and relatively narrow, the walls of the vent remain in contact to be subsequently forced open when a substantial increase in internal gas pressure occurs withinthe package, and when such excess of pressure has been relieved then the walls of the prevent'the introduction of air into the package. In practice the container after having beenformed in the manner shown in Fig. 2 so as to provide a sealed seam Is at the bottom and a v sealed seam It at one side, may then be filled with the commodities such as'cofiee, and if desired prior to filling the bag may be caused to assume a shape rectangular in section in "accordance withthe usual practice and the top seam of the bag sealed in any usual or-preferred manner to hermetically seat the coffee within the container. As illustrated in Fig. 1, an elongated heat sealed I seam 30 is provided and folded down upon the g top or the container and the triangular end tabs 32, 34 may then be folded inwardly on top ofthe A top of the container, as shown in Fig. 1. The bottom seam It may be similarly folded and the sideseam I8 folded upon the side of the container; V
As a modification of the package and container shown in-Flgs. 1 and 2, the structure'illustrated in Fig. may be used wherein the vent 2| is formed in the heat sealed top seam 3|.
From the description thus far, and by reference to the drawing, it will be observed that when the coflee or other gas liberating material is packaged in the manner described and in a container embodying the vent 20, then as the gas pressure develops within the package a point is reached where the'diii'erential pressure between .the interior and exterior of the package is suflicient to force apart the normally contacting walls of the vent 20, permitting escape of a sumcient amount of the gas or air within the package to reduce the internal pressure to a point where it is slightly in excess of atmospheric pressure and where the walls of the vent 20 are again permitted to come in contact. The elongated formation of the vent 20 assists in insuring the continued maintenance all of the advantages of a hermetically sealed package are obtained while the difilculty which heretofore has been experienced because of the tendency of packages of this character to burst by reason of excessive internal gas pressure is eliminated. At the same time the structure of ing operations which may be performed upon the 'usual automatic packaging machine.
Whilethe preferred embodiments of the invention have been herein illustrated and described,
5 it will be understood that the invention may be embodied in other forms within the scope of the following claims.
' Having thus described the invention, what is claimed is:
1. A package comprising a hermetically sealed bag or air impervious resilient material containing a commodity having gas liberating characteristics, said bag being provided with an elongated narrow vent opening formed therein communicating with the interior and with the exterior of the bag for automatically maintaining the gas pressure within the bag slightly above atmospheric pressure..the-length oi. said vent being many times its width whereby to enable the inherent resiliency or the walls of the vent to close the vent until the interior gas pressure substantially exceeds the external pressure.
2. A package comprising a hermetically scale bag of air impervious resilient material contain- 5 ing a commodity having gas liberating characteristics, said bag having marginal sealed seams and an elongated narrow vent opening formed between the components of one of said seams communicating with the interiorand exterior of the bag for automatically maintaining the gas pressure withinthe bag slightly above atmospheric pressure, the length of said vent being many times its width whereby to enable the inherent resiliency of the walls of the vent to close 35 the vent until the interior gas pressure substantially exceeds the external pressure.
- 3. A package comprising a hermetically sealed bag of. air impervious resilient material containing a commodity having gas liberating characteristics, said bag having outwardly projecting marginal sealed seams and an elongated narrow vent opening formed between the components of one or said seams communicating with the interior and exterior of the bag for automatically 5 maintaining the gas pressure within the bag slightly above atmospheric pressure, the length of said vent being manytimes its width whereby to enable the inherent resiliency of the walls of the vent to close the vent until the interior gas 50 pressure substantially exceeds the external pressure.
4. A package comprising a hermetically sealed with outwardly projecting heat sealedseams and an elongated vent opening formed between the components of one of the seams, said opening communicating with the interior and exterior oi the bag and automatically maintaining the gas pressure within the bag slightly above atmospheric pressure, the length of said vent being many times-its width whereby to enable the inherent resiliency of the walls of the vent to close the vent until the interior gas pressure substantially exceeds the external pressure.
5. A package comprising a hermetically sealed bag of air impervious resilientmaterial containing a commodity having gas liberating characteristics, said bag beingprovided with a top seam and an elongated narrow vent opening formed therein, said opening communicating with the interior and'exterior of the bag for maintaining the gas pressure'within the bag slightly above atmosphericpressure, the length of said vent being many times its width whereby to enable the inherent resiliency of the 'walls of the vent to close the vent until the interior gas pressure substantially exceeds the external pressure.
6. A package comprising a hermetically sealed bag of air impervious resilient material containing a commodity havinggas liberating characteristics, said bag having outwardly projecting marginal sealed seams and an elongated narrow vent opening formed in one of asid seams'comprising an unsealed portion between the contiguous face of said one seam, said vent communicating with the interior and exterior of the bag for automatically maintaining the gas pressure within the bag slightly above atmospheric pressure, the length of said vent being many times its width whereby to enable the resiliency of the walls of the vent to close the same until the interior gas pressure substantially exceeds the external pressure.
7. A package for cofl'ee comprising a hermeti-- cally sealed bag of heat sealable, sheet rubber vent being many times its width whereby to enable the resiliency ofthe walls of the vent to close the same until the interior gas pressure substantially exceeds the external pressure.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2595708 *||Sep 1, 1948||May 6, 1952||Ivers Lee Co||Vented package|
|US2627341 *||Aug 19, 1949||Feb 3, 1953||Johnson & Johnson||Aseptic package with steam permeable seal|
|US2633284 *||Mar 28, 1949||Mar 31, 1953||Mcfarland John C||Sealed cooking container for comestibles|
|US2637481 *||Jul 5, 1949||May 5, 1953||Adams Sr Carl||Display carton for fruits and vegetables|
|US2708028 *||Jan 28, 1953||May 10, 1955||See Qual Package Corp||Fruit container|
|US2927722 *||Nov 10, 1954||Mar 8, 1960||Metzger Melvin R||Vacuum type valve-equipped containers|
|US3077409 *||Jul 2, 1958||Feb 12, 1963||American Can Co||Coffee package|
|US3108881 *||Mar 5, 1959||Oct 29, 1963||Continental Can Co||Method of packaging food|
|US3133691 *||Oct 30, 1962||May 19, 1964||Nat Distillers Chem Corp||Vent for thermoplastic bag|
|US3237844 *||Sep 28, 1964||Mar 1, 1966||Ici Ltd||Bag closure|
|US3309006 *||Feb 16, 1966||Mar 14, 1967||Bemis Co Inc||Plastic bags|
|US3311287 *||Feb 21, 1966||Mar 28, 1967||Continental Can Co||Flexible container for microwave sterilization of foodstuffs therein|
|US3323442 *||Sep 14, 1965||Jun 6, 1967||Sandt Rader Fred||Aluminum foil roasting bag|
|US3637132 *||Jan 9, 1970||Jan 25, 1972||Oscar S Gray||Pressure release package or container|
|US3937396 *||Jan 18, 1974||Feb 10, 1976||Schneider William S||Valve for vented package|
|US4134535 *||Feb 10, 1978||Jan 16, 1979||Hag Aktiengesellschaft||Pressure relief valve for packing containers|
|US4141487 *||Mar 29, 1977||Feb 27, 1979||Union Carbide Corporation||Disposable food package|
|US4206870 *||Dec 8, 1978||Jun 10, 1980||Quad Corporation||Pressure relief valve|
|US4252268 *||Aug 24, 1979||Feb 24, 1981||Maryland Cup Corporation||Lid for ovenable trays and resulting combined container|
|US4284228 *||Jun 14, 1979||Aug 18, 1981||Tetra Pak International Ab||Packing containers of laminated material having venting means|
|US4296862 *||Aug 27, 1979||Oct 27, 1981||Armentrout James L||Devious path bacterial barrier|
|US4804137 *||Dec 11, 1987||Feb 14, 1989||Harby Colin F||Food container|
|US4874620 *||Sep 15, 1988||Oct 17, 1989||Packaging Concepts, Inc.||Microwavable package incorporating controlled venting|
|US4892744 *||Jan 23, 1989||Jan 9, 1990||Borden, Inc.||Single-pleated microwave popcorn package|
|US4927648 *||Oct 27, 1989||May 22, 1990||Borden, Inc.||Method of preparing popcorn|
|US4942050 *||Oct 27, 1989||Jul 17, 1990||Ylvisaker Jon A||Process for forming a microwave popcorn package|
|US5419638 *||May 6, 1993||May 30, 1995||Jamison; Mark D.||Pressure sensitive gas valve for flexible pouch|
|US5587192 *||Sep 29, 1994||Dec 24, 1996||Societe De Constructions De Material Metallique||Ventable container|
|US5989613 *||Jan 13, 1997||Nov 23, 1999||Freshpak, Inc.||Gas packaging method for perishable food products|
|US5992442 *||May 29, 1997||Nov 30, 1999||Urquhart; Edward F.||Relief valve for use with hermetically sealed flexible container|
|US6149304 *||May 9, 1997||Nov 21, 2000||The Procter & Gamble Company||Flexible storage bag with selectively-activatible closure|
|US6170985 *||Oct 15, 1998||Jan 9, 2001||Lyle F. Shabram, Jr.||Bag with venting means|
|US6231236||Jul 12, 1999||May 15, 2001||Reynolds Consumer Products, Inc.||Resealable package having venting structure and methods|
|US6302324||Aug 25, 1999||Oct 16, 2001||Freshpak Development Llc||Tray-type receptacle for use in a packaging method for perishable food products|
|US6481185||Oct 27, 2000||Nov 19, 2002||Raymond G. Buchko||System for modifying the atmosphere within the interior of a package|
|US7294354||Oct 29, 2004||Nov 13, 2007||Sonoco Development, Inc.||Container with gas release feature|
|US7437805||Jun 23, 2006||Oct 21, 2008||Edward Alan Berich||Reclosable storage bag closure with internal valving|
|US7596931||Nov 12, 2007||Oct 6, 2009||Sonoco Development, Inc.||Container with gas release feature|
|US8176602 *||May 24, 2011||May 15, 2012||Edward Alan Berich||Reclosable storage bag closure with internal valving|
|US20040057636 *||Sep 4, 2002||Mar 25, 2004||Akira Ishizaki||Compactor bag with a check valve|
|US20040062840 *||Sep 29, 2003||Apr 1, 2004||Jamison Mark D.||Pressure relief valve for food product packages|
|US20060045392 *||Aug 15, 2005||Mar 2, 2006||Roger Bannister||Transversely sealed container|
|US20060092451 *||Oct 28, 2004||May 4, 2006||Kabushiki Kaisha Toshiba||Printing control system|
|US20080060321 *||Nov 12, 2007||Mar 13, 2008||Sonoco Development, Inc.||Container with gas release feature|
|DE1099931B *||May 30, 1958||Feb 16, 1961||Habra Werk Ott Kg||Spritzbehaelter fuer fluessige oder halbfluessige Stoffe, bestehend aus einem heissversiegelten Klotzbodenbeutel|
|EP2868594A1 *||Oct 30, 2013||May 6, 2015||Mondi Halle GmbH||Plastic tissue composite bag|
|U.S. Classification||426/118, 493/189, 383/100, 493/213, 206/813, 206/525|
|Cooperative Classification||B65D75/52, Y10S206/813, B65D2205/00|