Патент USA US2122968код для вставки
July 5, 1938. H. E. TOWNSEND Filed Oct. 23, 1933 /|%/v/|% 7AA . %. 2,122,968 Patented July 5, 1938 2,122,968 '2 ‘UNITED STATES ‘PATENT: OFFICE 2.12am ~ nsm'ncmr sump comma Harry E. Townsend, Brooklyn, N. Y.; ‘Title Guar ante and Trust Company executor of the el tateofsaidHarryE, Townsend, deceased Application October 2:, 1933, ‘Serial No. 694,831 1 Claim. (01. 215-40) ‘My invention relates to hermetically sealed Jected to sterilizing or heat, the extent to which the closure may be so lifted being One of the objects of my invention is to pro ‘somewhat exaggerated, as shown; vide a container and closure of such construc Fig. 5 is a sectional view similar to Fig. 3 show ‘tion‘that food to be preserved can be placed in ing an implement in position to remove the clo- .5 sure from the container; the container in an uncooked or unsterile con dition, the closure hermetically sealed on the Fig. 6 is a sectional view, taken on the line container with‘ or without vacuum, and the sealed 6-6 of Fig. ‘3; and. '. . _ package subjected to cooking or sterilizing heat Fig. 7 is a view similar to Fig. 3 of a modi 10 without danger of impairing’ the hermetic seal i‘ication of the invention. v 10 or subjecting the package to excessive internal The preferred embodiment of‘ my invention pressure. illustrated in Figs. 1 to 6, inclusive, of the draw ‘ Another object is to provide a container of the ing, comprises a glass jar 2, a sheet metal cap 4 and an elastic ‘gasket 6. . character indicated which is so constructed that 15 during the sterilizing or cooking operation, when The jar is provided with a cylindrical mouth 15 excessive pressure is generated within the her portion. 8 of considerable depth, and is further metically sealed package, the hermetic seal is provided, at the bottom of the cylindrical por momentarily broken to relieve the pressure and tion, with a narrow horizontal shoulder II and ‘ containers. ‘20 ' the package immediately re-sealed automatically. a downwardly and outwardly sloping annular Another object is to provide a construction in a container and closure ‘to be used in the indi cated manner, whereby the closure may be sealed shoulder or face I2. ‘ on the container without a vacuum, the sealed , . 20 The gasket 6, which is preferably rectangular in cross-section, is positioned over the mouth portion 8 of the jar and upon the horizontal package subjected to sterilizing or cooking heat, , shoulder ID. The gasket is made slightly smaller 25 and upon the cooling of the package, a vacuum in ‘diameter than. the cylindrical mouth portion 25 , or partial vacuum created therein. so as to cause‘ it to tend to hug the mouth por ‘ Another object is to provide a package of the indicated type in which a liquid or semi-liquid content may be maintained for a predetermined tion when placed thereon. The cap 4 is provided with a ?at top portion I4, and a skirt having a crown portion E8, an boil and without causing the pressure in the outwardly extending portion i8 and preferably 30 with a downwardly extending portion 20, ter minating in the curled over portion 22. The package to rise above a predetermined degree. closure can be sealed on the container by pass ‘30 time at a temperature corresponding with its boiling point, without causing ‘the contents to ing it over the cylindrical mouth portion 8 of a novel and improved package of this character ‘ the container and pressing it down on the gasket .35 in which the closure may be easily removed and seated on the shoulder l0. ’ replaced on the container with or without the ‘ ‘ Except as hereinafter described, the parts gasket, the closure when replaced being held by above referred to may be the same as parts of the ' frictional engagement with the container. device illustrated, described and claimed in my 40 I attain these and other objects by means of U. 5.. Patent No. 2,099,710, issued November‘23, -40 ' , Another object of the invention is to provide the construction illustrated in the-accompanying ‘drawing in which:— t n Figure 1 is a side elevation of a container and closure embodying my invention with ‘the 45 closure shown partly in section; Fig. 2 is a detail sectional view on an enlarged scale, taken on the line 2--2 Fig. l, but showing the closure in the position it may assume at the beginning of the gasket ‘compressing operation; '50 ‘1937. . One of the principal features of the present in vention is the provision of means whereby the closure is yieldably held sealed on the container independently of atmospheric pressure, and, in 45 case excessive pressure is generated within the > sealed package, the seal is momentarily broken to relieve the pressure and the package instantly , and hermetically re-sealed. Fig. 3 is a view similar to Fig. 2 but showing As shown, the cylindrical mouth portion I of :50 the container is provided with avplurality of the closure sealed on the container; Fig. 4 is a view similar to Fig. 3 but showing projections or nubs 24, which project outwardly the closure as it may be momentarily lifted to ‘ a distance slightly less than the distance be relieve excessive internal pressure that may be tween the cylindrical mouth portion and‘ the 55 generated while the sealed package is being sub crown it of the closure. These projections are 55 aisaoes 2 a package subjected to this process'are abso ' preferably curved circumfeientiaily of the jar, asshowninll'lg.o,andfromapoint near their lutely sterile. tops are tapered downwardly and inwardly so It will be apparent thatthe sise, spacing and inclination of the projections and the diameter that these parts of the projections form portions of inverted cones, the upper portions of the pro In the crown ll of the closure there is formed of the tension bead of the closure may be varied to meet different conditions. With the use of jars or tumblers having their mouth portions ap proximately two and one-half inches in‘ diameter, an- inwardly‘ projecting annular head or groove satisfactory results have been secured with the jections, being beveled toward the edgeof the mouth portion. ' - - - II, the inner diameter. of which is slightly vgreat- .use of six projections on the jar which are of 10 er than the cylindrical mouth portion I of the container, but less than the diameter of a circle short radius in cross section and are otherwise proportioned as shown in the drawing, the bead bounding the most outwardly lying portions of on the cap being of proper diameter and the re the projections 24. siliency of the material of the cap being such as to obtain the required tension when the cap is 15 ' ‘ ' when the closure is forced down over the mouth of the container, the annular; head is “ applied. distorted from a true circle as it passes over the most outwardly extending portions of the projec ‘tions 24, and, although this distortion becomes 20 less as the closure is pushed down to scaling p0; sitlon, it is still present to some degree as shown in Fig. 6. The constricting influence or tension . of the distorted bead, as it bears on theidown wardly and‘ inwardly tapering‘ surfaces'of the projections, readily urges the closure in the downward. direction with ‘su?icient force to com press the gasket and seal the closure on the con '30 tainer independently of atmospheric pressure. This construction provides the advantage that the container can be filled with an uncooked or' unsterilized product, the closure sealed on the container with or without a vacuum, and the sealed package subjected to cooking or ‘sterilizing When it is desired to remove the closure from the container this may be easily done by inserting a pointed implementlbetween the lower edge of . the skirt of the closure and the downwardly sloping surface I! of the container sov that its point is in position to rest on the horizontal shoulder ID, as shown in Fig. 5. In this position the point of the implement is a considerable dis tance above the lower edge of the skirt of the closure and some distance inwardly therefrom which gives suiilcient‘ leverage so that a single upward movement'of the tool will pry the clo sure entirely free of the container. When it is desired to provide a closure that 30 can be used in the indicated manner and that is at the same time adapted'to be re-sealed on the container without the gasket, the closure may be made as illustrated in Fig. '7. In this case, the heat for any desired length of time without dan 35 ger of displacing the closure or subjecting the‘ ‘inside diameter of the crown of the closure is 35 package to excessive internal pressure. When made slightly less than the greatest diameter of the closure is initially sealed on the container without a vacuum the head space of the package is, of course, filled with air, and it is very de 40 sirable that as much as possible of this air be expelled from the package, not only that the re sulting vacuum may aid in holding the closure securely sealed on the container, but because the oxygen of the air is harmful to many food prod ucts. It may also be desirable in some cases to maintain the contents of the package at a tem perature corresponding with their boiling point ' but without permitting boiling to occur. If the contents are allowed to boil and, therefore, to 50 vaporize, some of the vapor will be forced‘ out of the package, in consequence of which, the pack age willlose-weight. - With the construction described it is possible to expel the air from a package that has been 55 sealed without a vacuum and then to maintain the contents at. a temperature corresponding with their boiling point without causing the con tents to boil. This is so, because, as the tempera ture of the package increases, the air in the head spaces expands and the closure is lifted (Fig. 4) su?lciently to permit a portion of the air to escape, whereupon the constantly present con stricting in?uence of the head‘ 26 on the projec tions 24 again instantly urges the closure to re 65 scaling position. When enoughrof the air has escaped so that what remains has not enough ex pansive force to lift the closure, the slight pres sure it exerts upon the surface of the liquid con tents of the package is su?lcient to prevent the 70 contents from boiling even though they may be at boiling temperature. The package remains hermetically sealed at the end of the cooking or sterilizing operation and no further attention to the seal is necessary. 0! course, the contents of the projections 24. When the closure is so made, the frictional engagement of the projections 24 with the crown of the closure is not su?icient to prevent the tension bead 26 from forcing the 40 closure down into sealing engagement with the gasket. _ As will be evident to those skilled in the art, ‘my invention permits various modi?cations with out departing from the spirit thereof or the scope of the appended claim. What I claim is: The combination of a container having 9. cy lindrical mouth portion and a gasket seating shoulder positioned a distance below the top of 50 said cylindrical portion, an elastic gasket seated on said shoulder, and a closure of resilient ma terial having a cylindrical crown portion adapted to fit over said cylindrical mouth portion and a portion below said cylindrical crown portion adapted to compress said gasket on said shoulder, said cylindrical mouth portion of the container being provided with a plurality of spaced projec tions having the lower portions of their outer faces tapering downwardly and inwardly, and 60 said cylindrical crown portion of the closure be ing provided with an inwardly directed bead having an inner diameter slightly greater than the diameter of said cylindrical mouth portion but less than the greatest diameter of said pro 65 jections, whereby when the closure is positioned on the container with said inwardly directed bead engaging the downwardly and inwardly tapering faces of said projections, the constrict ing eifect of said head urges the closure in a 70 downward direction and holds said gasket com pressing portion of the closure in yieldable en gagement with said gasket. ‘ HARRY E. TOWNSEND.