US2008593A - Jar closure - Google Patents

Description

, July 16, 1935. o. F. PEDER'SEN 2,008,593

JAR CLOSURE Filed June 2'7, 1952 Patented July 16, 1935 I UNITED STATES PATENT OFFICE JAR CLOSURE Oscar F. Pedersen, Riverside, Ill., assignor to 1 Phoenix Metal Cap 00., Inc., a corporation of New York Application June 2'1; 1932, Serial No. 619,584

f 1 Claim. (Cl. 215-91) The invention relates to new and useful imwhich is adapted to extend down along the outer provements in jar closures, and more particularly face of the jar. The jar closure has a'depressed jar closures of the type where a band presses the central portion providing the inner inclined wall closure cap against the sealing gasket for sealing I, and this inner wall 'I together with the flange 6 the jar. 6 forms a channel. Located in this channel is An object of the invention is to provide a sealan elastic gasket 0. The gasket may be flowed ing band which is' constructed so that the presinto the channel when the closure is placed with sure against the closure cap is localized and ;the channel facing upward and the elastic sealcentered over the ideal sealing point between the ing material allowed to dry or set so as to form 1 sealing band and the lip of the jar. v on the closure an elastic closure gasket. This 10 Inthe drawing: gasket may be otherwise formed and otherwise Figure 1 is a view partly in section and partly attached to the closure. The-closure with the in side elevation of a jar with the closure cap atgasket applied thereto is inverted and placed on tached thereto and the jar sealed by the improved the jar. The gasket extends all the way across clamping band, the lip of the jar and overhangs the inside edge 15 I Figure 2 is an enlarged sectional view showing of the lip and also the outside edge of the lip. the closure cap and band assembled on the jar The closure is forced into sealing contact with before the band is screwed down so as to clamp the jar by a clamping band 3. This clamping the closure to the jar, i band extends down alongside "of the neck of the Figure 3 is a similar view showing the band jar and is provided with a thread which coop- 20 screwed down and-the closure cap in tight sealed erates with the threads 2 on the jar neck. 'Said contact with the jar head. band has an inwardly projecting annular portion The invention has to do with a jar closure I l which is provided with an annular bead ll which includes a jar closure cap provided with for strengthening the same. The inner edge of it a channel in which is placed a sealing gasket. the portion ill is folded back underneath as in- The jar closure with the sealing gasket is inverted dicated at II. This underturned portion is placed and placed on the jar so that the sealing gasket flat against the underface of the annular inwardly contacts with the lip of the jar from the inside projecting portion of the band. The underturned to the outside thereof, slightly overlying both portion i2 thus providesa relativelynarrow rib the inside and outside edges of the jar lip. The or band which contacts with the outer face of Jar closure is forced into sealing contact with the jar closure 4. This initially is the sole sonthe jar by a clamping band which may be secured .tact between the screw band and the jar closure. to the jar in anyvsuitable way but preferably by The contacting surface of i the screw band is screw threads. The clamping band has an an- ,th'erefore localized andcentered directly over the nular inwardly, extendingportion which overlies inside of' the lip on the jar. This is the ideal sealthejar closure and the inner edge of the annular ing point. The pressure. of the rib against theportion is turned underneath and extends for a jar closure will force the sealing material downdistance outwardly ilat'against the underface of wardly and inwardly along the inside lip of the the band. This underturnedportion provides a jar 6 making a'very tight sealing line, m, Y9 strengthening of theedge of the annular portion sealing line is indicated at a in Figure" 3o: the 40 of the band and it provides a contracting rib drawing. which engages the jar closure directly over the From the above it will be apparent that a inside edge of the sealing lip'of-the jar which closure has been provided; for a jar wherein a is the 'idealsealing point. In this way the pressealing band through the. localized pressure at sure on the closure is localizedso as to bring the ideal sealing point brings about a very tight 45 aboutavery tight seal betweenthesealing gasket. seal between the closure cap, sealing gasket and. the jar closure, and the lip of the jar. the lip of the jar. It is obvious that the clamp-- Referring more in detail to the drawing; the, ing band may be otherwise connectedto the jar jar is indicated at I. The jar as shown is proso that it will be drawn into tight clamping convided with'a screw thread 2 which projects from tact with the jar closure. The essential. feature the outer face of the neck of the jar. The jar of applicantsinvention is not in the screw conneck-terminates at its upper end-in the usual nection between the band and the jar, but in form of rib I. The jar is closed by a cap or jar the formed rib on the underface of the inwardly closure 4 which is shaped so as toprovide a ehanprojecting portion of the band which localizes 5 nel i with a flange at the outer edge thereof the gripping pressure on the jar closure. It will be obvious that this localized pressure at the inner edge of the clamping band may be otherwise obtained without departing from the spirit of the invention as set forth in the appended claim.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

The combination of a jar having a sealing lip at its open upper end and a screw thread adjacent said lip, a closure cap having a channel in the under face thereof adapted to receive the sealing lip of the jar, a sealing gasket in said channel between said lip and the closure cap and overlying said lip at the inner and outer edges thereof, a clamping band having a skirt provided with a screw thread adapted to engage the screw thread on the jar, and an overlying portion adapted to contact with the closure cap, said overlying portion having a strengthening bead formed therein, the inner edge or said overlying portion being folded underneath and upon itself and disposed so as to lie wholly in the region directly above the insideedge of the lip of the jar, said underneath folded portion extending all the way around said closure cap and disposed in a plane beneath the outer edge of the over lying portion and serving as the sole means of contact between the clamping band and the closure cap whereby the pressure of the band is localized on the cap directly over the inside edge of the lip of the jar.

OSCAR F. PEDERSEN.

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