US1739692A

US1739692A - Hermetically-sealed package and method of sealing

Info

Publication number: US1739692A
Application number: US154973A
Authority: US
Inventors: Podel Abraham
Original assignee: Anchor Cap and Closure Corp
Current assignee: Anchor Cap and Closure Corp
Priority date: 1926-12-15
Filing date: 1926-12-15
Publication date: 1929-12-17
Anticipated expiration: 1946-12-17

Description

Dec. 17, 1929.. A. PODEL 1,739,692

HERMETICALLY SEALED PACKAGE AND METHOD OF SEALING Filed Disc. 15.- 1926 ATTORNEY 4 cally sealed Patented D... 11, 1929 UNITED STATES PATENT OFFICE ABRAHAM PODEL,, OF BRONX, NEW YORK, ASSIGNOR TO ANCHOR .CAP &

CORPORATION, OF LONG ISLAND CITY, NEW YORK, A CORPORATION OF NEW YORK EERMETICALLY-SEALED PACKAGE AND METHOD OF SEALING Application filed December 15, 1926. Serial No. 154,973.

The present invention relates to sealed packages and more particularly to a hermetipackage and method of sealing same.

An object of the present invention is to provide an effective hermetic seal between a closure cap and a glass container in such manner that the closure cap may be readily removed.

Another object of the invention is to provide a hermetic seal between a closure cap and a container by turning upwardly the free ed e of the skirt of the cap to press the gasket against the side wall of the container to form a seal and to reinforce the lower portion of the skirt.

A further object of the invention is to form a hermetic seal by pressing upwardly the free edge of the skirt of the cap to form substantially a wire edge which presses against the lower side of the gasket to squeeze the gasket against the side wall of the container; and by pressing the outer periphery of the bead. downwardly to increase the effectiveness of the seal;

Other and further obiects of the invention will be obvious upon an-understanding of the illustrated embodiment about to be described, and various ladvantages other than those herein specifically referred to will occur to one skilled in the art upon employment of the invention in practice.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawings, wherein Fig. 1 is a sectional view of a container with a closure cap applied thereto;

Fig. 2 is a fragmentary sectional view showing a portion of the container and closure with the sealing dies in position to form the seal;

Fig. 3 is an enlarged fragmentary view-illustrating one form of seal;

Fig. 4 is an enlarged fragmentary sectional view illustrating another form of seal, the free edge of the cap being turned in sufficiently to form substantially a wire edge; and

Fig. 5 is a fragmentary sectional View illustrating a form of seal applied to a container having a beaded sealing wall.

Heretofore in the art it has been customary to seal closure. caps, having depending skirts with gaskets therein, by pressing inwardly the lower portion of the bead enveloping the gasket to force the gasket against the side wall of the. container. The free edge of the skirt is pressed inwardly toward the container and almost in contact with the sealing wall thereof. The shape of the head is reduced during the sealing operation almost to the form of a cone, the lower edge of the cap being almost in contact with the vessel. Such a seal is effective but considerable difliculty is encountered in removing the caps from the containers for consumption of the contents. Cap openers when applied to such a package, are inclined to slip over the lower edge of the cap and in fact some types of cap openers are not properly constructed to engage the lower edge of such a cap, and- CLOSURE hence are practically useless for such packages. The raw edge of the cap frequently crinkles due to the reduction of its diameter thereby marring the looks of the package. Considerable trouble is also occasioned due to the tendency of the exposed raw edge to rust. This is particularly true where products'containing vinegar or acids are packed.

The present invention eliminates the above difiiculties by providing a cap having a cover portion and a depending skirt with a suitable. bead therein. The lower side of the bead may bean inturned holding flange. After the cap is placed -on the container this flange is pressed upwardly into the gasket whereby the free edge is embedded inthe gasket. This eliminates rust by concealing the free edge and in addition reinforces the holding flange against the downward forces exerted by the compressed gasket. In forming the wire edge the free edge of the cap engages thegasket and holds it securely in position and the continued rolling of the edge. squeezes the gasket against the sidewall of the container to form an effective seal. The efiectiveness of the seal may be further increased by pressing downwardly the outer periphery of the upper side of the bead thereby increasing the rompression of the gasket in the bead of cap. In

such a seal the upturned edge not only presses the gasket in a vertical direction but also in a horizontal direction both of which, due to the resilience of the gasket, tend to press it thereon. The closure cap preferably com-- prises a cover portion 3 and 21 depending skirt 4 with an annular bead 5 therein. The lower side of the bead preferably comprises a relatively narrow flange 7 adapted to retain a gasket 8 in position.

In the sealing operation an upper die lO is adapted to be nested over the cover portion of the cap with an annular bead engaging portion 11 bevelled at 12 to press theouter peri hery of the upper side of the bead downwar 1y. Suitable jaws or lower dies 14 extend about and below the upper die 10 and are adapted to open suificiently to permit the insertion of a container with a closure thereon, so that the bead of the cap will be positioned between the upper and

lower dies

10 and 14, respectively, as shown in Fig. 2. The lower die holds the outer side of the bead in position against the pressure applied during the sealing operation. The sealing portion of the jaws comprises an annular upward extending portion 16. As the jaws 14 are moved upwardly in the sealing operation, the portion 16 engages the edge of the flange 7 and presses it upwardly into the gasket as shown in Fig. 3. Continued upward movement of the jaw forces the inner edge of the flange further and further into the gasket causing it to engage same and hold it firmly in position.

If the jaw is moved upwardly sufficiently far, a wire edge will be formed substantially .as shown in Fig. 4 with the free edge 17 of the cap holding the gasket firmly in position. The curved portion 18 of the wire edge presses the gasket firmly against the container rendering it effective over a substantial area. The upturned edge reinforces the holding flange particularly in a vertical direction and prevents deformation due to the pressure imposed by the compressed gasket. The bev elled portion 11' of the upper sealing die increases the effectiveness of the seal by pressing downwardly and inwardly the upper side of the bead. This tends to press the gasket against the container and also'tends to press the outer side of the gasket downwardly to render the upturned edge of the cap more effectivein holding the gasket firmly in position to seal the container. I

It is customary with certain types of proding blown off by pressures which are less than those required to break the container. In such cases the contents are spoiled because the seal is not capable of standing the pressure which the container .will stand. To remedy this a type of seal is shown in Fig. 5

wherein the side wall of the container has a locking head 19 on its substantially cylindrical sealing surface against which the gasket 7 is pressed to lock the cap in position.

It will be noted that the inwardly turned wire edge presses the gasket directly against the head on the side wall of the container and that the cap is firmly locked in position. It will be seen that the present invention provides an inexpensive seal which effectively retains a cap on a glass container. The free unlacquered edge of u the cap is embedded in the gasket and may be turned sufi'iciently to form substantially a Wire edge so that the free edge is concealed to prevent rust and reinforced to withstand the pressure to which it'is subjected by the gasket A substantial space is left between the inturned edge and the wall of the container to facilitate the application of a cap opener for removal of the cap. Further the curvature of the wire edge greatly facilitates the application of an opener and furnishes a substantial operative surface for pressing the gasket laterally against the container, thereby rendering the pressure efl'ective over a substantial zone. Such a package is adapted to withstand the rough usage to which it maybe subjected, and all ordinary pressures encountered due to changes in temperature and thelike.

As various changes may be made in the aboveembodiment without departing from thespirit of the invention, it is to be understood that the above description is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim:

1. A hermetically sealed package comprising a container having a substantially cylindrical sealing wall, an annular holding head on said sealing wall, a closure cap having a cover portion and a depending skirt, a bead in said skirt, the lower side of the bead in said skirt being an inwardly extending holding flange, and a gasket in said bead, the free edge of said skirt being turned upwardly into said gasket to press said gasket laterally against the holding bead and the side wall of the container to lock said capl firmly in position and to form a hermetic sea 2. A hermetically sealed package comprising a container, a closure having a cover portion and a depending skirt, ahead in the skirt of said cap, and a gasket in said bead, the lower unrolled edge of said skirt being turned upwardly and outwardly toward the skirt of the cap during the sealing operation to form substantially an inturned'wire edge engaging by, means of its convex-surface the lower side of said gasket to press said gasket laterally against the side wall of the container. v a

3. A hermetically sealed package comprising a container, a closure cap having a cover portion and a depending skirt, a bead in the skirt of said cap, and a gasket in said bead, the outer periphery of the upper side of said bead being pressed downwardly to force said gasket lateral against the side wall of said container, the free unwired edgeof said cap being formed into substantially a wire edge to engage the lower side of said gasket and further compress it by means of the convex portion of the wire laterally against the side wall of the container.

4.. A hermetically sealed package comprising ,a container having a substantially cylindrical side wall with an annular bead thereon, a; closure cap having a cover portion and a dependent skirt, a bead in the skirt of said cap, and a gasket in said bead, the lower side of the bead in the skirt of said cap being turned upwardly into a wire edge to press said gasket against the bead on the side wall of said container to lock said cap in position and to form a hermetic seal.

5. The method of sealing containers, such as glassjars and the like having a bead on the side wall thereof, with closure caps having gaskets in the skirts thereof, which method comprises turning upwardly the free edge of the skirt to form substantially an inturned wire edge on the bottom of said skirt to engage and press inwardly by means a of the convex side of the wire a portion of j said gasket and thereby squeeze said gasket against the side wall of said container and against a bead thereon to form a hermetic seal.

6. The method of sealing containers, such as glass jars and the like having an annular .bead on the side wall thereof, with closure caps having gaskets in the skirts thereof,

which method comprises placing a cap on a container with a gasket in the skirt thereof and turning upwardly the lower edge of said skirtto form a wire edge and causing the convex .side of said wire to engage the lower side of said gasket to press it laterally against the side wall of said container and against a bead thereon to form a hermetic seal whereby the raw edge of said cap is concealed by said gasket and a substantial space remains.

between said edge and the side wall of the container to facilitate removal of the cap.

7. The method of sealing containers, such as glass jars and the like, with ,closure caps having gaskets in the skirts thereof, which method comprises placing the cap on a container and turning upwardly and outwardly the lower edge of said skirt during the sealing operation to form substantially an inturned wire edge and causing the convex sideof said wire edge to engage the lower side of said gasket and press it laterally against the side wall'of said container to form a hermetic seal.

8. A hermetically sealed package comprising a container with a bead on the side wall thereof, a closure cap having a cover portion and a depending skirt, a head in the skirt placing a cap on a container, rolling upwardly and outwardly the lower unrolled edge of the cap during the sealing operation to form substantially an inturned wire edge, and causing the convex side of( the wire edge to engage the lower side of the 1 gasket and to press it laterally against the side wall of said container to form a hermetic seal.

' ABRAHAM PODEL.