US2063557A - Metal container - Google Patents

Description

w.-F, PUNTE METAL CONTAINER Filed Dec. 10, 1934 Skim/mug S I i I Patented Dec. 8, 1936 UNITED STATES PATENT OFFICE METAL CONTAINER Application December 10, 1934, Serial N01 756,872

2 Claims. (01. 220-61) a shoulder, a cover having a depending skirt adapted to extend along the outer face of the body wall terminating substantially at said shoulder, a ring of sealing material engaging the shoulder at the lower edge of the skirt, and a metal sealing strip adapted to compress the sealing ring against the shoulder and the lower edge of the skirt.

An object of the present invention is to provide a container of the above type wherein the shoulder is so constructed as to allow the sealing material to be compressed much tighter without distorting the can body, thus making a more effective seal than heretofore accomplished.

In the drawing- Figure 1 is a plan view of the improved container;

Fig. 2 is a view in side elevation of the same,-

Fig. 3 is an enlarged sectional view through the upper portion of the container with the sealing strip loosely applied and the sealing material in place;

Fig. 4 is a View similar to Fig. 3, but showing the strip tightly applied to compress the sealing material for establishing a seal, and

Fig. 5 is an enlarged sectional view of a container of the type shown in Figures 3 and 4, showing a slight modification of structure.

The invention is directed to a container consisting of a body portion having an open end. The metal at the open end is rolled so as to form a hollow bead and conceal the raw edge of metal. The body is provided with a bend in the wall thereof directly under the head to form a shoulder on the outer face of the container which is disposed adjacent the bead. The cover is preferably provided with a depression which fits within the beaded open endbf the container body. The cover has a depending skirt which slips down over the outside of the body wall. Said skirt is turned back upon itself so as to provide a smooth thickened edge at its lower end. A sealing ring or gasket placed against the shoulder in the body wall and against the lower end of the skirt which is on a line therewith, and a sealing strip is applied for securing the cover to the container and sealing the same.

The sealing strip has a portion underlying the cover, a portion extending vertically along the outside wall of the skirt to a point below the same, and a portion turned in at its lower end, which underlies the shoulder on the outer face of the container and sealing gasket placed thereagainst. When pressure is applied to the upper and lower faces of the sealing strip, the vertical portion thereof will be shortened and the gasket will be forced against the shoulder and compressed to form a tight joint for sealing the container. In the present invention, the shoulder formed in the body wall against which the gasket is compressed is of two or more thicknesses of metal. whereby a rigid abutment is formed against which greater force may be applied for making a tight seal without distorting the mouth of the can body.

Referring more in detail to the drawing, the improved container consists of a body portion I preferably made of metal and cylindrical in form. To one end of the body portion is attached a closure end 2 which is secured thereto by a double seam 3. The outer end of the body wall is rolled or curled as indicated at 4. This forms a bead at the end of the body wall and conceals the raw edge of metal. It also makes a smooth edge at the end of the body wall when the container is opened and strengthens the open end of the body so as to maintain its rounded form.

In the preferred form of the invention shown in Figures 3 and 4 of the drawing, a portion of the body wall 5 is bent outwardly and the walls of said outwardly bent portion are brought into contact, thus forming a sealing shoulder 6. The projecting portion thus formed is of two thicknesses of metal, and this provides a rigid abutment against which a sealing ring may be compressed, as later set forth. In forming the sealing shoulder 6, it is desired that it should-be so formed as to extend upwardly at a slight angle to the horizontal from the body of the instead of two.

as indicated at H. The folded skirt extends down outside of the body wall and along the outer face of the bead. The skirt is of such length that the lower edge I 2 thereof is disposed at a slight distance below the inclined shoulder 6. An elastic sealing ring or gasket l3, preferably of rubber, and rectangular in cross section, is placed beneath the shoulder 6, and the lower edge l2 of the skirt ll] of the cover.

The cover 1 is secured to the container by means of a sealing strip M, the ends of which overlap. One end is provided with a tongue or tab l5 which may be utilized for removing the sealing strip when it is desired to open the container. The sealing strip I4 is bent so as to provide a portion l6 which overlies and extends all the way across the portion 9 of the cover I. This overlying portion is curved in the same direction as the portion 9. The sealing strip I4 has a vertical portion I! which extends downwardly along the outer wall of the skirt II] to a point below the skirt and the sealing gasket l3, and is provided with an inwardly projecting portion l8 at the lower edge thereof, which is adapted to underlie the lower face of the sealing gasket.

The vertical portion ll of the sealing strip l4 extends sufficiently below the lower edge of the skirt ID of the cover to form a pocket to receive and house the sealing gasket l3. When pressure is applied in a direction parallel with the wall of the container to the overlying portion l6 and the underlying portion l8 of the sealing strip, the vertical wall I 1 of said strip will be shortened and the gasket be compressed within the pocket provided therefor and forced against the inclined shoulder 6 and lower edge l2 of the skirt. Because of the additional strength given to the shoulder 6 by forming the same of two thicknesses of metal, a rigid abutment is provided against which more force may be applied and a tighter seal may be effected without distorting the mouth of the can body.

In the modified form of the container shown in Fig. 5, the bead at the upper end thereof is rolled inwardly instead of outwardly as disclosed in the form shown in Figures 3 and 4. The body wall beneath the bead is inset and the portion of the metal which forms the inclined shoulder consists of three thicknesses of metal This provides a sealing shoulder which is even more rigid than that shown in Figures 3 and 4.

When it is desired to open the container, the tab or tongue is pulledand this will remove the sealing strip, exposing the sealing gasket which may be likewise removed. The cover can then be easily removed and replaced at will, and thus used for reclosing purposes.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is-- 1. A metal container including in combination a body portion having the upper edge rolled to form a hollow bead, said body portion being bent outwardly and having the walls of said outwardly projecting portion bent into contact to form a rigid double wall sealing shoulder, the lower face of which inclines upwardly and outwardly, a cover for said container having a depending skirt adapted to extend over the container body and terminating slightly below the outer edge of the lower inclined surface of the sealing shoulder, a sealing gasket encircling the container and adapted to engage said shoulder and the lower edge portion of said skirt, a metal sealing strip having a portion overlying the cover, a portion extending vertically along the skirt of the cover and sealing gasket, and a portion projecting inwardly and adapted to underlie said gasket whereby when pressure is applied to the upper and lower portions of the sealing strip, the gasket will be forced against the sealing shoulder and compressed to form a tight joint for sealing the container.

2. A metal container including in combination, a body portion having the upper edge thereof rolled to form a hollow bead, said body portion being bent outwardly and having the walls of said outwardly projecting portion bent into contact to form a rigid double wall sealing shoulder, said sealing shoulder being disposed directly beneath said hollow bead and in contact therewith, the lower face of said shoulder being inclined upwardly and outwardly, a cover for said container having a depending skirt adapted to extend over the container body and terminating slightly below the outer edge of the lower inclined surface of the sealing shoulder, a sealing gasket encircling the container and adapted to engage said shoulder and the lower edge portion of said skirt, a metal sealing strip having a portion overlying the cover, a portion extending vertically along the skirt of the cover and the sealing gasket, and a portion projecting inwardly and adapted to underlie said gasket whereby when pressure is applied to the upper and lower portions of the sealing strip, the gasket will be forced against the sealing shoulder and compressed to form a tight joint for sealing the container.

WILLIAM E. PUNTE

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