US2037920A - Strip seal metal container - Google Patents

Description

April 21, 1936 A w PUNTE 2,037,920

' STRIP SEAL METAL CONTAINER Filed May 25, 1952 Zhwentor Ottorneg Patented Apr. 21,1 1935 UNITED STATES PATENT OFFICE srrur SEAL 2:1 1? CONTAINER I William F. Punte,

Syracuse, N. 'Y., assignor to Inc., New York,

N. Y., a corporation of New York Application May 23, 1932, Serial No. 613,094

2 Claims.

The invention relates to new and useful improvements in metal containers, and more particularly to a metal container wherein the cover is secured to the container body by a sealing strip.

An object of the invention is to provide a metal container having a body portion provided with a retaining shoulder and a cover which overlies the body portion engaging an elastic gasket interposed between the cover and the container body, with a sealing strip which underlies said shoulder and overlies the cover, and which securely clamps the cover to the container.

A further object of the invention is to provide a container'of the above type wherein the cover has an outside slip engagement with the container body and is'provided with an upwardly projecting portion forming a recess for the sealing gasket so that said sealing gasket may extend I beyond the side wall of the container body.

\ a holding shoulder spaced from and adjacent In the drawing-' Figure l is a view partly in side elevation and partly in section showing a metal container embodyingthe improvements;

Fig. 2 is a plan view of a portion of the same; Fig. 3 is an enlarged vertical section through a'container and sealing assembled and prior to the subjecting of the sealing strip to pressure for sealing-the container, and Fig. 4 is a view similar to Fig. 3, but showing the sealing strip after pressure has been applied for the closing of the container.

The invention is directed to a metal container having a cover provided with a depending flange which slips down over the container body making engagement therewith so that said cover provides a closing means for the container after the sealing strip has been removed. The body wall of the container has an annular depression forming the upper edge of the body wall. Said body wall terminates in an inturned hollow bead. The cover flange is bent outwardly at the upper portion of the flange and the cover disk is likewise curved upwardly directlyabove the bead on the container body, so as to provide a recess or channel for the sealing material. The flange terminates adjacent but above the holding shoulder on the container body, and is bent outwardly and inwardly to form a. half bead, the inner face of which is in line with the inner face of the flange. The sealing strip has its ends overlapping. Said sealing strip has an inwardly extending portion which underlies the shoulder on the container. It also has an inwardly projecting portion which overlies the cover. The upper face of the cover is strip showing the parts curved outwardly, and the inwardly projecting portion of the sealing strip is also curved initially about a shorter radius, but so that the inner edge thereof extends well over the curved portion on the cover. After the sealingstrip has been applied to the container, and the ends of the sealing strip joined, it is then subjected to die pressure in a direction lengthwise of the container wall, which shortens the-distance between the inwardly projecting portions of the sealing strip, causing the upper portion thereof to curl inwardly and downwardly into contact with the cover. This pressure applied to the sealing strip also forces the cover into tight sealing contact with the. container body, and the sealing strip. Whenreleased, holds. the cover in sealed engagement with the container.

body.

Referring" more in detailto the drawing, the container consists of a body portion l which is preferably cylindrica. A closing bottom end 2 is secured to the container body by double-seaming. Said container body is provided ,at the upper end thereof with .an .inturned hollow bead 3. At a distance below this hollow bead is an annular depression 4 providing a substantially horizontal holding shoulder 5. This annular depression or necking-in of the ,body produces a container wherein both ends are of substantially the same diameter, and at the same time the locking shoulder for the retaining ring is provided in the wall of the container. The container is closed by a cover 8 which is in the formof a disk extending across the open end of the container, and a depending flange 1. This flange extends down over the body wall of the container, engaging the same so as to be held thereon by a light frictional grip. This provides a cover which may be used for re-closing the container after the sealing strip is removed. The cover flange is bent outwardly at 8 and the cover disk is curved upwardly at 9 in order to form a channel for the sealingrnaterial which is in the form of a sealing ring it). While a sealing ring is shown, which is pre-formed, the sealing material -may be placed on the cover, or a sealing disk extending all the way across the cover may be used. The lower edge of the flange terminates adjacent but above the holding shoulder 5. Said flange is bent outwardly, thence downwardly and inwardly to form a half bead l l, the inner face of which is substantially in line with the inner face of the flange. This bead at the lower end of the flange of the cover serves to place the sharp edge of the cover flange adjacent the body and prevents any danger of cutting the hands when removing the sealingstrip. It also forms a substantial support for the sealing strip to rest against when it is pressed into position and maintains the wall of the sealing strip substantially parallel with the upper section of the body wall.

The cover is secured to the container body by a sealing strip which is indicated at It in the drawing. Said strip has overlapping ends, one of which is indicated at ii. The upper portion of the sealing strip is bent inwardly at II and overlies the cover. This inwardly bent portion is curved upwardly and downwardly and initially about a smaller radius than the curved portion I of. the cover. It contacts with the curved portion of the cover when applied thereto well beyond the crown of the curved portion I. The sealing strip I2 is also provided with an inwardly projecting portion I! atits lower edge which is initially slightly inclined upwardly. This inwardly projecting portion l2- extends underneath the shoulder I when the seating strip is applied to the container.

In m, a of the drawing, the sealing strip is shown as having been applied to the container after the parts are assembled. It is then subjected to die pressure. One of the dies extends beneath the inturned portion 12', while the other overlies the inturned portion ll of the sealing strip. The dies when moved toward each otherengage the sealing strip and shorten the sealing strip between the inturned portions I! and I4 thereof. The dies starting at the inturned portion l2" and continue to curl the portion ll whichv results in a shortening of the distance between the inturned portions. This die pressure also forces'the cover into very tight sealing contact with the gasket It, and the gasket into contact with the hollow bead 3. Thus it is that a very tight seal is produced, and the sealing strip. when the die pressure is released, retains the cover in this tight sealed engagement with the: container body.

The method of closing the container which includes the: steps of de-forming the sealing strip bydiepressurewhich isexerted inadirection lengthwise of the container wall while the sealing strip is restrained against any bulging or detaching movement is described more in detail and claimed in my co-pending application Serial No. 11,852, flied. March 19, 1985. When it is desired to open the. container and break the seal, the end I of the strip is forcibly pulled outwardly'and this will disconnect the sealing strip from the container. The cover can then, be re moved and replaced for re-closing the container It 111. k

The can. body is made in cylindrical form, after which the outer edge is rolled to iorm a bead. 'lhis rolling of the edge produces a severe strain on the lapped portions of the body atthe side seam, and sometimescauses the bond to be broken. The fracture does not extend far along theside seam, and by the present construction of cover and sealing band, the sealing material extends well over on to the outer face of the bead and the body wall so as toinsure a perfect seal.

It is obvious that minor changes in the details of construction of the metal parts and in the manner of applying the pressure for deforming the sealing strip and sealing the container 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-

l. A metal container comprising a body portion having an annular depression in the wall thereof adjacent the upper end forming a holding shoulder, said body wall being rolled inwardly at its upper edge to form a hollow bead, said shoulder being disposed beneath said hollow bead, a cover havinga depending flange extending over and engaging the outer face of the wall of the container, said flange terminating adjacent and above said shoulder and being bent outwardly and inwardly to form a half head at the lower edge of said flange, said cover flange being bent outwardly at the upper portion there- 01 and adjacent the hollow bead, said outwardly bent portion being of substantially the same diameter as the diameter of the halfbead at the lower edge of the flange, said cover having an annular portion above the hollow bead which is curved upwardly, a sealing member located within the cover and extending across the annular portion and into the recess formed in the cover flange, and a sealing strip having inwardly projecting portions, one of which underlies the shoulder on the container body and the other of which overlies the upwardly curved portion of the cover directly above the hollow bead, whereby said sealing strip may be utilized for forcing the cover against the sealing material and the sealing material against the hollow bead on the container body by direct pressure lengthwise of thewall of the container.

2. A metal container comprising a body portion having an annular depression in the wall thereof adjacent the upper end forming a shoulder, said body wall being rolled inwardly at its upper edge to form a hollow bead, said shoulder being displaced beneath the bead, a cover having a depending flange extending over and enl sin 'the outer face of the wall of the container, said flanges terminating adjacent and above the shoulder and being bent outwardly and inwardlytoformahalfbeadattheloweredge of said flange, said cover flange being bent outwardly at theupper portion thereof and of sub- .stantially the same diameter as the diameter of the half head at the lower edge of the flange, said cover having an annular portion above the hollow head which is curved upwardly, a sealing member located within the cover and over said hollow bead, and a metal sealing strip having inwardly projecting portions, one of which underlies the shoulder of the container body and the other of which overlies the upwardly curved portion of the cover directly above the hollow bead whereby said sealing strip may be utilized for forcing the cover against the sealing material and the sealing material against the hollow bead on the container body by direct pressure lengthwise of the wall of the container and against the upper and lower faces of the metal sealing strip.

WILLIAMEPUN'I'E.

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