US2063538A - Metal container - Google Patents

Description

METAL CONTAINER Filed April 24, 1955 Patented Dec. 8, 1936 UNITED STATES 2,063,538 METAL CONTAINER,

Jacob Dahl, Chicago, Ill., as'signor to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application April 24, 1935, Serial No. 18,044

1 Claim. (01. 220-39) The invention relates to new and useful improvements in metals containers wherein the cover is secured to the body by interrupted screw threads.

An object of the invention is to provide a container of the usual lock and lap seam construction wherein an endless threaded collar is fixedly attached at the open end thereof for the purpose of removably securing a cover to the body portion of the container.

A further object of the invention is to provide a container of the above type wherein sealing compound is interposed between the separate parts thereof for producing a hermetic seal for the container.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

Referring to the drawing Figure 1 is a vertical sectional View of the container and the endless threaded collar provided therefor;

Fig. 2 is a view partly in section and partly in side elevation of the improved container with the endless threaded collar fixedly attached thereto;

Fig. 3 is a view partly in section and partly in side elevation of the container showing the threaded cover attached thereto;

Fig. 4 is an enlarged partial sectional view at one side of the container, and

Fig. 5 is an enlarged partial sectional view similar to Fig. 4 with the cover applied.

The invention relates particularly to a container of the lock top type wherein a cover having interrupted threads is provided for closing the container. The container comprises a body portion formed from a blank of sheet metal curved into cylindrical form and having its edges joined by the usual lock and lap seam. The container has a bottom end seamed thereto and has the upper edge portion thereof curled inwardly to form a hollow bead. An endless collar having interrupted screw threads embossed therein is attached to the container and is so dimensioned as to fit over the body portion of said container. The endless collar has an inwardly projecting portion and a plastic sealing compound disposed beneath said projecting portion. After the collar is placed over the container, the inwardly projecting portion thereof is bent downwardly and inwardly beneath the bead on the container body for rigidly securing the same to the container. As the projecting portion is thus turned inwardly so as to clamp the collar on the container body, the sealing compound will be compressed and an air-tight joint formed between the endless collar and the container body. A closure having a depending skirt or flange is provided for closing the con- 5 tainer. Said cover has a central depression and a recess located above the bead on the contamer-body. In the recess is placed a sealing compound so as to provide a hermetic seal for the container when the cover is applied. The coveris also removably secured to the collar by an interrupted thread.

Referring more in detail to the drawing, a container embodying the invention is indicated at 6. The container comprises a body portion 1 having a bottom end (not shown) of the usual type double seamed thereto. The body portion 1 is formed from a blank of sheet metal having the side edges thereof joined in the usual lock and lap seam, as indicated at 8. The upper edge of the container body is curled inwardly to form a hollow bead 9 which is left partly open. An endless collar 10 is provided for the container having interrupted screw threads H embossed in the skirt portion thereof. The inner diameter of the skirt portion is substantially the same as the outer diameter of the container body so that the skirt portion of the collar will frictionally fit over the outside of the container body. The collar ID is provided with a projecting portion l2 which is adapted to be bent downwardly and inwardly beneath the bead 9 on the container body for rigidly securing the collar to the container body. A sealing compound 13 is applied to the endless collar so as to be interposed between the collar and the bead on the container when the parts are assembled. This affords an air-tight seal between the two members when the projecting portion I2 is curled about the bead l3.

A closure cover 14 having a depending skirt I5 is provided for closing the container. The skirt I5 is embossed with suitable interrupted threads and is adapted to fit over the collar when secured in place. The cover I4 has a central depressed portion I6 which provides a suitable recess or pocket directly over the bead 9 for a sealing gasket I1, and said sealing gasket provides a hermetic seal when the cover is tightly secured in place.

From the above it will be apparent that a container has been devised wherein a threaded cover is used for closure and wherein the body portion thereof is provided with a lock and lap seam. In manufacture, it has been found dificult to emboss threads in a container body having a lock and lap seam joint, because of the double thickness of metal of the seam thereof. Furthermore, when an endless collar is used it provides a smooth upper edge portion with which the gasket or sealing compound carried by the cover contacts and this enables a very tight joint to be formed. By fixedly attaching an endless collar with interrupted threads to a container body of this type, a container is produced which is simple in construction and cheap to manufacture. By interposing sealing gaskets between the interfitting parts, a hermetic seal is established when the parts are assembled. The endless collar with its curled connection to the bead on the container body greatly strengthens the open end of the container and prevents the threads on the cover slipping over the threads on the collar when turned down so as to establish a tight seal between the cover and the container body. A container of this type is very useful for such products as face creams, ointments, soap pastes and the like, because of the air-tight seal that can be obtained. While an interrupted thread is described, it will be understood that a single continuous thread, a divided thread, or any other similar form of interengaging means may be used.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the gamma 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-

A metal container comprising a sheet metal body portion having a lock. and lap seam for joining the side edges thereof, said body portion having the upper edge thereof curled inwardly to form a bead, an endless collar adapted to fit over said container, said collar being curved at its upper edge portion inwardly and downwardly about said bead on the can body for firmly connecting said collar to said can body and thus producing an edge portion for said can body which is circumferentially unbroken, a sealing material between the bead and the inner surface of the collar for sealing the connection therebetween, said collar having projecting holding members formed therein, a closure for the container having a depending flange adapted to extend down over said collar, said flange having holding members formed therein adapted to engage the holding members on the collar for drawing the closure into tight sealing contact with the said collar, said closure having a recess formed therein directly above said collar and a sealing material in said recess for forming a tight hermetic seal between the closure and the container.

JACOB DAHL.

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