US1989428A

US1989428A - Hermetically sealed package

Info

Publication number: US1989428A
Application number: US341232A
Authority: US
Inventors: Scofield Edgar
Original assignee: Anchor Cap and Closure Corp
Current assignee: Anchor Cap and Closure Corp
Priority date: 1929-02-19
Filing date: 1929-02-19
Publication date: 1935-01-29
Anticipated expiration: 1952-01-29

Description

1935- E. SCOFIELD HERMETICALLY SEALED PACKAGE Filed Feb. 19, 1929 BY l 4 2 Q M ATTORNEY package, and is an improvementffupon' w itsfeatures are applicable Certain types of side so a v I to be-stacked one upon another to 'space Patented Jeni I935 w rates" 1 W am AW mar-stand new rqrnivrzqsm rtonn- App ica or.

- 1o. The present inventio rel ase hg g m vandvmore part u y rtojaohermticamy,

commonly known as side seals."='although of t theric sfiru ib 7 alclosures are adapted:

and to facilitate shipment."

stacked caps may be put into feedingdevices aps on containers as they pass. One of the difficultiesencountered which will place individual c with these stacked caps is'that the bottomsvof the respective caps rest upon the decorated parts ofadjacent caps. The relative movement between the two in stacked relation may'mar the decorai" the respective caps during f tion on the tops of shipment. 4

,Many of the sideseal closures have beads in the skirts adapted to seat gaskets, the beads being depressed during the sealing operation to force the gasket against the container. With these caps thereis a tendency for the gasket to force its way out of the bead duringand'subsequent to the sealing operation. Any impairment'of the;

pressure on the gasket by the closure cap cause a defective seal; Difliculty is alsoencoun tered in the opening of these caps .due' to the fact that the lower edge of the skirt has to be pressed sufiiciently close to the side wall of-the' vessel to hold the gasket in place. 'As a result,

considerable difliculty is encountered. in getting a bottle opener to hook under the bottom of the cap. The sharp hooks on the openers frequently tear the edge of the cap, making it useless as a reseal or as a cover cap and preventing its removal by a single operation of the cap opener.

The present invention aims to overcome the difiiculties of the present types of caps noted above by providing a cap which is adapted to stack without marring the lacquer on an adjacent cap, which will form a very effective seal on a container, and which may be readily removed in a single operation with a cap opener without impairing its value as a reseal closure. These and other advantages are attained in the present invention. 1

An object of the invention is to provide an inexpensive closure cap adapted to form a secure seal, the effectiveness of which is not likely to be impaired during shipment or other handling.

Another object of the invention is to provide a secure seal by constricting the skirt of the cap to press the gasket against a container immediately above the reinforced part of the by the gasket is held firmly in position.

In addition," the cap, where- &. Closure corp ratio Island Y.,' afoot-notation of-.New York Another object of invention is to provide a osure'oap. adapted retain a gasket rigidly in position. a

Another object of the invention is the provision urefgcap adapted to stack with other closure aps,fthelower edge thereof resting-upon the decorated covers without marring the decoratrons. I

Another object of the invention is to provide a closure cap adapted to withstand pressure apl0 plied by a hooked cap opener so that the cap can beireadily removed without destruction.

Another object of the invention is to provide a method of sealing whereby a cap is reinforced immediately below the gasket, and the gasket 16 is'pressed against a container immediately above the reinforcement to efl'ect a secure seal.

Other and further-objects of the invention will be obvious upon an understanding of the illustrative embodiment about to be described or will 20 v be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice. -A', preferred embodiment of the invention has 26 been chosen for purposes of illustration and description and is shown in the accompanying drawing, wherein Fig. l is a sectional view of stage 'of manufacture; 1 Fig. 2 is a sectional view of the completed closure cap; and v Fig. 3 is a sectional view illustrating a gasket applied to the closure cap shown in Fig. 2;

Fig. 4 is asectional view illustrating caps in 35 stacked relation;

Fig. 5 is a fragmentary sectional view illustrating a closure cap applied to a container;

Fig. 6 is a fragmentary sectional view of a different form of cap; I

Fig. 7 is a fragmentary sectionalview illustrating-the gasket applied to the cap; and

Fig.8 is a fragmentary sectional View illustrating the closure applied to a container.

Referring more particularly to the drawing, 4 there is shown a closure cap having a cover portion 1 and a depending skirt 2 with a bead 4 therein. The lower edge of the skirt isrolled inwardly to form an inturned wire edge .5 adapted to serve as the lower side of the bead 4 and 50 as a support for a gasket 6. While the cap can be formed in any suitable manner, preferably the blanks are stamped from sheets of tin into the form shown in Fig. l. Thereafter the blanks are placed in a rolling machine or operated upon by a blank in'the first dies to form an inturned wire edge at the bottom thereof. This inturned edge extends sufficiently far inward to hold a gasket in place.

The gasket may be applied by machinery or by hand and is generally slightly larger than the skirt of the cap so that it will press resiliently against the side of the bead and can be held in position by the relatively narrow inturned portion at the bottom.

In the sealing operation, suitable dies operate upon the bead in a substantially vertical direction to transform it from the shape shown in Fig. 3 to that shown in Fig. 5. The.l ower part of the bead is pressed inwardly and upwardly as shown by the arrow '7. The inward constriction of the lower part of the bead confines the gasket between the wire edge 5 and the upper side of the bead and the upward constriction of thebead presses the gasket more firmly into engagement with the container. By reason of the reinforced lower edge, it is possible to leave a greater space between the metal of the cap and the side of the container without permitting the gasket to be forced therebetween. The reason for this is that with a strong lower edge, the cap remains in the set position determined by the dies whereas with a single thickness of metal at this point there is likelihood of a stretching action which is not uniform in all cases and, hence, greater care must be taken to prevent the cap being too loose.

In removing the cap an ordinary hooked bottle opener may be applied to theclosure similarly to the removal of a cap from a soda pop bottle. The hook engages the wire edge 5, the curved portion of the edge furnishing an excellent hold for the opener, to pull the cap over the side of the container. Due to the several thicknesses of metal in the reinforced edge, there is no likelihood of the hook cutting through the metal or breaking it in any way. Hence, the cap may be removed in a single operation or in a plurality of operations, as desired. Distortion of'the bottom of the cap is minimized and this permitsa cap to be used as a reseal closure or as a cover cap for the container while the contents are being consumed. An additional feature of the wire edge 5 is that it gives a very smooth surface to the bottom of the cap which permits the caps to be stacked one upon another, asshown in Fig. 4, with the rolled lower edge engaging the upper side of the bead of an adjacent cap. It is customary to lacquer the caps or otherwise decorate them to improve their appearance, hence the engagement of a rough edgewith the lacquer or other decoration scratches and mars the caps. In many instances, the beauty of the cap sells the product and slight damage to the external portion of the cap is a serious handicap. In the present cap, the rolled edge 5 presents a coated fiat surface of metal which rests upon the external portion of the bead. The gaskets 6 engage the conical parts of the caps and prevent any substantial movement so that scratching or other damage to the cap is eliminated. j

A different form of closure is shown in Figs. 6 to 8 inclusive. It is well known in the sealing art that the rolling inward of metal is diflicult due to the fact that the metal must be compressed during the rolling operation. There is a tendency for the metal to wrinkle during the pressing operation, which hinders the rolling and mars the appearance of the cap. On the other hand, this difilculty is not encountered when the free edge of the metal is rolled outwardly because this involves a stretching operation. In Figs. 6 to 8 a blank, for eiia'mple a blank similar to that shown'in Fig. 1, is formed with a wire edge 8 rolled outwardly and set inwardly, as shown in Fig. 6, to a point where it is substantially directly below the depending side of the bead. In other words, the plane of the skirt of the cap passes through substantially the center of the rolled edge. The portion of the wire edge 8 extending inwardly beyond the skirt of the cap forms the lower side of the bead and hence, is a support for the gasket. The sealing operation for applying a cap to the container may be substantially similar to'that shown in Fig. 5 or it may be as shown in Fig. 8. In this case, suitable dies are applied to force the entire bead upwardly and inwardly and the lower portion of the bead downwardly. A slightly greater space between the lower edge of the cap 8 and the sidewall of the container may be allowed, if desired, by reason of the seal. This facilitates removal of the cap and 20 is generally advantageous. In. general practice, the caps are manufactured as described above, stacked upon each other as shown in Fig. 4, after the gaskets have been assembled with the caps and shipped to canners for application to con- 25 tainers. The caps are placed in suitable feeding machines which place the caps on containers as they pass to a sealing machine. The sealing machine constricts the bead of the cap to form a tight hermetic seal, as'shown in Figs. 5 and 9 of 30 the drawing. 7

It will be seen that the present invention provides a construction which may be readily and inexpensively manufactured. Further, it is adapted to form a more secure seal than those heretoas stacked without fear of marring the decorated 4.0

portions thereof. The removal of the caps is facilitated due to the fact that the cap is fully capable of withstanding the concentrated pressure applied by an opening instrument such as a hooked bottle opener. attractive package and is otherwise fully capable of meeting the requirements of the consuming public. 7

'As various changes may be made in the above The cap forms a very 45 embodiment without departing from the spirit 60 of: the invention, all matter herein is to be interpreted as illustrative and not in a limiting sense. Having thus described my invention, I claim: 1. A closure cap comprising a cover portion, a

depending skirt adapted to receive a gasket, a 55 comprising a cover portion, a depending skirt,

and a continuous rolled edge at the bottom of said skirt, said edge being rolled outwardly and bottom'of said skirt, said edge being rolled outwardly and set inwardly with respect to the skirt to form the lower side of said bead and to form a support for the gasket.

5. A closure cap comprising a cover portion and a depending skirt having a bead therein adapted to receive a gasket, a gasket in said bead, and a continuous rolled edge at the bottom of said skirt, said edge being rolled outwardly and set inwardly with respect tothe skirt to form a support for the gasket in said bead, the outer portion of the bead above the rolled edge being substantially cylindrical.

6. A sealed package comprising a container,

a closure cap having a cover portion and a depending skirt, the lower edge of saidskirt being rolled outwardly and set inwardly to form a support for the gasket, and a gasket supported by said rolled edge, said skirt and said inwardly set rolled edge being constricted to force said gasket against the container to form a secure 8. The method of forming a closure cap with an inwardly extending part for supporting a gasket, which method comprises rolling the lowerv edge of the cap outwardly into a rolled edge, and simultaneously setting the entire rolled edge inwardly so that the outwardly rolled edge extends inwardly of the plane of the skirt of the cap to form an inwardly extending projection adapted to support a gasket.

9. The method of forming an article of manufacture comprising a body part closed at one end and open at the other with an inwardly extending part at the open end of the body part, which method comprises rolling the continuous free edge of the body part outwardly into a continuous rolled edge and setting the rolled edge inwardly to form an inwardly extending smooth projection at the open end of the body part.

10. A sealed package comprising, in combination, a container and a closure cap having a cover portion anda. depending skirt, a bead in said skirt adapted to receive-a gasket, the bottom of said skirt being rolled outwardly into a rolled edge, the bottom of said skirt and said rolled edge being set inwardly to support and compress the gasket to form a securely sealed package.

EDGAR SCOFIELD.