US1943314A - Captive screw cap for cans - Google Patents

Description

an -6, 1934 J. M. HOTHERSALL 1,943,314

CAPTIVE SCREW CAP FOR CANS Filed May 8, 1931 6'. ATTORNE l atented Jan. 16 1934 UNITED STATES PATENT OFFICE CAPTIVE SCREW CAP FOR CANS Application May 8, 1931. Serial No. 535,992

Claims.

The present invention relates to screw caps and nozzles for containers, and has for its object the improvement and simplification of their construction. Such nozzles and caps are typically 5 provided for the purpose of venting containers to facilitate the pouring out of the liquid content through a separate nozzle or pouring opening, to the end that vacuum may not be created within the container by reduction of its liquid content in the pouring. In practice, it is only necessary that the captive screw cap on the venting nozzle be loosened and turned suificiently to admit air to replace the dispensed liquid content.

The principal object of the present invention is the provision of a captive screw cap of simplified construction and one which, while being permanently retained on the venting nozzle, may be readily loosened and turned to permit admission of the necessary air.

The invention has for a further object the provision of a captive screw cap of the general character above described, which maybe readily manufactured and assembled in permanent attachment to the nozzle.

A further and important object of the invention is the provision of a captive screw cap of easy and certain operation and which when in closed position will tightly seal the opening through the venting nozzle.

Numerous other objects of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawing, discloses a preferred embodiment thereof.

Referring to the drawing:

Figure 1 is a perspective view of a container having a nozzle and a captive cap, the container and cap parts being shown in separated position prior to assembly;

Fig. 2 is a bottom plan view of the captive cap after it has been formed to prevent removal from the container part;

Fig. 3 is an enlarged cross sectional view through the container nozzle showing its screw 4o -cap in closed position; and

Fig. 4 is a view similar to Fig. 3 illustrating the cap unscrewed but retained in place on the nozzle. For the purpose of illustrating the invention,

a captive screw cap of the shape illustrated is 50 applied to a vent nozzle of a container. Such a container may be of the kind commonly used for olive oil, varnish, etc. and may be provided with a pouring spout in addition to its vent nozzle, the vent when opened to atmosphere permitting 5. pouring of the contents from the container. This container comprises a container body 11 provided with an end 12 which may be secured thereto in any suitable and well known manner, as by a double seam 13. The end 12 may be provided with a pouring neck or spout 14 to permit dispensing of liquid contents from the container.

The end 12 is also provided with a nozzle 15 preferably secured to the end 12 by a crimped joint 16. The nozzle 15 is formed as a cylindrical body wall 17 in which interrupted threads 18 are pressed out or beaded, the upper end of this wall 17 being bent inwardly to provide a horizontal shoulder 19 extending all around and enclosing a central opening 21.

A cap 25 is provided for closing the opening 21 of the nozzle 15 and this cap is preferably formed with a cylindrical wall 26 and an imperforate end wall 27. Interrupted threads or sections of threads 28 are formed in the cap by being struck inwardly at an angle as best illustrated in Fig. 1. A sealing gasket is provided, this being preferably an annulus 29 of cork or other suitable material and this gasket is preferably retained in the cap 25 as illustrated in Fig. 4. The cylindrical wall 26 of the cap 25 is extended downwardly at spaced intervals to provide lugs 31 which project beyond the remaining edge of the wall.

The cap 25 formed as in Fig. 1 but with its gasket 29 in position is initially assembled on the nozzle 15, its interrupted threads 28 resting upon the threads 18 of the nozzle (Fig. 4) When in this position the lugs 31 are bent inwardly thus completing the formation of the cap and thereby providing stops 32 for preventing removal of the cap from the nozzle. As the cap 25 is rotated in one direction on the nozzle 15, its threads 28 cooperate with the threads 18 of the latter and draw the cap downwardly and clamp its gasket 29 on the shouldered wall 19 of the nozzle. This action seals the opening 21 against any entrance of air. The pouring spout 14 of the container may be suitably closed after the container has been filled with its contents this conveniently being done by a stopper or in other suitable manner.

When it is desired to pour the contents of the container 11 through the spout 14, the cap 25 is unscrewed by partial rotation on the nozzle 15 and its threads 28 cooperating with the threads 18 of the nozzle lift the cap removing the sealing gasket 29 from the wall 19. This partial rotation of the cap is only through a few degrees or until the lugs 32 engage beneath the thread parts 18 of the nozzle 15 (Fig. 4.). Further rotation is then impossible, the threads of the nozzle forming an obstruction for the stop lugs 32. The vent is then open and air may enter around and between the threads of the cap and nozzle and into the container 11 permitting easy removal of its contents through the pouring spout 14, the stopper having been removed.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the in vention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A container having a pouring spout, and an air-admission nozzle provided with a captive screw cap, comprising a cylindrical body having threads formed in its side walls, the outer edge of said walls being extended at spaced intervals as lugs which are adapted to be bent inwardly, after the cap has been engaged with a container, to provide stops, the said nozzle being provided with threads under which said stops engage and prevent displacement of the cap from said container when it is partially unscrewed therefrom.

2. A container having a pouring spout, and an air admission nozzle provided with a captive screw cap, comprising a cylindrical body having an imperforate end wall and having threads .formed in its side walls, the outer edge of said walls being extended at spaced intervals as lugs which are adapted to be bent inwardly, after the cap has been engaged with a container, to

provide stops, the said nozzle being provided with threads under which said stops engage and prevent displacement of the cap from said container when it is partially unscrewed therefrom, and a sealing medium applied to the said cap imperforate end waH and clamped into sealing engagement with said container by the threaded engagement between said container and cap.

3. A captive screw cap container, comprising a container part for admission of air into said container and having threads formed therein, and a cap having a body wall provided with threads for cooperative engagement with said container threads to efiect a closure, said cap body wall extending at spaced intervals as lugs which are adapted to be bent inwardly as stops which strike against the said container threads and prevent removal of said cap from said container when the former is unscrewed to open the closure, said container having a pouring spout.

4. A captive screw cap container, having a pouring spout and comprising a container part for admission of air and having threads formed therein, and a cap having a body wall provided with threads for cooperative engagement with said container threads to effect a closure, said cap body wall having inwardly extending lugs which form stops and which strike against the said container threads and prevent removal of the said cap from said container when the former is unscrewed to open the closure.

5. A captive screw cap container, comprising a container body, an end secured to said body having a pouring spout, a nozzle secured to said end and adapted to admit air into the container and having threads formed.- therein, and a cap having a body wall provided with threads for cooperative engagement with said nozzle threads to effect a closure of said container, a gasket carried by said cap and clamped on to said nozzle when the cap is in closing position to provide an air tight seal, and lugs formed integrally with said cap for preventing removal thereof from said nozzle while permitting partial opening of said closure.

JOHN M. HOTHERSALL.

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