US1854451A - Closure for collapsible tubes - Google Patents

Description

April 19, 1932.

F. B. COONEY CLOSURE FOR COLLAPSIBLE TUBES Filed Dec. 13, 1928 37mm/nto@ E101/ d20/Ley,

i Patented pr. 19, 1932 UNITED STATES PATENT OFFICE FRANK B. COONEY, F SANDUSKY, OHIO, ASSIGNOR TO THE AMERICAN CRAYON COM- PAN'Y, 0F SANDUSKY, OHIO, A CORPORATION 0F OHIO CLOSURE FOR COLLAPSIBLE TUBES Application mea December 1a, 192s. serial ne. 325,s57.

The present invention relates to improvei ments 1n closures for collapsible tubes, and

has for an object to provide an' improved complemental cap and neck construction for collapsible tubes, such as the tubes in whlch tooth paste is sold, whereby the tubes at the cap end will be made both gas and l1q u1d tight, reliably avoiding leakage, vwhich 1s a 'common fault with present open mouth tubes.

Another object of the present invention 1s to secure the above results without departing greatly from the standard construction and without entailing the use of special machines .or apparatus for the making of the new device, but to so modify and rearrange the neck and cap construction as to provide a plurality of seals to prevent the entrance of air or the escape of gas, liquid, plastic or viscous material from the interior of the tube.

Although the invention is particularly applicable to the closure constructions of collapsible tubes, it is understood that the invention is not'limited to the same but' may be applied generally to closures whenever' used.

With the foregoing and other objects in view, the invention will be more fully deszribed hereinafter, and will be'more particularly pointedy out in the claims appended hereto. l

- In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

' Figure 1 is a fragmentary longitudinal sec- 1 tion taken through a collapsible tube with the closure in place and illustrating one form of the present invention, and

Figure 2 is a similar viewwith the closure cap removed.- l s y Referring more particularly to the drawings 5 designates a collapsible tube, such as may be pinched to expel the contents when the cap, represented generally at 6,-is removed.

In accordance with the usual construction the tubes are vprovided with .externally threadjed necks andy the caps with' cylindrical, in-

ing the tubes. As leakage "has been of lfre- `quent occurrence. inthe use of lsuch tubes,it-

`is proposed to modify the standard construction in the following respects.

The neck of the container 5 is made of .an inner thickened portion 7 having the external threads 8, and the outer reduced portion 9 forming with the thickened lower portion 7 an annular shoulder 10. At the outer end of the reduced portion 9 of the neck is an inturned flange 11 having a fiat external seat 12 and a beveled internal seat 13 surrounding the entrance openingof the tube or'container 5.

The cap 6 is formed generally of the top --portion 14 and the cylindrical flange. The

internal threads 15 of the flange are shown .as produced in an outer reduced portion-16.

The reduction of the portion takes place internally and provides with the thickened inner wall 17 a shoulder 18 against which is placed an annular gasket 19. The outer edge or -rim 20 of the cylmdrical cap ange against which the gasket 19 seats is preferably plain and unthreaded and under-cut with respect to the threads 15, so that the innermost portion of the threadvwill serve to maintainl the gasket l 19 in place, it being understood that the gasket 19 isA of rubber or some other elastic and compressible materia1,.which may besprung invbehind thethreads 15, whereupon it will expand by its own inherent resiliency out against the wall portion 20 and serve to thereafter retain itself in place. y

A projection 21 is providedv on the cap, such projection extending axially of 'the-cylindrical flange portion and having its support upon the top part 14. The projection 21 is ypreferably rounded and has beveled walls or surfaces designed to come into contact with the-beveled and ground surface 13 of the neck. .The projection 21 is so constructed as to leave an annular space about the projection wherein a secondk elastic and compressible gasket 22 may be .seated against the top portion 14 and the cylindricai flange. l

In other words this gasket 22 is lodged in the corner portion between the wall 17 and the top part 14 of the cap, The cap may have v,a knurled edge ifdesired for facility in rotat- `ing'fit on and ofi' the threads of theneck.

In' the use of the device., vin Figure l, the cap'fis shown as in place." It will-be seen that the gasket 19 is disposed between the shoulder 18 of the cap and the shoulder 10 of the container neck. The gasket is squeezed between these shoulders int e act of rotating the cap 6 g home upon the nec threads 8. It will be apparent that the threads 15 of the cap have easy access to the threads 8 of the neck on account of the cutaway portions at the outer portion of the neck and at the outer portion of the cap.

From an inspection of the drawings, it will be noted that the reduced portion 9 provides a continuously smooth surface between the end seat 12 and the shoulder 10 which marks the place where the raised screw threads 8 commence. By this arrangement, when the cap is removed and when material is being discharged from the tube, the shoulder 10 will prevent any excess material, which passes from the seat 12 onto the reduced portion 9, from reaching the screw threads 8. By this arrangement, therefore, the material is prevented from accumulating in the screw threads so as to effect easy application and removal of the cap. Furthermore, owing to the fact that 'the surface of the'reduced portion 9 is smooth, the material which reaches it inds no anchorage for firm adherence and can be readily wiped off.

' The projection. 21 is shown in Figure as lying within the entrance opening and against the beveled seat 13; and the gasket 22 is shown as engaging the external flat seat 12 of the flange 11, being squeezed against said flange and between the adjacent portions of the cap.

It will thus be apparent that a seal is provided by the engagement of the projection 21 upon the beveled seat 13; a second seal is had by the engagement of the gasket 22 with the seat 12, and a third seal by the presence of the gasket 19 against the shoulder 10. The possibilities of leakage are in this way greatly 'reduced over the' heretofore used form of tube, and to' this extent the lnew* form of closure will effect a great saving to the manufacturers whose products are put out in this form.

Manufacturers are assured that the contents .of suchpackages will reach the consumer without being soiled by leakage.

I have illustrated and described a preferred and satisfactory embodiment of my invention, but it is obvious that changes may be made therein within the spirit and 4scope thereof as defined in the appendedclaims 1. A container including a, neck having an end with a flat seat surrounding a beveled delivery orifice, an exterior seat intermediate the length ofthe neck, a removable closure for the container having two seatsIl therein cooperating respectively with said end flat seat and intermediate seat and disposed opposite thereto, thereb providing two pairs L of opposing seats, an a compressible gasket disposed between each pair of opposing seats,

whereby to provide a double seal and thusl end with a fiat seat surrounding a delivery orifice, an exterior seat intermediate the length of the neck, a removable closure cap for the container having a projecting portion extending inwardly into the delivery orifice, with the exterior of the projecting portion seated against the wall defining the delivery orifice, and two seats in the cap each having a compressible gasket therein, one being disposed about the end seat of the neck and the other disposed opposite the intermediate seat of the neck, whereby a tight fit is formed between said cap and the delivery orifice so that gases or liquids are prevented from' escaping from said container.

3. A Acontainer having a delivery nozzle provided with an external shoulder separating a threaded region and a plainregion, a closure cap for the nozzle having an internal shoulder separating `a threaded region and a plain region, the threaded region of the closure cap screw-threading with the threaded region of the nozzle and the plain region of the closure cap contacting intimately with the plain region of the nozzle, and a compressible sealing washer interposed between the shoulders of the closure cap and nozzle.

4. A container having a delivery nozzle provided with an end seat surrounding a delivery orifice, an external shoulder on the nozzle separating a threaded region and a plain region, a closure cap for the nozzle having a central portion entering the interior of the nozzle and intimately contacting the wall defining the delivery orifice, a cylindrical flange on the closure cap having an 'interna-l shoulder separating a threaded region and a plain region, a compressible sealing washer between the closure cap and end seat of the nozzle, a compressiblesealing washer disposed between the shoulders of the nozzle and cylindrical flange, and the threaded region of the cylindrical flange screw-threading with the threaded region of the nozzle so as .to be` effective in compressing the two Vsealing washers in their respective positions and thus prevent the escape of gas or liquid from the nozzle by reason of the delivery orifice.' e,

5.`In a container having an outlet opening with an internal flange seat and an external flat surface seat about the opening, said container alsolhaving a shoulder stepped -down from the entrance opening and lying in a plane parallel to the plane of the flat surface seat, a closure cap removably engaged with said containerand having a rounded projection extending substantially centrally l der stepped down from said gasket andl adapted to comeopposite the external shoulder of the container in a plane between the plane of the latter and the plane of the iat surface seat, and a compressible gasket mounted between said shoulders.V

T 6. In a collapsible container having a neck with an inner enlarged externally threaded portion and an 4outer reduced unthreaded portion, said neck having an external shoulder between the enlarged and reduced portions, said neck also having an internal flange providing a flat external seat step ed above the shoulderand offset inwardly therefrom, said flange having an internal beveled seat, a removable cap having a top and a cylindrical portion provided with a lower reduced portlon having internal threads to cooperate with the threads of the neck and an upper enlarged portion forming an internal shoulder with the reduced lower portion, a gasketcalfried by the cap againstfsaid shoulder and adapted to seat on the external shoulder of the neck, a projection extending' internally from the top of the cap into the cylindrical portionand adapted to seat against the beveled internal seat of the flange, and a gasket provided with a seat surrounding a delivery orifice, an external shoulder on the nozzle separating a threaded region vand a plain region, a closurecap for 'the nozzle having a central portion entering the interior of the nozzle and intimately contacting the wall defining the delivery orifice, a cylindrical iange on the closure cap having an internal shoulder separating a threaded region and a plaln region, a compressible sealing washer disposedY between the shoulder of the nozzle andacylindrical Range, and the threaded region of the cylindrical flange screw-threading with the threaded region ofthe nozzle so as to be effective in compressing the sealing washer in its respective position and thus prevent the escape of gasv or liquid from the nozzle by reason of the delivery orifice.

In testimony that I claim the foregoing as y invention, and have signed my name hereto.

' FRANK B. COONEY.

surrounding said projection and adapted tothe end orifice, raised screw threads surp rounding said neck and having a shoulder intermediate the length of said neck, the

commencement of said screw threads being spaced a relatively wide distance from the end seat to prevent the `excess material dissl charged over the end seat from reaching the 'v screw threads, and the exterior surface of the neck about the end seat being continuously smooth so as to prevent gathering thereby of the excess material Adischarged over the end seat, and a removable cap provided with internal screw threads to cooperate with the raised screw threads of the neck and having grooves with concentric v gaskets therein, which rest against the end seat and shoulder respectively, the side wall of each of said grooves being shaped to intimately overlie the end seat and shoulder, to eiect a seal with the ca when applied to the neck. g

8. di container having va delivery nozzle

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