US3115284A - Dispensing spout for metallic containers - Google Patents

Description

Dec. 24, 1963 R. w. ANKNEY 3,115,234v

DISPENSING SPQUT FOR METALLIC CONTAINERS Filed July 15, 1957 2 Sheets-Sheet 1 20 FIG. 2

FIG. I

INVENTOR. ROBERT w. ANKNEY BY I a,

ATTORNEY III" Dec. 24, 1963 R. w. ANKNEY DISPENSING SPOUT FOR METALLIC CONTAINERS 2 Shets-Sheet 2 Filed July 15, 1957 FIG. 4

IIO

FIG'.6

INVENT OR. ROBERT W. ANKNEY ATTORNEY United States Patent 3,115,284 DISPENSING SPOUT FOR METALLIC CONTAINERS Robert W. Ankney, Redford, Ohio The Ankney C0., 8007 Grand Ave., Cleveland 4, Ohio) Filed July 15, 1957, Ser. No. 671,846 11 Claims. (Cl. 222566) This invention pertains to the art of fastening plastic articles to metal and more particularly to fastening a plastic sleeve in an opening in sheet metal in such manner that a sealed joint is obtained there-between.

This application is a continuation-in-part of my copending application Serial No. 640,757, filed February 18, 1957, now abandoned.

The invention is particularly applicable to the fastening of dispensing spouts in sheet metal containers, particularly when containing detergents or other corrosive liquids or the like, and will be described with particular reference thereto, although it will be appreciated that the invention has broader applications and may be used generally whenever a plastic sleeve must be securely fastened in an opening in sheet metal.

In the art of manufacturing containers for detergents, it has heretofore been conventional to assemble the pouring spout with an end of the container and then assemble the end with the other parts of the container. This was necessary since the spout in heretofore designs had to be inserted in the opening in the end of the container from the side thereof which would be on the inside of the completed container. The protruding pouring spout on the container end made the end difiicult to handle in a very high production assembly line operation. Further, it required filling the container through the pouring spout, thus making the filling operation not only more difficult because of the problem of aligning the filling nozzle with the opening in the pouring spout, but also more time consuming because the rate of fill due to the restricted area of the dispensing spout opening was considerably reduced. In a single filling machine where 500,000 cans might be filled in one day, split fractions of a second can make a substantial difference in the overall production.

The present invention contemplates a filling spout which may be assembled with a container after the container has been filled.

Another problem with metallic containers with plastic spouts and corrosive materials such as detergents has been the corrosion of the metal container adjacent the edge of the opening in which the spout is inserted. Ordinarily the metal containers have a corrosion resistant coating on the inside. However, the opening for the dispensing spout is ordinarily formed after the metal is coated with a corrosion resistant protective coating. The forming of this opening ruptures the protective coating and exposes the metal around the opening to corrosive action. Heretofore, to protect the edges of the opening, various means have been provided to hold the base of the spout in sealing engagement with the inner surface of the container. Some of these have been successful to a greater or lesser degree but have always necessitated that the dispensing spout be inserted into the container opening from the side which will be on the inside of the completed container.

The present invention contemplates a pouring spout which can be inserted in the container opening from the outside and which will protect any ruptures which might exist in the protective coating surrounding the opening from the corrosive action of the container contents.

A still further difliculty which in some respects was emphasized by the above referred to patent application was the maintenance of sufficiently high pressures be- 3,115,284 Patented Dec. 24, 1963 tween the plastic spout and the metal container so that a high torque was required to turn the spout relative to the container. The plastics normally employed for pouring spouts have a tendency to cold flow under pressure with the result that the torque required to turn the spout relative to the container became progressively less. If the container was heated at all to elevated temperatures, the problem became particularly severe.

The present invention contemplates a pouring spout arrangement which maintains a uniformly high turning torque over a long period of time.

In accordance with the present invention, the container end or side has an opening into which the pouring spout is to be inserted which is defined by an out-turned flange. The pouring spout is comprised of a sleeve of pliable material having a portion with outer dimensions so as to fit snugly within the out-turned flange and having an inwardly facing shoulder to position the portion longitudinally within the flange or opening. The pouring spout has a longitudinally extending passage restricted slightly by a shoulder generally close to or aligned with the plane of the inner surface of the container. A rigid ferrule having outer dimensions generally equal to the inner dimensions of the pouring spout passage is then inserted longitudinally therein and towards the interior of the can until it moves past the shoulder. As the ferrule moves past the shoulder, the pouring spout is forced outwardly so as to form a rigidly held bead of larger dimension than the container opening which bead bears against the inner surface of the container around the opening and retains the pouring spout in position with a sealed joint therebetween. The friction between the outer surface of the ferrule and the inner surface of the pouring spout retains the ferrule in assembled position.

Further in accordance with the invention, the container opening is provided with at least two major dimensions and may thus be in the shape of an ellipse or polygonal shaped figure such as a triangle, rectangle or the like with the corners of such polygonal shaped figure being arcuate. The portion of the spout which fits into the container opening has a like shape.

Preferably, although not necessarily, the spout passage at least opposite the portion which will fit within the container flange and the rigid ferrule also has a simi lar shape. Further preferably, the larger dimension of the ferrule is greater than the minimum dimension of the container opening.

Further in accordance with the invention, the inner end of the portion within the out-turned flange has an outwardly facing sharp corner which when the passage shoulder is forced outwardly, is forced into pressure sealing engagement with the inner surface of the container end.

The principal object of the invention is the provision of a new and improved arrangement for fastening a pliant sleeve in an opening in sheet metal which is simple in construction, economical to manufacture, is readily assembled and maintains its resistance against turning over long periods of time.

Another object of the invention is the provision of a new and improved plastic pouring spout which may be assembled With a container after the container has been filled.

Another object of the invention is the new and improved dispensing spout for containers which provides an eifective seal around the edges of the opening in the container so as to prevent corrosive fluids in the container from coming into contact with the edges of the pouring spout opening.

Another object of the invention is the provision of a new and improved pouring spout arrangement for metal lic containers wherein as the inner end of the pouring spout is forced outwardly to prevent removal of the pouring spout, a sharp corner on the pouring spout comes into sealing engagement with the inner surface of the container spaced from the edges of the pouring spout opening.

The invention may take physical form in certain parts and arrangements of parts, the preferred embodiment of which will be described in detail in this specification and illustrated in the accompanying drawings which form a part hereof and wherein:

FIGURE 1 is a side cross-sectional view of the cover of a container with a dispensing spout assembled therewith and illustrating an embodiment of the invention;

FIGURE 2 is a fragmentary view of FIGURE 1, but showing the parts in exploded view before assembly; and,

FIGURE 3 is a view similar to FIGURE 2, but showing an alternative embodiment of the invention;

FIGURE 4 is a view similar to FIGURE 1, but illustrating the preferred embodiment of the invention;

FIGURE 5 is a fragmentary exploded view of FIGURE 1 showing the parts before assembly; and,

FIGURE 6 is a cross-sectional view of FIGURE 4 taken approximately on the line 66 thereof.

Referring now to the drawings wherein the showings are for the purposes of illustrating a preferred embodiment of the invention only and not for the purposes of limiting same, the figures show a container wall or end 11) having an opening 11 defined by an out-turned flange 12 in which a pouring spout 13 is positioned and held in place by a ferrule 14. A cap 15, which forms no part of the present invention, is screwed over the outer end of the spout 13 to close the same.

The end may be formed of any desired material, but normally is formed of sheet steel having a coating on the inner surface thereof so as to protect the steel from the corrosive action of materials, not shown, to be dispensed from the container. The out-turned flange 12 is formed in a conventional manner such as by stamping and drawing presses. It will be noted that the flange 12 joins the end 10 at a relatively sharp corner 21 and the formation of this sharp corner sometimes tends to rupture the coating 20 at the apex 22 of the bend. It is at this point of rupture that the materials on the inside of the container can contact the metal of the end 10 and cause the same to rust or corrode unless this point of rupture is protected in accordance with the present in vention.

The pouring spout 13 has an outer end or portion of any desired form or shape which extends beyond the free outer or upper end 12a of the flange 12, and has an inner or lower portion 24 having an outer diameter generally equal to the inner diameter of the flange 12 and this opening 11. When the spout 13 is inserted in the opening, the outer surface of the portion 24 will fit snugly against the inner surface of the flange 12. The spout 13 has a shoulder 25 bearing against the free or upper end 12a of the flange 12 to axially locate the spout 13 therein and in the opening 11. The lowermost part of the portion 24 is chamfered as at 26 so as to facilitate the insertion of the portion 24 in the opening 11. The outer surface of the portion 24 is provided with a circumferentially extending groove 27 located a distance from the shoulder 25 and between the shoulder 25 and the chamber 26 so as to be located generally in the plane of the inner or lower surface of the end 10 when the spout 13 is assembled with the end 10. The groove 27 provides a dual function, namely of providing a thin web portion 36, thus making the lower end of the portion 24 flexible or pivotal relative to the upper portions of the portion 24, and additionally the surface of the groove 27 intersects with the outer surface 24 so as to form a sharp corner 29 for reasons which will appear hereinafter.

With the arrangement as described, when the spout 13 is assembled in the opening 11, the shoulder 25 bears against the upper edge 12. The groove 27 is located generally in the plane of the inner surface of the end 10.

4 The outer surface of the portion 24 bears with a slight pressure against the inner surface of the flange 10, but not with suflicient pressure to hold the pouring spout in position, nor to provide the sealing action desired.

It is to be noted that the pouring spout 13 is preferably of a pliant material and in preferred embodiments of the invention is made from a molded polyethylene plastic material. This material, as it is known, has a capability of substantially deforming under pressure and a capability so as to return from the deformation to its original shape when the pressure is removed.

The pouring spout 13 has a passage therethrough slightly restricted at its lower end by an inwardly and downwardly tapered shoulder 30 which is engaged and moved outwardly by the ferrule 14 as the ferrule is inserted. This causes the lower or inner end of the spout 13 to be deflected radially outwardly to bring the corner 29 into sealing engagement with the inner surface of the end 11) at a location radially outwardly from the apex 22 and opening 11.

The ferrule 14 is generally in the form of a cylinder of relatively rigid material and has an outer diameter generally equal to the inner diameter of the spout 13. The ferrule 14 has a downwardly and inwardly beveled lower corner 32 as indicated. Normally the upper corner of the ferrule 14 will likewise be beveled as at 33 so that the ferrule may be assembled with the pouring spout 13 and without regards to which end is inserted first into the spout.

After the pouring spout 13 is positioned in the flange 12 and thus the opening 11, the ferrule 14 is then forced axially inwardly to the position shown in FIGURE 1. As the ferrule 14 is forced inwardly, the bevel 32 contacts the annular shoulder 33 and forces it radially outwardly. The lower end of the SPOIllt 13 pivots around the thin web portion 36 formed by the groove 27 so that the corner 29 moves into contact with the inner surface of the container end 10.

In accordance with the invention, the corner 29 must engage the inner surface of the end 10 radially outwardly of the point 22 so as to cover any ruptures at this point 22 and in the coating 20. Corner 29 must be sharp so that a high unit pressure results. This high unit pressure prevents the contents of the container from flowing there past so as to come into contact with the sheet steel of the end 10 through any possible rupture in the coating or film 20 at the point 22.

The angle of the bevel 32 and the angle of the shoulder 30 as well as its radial thickness from the inner surface of the spout 13 are all adjusted in relation to the ability of the container end 10 to withstand an axial force with out collapsing or bending. As the angle A of the bevel 32 is increased, obviously this pressure will increase. The angle A, in accordance with the preferred embodiment, may have a value of between 30 to 45.

In a like manner, .the angle B of the shoulder 30 may be as :desired, and as this angle increases, less and less axial force is required. It is preferred, however, that the bevel 32 contact the shoulder 30 at a point close to its minimum diameter. In order to assure this, the angle B should always be greater than the angle A. Preferably the angle A is 30 and the angle B is 45, although obviously these angles may be varied from those stated. With such angles, generally the maximum deformation may be obtained using a minimum axial force on the ferrule. The axial force may then be adjusted by adjusting the radial thickened portion formed by the shoulder 30. The radial thickness of this portion to some extent determines the radial outward movement of the shoulder 29. It is desirable that this shoulder move outwardly as far as possible to assure that any rupture in the coating 20 shall be completely sealed from the contents of the container by the sealing engagement of the corner 29 with the inner surface of the container end 10.

FIGURE 3 shows an alternative embodiment of the invention which assists in having the corner 29 engage the inner surface of the end 10 at the maximum radial distance from the center-line of the opening 11. in FIG- URE 3, the spout 13' has a portion 40 below the groove 27' of an outer diameter slightly greater than the diameter of the portion 24' above the groove 27 and a diameter slightly greater than the diameter of the opening 11. With the arrangements shown in FIGURES l and 2, the spout 13 may be inserted in the opening 11 with substantially no axial force. With the arrangement shown in FIGURE 3, the spout 13' must have an appreciable axial force exerted thereon so as to force the spout into the opening 11. This force is less than the force required to collapse the end. However, once the spout 13 is inserted into the opening 11, it will be noted that the corner 29 is radially outward from the inner surface of the flange 12. Thus, the radial thickness of the portion formed by the shoulder 30' may be less than that shown in the FIGURE 2 in order to have the :corner 29 engage at the same point on the inner surface of the end 10. With this reduced radial thickness, less axial pressure will be required to force the ferrule 14 into position. As the force to push the spout 13 into the opening 11 and the force to push the ferrule 14 into the spout 13 are both exerted at different times, it will be seen that the arrangement of FIGURE 3 permits the same sealing action of FIGURES 1 and 2 to be obtained with the same total force, but with a lesser maximum force. Alternately, a greater sealing action can be obtained with a greater total force, but the same maximum axial force.

The above described embodiments have proven quite satisfactory in practice with a single exception. Thus it was found that the portion 24 which was under pressure between the flange 12 and the ferrule 14 tended to cold flow so as to reduce this pressure with the result that the frictional force between the portion 24 and the flange 12 was substantially reduced. Thus after a period of time the torque required to turn the spout relative to the top then was substantially reduced. The effect became quite pronounced when the tops were heated to elevated temperatures for even short periods of time.

The embodiments of the invention shown in FIGURES 4, 5 and 6 incorporate generally the principles of the embodiments shown in FIGURES 13, but in addition, have the feature that they have a uniformly high resistance against turning and the effects of 'cold flow plastic will not adversely affect such characteristics.

Thus in the embodiment of the invention shown in FIGURES 4 and 5, the container end 110 has an opening 111 which is generally rectangular in shape and is defined by an upwardly or outwardly turned flange 112 which flange may be said to have generally parallel sides and arcuate corners. The portion 124 of the spout 113 which fits within the opening 111 defined by the flange 112, has an external shape identical to the shape of the opening 111. Thus when the spout 113 is positioned within the opening 111, the outer surfaces of the portion 124 will generally be in firm engagement with the inner surfaces of the flange 112. I

Immediately below the lower end of the portion 124, the spout 113 has an outwardly extending portion 140 having a sharp corner 141, the plane of this corner being in the lower plane of the top 110. The inner surface of the spout 113 has a similar rectangular shape to that of the opening 111 and is restricted at its lower end by means of a shoulder 130, the upper plane of which is generally in the plane of the inner surface of the top 110. The ferrule 114 likewise has a rectangular shape with arcuate corners and when inserted in the spout 113 engages the shoulder 130 to force it sidewardly and force the point 141 into sealing engagement with the inner surface of the top 110 sidewardly of the corner 112.

It will be appreciated that with the shape of the opening 111 shown and the rigid ferrule 114 of a similar shape, greatly increased torques will be required to turn the spout relative to the container. In this respect, it is preferred that the outer diagonal of the ferrule 114 be greater than the minimum transverse dimension of the opening 111.

It will (also be appreciated that other shapes of openings 111 could be employed, the important thing being that the opening have a major and a minor dimension. Such other shapes meeting these requirements would be ellipses or other polygonal shapes. In all instances of polygonal shapes it is preferred that the sides be joined by arcuate corners.

It should also be appreciated that in some instances it is possible that the inner surface of the spout be generally circular and that the ferrule also be circular, the difference in the spacings between the walls of the ferrule and of the flange 112 being taken up by a variation in the dimensions of the portion 124. It is preferred, however, that the portion 124 have a uniform thickness around the entire periphery.

It is also to be noted that in this embodiment of the invention, the groove 27 is not employed. There is thus a maximum amount of material between the ferrule 114 and the plane of the top 110. It is to be further noted that any torque on the spout is transmitted to the top in the plane of the top which, as will be obvious, is the strongest portion thereof.

Referring now to FIGURE 4, at the upper end of the spout 113 and on the inner surface, a small shoulder 142 is provided Which serves the function of preventing the ferrule 114 from shaking out of the spout 113 during shipment and before assembly of the spout 113 with a container. Following such assembly, the frictional engagement between the ferrule 114 and the spout 113 is sufficient to retain the ferrule in place.

In this embodiment of the invention, the ferrule 114 preferably extends upwardly so as to provide a backing behind the threads 144.

It is to be noted that the present invention embodies the principles of my co-pending patent application Serial No. 618,955, filed October 29, 1956.

The present invention differs from the invention of that application in the use of the groove 27 and the shoulder 30. The advantages of the ferrule 14 as described in that application are likewise present herein; namely, of a stronger fit into the opening 11 as well as the radial sup port for the threads used to fasten the cap 15 onto the pouring spout 13. These advantages become particularly apparent when it is realized that a round thread may be employed as distinguished from a square thread. Round threads, as illustrated in the present drawings, may be stripped from a solid mold whereas when square threads are employed, a split mold must be used.

It will thus be seen that embodiments of the invention have been described which accomplish all the objects heretofore set forth and others, and that arrangements for fastening a dispensing spout to a container have been provided which are simple in construction, are easily assembled with a can after the can itself has been assembled and filled, and which provide a highly effective sealmg action.

Obviously, modifications and alterations will occur to others upon reading and understanding of the above description. It is my intention to include all such modifications and alterations insofar as they come within the scope of the present invention.

Having thus described my invention, I claim:

1. In combination, a container wall provided with an upturned flange defining an opening, and a flexible plastic dispensing spout mounted in said opening and defining a passage therethrough, said spout including a portion of a longitudinal length longer than said flange and having a shoulder engaging the end of said flange, said spout passage having a radially inwardly extending shoulder below the plane of said wall, and means in said passage transversely expanding said inwardly extending shoulder and 7 the corresponding outer surface of said spout to retain said spout in said opening, said expanding means defining a passage for passing material therethrough.

2. A container wall having an opening therethrough and a dispensing spout in combination therewith, said container wall having an underside surface and an upturned flange having an upwardly facing surface and defining said opening, said spout being comprised of a portion of a longitudinal length longer than said flange disposed in the confines of said opening and having a downwardly facing surface engaging said upwardly facing surface, and an inner shoulder at the other end of said portion, said portion having a groove in the outer surface opposite to the underside surface of said wall, and a ferrule of an outer dimension substantially equal to the inner dimensions of said spout engaging said shoulder and expanding it outwardly to push the lower end of said portion into engagement with said underside surface of said wall.

3. A container wall and dispensing spout in combination, said wall having an upturned flange defining an opening in which said spout is mounted, said spout being formed of a flexible plastic material and having a cylindrical portion of an outer dimension equal to an inner dimension of said flange and a longitudinal length greater than said flange, a transversely outwardly extending shoulder on said spout engaging the outer end of said flange, a groove in the outer surface of said portion generally in the plane of said wall and forming at its lower edge a sharp corner with the outer surface of said portion, a downwardly and inwardly tapering shoulder on the inner surface of said spout below said groove, and a rigid ferrule of an outer dimension generally equal to the inner dimension of said spout above said shoulder, said ferrule having its outer surface terminating in a downwardly and inwardly extending shoulder to engage the inwardly tapering shoulder of the spout to expand the same outwardly to force said sharp corner into sealing engagement with the underside of said wall when the ferrule is inserted in the spout.

4. A dispensing spout adapted to be inserted in an opening of a container wall having an upturned flange defining a cylindrical opening, said spout being formed of a flexible plastic material and having a portion of an outer dimension generally equal to the inner dimension of said flange and adapted to be disposed in said opening, said spout having a shoulder at one end of said portion adapted to engage the outer end of said flange, said portion having a groove in its outer surface spaced from said shoulder a distance equal to the length of said flange and intersecting the outer surface of said portion to form a sharp corner, a shoulder on the inner surface of said spout at the lower end thereof below said groove, and means for expanding said shoulder outwardly, said expanding means defining a passage for passing material therethrough.

5. A dispensing spout adapted to be assembled with a container wall having an upturned flange defining an opening, said spout being comprised of a portion of outer dimensions substantially corresponding and equal to the inner dimensions of said flange, said portion having a downwardly facing surface adapted to engage an upwardly facing surface of said flange, said portion having a groove at the lower end spaced from said downwardly facing surface a distance substantially equal to the length of said flange from the wall to said upwardly facing surface on the flange, said portion below said groove having an outer dimension slightly greater than the dimension of said portion above said groove, said groove intersecting the outer surface of said portion to form a sharp corner for engagement with the underside of said container wall, said spout having on the inner surface thereof a downwardly and inwardly tapering shoulder below said groove and adapted to be expanded radially outwardly by means 8 of a ferrule of rigid material inserted axially through said spout.

6. A flexible plastic dispensing spout adapted to be mounted in an opening of a container wall defined by an upturned flange having an upwardly facing surface, said wall having a downwardly facing surface, said spout be ing generally in the shape of a sleeve having inner and outer surfaces and an upper and lower end, the lower end of said spout being of an outer dimension such that it may be inserted through said opening, said outer surface including a downwardly facing portion adapted to engage the upwardly facing surface of said flange and position said spout in said opening with a portion extending below the under surface of said wall, and an inwardly and downwardly tapering shoulder on the inner surface of said spout opposite said last-mentioned portion, and a rigid ferrule of an outer dimension greater than the inner dimension of said portion adapted to engage the same and force said portion outwardly so that the outer surface thereof engages the underside of the wall.

7. A flexible plastic dispensing spout adapted to be mounted in an opening of a container wall defined by an upturned flange, said spout being generally in the shape of a sleeve having inner and outer surfaces and an upper and lower end, the lower end of said spout being of an outer dimension such that it may be inserted through said opening, said outer surface including a portion adapted to engage said flange and position said spout in said opening with a portion extending below the underside of said wall, and an inwardly extending shoulder on the inner surface of said spout opposite said last-mentioned por tion, and a rigid ferrule of an outer dimension greater than the inner dimension of said last-mentioned portion adapted to engage said shoulder and force said last-mentioned portion outwardly so that the outer surface thereof engages the underside of the wall.

8. The combination of a container wall provided with an upturned flange defining an opening, and a dispensing spout mounted therein having a passage therethrough, said spout being formed of a flexible plastic material and including a portion of dimensions substantially equal to the inner dimensions of said flange and having a snug fit inside said flange, said spout at its lower end having a portion disposed below the underside of said wall, said spout at the lower end of said passage having a transverse inwardly extending shoulder, and a rigid ferrule in said passage engaging said shoulder and forcing said last-mentioned portion of the spout transversely outwardly to engage the underside of said wall.

9. The combination of claim 8 wherein said last-mentioned portion of the spout defines an upwardly facing sharp corner which is in pressure engagement with the underside of said wall completely around said opening.

10. The combination of claim 8 wherein said opening in the container wall is non-circular, and said first-mentioned portion of the spout which fits inside the flange is non-circular in cross-section so that turning of the spout in said opening is prevented.

11. The combination of claim 10 wherein said flange defines an upwardly facing surface, and said spout has a downwardly facing shoulder which engages said upwardly facing surface on the flange, and said spout has a laterally outwardly protruding shoulder which is disposed subs'tantially in the plane of the underside of said wall and which is maintained in pressure engagement with the underside of the wall by said ferrule in the spout passage.

References Cited in the file of this patent UNITED STATES PATENTS 1,430,552 I-Iothersall Oct. 3, 1922 2,098,128 Bailey Nov. 2, 1937 2,560,776 Peters July 17, 1951 2,844,289 Ogren July 22, 1958

Claims (1)

1. 2. A CONTAINER WALL HAVING AN OPENING THERETHROUGH AND A DISPENSING SPOUT IN COMBINATION THEREWITH, SAID CONTAINER WALL HAVING AN UNDERSIDE SURFACE AND AN UPTURNED FLANGE HAVING AN UPWARDLY FACING SURFACE AND DEFINING SAID OPENING, SAID SPOUT BEING COMPRISED OF A PORTION OF A LONGITUDINAL LENGTH LONGER THAN SAID FLANGE DISPOSED IN THE CONFINES OF SAID OPENING AND HAVING A DOWNWARDLY FACING SURFACE ENGAGING SAID UPWARDLY FACING SURFACE, AND AN INNER SHOULDER AT THE OTHER END OF SAID PORTION, SAID PORTION HAVING A GROOVE IN THE OUTER SURFACE OPPOSITE TO THE UNDERSIDE SURFACE OF SAID WALL, AND A FERRULE OF AN OUTER DIMENSION SUBSTANTIALLY EQUAL TO THE INNER DIMENSIONS OF SAID SPOUT ENGAGING SAID SHOULDER AND EXPANDING IT OUTWARDLY TO PUSH THE LOWER END OF SAID PORTION INTO ENGAGEMENT WITH SAID UNDERSIDE SURFACE OF SAID WALL.

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