In certain specialized applications, funnels have been developed which have a screw-on bottom for use with threaded containers.

We have noted that in the case of bottled potable water, many persons desire to carry bottles with them to provide sanitary water at any time. Commonly, 0.5, 1.0, 1.5 and 2.0 liter bottles are favored because they usually provide sufficient water for an individual and are easily transported.

Unfortunately, the smaller bottles of the 0.5, 1.0 and 1.5 liter size and even those of the 2.0 liter size, when potable drinking water is purchased, are quite expensive compared with the typical five-gallon bottle. In certain cases, one may want to fill one of the smaller bottles from the larger container without spillage and then replace a screw-on or dispenser cap.

The same is true if a bottle is filled from another water source.

BRIEF DESCRIPTION OF THE INVENTION With this state of the art in mind, we devised a screw-on, a snap-on funnel and a pressure fit funnel which are capable of reliable use on at least five different sizes and various fill opening styles of bottles. We have also developed designs which are subject to manufacture either by blow molding or by injection molding. We have also developed variations of our funnel in which there is positive sealing of the fluid from the exterior of the bottle or container during filling so that no liquid can leak out over the bottle engaging portions.

Basically, our funnel includes a tapered receiver portion which preferably is in the 2 to 4 inch diameter in size narrowing down to a smaller fluid delivery throat. At the throat of the funnel there are two sets of internal threads with the inner set of threads corresponding to the smaller size container, e.g., 0.5 to 2.0 liter size, and the larger thread adapted to fill larger fill opening bottles, e.g., 1.0 liter or one gallon bottles. In using the funnel with a smaller bottle, the outer threaded portion acts as a guide in directing the funnel over the neck of the smaller bottle. This is helpful since the threaded inner portion is not directly visible while the smaller bottle is to be filled.

Certain types of bottles include snap-on lids without threaded connections. We have found that our specialized funnels can serve the needs to carefully fill such bottles, as well.

This is accomplished in two ways. First, our threaded discharge openings will engage bottle or other container openings which have an outside diameter which approximates the peaks of the internal threads. Secondly, a relatively straight sided non threaded discharge opening will engage and apply force or pressure against the exterior of the container neck sufficient to hold the funnel securely on the container. Those may be either single or multiple stage snap-on funnels.

In another embodiment, the funnel is not threaded but is slightly resilient and the resiliency provides engagement with the threads or the exterior of the bottle neck.

In additional embodiments, the throat of the funnel includes a downward extending secondary funnel which extends into the full opening of a bottle to be filled and therefore aligns a sealing lip as well as directing all fluids well below the opening of the neck of the bottle being filled. The secondary funnel is short enough that it does not extend below the bottle neck.

Another factor in the design and production of funnels is the method by which the funnel is manufactured. A form of manufacturing which produces good quality products and at relatively low cost is blow molding which is used often for the production of bottles. It is significantly less expensive than injection molding which allows for more precise shapes but encounters substantial tooling costs.

We have found that it is possible to make adequate threads to engage the bottle top employing blow molding of our design.

Therefore, the blow mold version of this invention is preferred.

On the other hand, where we need precise fitting or the secondary funnel, the injection mold version is the preferred option.

In the case of the blow molded version of this invention, either the larger or smaller discharge portion may be used or a double threaded discharge portion can be present. In the blow molded version, the secondary funnel is not compatible with the blow molded technique so it is reduced to a smaller protruding lip.

In the non threaded embodiments either blow molding or injection molding may be used.

BRIEF DESCRIPTION OF THE DRAWING This invention may be more clearly understood with the following detailed description and by reference to the drawings in which: Fig. 1 is a perspective view of one embodiment of this invention; Fig. 2 is a side elevational view of the embodiment of Fig.

1; Fig. 3 is a diametrical sectional view of the embodiment of Figs. 1 and 2 taken along line 3-3 of Fig. 2; Fig. 4 is an enlarged fragmentary side elevational view of the embodiment of Figs. 1-3 showing particularly the bottle attachment lower end of the funnel of this invention; Fig. 5 is a diametrical sectional view of an alternate embodiment of this invention designed particularly for blow molding production; Fig. 6 is a perspective view of a funnel embodiment designed for non threaded engagement with the necks of two sizes of bottles; Fig. 7 is a diametrical sectional view of the embodiment type shown in Fig. 6; Fig. 8 is a perspective view of a single size neck opening funnel with leakage protection; Fig. 9 is a diametrical sectional view of a slip fit engagement embodiment of Fig. 8 designed for use with one size of either threaded or non threaded bottle opening; and Fig. 10 is a perspective view of a single neck opening funnel designed particularly for blow molding production.

DETAILED DESCRIPTION OF THE INVENTION Now referring to the drawing Figs. 1-3, a funnel of this invention may be seen ready for installation on the fill opening of a conventional 0.5 to 2.0 liter or larger water container having either a 28 or 38 mm OD (outside dimension) filling opening. The funnel, generally designated 10, is a unitary plastic form of such material as polyvinyl chloride or the like which may be formed either by injection molding or blow molding.

The version of Figs. 1-3 comprises a body portion 11 with its fill opening unshown but designated 12 at its upper rim 13. A handle 14 is shown integrally molded as a part of the funnel 10 at one side of the rim 13 and actually as a side extension of the rim. The handle 14 includes a depending tab 15 which may be used for holding with one or two fingers located below the handle 14 to provide a secure grasp when filling the bottle, unshown in Fig. 1 and except for its neck regions N and NL for larger bottles, shown in phantom, in Fig. 2.

The funnel 10 includes a tapered portion 16 as is conventional with a conventional discharge opening 0, best seen in Fig. 3 at the bottom of the conical tapered portion 16. A small portion of the discharge opening 0 appears in Fig. 1 as line 20. Significant in this invention is the fact that the discharge opening includes at least one threaded or bottle engaging portions such as 21 and 22. In the threaded embodiment of Figs. 1-3 and 5, both threaded portions have ribs on the outer surface to aid in threading the funnel on the neck of a bottle to be filled.

The two threaded discharge portions 21 and 22 of Figs. 1 and 3 are coaxial with the larger portion 22 below the portion 21 so that the larger portion additionally acts as a guide for the funnel when being placed over the neck and receiving opening of a first size, e.g., a 0.5 thru 2.0 liter bottle. When used with a larger size bottle, the lower portion 22 engages the threads of the larger bottle, e.g., one having a 38 mm or thereabouts fill opening, in the same manner as a removable cap.

One additional feature of this embodiment is seen in Fig.

3. It is that a secondary funnel 23 is present which defines the discharge opening 0 of the funnel 10. This secondary funnel 23 is slightly smaller than the conical portion of the funnel 10 and includes an annular recess with a sealing rim 24 at the upper end of the threads 21T of the portion 21. This secondary funnel 23 not only prevents leakage around the threads but also directs flow into the bottle.

A second set of threads 22T is located within the lower section 22 with its own sealing stop 25. The section 22 has a length which is sufficient to provide at least two threads engagement with a larger size container but does not interfere with a smaller bottle's neck expansion as is illustrated in Fig.

4 where a smaller bottle neck N is indicated by dash-dot lines and a larger bottle neck NL is indicated by dash-dot-dot lines.

Also, in the case of bottles having snap-on neck rings NR below the threads of the fill opening, the section 22 is of sufficient diameter to accommodate such neck rings as is illustrated in Fig.

4.

As indicated above, in the interest of economy in tooling, the production of our funnels, similar to many of the bottles with which they will be used, may be produced employing blow molding processes as are well known in the plastic molding art and described in the Modern Plastics Encyclopedia, McGraw Hill Companies, Inc., 1996 Edition, Section D-3.

For blow molding production, the designs of Figs. 5-10 are preferred. Now referring to Fig. 5 in which the same numerals are used for identical parts as in the previous figures, the funnel lOB includes a fill opening 12, a rim 13, a tapered or conical portion 16, a first or upper threaded section 21, and a lower or larger or lower threaded section 22. The embodiment of Figs. 5 and 6 include a stop 24B and stop 25 but no handle or secondary funnel 23 owing to the process of blow molding.

Functionally both the embodiments of Figs. 1-4 and Figs. 5 and 7 are suitable for this multi size bottle use.

Fig. 6 illustrates a two size slip-on funnel 10C which is basically identical to Fig. 1 except for the lack of threads in the discharge portions 21 and 22. The inside diameters match the fill opening outside diameters of containers for intended use, e.g., 28 mm for section 21 and 38 mm for section 22. The material of the funnel is a plastic having sufficient resiliency to expand slightly while slipping over the neck of the container and engage it sufficiently to allow filling without tipping or leakage.

Fig. 7 shows that the embodiment of Fig. 6 includes two stops 24C and 25C which also act as seals when the funnel is attached.

A single size container funnel 10C with a straight sized secondary funnel 23A is shown in Figs. 8 and 9. This version is designed to provide an even and more positive connection and seal with a bottle or other container with sealing, as well. The inner surface of section 21 as well as the outer surface of secondary funnel 23A engage the outer and inner surfaces of the fill opening of the neck bottle. In this case bottles as shown in Figs. 4 in dash-dot lines with a snap-on neck rim NS may be filled but threaded battle fill openings also will be engaged by the funnel 10C.

One more embodiment of the invention is illustrated in Fig.

10. It is a single size, slip-on attachment funnel 10D with a single discharge portion 21. This version is identical for blow molding production.

Employing this invention, the user may acquire a single funnel and find it fully functional for at least two size or two fill opening type bottles to conveniently fill them without danger of leakage around the neck during the filling process.

The above described embodiments of the present invention are merely descriptive of its principles and are not to be considered limiting.