Technical Field
[0001] This invention relates to a dispensing package for liquid products, and, more particularly,
to a package which includes a measuring cup which also serves as a closure.
Background Art
[0002] A great deal of work has been directed to cleaning up the messiness generally inherent
in dispensing liquid products from their containers. U.S. Patent 3,369,710 for example,
discloses a pouring fitment which frictionally engages the outlet of a bottle and
includes a retractable telescoping spout member. A similar adapter arrangement, is
disclosed in U.S. Patent 4,298,145. In this latter patent, the antidrip adapter is
formed by two concentric tubes integrally molded with an annular inclined guide plate
connecting them.
[0003] A dripless pouring spout with a cooperating closure cap is disclosed by U.S. Patent
4,078,700. In this patent, a pouring adapter similar to that of the described lida
patent, but with the back portion of the tubular spout member open, incorporates a
deformable antidrip finger and an annular inclined drip back surface to return excess
liquid to the container. The cooperating closure cap member is formed with internal
threads to mate with the external rib or thread of the container neck. U.S. Patent
4,128,189 shows a pouring insert, very similar to those described in the patents of
lida and Hidding, which is frictionally received and held in the neck of a dispensing
bottle. In this patent, an insert cover is held in place by an annular cap whose internal
threads mate with the external threads of the container.
[0004] Another dripless pouring spout comprising a pouring adapter with a closure cap is
disclosed by U.S. Patent 2,601,039. It describes a pouring adapter having an extended
pouring spout with an open longitudinal slot on its rear surfaces, the spout being
circumscribed by an inclined drain-back surface which directs excess or spilled liquid
back into the container. A cooperating cap for the adapter is to be frictionally or
threadedly received on the upper exterior surfaces of the adapter.
[0005] Other prior work has been aimed at providing a liquid measuring device which also
serves as the closure for the liquid container. U.S. Patent 2,061,685 discloses a
closure with an integral measuring cup axially aligned therein and adapted to be applied
with its open mouth extending substantially into the neck of the container bottle.
The means for engagement with the container comprises an integrally formed annular
flange having internal threads which mate with external threads on the bottleneck.
An annular sealing ring is employed to insure a tight seal. U.S. Patent 4,273,247
provides a closure-cup assembly having internal threads to mate with the external
threads of the bottle or container. In this patent, the cup portion of the assembly
is held in an inverted position encompassing and partially covering the exterior of
said bottle or container when in the closed position.
[0006] A liquid container with a nondrip measuring cap is disclosed by U.S. Patent 4,349,056.
A resilient insert telescoped in the neck of a container has a projecting annular
lip is designed to scrape along the inner wall of the measuring cap closure to remove
the residual liquid thereon as the cap is applied to the neck of said container. The
measuring cap may be frictionally held in place, or may have internal threads on its
internal surfaces adjacent its open mouth. As used herein, residual liquid is that
which remains on a package surface after the liquid contacts it during the dispensing
operation. This can include spillage, dripping residue film and the like.
[0007] Despite all of the prior work done in this area, as evidenced by the above-cited
patents, there remain problems of messiness and inconvenience when contained liquid
product is to be dispensed into a relatively small measuring cup prior to use, especially
when the measuring cup is to be replaced on the liquid container as its closure after
such dispensing is completed. With prior art devices it was difficult, if not impossible,
to avoid having residual liquid spread or drip onto exposed package surfaces unless
the closure (and sometimes the spout) was rinsed clean after each use. Such residual
liquid is unsightly, unpleasant to touch, and tends to retain dirt and dust thereon.
[0008] French Patent 1 448 275 discloses still another dripless pouring spout with a cooperating
closure cap. It describes a pouring adapter having a pouring spout extending from
a drain back surface which is provided with a drain back/venting hole directing excess
or spilled liquid back into the container, said drain back surface being circumscribed
by a wall against the outer surface of which the closure cap is held in place by a
second circumscribing wall ending in an inwardly facing notch, coinciding with an
outwardly protruding notch on the free end of the cap. The closure cap is not provided
as a measuring cup and any liquid which might have reached this cap by accident, is
prevented from running back into the container by the wall circumscribing the drain
back surface.
Disclosure of the Invention
[0009] It is an object of this invention to obviate the above-described problems.
[0010] It is another object of the present invention to provide a liquid dispensing package
which provides for the convenient, mess-free dispensing of measured quantities of
said liquid, with a measuring cup which can be replaced on said container as its closure
with no resulting mess or inconvenience.
[0011] In accordance with one aspect of the present invention, there is provided a liquid
dispensing and measuring package, having a measuring cup which serves also as the
closure device for the system, and which is adapted to allow mess-free, convenient,
and economical dispensing and storage of a liquid product. The package includes a
container comprising a body portion with an upwardly extending finish and a dispensing
orifice. A transition collar mounted on the container finish has an outwardly extending
pouring spout and a circumscribing wall having fastening means formed on its interior
surface. A surface intermediate the spout and wall connects them and provides a means
for conveying any spilled or residual liquid back to said container. A measuring cup
has an open mouth terminating in a lip and is designed such that it is also the closure
for said system. The cup has outwardly facing fastening means, such as threads or
snap- fit protrusions, formed on its external surface adjacent said lip at its open
end. The external fastening means on said measuring cup mate with the inwardly facing
internal fastening means on the transition collar to attach and seal the cup in inverted
condition. As a result, any liquid possibly left over in the cup after dispensing
is in direct fluid communication with the drains means, conveying it back to the container.
Brief Description of the Drawings
[0012] While the specification concludes with claims particularly pointing out and distinctly
claiming the present invention, it is believed that the same will be better understood
from the following description taken in conjunction with the accompanying drawings
in which:
Figure 1 is a fragmentary front elevational view of a preferred embodiment of the
package of the present. invention;
Figure 2 is a fragmentary, exploded, perspective view of the embodiment of Figure
1;
Figure 3 is a vertical cross-sectional view of the measuring cup taken along the line
3-3 of Figure 2;
Figure 4 is a vertical cross-sectional view of the transition collar of Figure 2 taken
along the line 4-4 thereof;
Figure 5 is a fragmentary, vertical cross-sectional view of the package of Figure
1 during the dispensing operation with the measuring cup performing its measuring
function;
Figure 6 is a fragmentary, vertical, partial cross-sectional view of the package of
Figure 1 in closed condition following dispensing;
Figure 7 is a horizontal cross-sectional view through the container finish taken below
the means for attachment on the finish and showing the interlock means of the preferred
embodiment;
Figure 8 is a fragmentary, vertical, partial cross-sectional view of another preferred
embodiment of the package of the present invention, shown in assembled position;
Figure 9 is a fragmentary, exploded, vertical cross-sectional view of the package
of Figure 8; and
Figure 10 is a top view of the transition collar of Figure 9.
Detailed Description of the Invention
[0013] Referring now 'to the drawings in detail, wherein like numerals indicate the same
elements throughout the views, there is illustrated a preferred embodiment of a liquid
pouring and measuring package of the present invention. The package 10 includes a
liquid product container 12, a transition collar 14 to be mounted on the container
12, and a measuring cup 16.
[0014] The container 12 is constructed of any moldable polymeric material, such as polyethylene
or polypropylene, and has a body portion 74, an upwardly extending finish 72 and,
as shown in Figure 2, a flat annular lip 70 on the upper surface of the finish 72
defining orifice 80. The balance of the body portion 74 which is not shown in Figure
1 may be of any desired configuration and provides a closed-end chamber suitable for
containing the product to be dispensed. The preferred embodiment of said body portion
74 shown has an integrally molded handle 74a to provide a prominent or recognizable
gripping or hand hold means to facilitate dispensing and to properly orient the transition
collar 14 during pouring of the product, as will be more fully understood from the
subsequent description. The orientation effect could also be achieved by other hand
hold means known to those skilled in the art. For example, a discrete, palm-fitting
area of the container which is ribbed or provided with knurl-like embossments could
be molded into the body portion 74 to aid in gripping.
[0015] An interlock means, comprising a plurality of locking teeth 82, is located at the
base of the container finish 72. These locking teeth 82 are shown best in Figure 7
as being disposed in two diametrically opposed groups of several juxtaposed ratchet-type
teeth 82 each, integrally molded around the base of the container finish 72 adjacent
and below the thread convolutions 75 illustrated in Figure 2. Since the preferred
manner of forming the container 12 is blow-molding and since following the blow-molding
process the two halves of the mold must be separated, the locking teeth 82 are formed
so as not to interfere with the mold separation. As shown most clearly in Figure 7,
the locking teeth of the preferred embodiment are formed in two sets of 10 teeth 82,
with the teeth 82 radially spaced ten degrees (10°) from each other. The sets are
located apart on opposite sides of the mold parting line at the base of said container
finish 72.
[0016] Transition collar 14 is preferably injection molded of a thermoplastic material,
such as polypropylene or the like and desirably is slightly harder than the material
of either the container 12 or the cup 16. This preferred variance in hardness provides
better sealing between the collar and the container, and the cup and the collar, as
will be discussed below. While even harder materials such as polystyrene materials
can be used for the transition collar, polypropylene is preferred due to its better
stress crack resistance.
[0017] Transition collar 14 is best shown in Figures 2 and 4 as having a circumscribing
cylindrical outer wall portion 50, an outwardly projecting tubular pouring spout 52,
a drain-back shoulder 57 having a frusto conically configured upper surface and an
inclined drain back partition 55. The drain back partition 55 and shoulder 57 essentially
create a transverse partition which separates the outer wall portion 50 into top and
bottom sections and has a vent/drain hole 54 extending through the lowermost portion
of drain back partition 55. If desired, the vent/drain hole 54 can extend through
the contiguous portion of wall 51 instead of through the drain back partition.
[0018] In the bottom section of transition collar 14, as best shown in Figure 4, on the
inner surface of the circumscribing wall 50 along the lowermost edge are a multiplicity
of inwardly extending uniformly spaced locking teeth 68. The locking teeth 68 are
integrally molded in the form of thin planar sections of material each of which lies
at an angle of about 65° with a radial line intersecting its outermost extremity.
The lower surfaces of the teeth 68 are upwardly inclined in an inward direction and
the innermost surface of each is truncated at an angle which is approximately tangent
to a circle connecting the inner ends of the teeth 68. The diameter of the circle
is smaller than the diameter of a circle connecting the outer tips of the teeth 82
so that as the collar is applied, the teeth 68 must flex to slide past teeth 82. An
interference of approximately 1.0 mm between the teeth 68 and 82 has been found satisfactory.
The teeth 68 are adapted to interlock with the locking teeth 82 of the container 12
and, in effect, perform a pawl-like function. It will be understood, however, that
any means for fastening or interlocking the transition collar 14 against rotational
movement relative to the container 12 in the unfastening direction may be employed.
For example, a vertically oriented rib and groove interlock arrangement can be used.
In the embodiment shown in Figure 4, there are 24 locking teeth 68 uniformly spaced
at 15° intervals around the inner periphery of the lower portion of circumscribing
wall 50 so that when said collar is securely tightened into said container, every
other locking tooth 68 of the transition collar will interlock with a locking tooth
82 in the container 74 and, therefore, restrict any rotation in the loosening direction.
The resultant interlock action between said container and said collar will allow the
measuring cup 16 to be removed and replaced on the upper portion of transition collar
14 without causing rotation of collar 14.
[0019] Adjacent and above locking teeth 68 in the bottom section of transition collar 14
are threads 64 which cooperate with threads 75 on container finish 72. Again, any
means of mounting collar 14 on container 12 may be employed; however, where collar
14 has a drain back partition with a drain hole, such as vent/drain hole 54, the collar
14 desirably should be oriented so that users will not pour the contained liquid from
both the spout 52 and the vent/drain hole 54 simultaneously, which would prevent proper
venting and make it difficult to control the stream of product. In the desired embodiment
the threads 64 of the collar 14 and the threads 75 of the container 12 are designed
and matched so as to mount the transition collar 14 onto container 12 and orient the
vent/drain hole 54 so that it is generally radially aligned with and adjacent, e.g.
within about 30° of, the hand hold means (handle 74a) when tightened. In tightened
condition the annular sealing ring 62 on the lower surfaces 60 of drain back shoulder
57 of the collar 14 will contact and slightly deform or cut into the softer material
of the flat lip 70 of container 12, thus creating a tight seal. As shown in Figure
4, the annular lower surface 60 of the drain back shoulder 57 is substantially flat
and at right angles with the axis of collar 14, so that the sealing ring 62 can fully
contact flat lip 70.
[0020] Drain back shoulder 57 is integrally attached on its outer periphery to the inner
surface of circumscribing wall 50, and its upper surface is inclined steeply toward
the central axis of transition collar 14. The angle of inclination of the surface
of shoulder 57 is not critical, but should be steep enough to facilitate gravitational
movement of any residual liquid placed thereon toward the vent/drain hole 54. In the
preferred embodiment the shoulder 57 is sloped at approximately 30° relative to the
horizontal. The inclined drain back partition 55 is integrally attached to both the
inner periphery of drain back shoulder 57, and the outer surface of the extended pouring
spout 52. Because of the inclined nature of the partition 55, a truncated cylindrical
drain back wall 51 provides the connection between the partition 55 and the inner
periphery of said drain back shoulder 57 to complete the separation of the top and
bottom sections of collar 14 in locations other than through vent/drain hole 54.
[0021] In the top section, extended pouring spout 52 is coaxial of the transition collar
14 in the embodiment shown, however, the spout 52 could be located off-center or could
be formed in a bent position, if desired, to aid in pouring. The diameter of pouring
spout 52 is not critical and can be sized for convenience in pouring the particular
liquid involved. The overall height of said spout 52 is also not critical, but must
fit within said inverted cup 16 in the sealed position, as seen in Figure 6, and should
extend outwardly from collar 14 a sufficient distance to insure maximum dispensing
and mess control, whether the container is completely full or partially empty.
[0022] The uppermost surface of spout 52 in the illustrated embodiment includes a lip 56
designed to minimize dripping action of liquid. In the preferred embodiment, lip 56
is formed by beveling or rounding-off the inner surface of the distal end of spout
52 to create a sharper conformation, as best seen in Figure 4.
[0023] Adjacent to the above drain-back shoulder 57 and formed on the inner surface of the
circumscribing wall 50, is an annular interior wall 53. Interior wall 53 has a diameter
slightly smaller than the internal passageway elements formed above it and can be
sized as to form an annular contact seal with measuring cup 16 when it is engaged
with collar 14. Preferably annularwall 53 is tapered, so that its diameter adjacent
shoulder 57 is smaller than its diameter at higher levels, to
[0024] enhance its sealing capability. Above annular wall 53, also on the inner surface
of said circumscribing wall 50 and adjacent its top surface, are formed a fastening
means, inwardly facing threads 58, to receive the corresponding outwardly facing threads
40 of measuring cup 16 to be described. The top surface of circumscribing wall 50
is formed with a sealing ring 59 to contact and form a tight seal with cup 16 when
the same is threadedly attached to collar 14. The heights of sealing rings 59 and
62, of course, should be designed to compensate for the various tolerances of the
molded parts. Both will seal because of the interaction of the hard sealing ring pressing
against or into softer sealing surfaces, as described above.
[0025] The measuring cup 16 is shown in Figure 3 as being generally cup-shaped with a bottom
wall 34, a depending skirt-like sidewall 36, and an open mouth 37 terminating in a
lip 39. Preferably, the cup 16 is injection molded of a fairly dense polymer, such
as medium to high density polyethylene, for compressive strength. As discussed earlier,
the preferred embodiment utilizes softer material for the container 12 and cup 16
to allow the sealing rings 62 and 59 on the collar 14 to slightly deform or cut into
the mating surfaces.
[0026] As best shown in Figure 3, lip 39 is formed as a drip-prevention lip for cup 16 when
the same is used as a measuring cup, and to be an inner seal in contact with annular
interior wall 53 of the collar 14 when cup 16 is used as the closure for the package
10. This is accomplished by having the lip 39 flare outwardly and terminate in a sharp
edge. The sealing function of the lip 39 is best illustrated by the cross-sectional
view in Figure 6, showing the closed package following use. The particular configuration
of the lip 39 can be modified by those skilled in the art to suit particular applications
and need not be of an anti-drip variety.
[0027] Adjacent lip 39 on the external surface of said cup is an outwardly facing fastening
means, threads 40, adapted to cooperate with the inwardly facing threads 58 of collar
14. While other types of fastening means can be employed, threads are preferred to
insure a tight seal between the collar 14 and cup 16. The number and spacing of such
threads is not critical so long as a reliably secure closed arrangement results.
[0028] A coaxial shoulder 38, located adjacent the side of the threads 40 spaced from the
lip 39, projects outwardly from the exterior surface of sidewall 36 and provides a
sealing surface 35 adapted to contact sealing ring 59 on the upper surface of circumscribing
wall 50 of collar 14 when the measuring cup 16 is fastened in inverted condition on
the collar 14. In the preferred embodiment, as can best be seen in Figure 3, the substantially
flat, annular sealing surface 35 of shoulder 38 extends radially from said sidewall
36 at approximately a 90° angle. The seal between cup 16 and collar 14 could also
be accomplished in other ways such as providing an annular gasket (not shown) on the
surface 35 or attaching such a gasket to transition collar 14. Such alternate methods
of sealing would be preferred if cup 16 was snap-fitted or otherwise attached than
by threads.
[0029] The width of projecting shoulder 38 should be sufficient to insure complete surface
contact between ring 59 and sealing surface 35. The thickness of shoulder 38 is not
critical, but should be such as to provide sufficient rigidity for surface 35 to insure
a tight seal with the collar 14 as described above.
[0030] The portion of cup 16 extending below sealing surface 35, as shown in Figures 2 and
3, including threads 40 and drip prevention lip 39, are dimensioned so that the surface
35 will contact and seal with sealing ring 59 prior to any substantial contact of
drip-prevention lip 39 with drip back shoulder 57 when cup 16 is threadedly attached
to collar 14.
[0031] The dimensions and overall shape of cup 16 are functionally related to the dosage
requirements of the liquid involved. The cup 16 should preferably have a volume slightly
greater than the volume required as the dosage and the exterior of said cup may be
textured or formed in some way to facilitate tactile manipulation. For example, cup
14 can be provided with external ribs or other embossments to aid in gripping for
removal or replacement. The interior of said cup can be formed with indicia (not shown
with respect to cup 16) which indicates fill levels for measurement of the liquid
product.
[0032] While the preferred embodiment shows the measuring cup 16 to be of substantially
annular cross-section throughout, such annular cross-section is only essential in
the areas near its open mouth where it must attach and seal with collar 14. Therefore,
the configuration of the bottom wall 34 and the depending sidewall 36 above the sealing
shoulder 38, as shown in Figures 2 and 3, could be varied as desired.
[0033] In use, the liquid product is placed in the container 12 and the transition collar
14 and measuring cup 16 are screwed down to sealing condition. During application
of the measuring cup 16 onto collar 14, the seals there-between are created by annular
contact between sealing ring 59 and sealing surface 35, and between drip-prevention
lip 39 and annular wall 53. The cup 16 can thereafter be removed by a user and employed
as a measuring cup for dispensing liquid product as shown in Figure 5. When cup 16
is filled to a desired level, container 12 is brought to an upright position and spout
lip 56 will minimize the liquid which might otherwise drip therefrom. Any liquid which
does drip from pouring spout 52 will run down its exterior surface and collect on
the inclined drain back partition 55 and from there gravitate to the vent/drain hole
54 through which it will be returned to container 12 via orifice 80. When the liquid
which was measured into cup 16 is dispensed therefrom, the drip-prevention lip 39
will minimize dripping over its edge. The user then inverts and replaces cup 16 on
transition collar 14, screwing it down
[0034] tightly. The resulting seal formed between sealing ring 59 and lip 35 and between
the drip-preventing lip 39 and the annular wall portion 53 will prevent liquid product
from escaping. It can be seen that if the package in the closed position, as shown
in Figures 1 and 6, were knocked over, there would be no resulting leakage, and upon
being returned to an upright position, any liquid in the collar 14 area would drain
back into container 12.
[0035] Figure 6 is a sectional view of the elements of the present invention in their sealed
position after a complete use sequence, as described above. Any residual liquid in
cup 16 will drain down onto drip back shoulder 57, gravitate toward the central axis
of said collar, and along with any other collected residual liquid move along the
inclined drain-back partition 55 to vent/drain hole 54 and therethrough into the container.
The vent/drain hole 54 can be provided of various sizes and configurations, and, if
desired, can be provided with baffles to interfere with product flow therethrough
or to prevent visual access to the interior of the container 12. The size of the vent/drain
hole 54, however, should be designed taking into consideration the liquid product
viscosity and desired flow rate of the product to allow for sufficient influx of air
during the pouring operation to facilitate smooth and steady dispensing, and to allow
any collected residual liquid to be returned to said container relatively quickly
after the package is returned to an upright position.
[0036] Figures 8 through 10 illustrate an alternate and equally preferred liquid product
pouring and measuring package. Particularly, Figures 8 through 10 illustrate package
200 comprising container 212, transition collar 214 to be mounted on container 211,
and measuring cup 216.
[0037] Container 212 corresponds substantially identically to container 12, as described
with regard to package 10, with the exception that the upwardly extending finish 272
of container 212 extends upwardly somewhat higher than did the corresponding finish
72. Interlocking teeth 282 and thread convolutions 275 correspond exactly to parts
82 and 75 of package 10.
[0038] Likewise, transition collar 214 corresponds substantially identically to transition
collar 14, described above, except that pouring spout 252 is formed with an open backside
290, and drain/vent hole 254 extends from the open bottom of spout 252. Pouring spout
252 is shown as being located centrally with respect to the central axis of transition
collar 214; however, it is contemplated that spout 252 could be located slightly off-center
(not shown) to aid in pouring accuracy and convenience. Locking teeth 268 correspond
exactly to locking teeth 68 described above with regard to transition collar 14. The
lower portion of outerwall 250 of transition collar 214 is flared outwardly and downwardly
to better conform to the shape of the upper portions of container 212. It is further
contemplated that spout 252 and drain/vent 254 (and correspondingly spout 52 and drain/vent
54, as described above) could be formed with a thin removable membrane or tear strip
(not shown) over their open portions for sealing of the package prior to initial use.
[0039] Measuring cup 216 also corresponds substantially identically with measuring cup 16,
as described above. In Figure 8 cup 216 has been only partially sectioned in order
to show vent groove 241, which represents one means of venting and thus preventing
or minimizing pressure buildup within package 200 during re-attachment of cup 216
onto transition collar 214. Pressure build-up is preferably avoided as it may tend
to force residual product through the cooperating fastening means between measuring
cup 216 and transition collar 214 and onto the outer surface of package 200. Vent
241 is simply a channel or interruption of the external threads 240 of cup 216, which
is of sufficient depth to permit air to escape from package 200 at least during the
initial stages of application of cup 216 to transition collar 214. Other means of
venting the package 200, such as a one-way valve, can also be used to prevent such
pressure buildup. Similar grooves could also be incorporated on package 10, as described
above. The interior of cup 216 is illustrated as including several fill level lines
295 as examples of indicia which can be used to indicate fill levels for measurement
of the liquid product.
[0040] Various modifications of the described invention will be apparent to those skilled
in the art. Examples of several such variations have been mentioned above, such as
alternate means of non- rotatably mounting the transition collar on the container,
and alternative ways of sealing various elements in a closed position. Accordingly,
the scope of the present invention should be considered in terms of the following
claims and is understood not to be limited to the details of structure and operation
described and shown in the specification and drawings.